Flashcards - Immuno
right lymphatic drainage
right side above diaphragm
IgA
Does not fix complement - monomer/dimer - excreted by transcytosis - protects against Giardia
Hypersensitivity Type I
allergy - analphylaxis/atopic, IgE - preformed Abs, on presensitized mast cells –> histamine release
Hypersensitivity Type II
tissue target - positive Coombs test - goodpastures, pernicious anemia, anti-Rh, graves
Hypersensitivity Type III
serum sickness, SLE/post strep glomerulonephritis - antigen/complement complex
Hypersensitivity Type IV
contact dermatitis, MS, PPD, Graft v Host - sensitized T-cell to antigen –> cytokine release
Thymus independent
antigens with no peptide component, cannot be presented by MHC - weak vaccines
Thymus dependent
antigens with protein component (diphtheria) - class switching and B-cell memory
Adenoside deaminase deficiency
SCID
Arthus reaction
Type III - after injections - ab/ag complexes form necrosis
MHC I chains
heavy chain + B2 microglobulin
MHC II chains
Alpha and beta polypeptide chains
Th2
mediate class switching and Ab production by B cells, recruits eosinophils - humoral immunity
HLA-A3
Hemochromatosis
HLA-B27
Ankylosing spondylitis, Reiter’s syndrome, Ulcerative colitis
HLA-DR2
SLE, Goodpasture, MS, hay fever
HLA-DR4
Rheumatoid Arthritis, Diabetes (DR3 as well)
HLA-DR5
pernicious anemia
HLA-DQ2/8
Celiac disease
IFN-a/b
modulates viral infections
IFN-gamma
Th1 - activates macrophages
IL-1
Macs - Fever, osteoclast activation
IL-2
T-cell - stimulates growth of helper, cytotoxic, regulatory T cells, NK cells
IL-3
T-cell - GM-CSF like factor
IL-4
Th2 - mediates class-switch to IgE
IL-5
Th2 - attacts eosinophils, IgA production
IL-6
Macs - fever, induces production of acute phase reactants (hepcidin, CRP, ferritin, fibrinogen, serum amyloid A)
IL-8
Macs - chemoattractant for neutrophils
IL-10
Th2 - antiinflammatory - decreases MHC class II, Th1 cytokines
IL-12
Macs - stimulates differentiation into TH1 in naive T-helpers, NK cells stimulation
TNF-alpha
fever, hepatic release of acute-phase reactants, cachexia
TGF-beta
immunosuppresant
CD14
Macrophages - binds with TLR4 - involved in supertoxin response
CD18
LFA-1 integrin - defective in leukocyte adhesion deficiency type 1 - unable to extravasate
CD19
B-cells
CD20
B-cells - rituximab target
CD21
B-cell - EBV receptor
CD25
T-cells
CD28
T-cell - costimulation w/ B7 on dentritic cell activates T-cell –> cytokines
CD31
PECAM - neutrophil transmigration across endothelium
CD-40
B-cell - costimulation w/ CD40L on T-cell classwitches B-cell - defective in hyperIgM
CD54
ICAM - neutrophil adhesion
CD55
decay-accelerating factor (DAF) - inhibits complement activation on self cells
rituximab
Anti CD-20 - RA, B-cell lymphoma
muronamab
Anti CD-3 - expressed by activated T-lymphocytes - acute rejection
LTB4
chemoattractant neutrophils
C3a, C4a, C5a
anaphylaxis
C3b
opsonizes
C5a
neutrophil chemoattractant
C5b-9
cytolysis by MAC
NF-KB
transcription factor for cytokine production
isotype switching location
germinal center
tolerance development location
fetal thymus/peripheral
recombination location
bone marrow
negative selection location
fetal thymus medulla
Fas
expressed on T-lymphocytes - induces selfapoptosis, mutations result in autoimmune disease
FGFR3
AD - achondroplasia - impaired cartilage proliferation
Anti-ACh receptor
Myasthenia gravis
Anti-basement membrane
Goodpasture syndrome
Anticardiolipin, lupus anticoagulant
SLE, antiphospholipid syndrome
Anticentromere
Limited scleroderma (CREST syndrome)
