Hypersensitivity (also called hypersensitivity reaction or intolerance) refers to undesirable reactions produced by the normal immune system, including allergies and autoimmunity.
There is no cure for hypersensitivity vasculitis itself. The main goal of treatment will be to relieve your symptoms.
this chart is all about hypersensitivity , i made this for my academic purpose .
please comment
thank u
Hypersensitivity (also called hypersensitivity reaction or intolerance) refers to undesirable reactions produced by the normal immune system, including allergies and autoimmunity.
Hypersensitivity (also called hypersensitivity reaction or intolerance) refers to undesirable reactions produced by the normal immune system, including allergies and autoimmunity.
Through this presentation you will be able to learn detailed information about hypersensitivity reactions, its type and clinical manifestation of all types of hypersensitivity reactions and related diseases.
The symptoms resulting from allergic responses are known as anaphylaxis.
Mediated by IgE attached to Mast cells.
Includes: Hay fever, asthma, eczema, bee stings, food allergies.
Through this presentation you will be able to learn detailed information about hypersensitivity reactions, its type and clinical manifestation of all types of hypersensitivity reactions and related diseases.
The symptoms resulting from allergic responses are known as anaphylaxis.
Mediated by IgE attached to Mast cells.
Includes: Hay fever, asthma, eczema, bee stings, food allergies.
Hypersensitivity/ Allergy ppt by DR.C.P.PRINCEDR.PRINCE C P
Hypersensitivity refers to undesirable reactions produced by the normal immune system, including allergies .
These reactions may be damaging, uncomfortable, or occasionally fatal.
ALLERGEN: non-parasite antigens that can stimulate a hypersensitivity response
Occurs in two stages : sensitization phase and shocking phase
Classified into Immediate and Delayed hypersensitivity based on time required to develop the symptoms
Type I hypersensitivity is also known as immediate or anaphylactic hypersensitivity.
The reaction may involve skin(urticaria and eczema), eyes(conjunctivitis), nasopharynx (rhinorrhea, rhinitis), bronchopulmonary tissues(asthma) and gastrointestinal tract (gastroenteritis).
1. Type I Hypersensitivity:
Type I hypersensitive reactions are the commonest type among all types which is mainly induced by certain type of antigens i.e. allergens. Actually anaphylaxis means “opposite of protection” and is mediated by IgE antibodies through interaction with an allergen
Introduction
Hypersensitivity is increased reactivity or increased sensitivity by the animal body to an antigen to
which it has been previously exposed.
The term is often used as a synonym for allergy, which describes a state of altered reactivity to an
antigen.
Hypersensitivity has been divided into categories based upon whether it can be passively transferred
by antibodies or by specifically immune lymphoid cells.
The most widely adopted current classification is that of Coombs and Gell that designates
immunoglobulin-mediated (immediate) hypersensitivity reactions as types I, II, and III, and
lymphoid cell-mediated (delayed-type) hypersensitivity/cell-mediated immunity as a type IV
reaction.
“Hypersensitivity” generally represents the “dark side,” signifying the undesirable aspects of an
immune reaction, whereas the term “immunity” implies a desirable effect.
A hypersensitive response (HR) is an anti-pathogen response in plants produced by avr-R system
activation that leads to alterations in Ca+ flux, MAPK activation, and NO and ROI formation.
There is rapid necrosis of plant cells in contact with the pathogen.
This process prevents spread of the pathogen and releases hydrolytic enzymes that facilitate injury to
the pathogen’s structural integrity.
Causes of Hypersensitivity
Immune responses that are the cause of hypersensitivity diseases may be specific for antigens from different
sources:
Autoimmunity: reactions against self antigens.
Reactions against microbes.
Reactions against non-microbial environmental antigens.
