HS and Autoimmune Flashcards
Acute Rheumatic Fever Target antigen
Type 2 HS
Strep cell-wall Ag
Ab cross-reacts with myocardial AG
Reiter’s Syndrome HLA allele
B27
Guillain-Barre Syndrome specific pathogenic T cells
Peripheral nerve myelin or gangliosides
SLE antigen involved
Type 3 HS
dsDNA
Sm
Mast cell Mediators that are stored and released in response to Type 1 HS
- Histamine
- Heparin
- Eosinophil Chemotactic factor A
MS HLA allele
DR2
Type 1 HS Tissue injury mechanism
Mast cells and their mediators
Graves Disease HLA allele
B8
Inflammatory Bowel Disease HLA allele
B27
Ankylosing spondylitis HLA allele
B27
Type 4 HS examples
- MS
- Hashimoto
- RA
- IDDM
- Guillain-Barre (Ascending paralysis, peripheral nerve demyelination)
- Celiac
- Crohn
Celiac HLA allele
DQ2 or DQ8
Type 3 HS immune mechanism
Immune Complex Mediated
Immune complexes of circulating Ags and IgM or IgG Abs
Psoriasis HLA allele
B27
IDDM HLA allele
DR3/DR4
Type 4 HS immune mechanism
- CD4 TH1 and TH17 cells and their Cytokines
- Cells of CMI that are stimulated
Type 1 HS immune mechanism
IgE
Rheumatoid Arthritis HLA allele
DR4
Mast cell Mediators that are newly synthesized from Arachidonic acid in response to Type 1 HS
- PGD2
- PGE2
- PGF2α
- Leukotrienes C4, D4, E4
- Leukotriene B4
SLE clinical manifestations
- Nephritis
- Arthritis
- Vasculitis
- Butterfly Facial Rash
Goodpasture’s HLA allele
DR2
PSGN clinical manifestations
Nephritis
Lumpy-Bumpy deposits
PSGN antigen involved
Type 3 HS
Strep cell wall Ags
Type 2 HS immune mechanism
Antibody-mediated
IgM and IgG Abs against cell or tissue Ags
SLE HLA allele
DR2/DR3
Effector cells of Type 1 HS
Mast cells
Basophils
Eosinophils
Automimmune hemolytic anemia mechanism of pathogenesis
- Opsonization
- Phagocytosis
- Complement-mediated destruction of RBC
Graves disease Target antigen
Type 2 HS
TSH receptor
Autoimmune Helolytic Anemia Target Antigen
Type 2 HS
RBC membrane protein
Prostaglandin effects
Increased smooth muscle contraction and vascular permeability
Myasthenia gravis target antigen
Type 2 HS
Ach receptor
Histamine effect
- Smooth muscle contraction (Bronchoconstriction, Intestinal hypermotility)
- Increased Vascular permeability
Goodpasture Syndrome Target antigen
Type 2 HS
Type 4 collagen in BM of kidney glomeruli and lung alveoli