This document summarizes immunosuppressive drugs. It discusses how they work to suppress the immune system and are used to prevent organ rejection after transplantation and treat autoimmune diseases. The main classes of immunosuppressive drugs covered are glucocorticoids, calcineurin inhibitors like cyclosporine and tacrolimus, antiproliferative drugs including mycophenolate mofetil and mTOR inhibitors, immunosuppressive antibodies, and others. Specific drugs within each class are described in terms of their mechanisms of action, pharmacokinetics, uses, and side effects.
Immunosuppressant are drugs or medicines that lower the body's ability to reject a transplanted organ. Another term for these drugs is anti-rejection drugs. There are 2 types of immunosuppressants: Induction drugs: Powerful antirejection medicine used at the time of transplant.
Immunosuppressants are drugs or medicines that lower the body's ability to reject a transplanted organ. Another term for these drugs is anti-rejection drugs. There are 2 types of immunosuppressants:
Induction drugs: Powerful antirejection medicine used at the time of transplant
Maintenance drugs: Antirejection medications used for the long term.
Immunosuppressant are drugs or medicines that lower the body's ability to reject a transplanted organ. Another term for these drugs is anti-rejection drugs. There are 2 types of immunosuppressants: Induction drugs: Powerful antirejection medicine used at the time of transplant.
Immunosuppressants are drugs or medicines that lower the body's ability to reject a transplanted organ. Another term for these drugs is anti-rejection drugs. There are 2 types of immunosuppressants:
Induction drugs: Powerful antirejection medicine used at the time of transplant
Maintenance drugs: Antirejection medications used for the long term.
Immunosupressants and Immunostimulants their pharmacology, uses etc. Basics of immunology, innate immune response, acquired immune response, role of complement in innate immune response. Major histocompatibility complex, antibody structure. classification of immunosupressants, their mechanism of action, uses and adverse effects.
Alexander Fleming
Microbes make antibiotics
Extracted from Penicillin Notatum
ORIGIN: moldy culture plate
DRUG: Penicillin (1928)
NOBEL: 1945
1.According to source: Antibiotic isolate from 3 type of microbs
From Fungi: Penicillin From Penicillin Notatum .
From Actinomycetes: Streptomycin From
Streptomyces Griseus
From Bacteria: Bacitracin From Bacillus Subtilis
Inhibitors Of Bacterial Cell Wall Synthesis:Penicillin , Cephalosporine, Bacitaeacin,Cycloserine
2. Inhibitors Of Protien Synthesis: Aminogycoside,Tertacycline, Chloramphenicol,
Macrolides, Lincosamide
3. Inhibitors Of Bacterial Cell Membrane Function Polymyxins, Nystatin, Amphotericine B.
4. Inhibitors Of Nucleic Acid Metabolism: Grisofulvine, Actinomycin
DMARDs and biologics have made a huge difference in the lives of people with RA and other rheumatologic disorders. Biologics era was showed+ in the year 1998 with the FDA approval of TNF antagonist and etanercept. Biologics bring the disease under control in 4–6 weeks compared to 3–6 months taken by traditional DMARDs.
Immunosupressants and Immunostimulants their pharmacology, uses etc. Basics of immunology, innate immune response, acquired immune response, role of complement in innate immune response. Major histocompatibility complex, antibody structure. classification of immunosupressants, their mechanism of action, uses and adverse effects.
Alexander Fleming
Microbes make antibiotics
Extracted from Penicillin Notatum
ORIGIN: moldy culture plate
DRUG: Penicillin (1928)
NOBEL: 1945
1.According to source: Antibiotic isolate from 3 type of microbs
From Fungi: Penicillin From Penicillin Notatum .