Mechanism of Hypersensitivity
Hypersensitivity diseases are commonly classified according to the type of immune response and the
effector mechanism responsible for cell and tissue injury. These mechanisms include some that are
predominantly dependent on antibodies and others predominantly dependent on T cells, although a role for
both humoral and cell-mediated immunity is often found in many hypersensitivity diseases.
this is brief study describes the aspects of iv cannulation for students and aspirants , this slide briefly comprises all the major aspects of cannulation .......................
thank you
martinsuja369@gmail.com
Wilsons disease- A brief medical study. martinshaji
this brief study describes all the basic aspects of Wilsons disease , including management. as this is a congenital abnormality associated with severe complications on the future proper diagnosis management , and lifestyle modifications , …..surgical options are also needed ,if necessary .
thank you
martinsuja369@gmail.com
Communicable diseases and causative agents- a detailed chart martinshaji
A communicable disease is one that is spread from one person to another through a variety of ways that include contact with blood and bodily fluids; breathing in an airborne virus or by being bitten by an insect................................................................this chart provides a clear idea regarding almost all communicable disease and their causative agents
thank you ...............
martinsuja369@gmail.com
TDM of drugs used in organ transplantation-detailed studymartinshaji
Therapeutic drug monitoring (TDM) is testing that measures the amount of certain medicines in your blood. It is done to make sure the amount of medicine you are taking is both safe and effective. Most medicines can be dosed correctly without special testing. the slide explain all the tdm aspects of the drug in detail / Therapeutic drug monitoring (TDM) is testing that measures the amount of certain medicines in your blood. It is done to make sure the amount of medicine you are taking is both safe and effective. Most medicines can be dosed correctly without special testing.
martinsuja369@gmail.com
inbox for queries and more explanatory study materials
Organophosphate poisoning - a brief toxicological study martinshaji
this is a brief study on organophosphate poisoning , as it being more common problem in the health sector and emergency medicine now a days , this will be much helpful among health professionals .........text me for more topics
martinsuaj369@gmail.com
thank you
this case study describes about maxillofacial trauma , which details about the treatment, management , diagnosis, surgical options, patient counselling, pharmacist interventions & discussions are followed in this case .
please comment
thank u
martinsuja369@gmail.com
Sleep disorders - a brief medical study martinshaji
A sleep disorder is any condition that involves difficulty experienced when sleep , such disorders involve daytime fatigue causing severe distress and impairment to work.
SD also have an impact upon social and personal functioning
this is a brief study on all aspects of this ...............
please comment
thank you
for any detailed suggestions and for any medical study materials connect with me
martinsuja369@gmail.com
than you
A case study on Pangastritis with pancreatitis martinshaji
this case study describes about Pangastritis with pancreatitis , which details about the treatment, management , diagnosis, patient counselling, pharmacist interventions & discussions are followed in this case .
please comment
thank u
martinsuja369@gmail.com
Blood transfusion-MANAGEMENT FOR PEOPLE LIVING WITH SICKLE CELL DISORDER/DISE...martinshaji
Sickle cell disease is caused by a genetic mutation that leads to the production of abnormal hemoglobin known as sickle hemoglobin . Blood transfusion is the transfer of blood from one individual to another ..
Red blood cell transfusions help lessen anemia and reduce the blood’s viscosity, allowing it to flow more freely and ease disease symptoms.
this is a brief study
please comment
thank you
martinsuja369@gmail.com
Compartment syndrome,- a detailed medical study .martinshaji
Compartment syndrome is a condition that occurs when injury causes generalized painful swelling and increased pressure within a compartment to the point that blood cannot supply the muscles and nerves with oxygen and nutrients. Muscles in the forearm, lower leg and other body areas are surrounded by fibrous bands of tissues. This creates distinct compartments. The fibrous tissue is very inflexible and cannot stretch to accommodate the generalized swelling. If left untreated, muscles and nerves fail and may eventually die.
hence this is a medical emergency needed fast and great medical supervision , his study provides a detailed information regarding compartment syndrome
please comment
thank you
martinsuja369@gamil.com
Muscles -A LONG CHART ON IMAGES OF DIFFERENT MUSCLES- Myology|, kinesiology- ...martinshaji
this is a long chart on different types of muscles of human body with its images , this will be helpful for medical academics and better understanding , along with its names
please comment
thank you
martinsuja369@gamil.com
P h value- a long chart on different ph. values martinshaji
pH is a measure of how acidic/basic water is. The range goes from 0 - 14, with 7 being neutral. pHs of less than 7 indicate acidity, whereas a pH of greater than 7 indicates a base. pH is really a measure of the relative amount of free hydrogen and hydroxyl ions in the water .
