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USMLE Step 1 Immuno
DIT Immuno
83
Medical
Graduate
05/12/2010

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Cards

Term
CD Marker? Expressed only by helper T cells
Definition
CD4
Term
CD Marker? Expressed by cytotoxic T cells and suppressor T cells
Definition
CD8
Term
CD Marker? Found on all T cells except NK cells
Definition
CD3
Term
CD Marker? Used to identify B cells
Definition
CD19, CD20, CD21
Term
CD Marker? Found on all NK cells and binds to the constant region of IgG
Definition
CD16
Term
CD Marker? Inhibits complement C9 binding (protects against complement-mediated damage
Definition
CD55, CD59
Term
CD Marker? Endotoxin receptor found on macrophages
Definition
CD14
Term
What cytokine(s)? promotes B cell growth and differentiation
Definition
IL-4, IL-5
Term
What cytokine(s)? Produced by Th-1 cells
Definition
IL-2, IFN-gamma
Term
What cytokine(s)? Produced by Th-2 cells
Definition
IL-4, IL-5, IL-10
Term
What cytokine(s)? Involved in growth and activation of eosinophils
Definition
IL-5
Term
What cytokine(s)? Secreted by helper T cells and ACTIVATES MACROPHAGES
Definition
IFN-gamma
Term
What cytokine(s)? Inhibits macrophage activation
Definition
IL-10
Term
What cytokine(s)? Pyogens secreted by monocytes and macrophages
Definition
IL-1, IL-6, TNF-alpha (acute phase cytokines)
Term
What cytokine(s)? Inhibits the production of Th-1 cells
Definition
IL-10
Term
What cytokine(s)? Inhibits the production of Th-2 cells
Definition
IFN-gamma
Term
What cytokine(s)? Mediates inflammation
Definition
IL-1, IL-6, TNF-alpha
Term
What cytokine(s)? Enhances synthesis of IgE and IgG
Definition
IL-4
Term
What cytokine(s)? Enhances synthesis of IgA
Definition
IL-5
Term
What cytokine(s)? Released by virally infected cells
Definition
IFN-alpha, IFN-beta
Term
What cytokine(s)? Supports growth and differentiation of bone marrow stem cells
Definition
IL-3, GM-CSF
Term
What cytokine(s)? Supports T cell proliferation, differentiation, and activation
Definition
IL-2
Term
Immunoglobulin isotype? comprises 70-75% of total immunoglobulin pool
Definition
IgG
Term
Immunoglobulin isotype? Present in large quantities on the membrane of many B cells
Definition
IgD, IgM
Term
Immunoglobulin isotype? Can occur as a dimer
Definition
IgA
Term
Immunoglobulin isotype? Largely confined to intravascular pool and is the predominant early ab seen in response to infectious organisms w/ complex antigens
Definition
IgM
Term
Immunoglobulin isotype? Distributed evenly b/w intravascular and extravascular pools
Definition
IgG
Term
Hypersensitivity Rxn? Post-streptococcal glomerulonephritis
Definition
III
Term
Hypersensitivity Rxn? asthma
Definition
I
Term
Hypersensitivity Rxn? Rheumatic fever
Definition
II
Term
Hypersensitivity Rxn? SLE
Definition
III
Term
Hypersensitivity Rxn? Tuberculous skin test (PPD)
Definition
IV
Term
Hypersensitivity Rxn? allergies, anaphylaxis, and hay fever
Definition
I
Term
Hypersensitivity Rxn? Polyarteritis nodosa
Definition
III
Term
Hypersensitivity Rxn? serum sickness
Definition
III
Term
Hypersensitivity Rxn? ABO blood type incompatibility
Definition
II
Term
Hypersensitivity Rxn? Poison Ivy
Definition
IV
Term
Hypersensitivity Rxn? Eczema
Definition
I
Term
Hypersensitivity Rxn? Contact dematitis
Definition
IV
Term
Hypersensitivity Rxn? Goodpasture's Syndrome
Definition
II
Term
Which complement is responsible for neutrophil chemotaxis?
Definition
C5a
Term
Child presents w/ tetany f/ hypOcalcemia and candidiasis. Dx?
Definition
T Cell deficiency (DiGeorge)
Term
What is the deficient enzyme in Chronic Granulomatous Dz?
Definition
NADPH oxidase
Term
Immunodeficiency Dz? X-linked B cell deficiency, low Ig's, recurrent bacterial infxns
Definition
Bruton's Agammaglobulinemia
Term
What gene is defective in Bruton's Agammaglobulinemia?
Definition
Defective Tyrosine Kinase gene
Term
Immunodeficiency Dz? No T cells, hypOcalcemia/tetany, congenital heart/great vessel defects, recurrent fungal/viral/protozoal infxns
Definition
Thymic aplasia (DiGeorge)
Term
What embryonic pouches fail to develop in DiGeorge Syndrome?
Definition
3rd and 4th pouches....no thymus, no T cells
Term
What chromosomal deletion is present in 90% of DiGeorge pts?
Definition
22q11 (detect w/ FISH)
Term
Immunodeficiency Dz? What is the presentation triad of SCID?
Definition
1. Severe recurrent infxns (B and T cell deficiency)
2. Chronic diarrhea
3. Failure to thrive
Term
What 2 immunodeficiency dzs have no thymic shadow on CXR?
