The IOSR Journal of Pharmacy (IOSRPHR) is an open access online & offline peer reviewed international journal, which publishes innovative research papers, reviews, mini-reviews, short communications and notes dealing with Pharmaceutical Sciences( Pharmaceutical Technology, Pharmaceutics, Biopharmaceutics, Pharmacokinetics, Pharmaceutical/Medicinal Chemistry, Computational Chemistry and Molecular Drug Design, Pharmacognosy & Phytochemistry, Pharmacology, Pharmaceutical Analysis, Pharmacy Practice, Clinical and Hospital Pharmacy, Cell Biology, Genomics and Proteomics, Pharmacogenomics, Bioinformatics and Biotechnology of Pharmaceutical Interest........more details on Aim & Scope).
The study investigated the protective effects of losartan, an angiotensin II type 1 receptor blocker, on intestinal ischemia-reperfusion injury in rats. Forty rats were divided into four groups: sham operation, ischemia, ischemia/reperfusion (I/R), and I/R + losartan treatment. Biochemical markers and histopathological analysis of the jejunum tissue were performed. Losartan treatment reduced oxidative stress markers, inflammation, and apoptosis compared to the I/R group. This suggests losartan may protect against intestinal damage caused by ischemia-reperfusion injury.
This study investigated the effects of spinal cord injury on the bladder tissue of rats. Twenty rats were divided into a control group and spinal cord injury (SCI) group. The SCI group exhibited statistically higher levels of oxidative stress markers (MDA, MPO), epithelial degeneration, vascular dilation, inflammation, and expression of VEGF and APAF-1 compared to the control group. The SCI group also had lower levels of the antioxidant GSH. Histological examination of the SCI group showed degeneration of epithelial cells, thickened fibrosis, dilated blood vessels, and increased VEGF and APAF-1 expression compared to the control group. The results suggest that spinal cord injury leads to increased oxidative stress, inflammation and apoptosis in
Objective: To investigate the effect of sildenafil on reducing the impact of hepatic ischemia/reperfusion (HIR) injury established by Pringle maneuver on the heart of rats.
Study Design: Forty Wistar albino rats were divided into 4 groups: Sham (laparotomy only), Control (laparotomy following sildenafil application), IR (ischemia/reperfusion injured by HIR), and IR+SIL (injured by HIR following sildenafil application). Ischemia was developed by clamping the hepatoduodenal ligament for 30 minutes; then reperfusion was applied for 30 minutes. Sildenafil (single dose of 50 mg/kg) was administered by oral gavage for 15 minutes before ischemia. Blood samples of rats were collected from Sham and Control groups at 60 minutes and from IR and IR+SIL groups at 30 minutes after initiation of reperfusion for biochemical analysis. Meanwhile, heart tissues were sampled for biochemical analysis. Malondialdehyde (MDA) and total antioxidant capacity (TAC) in serum samples and TAC, total oxidative capacity (TOC), and oxidative stress index in heart tissues were examined biochemically.
Results: Serum MDA levels were elevated significantly in the IR and IR+SIL groups as compared to the sham group. Sildenafil treatment inhibited MDA increase considerably in the IR+SIL group as compared to the IR group. Serum TAC levels were elevated significantly in the sildenafil and control groups (compared with sham groups) and in the IR+SIL group (compared with the IR group). TAC levels detected in heart tissue increased significantly in the IR group as compared to the sham group; however, sildenafil treatment had no effect on this increase.
Conclusion: Heart tissue was affected by HIR. It was revealed that sildenafil treatment may prevent the oxidative stress via increasing serum TAC levels in both control and IR+SIL groups.
Objective: To study the effects of resveratrol in neuronal structures in traumatic brain injury (TBI).
Study Design: Thirty rats were categorized as (1) control group (n=10), saline solution administered i.p. for 14 days, (2) TBI group (n=10), trauma induced by weight-drop model on brain, and (3) TBI+Resveratrol group (n=10), 15 minutes after injury the rats were given resveratrol (10 μmoL/kg/i.p.) for 14 days. At the end of the experiment the cerebellum was excised for routine paraffin tissue protocol. Blood samples were tested for serum biochemical markers (MDA, SOD, CAT, and GSH-x).
Results: SOD, GPx, and CAT values were lowest in the TBI group. MDA and histological scores of dilations in vessels, inflammation, degeneration in neurons, apoptosis in microglia, ADAMTS8, and GFAP expressions were highest in the TBI group. Sections of the control group showed normal cerebellar histology. The trauma group showed degenerated ganglion layer, pyknotic and apoptotic Purkinje cell nuclei. Vascular thrombus was seen in the substantia alba and substantia grisea. In the Trauma+Resveratrol group, most pa- thologies observed in the TBI group were improved. In the control group, GFAP protein was expressed in granular cells, axons, dendrites, Purkinje cells, and microglia cells. In the trauma group, increased GFAP expression was observed in glial processes, neurons, and Purkinje cells. In the Trauma+Resveratrol group, GFAP was expressed in molecular layer and glial processes. In the control group, ADAMTS-4 activity was observed in granulosa layer, glial cells, and Purkinje cells. In the trauma group, ADAMTS-4 expression was positive in Purkinje cells and glial cells. In the Trauma+ Resveratrol group, ADAMTS-4 was expressed in Purkinje cells, granular cells, and glial cells.
Conclusion: GFAP and ADAMTS-4 proteins may be involved in regeneration of damaged astroglial cells and other glial cells, Purkinje cells, and synaptic extensions. We suggest that antioxidative drugs such as resveratrol may be alternative target agents in neurological disease.
Keywords: ADAMTS-4, brain, cerebellum, GFAP, rat, resveratrol, traumatic brain injury
This study investigated the effects of gallic acid on testicular injury caused by ischemia-reperfusion in a rat testicular torsion model. Forty rats were divided into four groups: a control group, a torsion group, a torsion/detorsion group, and a torsion/detorsion plus gallic acid group. Biochemical markers and immunohistochemical staining for caspase-3 and TNF-α were analyzed. The results showed that gallic acid treatment decreased oxidative stress markers, reduced apoptosis and inflammation, and helped protect testicular tissue compared to the torsion/detorsion group without treatment. The study suggests that gallic acid may be a potential therapeutic agent for testicular ischemia-reperfusion injury.
A standardized aqueous extract of Anoectochilus formosanus modulated airway h...Cây thuốc Việt
Anoectochilus formosanus HAYATA, a Chinese herb, is a valued folk medicine for fever, pain, and diseases of the lung and liver. Allergic asthma is characterized by increased serum IgE level and inflammation of the airways with high levels of interleukin (IL)-4 and IL-5 in bronchoalveolar lavage fluids (BALF). Constriction of airway smooth muscle and evelopment of airway hyperresponsiveness (AHR) are the
most important symptoms of allergic asthma. In our previous study, a standardized aqueous extract of A. formosanus (SAEAF) was used to modulate innate immunity of normal mice. In this study, airway inflammatory infiltrations, including T cell differentiation, cytokine modulation, allergic antibodies
estimation, pulmonary pathology, and enhanced pause (Penh) of AHR were used to evaluate SAEAF treatment of an ovalbumin (OVA)-inhaled airway allergic murine model. The resulting cytokine profiles demonstrated that SAEAF can significantly reduce Th2 polarization after administration of SAEAF in OVA inhalation. These results also suggest that SAEAF modulates cytokine secretion in allergic asthma.
Modulated natural T regulatory cells (CD25+/CD4+, Treg) were also shown to increase immunosuppression in the allergic lung inflammation and further down-regulate airway inflammatory
infiltration in eosinophils and macrophages. Finally, decreased airway anti-OVA IgE secretion and reduced AHR were observed. Our results indicate that the administration of SAEAF can modulate cytokines and T cell subpopulation by regulating inflammatory cell infiltration and modulating the allergic response. & 2009 Elsevier GmbH. All rights reserve
Role of serum trace elements magnesium, copper and zinc, level in Libyan pati...iosrjce
IOSR Journal of Biotechnology and Biochemistry (IOSR-JBB) covers studies of the chemical processes in living organisms, structure and function of cellular components such as proteins, carbohydrates, lipids, nucleic acids and other biomolecules, chemical properties of important biological molecules, like proteins, in particular the chemistry of enzyme-catalyzed reactions, genetic code (DNA, RNA), protein synthesis, cell membrane transport, and signal transduction. IOSR-JBB is privileged to focus on a wide range of biotechnology as well as high quality articles on genetic engineering, cell and tissue culture technologies, genetics, microbiology, molecular biology, biochemistry, embryology, cell biology, chemical engineering, bioprocess engineering, information technology, biorobotics.
In vivo studies of wound healing and hepatoprotective agentsAdarsh Patil
1) Various in vivo models are used to evaluate wound healing and hepatoprotective activity, including excision wounds, incision wounds, and burn wounds in rats.
2) Parameters like wound contraction, epithelization time, tensile strength and histopathology are measured to assess wound healing.
3) Hepatoprotective activity is evaluated by pre-treating animals with the test substance before inducing liver damage using toxins like CCl4, D-galactosamine, or paracetamol. Liver function is then assessed through serum enzymes and histopathology.
The study investigated the protective effects of losartan, an angiotensin II type 1 receptor blocker, on intestinal ischemia-reperfusion injury in rats. Forty rats were divided into four groups: sham operation, ischemia, ischemia/reperfusion (I/R), and I/R + losartan treatment. Biochemical markers and histopathological analysis of the jejunum tissue were performed. Losartan treatment reduced oxidative stress markers, inflammation, and apoptosis compared to the I/R group. This suggests losartan may protect against intestinal damage caused by ischemia-reperfusion injury.
This study investigated the effects of spinal cord injury on the bladder tissue of rats. Twenty rats were divided into a control group and spinal cord injury (SCI) group. The SCI group exhibited statistically higher levels of oxidative stress markers (MDA, MPO), epithelial degeneration, vascular dilation, inflammation, and expression of VEGF and APAF-1 compared to the control group. The SCI group also had lower levels of the antioxidant GSH. Histological examination of the SCI group showed degeneration of epithelial cells, thickened fibrosis, dilated blood vessels, and increased VEGF and APAF-1 expression compared to the control group. The results suggest that spinal cord injury leads to increased oxidative stress, inflammation and apoptosis in
Objective: To investigate the effect of sildenafil on reducing the impact of hepatic ischemia/reperfusion (HIR) injury established by Pringle maneuver on the heart of rats.
Study Design: Forty Wistar albino rats were divided into 4 groups: Sham (laparotomy only), Control (laparotomy following sildenafil application), IR (ischemia/reperfusion injured by HIR), and IR+SIL (injured by HIR following sildenafil application). Ischemia was developed by clamping the hepatoduodenal ligament for 30 minutes; then reperfusion was applied for 30 minutes. Sildenafil (single dose of 50 mg/kg) was administered by oral gavage for 15 minutes before ischemia. Blood samples of rats were collected from Sham and Control groups at 60 minutes and from IR and IR+SIL groups at 30 minutes after initiation of reperfusion for biochemical analysis. Meanwhile, heart tissues were sampled for biochemical analysis. Malondialdehyde (MDA) and total antioxidant capacity (TAC) in serum samples and TAC, total oxidative capacity (TOC), and oxidative stress index in heart tissues were examined biochemically.
Results: Serum MDA levels were elevated significantly in the IR and IR+SIL groups as compared to the sham group. Sildenafil treatment inhibited MDA increase considerably in the IR+SIL group as compared to the IR group. Serum TAC levels were elevated significantly in the sildenafil and control groups (compared with sham groups) and in the IR+SIL group (compared with the IR group). TAC levels detected in heart tissue increased significantly in the IR group as compared to the sham group; however, sildenafil treatment had no effect on this increase.
Conclusion: Heart tissue was affected by HIR. It was revealed that sildenafil treatment may prevent the oxidative stress via increasing serum TAC levels in both control and IR+SIL groups.
Objective: To study the effects of resveratrol in neuronal structures in traumatic brain injury (TBI).
Study Design: Thirty rats were categorized as (1) control group (n=10), saline solution administered i.p. for 14 days, (2) TBI group (n=10), trauma induced by weight-drop model on brain, and (3) TBI+Resveratrol group (n=10), 15 minutes after injury the rats were given resveratrol (10 μmoL/kg/i.p.) for 14 days. At the end of the experiment the cerebellum was excised for routine paraffin tissue protocol. Blood samples were tested for serum biochemical markers (MDA, SOD, CAT, and GSH-x).
Results: SOD, GPx, and CAT values were lowest in the TBI group. MDA and histological scores of dilations in vessels, inflammation, degeneration in neurons, apoptosis in microglia, ADAMTS8, and GFAP expressions were highest in the TBI group. Sections of the control group showed normal cerebellar histology. The trauma group showed degenerated ganglion layer, pyknotic and apoptotic Purkinje cell nuclei. Vascular thrombus was seen in the substantia alba and substantia grisea. In the Trauma+Resveratrol group, most pa- thologies observed in the TBI group were improved. In the control group, GFAP protein was expressed in granular cells, axons, dendrites, Purkinje cells, and microglia cells. In the trauma group, increased GFAP expression was observed in glial processes, neurons, and Purkinje cells. In the Trauma+Resveratrol group, GFAP was expressed in molecular layer and glial processes. In the control group, ADAMTS-4 activity was observed in granulosa layer, glial cells, and Purkinje cells. In the trauma group, ADAMTS-4 expression was positive in Purkinje cells and glial cells. In the Trauma+ Resveratrol group, ADAMTS-4 was expressed in Purkinje cells, granular cells, and glial cells.
Conclusion: GFAP and ADAMTS-4 proteins may be involved in regeneration of damaged astroglial cells and other glial cells, Purkinje cells, and synaptic extensions. We suggest that antioxidative drugs such as resveratrol may be alternative target agents in neurological disease.
Keywords: ADAMTS-4, brain, cerebellum, GFAP, rat, resveratrol, traumatic brain injury
This study investigated the effects of gallic acid on testicular injury caused by ischemia-reperfusion in a rat testicular torsion model. Forty rats were divided into four groups: a control group, a torsion group, a torsion/detorsion group, and a torsion/detorsion plus gallic acid group. Biochemical markers and immunohistochemical staining for caspase-3 and TNF-α were analyzed. The results showed that gallic acid treatment decreased oxidative stress markers, reduced apoptosis and inflammation, and helped protect testicular tissue compared to the torsion/detorsion group without treatment. The study suggests that gallic acid may be a potential therapeutic agent for testicular ischemia-reperfusion injury.