From Actinomycetes: Streptomycin From
Streptomyces Griseus
From Bacteria: Bacitracin From Bacillus Subtilis
Inhibitors Of Bacterial Cell Wall Synthesis:Penicillin , Cephalosporine, Bacitaeacin,Cycloserine
2. Inhibitors Of Protien Synthesis: Aminogycoside,Tertacycline, Chloramphenicol,
Macrolides, Lincosamide
3. Inhibitors Of Bacterial Cell Membrane Function Polymyxins, Nystatin, Amphotericine B.
4. Inhibitors Of Nucleic Acid Metabolism: Grisofulvine, Actinomycin
DMARDs and biologics have made a huge difference in the lives of people with RA and other rheumatologic disorders. Biologics era was showed+ in the year 1998 with the FDA approval of TNF antagonist and etanercept. Biologics bring the disease under control in 4–6 weeks compared to 3–6 months taken by traditional DMARDs.
Immunosuppressants are drugs which inhibit cellular/humoral or both types of immune responses and have their major use in organ transplantation and autoimmune diseases.
Immunostimulators are prescribed to enhance the immune response against infectious diseases, tumours, primary or secondary immunodeficiency, and alterations in antibody transfer, among others .
Explore natural remedies for syphilis treatment in Singapore. Discover alternative therapies, herbal remedies, and lifestyle changes that may complement conventional treatments. Learn about holistic approaches to managing syphilis symptoms and supporting overall health.
Pulmonary Thromboembolism - etilogy, types, medical- Surgical and nursing man...VarunMahajani
Disruption of blood supply to lung alveoli due to blockage of one or more pulmonary blood vessels is called as Pulmonary thromboembolism. In this presentation we will discuss its causes, types and its management in depth.
These simplified slides by Dr. Sidra Arshad present an overview of the non-respiratory functions of the respiratory tract.
Learning objectives:
1. Enlist the non-respiratory functions of the respiratory tract
2. Briefly explain how these functions are carried out
3. Discuss the significance of dead space
4. Differentiate between minute ventilation and alveolar ventilation
5. Describe the cough and sneeze reflexes
Study Resources:
1. Chapter 39, Guyton and Hall Textbook of Medical Physiology, 14th edition
2. Chapter 34, Ganong’s Review of Medical Physiology, 26th edition
3. Chapter 17, Human Physiology by Lauralee Sherwood, 9th edition
4. Non-respiratory functions of the lungs https://academic.oup.com/bjaed/article/13/3/98/278874
Acute scrotum is a general term referring to an emergency condition affecting the contents or the wall of the scrotum.
There are a number of conditions that present acutely, predominantly with pain and/or swelling
A careful and detailed history and examination, and in some cases, investigations allow differentiation between these diagnoses. A prompt diagnosis is essential as the patient may require urgent surgical intervention
Testicular torsion refers to twisting of the spermatic cord, causing ischaemia of the testicle.
Testicular torsion results from inadequate fixation of the testis to the tunica vaginalis producing ischemia from reduced arterial inflow and venous outflow obstruction.
The prevalence of testicular torsion in adult patients hospitalized with acute scrotal pain is approximately 25 to 50 percent
Title: Sense of Smell
Presenter: Dr. Faiza, Assistant Professor of Physiology
Qualifications:
MBBS (Best Graduate, AIMC Lahore)
FCPS Physiology
ICMT, CHPE, DHPE (STMU)
MPH (GC University, Faisalabad)
MBA (Virtual University of Pakistan)
Learning Objectives:
Describe the primary categories of smells and the concept of odor blindness.
Explain the structure and location of the olfactory membrane and mucosa, including the types and roles of cells involved in olfaction.
Describe the pathway and mechanisms of olfactory signal transmission from the olfactory receptors to the brain.
Illustrate the biochemical cascade triggered by odorant binding to olfactory receptors, including the role of G-proteins and second messengers in generating an action potential.
Identify different types of olfactory disorders such as anosmia, hyposmia, hyperosmia, and dysosmia, including their potential causes.
Key Topics:
Olfactory Genes:
3% of the human genome accounts for olfactory genes.
400 genes for odorant receptors.
Olfactory Membrane:
Located in the superior part of the nasal cavity.
Medially: Folds downward along the superior septum.