Anti-desmosome (anti-desmoglein)
Pemphigus vulgaris
Anti-dsDNA, anti-Smith
SLE - dsDNA = renal disease, Smith = anti snRNPs
Anti-glutamic acid decarboxylase (GAD-65)
Type 1 diabetes mellitus
Antihemidesmosome
Bullous pemphigoid
Anti-histone
Drug-induced lupus - hydralazine, procainamide, isoniazid, minocycline, quinidine
Anti-Jo-1, anti-SRP, anti-Mi-2
Polymyositis, dermatomyositis
Antimicrosomal
Hashimoto thyroiditis
Antimitochondrial
1° biliary cirrhosis
Antinuclear antibodies
SLE, nonspecific
Antiparietal cell
Pernicious anemia
Anti-Scl-70 (anti-DNA topoisomerase I)
Scleroderma (diffuse)
Anti-smooth muscle
Autoimmune hepatitis
Anti-SSA, anti-SSB (anti-Ro, anti-La)
Sjögren syndrome
Anti-TSH receptor
Graves disease
Anti-U1 RNP (ribonucleoprotein)
Mixed connective tissue disease
IgA anti-endomysial, IgA anti-tissue transglutaminase
Celiac disease
MPO-ANCA/p-ANCA
Microscopic polyangiitis, eosinophilic granulomatosis with polyangiitis (Churg-Strausssyndrome)
PR3-ANCA/c-ANCA
Granulomatosis with polyangiitis (Wegener)
Rheumatoid factor (IgM antibody that targets IgG Fc region), anti-CCP (more specific)
Rheumatoid arthritis
osteomyelitis in sickle cell
Salmonella, S. aureus
Pott disease
mycobacterium tuberculosis
rheumatoid arthritis hypersensitivity
Type III and IV
low C1 esterase inhibitor
heriditary angioedema - can’t use ACE inhibitors
low C3
risk of recurrent pyogenic sinus/respiratory infections, type III reactions
C5-C9 deficiencies
recurrent Neisseria bacteremia
Bruton’s agammaglobulinemia
BTK - bruton’s tyrosine kinase deficiency - very low immunoglobulin, no mature B-cells, intact T-cell lymphocyte function, no lymph nodes/tonsils, germinal cortex absent - Giardia, enterovirus, bacteria, no vaccines
SCID
adenosine deanimase, IL-2R/cytokine defect or MHC II defect - unable to mature B and T-cells - complete absence of thymus, GCs and B/T cells
DiGeorge Syndrome
22q11 deletion - no thymus/parathymus - decreased T cells, hypocalcemia
Common variable immunodeficiency
B-cell maturation defect - decreased plasma cells and immunoglobulins - increased risk of autoimmune disease
IgA deficiency
decreased IgA, normal IgG/IgM - anaphylaxis to IgA containing blood
Hyper-IgM
CD40/CD40L defect - increased IgM due to inability to class switch - decreased IgE, IgA, IgG
Wiskott-Aldrich Syndrome
XL - WAS gene defect, unable to recognize actin cytoskeleton - WATER (Wiskott-Alrdich, thrombocytopenic purpura, eczema, recurrent infections)
Ataxia-teleangiectasia
ATM defect - DNA double strand repair - cerebellar defect, spider angiomas, IgA deficiency - increased AGP, decreased IgA, IgG, IgE, lymphopenia, cerebellar atrophy
Autosomal dominant hyper IgE
Deficiency of Th17 cells due to STAT3 mutation –> impaired neutrophil recruitment - coarse facies, cold staph abscesses, retained primary teeth, eczema, increased IgE, decreased IFN-gamma
IL-12 deficiency
AR - decreased Th1 response, IFN-gamma release - disseminated mycobacterial/fungal infections - no BCG vaccine
Chronic mucocutaneous candidiasis
T-cell dysfuction - no T-cell response to Candida antigens/infections
Chekiak-Higashi Syndrom
microtubule defect - unable to traffic phagosomes to lysosomes - pyogenic infections, albinism, neuropathy
CD3
T-cells
Leukotriene B4
neutrophil migration to site of inflammation
Th1
responsible for cell-mediated immune response against mycobacteria - activated by IL-12 from macs, and IFN-gamma from Th1
positive selection location
fetal thymus cortex
antithyroglobulin
Hashimotos