A standardized aqueous extract of Anoectochilus formosanus modulated airway h...Cây thuốc Việt
Anoectochilus formosanus HAYATA, a Chinese herb, is a valued folk medicine for fever, pain, and diseases of the lung and liver. Allergic asthma is characterized by increased serum IgE level and inflammation of the airways with high levels of interleukin (IL)-4 and IL-5 in bronchoalveolar lavage fluids (BALF). Constriction of airway smooth muscle and evelopment of airway hyperresponsiveness (AHR) are the
most important symptoms of allergic asthma. In our previous study, a standardized aqueous extract of A. formosanus (SAEAF) was used to modulate innate immunity of normal mice. In this study, airway inflammatory infiltrations, including T cell differentiation, cytokine modulation, allergic antibodies
estimation, pulmonary pathology, and enhanced pause (Penh) of AHR were used to evaluate SAEAF treatment of an ovalbumin (OVA)-inhaled airway allergic murine model. The resulting cytokine profiles demonstrated that SAEAF can significantly reduce Th2 polarization after administration of SAEAF in OVA inhalation. These results also suggest that SAEAF modulates cytokine secretion in allergic asthma.
Modulated natural T regulatory cells (CD25+/CD4+, Treg) were also shown to increase immunosuppression in the allergic lung inflammation and further down-regulate airway inflammatory
infiltration in eosinophils and macrophages. Finally, decreased airway anti-OVA IgE secretion and reduced AHR were observed. Our results indicate that the administration of SAEAF can modulate cytokines and T cell subpopulation by regulating inflammatory cell infiltration and modulating the allergic response. & 2009 Elsevier GmbH. All rights reserve
Role of serum trace elements magnesium, copper and zinc, level in Libyan pati...iosrjce
IOSR Journal of Biotechnology and Biochemistry (IOSR-JBB) covers studies of the chemical processes in living organisms, structure and function of cellular components such as proteins, carbohydrates, lipids, nucleic acids and other biomolecules, chemical properties of important biological molecules, like proteins, in particular the chemistry of enzyme-catalyzed reactions, genetic code (DNA, RNA), protein synthesis, cell membrane transport, and signal transduction. IOSR-JBB is privileged to focus on a wide range of biotechnology as well as high quality articles on genetic engineering, cell and tissue culture technologies, genetics, microbiology, molecular biology, biochemistry, embryology, cell biology, chemical engineering, bioprocess engineering, information technology, biorobotics.
In vivo studies of wound healing and hepatoprotective agentsAdarsh Patil
1) Various in vivo models are used to evaluate wound healing and hepatoprotective activity, including excision wounds, incision wounds, and burn wounds in rats.
2) Parameters like wound contraction, epithelization time, tensile strength and histopathology are measured to assess wound healing.
3) Hepatoprotective activity is evaluated by pre-treating animals with the test substance before inducing liver damage using toxins like CCl4, D-galactosamine, or paracetamol. Liver function is then assessed through serum enzymes and histopathology.
Objective: To evaluate the antibacterial effects of 4 different cavity disinfectants on Streptococcus mutans, Lactobacillus acidophilus, and Enterococcus faecalis bacteria in different time periods.
Study Design: The antibacterial effects of Cavity Cleanser, Tubulicid Red Label, Chloraxid 2%, and Oxygenated Water cavity disinfectant solutions on E. faecalis (ATCC 29212), S. mutans (ATCC 25175), and L. acidophilus (RSKK 03037) bacterial strains were evaluated by disk diffusion method. In the study where vancomycin antibiogram disc constituted the positive control group, physiological saline solution was used as the negative control group. Standard, sterile, blank antibiogram discs of 5 mm in diameter, in which 15 μL of each material were added, were placed on agar plates at 2.5–3 cm intervals. The inhibition zone diameters formed around the discs that were left to incubate for 24–48 hours at 37°C were measured in millimeters. Statistical analysis of the data was performed using one-way analysis of variance, Kolmogorov-Smirnov, Levene, and Bonferroni tests.
Results: At the end of the study the solutions tested showed a statistically significant antibacterial effect on all bacterial strains used (p<0.05). Cavity Cleanser disinfectant containing 2% chlorhexidine showed the highest antibacterial effect on S. mutans and L. acidophilus, and benzalkonium-containing Tubulicid Red disinfectant on E. faecalis.
Conclusion: The antibacterial effect of all cavity disinfectants used in the study was found to be higher at the end of the 48th hour than at the end of the 24th hour, but there was no statistically significant difference (p>0.05).
Keywords: antibacterial agents; antibacterial effect; cavity disinfectants; chlorhexidine; contamination; dental caries; disinfection; disc diffusion; gram-negative bacteria; gram-positive bacteria
Effect of Gonadotrophin (Pergonal®) on Haematological and Serum Biochemical P...Agriculture Journal IJOEAR
Abstract— Twelve Ouda rams aged 2 – 2.6 years and weighed between 40.21 – 40.32kg were randomly distributed into 3 groups of 4 animals with one ram per replicate in a completely randomized design and used to determine the effect of Pergonal® on haematology and serum biochemistry. These groups were assigned to 3 levels of Pergonal® injection as treatments. The injections were 0.00i.u, 49.50i.u, and 99.00i.u Pergonal® represented as T1 (control), T2, and T3, respectively. All the treatments were administered by intramuscular injections. The injections were divided into three doses each and administered intramuscularly in the thigh for three consecutive days. The results of the study showed that apart from Alanine transaminase and eosinophils, the haematological and serum biochemical parameters and immune status of ouda rams may be affected when 49.50i.u or more of Pergonal are used for induction of spermatogenesis. These parameters should be constantly monitored during pergonal administration in ouda rams.
The study aimed to examine the protective effects of taxifolin on cisplatin-induced kidney damage in rats. Rats were divided into three groups: a healthy control group, a cisplatin group, and a taxifolin-cisplatin group. The cisplatin group was given cisplatin only, while the taxifolin-cisplatin group was given both taxifolin and cisplatin. After 14 days, biomarkers of kidney damage were measured in blood and tissue samples. Histological examination of kidney tissue was also performed. The results showed that cisplatin increased oxidative stress markers and kidney damage, while taxifolin prevented these effects of cisplatin and reduced kidney damage. The study demonstrated
Objective: To evaluate the results of the effect of nebivolol on tibial bone defect and graft application in new bone development in the rat.
Study Design: Thirty Wistar albino rats were divided into 3 groups. In the Control group, tibia bone defect was created without any treatment. In the Defect+ Graft group, allograft treatment was performed by forming a 6 mm tibial bone defect. In the Defect+Graft+ Nebivolol group, alloplastic bone graft was placed in the calvarial bone defect and then nebivolol (0.34 mg/mL solution/day) treatment was intraperitoneally applied for 28 days.
Results: Histopathological examination revealed inflammation in the defect area, congestion in the vessels, degeneration in collagen fibers, and an increase in osteoclast cells. There was an increase in inflammation and blood vessel structure in graft application, and osteoblastic activity matrix formation after reorganization nebivolol application in collagen fibers. Osteonectin expression was positive in the collagen fiber and matrix, starting in the Graft group, in osteoblasts, whereas in the Nebivolol group, osteoblasts increased in osteocytes and new bone formation.
Conclusion: Nebivolol is thought to have a positive effect on osteoinductive bone growth factors and contribute to the cell-matrix interaction, in addition to the supporting effect of the graft with its antioxidative effect.
Keywords: allograft; bone; bone regeneration; disease models, animal; nebivolol; orthopedic procedures; osteonectin; rats; tibia; tibial defect
The document discusses the anti-tumor activity of the ethanolic extract of Epipremnum aureum (Money Plant) leaves. It aims to evaluate the anti-tumor effect of the extract against Dalton's lymphoma in mice. The methodology involves preparation of the ethanolic extract, acute toxicity testing in mice, in vitro MTT and trypan blue assays on DAL cell lines, and in vivo anticancer studies using DAL tumor-induced mice models. Preliminary phytochemical screening showed the presence of carbohydrates, alkaloids, flavonoids, tannins and other compounds in the extract. In vitro antioxidant assays showed good nitric oxide and DPPH radical scavenging activity of the extract.
Protandim: PubMed.Gov Clinical Studies and MoreLifeVantage
This document summarizes 5 peer-reviewed studies on the effects of the dietary supplement Protandim. The studies found that Protandim:
1) Increased antioxidant enzymes SOD and catalase in humans, reducing oxidative stress by 40-70% within 30-120 days.
2) Prevented skin cancer in mice - 33% developed no cancer at all and the rest developed less aggressive cancers with fewer tumors.
3) Synergistically increased the antioxidant glutathione by 300% in 30 days through upregulating Nrf2 pathways.
4) Protected rat hearts from failure in a model of lung disease by reducing fibrosis and preserving heart function.
5) Improved markers of oxidative
This study examined the effects of desloratadine on ovarian ischemia-reperfusion injury in rats. Rats were divided into three groups: an ischemia-reperfusion injury group, an ischemia-reperfusion injury group treated with desloratadine, and a sham group. Ovarian tissue was analyzed for markers of oxidative stress and inflammation after ischemia and reperfusion. Results showed that desloratadine significantly reduced oxidative stress markers like MDA and increased antioxidant markers like GSH compared to the ischemia-reperfusion injury group. Desloratadine also decreased levels of proinflammatory cytokines like NF-κB, IL-1β, and TNF-α. Histological analysis revealed that desl
International Journal of Engineering and Science Invention (IJESI)inventionjournals
International Journal of Engineering and Science Invention (IJESI) is an international journal intended for professionals and researchers in all fields of computer science and electronics. IJESI publishes research articles and reviews within the whole field Engineering Science and Technology, new teaching methods, assessment, validation and the impact of new technologies and it will continue to provide information on the latest trends and developments in this ever-expanding subject. The publications of papers are selected through double peer reviewed to ensure originality, relevance, and readability. The articles published in our journal can be accessed online.
Cranberry (Vaccinium macrocarpon) protects against doxorubicin-induced cardio...Ahmed Elberry
This document summarizes a research article that studied the protective effects of cranberry extract against doxorubicin-induced cardiotoxicity in rats. The study found that cranberry extract inhibited glutathione depletion and lipid peroxidation caused by doxorubicin in cardiac tissues. It also protected against doxorubicin-induced reductions in the activities of antioxidant enzymes. Cranberry extract alleviated the rise in cardiac injury biomarkers and histopathological changes observed with doxorubicin treatment. The results suggest that cranberry extract has antioxidant properties and can protect against doxorubicin-induced cardiotoxicity in rats.
This research article studied the effects of quercetin (QCT) on experimentally induced diabetes in rats. Rats were divided into three groups: a control group, a diabetic group induced with streptozotocin (STZ), and a QCT-treated group that received QCT before and after STZ induction. Blood glucose levels increased significantly in the diabetic group but decreased in the QCT-treated group. Histological analysis found that STZ caused pancreatic beta cell degeneration and inflammation in the diabetic group. QCT treatment reversed many of these changes in the pancreas and increased beta cell numbers. Immunohistochemistry revealed that STZ increased iNOS and caspase-3, markers of inflammation and apoptosis, while QCT
Screening models for testing of immunological factorsKundlik Rathod
This document discusses screening models for testing immunological factors. It describes both in vitro and in vivo methods. The in vitro methods covered include inhibition of histamine release from mast cells, neutrophil locomotion and chemotaxis assays, and using cell lines like THP-1 monocytes. The in vivo methods covered are using murine models to study humoral antibody response, assessing delayed type hypersensitivity reaction, and measuring macrophage phagocytosis using the carbon clearance test. The goal of these screening models is to test substances that can modulate the immune system.
Anthelmintic activity of Punica granatum ethanol extract against paramphis...researchanimalsciences
Parasitic diseases remain a major threat to livestock production around the
world, particularly in India. Paramphistomosis caused by paramphistomes are one of
the most common and economically important diseases of livestock. The high
incidence of resistance to chemotherapeutics, toxicity and side effects has urged the
necessity of finding alternative plant
-
based anthelmintics against helminth parasites.
Therefore, the present investigation was aimed to assess the anthelmintic effect of
the rind of
Punica granatum
Ethanol Extract (
Pg
EE) against paramphistomes in
infected sheep. Infected sheep were treated orally with 30 and 50 mg/ml
concentrations of
Pg
EE. Eggs Per Gram (EPG) count on faeces, haematological and
biochemical parameters of sheep were investigated. In
Pg
EE
-
treated sheep, the egg
count reduced significantly in the faeces and the reduction was proportional to
dosage and duration after treatment. The maximum reduction (97.95 %) was
observed on day 21 post
-
treatment with 50 mg/ml concentration of
Pg
EE. In infected
sheep, the haemoglobin and protein content were below standard physiological
values. Improvement of haematobiochemical profile was observed in sheep after
treatment with
Pg
EE.
1) The study examined the effects of the inhalation anesthetic isoflurane on muscarinic receptor-mediated excitation and contraction of intestinal smooth muscle.
2) It found that isoflurane strongly inhibited the muscarinic cation current in mouse intestinal cells, reducing carbachol-activated current by 63% and GTPγS-induced current by 44%.
3) Isoflurane also inhibited carbachol-induced contractions of ileum and colon smooth muscle tissues by approximately 30%. The results suggest isoflurane acts by inhibiting muscarinic receptors and G-proteins rather than directly blocking TRPC channels.
The Effect of Atorvastatin (Lipitor) on the Duration of Survival of Allogenei...Nabil Zeidan
Aim: To evaluate the immunomodulatory effect of using non-cholesterol lowering dose
of atorvastatin (AS) on skin allograft survival and on tumor growth in mice.
Study Design: Experimental Study.
Place and Duration of Study: Department of Experimental Pathology, Immunology and
Microbiology, Faculty of Medicine, American University of Beirut; 2011-2012.
Methodology: BALB/c mice were transplanted with skin allografts from C57BL/6 mice
and given either AS alone or in combination with immunosuppressive agents. Average
survival days of skin allografts were recorded and serum levels of interleukin-1β (IL-1β)
and interferon-γ (IFN-γ) were quantified. BALB/c mice and C57BL/6 mice were
challenged intraperitoneally with B16F10 melanoma cancer cells (cancer cell line
syngeneic to C57BL/6 mice) and were then treated with AS. They were observed regularly for tumor growth.
Results: The results indicated that in transplant mice AS given alone or in combination
with immunosuppressive agents prolonged allograft survival time through noncholesterol
lowering mechanisms in spite of a non-significant change in serum cytokine
levels. Furthermore, AS treatment enhanced tumor growth in C57BL/6 mice and
promoted tumor growth in BALB/C mice.
Conclusion: It can be speculated that AS down expresses TLR and modifies MHC
presentation resulting in hindering the generation of an innate and adaptive immune
response.
