Vit. B12
• Methionine is methyl donor in many reactions
• THFA is methyl donor in conversion of dUMP to dTMP – essential for DNA
synthesis
• THFA is methyl donor in conversion of methylmalonyl CoA to succinyl CoA –
essential for propionic acid metabolism
• THFA is methyl donor in conversion of histidine to histamine
• THFA is methyl donor in conversion of norepinephrine to epinephrine
• THFA is methyl donor in conversion of serotonin to melatonin
• THFA is methyl donor in conversion of choline to betaine
So FA is essential for cell division and growth,
Iron toxicity in the human body, its mechanism, and effects, How iron toxicity can be treated pharmaceutically and the drugs administered. Mechanism of iron absorption in the body.
Iron toxicity in the human body, its mechanism, and effects, How iron toxicity can be treated pharmaceutically and the drugs administered. Mechanism of iron absorption in the body.
Please find the power point on Pharmacology of Anticoagulants, antiplatelets . I tried to present it on understandable way and all the contents are reviewed by experts and from very reliable references. Thank you
Iron poisoning (physical appearance, sources- dietary and environmental, uses- industrial and biological, usual fatal dose, toxicokinetics, mode of action, clinical features, diagnosis, treatment, autopsy features
Please find the power point on Pharmacology of Anticoagulants, antiplatelets . I tried to present it on understandable way and all the contents are reviewed by experts and from very reliable references. Thank you
Iron poisoning (physical appearance, sources- dietary and environmental, uses- industrial and biological, usual fatal dose, toxicokinetics, mode of action, clinical features, diagnosis, treatment, autopsy features
This module describes the types of minerals present in food. in nature we have several minerals which are generally classified into two as Major and Minor minerals. it also describes the recommended dietary allowance by ICMR 2020. Here you will be able to find the functions, sources and deficiency of each minerals.
Unit-1 New drug discovery and drug development PPT.pdfDr Yogi Pandya
New drug discovery and drug development process
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Clinical trials
steps in drug development process
New drug discovery and drug development process
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steps in drug development process
New drug discovery and drug development process
New drug discovery and drug development process
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Acetabularia Information For Class 9 .docxvaibhavrinwa19
Acetabularia acetabulum is a single-celled green alga that in its vegetative state is morphologically differentiated into a basal rhizoid and an axially elongated stalk, which bears whorls of branching hairs. The single diploid nucleus resides in the rhizoid.
2024.06.01 Introducing a competency framework for languag learning materials ...Sandy Millin
http://sandymillin.wordpress.com/iateflwebinar2024
Published classroom materials form the basis of syllabuses, drive teacher professional development, and have a potentially huge influence on learners, teachers and education systems. All teachers also create their own materials, whether a few sentences on a blackboard, a highly-structured fully-realised online course, or anything in between. Despite this, the knowledge and skills needed to create effective language learning materials are rarely part of teacher training, and are mostly learnt by trial and error.
Knowledge and skills frameworks, generally called competency frameworks, for ELT teachers, trainers and managers have existed for a few years now. However, until I created one for my MA dissertation, there wasn’t one drawing together what we need to know and do to be able to effectively produce language learning materials.
This webinar will introduce you to my framework, highlighting the key competencies I identified from my research. It will also show how anybody involved in language teaching (any language, not just English!), teacher training, managing schools or developing language learning materials can benefit from using the framework.
Introduction to AI for Nonprofits with Tapp NetworkTechSoup
Dive into the world of AI! Experts Jon Hill and Tareq Monaur will guide you through AI's role in enhancing nonprofit websites and basic marketing strategies, making it easy to understand and apply.
Read| The latest issue of The Challenger is here! We are thrilled to announce that our school paper has qualified for the NATIONAL SCHOOLS PRESS CONFERENCE (NSPC) 2024. Thank you for your unwavering support and trust. Dive into the stories that made us stand out!
Biological screening of herbal drugs: Introduction and Need for
Phyto-Pharmacological Screening, New Strategies for evaluating
Natural Products, In vitro evaluation techniques for Antioxidants, Antimicrobial and Anticancer drugs. In vivo evaluation techniques
for Anti-inflammatory, Antiulcer, Anticancer, Wound healing, Antidiabetic, Hepatoprotective, Cardio protective, Diuretics and
Antifertility, Toxicity studies as per OECD guidelines
Exploiting Artificial Intelligence for Empowering Researchers and Faculty, In...Dr. Vinod Kumar Kanvaria
Exploiting Artificial Intelligence for Empowering Researchers and Faculty,
International FDP on Fundamentals of Research in Social Sciences
at Integral University, Lucknow, 06.06.2024
By Dr. Vinod Kumar Kanvaria
Operation “Blue Star” is the only event in the history of Independent India where the state went into war with its own people. Even after about 40 years it is not clear if it was culmination of states anger over people of the region, a political game of power or start of dictatorial chapter in the democratic setup.
