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HLA subtypes
HLA subtypes associated with diseases USMLE
11
Medical
Graduate
06/03/2010

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Cards

Term
A3
Definition
Hemochromatosis
Term
B27
Definition
Ankylosing spondylitis, Psoriasis, IBD, Reiter's syndrome (uveitis, urethritis, ankylosing spondylitis (sacro-ileal enthesitis))
Term
B8
Definition
Graves' disease
Term
DR2
Definition
MS, SLE, Goodpasture's, hay fever
Term
DR3
Definition
DM type 1
Term
DR4
Definition
RA, DM type 1
Term
DR5
Definition
Pernicious anemia (B12 def), Hashimoto's thyroiditis
Term
DR7
Definition
Steroid-responsive nephrotic syndrome
Term
HLA (what is it, what does it do?)
Definition
Human Leukocyte Antigen genes, encode MHC which present antigen fragments to Tcells and bind TCR
Term
MHC I
Definition

HLA-A, HLA-B, HLA-C

(Almost) all nucleated cells

Presents mostly intracellular peptides

Antigen loaded in RER

Viral immunity

Pairs with beta2-microglobulin

which aids in txpt to cell surface

Term
MHC II
Definition
HLA-DR, HLA-DP, HAL-DQ
Only on APCs
Antigen loaded after release of invariant chain in acidifed endosome
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