Hepatoprotective Effect of Cestrum parqui L. aerial parts and Phytochemical ...Jing Zang
This study deals with the investigation of hepatoprotective effect of 70% methanolic extract from Cestrum parqui aerial parts and determination of the bioactive components of the plant. The hepatoprotective effect of Cestrum parqui methanol extract (100, 500, 1000 mg/kg) was analysed on carbon tetrachloride (CCl4)-induced acute liver injury. The administration of a single dose of 40% CCl4 (1ml/kg b.w.) causes an increase in the activities of serum alanine aminotransferase (ALT) and aspirate aminotransferase (AST) enzymes and so pretreated orally of a dose from Cestrum parqui methanol extract (100, 500, 1000 mg/kg) and silymarin (200 mg/kg) for three consecutive days prior to The administration of a single dose of CCl4 significantly prevented the increase in the activities of these enzymes. Histological analysis showed that Cestrum parqui methanol extract at doses of 500 and 1000 mg/kg and silymarin reduced the incidence of liver lesions including vacuole formation, neutrophil infiltration and necrosis of hepatocytes induced by CCl4. The extract cause a negative result on the antioxidative enzymes, superoxide dismutase (SOD), glutathione peroxidase (GPx), glutathione reductase (GRd) and decreased malondialdehyde (MDA) level in liver, as compared to those in the CCl4-treated group and this suggests that the hepatoprotective activity of the extract is due to the antioxidant effect of the extract. Phytochemical analysis of the methanol extract from Cestrum parqui aerial parts showed that it contained different phytoconstituents, flavonoids, tannins, saponins, alkaloids, terpenes and carbohydrates.
The International Journal of Engineering and Science (The IJES)theijes
The International Journal of Engineering & Science is aimed at providing a platform for researchers, engineers, scientists, or educators to publish their original research results, to exchange new ideas, to disseminate information in innovative designs, engineering experiences and technological skills. It is also the Journal's objective to promote engineering and technology education. All papers submitted to the Journal will be blind peer-reviewed. Only original articles will be published.
The papers for publication in The International Journal of Engineering& Science are selected through rigorous peer reviews to ensure originality, timeliness, relevance, and readability.
Genotoxicity of Goji Berry (Lyciumbarbarum) In Vivo Mammalian Cellsinventionjournals
This document summarizes a study that evaluated the genotoxic effects of an aqueous extract of Goji berry (Lyciumbarbarum) using micronucleus and comet assays in rats. Rats were divided into three groups: an experimental group that received 200 mg/kg of the Goji berry extract orally, a positive control group that received cyclophosphamide, and a negative control group. The comet assay showed no significant increase in DNA damage in the experimental group compared to the negative control group at 4 or 24 hours. The micronucleus test also found no significant difference in micronuclei between the experimental and negative control groups for acute or chronic exposure. The results suggest that the Goji berry
This document discusses how nicotine exposure may increase the risk of wet age-related macular degeneration (AMD) through its effects on the retinal pigment epithelium (RPE). The study finds that nicotine increases the ratio of pro-angiogenic vascular endothelial growth factor (VEGF) to anti-angiogenic pigment epithelium-derived factor (PEDF) produced by the RPE, possibly through activation of nicotinic acetylcholine receptors. This shift in growth factors may promote choroidal neovascularization, a key event in wet AMD. The results suggest nicotine exposure from secondhand smoke could play a role in the progression to wet AMD in passive smokers.
This document summarizes the discovery of duplicated VegfA and KDR receptor genes in zebrafish that mediate vascular development. Specifically:
- The researchers identified a duplicated zebrafish VegfA gene (VegfAb) that encodes 171- and 210-amino acid isoforms not found in the single VegfA gene.
- They also found a duplicated KDR receptor gene (Kdrb) that encodes a receptor similar to mammalian KDR.
- Knockdown experiments in zebrafish showed that both VegfAb and the duplicated KDR receptor genes play important roles in vascular development.
- Further experiments demonstrated that the VegfAb isoforms are poorly secreted compared to VegfA isoforms
Objective: To evaluate the antibacterial effects of 4 different cavity disinfectants on Streptococcus mutans, Lactobacillus acidophilus, and Enterococcus faecalis bacteria in different time periods.
Study Design: The antibacterial effects of Cavity Cleanser, Tubulicid Red Label, Chloraxid 2%, and Oxygenated Water cavity disinfectant solutions on E. faecalis (ATCC 29212), S. mutans (ATCC 25175), and L. acidophilus (RSKK 03037) bacterial strains were evaluated by disk diffusion method. In the study where vancomycin antibiogram disc constituted the positive control group, physiological saline solution was used as the negative control group. Standard, sterile, blank antibiogram discs of 5 mm in diameter, in which 15 μL of each material were added, were placed on agar plates at 2.5–3 cm intervals. The inhibition zone diameters formed around the discs that were left to incubate for 24–48 hours at 37°C were measured in millimeters. Statistical analysis of the data was performed using one-way analysis of variance, Kolmogorov-Smirnov, Levene, and Bonferroni tests.
Results: At the end of the study the solutions tested showed a statistically significant antibacterial effect on all bacterial strains used (p<0.05). Cavity Cleanser disinfectant containing 2% chlorhexidine showed the highest antibacterial effect on S. mutans and L. acidophilus, and benzalkonium-containing Tubulicid Red disinfectant on E. faecalis.
Conclusion: The antibacterial effect of all cavity disinfectants used in the study was found to be higher at the end of the 48th hour than at the end of the 24th hour, but there was no statistically significant difference (p>0.05).
Keywords: antibacterial agents; antibacterial effect; cavity disinfectants; chlorhexidine; contamination; dental caries; disinfection; disc diffusion; gram-negative bacteria; gram-positive bacteria
Effect of Gonadotrophin (Pergonal®) on Haematological and Serum Biochemical P...Agriculture Journal IJOEAR
Abstract— Twelve Ouda rams aged 2 – 2.6 years and weighed between 40.21 – 40.32kg were randomly distributed into 3 groups of 4 animals with one ram per replicate in a completely randomized design and used to determine the effect of Pergonal® on haematology and serum biochemistry. These groups were assigned to 3 levels of Pergonal® injection as treatments. The injections were 0.00i.u, 49.50i.u, and 99.00i.u Pergonal® represented as T1 (control), T2, and T3, respectively. All the treatments were administered by intramuscular injections. The injections were divided into three doses each and administered intramuscularly in the thigh for three consecutive days. The results of the study showed that apart from Alanine transaminase and eosinophils, the haematological and serum biochemical parameters and immune status of ouda rams may be affected when 49.50i.u or more of Pergonal are used for induction of spermatogenesis. These parameters should be constantly monitored during pergonal administration in ouda rams.
The study aimed to examine the protective effects of taxifolin on cisplatin-induced kidney damage in rats. Rats were divided into three groups: a healthy control group, a cisplatin group, and a taxifolin-cisplatin group. The cisplatin group was given cisplatin only, while the taxifolin-cisplatin group was given both taxifolin and cisplatin. After 14 days, biomarkers of kidney damage were measured in blood and tissue samples. Histological examination of kidney tissue was also performed. The results showed that cisplatin increased oxidative stress markers and kidney damage, while taxifolin prevented these effects of cisplatin and reduced kidney damage. The study demonstrated
Objective: To evaluate the results of the effect of nebivolol on tibial bone defect and graft application in new bone development in the rat.
Study Design: Thirty Wistar albino rats were divided into 3 groups. In the Control group, tibia bone defect was created without any treatment. In the Defect+ Graft group, allograft treatment was performed by forming a 6 mm tibial bone defect. In the Defect+Graft+ Nebivolol group, alloplastic bone graft was placed in the calvarial bone defect and then nebivolol (0.34 mg/mL solution/day) treatment was intraperitoneally applied for 28 days.
Results: Histopathological examination revealed inflammation in the defect area, congestion in the vessels, degeneration in collagen fibers, and an increase in osteoclast cells. There was an increase in inflammation and blood vessel structure in graft application, and osteoblastic activity matrix formation after reorganization nebivolol application in collagen fibers. Osteonectin expression was positive in the collagen fiber and matrix, starting in the Graft group, in osteoblasts, whereas in the Nebivolol group, osteoblasts increased in osteocytes and new bone formation.
Conclusion: Nebivolol is thought to have a positive effect on osteoinductive bone growth factors and contribute to the cell-matrix interaction, in addition to the supporting effect of the graft with its antioxidative effect.
Keywords: allograft; bone; bone regeneration; disease models, animal; nebivolol; orthopedic procedures; osteonectin; rats; tibia; tibial defect
The document discusses the anti-tumor activity of the ethanolic extract of Epipremnum aureum (Money Plant) leaves. It aims to evaluate the anti-tumor effect of the extract against Dalton's lymphoma in mice. The methodology involves preparation of the ethanolic extract, acute toxicity testing in mice, in vitro MTT and trypan blue assays on DAL cell lines, and in vivo anticancer studies using DAL tumor-induced mice models. Preliminary phytochemical screening showed the presence of carbohydrates, alkaloids, flavonoids, tannins and other compounds in the extract. In vitro antioxidant assays showed good nitric oxide and DPPH radical scavenging activity of the extract.
Protandim: PubMed.Gov Clinical Studies and MoreLifeVantage
This document summarizes 5 peer-reviewed studies on the effects of the dietary supplement Protandim. The studies found that Protandim:
1) Increased antioxidant enzymes SOD and catalase in humans, reducing oxidative stress by 40-70% within 30-120 days.
2) Prevented skin cancer in mice - 33% developed no cancer at all and the rest developed less aggressive cancers with fewer tumors.
3) Synergistically increased the antioxidant glutathione by 300% in 30 days through upregulating Nrf2 pathways.
4) Protected rat hearts from failure in a model of lung disease by reducing fibrosis and preserving heart function.
5) Improved markers of oxidative
This study examined the effects of desloratadine on ovarian ischemia-reperfusion injury in rats. Rats were divided into three groups: an ischemia-reperfusion injury group, an ischemia-reperfusion injury group treated with desloratadine, and a sham group. Ovarian tissue was analyzed for markers of oxidative stress and inflammation after ischemia and reperfusion. Results showed that desloratadine significantly reduced oxidative stress markers like MDA and increased antioxidant markers like GSH compared to the ischemia-reperfusion injury group. Desloratadine also decreased levels of proinflammatory cytokines like NF-κB, IL-1β, and TNF-α. Histological analysis revealed that desl
International Journal of Engineering and Science Invention (IJESI)inventionjournals
International Journal of Engineering and Science Invention (IJESI) is an international journal intended for professionals and researchers in all fields of computer science and electronics. IJESI publishes research articles and reviews within the whole field Engineering Science and Technology, new teaching methods, assessment, validation and the impact of new technologies and it will continue to provide information on the latest trends and developments in this ever-expanding subject. The publications of papers are selected through double peer reviewed to ensure originality, relevance, and readability. The articles published in our journal can be accessed online.
Cranberry (Vaccinium macrocarpon) protects against doxorubicin-induced cardio...Ahmed Elberry
This document summarizes a research article that studied the protective effects of cranberry extract against doxorubicin-induced cardiotoxicity in rats. The study found that cranberry extract inhibited glutathione depletion and lipid peroxidation caused by doxorubicin in cardiac tissues. It also protected against doxorubicin-induced reductions in the activities of antioxidant enzymes. Cranberry extract alleviated the rise in cardiac injury biomarkers and histopathological changes observed with doxorubicin treatment. The results suggest that cranberry extract has antioxidant properties and can protect against doxorubicin-induced cardiotoxicity in rats.
This research article studied the effects of quercetin (QCT) on experimentally induced diabetes in rats. Rats were divided into three groups: a control group, a diabetic group induced with streptozotocin (STZ), and a QCT-treated group that received QCT before and after STZ induction. Blood glucose levels increased significantly in the diabetic group but decreased in the QCT-treated group. Histological analysis found that STZ caused pancreatic beta cell degeneration and inflammation in the diabetic group. QCT treatment reversed many of these changes in the pancreas and increased beta cell numbers. Immunohistochemistry revealed that STZ increased iNOS and caspase-3, markers of inflammation and apoptosis, while QCT
Screening models for testing of immunological factorsKundlik Rathod
This document discusses screening models for testing immunological factors. It describes both in vitro and in vivo methods. The in vitro methods covered include inhibition of histamine release from mast cells, neutrophil locomotion and chemotaxis assays, and using cell lines like THP-1 monocytes. The in vivo methods covered are using murine models to study humoral antibody response, assessing delayed type hypersensitivity reaction, and measuring macrophage phagocytosis using the carbon clearance test. The goal of these screening models is to test substances that can modulate the immune system.
Anthelmintic activity of Punica granatum ethanol extract against paramphis...researchanimalsciences
Parasitic diseases remain a major threat to livestock production around the
world, particularly in India. Paramphistomosis caused by paramphistomes are one of
the most common and economically important diseases of livestock. The high
incidence of resistance to chemotherapeutics, toxicity and side effects has urged the
necessity of finding alternative plant
-
based anthelmintics against helminth parasites.
Therefore, the present investigation was aimed to assess the anthelmintic effect of
the rind of
Punica granatum
Ethanol Extract (
Pg
EE) against paramphistomes in
infected sheep. Infected sheep were treated orally with 30 and 50 mg/ml
concentrations of
Pg
EE. Eggs Per Gram (EPG) count on faeces, haematological and
biochemical parameters of sheep were investigated. In
Pg
EE
-
treated sheep, the egg
count reduced significantly in the faeces and the reduction was proportional to
dosage and duration after treatment. The maximum reduction (97.95 %) was
observed on day 21 post
-
treatment with 50 mg/ml concentration of
Pg
EE. In infected
sheep, the haemoglobin and protein content were below standard physiological
values. Improvement of haematobiochemical profile was observed in sheep after
treatment with
Pg
EE.
1) The study examined the effects of the inhalation anesthetic isoflurane on muscarinic receptor-mediated excitation and contraction of intestinal smooth muscle.
2) It found that isoflurane strongly inhibited the muscarinic cation current in mouse intestinal cells, reducing carbachol-activated current by 63% and GTPγS-induced current by 44%.
3) Isoflurane also inhibited carbachol-induced contractions of ileum and colon smooth muscle tissues by approximately 30%. The results suggest isoflurane acts by inhibiting muscarinic receptors and G-proteins rather than directly blocking TRPC channels.
The Effect of Atorvastatin (Lipitor) on the Duration of Survival of Allogenei...Nabil Zeidan
Aim: To evaluate the immunomodulatory effect of using non-cholesterol lowering dose
of atorvastatin (AS) on skin allograft survival and on tumor growth in mice.
Study Design: Experimental Study.
Place and Duration of Study: Department of Experimental Pathology, Immunology and
Microbiology, Faculty of Medicine, American University of Beirut; 2011-2012.
Methodology: BALB/c mice were transplanted with skin allografts from C57BL/6 mice
and given either AS alone or in combination with immunosuppressive agents. Average
survival days of skin allografts were recorded and serum levels of interleukin-1β (IL-1β)
and interferon-γ (IFN-γ) were quantified. BALB/c mice and C57BL/6 mice were
challenged intraperitoneally with B16F10 melanoma cancer cells (cancer cell line
syngeneic to C57BL/6 mice) and were then treated with AS. They were observed regularly for tumor growth.
Results: The results indicated that in transplant mice AS given alone or in combination
with immunosuppressive agents prolonged allograft survival time through noncholesterol
lowering mechanisms in spite of a non-significant change in serum cytokine
levels. Furthermore, AS treatment enhanced tumor growth in C57BL/6 mice and
promoted tumor growth in BALB/C mice.
Conclusion: It can be speculated that AS down expresses TLR and modifies MHC
presentation resulting in hindering the generation of an innate and adaptive immune
response.