Laterally: Folds over the superior turbinate and upper surface of the middle turbinate.
Total surface area: 5-10 square centimeters.
Olfactory Mucosa:
Olfactory Cells: Bipolar nerve cells derived from the CNS (100 million), with 4-25 olfactory cilia per cell.
Sustentacular Cells: Produce mucus and maintain ionic and molecular environment.
Basal Cells: Replace worn-out olfactory cells with an average lifespan of 1-2 months.
Bowman’s Gland: Secretes mucus.
Stimulation of Olfactory Cells:
Odorant dissolves in mucus and attaches to receptors on olfactory cilia.
Involves a cascade effect through G-proteins and second messengers, leading to depolarization and action potential generation in the olfactory nerve.
Quality of a Good Odorant:
Small (3-20 Carbon atoms), volatile, water-soluble, and lipid-soluble.
Facilitated by odorant-binding proteins in mucus.
Membrane Potential and Action Potential:
Resting membrane potential: -55mV.
Action potential frequency in the olfactory nerve increases with odorant strength.
Adaptation Towards the Sense of Smell:
Rapid adaptation within the first second, with further slow adaptation.
Psychological adaptation greater than receptor adaptation, involving feedback inhibition from the central nervous system.
Primary Sensations of Smell:
Camphoraceous, Musky, Floral, Pepperminty, Ethereal, Pungent, Putrid.
Odor Detection Threshold:
Examples: Hydrogen sulfide (0.0005 ppm), Methyl-mercaptan (0.002 ppm).
Some toxic substances are odorless at lethal concentrations.
Characteristics of Smell:
Odor blindness for single substances due to lack of appropriate receptor protein.
Behavioral and emotional influences of smell.
Transmission of Olfactory Signals:
From olfactory cells to glomeruli in the olfactory bulb, involving lateral inhibition.
Primitive, less old, and new olfactory systems with different path
ARTIFICIAL INTELLIGENCE IN HEALTHCARE.pdfAnujkumaranit
Artificial intelligence (AI) refers to the simulation of human intelligence processes by machines, especially computer systems. It encompasses tasks such as learning, reasoning, problem-solving, perception, and language understanding. AI technologies are revolutionizing various fields, from healthcare to finance, by enabling machines to perform tasks that typically require human intelligence.
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Tom Selleck Health: A Comprehensive Look at the Iconic Actor’s Wellness Journeygreendigital
Tom Selleck, an enduring figure in Hollywood. has captivated audiences for decades with his rugged charm, iconic moustache. and memorable roles in television and film. From his breakout role as Thomas Magnum in Magnum P.I. to his current portrayal of Frank Reagan in Blue Bloods. Selleck's career has spanned over 50 years. But beyond his professional achievements. fans have often been curious about Tom Selleck Health. especially as he has aged in the public eye.
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Introduction
Many have been interested in Tom Selleck health. not only because of his enduring presence on screen but also because of the challenges. and lifestyle choices he has faced and made over the years. This article delves into the various aspects of Tom Selleck health. exploring his fitness regimen, diet, mental health. and the challenges he has encountered as he ages. We'll look at how he maintains his well-being. the health issues he has faced, and his approach to ageing .
Early Life and Career
Childhood and Athletic Beginnings
Tom Selleck was born on January 29, 1945, in Detroit, Michigan, and grew up in Sherman Oaks, California. From an early age, he was involved in sports, particularly basketball. which played a significant role in his physical development. His athletic pursuits continued into college. where he attended the University of Southern California (USC) on a basketball scholarship. This early involvement in sports laid a strong foundation for his physical health and disciplined lifestyle.
Transition to Acting
Selleck's transition from an athlete to an actor came with its physical demands. His first significant role in "Magnum P.I." required him to perform various stunts and maintain a fit appearance. This role, which he played from 1980 to 1988. necessitated a rigorous fitness routine to meet the show's demands. setting the stage for his long-term commitment to health and wellness.
