Immuno Flashcards
HLA A3
Hemochromatosis
HLA B27
PAIR - Psoriasis, Ankylosing spondylitis, Inflammatory bowel disease, Reiter’s syndrome
HLA DQ2.DQ8
Celiac disease
HLA DR2
MS, hay fever, SLE, Goodpasture’s
HLA DR3
DM Type I, Graves’ disease
HLA DR4
DM Type I, RA
HLA DR5
Pernicious anemia -> B12 deficiency, Hashimoto’s Thyroiditis
Upper limb/lateral breast
axillary nodes
Stomach
Celiac nodes
Dudoenum/Jejunum
SMA nodes
Sigmoid colon
Colic -> IMA nodes
Rectum (lower) and anal canal (above pectinate line)
Internal iliac nodes
Anal canal (below pectinate line)
Superficial inguinal nodes
Testes/ovaries
Paraortic nodes
Scrotum
Superficial inguinal nodes
Thigh (superficial)
Superficial inguinal nodes
Lateral side of dorsum of foot
Popliteal nodes
C3b
opsonization
C3a, C5a
Anaphylaxis
C5a
neutrophil chemotaxis
C5b-C9
cytolysis by MAC
CD16, CD56
NK cells
CD25, CD3, CD4
Regulatory T cells
Severe, recurrent pyogenic sinus and respiratory tract infections (S. pneumo, H. influenzae), Inc susceptibility to Type III hypersensitivity (esp. gloerulonephritis)
C3 deficiency
Defect in BTK (tyrosine kinase) -> no B cell maturation; recurrent bacterial infections after 6 months; dec immunoglobulins of all classes
X-linked (Bruton’s) agammaglobulinemia
Most common primary immunodeficiency; False-positve beta-hCG due to presence of heterophile Ab; sinopulmonary infections
Selective IgA deficiency
Tetany, recurrent vital/fungal infection, congenital and heart and great vessel disease
Thymic aplasia (DiGeorge)
Dec TH1 response; disseminated mycobacterial infections, dec IFN-gamma
IL-12 deficiency
Eczema, reccurrent staph abscesses, coarse facial features
Hyper-IgE (Job’s) - inability of neutrophils to respond to chemotactic stimuli due to TH1 cells failing to produce IFN-gamma
Defective IL-2 receptor; adenosine deaminase deficiency; absence of thypic shadow
SCID
Failure to thrive, chronic diarrhea, recurrent infections (candida, RSV, VZV, HSV, measles, flu, parainfluenza)
SCID
Defects in ATM gene which codes for DNA repair enzymes; cerebellar defects, spider angiomas; IgA deficiency; Inc AFP
Ataxia-Telengectasia
Usually defective CD40L on T cells -> inability to class switch; Inc IgM, dec IgG/IgA/IgE; X-linked
Hyper-IgM syndrome
WAS gene; T cells unable to reorganize actin cytoskeleton; Inc IgA, dec IgM; X-linked
Wiskott-Aldrich syndrome
Thrombocytopenic purpura, Infections, Ezema
Wiskott-Aldrich syndrome
Defect in LFA-1 integrin (CD18); recurrent bacterial infections w/ absent pus formationl delayed separation of umbilical cord; neutrophilia
Leukocyte adhesion deficiency (type 1) - neutrophils fail to respond to chemotactic stimuli
Defect in lysosomal trafficking regulator gene (LYST); microtubule dysfunction; giant granules in neutrophihls
Chediak-Higashi syndrome
Partial albinism, neurological defects, recurrent pyogenic infections
Chediak-Higashi syndrome
Lack of NADPH oxidase -> dec reactive oxygen species; inc susceptibility to catalase-positive organisms (S. aureus, E. Coli, Aspergillus, Pseudomonas, Nocardia, Serratia); Abnormal dihydrorhodamine (DHR) flow cytometry test; Negative nitroblue tetrazolium dye test; X-linked
Chronic granulomatous disease
CD 14, CD 40, MHC II, B7
Macrophages
CD19, CD20, CD21, MHC II, B7
B-cells
CD4, CD40L
Helper T cells
CD8
Cytotoxic T cells