Hepatoprotective Effect of Cestrum parqui L. aerial parts and Phytochemical ...Jing Zang
This study deals with the investigation of hepatoprotective effect of 70% methanolic extract from Cestrum parqui aerial parts and determination of the bioactive components of the plant. The hepatoprotective effect of Cestrum parqui methanol extract (100, 500, 1000 mg/kg) was analysed on carbon tetrachloride (CCl4)-induced acute liver injury. The administration of a single dose of 40% CCl4 (1ml/kg b.w.) causes an increase in the activities of serum alanine aminotransferase (ALT) and aspirate aminotransferase (AST) enzymes and so pretreated orally of a dose from Cestrum parqui methanol extract (100, 500, 1000 mg/kg) and silymarin (200 mg/kg) for three consecutive days prior to The administration of a single dose of CCl4 significantly prevented the increase in the activities of these enzymes. Histological analysis showed that Cestrum parqui methanol extract at doses of 500 and 1000 mg/kg and silymarin reduced the incidence of liver lesions including vacuole formation, neutrophil infiltration and necrosis of hepatocytes induced by CCl4. The extract cause a negative result on the antioxidative enzymes, superoxide dismutase (SOD), glutathione peroxidase (GPx), glutathione reductase (GRd) and decreased malondialdehyde (MDA) level in liver, as compared to those in the CCl4-treated group and this suggests that the hepatoprotective activity of the extract is due to the antioxidant effect of the extract. Phytochemical analysis of the methanol extract from Cestrum parqui aerial parts showed that it contained different phytoconstituents, flavonoids, tannins, saponins, alkaloids, terpenes and carbohydrates.
The International Journal of Engineering and Science (The IJES)theijes
The International Journal of Engineering & Science is aimed at providing a platform for researchers, engineers, scientists, or educators to publish their original research results, to exchange new ideas, to disseminate information in innovative designs, engineering experiences and technological skills. It is also the Journal's objective to promote engineering and technology education. All papers submitted to the Journal will be blind peer-reviewed. Only original articles will be published.
The papers for publication in The International Journal of Engineering& Science are selected through rigorous peer reviews to ensure originality, timeliness, relevance, and readability.
Genotoxicity of Goji Berry (Lyciumbarbarum) In Vivo Mammalian Cellsinventionjournals
This document summarizes a study that evaluated the genotoxic effects of an aqueous extract of Goji berry (Lyciumbarbarum) using micronucleus and comet assays in rats. Rats were divided into three groups: an experimental group that received 200 mg/kg of the Goji berry extract orally, a positive control group that received cyclophosphamide, and a negative control group. The comet assay showed no significant increase in DNA damage in the experimental group compared to the negative control group at 4 or 24 hours. The micronucleus test also found no significant difference in micronuclei between the experimental and negative control groups for acute or chronic exposure. The results suggest that the Goji berry
This document discusses how nicotine exposure may increase the risk of wet age-related macular degeneration (AMD) through its effects on the retinal pigment epithelium (RPE). The study finds that nicotine increases the ratio of pro-angiogenic vascular endothelial growth factor (VEGF) to anti-angiogenic pigment epithelium-derived factor (PEDF) produced by the RPE, possibly through activation of nicotinic acetylcholine receptors. This shift in growth factors may promote choroidal neovascularization, a key event in wet AMD. The results suggest nicotine exposure from secondhand smoke could play a role in the progression to wet AMD in passive smokers.
This document summarizes the discovery of duplicated VegfA and KDR receptor genes in zebrafish that mediate vascular development. Specifically:
- The researchers identified a duplicated zebrafish VegfA gene (VegfAb) that encodes 171- and 210-amino acid isoforms not found in the single VegfA gene.
- They also found a duplicated KDR receptor gene (Kdrb) that encodes a receptor similar to mammalian KDR.
- Knockdown experiments in zebrafish showed that both VegfAb and the duplicated KDR receptor genes play important roles in vascular development.
- Further experiments demonstrated that the VegfAb isoforms are poorly secreted compared to VegfA isoforms
Complement and coagulation 2014 Captsone (formatted)Matt Gerace
1) Shiga toxin-producing E. coli infection can cause hemolytic uremic syndrome (HUS), a thrombotic microangiopathy characterized by low platelets, anemia, and kidney failure.
2) Shiga toxin damages endothelial cells, causing them to express tissue factor and cytokines that promote coagulation, leading to microvascular thrombosis.
3) Complement system activation, especially via the alternative pathway, is amplified by endothelial damage and augments the prothrombotic and inflammatory response, worsening the pathogenesis of HUS.
Biomaterials in oral and maxillofacial surgery /oral surgery courses by ...Indian dental academy
This document provides information about a seminar on biomaterials in oral and maxillofacial surgery presented by Dr. M. Prudhvi Raj. It discusses the introduction and definitions of biomaterials, selection criteria for biomedical materials, and common classes of biomaterials including metals, polymers, and ceramics. Specifically, it describes commonly used metallic biomaterials such as stainless steel, cobalt-chromium alloys, and titanium alloys; highlighting their compositions and properties.
A dental implant (also known as an endosseous implant or fixture) is a surgical component that interfaces with the bone of the jaw or skull to support a dental prosthesis such as a crown, bridge, denture, facial prosthesis or to act as an orthodontic anchor. The basis for modern dental implants is a biologic process called osseointegration where materials, such as titanium, form an intimate bond to bone.
We are going to discuss the four Biomaterials and their Dental Applications, the Advantages and Disadvantages of each Material.
Indian Dental Academy: will be one of the most relevant and exciting training
center with best faculty and flexible training programs for dental
professionals who wish to advance in their dental practice,Offers certified
courses in Dental implants,Orthodontics,Endodontics,Cosmetic Dentistry,
Prosthetic Dentistry, Periodontics and General Dentistry.
Real time PCR, also known as quantitative PCR or qPCR, allows for both the amplification and simultaneous quantification of targeted DNA sequences. It works by detecting amplified DNA in real time as the reaction progresses, rather than just at the end, as in standard PCR. There are two main methods for detection - using non-specific fluorescent dyes that bind to any double-stranded DNA, or using sequence-specific fluorescent probes. Real time PCR is commonly used for diagnostic applications to detect infectious diseases and cancers, as well as basic research applications to quantify gene expression levels.
Real Time PCR allows for detection and quantification of DNA as amplification occurs. It monitors fluorescence at each cycle to measure DNA accumulation. There are two main types of instrumentation - two-step qRT-PCR which involves reverse transcription followed by PCR, and one-step which combines these steps. Detection relies on fluorescent dyes like SYBR Green or target-specific Taqman probes. Real Time PCR provides advantages over conventional PCR like not requiring gels and being faster and less complex for quantification.
DNA amplification techniques include in vivo cloning and in vitro PCR. PCR was independently proposed in the 1970s and 1980s and allows selective amplification of DNA segments using a thermostable DNA polymerase. Key components of PCR include a template DNA, primers, DNA polymerase, nucleotides, and magnesium. During cycling, the DNA is denatured, primers anneal, and the polymerase extends the DNA. PCR has revolutionized molecular biology due to its ability to rapidly amplify specific DNA regions.
The document discusses biomaterials, which are materials used in medical applications that interact with biological systems. It defines biomaterials and outlines their history, characteristics, examples of applications like implants and grafts, challenges, and future potential. Key biomaterial properties include biocompatibility, mechanical compatibility with tissues, and ability to perform specific functions. Common biomaterials are metals, ceramics, polymers, and composites used in devices like heart valves, dental implants, and orthopedic implants.
PCR is a technique for amplifying DNA sequences. It requires template DNA, reaction buffer, magnesium ions, dNTPs, primers, and DNA polymerase. Variations include colony PCR, nested PCR, and real-time PCR, which uses fluorescent probes to detect amplification in real time. Common probe types are SYBR Green dyes, TaqMan probes, molecular beacons, and hybridization probes, which use FRET between donor and acceptor dyes. Real-time PCR instruments contain excitation sources and fluorometers to detect fluorescence levels during thermal cycling.
The document discusses enzyme-linked immunosorbent assay (ELISA), a technique used to detect substances like proteins. ELISA uses an enzyme to detect the binding of antibodies to antigens, producing a color change that indicates the presence of the antibody-antigen complex. There are direct and indirect ELISA methods, as well as variations like immobilized antigen ELISA for antibody detection and sandwich ELISA for antigen detection. ELISA has applications in medical diagnostics to detect antibodies in patients and test for substances like allergens in food.
A detailed description about the basic steps involved in the - PCR - Polymerase Chain Reaction, its applications,its limitations and steps to overcome it.
This document provides an overview of biomaterials used in implants. It begins with the historical background of implant materials and then classifies biomaterials according to their composition, including metals, ceramics, polymers and composites. Key properties for implant materials are discussed, including bulk properties like strength and elastic modulus, as well as surface properties like biocompatibility and corrosion resistance. Specific biomaterials are then described in more detail, including titanium, titanium alloys, cobalt-chromium alloys, and calcium phosphate ceramics. The document concludes by discussing surface characterization and preparation of biomaterials.
ELISA (enzyme-linked immunosorbent assay) is a biochemical technique used to detect the presence of antibodies and antigens in a liquid sample. It relies on an enzyme-linked antibody or antigen to detect the target protein. There are different types of ELISA including direct, indirect, sandwich, and competitive. The ELISA process involves coating a plate with an antigen or antibody, adding a sample and enzyme-linked antibody, washing unbound material, and detecting the enzyme's product to quantify the target. ELISAs are widely used in medical testing, food safety, and disease detection.
The ELISA (enzyme-linked immunosorbent assay) is a popular biochemistry assay that uses antibodies and color change to identify a substance. It involves using an enzyme-linked antibody to detect antigen-antibody binding, where the enzyme converts a colorless substrate into a colored product. There are several types of ELISA including indirect, direct, sandwich, and competitive ELISA. ELISA has various applications such as screening blood donations, measuring hormone levels, and detecting infections and allergens.
This document summarizes a study that investigated the histological effects of pre-exposure prophylactic consumption of sulfonamide drugs on the livers and kidneys of albino rats. Rats were divided into groups that received graded doses of Laridox(SP) for 21 days. Higher doses caused dullness, restlessness and weight loss in rats. Upon examination, livers and kidneys of rats that received higher doses showed inflammatory cell infiltration, congestion, and signs of necrosis compared to controls. The study suggests that long term pre-exposure to higher doses of sulfonamide drugs can cause cellular defects and adverse effects on the liver and kidneys.
This document summarizes a study that investigated the histological effects of pre-exposure prophylactic consumption of sulfonamide drugs on the livers and kidneys of albino rats. Rats were divided into groups that received graded doses of Laridox(SP) for 21 days. Higher doses caused dullness, restlessness and weight loss in rats. Upon examination, livers and kidneys of rats that received higher doses showed inflammatory cell infiltration, congestion, and signs of necrosis compared to controls. The study suggests that long term pre-exposure to higher doses of sulfonamide drugs can cause cellular defects and adverse effects on the liver and kidneys.
Histological effects of pre-exposure prophylactic consumption of sulfa drugs ...IOSR Journals
This document summarizes a study that investigated the histological effects of pre-exposure prophylactic consumption of sulfonamide drugs on the livers and kidneys of albino rats. Rats were divided into groups that received graded doses of Laridox(SP) for 21 days. Higher doses caused dullness, restlessness and weight loss in rats. Upon examination, livers and kidneys of rats that received higher doses showed inflammatory cell infiltration, congestion, and signs of necrosis compared to controls. The study suggests that long term pre-exposure to higher doses of sulfonamide drugs can cause cellular defects and adverse effects on the liver and kidneys.
1) Cigarette smoke exposure in rats led to increased airway hyperresponsiveness and lung inflammation, as shown by elevated levels of leukocytes, neutrophils, and macrophages in the bronchoalveolar lavage fluid.
2) Treatment with eucalyptol reduced airway hyperresponsiveness in cigarette smoke-exposed rats, as demonstrated by decreased contractions of tracheal rings and improved lung function.
3) Eucalyptol also reduced cigarette smoke-induced lung inflammation by decreasing the influx of leukocytes, neutrophils, and macrophages into the bronchoalveolar lavage fluid by over 70%.
ANTI-INFLAMMATORY AND ANALGESIC EFFECTS OF METHANOLIC EXTRACT OF Afrofritomia...paperpublications3
Abstract: Methanolic extract of the leaf of Afrofritomia sylvestris was investigated for its anti-inflammatory and analgesic effects. The extract was evaluated using carragenaan-induced paw oedema in rats (anti-inflammatory effect) as well as acetic acid-induced writhing (analgesic effect) in mice, after intra-peritoneal injection of the extract (250mg/kg, 500mg/kg and 1000mg/kg). The negative control animals were given normal saline (10ml/kg) and the effects were compared with that of Acetylsalicylic acid (100mg/kg), as a positive control drug. Each experiment consisted of twenty five animals divided into 5 groups of 5 animals each. Tail immersion reaction time and Naloxone antagonism of the extracts and morphine were further used to investigate the mode of action of the analgesic activity of the leaf. The extract significantly inhibited carageenan-induced hind paw inflammation in rats (P<0.05-0.01)><0.01). The methanolic extract failed to raise the pain threshold of mice towards heat stimulus and Naloxone did not show any significant antagonism (blocking effect) against the extract in the tail immersion experiment, thus ruling out the involvement of opioid receptors in the mechanism of analgesic action of the extract. Phytochemical analyses of the plant show the presence of flavonoids, alkaloids, saponins, tannins, steroids, triterpenes and cyanogenic glycosides. The LD50 of the extract was determined to be 3050+223.65mg/kg using the method of Tainter and Miller.In this study, methanolic extract of Afrofritomia sylvestris leaf was found to possess significant anti-inflammatory and analgesic effects in the tested models.
Sodium Thiosulfate (Hydrogen Sulfide Donor): Ameliorates the Pituitary-testic...BRNSSPublicationHubI
This study investigated the protective effects of sodium thiosulfate (STS) on the pituitary-testicular axis dysfunction caused by cyclophosphamide (CYP) and/or ionizing gamma radiation (IR) in rats. Rats received STS before and during treatment with CYP and/or IR, while control groups received CYP and/or IR only. STS significantly reduced oxidative stress in the pituitary gland and testes by lowering malondialdehyde and increasing antioxidant enzyme activities. It also elevated reduced luteinizing hormone, follicle-stimulating hormone, and testosterone levels. Furthermore, STS reduced pathological changes and apoptosis in the pituitary and testes induced by CYP and/or IR. This study demonstrates
Anti-Inflammatory Effect Of Mastruz (Chenopodium Ambrosioides) Extract In Res...inventionjournals
Acute Respiratory Distress Syndrome (ARDS) is a respiratory failure acute onset, with bilateral pulmonary infiltrate on chest X-ray and diffuse alveolar damage to pathology, developing non-cardiogenic pulmonary edema. Chenopodium ambrosioides known for its healing effect, anti-asthmatic, anti-inflammatory and respiratory stimulant. The objective is to analyze the improvement of respiratory function with inhalation of Chenopodium ambrosioides extract. Fifteen rats were used of the species Rattus norvegicus. The animals were divided into 3 groups of 5 animals each, the sham group, treated group and the false-operated group. ARDS was induced by the ischemia-reperfusion method of the mesenteric artery in the first two groups, with subsequent inhalation of alcoholic extract of mastruz by the treated group. After 90 minutes, the rats were euthanized and the lungs were removed for histological and morphological analysis. Treatment with alcoholic extract of mastruz led to decreased lung inflammation induced by I/R, since the group treated with inhalation of the extract showed less inflammatory cells in the lung parenchyma compared to the sham group (p <0.05). It is suggested that the alcoholic extract of mastruz reduces the pulmonary inflammatory response and consequently the syndrome of acute respiratory distress arising from the systemic action induced by I / R.