Fitness Regimen
Workout Routine
Tom Selleck health and fitness regimen has evolved. adapting to his changing roles and age. During his "Magnum, P.I." days. Selleck's workouts were intense and focused on building and maintaining muscle mass. His routine included weightlifting, cardiovascular exercises. and specific training for the stunts he performed on the show.
Selleck adjusted his fitness routine as he aged to suit his body's needs. Today, his workouts focus on maintaining flexibility, strength, and cardiovascular health. He incorporates low-impact exercises such as swimming, walking, and light weightlifting. This balanced approach helps him stay fit without putting undue strain on his joints and muscles.
Importance of Flexibility and Mobility
In recent years, Selleck has emphasized the importance of flexibility and mobility in his fitness regimen. Understanding the natural decline in muscle mass and joint flexibility with age. he includes stretching and yoga in his routine. These practices help prevent injuries, improve posture, and maintain mobilit
2. Immunosuppressive drugs
• Agent that suppress or reduce the strength of the
body’s immune response,
1. They used in organ transplantation (anti-rejection
drugs ) to prevent organ rejection as in liver, heart
and kidney transplantation .
2. They also used to treat autoimmune diseases in
which the body attacks it’s own tissue as RA,Systemic
Lupus Erythematosus, Multiple Sclerosis ,…
4. Quick review of immune response
The Immune system consist of two type :
1-Innate immune system(non specific, no memory response is the first
line of defense against invading pathogens consists of :
• Mechanical components ( skin/epidermis and mucus membrane)
• Biochemical components ( Interferons, acidic pH, and free radicals).
• Cellular components ( neutrophils, macrophages and NK,…)
2-The adaptive immune system (specific, memory response) 2nd line
of defense consist of :
• Cell-mediated immunity ( activation of T lymphocytes).
• Humoral immunity (production of antibodies).
8. Cyclosporine (peptide antibiotic) eg.Neoral
MOA : as above
PK :It can be given IV or orally .. slowly absorbed (20–50%).
• Metabolized by the P450 3A enzyme system in the liver (multiple drug
interactions)
• Requires individualization of dose based on steady-state blood levels and the
desired therapeutic ranges for the drug (TDM)
SE:nephrotoxicity, hypertension, hyperglycemia, liver dysfunction, hirsutism
and little bone marrow toxicity.
• incidence of lymphoma and other cancers ( induc. TGF-β tumor invasion and
metastasis)
9. Uses :
• Alone or in combination with glucocorticoids.
• It has been used successfully as the sole immunosuppressant for
cadaveric transplantation of the kidney, pancreas, and liver, and it has
proved extremely useful in cardiac transplantation as well.
• In combination with methotrexate in sever of autoimmune disorders
(RA, psoriasis) .
• As standard prophylactic regimen to prevent GVH disease after
allogeneic stem cell transplantation.
• Cyclosporine ophthalmic solution for ocular GVH disease.
• Inhaled cyclosporine is being investigated for use in lung
transplantation.
10. Tacrolimus FK 506 (macrolide antibiotic) eg. Prograf
MOA : as above
PK : 10–100 times more potent than cyclosporine.
• It can be administered orally or intravenously.
• Metabolized primarily by P450 enzymes in the liver ( drug interactions).
• The dosage is determined by trough blood level at steady state (TDM)
SE : like CAS nephrotoxicity, neurotoxicity, hypertension, hyperkalemia, and
gastrointestinal complaints but no hirsutism and more hyperglucmia effect.
Uses :
• considered a standard prophylactic agent (usually in combination
with methotrexate or mycophenolate mofetil) for GVH disease.
• Topically dermatitis and psoriasis.
13. Sirolimus
MOA : as above
PK : Available only as oral preparation.
• Rapidly absorbed , with high fatty meals it’s absorption decreased .
• Metabolized by cytochrome P-450 enzyme (Drug interaction)
• Target dose-ranges of these drugs vary depending on clinical use (TDM).
SE: thrombocytopenia, hepatotoxicity, diarrhea, hypertriglyceridemia,
pneumonitis, and headache.