The people of Punjab felt alienated from main stream due to denial of their just demands during a long democratic struggle since independence. As it happen all over the word, it led to militant struggle with great loss of lives of military, police and civilian personnel. Killing of Indira Gandhi and massacre of innocent Sikhs in Delhi and other India cities was also associated with this movement.
Macroeconomics- Movie Location
This will be used as part of your Personal Professional Portfolio once graded.
Objective:
Prepare a presentation or a paper using research, basic comparative analysis, data organization and application of economic information. You will make an informed assessment of an economic climate outside of the United States to accomplish an entertainment industry objective.
Synthetic Fiber Construction in lab .pptxPavel ( NSTU)
Synthetic fiber production is a fascinating and complex field that blends chemistry, engineering, and environmental science. By understanding these aspects, students can gain a comprehensive view of synthetic fiber production, its impact on society and the environment, and the potential for future innovations. Synthetic fibers play a crucial role in modern society, impacting various aspects of daily life, industry, and the environment. ynthetic fibers are integral to modern life, offering a range of benefits from cost-effectiveness and versatility to innovative applications and performance characteristics. While they pose environmental challenges, ongoing research and development aim to create more sustainable and eco-friendly alternatives. Understanding the importance of synthetic fibers helps in appreciating their role in the economy, industry, and daily life, while also emphasizing the need for sustainable practices and innovation.
Normal Labour/ Stages of Labour/ Mechanism of LabourWasim Ak
Normal labor is also termed spontaneous labor, defined as the natural physiological process through which the fetus, placenta, and membranes are expelled from the uterus through the birth canal at term (37 to 42 weeks
2. Background
• These are the substances required in the formation of
blood, and are used in the treatment of anaemias
• Anaemia: a condition in which there is a deficiency of
red cells or of haemoglobin in the blood, resulting in
pallor and weariness
• Balance between production and destruction of RBCs
are disturbed:
– Blood Loss (acute or chronic)
– Impaired cell formation due to
• Deficiency of essential factors – Iron, Vit. B12 and Folic acid
• Bone marrow depression (hypoplastic), erythropoietin deficiency
– Increased cell destruction (haemolytic)
4. Iron – Basics
• Total Body Iron content – 3.5 gm (average): Male – 50 mg/kg and Female
– 38 mg/kg
• Hemoglobin – 66% - Protoporphyrin – 4 Iron containing haeme residues
• Loss of 100 ml of blood – 50 mg elemental Iron
• To raise 1 gm/dl – 200 mg elemental Iron required
• Stored only in Ferric form (Fe3+
) – in combination with apoferritin – mainly
in RE Cells
• Many cellular enzymes – cytochromes, peroxidases, catalases, xanthine
oxidases and some mitochondrial enzymes
• Severe Iron deficiency affects all cells
• Daily requirement: Male: 0.5 to 1 mg/day; Female: 1.5 to 2 mg/day (more
in pregnancy) ………… Sources ???
Apoferritn + Fe3+
Ferritin Haemosiderin
aggregates
5. Iron Absorption
• Diet – 10 to 20 mg – absorbed from all over the Intestine (more
from upper part)
• 2 forms – haeme and Inorganic
– Haeme – minor form of dietary Iron but absorbed better without any
transporter
– Inorganic – in ferric form but absorbs lesser – converted to ferrous
form in Intestine for absorption – needs transporter
– Divalent metal transporter (DMT1) and Ferroportin (FP)