IOSR Journal of Pharmacy (IOSRPHR), www.iosrphr.org, call for paper, research...iosrphr_editor
This study compared the broncho-relaxant effects of Nigella sativa (black seeds) and Anthemis nobilis (chamomile) in patients with chronic bronchial asthma. 54 patients were divided into 3 groups - one received prednisolone (positive control), one received chamomile inhalation, and one received black seed inhalation, daily for 3 weeks. Pulmonary function tests and serum electrolyte levels were measured before and after. The results showed that both plants significantly improved pulmonary function test values and serum electrolyte levels, but black seeds showed greater improvement in symptoms compared to chamomile. The study concluded that black seeds were superior to chamomile for treating chronic bronchial asthma
The IOSR Journal of Pharmacy (IOSRPHR) is an open access online & offline peer reviewed international journal, which publishes innovative research papers, reviews, mini-reviews, short communications and notes dealing with Pharmaceutical Sciences( Pharmaceutical Technology, Pharmaceutics, Biopharmaceutics, Pharmacokinetics, Pharmaceutical/Medicinal Chemistry, Computational Chemistry and Molecular Drug Design, Pharmacognosy & Phytochemistry, Pharmacology, Pharmaceutical Analysis, Pharmacy Practice, Clinical and Hospital Pharmacy, Cell Biology, Genomics and Proteomics, Pharmacogenomics, Bioinformatics and Biotechnology of Pharmaceutical Interest........more details on Aim & Scope).
All manuscripts are subject to rapid peer review. Those of high quality (not previously published and not under consideration for publication in another journal) will be published without delay.
This document summarizes a study investigating the potential protective role of ivermectin in acute lung injury (ALI) using lipopolysaccharide (LPS)- or bleomycin (BLM)-induced mouse models. The study found that ivermectin administration at doses of 1-2 mg/kg preserved alveolar structure and reduced inflammation, hemorrhage, and edema in the lungs of LPS- or BLM-treated mice. Ivermectin also inhibited neutrophil infiltration, myeloperoxidase activity, and phosphorylation of JNK and p38 MAPK proteins involved in inflammation. The results suggest ivermectin has strong anti-inflammatory effects and may help mitigate ALI by
RESEARCH LUNG 01 Potential of rosmarinic acid to ameliorate toxic effects of ...AHMED ASHOUR
Abstract
Malathion (MA) is a widely used pesticide in agriculture. It can cause toxicity in dif- ferent organs of the body. Rosmarinic acid (RO) is found in rosemary extract that can be absorbed through gastrointestinal tract mucosa with potent antioxidant, and anti-inflammatory potential. The current study is designed to investigate the poten- tial of RO to protect the lung after MA administration. Forty albino rats were allo- cated equally to four groups. C-group received corn oil. RO-group received RO orally. MA-group received MA. MA-RO-group received RO in addition to MA. After three weeks the lungs were dissected for histopathological and biochemical investigations. MA-group showed manifestations of severe inflammation with inflammatory cells in- filtration in the lung. MA-RO-group showed limited inflammatory cell infiltration. C- group and RO-group appeared with weak anti-survivin immunoreactivity. MA-group showed strong positive immunoreactivity. The reactivity was weakly positive in MA- RO-group. MA-group showed a significant decrease in SP-D gene expression in com- parison to the C-group, in addition, MA-RO-group showed a significant increase in SP-D expression. In conclusion, the current study approves that oral administration of MA causes lung injury as it has inflammatory effects, caused by oxidative stress and reports the potential of RO to protect lung tissue against toxic effects of MA through its anti-inflammatory, antioxidant, and anti-apoptotic potential.
CELLULAR ADAPTATIONS IN THE DIAPHRAGM IN CHRONIC OBSTRUCTIVETeresa Seguro
The document summarizes a study comparing the cellular adaptations in the diaphragm muscle between patients with severe chronic obstructive pulmonary disease (COPD) and healthy control subjects. Biopsy samples of the diaphragm were obtained from 6 COPD patients and 10 controls. Analyses found that the diaphragm of COPD patients had a higher percentage of slow-twitch muscle fibers and slow isoforms of myofibrillar proteins compared to controls. Specifically, the diaphragm of COPD patients had a higher percentage of slow myosin heavy chain I and lower percentages of fast myosin heavy chains IIa and IIb. A similar trend was seen when comparing fiber types using immunohistochemical techniques. These cellular changes
This document discusses various methods for evaluating anti-asthmatic drugs, including both in vitro and in vivo methods. It provides details on common animal models and techniques used. Some key points:
- Asthma is a global health problem affecting 7-10% of the world's population. It is characterized by airway inflammation, obstruction, and hyperresponsiveness.
- Both acute toxicity tests in mice and various assays evaluating effects on isolated organs, cells, and receptors are used to initially screen potential anti-asthmatic drugs in vitro.
- Popular in vivo models include measuring bronchospasm in guinea pigs and studying effects on histamine-induced bronchoconstriction, arachidonic acid responses,
1) The study investigated the effects of gasdermin D on pyroptosis in a mouse model of sepsis-induced acute kidney injury.
2) The results showed that gasdermin D expression was increased in mice with sepsis-induced acute kidney injury and promoted inflammation and pyroptosis in kidney cells.
3) Downregulating gasdermin D decreased inflammation and pyroptosis, and the NLRP3 inflammasome was identified as an important target of gasdermin D in mediating inflammation during sepsis-induced acute kidney injury.
This document summarizes the diagnosis and prevention of chronic respiratory disease (CRD) caused by Mycoplasma gallisepticum infection in chickens in Japan. It describes how the disease spread throughout Japan in the 1960s following the development of the poultry industry. Diagnosis involves isolating M. gallisepticum through culture or detecting antibodies through agglutination or hemagglutination inhibition tests. Prevention efforts include using antibiotics like tylosin, implementing sanitary measures and eradication programs on farms, and developing clean breeding flocks free of the disease.
This document summarizes a study that tested the protective efficacy of anti-Aspergillus fumigatus IgY antibodies in Cyclosporine A treated mice. Egg-laying hens were immunized with heat-killed A. fumigatus to produce IgY antibodies in their egg yolks. IgY was extracted from eggs laid before and after immunization. Post-immunization extracts showed higher protein and IgY levels than pre-immunization extracts. When administered to Cyclosporine A treated mice challenged with a lethal dose of A. fumigatus, the post-secondary immunization IgY extract conferred the highest protection, with survival rates of 67%, 50%,
Morphological and functional state of immune organs in rats with experimental...QUESTJOURNAL
This study examined the morphological and functional changes in the immune organs (thymus and spleen) of rats with experimentally induced type 1 diabetes mellitus (DM-1). Rats with DM-1 showed initial pathological changes in these organs, including increased medulla in the thymus and increased white pulp in the spleen, indicating early inflammatory and degenerative processes. Treatment with the phytopreparation BNO 10.30 was found to help restore cell structure in the thymus and spleen by stimulating immune function. The results demonstrate the importance of early detection of immune organ changes in patients with type 1 diabetes.
The Importance Of Animal Uses In AnimalsJessica Lopez
This document discusses using bromophenols as potential therapeutics for treating type 2 diabetes mellitus (T2DM). Bromophenols have been identified as inhibitors of the enzyme tyrosine phosphatase 1B (PTP1B), which is involved in insulin signaling. A series of new bromophenol analogs will be synthesized and tested for PTP1B inhibitory activity using in vitro enzyme assays to elucidate their mechanism of action. Bromophenols occur naturally in marine organisms and have attracted interest as anti-diabetic agents due to their suspected PTP1B inhibitory activity. However, quinone species formed from bromophenols could be toxic, so further study is needed to
Protective Effect of Egyptian Propolis Against Rabbit PasteurellosisBee Healthy Farms
Propolis is known for its protective effects on humans and animals, including improving respiratory conditions. It's also documented to be a very complementary adjuvant with other treatment modalities.
Pasteurella multocida is a well known cause of morbidity and mortality in rabbits. The predominant syndrome is upper respiratory disease or "snuffles." P. multocida is often endemic in rabbit colonies and the acquisition of infection in young rabbits is correlated to the prevalence in adult rabbits.
This study investigated the role of vascular leak-induced thrombin signaling in a mouse model of pulmonary fibrosis. The researchers found that treatment with the direct thrombin inhibitor dabigatran attenuated fibrosis by decreasing PAR1 activation, αvβ6 integrin induction, and TGF-β activation. In contrast, therapeutic anticoagulation with warfarin did not protect against fibrosis or decrease these profibrotic pathways. Blockade of αvβ6 integrin also protected against fibrosis. These findings suggest that vascular leak promotes fibrosis through a thrombin-PAR1-αvβ6-TGF-β signaling axis rather than through coagulation and fibrin deposition itself.
Congenital Agenesis Of The Corpus Callosum With Intracerebral Lipoma And Fron...iosrphr_editor
The IOSR Journal of Pharmacy (IOSRPHR) is an open access online & offline peer reviewed international journal, which publishes innovative research papers, reviews, mini-reviews, short communications and notes dealing with Pharmaceutical Sciences( Pharmaceutical Technology, Pharmaceutics, Biopharmaceutics, Pharmacokinetics, Pharmaceutical/Medicinal Chemistry, Computational Chemistry and Molecular Drug Design, Pharmacognosy & Phytochemistry, Pharmacology, Pharmaceutical Analysis, Pharmacy Practice, Clinical and Hospital Pharmacy, Cell Biology, Genomics and Proteomics, Pharmacogenomics, Bioinformatics and Biotechnology of Pharmaceutical Interest........more details on Aim & Scope).
“Hemodynamic and recovery profile with Dexmedetomidine and Fentanyl in intrac...iosrphr_editor
The IOSR Journal of Pharmacy (IOSRPHR) is an open access online & offline peer reviewed international journal, which publishes innovative research papers, reviews, mini-reviews, short communications and notes dealing with Pharmaceutical Sciences( Pharmaceutical Technology, Pharmaceutics, Biopharmaceutics, Pharmacokinetics, Pharmaceutical/Medicinal Chemistry, Computational Chemistry and Molecular Drug Design, Pharmacognosy & Phytochemistry, Pharmacology, Pharmaceutical Analysis, Pharmacy Practice, Clinical and Hospital Pharmacy, Cell Biology, Genomics and Proteomics, Pharmacogenomics, Bioinformatics and Biotechnology of Pharmaceutical Interest........more details on Aim & Scope).
Correlation of Estrogen and Progesterone Receptor expression in Breast Canceriosrphr_editor
The IOSR Journal of Pharmacy (IOSRPHR) is an open access online & offline peer reviewed international journal, which publishes innovative research papers, reviews, mini-reviews, short communications and notes dealing with Pharmaceutical Sciences( Pharmaceutical Technology, Pharmaceutics, Biopharmaceutics, Pharmacokinetics, Pharmaceutical/Medicinal Chemistry, Computational Chemistry and Molecular Drug Design, Pharmacognosy & Phytochemistry, Pharmacology, Pharmaceutical Analysis, Pharmacy Practice, Clinical and Hospital Pharmacy, Cell Biology, Genomics and Proteomics, Pharmacogenomics, Bioinformatics and Biotechnology of Pharmaceutical Interest........more details on Aim & Scope).
Analytical Study of Urine Samples for Epidemiology of Urinary Tract Infection...iosrphr_editor
The current study was carried out in District Abbottabad aimed to determine the common urinary
tract infections in local community to determine the epidemiology of significant diseases in asymptomatic patients
of renal disorder. In this study a total of 1000 urine samples were examined during 3rd February to 1st April 2015
from patients attending Ayub Teaching Hospital Abbottabad by using dipstick and microscopic analysis of urine.
There were 638 females and 362 males patients examined during this period. The range of age groups is between
1.5 years to 80 years. Results of this study was reported as Pyuria 11%, Proteinuria 21.1%, Hematuria 10.4%,
Epithelial Cells 8.2%, pH 7.8 %, Granular casts 7.3%, Triple phosphate 6.6%, Calcium oxalate 6.4%, Glycosuria
6.3%, Bacteria 6.2% and mucous 4.1%. This study concludes that routing urinalysis should be performed for all
individuals to diagnose the asymptomatic diseases that will help in simple therapeutic measurements as urinalysis
is a simple step to determine the root of Urinary tract disorders.
Chest sonography images in neonatal r.d.s. And proposed gradingiosrphr_editor
BACKGROUND : Lung sonography has been used to monitor the patients of R.D.S. in
N.I.C.U. in recent times.
AIMS : To Describe and Grade the changes of R.D.S. by lung sonography.
SETTING & DESIGN : Tertiary care institutional set up in a rural medical college.
STUDY DURATION : September 2014 to May 2015. Follow-up variable, upto 2 weeks.
PROSPECTIVE, ANALYTICAL STUDY.
MATERIALS AND METHODS -This was a single institute study approved by the institutional ethics
committee. Prior informed consent was obtained from the parents. 100 consecutive patients admitted in
N.I.C.U. WITH gestational age < 36 weeks with respiratory complaints were enrolled. Chest x-ray was
obtained within few hours of admission and lung sonography was performed within 24 hours. Follow – up
sonography was performed as and when necessary. Sonography image was graded and correlated with chest
xray and clinical picture
The Comprehensive Review on Fat Soluble Vitaminsiosrphr_editor
This review article deals with brief description of fat soluble vitamins with figures and tables
showing statistical analytical data duly quoting the references wherever necessary. The word “soluble” actually
means “able to be dissolved.” Whether a vitamin is classified as 'fat-soluble' or 'water-soluble' has to do with
how the vitamin is absorbed, stored and removed from the body. Vitamins are tiny organic compounds with a
huge impact on the health and well-being of the body. The body needs a small amount of fat soluble vitamins in
order to stay in optimal health. Fat soluble vitamins play an important role in keeping the body healthy and
functioning from immune system and muscle and heart function, easy flow and clotting of blood as well as eye
health. They are critical to health and wellness–particularly reproductive health and wellness. Low-fat, no-fat
and vegan diets are woefully lacking in fat soluble vitamins. However a diet based on traditional foods can
naturally provide these vitamins. Science is still learning about many of the functions of vitamins. "Too much
vitamin A, D, or K can lead to increased levels that are unhealthy and can cause serious health consequences.