14. Uses :
• In combination with (corticosteroids, cyclosporine, tacrolimus, and
mycophenolate mofetil) to prevent rejection of solid organ allografts.
• As prophylaxis when combined with tacrolimus in stem cell transplantation
regimens as GVH disease.
• Topical sirolimus is also used in some dermatologic disorders .
• Recently, sirolimus-eluting coronary stents have been shown to reduce
restenosis and additional adverse cardiac events in patients with severe
coronary artery disease, due to the drug’s antiproliferative effects.
15. 2-MYCOPHENOLATE MOFETIL
Mycophenolate mofetil (MMF) is a semisynthetic derivative of mycophenolic acid
(to enhance bioavailability)
MOA :it inhibits T- and B-lymphocyte responses, by inhibition synthesis of
purines.
PK : available in both oral and intravenous forms.
• Mycophenolate mofetil is hydrolyzed to mycophenolic acid(active moiety)
• The oral form is rapidly metabolized to mycophenolic acid.
• Although the cytochrome P450 3A system is not involved, some drug interactions
still occur.
• Plasma drug levels are frequently monitored.
SE :
• Toxicities include gastrointestinal disturbances (N,V,D and abdominal pain)
• Headache, hypertension, and reversible myelosuppression (primarily
neutropenia)
16. Uses :
• used in solid organ transplant patients for refractory rejection .
• In combination with prednisone, as an alternative to cyclosporine or
tacrolimus in patients who do not tolerate those drugs.
• Its antiproliferative properties make it the first-line drug for preventing or
reducing chronic allograft vasculopathy in cardiac transplant recipients.
• Mycophenolate mofetil is used as prophylaxis for and treatment of both
acute and chronic GVH disease in hematopoietic stem cell transplant
patients.
• Newer applications for MMF include lupus nephritis, RA,IBS and some
dermatologic disorders.
17. 3- Azathioprine
It is antimetabolite group of cytotoxic immunosuppressive drugs, and
many other agents that kill proliferative cells appear to work at a similar
level in the immune response.
Pk:
• it is a prodrug of mercaptopurine .
• Metabolized primarily to mercaptopurine and further metabolites ,
• As Xanthine oxidase converts much of the active material to 6-thiouric
acid prior to excretion in the urine. (Drug interaction with Allopurinol
dose reduction )
SE:
• BM suppression (manifested as leukopenia, thrombocytopenia and
anemia and may occur)
• Skin rashes, fever, GIT symptoms seen mainly at higher dosages. (N,V
&D)
• Hepatic dysfunction (manifested by very high serum alkaline
phosphatase levels and mild jaundice Spe. with preexisting hepatic
dysfunction.
18. 4-Leflunomideis a prodrug of an inhibitor of
pyrimidine synthesis rather than purine like azathioprine and
mycophenolate.
Orally active used only for RA
uses:
• It is approved only for rheumatoid arthritis at present
SE:
• Elevate liver enzymes with some risk of liver damage .
• Nephrotoxicity.
• Teratogenic .
• A low frequency of cardiovascular effects (angina, tachycardia) has
been reported.
19. 5-Hydroxychloroquine
• It is an antimalarial agent with immunosuppressant properties.
MOA : It is thought to suppress intracellular antigen processing and
loading of peptides onto MHC class II molecules by increasing the pH of
lysosomal and endosomal compartments, thereby decreasing T-cell activation
Uses:
• Treat some autoimmune disorders ( eg, RA and SLE)
• Treat and prevent GVH disease after allogeneic stem cell transplantation.
20. 6-MTX
MOA: It inhibts (AICAR-transformylase) amino-imidazolecarboxamide
ribonucleotide transformylase. which accumulates intracellularly,
competitively inhibits AMP deaminase, leading to an accumulation of AMP
which converted extracellularly to adenosine, which is a potent inhibitor of
inflammation.
As a result, the inflammatory functions of neutrophils, macrophages,
dendritic cells, and lymphocytes are suppressed.