• Factors increasing absorption – acid, reducing substances – ascorbic
acid, amino acid etc. and meat
• Factors impending absorption – alkali (antacids), Phosphates,
phytates, tetracycline and presence of other food
• Mucosal block: from mucosal cell – transported to plasma or
remains stored in mucosal cell by forming ferritin - Ferritin curtain
– Balance between those two – detremines how much Iron to enter
body - by haematopoietic transcription factor
6. Iron – Transport, storage etc.
• In plasma immediately converted to Fe3+
form – complexed
with transferrin (Tf) – Total Plasma Iron – 3 mg - recycled
• Transported to RBCs by transferrin receptors (TfRs) –
endocytosis – Iron dissociates from TfR in acidic pH of
vesicles
• Iron utilized for Hb synthesis – TfRs return to surface
• In Iron deficiency – TfRs increase
• Storage – RE cells in Liver, spleen, bone and muscles as
ferritin and haemsiderin
• Apoferritin – determines how much Iron storage needed -
synthesis regulated by Iron status and Iron regulating
element on mRNA – blocked in low Iron – no apoferritin
synthesis – in high Iron state – more apoferritin synthesis
• Excretion – 0.5 to 1 mg/day – exfoliation in GI mecosal
cells, RBCs and in Bile …. Also in skin, urine and sweat
7. Iron –Absorption, Transport, storage
etc. - Image
Essentials of Medical pharmacology by KD Tripathi – 6th
Edition, JAYPEE, 2008
8. Iron Preparations - Oral
• Preferred route – ferrous salts – high Iron content, inexpensive,
better absorbed than ferric salts …. Gastric irritation and
constipation limits use
– Ferrous sulfate (20% hydrated salt and dried salt 32% or 65 mg)
– Ferrous gluconate (12% Iron or 28-36 mg)
– Ferrous fumerate (33% or 106 mg)
– Colloidal ferric hydroxide (50%) ……… 150 to 200 mg per day
• Other preparations: Ferrous succinate, Iron choline citrate, Iron
calcium complex, Ferric ammonium citrate, Iron hydroxy
polymaltose … low Iron content (less GI upset) and expensive
• No to Vit. B –complex combination (GOI) with Iron and Folic acid
preparations and also no to sustained release preparations
• Dosage: 200 mg daily in 3 divided doses (3 – 5 mg/kg for children)
• ADRs: Differ in susceptibility – individuals …. Epigastric pain, heart
burn, nausea, vomiting, staining of teeth, metallic taste, bloating,
colic -- CONSTIPATION
9. Iron Preparations - Parenteral
• Indications:
– Failure to absorb oral Iron – malabsorption, inflammatory bowel
disease (proximal small bowel)
– Post gastrectomy conditions
– Severe deficiency with chronic bleeding
– Either intolerance and non-compliance to oral Iron
– With erythropoietin
• Calculation: 4.4 X body weight (kg) X Hb deficit (g/dl)
• Not faster absorption than oral but stores replenish faster
• Preparations: Iron-dextran (colloidal solution) 50 mg/ml
Iron and Iron-sorbitol-citric acid complex and Sodium ferric
gluconate complex in sucrose
10. Parenteral Iron
• IM: Z technique – deep in
gluteal region – 2 ml daily or
on alternate days or 5 ml each
side on same day – Iron
sorbitol – 1.5 to 2.00 ml per
day
• IV: Iron dextran - 0.5 ml test
dose –for 5 to 10 minutes … 2
ml for 10 minutes
• Or in 500 ml glucose/saline
slow infusion – constant
observation
• Terminate if – giddiness,
paresthesia or chest
constriction
Essentials of Medical pharmacology by KD Tripathi – 6th
Edition, JAYPEE, 2008
11. Iron – contd.
• ADRs:
– Local: Pain in IM injection, pigmentation of skin, sterile abscess
– Systemic: Fever, headache, joint pain, flushing, palpitation, chest pain,
dyspnoea, lymph node enlargement
• Metallic taste with sorbitol
• Anaphylactoid reaction – Kidney diseases (no sorbitol)
• Uses:
– Iron deficiency anaemia: Nutritional deficiency, chronic blood loss (GIT
ulcers and hook worm)
• Oral Iron preferred : Target – 0.5 to 1 g/dl per week – 1 to 3 months therapy
plus 2 to 3 months afterwards
• Prophylaxis: Ceiling on Iron absorption - = 3 mg/day ….. Pregnancy and
infancy to be taken care of well in advance
– Megaloblastic anaemia
– As astringent: Ferric chloride
12. Acute Iron Poisoning
• Infants and children – 10 to 20 tablets (60 mg/kg Iron)
• Symptoms: Vomiting, abdominal pain, haematemesis, diarrhoea,
lethargy, cyanosis, dehydration, acidosis, convulsion, CVS collapse
and death (12 – 36 Hours)
– Haemorrhage and inflammation of gut, hepatic necrosis and brain
damage
• Treatment:
– Prevent further absorption: Induce vomitingor gastric lavage with
NaHCO3 – to render Iron insoluble …… and also Egg yolk and Milk orally
– Antidote: Desferrioxamine: 0.5 to 1.00 gm IM repeated 4 – 12 Hourly
or IV 10 – 15 mg/kg/Hour (max 75 mg/day) till serum levels fall
– DTPA and Calcium edetate
– Supportive: Fluid and electrolyte, correction of acidosis and Diazepam
14. Introduction
• Complex cobalt containing compounds
Cyanocobalamin and hydroxocobalamin
• Physical: Water soluble, red crystals
synthesized only by microorganisms
• Sources: Liver, Kidney, sea fish, egg yolk ….