Diseased conditions leading to decreased fat absorption leads to decreased absorption of vitamins. The fatsoluble
vitamins work most safely and effectively when obtained them from natural foods within the context of a
diet rich in all their synergistic partners. If fat soluble vitamins are stored for lengthy time they generate threat
for toxicity than water soluble vitamins and such situation even aggravated, provided they are consumed in
excess. Vitamin products, above the legal limits are not considered food supplements and must be registered as
prescription or non-prescription (over-the-counter drugs) due to their potential side effects. Vitamin A and E
supplements do not provide health benefits for healthy individuals, instead they may enhance mortality, and it is
held proved that beta-carotene supplements can be harmful to smokers
Sulphasalazine Induced Toxic Epidermal Necrolysis A Case Reportiosrphr_editor
The document describes a case study of an 18-year-old female patient who developed toxic epidermal necrolysis as a severe adverse reaction to the drug sulfasalazine, which she had been taking for ankylosing spondylitis. She was admitted to the intensive care unit and treated with high dose corticosteroids, fluid replacement, and supportive care. She improved with treatment and was discharged with only post-inflammatory hypopigmentation.
Evaluation the efficacy of IVIgG in treatment of Hemolytic Disease of Newborniosrphr_editor
Hemolytic disease of newborn (HDN) is an important cause of hyperbilirubinemia in the
neonatal period,and delayed diagnosis and treatment may lead to permanent brain damage. Traditional
neonatal treatment of HDN is intensive phototherapy and exchange transfusion.Intravenous
immunoglobulin(IVIgG) has been introduced as an alternative therapy to exchange transfusion. This study was
conducted to assess the effect of IVIG in HDN .
FIBROLIPOMATOUS HAMARTOMA OF ULNAR NERVE: A RARE CASE REPORT.iosrphr_editor
Nervous fibrolipomatous hamartoma is said to be a rare tumor-like condition involving the peripheral
nerves,in which the epineurium and perineurium are enlarged and distorted by excess of fatty and fibrous tissue
s that infiltrate between and around nerve boundaries. The median nerve is more likely to develop a hamartoma
than other nerves with a predilection for the carpal tunnel.
A fibrolipomatous hamartoma – is a rare, benign, congenital lesion most commonly found in the median nerve,
usually at the level of the wrist or hand.
We report a case of this rare condition in ulnar nerve.
SELF MEDICATION PRACTICES FOR ORAL HEALTH PROBLEMS AMONG DENTAL PATIENTS IN B...iosrphr_editor
This study examined self-medication practices for oral health problems among dental patients in Bangalore, India. The study found that 100% of the 175 dental patients surveyed practiced self-medication. Toothache was the most common triggering factor reported. Analgesics and herbal remedies were commonly used for self-treatment. Most participants consulted pharmacists for advice on self-medication and would see a dentist only if problems persisted after self-medicating. The high prevalence of self-medication indicates a need for education programs to increase awareness of risks.
Clinico-haematological Profile of Falciparum Malaria in a Rural Hospital of T...iosrphr_editor
Aim: To study the clinico-haematological profile malaria in a rural hospital of Tripura.
Material and methods: A cross-sectional hospital-based study was done from at Kulai District
Hospital,Tripura. This hospital based cross sectional study was done on 60 confirmed cases of falciparum
malaria (either by peripheral smear or rapid diagnostic test) admitted in Kulai District Hospital. A case sheet
proforma was prepared and data (demographic profile,clinical feature, investigation, treatment, and
complication) from all indoor patients was collected and analyzed.
Result: Out of 60 patients, 40(66.6%) were males and 20 (33.4%) were females. Most of the patients were
between the age group 21-40 years with the highest prevalence between the age group of 21-30. Fever was the
most common symptom. Anemia was present in 42(70%) patients, out of which 6(10%) patients had severe
anemia. Thrombocytopenia was present in 36(60%) patients.Abnormal liver function tests were observed in
26(43.3%) subjects while abnormal kidney function tests were observed in16(26.6%) patients. All the 60
patients received Artemisinin based antimalarial drugs.
Conclusion: Early detection, prompt management, and adequate supportive therapy may reduce mortality due
to falciparum cerebral malaria.
Indonesian Wild Ginger (Zingiber sp) Extract: Antibacterial Activity against ...iosrphr_editor
The document summarizes a study that tested the antibacterial activity of extracts from three species of wild ginger plants from Indonesia (Zingiber zerumbet, Zingiber amaricans, and Zingiber aromaticum) against Mycoplasma gallisepticum, a pathogen that causes respiratory disease in chickens. Phytochemical analysis revealed the presence of alkaloids, flavonoids, tannins, and terpenoids in the plant extracts. Disc diffusion and minimum inhibitory concentration assays showed that ethanol extracts of dried rhizomes had the strongest inhibitory effects against the pathogen, with minimum inhibitory concentrations ranging from 7.8 to 31.2 mg/ml. The results suggest that extracts from these wild ginger plants
A case of allergy and food sensitivity: the nasunin, natural color of eggplantiosrphr_editor
Abstract: Allergies and food sensitivities can both be considered as "adverse reactions individualistic" to food.
Are pathological and individual forms because they affect a few individuals in way rather serious; immediate
or delayed reactions occur instead with simple effects histamine, or, in severe cases with respiratory and
anaphylactic shock
The eggplant (Solanum melongena L.) is known to cause food allergies in some Asian countries, but detailed
studies on allergies caused by eggplant are lacking, however, it was highlighted the presence of allergens in
edible parts of eggplant with preponderance in the peel .
The purpose of this study was to propose an extraction method rapid, efficient and cost of natural dye from
waste products from the food industry, such as the peels of eggplant, from which it was extracted, isolated and
purified the nasunin,a colored molecule in red-fuchsia.
Nasusin was tested on 58 patients to evaluate the potential sensitizing effect on the skin. The results demonstrate
that allergenic effects are negligible and therefore the nasunin can be used as a colorant in various industrial
sectors with a certain safety margin
Complete NMR Assignment of MogrosidesII A2, II E andIII A1Isolated from Luo H...iosrphr_editor
NMR analysis allowed complete assignments of three known mogrol glycosides, Mogroside IIA2 (1),
II E (2)and IIIA1 (3), isolated from the extracts of Luo Han Guo. Herein, complete 1H and 13C NMR
assignmentsof all threemogrosidesare described based on NMR experiments (1H NMR, 13C NMR, COSY,
HSQC-DEPT, HMBC, NOESY and 1DTOCSY) and mass spectral data.
Nanoemulsion and Nanoemulgel as a Topical Formulationiosrphr_editor
: Nanoemulsion is referred type of emulsion with uniform and extremely small droplet size in the range
of 20-200 nm. Nanoemulsion provides numerous advantages over other carrier such as polymeric nanoparticle
and liposomes, including low cost preparation procedure, high hydrophilic and lipophilic drug loading system
to enhance the longer shelf live upon preserving the therapeutic agents. Incorporating the preparation of
nanoemulsion with hydrogel matrix to produce nanoemulgel exhibited by the two separate systems that forming
it. Nanoemulgel possesses the properties of thixotropic, non-greasy, effortlessly spreadable, easily be removed,
emollient, not staining, soluble in water, longer shelf life, bio-friendly, translucent and agreeable appearance.
Pharmacokinetics of High-Dose Methotrexate in Egyptian Children with Acute Ly...iosrphr_editor
Aim:Since several factors have been shown to influence the clearance of methotrexate, the purpose of this study
was to identify potential relationships between patient covariates and the methotrexate clearance estimates and
deduce a pharmacokinetic model for the estimation of methotrexate clearance in Egyptian pediatric ALL
patients that may help dosage adjustment and achieve target steady-state plasma concentrations in a similar
sittings.
Patients and methods: A total of 94 pediatric patients with B-cell ALL, of whom 70 were the studied population
and 24 were the test population, were treated with four courses of HDMTX doses 2.5 gm/m2
(low-risk arm) or 5
gm/m2
(standard-/high-risk arm) given every other week by intermittent intravenous infusions over 24 hours as
a part of their treatment protocol. Patients were monitored for the 24 hour MTX concentration and the systemic
methotrexate clearance was calculated for each methotrexate dose
Epidemiology of Tuberculosis (TB) in Albania 1998-2009iosrphr_editor
Abstract : In Albania, many people erroneously think that tuberculosis (TB) is a disease of the past-an illness
that no longer constitutes a public health threat. Surveillance is an integral part of tuberculosis (TB) control.
Albania has a highTB notification rate and there are doubts about underreporting. The evolution of the
incidence of tuberculosis is presented, together with more detailed figures over the period 1998-2009. These
figures were obtained by the monthly forms (called 14/Sh) compared with the individual notification data.
Objective: To examine the distribution and sources of increased tuberculosis (TB) morbidity and reporting
system deficiencies in the Albania from 1998 through 2009. Metodology: The study is descriptive one conductet
during the period 1998-2009. The statistical analysis is based on data reported from regional level (regional
epidemiological departments) to the central level (Public Health Institute). Results: The main findings were:
discordance between the collected data (individual form) and reported data (monthly form); tuberculosis
incidence rate shows little oscillations which ranges from 6.67 to 9.2 cases/100.000 population; 50% of the
regions show a lack of information on the confirmation of diagnosis and laboratory examination type used for
confirmation. Conclusion: TB disease in high-risk populations where it is difficult to detect, diagnose, and treat;
limitations of current control measures and the need for new tests and treatments, including an effective
vaccine; improving information system, regulation of individual form and personnel training.
Total Phenol and Antioxidant from Seed and Peel of Ripe and Unripe of Indones...iosrphr_editor
Study on total phenol and antioxidantactivity ofsugar apple fruits of various solvent, part of fruits, and level of ripening. Solvent extraction used were 80% (v/v) methanol, 50% (v/v) acetone, boiling water, and 50% (v/v) ethanol. Part of fruits thatbeen used for samples were seed and peel which are normally by products of sugar apple processing, level of ripening were unripe, and ripe sugar apple fruits. Total phenol was determined by Folin-ciocalteau method. Total antioxidant was quantified by 1,1-diphenyl-2-picrylhydrazyl(DPPH) method.Therewas a difference in type of solvent, part of fruits, and level of ripeningon total phenol and antioxidant concentration of sugar apple fruits. Seeds have higher total phenol concentration than peels of this fruits. Unripe sugar apple fruits have higher total phenol and antioxidant than ripe fruit. The best solvent for phenol extraction was ethanol 50%butthe best solvent for antioxidant extraction was acetone 50%.
A Review on Step-by-Step Analytical Method Validationiosrphr_editor
When analytical method is utilized to generate results about the characteristics of drug related samples it is essential that the results are trustworthy. They may be utilized as the basis for decisions relating to administering the drug to patients. Analytical method validation required during drug development and manufacturing and these analytical methods are fit for their intended purpose. To comply with the requirements of GMP pharmaceutical industries should have an overall validation policy which documents how validation will be performed. The purpose of this validation is to show that processes involved in the development and manufacture of drug, production and analytical testing can be performed in an effective and reproducible manner. This review article provides guidance on how to perform validation characteristics for the analytical method which are utilized in pharmaceutical analysis.
A Cross Sectional Study of Ethnic Differences in Occurrence and Severity of A...iosrphr_editor
Non-steroidal anti-inflammatory drugs are the most widely used "over the counter" medication all over the world despite their complications in different major organs. Present studies envisaged for knowing the occurrence and severity of adverse drug reactions from NSAIDs in different ethnic communities of Sikkim. A cross sectional study was undertaken in the medicine outpatients department of a secondary and tertiary care hospital. The patients belonging to Nepalese, Bhutias, Lepchas ethnic communities and others community (settlers from other parts of India) were included to analyzed the data based on the age and gender, ethnicity and ADRs, drugs and ADRs. Severity assessment was done using Hartwing and Siegel scale and causality assessment by Naranjo scale. Total 109 cases of ADRs, predominating in female were detected. Nepalese were the most affected and Gastrointestinal tract (GIT) being the most affected organ in them. Diclofenac showed maximum number of ADRs in all the communities. Maximum number of cases occurred on single day use (40.36%) of drugs. All the cases were belonging to the "possible category" and the maximum being the mild (72.48%) in nature. It is advisable to consider the ethnic/racial differences equally with other factors, to improve the safety and efficacy of a drug.
The Children are very vulnerable to get affected with respiratory disease.
In our country, the respiratory Disease conditions are consider as major cause for mortality and Morbidity in Child.
TEST BANK For Brunner and Suddarth's Textbook of Medical-Surgical Nursing, 14...Donc Test
TEST BANK For Brunner and Suddarth's Textbook of Medical-Surgical Nursing, 14th Edition (Hinkle, 2017) Verified Chapter's 1 - 73 Complete.pdf
TEST BANK For Brunner and Suddarth's Textbook of Medical-Surgical Nursing, 14th Edition (Hinkle, 2017) Verified Chapter's 1 - 73 Complete.pdf
TEST BANK For Brunner and Suddarth's Textbook of Medical-Surgical Nursing, 14th Edition (Hinkle, 2017) Verified Chapter's 1 - 73 Complete.pdf
The biomechanics of running involves the study of the mechanical principles underlying running movements. It includes the analysis of the running gait cycle, which consists of the stance phase (foot contact to push-off) and the swing phase (foot lift-off to next contact). Key aspects include kinematics (joint angles and movements, stride length and frequency) and kinetics (forces involved in running, including ground reaction and muscle forces). Understanding these factors helps in improving running performance, optimizing technique, and preventing injuries.
This presentation gives information on the pharmacology of Prostaglandins, Thromboxanes and Leukotrienes i.e. Eicosanoids. Eicosanoids are signaling molecules derived from polyunsaturated fatty acids like arachidonic acid. They are involved in complex control over inflammation, immunity, and the central nervous system. Eicosanoids are synthesized through the enzymatic oxidation of fatty acids by cyclooxygenase and lipoxygenase enzymes. They have short half-lives and act locally through autocrine and paracrine signaling.
- Video recording of this lecture in English language: https://youtu.be/RvdYsTzgQq8
- Video recording of this lecture in Arabic language: https://youtu.be/ECILGWtgZko
- Link to download the book free: https://nephrotube.blogspot.com/p/nephrotube-nephrology-books.html
- Link to NephroTube website: www.NephroTube.com
- Link to NephroTube social media accounts: https://nephrotube.blogspot.com/p/join-nephrotube-on-social-media.html
Can Traditional Chinese Medicine Treat Blocked Fallopian Tubes.pptxFFragrant
There are many traditional Chinese medicine therapies to treat blocked fallopian tubes. And herbal medicine Fuyan Pill is one of the more effective choices.
Milan J. Anadkat, MD, and Dale V. Reisner discuss generalized pustular psoriasis in this CME activity titled "Supporting Patient-Centered Care in Generalized Pustular Psoriasis: Communications Strategies to Improve Shared Decision-Making." For the full presentation, please visit us at www.peervoice.com/HUM870.