this is a long chart on ph value of different substances
please comment
thank you
martinsuja369@gamil.com
12 basic facts about tetracyclines - medical information martinshaji
Tetracyclines are a class of broad-spectrum antibiotics used in the management and treatment of a variety of infectious diseases. Naturally occurring drugs in this class are tetracycline, chlortetracycline, oxytetracycline, and demeclocycline. used to treat infections caused by susceptible microorganisms such as gram positive and gram negative bacteria, chlamydiae, mycoplasmata, protozoans, or rickettsiae.
please comment
thank you
martinsuja369@gamil.com
8 signs and symptoms of breast cancer you - medical information martinshaji
After skin cancer, breast cancer is the most common cancer diagnosed in women in the United States. hence it is necessary to know its major symptoms which will help you to avoid a life threatening condition easily .....
please comment
thank you
How to have a Clear Skin....HEALTH INFORMATION martinshaji
Clear skin is possible for everyone if you follow a basic good skincare routine for your unique skin type. these are some common methods for having good clear skin on considering medical aspects ,
please comment
thank you ........
Liver failure is a life-threatening condition that demands urgent medical care.
Alcoholic liver disease (ALD) is a leading cause of cirrhosis, liver cancer, and acute and chronic liver failure and as such causes significant morbidity and mortality.
this is a brief study on liver failure and associated liver conditions and stages of conditions ,
please comment
thank you ........
martinsuja369@gmail.com
Natural ways to build healthy bones - health information martinshaji
Bone health is important throughout life. While you can never regain the bone density you had in your youth, you can help prevent rapidly thinning bones, even after your diagnosis. Calcium is a crucial building block of bone tissue. Vitamin D helps the body absorb and process calcium. Together, these two nutrients are the cornerstone of healthy bones.
this is a brief study for healthy bones .................................................
for any doubts or questions you can mail me @
martinsuja369@gmail.com
please comment
thank you
Sleep According To your Age-health information | images martinshaji
Sleep plays an important role in your physical health. For example, sleep is involved in healing and repair of your heart and blood vessels.
please comment
thank you.....
Doctors once thought bony growths called heel spurs brought on the pain. Now they believe that heel spurs are the result -- not the cause -- of plantar fasciitis.
Plantar fasciitis is inflammation of the thick band of tissue (also called a fascia) at the bottom of your foot that runs from your heel to your toes.
this is a brief study on plantar fasciitis
please comment
thank you
Anti ulcer drugs and their Advance pharmacology ||
Anti-ulcer drugs are medications used to prevent and treat ulcers in the stomach and upper part of the small intestine (duodenal ulcers). These ulcers are often caused by an imbalance between stomach acid and the mucosal lining, which protects the stomach lining.
||Scope: Overview of various classes of anti-ulcer drugs, their mechanisms of action, indications, side effects, and clinical considerations.
- Video recording of this lecture in English language: https://youtu.be/lK81BzxMqdo
- Video recording of this lecture in Arabic language: https://youtu.be/Ve4P0COk9OI
- 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
The prostate is an exocrine gland of the male mammalian reproductive system
It is a walnut-sized gland that forms part of the male reproductive system and is located in front of the rectum and just below the urinary bladder
Function is to store and secrete a clear, slightly alkaline fluid that constitutes 10-30% of the volume of the seminal fluid that along with the spermatozoa, constitutes semen
A healthy human prostate measures (4cm-vertical, by 3cm-horizontal, 2cm ant-post ).
It surrounds the urethra just below the urinary bladder. It has anterior, median, posterior and two lateral lobes
It’s work is regulated by androgens which are responsible for male sex characteristics
Generalised disease of the prostate due to hormonal derangement which leads to non malignant enlargement of the gland (increase in the number of epithelial cells and stromal tissue)to cause compression of the urethra leading to symptoms (LUTS
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.
Follow us on: Pinterest
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
Flu Vaccine Alert in Bangalore Karnatakaaddon Scans
As flu season approaches, health officials in Bangalore, Karnataka, are urging residents to get their flu vaccinations. The seasonal flu, while common, can lead to severe health complications, particularly for vulnerable populations such as young children, the elderly, and those with underlying health conditions.
Dr. Vidisha Kumari, a leading epidemiologist in Bangalore, emphasizes the importance of getting vaccinated. "The flu vaccine is our best defense against the influenza virus. It not only protects individuals but also helps prevent the spread of the virus in our communities," he says.