21. IV- Immunosuppressive antibodies:
1. Polyclonal anti bodies : (ALG,ATG)
they are a heterologous polyclonal antibodies are obtained from the
serum of animals (e.g., horse, rabbit,) and injected with the patient's
Thymocytes or Lymphocytes.
The antilymphocyte (ALG]) and antithymocyte antigens (ATG) are
being used.
MOA: They inhibit T lymphocytes and cause their lysis >> inhibit cell-
mediated immune reactions, including graft rejection, and the graft-versus-
host disease (GVHD) .
SE : Due to their high immunogenicit almost all patients have an acute reaction to
the treatment. As (fever, and even anaphylaxis).
• Later during the treatment, fever, joint pain, and erythema ( steroids and analgesics) .
• It is possible to diminish their toxicity by taking intravenous administration in the
combination with other immunosuppressants, for example, calcineurin inhibitors,
cytostatics and cortisteroids.
• Need hospitilization (3Weaks) as it cause general immunosuppression & may lead to
post-transplant lymphoproliferative disorders (PTLD) or serious infection.
22. 2- Monoclonal antibodies
They are more specific (defined antigens), less SE.
They are used to prevent the rejection of transplanted
organs.
There are several MABs mechanism of action .
1. Anti-CD3 MABs.(eg, Muromonab-CD3)
2. Anti-IL-2 receptor (Anti-CD25) antibodies.(eg,
Daclizumab, Basiliximab)
3. Anti-TNF reagents.(eg, Adalimumab,Etanercept,
Infliximab)
4. IL-1 Inhibition. ( eg, Anakinra)
23. 1-Anti-CD3 MABs:
Muromonab-CD3 (OKT3) :
By Blocking the Cytotoxic human T-cell (CTL)action and other
T-cell function
MOA:
It acts bind to T-cell surface protein CD3 thes complex
prevents antigen recognition, cell signaling(deplation of T-
cell).
USES:
• Autoimmun dieseas and transplantation setting .
• Ttt Acute renal allograft rejection , steroid resistant acute
cardiac & renal rejection .
24. 2-Anti-IL-2 receptor antibodies.
• Daclizumab (humanized AB) & Basiliximab (chimeric AB) :
MOA: It bind to the IL-2 receptor (CD25) on the surface of T-
cells prevent binding to activated lymphocytes .
Uses :
• As prophylaxis of acute organ rejection pt.
• It can be combined with others (CSA & glucocorticoids )
25. 3-Anti-TNF reagents:
• TNF-T is a proinflammatory cytokine that is important im RA and similar
disease .
By binding to TNF receptors it suppress inflammatory cytokines (IL-1,IL-6)
and decrease leucocyte activation and migration .
Infliximab It binds with high affinity to TNF-α and prevents the cytokine
from binding to its receptors.
Uses treating the symptoms of RA .
In combination with methotrexate in patients who do not respond to methotrexate
alone.
Infliximab also is approved for treatment of symptoms of Crohn disease, ankylosing
spondylitis, plaque psoriasis, psoriatic arthritis, and ulcerative colitis .
SE :
fever, urticaria,hypotension, and dyspnea within 1-2 h after adminstration
26. Etanercept : It binds to TNF-α, and prevents it from interacting with its
receptors.
Uses :
It is approved for treatment of the symptoms of RA, ankylosing spondylitis..
In combination with methotrexate in patients who have not responded
adequately to methotrexate alone.
SE: Ireactions (i.e., erythema, itching, pain, or swelling) have occurred.
All anti-TNF agents (i.e., infliximab, etanercept, adalimumab) increase
the risk for serious infections, lymphomas, and other malignancies.
27. 4-IL-1 Inhibition:
Plasma IL-1 levels are increased in patients with active inflammation .
Anakinra is an FDA-approved for the management of joint disease in
rheumatoid arthritis.
It can be used alone or in combination with anti-TNF agents such as
etanercept,infliximab, or adalimumab.