Allopurinol, a uric acid synthesis inhibitor acts by inhibiting Xanthine oxidase competitively as well as non- competitively, Whereas Oxypurinol is a non-competitive inhibitor of xanthine oxidase.
Nutritional deficiency Disorder are problems in india.
It is very important to learn about Indian child's nutritional parameters as well the Disease related to alteration in their Nutrition.
Nano-gold for Cancer Therapy chemistry investigatory projectSIVAVINAYAKPK
chemistry investigatory project
The development of nanogold-based cancer therapy could revolutionize oncology by providing a more targeted, less invasive treatment option. This project contributes to the growing body of research aimed at harnessing nanotechnology for medical applications, paving the way for future clinical trials and potential commercial applications.
Cancer remains one of the leading causes of death worldwide, prompting the need for innovative treatment methods. Nanotechnology offers promising new approaches, including the use of gold nanoparticles (nanogold) for targeted cancer therapy. Nanogold particles possess unique physical and chemical properties that make them suitable for drug delivery, imaging, and photothermal therapy.
1. IOSR Journal Of Pharmacy
(e)-ISSN: 2250-3013, (p)-ISSN: 2319-4219
Www.Iosrphr.Org Volume 3, Issue 4 (May 2013), Pp 38-47
38
Role of irbesartan in protection against pulmonary toxicity
induced by bleomycin in rats
Mariam A. El-Gamal1
, Sawsan A. Zaitone 2
, and Yasser M. Moustafa 2
1
(Directorate of health and population, Port Said, Egypt)
2
(Department of Pharmacology & Toxicology, Faculty of Pharmacy, Suez Canal University, Ismailia 41522,
Egypt)
Abstract : Bleomycin (BLM) is an anti-neoplastic, antibiotic drug that produces dose and time dependant
pulmonary fibrosis. Recent studies reported some mechanisms of irbesartan in attenuating lung and skin
fibrosis in mice. Therefore, the current study was conducted to examine the effect of irbesartan focusing on
angiogenesis and plasminogen activator inhibitor-1(PAI-1) gene expression as possible mechanisms in
protection against BLM-induced lung fibrosis in rats. The effect of irbesartan on the serum and tissue levels of
growth factors and mRNA expression of PAI-1 were studied. Oral administration of irbesartan (10, 20 and 40
mg/kg/day) to rats for 21 days, starting from the first day of bleomycin injection (10 mg/kg/day/10 days, i.p.)
attenuated the severity of BLM-induced pulmonary fibrosis, enhanced the histopathological features of the
lungs, reduced serum transforming growth factor-β1 (TGF-β1) compared to BLM group without any
improvement in the survival percentage. In addition, immunohistochemical staining revealed lower expression
of angiotensin-II type 1 receptor (AT1) and α-smooth muscle actin (α-SMA) in lung tissues after treatment with
irbesartan (20 and 40mg/kg) compared to BLM-treated group. Importantly, irbesartan (10, 20 and 40mg/kg)
suppressed the expression of PAI-1 gene in lung tissues while increased both serum level and
immunohistochemical staining of vascular endothelial growth factor (VEGF) compared to BLM-treated group.
So that, the present study concluded that the ameliorating effect of irbesartan against BLM-induced pulmonary
fibrosis in rats involves increasing angiogenesis, reduction of PAI-1 gene expression and modulation of growth
factors.
Keywords - Angiogenesis, bleomycin, irbesartan, plasminogen activator inhibitor-1, pulmonary fibrosis.
I. INTRODUCTION
Pulmonary fibrosis is a chronic end stage of interstitial lung diseases which progress to complete loss
of lung function and death in affected patients [1]. Pulmonary fibrosis characterized by the histological pattern
of usual interstitial pneumonia [2] with excessive accumulation of extracellular matrix (ECM), fibroblast
proliferation and remodeling of the lung architecture. In the current study, pulmonary fibrosis was induced in
rats by i.p injection of bleomycin, an antibiotic drug with anti-neoplastic activity which was originally isolated
from the fungus Streptomyces verticillus [3].The bleomycin induces pulmonary fibrosis which produces
pathological events similar to those found in human fibrotic lung disease [4].
Angiotensin-II is the main peptide of renin-angiotensin system that regulates cell growth, vessel
growth, inflammation and fibrosis via acting through AT1receptors [5]. Some of the angiotensin-II effects have
been linked to the induction of cytokines like TNF-α, a pro-inflammatory factor which activates other
inflammatory cytokines, and growth factors expression as TGF-β1[6], a major pro-fibrogenic mediator
increases the production and secretion of collagen and induces production and differentiation of lung
fibroblasts in vitro, and VEGF [7], pro-angiogenic factor which is involved in endothelial cell proliferation,
inflammation and angiogenesis, the formation of new vessels from preexisting blood vessels. As angiogenesis
plays a critical role in pathologic and physiologic responses and can improve the severity of various diseases.
Angiotensin-II is also involved in activating PAI-1 [8]. PAI-1 is a member of the serine protease inhibitor
family, and is the major physiological inhibitor of both tissue and urokinase plasminogen activators [9]. PAI-1
reduces the conversion of plasminogen to plasmin, an extracellular protease that mediates fibrinolysis [10] and
results in ECM deposition and fibrosis.
Irbesartan is a potent selective AT1 receptor antagonist that shows high affinity to AT1 receptors and
serves as an anti-hypertensive drug [11]. Recent studies reported the ameliorating effect of irbesartan on
fibrotic lung [12] and skin [13] in mice. So that, this study was conducted to evaluate the protective role of
irbesartan in rats against lung fibrosis induced by bleomycin focusing on its effect on angiogenesis and PAI-1
as possible mechanisms could be involved in lung fibrosis induced by bleomycin in rats.
2. Role of irbesartan in protection against pulmonary toxicity induced by bleomycin in rats
39
II. MATERIALS AND METHODS
1.1. Animals
Sixty male albino rats weighing about 200-250 g were supplied by the Egyptian Organization for
Biological Products and Vaccines (Vacsera, Egypt). Rats were housed in groups of six, 10 animals each and
maintained under standard conditions (normal light/dark cycle, temperature 25 ± 3 °C and 55% relative
humidity) with free access to water and rodent laboratory food. Rats were acclimatized to the new environment
for 1 week prior to the experiment. All the experimental protocols were approved by the Animal Care and Use
Committee at the Faculty of Pharmacy, Suez Canal University.
1.2. Drugs and chemicals
Bleomycin hydrochloride (Nippon Kayaku, Tokyo, Japan) was freshly prepared in phosphate buffered
saline solution (PBS, pH = 7.4). Irbesartan powder was kindly provided by Medical Union Pharmaceutical Co.
(Ismailia, Egypt). 3̍, 3̍-diaminobenzidine (DAB) was purchased from Sigma-Aldrich®
(MO, USA). All other
chemicals used in the present study were of analytical grade and obtained from Adwic Co. (Cairo, Egypt).
1.3. Experimental design
Rats were randomly allocated into six groups: Group I: rats were injected with PBS (Vehicle of BLM)
in a volume of (3ml/kg/day/10 days, i.p.) parallel to BLM injection.
Group II: rats were injected with BLM (10 mg/kg/day/10 days, i.p.) to induce lung fibrosis. Group III, IV and
V: rats were injected with BLM (10 mg/kg/day/10 days, i.p.) in addition to oral irbesartan-starting from the
first day of BLM injection- at doses of (10, 20 and 40 mg/kg/day/21 days) in volumes of (1,2 and 3 ml/kg),
respectively. Group VI: healthy rats were injected with PBS (vehicle of BLM, 3 ml/kg/day/10 days, i.p.) in
addition to oral irbesartan (40 mg/kg/day/21 days) in a volume of (3ml/kg). This group was performed to
explore any toxic effect of irbesartan on the lung. The experiment continued up to 21 days. In general, BLM
was freshly prepared in PBS and the concentration was adjusted so that, each rat received 3ml/kg body weight.
Irbesartan powder was freshly prepared in 2 % CMC solution and given by gastric gavages. The animals were
weighed at the beginning, through, and at the end of experiments.
1.4. Blood collection, lung coefficient and tissue samples
At the end of the study protocol, a 2ml blood sample was obtained under anesthesia from the orbital
sinus. Thirty min after collection, blood samples were processed by centrifugation at 2000 × g for 15 min.
Then, serum samples were separated and stored at -80°C for different assays.
Rats were sacrificed and the lungs were excised, rinsed with ice-cold PBS and weighed to calculate the ratio of
lung weight to body weight as lung coefficient [14]. These ratios indicated lung inflammation and fibrosis.
Then, the lungs were divided; the right lung was kept at -80ºC whereas, the left lung was fixed using 10%
phosphate-buffered paraformaldehyde solution (pH = 7.4) for 18 h and then embedded in paraffin. After that,
all tissues were sectioned at 4 μm thicknesses and left to dry over night at 37°C. Sections were then subjected
to deparaffinized, rehydration and prepared for histological or immunohistochemical staining for AT1, α-SMA
and VEGF.
1.5. Measurement of serum TNF-α, TGF-β1 and VEGF levels using ELISA kits
Enzyme-linked immunosorbent assay kits for detection of serum TNF-α and VEGF levels (Ray
Biotech Inc®
, Norcross, USA) and for serum TGF-β1 level (Boster Biological technology®
, Wuhan, China),
were carried out following the instructions of manufacturer using an automated ELISA reader (Europe S.A.,
Belgium).
1.6. Histopathological examination of the lung tissues
Tissues stained with Masson‟s trichrome stain (Sigma-Aldrich Co., MO, USA) to assess the degree of
fibrosis. For the quantitative histological analysis, a numerical fibrotic scale was used „„Ashcroft score‟‟ [15].
Briefly, two pathologists scored the grade of lung fibrosis in blinded fashion on a scale of 0-8 by examining six
randomly chosen fields per sample. The scoring was performed at high power (× 40 magnification). The
criteria for grading lung fibrosis were as follows: grade (0): normal lung; grade (1): minimal fibrous thickening
of alveolar or bronchiolar walls; grade (2–3): moderate thickening of walls without obvious damage to lung
architecture; grade (4–5): increased fibrosis with definite damage to lung structure and formation of fibrous
bands or small fibrous masses; grade (6–7): severe distortion of structure and large fibrous areas; and grade (8):
total fibrous obliteration of fields. The mean score of all fields was taken as the fibrosis score of that lung
section.
3. Role of irbesartan in protection against pulmonary toxicity induced by bleomycin in rats
40
1.7. Immunohistochemical staining and image analysis
Immunostaining was performed using streptavidin–biotin–immunoperoxidase complex method with 4
μm thick sections, which had been deparaffinized, hydrated and heated in 0.01 M citrate buffer solution (pH =
6.0) for antigen retrieval. Sections were incubated with corresponding primary antibody, mouse monoclonal
antibodies against AT1 receptors (Abcam®
, Cambridge, CB40FL, UK) and mouse monoclonal antibodies
against α-SMA and VEGF (Labvision®
, Fremont, CA 94538, USA) at 4°C overnight. After conjugation with
streptavidin–biotin–peroxidase complex, coloring was performed with DAB as chromogen and Mayer's
hematoxylin was used as counter stain. Slides were examined blindly by an experienced pathologist using a
light microscope (Olympus CX21, Japan). Photomicrographs captured at x 100 magnification.
Immunoreactivity for AT1, α-SMA and VEGF was evaluated with reference to the optical density of the stain
using an image analysis system “Image J 1.45F” (National Institute of Health, USA). The optical density was
determined on ten consecutive sections representative to the whole tissue section.
1.8. Quantitative reverse transcription–polymerase chain reaction
Total RNA was extracted from frozen lung tissue samples (100 mg) using an RNA extraction kit
(Qiagen, Hilden, Germany) and treated with DNase to remove any residual genomic DNA. The concentration
of the RNA extracted was measured using a NanoDrop ND-1000 (Thermo Fisher Scientific, Wilmington, DE,
USA). Single-stranded cDNA was synthesized from 5 to 10 µg total RNA using Superscript II Reverse
Transcriptase (Gibco BRL; Life Technologies, Bethesda, MD, USA). To determine PAI-1 in lung tissue, the
following specific primers were used: rat PAI-1 cDNA fragment, 5ˊ-AGCTGGGCATGACTGACATCT-3ˊ
(primer 1) and 5ˊ-GCTGCTCTTGGTCGGAAAGA-3ˊ (primer 2); and β-actin, 5ˊ-
TTCAACACCCCAGCCATGT-3ˊ (sense) and 5ˊ-AGTGGTACGACCAGAGGCATACA-3ˊ (antisense) [16].
All primers were used at a final concentration of 0.5 µmol/L. Quantification of transcripts was performed with
the Light Cycler 480 Real-Time PCR System (Roche Diagnostics, Mannheim, Germany) and target sequences
were detected using the Universal Probe Library (UPL; Roche Diagnostics GmbH, Roche Applied Science,
Mannheim, Germany). Data were analyzed with LIGHT CYCLER 480 Software. The detection format was set
to „Mono Color Hydrolysis Probe‟ and the second derivative maximum method was used for absolute
quantification.
1.9. Statistical analysis
All results were expressed as mean ± S.E.M. Results were assessed using one-way analysis of
variance, ANOVA, followed by Bonferroni‟s test for multiple comparisons. Data were analyzed employing
The Statistical Package for the Social Sciences, version 17 (SPSS Software, SPSS Inc., Chicago, USA). A
value of P < 0.05 was considered to be statistically significant.
III. Results
3.1. Effect of irbesartan on percentage survival, body weight, lung weight and lung coefficient
In the present study, pulmonary fibrosis was induced in rats by injection of BLM (10 mg/kg, i.p.) for 10 days.
BLM injection resulted in a decrease in the percentage of surviving rats (70%) compared to a surviving
percentage equals (100%) in vehicle-treated rats. Further BLM-treated rats showed a decrease in the total body
weight and an increase in the lung coefficient compared to the vehicle group (P < 0.05, Table 1). Treatment
with irbesartan (10, 20 and 40 mg/kg) for 21 days -starting from first day of bleomycin injection- did not
significantly improve the survival of rats compared to BLM group (Table 1). However, irbesartan (40 mg/kg)
reduced weight loss and decreased the lung coefficient of the survived rats compared to BLM- and irbesartan
(10mg/kg) groups (P < 0.05, Table 1). Treatment of healthy rats with irbesartan (40 mg/kg) –for the same
period of time- did not induce any mortality and showed an increase in the mean final body weight and a
decrease in the lung coefficient compared to BLM group (P < 0.05, Table 1).
Table 1: Effect of Irbesartan (10, 20 and 40mg/kg/day/21day) on survival percentage, body weight, lung weight and lung coefficient in
BLM-induced lung fibrosis in rats. BLM: bleomycin, Irb: irbesartan, BWt: body weight, LWt: lung weight. Values are expressed as mean ±
S.E.M and analyzed using one-way ANOVA followed by Bonferroni‟s multiple comparisons test, n = 10. a
P < 0.05 compared to vehicle
group, b
P < 0.05 compared to BLM group, c
P < 0.05 compared to irbesartan (10 mg/kg) group.
