Day 1 Flashcards
Class I MHC
Recognition of endogenous antigens
Class II MHC
Recognition of exogenous antigens
Class II MHC
involved in Complement system
B cells form?
Plasma cells that secrete immunoglobulin
CD8 = which MHC class?
Class 1
CD8 is which type of T cell?
Cytotoxic
CD4 cell = which MHC class?
Class II
CD4 is which type of T cell?
Helper T cell
Anergy
State of immunologic tolerance to Ag
ESR
Erythrocyte Sedimentation Rate
Increase w/ age and in women
Elevated in obesity
Which 2 conditions is ESR useful for?
Polymyalgia rheumatica (>40) Giant Cell Arteritis (>90)
CRP
C-reactive protein
Acute phase protein made by liver.
DIrect measure of reactants
RF
Rheumatoid Factor
80% sensitivity in RA pts
RF has lots of false?
Positives
Patient must have high pre-test probability for best diagnostic value
Anti-CCP
Citrulline Antibody
Associated w/ RA
Greater specificity
ANA
Anti-nuclear antibodies
Indicate systemic autoimmune dz
Sensitive for SLE, but also many other diseases
Anti-dsDNA
Specific for SLE
60-70%
Anti-Sm
Highly specific for SLE
ACA
Anti-centromere antibody
Associated w/ CREST and scleroderma
Anti-topoisomerase
Associated w/ diffuse scleroderma
Anti-Ro and La
Associated w/ sjogrens
Anti-U1 snRNP
Nonspecific
Part of criteria for mixed connective tissue dz
Anti-Jo-1
Specific for myositis with interstitial lung dz.
Raynauds
Low C3 and C4
Seen in active SLE