Streptomyces geireus
• Daily Requirement: 1 – 3 mcg (Pregnancy and
Lactation3 – 5 mcg)
15. Vit. B12 - Metabolic functions
• Linked with folic acid metabolism – megaloblastic anaemia
indistinguishable
• Two active forms - Deoxy-adenosyl-cobalamin (DAB12) and methyl-
cobalamin (methyl-B12)
1) Vit. B12 needed for conversion of homocysteine to methionine – methionine
is methyl group donor in metabolic reactions – also critical for making THFA
available
2) Purine and pyrymidine synthesis is affected – folate trap – non availability
of thymidylate for DNA synthesis
3) Malonic acid Succinic acid - important for propionic acid
metabolism (Carbohydrate and lipid metabolism) – linked to demyelination
in Vit. B12 deficiency
4) Methionine S-adenosyl methionine – neurological
damage
5) Vit. B12 is needed for cell growth and multiplications
16. Vit. B12 - Kinetics
• Absorption: Present in food as protein conjugates – released
by cooking/proteolysis
– IF forms a complex with Vit. B12 – attaches to specific receptor in
mucosa – absorbed by active transport
• Transport: In combination with transcobalamin II (TCII) –
congenital absence/abnormal protein (liver disease and BM
disease) – defective supply to tissues
• Storage: In liver – 4/5th
of Body`s Vit.B12
• Degradation: Not degraded in body – excreted mainly in Bile –
enterohepatic circulation ….. absence of IF and malabsorption
Vs Nutritional deficiency
• Parenteral – completely absorbed -IM and SC administration
– excreted via urine
17. Deficiency - Vit. B12
• Deficiency: Addisonian pernicious anaemia (destruction of
parietal cells – IF absent), gastric mucosal damage, damaged
intestinal mucosa, consumption by abnormal flora (blind loop
syndrome & fish tape worm), nutritional deficiency, increased
demand
• Manifestations: Megaloblastic anaemia, glossitis, GI
disturbance, degeneration of spinal chord and peripheral
neuritis – diminished vibration and position sense,
paresthesia, depressed reflexes and mental changes
• Preparations: Cyanocobalamin Injection, Hydroxocobalamin
Injection and Methylcobalamin Tablets
18. Vit. B12 – Uses and ADRs
• Prophylactically in diabetics and alcoholics – to prevent
peripheral neuritis – 1.5 mg/day
• Treatment of deficiency states: Add Folic acid and Iron
– Very quick response – appetite increases, patient feel better, mucosal
lesions heal, neurological parameters improve
– If due to IF factor lacking – IM or SC (not IV) – necessary to by pass
defective absor scheduleption – daily-weekly-monthly
• Mega doses: in neuropathies, psychiatric disorders,
cutaneous sarcoid
• Tobacco amblyopia – cyanide to cyanocobalamin
• ADRs: Safe – allergic reactions due to contaminants
20. Introduction
• Physical: Yellow crystals, insoluble in water, Pteroyl glutamic acid
(PGA) – pteridine + paraminobenzoic acids + glutamic acid
• Daily requirement: 0.2 mg per day (0.8 mg in pregnancy and
lactation)
• Kinetics:
– Absorption: As polyglutamates in food – glutamates split off and
absorbed in upper intestine ….. Reduction to DHFA and methylation
also occurs at same site
– Transport: as methyl-THFA – partly bound to plasma protein
– Store: tissues extract FA rapidly and store as polyglutamates in cells.
Liver takes up major portion – releases methyl-THFA – enterohepatic
circulation (alcohol interferes)
– Excretion: Pharmacological doses – excreted in Urine
21. Folic acid – Metabolic function
• Conversion of homocysteine to methionine
• Generation of thymidylate
• Conversion of serine to glycine
• Purine synthesis de novo
• Histidine metabolism
25. Introduction
• Sialoglycoprotein hormone – produced by peritubular cells of Kidney
• Recombinant human erythropoietin (Epoetin α, β) – administerd IV or SC
• Half life: 6 – 10 Hours
• Required for erythropoiesis: anaemia and hypoxia sensed by kidney cells –
EPO secretes and acts on marrow:
– Stimulates proliferation of colony forming cells of erythroid series
– Induces Hb formation and erythroblast maturation
– Release of reticulocytes
• MOA: Binds to specific EPO receptor (JAK-STAT-kinase) – alters
phosphorylation of intracellular proteins and activates transcription
factors to regulate gene expression – erythropoiesis
26. Erythropoietin – Uses and ADRs
• Anaemia of chronic renal failure – 25 – 100 U/kg SC or IV 3
times a day – concomitant Iron therapy
• Anaemia with AIDS patients treated with zidovudine
• Cancer chemotherapy induced anaemia
• Preoperative increased blood production – autologous
transfusion
• ADRs: Nonimmunogenic, ----- ADRs occur due to increase in
haematocrit, viscosity and peripheral resistance – increased
clot formation in AV- shunts, hypertensive episodes, seizure,
flu like symptoms