Groups Survival
(percentage)
%
Baseline
BWt (g)
Final
BWt (g)
Lung
Wt (g)
Lung Co-efficient
LWt (mg)/BWt (g)
Vehicle 100 204.5 ± 5.16 226.4 ± 9.58 1.69 ± 0.09 7.46 ± 0.2
BLM 70a
208.42 ± 5.22 191.25 ± 9.11a
1.7 ± 0.07 8.99 ± 0.36a
BLM+ Irb (10mg/kg) 60 208 ± 1.93 192.17 ± 2.36 1.70 ± 0.05 8.84 ± 0.22
BLM+ Irb (20mg/kg) 50 210.3 ± 2.67 197.8 ± 4.07 1.66 ± 0.01 8.41 ± 0.13
BLM+ Irb (40mg/kg) 50 214.9 ± 2.21 204.75 ± 2.71bc
1.68 ± 0.09 8.27 ± 0.44bc
Irb (40mg/kg) 100 219.5 ± 2.4 243.5 ± 10.65b
1.8 ± 0.11 7.41 ± 0.34b
4. Role of irbesartan in protection against pulmonary toxicity induced by bleomycin in rats
41
3.2. Effect of irbesartan on serum TNF-α, TGF-β1 and VEGF levels
Serum TNF-α level did not differ significantly among all the study groups (Fig. 1A). Injection with
BLM (10 mg/kg, i.p.) increased serum TGF-β1 and VEGF levels compared to vehicle- treated rats (P < 0.05,
Fig. 1B& C). Treatment with irbesartan (10, 20 and 40 mg/kg) decreased TGF-β1 and increased VEGF levels
compared to BLM group (P < 0.05, Fig. 1B& C). Further, irbesartan (40 mg/kg) showed a decrease in TGF-β1
level in the survived rats compared to irbesartan (10 mg/kg, P < 0.05). Treatment of healthy rats with irbesartan
(40 mg/kg) showed a comparable serum VEGF levels with higher serum TGF-β1 compared to vehicle-treated
group but showed lower serum levels of TGF- β1 and VEGF compared to BLM group (P < 0.05, Fig. 1B& C).
Figure 1: Effect of Irbesartan (10, 20 and 40 mg/kg) on serum level of TNF-α (A), TGF-β1 (B) and VEGF (C)
in BLM-induced lung fibrosis in rats. BLM: bleomycin, Irb: irbesartan. Values are expressed as mean ± S.E.M.
and analyzed using one-way ANOVA followed by Bonferroni‟s multiple comparisons test. *
Compared to
vehicle group at P <0.05, #
Compared to BLM group at P <0.05, $
Compared to irbesartan (10 mg/kg) group at
P <0.05, n= 10.
3.3. Effect of irbesartan on BLM-induced histopathological changes
The histological examination of the lung tissues revealed that vehicle-treated group showed normal
alveolar, bronchial walls and normal lung architecture with mean fibrosis score of (0, Fig. 2, A& B). However,
lung tissues in BLM group exhibited a marked thickening of alveolar walls, pulmonary inflammation and
leukocytes infiltration with damage to lung architecture. Additionally, excessive collagen deposition was
observed within lung structure with a mean histological score of (7.38 ± 0.18, Fig. 2, A& B). Administration of
irbesartan (10, 20 and 40 mg/kg) suppressed BLM-induced pulmonary fibrosis and enhanced the
histopathological picture of the lung which is associated with a reduction in the mean histopathological score
compared to BLM group (P < 0.05, Fig. 2, A& B). Further, irbesartan (20 and 40 mg/kg) showed a decrease in
the mean fibrosis score compared to irbesartan (10 mg/kg, P < 0.05). Irbesartan (40mg/kg) decreased mean
fibrosis score compared to irbesartan (20 mg/kg, P < 0.05). In addition, healthy rats treated with the highest
dose of irbesartan (40 mg/kg) showed mild-moderate inflammation and leukocytes infiltration with a higher
5. Role of irbesartan in protection against pulmonary toxicity induced by bleomycin in rats
42
fibrosis grade compared to vehicle-group but lower fibrosis grade compared to BLM-group (P < 0.05, Fig. 2,
A& B).
Figure 2: (A) Histopathological picture for lungs of different experimental groups, Masson‟s
trichrome stain (x40). (B) The histopathological score of the experimental groups. Values are expressed as
mean ± S.E.M. and analyzed using one-way ANOVA followed by Bonferroni‟s multiple comparisons test.
BLM: bleomycin, Irb: irbesartan. *
Compared to vehicle group at P <0.05, #
Compared to BLM group at P
<0.05, $
Compared to irbesartan (10 mg/kg) group at P <0.05, ¶
Compared to irbesartan (20 mg/kg) group at P
<0.05, n= 10.
3.4. Effect of irbesartan on immunohistochemical staining for AT1, α-SMA or VEGF in lung tissues
Immunohistochemical staining indicated high immunostaining of AT1 receptors, VEGF and α-SMA in
the lungs of BLM-treated rats compared to vehicle-treated rats (P < 0.05, Fig. 3A, B, C & D). Treatment with
irbesartan (10, 20 & 40mg/kg) reduced immunostaining of AT1 receptors compared to BLM group (P < 0.05,
Fig. 3, A& D). Treatment with irbesartan (20 and 40 mg/kg) reduced immunostaining of α-SMA (P < 0.05, Fig.
3, C& D) with increasing immunostaining of VEGF compared to BLM and irbesartan (10mg/kg) groups (P <
0.05, Fig. 3, B& D). Further, treatment of survived rats with irbesartan (40mg/kg) decreased immunostaining
of α-SMA compared to irbesartan (20mg/kg). However, healthy rats treated with irbesartan (40 mg/kg) showed
a comparable immunostaining of AT1 receptors and α-SMA (Fig. 3A, C& D) with higher immunostaining of
VEGF compared to the vehicle group (P < 0.05, Fig. 3B& D) but Lower immunostaining of AT1 and α-SMA
compared to BLM-group (P < 0.05, Fig. 3A, C & D)
.
6. Role of irbesartan in protection against pulmonary toxicity induced by bleomycin in rats
43
Figure 3: Effect of irbesartan (10, 20 and 40mg/kg) on immunohistochemical staining for AT1 (A), VEGF (B)
and α-SMA (C) in the lung tissues of BLM-induced fibrosis in rats (x 100 magnification). Optical density for
AT1, VEGF or α-SMA positive tissues in the experimental groups (D). Results are expressed as mean ± S.E.M.
and analyzed using one-way ANOVA followed by Bonferroni‟s multiple comparisons test. BLM: bleomycin,
Irb: irbesartan *
Compared to vehicle group at P <0.05, #
Compared to BLM group at P <0.05, $
Compared to
irbesartan (10 mg/kg) group at P <0.05, ¶
Compared to irbesartan (20 mg/kg) group at P <0.05, n= 10.
3.5. Effect of irbesartan on PAI-1 gene expression
Injection with BLM resulted in a higher increase in gene expression of PAI-1 in lung tissues compared
to vehicle-treated rats (P < 0.05, Fig. 4). Treatment with irbesartan (10, 20 and 40 mg/kg) decreased gene
expression of PAI-1 compared to BLM group (P < 0.05, Fig. 4). Further, treatment with irbesartan (40mg/kg)
showed lower gene expression of PAI-1 in the survived rats compared to irbesartan (10 and 20mg/kg).
However, healthy rats treated with irbesartan (40 mg/kg) showed higher expression of PAI-1 compared to the
vehicle group but lower gene expression compared to BLM-group (P < 0.05, Fig. 4).
7. Role of irbesartan in protection against pulmonary toxicity induced by bleomycin in rats
44
Figure 4: Effect of irbesartan (10, 20 and 40mg/kg) on expression of PAI-1 gene in lung tissue of
BLM-induced fibrosis in rats. Results are expressed as mean ± S.E.M. and analyzed using one-way ANOVA
followed by Bonferroni‟s multiple comparisons test. BLM: bleomycin, Irb: irbesartan. *
Compared to vehicle
group at P <0.05, #
Compared to bleomycin group at P <0.05, $
Compared to irbesartan (10 mg/kg) group at P
<0.05, ¶
Compared to irbesartan (20 mg/kg) group at P < 0.05, n = 10.
IV. DISCUSSION
In the present study, injection of BLM increased collagen deposition and induced histopathological changes in
lungs with high degree of fibrosis; this was in agreement with the findings reported previously [17, 18]. BLM-treated rats
exhibited higher reductions in their body weights through out the entire course of the experiment with an increase in lung
coefficient at the end of the experiment. These results were in consistence with [14, 17]. Administration of irbesartan
(40mg/kg) resulted in significant reduction in the marked weight losses and reduced the increase in lung coefficients
without reaching those of the control animals.
Immunohistochemical staining of AT1 receptors has been increased in BLM treated rats while treatment with
irbesartan (10, 20 and 40mg/kg) induced a significant decrease in AT1 receptors compared to BLM group. In agreement,
AT1 receptors expression was up regulated in fibrotic heart [19], liver [20], kidney [21], pancreas [22] and lung [23].
Whereas, valsartan reduced the increase in AT1 receptor expression and lung injury in bleomycin-treated rats [24] and
irbesartan significantly down-regulated the renal expression of AT1 receptor in 5/6 nephrectomized rats [21].
In the current study, BLM increased mRNA gene expression of PAI-1 in lung tissues. Similarly,
immunohistochemical expression of PAI-1 protein in BLM-fibrotic lungs of mice confirmed the role of PAI-1 in the
fibrotic phase rather than the acute inflammatory phase [25]. Further, it has been shown that a targeted deletion of the PAI-
1 gene in mice delayed the development of fibrosis [26], whereas, overexpression of PAI-1 increased deposition of collagen
and fibrin and produced more severe lung fibrosis induced by BLM in mice [27].
Irbesartan administration decreased the gene expression of PAI-1compared to BLM. In consistence with [28],
AT1 receptors blockade reduced mRNA expression of PAI-1 which was induced after continuous intrajugular infusion of
angiotensin-II in the aorta and heart of hypertensive rats. Further, olmesartan was reported to inhibit hepatic fibrosis and
expression of fibrogenic genes including PAI-1 in rat model of non-alcoholic steatohepatitis [29]. Pretreatment with
Losartan reduced Lipopolysaccharide-induced PAI-1 levels in mice lungs [30]. Importantly, clinical data demonstrated a
reduction in plasma levels of PAI-1 which was observed after 4 weeks of irbesartan therapy in patients with metabolic
syndrome [31]. Additionally, the progression of pulmonary fibrosis induced by BLM in rats was attenuated by
administration of PAI-1 small interfering RNA [32]. Therefore, PAI-1 is an important factor attributed in lung fibrosis.
Regarding VEGF, BLM-treated rats showed high serum level and immunohistochemical staining of VEGF in
lung tissues compared to vehicle group. In agreement, VEGF increased in lung tissues in BLM-treated rodent, peaked at
early phase after BLM administration and decreased up to the end of experiment, in fibrotic phase [33, 34].
Additionally, treatment with irbesartan increased serum VEGF level and immunohistochemical staining of VEGF
in lung tissues compared to BLM group. In consistence with35, blockade of AT1 receptor by losartan reversed the decrease
of microvessel density in rats hearts after myocardial infarction. Inhibition of angiotensin converting enzyme by quinaprilat
induced angiogenesis in the rabbit model of hindlimb ischemia [36]. In addition, Losartan induced angiogenesis in mice
through activation of AT2 receptor in alginate implant angiogenesis model while an impaired induction of angiogenesis was
shown in AT2 receptor knockout mice [37].
Further, study of Farkas et al. [38] demonstrated the reduced VEGF levels and microvasculaization loss with
increasing degrees of fibrosis in fibroblastic foci and fibrotic interstitium in rats with experimentally-induced lung fibrosis.
The increased vascular density in the least fibrotic areas contributed to the regeneration of alveolar septa damaged by the
fibrotic process [39]. Therefore, the protective effect of irbesartan in fibrotic lung may be attributed, in part, to up-
regulation of VEGF.
8. Role of irbesartan in protection against pulmonary toxicity induced by bleomycin in rats
45
In the present study, serum TNF-α level did not differ significantly among all the study groups. TNF-α
contributed to the pathophysiology of interstitial lung disease through induction of TGF-β1 expression [40]. The expression
of TNF-α rises in the lung at early phase while the level of TNF-α was below the limit of detection at the fibrotic phase in
mice with BLM-induced lung fibrosis [41] or decreased gradually on day 14 and 28 in fibrotic lung of BLM-treated rats
[14]. Therefore, the results of the current study may suggest that the increase in the experimental TNF- α did not continue
until the end of the experiment.
Our results revealed that administration of bleomycin was accompanied by high levels of TGF-β1 in the serum.
This was in consistence with various studies that indicated an increase of TGF-β1 level in the serum [42], bronchoalveolar
lavage fluid [23] of rats with BLM-fibrotic lungs. In addition to lung biopsies obtained from patients with idiopathic
pulmonary fibrosis43 and mice with BLM-induced fibrotic lungs [44]. Thereby, increased expression of TGF-β1 is believed
to be a critical mediator during initiation and progression of fibrosis.
Additionally, the present results found that treatment with irbesartan decreased the serum TGF-β1 level compared
to BLM-treated group. Similarly, AT1 receptor blockers suppressed TGF-β1 expression in the lung42, kidney45, pancreas46
and liver [29]. Further, administration of irbesartan reduced TGF-β1 level in bronchoalveolar lavage fluid in mice with
fibrotic lungs [12] and suppressed up-regulation of renal expression of TGF-β1 in 5/6 nephrectomized rats [21]. Valsartan
attenuated the progression of hepatic fibrosis in type 2 diabetic rats via reducing TGF-β1 [47].
Bleomycin injection in the present study resulted in an increase of α-SMA immunostaining in lung tissues while
treatment with irbesartan reduced this increase. In agreement, the presence of α-SMA-expressing myofibroblasts in the
affected tissue is typical for all fibrotic diseases [48]. Further, irbesartan reduced α-SMA expression in fibrotic skin of mice
[13] and Valsartan suppressed the expression of α-SMA in fibrotic liver of rats [47]. Administration of Irbesartan
(40mg/kg) to healthy rats resulted in increasing serum level of TGF-β1 and gene expression of PAI-1 in lung tissues and
this will need further studies to be explained.
V. CONCLUSIONS
This work demonstrated that the ameliorating effect of irbesartan against pulmonary fibrosis induced
by bleomycin in rats involves induction of angiogenesis, reduction of pulmonary expression of PAI-1 and
modulation of fibrotic mediators. Consequently, the present results support the harmful role of AT1 receptors in
mediating the effects of angiotensin-II in bleomycin-induced pulmonary injury and fibrosis in rats.
ACKNOWLEDGMENTS
The authors wish to acknowledge the generous gift of irbesartan from Medical Union Pharmaceuticals
(Ismailia, Egypt).
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