This year, the flu season is expected to coincide with a potential increase in other respiratory illnesses. The Karnataka Health Department has launched an awareness campaign highlighting the significance of flu vaccinations. They have set up multiple vaccination centers across Bangalore, making it convenient for residents to receive their shots.
To encourage widespread vaccination, the government is also collaborating with local schools, workplaces, and community centers to facilitate vaccination drives. Special attention is being given to ensuring that the vaccine is accessible to all, including marginalized communities who may have limited access to healthcare.
Residents are reminded that the flu vaccine is safe and effective. Common side effects are mild and may include soreness at the injection site, mild fever, or muscle aches. These side effects are generally short-lived and far less severe than the flu itself.
Healthcare providers are also stressing the importance of continuing COVID-19 precautions. Wearing masks, practicing good hand hygiene, and maintaining social distancing are still crucial, especially in crowded places.
Protect yourself and your loved ones by getting vaccinated. Together, we can help keep Bangalore healthy and safe this flu season. For more information on vaccination centers and schedules, residents can visit the Karnataka Health Department’s official website or follow their social media pages.
Stay informed, stay safe, and get your flu shot today!
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.
HOT NEW PRODUCT! BIG SALES FAST SHIPPING NOW FROM CHINA!! EU KU DB BK substit...GL Anaacs
Contact us if you are interested:
Email / Skype : kefaya1771@gmail.com
Threema: PXHY5PDH
New BATCH Ku !!! MUCH IN DEMAND FAST SALE EVERY BATCH HAPPY GOOD EFFECT BIG BATCH !
Contact me on Threema or skype to start big business!!
Hot-sale products:
NEW HOT EUTYLONE WHITE CRYSTAL!!
5cl-adba precursor (semi finished )
5cl-adba raw materials
ADBB precursor (semi finished )
ADBB raw materials
APVP powder
5fadb/4f-adb
Jwh018 / Jwh210
Eutylone crystal
Protonitazene (hydrochloride) CAS: 119276-01-6
Flubrotizolam CAS: 57801-95-3
Metonitazene CAS: 14680-51-4
Payment terms: Western Union,MoneyGram,Bitcoin or USDT.
Deliver Time: Usually 7-15days
Shipping method: FedEx, TNT, DHL,UPS etc.Our deliveries are 100% safe, fast, reliable and discreet.
Samples will be sent for your evaluation!If you are interested in, please contact me, let's talk details.
We specializes in exporting high quality Research chemical, medical intermediate, Pharmaceutical chemicals and so on. Products are exported to USA, Canada, France, Korea, Japan,Russia, Southeast Asia and other countries.
Prix Galien International 2024 Forum ProgramLevi Shapiro
June 20, 2024, Prix Galien International and Jerusalem Ethics Forum in ROME. Detailed agenda including panels:
- ADVANCES IN CARDIOLOGY: A NEW PARADIGM IS COMING
- WOMEN’S HEALTH: FERTILITY PRESERVATION
- WHAT’S NEW IN THE TREATMENT OF INFECTIOUS,
ONCOLOGICAL AND INFLAMMATORY SKIN DISEASES?
- ARTIFICIAL INTELLIGENCE AND ETHICS
- GENE THERAPY
- BEYOND BORDERS: GLOBAL INITIATIVES FOR DEMOCRATIZING LIFE SCIENCE TECHNOLOGIES AND PROMOTING ACCESS TO HEALTHCARE
- ETHICAL CHALLENGES IN LIFE SCIENCES
- Prix Galien International Awards Ceremony
2. Type I
IgE Mediated
Classic Allergy
Type II
IgG/IgM
Mediated
rbc lysis
Type III
IgG Mediated
Immune
complex
Disease
Type IV
T cell
Delayed
Type
Hypersensitivity
Gel and Coombs classification of hypersensitivities.
3. TYPE I Hypersensitivity
Classic allergy
Mediated by IgE attached to Mast cells.
The symptoms resulting from allergic responses are known as anaphylaxis.
Includes: Hay fever, asthma, eczema, bee stings, food allergies.
4. Allergens
Allergens are nonparasite antigens that can stimulate a type I
hypersensitivity response.
Allergens bind to IgE and trigger degranulation of chemical
mediators.
6. Characteristics of allergens
Small 15-40,000 MW proteins.
Specific protein components
Often enzymes.
Low dose of allergen
Mucosal exposure.
Most allergens promote a Th2 immune.