Definition
DiGeorge and SCID
Term
Immunodeficiency Dz? What is the deficient cell type in Chronic Mucocutaneous Candidiasis? What is the Tx?
Definition
T cell dysfxn, Treat w/ ketoconazole
Term
What are the 3 always X-linked immunodeficiencies? ("WBC")
Definition
W- Wiskott-Aldrich
B- Bruton's Agammaglobulinemia
C- Chronic Granulomatous Dz
Term
What are the "WAITER" components of Wiskott-Aldrich Syndrome?
Definition
W-A-I- Wiskott-Aldrich Immunodeficiency
T- Thrombocytopenia and Purpura
E- Eczema (central, not extensors)
R- Recurrent pyogenic infxns
.......low IgM, high IgA
Term
What is the most common selective immunoglobulin deficiency and why is it important to diagnose?
Definition
IgA deficiency is most common. Pts are susceptible to sinus and lung problems, but usu don't know they have the deficiency. Should be dx bc can have anaphylaxis to blood transfusions and blood products
Term
What Ig is deficient in Ataxia-telangiectasia? What are pts at increased risk for?
Definition
IgA deficiency, pts at increased risk for lymphoma and acute leukemias
Term
Immunodeficiency Dz? Poor smooth pursuit of moving target w/eyes, radiation sensitivity (defective DNA repair), possibly increased alpha-fetoprotein
Definition
Ataxia-telangiectasia
Term
What cytokine receptor is deficient in mycobacterial infxn susceptibility?
Definition
IL-12 receptor deficiency
Term
What are the 4 major phagocyte deficiencies?
Definition
1. Chronic Granulomatous Dz
2. Chediak-Higashi Dz
3. Job's Syndrome
4. Leukocyte Adhesion Deficiency
Term
What types of bacteria are pts w/ CGD especially susceptible to?
Definition
Catalase (+) bacteria (staph aureus, e.coli, klebsiella, aspergillus, candida)
Term
What do you diagnose Chronic Granulomatous Dz with?
Definition
Nitroblue Tetrazolium (NBT) dye...Does NOT change f/ yellow --> black like it should bc there is no oxidation
Term
Immunodeficiency Dz? Defective LYST gene (Lysosomal Transport)
Definition
Chediak-Higashi
Term
What is the diagnostic cytology of Chediak Higashi Dz?
Definition
Giant cytoplasmic granules in PMN's (defecttive phagocyte lysosome)
Term
What is the presentation triad of Chediak-Higashi Dz?
Definition
1. Partial albinism
2. Recurrent respiratory tract and skin infxn
3. Neurologic d/o's
Term
What is another name for Job's Syndrome?
Definition
Hyperimmunoglobulin E syndrome
Term
Immunodeficiency Dz? Deficient IFN-gamma, PMN's fail to respond to chemotactic stimuli (C5a, LTB4)
Definition
Job's (hyper IgE) syndrome
Term
What is the presentation triad of Job's Syndrome?
Definition
1. Eczema
2. staph aureus COLD abcesses
3. coarse facies (broad nose, "doughy" skin, prominant forehead, etc)
Term
What is unusual about the mouths of people with Job's syndrome?
Definition
They retain their primary teeth, so they may have 2 rows of teeth (it is a "JOB" to take all those teeth out!)
Term
Immunodeficiency Dz? Retained umbilical stump
Definition
Leukocyte Adhesion Deficiency
Term
What protein is deficient in Leukocyte Adhesion Deficiency?
Definition
Abnormal INTEGRINS...inability of phagocytes to exit circulation and enter interstitium
Term
What 3 drugs are composed of antibodies against TNF?
Definition
1. Etanercept
2. Infliximab
3. Adalimunab
Term
After bone marrow transplant, pt suffers f/ dermatitis, enteritis, and hepatitis...what dz process is occuring?
Definition
Graft-versus-host dz (GVHD)
Term
In what dz would you see anti-mitochondrial antibodies?
Definition
Primary biliary cirrhosis
Term
Which CD's are deficient in Paroxysmal Nocturnal Hemoglobinuria?
Definition
CD55, CD59 (complement mediated lysis of RBC's = PNH)...deficiency in DAF (Decay Accelerating Factor)
Term
Deficiency of what complements lead to susceptibility to Neisseria infxns?
Definition
C5-C8
Term
What activates the Classic Complement pathway?
Definition
Antigen-antibody complexes
Term
What activates the alternative pathway?
Definition
microbes/microbial surfaces
Term
How does Ham's Test work and what is it used to diagnose?
Definition
RBC lysis at low PH. Used to dx Paroxysmal Nocturnal Hemoglobinuria
Term
Name 4 phagocyte deficiencies
Definition
1. Leukocyte Adhesion Deficiency
2. Chediak Higashi
3. Chronic Granulomatous Dz
4. Job's Syndrome (HyperIgE)
Term
Name 3 X-linked immunodeficiencies
Definition
"WBC" Wiskott Aldrich, Bruton's Agammaglobulinemia, CGD
Term
What immunodeficiency? neutrophils fail to respond to chemotactic stimuli
Definition
LAD (Leukocyte Adhesion Deficiency) or Job's (HyperIgE)
Term
What immunodeficiency? Adenosine Deaminase Deficiency
Definition
SCID
Term
What immunodeficiency? Failure of endodermal development
Definition
DiGeorge
Term
What immunodeficiency? Defective tyrosine kinase gene
Definition
Bruton's Agammaglobulinemia
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