8. Allergen is easily aerosolized and inhaled.
Der P1 breaks down components of tight junctions
which helps it to cross mucosa.
Der P1 Allergen
9. Atopy
Atopy is the term for the genetic trait to have a predisposition for localized
anaphylaxis.
Atopic individuals have higher levels of IgE and eosinophils.
10. Genetic Predisposition
Type I hypersensitivity
Candidate polymorphic genes include:
IL-4 Receptor.
IL-4 cytokine (promoter region).
FceRI. High affinity IgE receptor.
Class II MHC (present peptides promoting Th2
response).
Inflammation genes.
11. Mechanisms of allergic response
Sensitization
Repeated exposure to allergens initiates immune response that
generates IgE isotype.
Th2 cells required to provide the IL-4 required to get isotype
switching to IgE.
12. Mechanisms of allergic response
Sensitization
Th2/B cell interaction
IL-4
IL-4R
CD40
Drive B cell
Activation and IgE
isotype switch.
Busse and Lemanske NEJM Feb 2001. 344:350
13. Mechanisms of allergic response
Sensitization
The IgE can attach to Mast cells by Fc receptor, which increases
the life span of the IgE.
Half-life of IgE in serum is days whereas attached to FceR it is
increased to months.
14. Mechanisms of allergic response
Fc e receptors (FceR)
FceR1
high affinity IgE receptor found on
mast cells/basophils/activated eosinophils.
Allergen binding to IgE attached to FceR1 triggers release of
granules from cell.
16. Mechanisms of allergic response
Effector Stage of Hypersensitivity
Secondary exposure to allergen
Mast cells are primed with IgE on surface.
Allergen binds IgE and cross-links to activate signal with tyrosine phosphorylation,
Ca++ influx, degranulation and release of mediators.
17. FceRI Triggers Release of Mediators
Early mediators
cause immediate symptoms
e.g. histamine (preformed in granules)
leukotriene C4 and prostaglandin D2
are quickly made 2' mediators
18. Mediators of Type I Hypersensitivity
Immediate effects
Histamine
Constriction of smooth muscles. Bronchiole constriction = wheezing.
Constriction of intestine = cramps-diarrhea.
Vasodilation with increased fluid into tissues causing increased swelling or fluid in
mucosa.
Activates enzymes for tissue breakdown.
Leukotrienes
Prostaglandins
19. Immediate vs Late Effects
(early mediators)
Early/Late
Effect on lung
airflow
OR
Wheezing
20. Mediators of Type I Hypersensitivity
Primary Mediators
Pre-formed mediators in granules
Histamine
Cytokines TNF-a, IL-1, IL-6.
Chemoattractants for Neutrophils and Eosinophils.
Enzymes
tryptase, chymase, cathepsin.
Changes in connective tissue matrix, tissue breakdown.
21. Type I Hypersensitivity
Secondary mediators
Mediators formed after activation
Leukotrienes
Prostaglandins
Th2 cytokines- IL-4, IL-5, IL-13, GM-CSF
22. Continuation of sensitization cycle
Mast cells control the immediate response.
Eosinophils and neutrophils drive late or chronic response.
More IgE production further driven by activated Mast cells,
basophils, eosinophils.
23. Continuation of sensitization cycle
Eosinophils
Eosinophils play key role in late phase reaction.
Eosinophils make
enzymes,
cytokines (IL-3, IL-5, GM-CSF),
Lipid mediators (LTC4, LTD4, PAF)
Eosinophils can provide CD40L and IL-4 for B cell activation.
24. Localized anaphylaxis
Target organ responds to direct contact with allergen.
Digestive tract contact results in vomiting, cramping, diarrhea.
Skin sensitivity usually reddened inflamed area resulting in
itching.
Airway sensitivity results in sneezing and rhinitis OR wheezing
and asthma.
25. Systemic anaphylaxis
Systemic vasodilation and smooth muscle contraction leading to
severe bronchiole constriction, edema, and shock.
Similar to systemic inflammation.
26. Treatment for Type I
Pharmacotherapy
Drugs.
Non-steroidal anti-inflammatories
Antihistamines block histamine receptors.
Steroids
Theophylline OR epinephrine -prolongs or increases cAMP levels in
mast cells which inhibits degranulation.
27. Treatment for Type I
Immunotherapy
Desensitization (hyposensitizat also known as allergy shots.
Repeated injections of allergen to reduce the IgE on Mast cells and
produce IgG.
28. Treatment for Type I
Effect of allergy shots
Allergen Specific Antibodies
Change in amount of
each isotope from more
IgE to more IgG.
29. TYPE II Hypersensitivity
Antibody mediated cytotoxicity
Blood Transfusion reactions
Innocuous antigens on red blood cells.
EXAMPLE: ABO blood group antigens
A and B
carbohydrate
antigens
30. Antibody against rbc antigen binds and
mediates killing of rbcs via C’or ADCC
causes systemic inflammation.
ABO Blood Groups
Quex: Why do we have antibodies to these
innocuous antigens even before we get blood transfusion?
31. TYPE II
Antibody mediated cytotoxicity
Drug reactions
Drug binds to rbc surface and antibody against drug binds and
causes lysis of rbcs.
Immune system sees antibody bound to "foreign antigen" on cell.
ADCC
32. Rh factor incompatibility
IgG abs to Rh an innocuous rbc antigen
Rh+ baby born to Rh- mother first time fine. 2nd time can have abs to Rh from
1st pregnancy.
Ab crosses placenta and baby kills its own rbcs.
Treat mother with ab to Rh antigen right after birth and mother never makes its
own immune response.
TYPE II
Hemolytic disease of newborn
34. TYPE III
Antigen antibody immune complexes.
IgG mediated
Immune Complex Disease
Large amount of antigen and antibodies form complexes in blood.
If not eliminated can deposit in capillaries or joints and trigger
inflammation.
35. TYPE III
Immune Complexes
PMNs and macrophages bind to immune complexes via
FcR and phagocytize the complexes.
BUT
If unable to phagocytize the immune complexes can
cause inflammation via C’ activation ---> C3a C4a, C5a
and "frustrated phagocytes".
36. TYPE III
Immune Complex Disease
"Frustrated Phagocytes"
If neutrophils and macrophages are unable to phagocytize the immune complexes
these cells will degranulate in the area of immune complex deposition and trigger
inflammation.
Unable to eat -------try to digest outside cell.
37. TYPE III
Immune Complex Disease
Localized disease
Deposited in joints causing local inflammation = arthritis.
Deposited in kidneys = glomerulonephritis.
38. TYPE III
Immune Complex Disease
Serum sickness from large amounts of antigen such as injection of foreign serum.
Serum sickness is usually transient immune complex disease
with removal of antigen source.
39. Serum Sickness
Systemic immune complex disease
Days after Antigen Injection
Large amounts of antigen
such as injection of
foreign serum.
40. Delayed type hypersensitivity
Th1 cells and macrophages
DTH response is from:
Th1 cells release cytokines to activate macrophages causing inflammation and tissue damage.
Continued macrophage activation can cause chronic inflammation resulting in tissue lesions,
scarring, and granuloma formation.
Delayed is relative because DTH response arise 24-72
hours after exposure rather than within minutes.
41. Stages of Type IV DTH
Sensitization stage
Memory Th1 cells against DTH antigens are generated by
dendritic cells during the sensitization stage.
These Th1 cells can activate macrophages and trigger
inflammatory response.
42. Stages of Type IV DTH
Effector stage
Secondary contact yields what we call DTH.
Th1 memory cells are activated and produce cytokines.
IFN-g, TNF-a, and TNF-b which cause tissue destruction, inflammation.
IL-2 that activates T cells and CTLs.
Chemokines- for macrophage recruitment.
IL-3, GM-CSF for increased monocyte/macrophage
43. Stages of Type IV DTH
Effector stage
Secondary exposure to antigen
Inflamed area becomes red and fluid filled can form lesion.
From tissue damage there is activation of clotting cascades and tissue repair.
Continued exposure to antigen can cause chronic inflammation and result in granuloma
formation.
44. Type IV DTH
Contact dermatitis
The response to poison oak is a classic Type IV.
Small molecules act as haptens and complex with skin proteins to be taken up by APCs and
presented to Th1 cells to get sensitization.
During secondary exposure Th1 memory cells become activated to cause DTH.
46. Delayed type hypersensitivity
(DTH)
DTH is a type of immune
response classified by
Th1 and macrophage
activation that results in
tissue damage.
DTH can be the result of
Chronic infection or
Exposure to some antigens.