Adaptive Immunology Flashcards
IgM
- Produced first
- sign of acute infection
- activate classical complement
- primary BCR
IgD
- BCR
- secreted in upper respiratory mucosa
IgG
- most abundant
- opsonization
- ADCC
- cross placenta
- activates classical complement
- 4 subtypes
IgA
- mucosal immunity
- mono or dimeric
- 2 subtypes
- mother’s milk
IgE
- allergy
- helminth defense
Th1 cells secrete
IFN-gamma
Th2 cells secrete
IL-4, IL-5, IL-13
Th17 cells secrete
IL-17 and IL-22
Th1 general function
Macrophage-mediated killing of intracellular pathogens
Th2 general function
Antibody-mediated immunity to extracellular parasites, asthma/allergy
Th17 general function
Immune response to extracellular fungi/bacteria; autoimmunity
Antigen processing of MHCII is of…
Extracellular microbes/antigen
Antigen processing of MHCI is of…
Intracellular microbe
MHCII
- ) phagolysosome digestion
- ) ER, alpha and beta chains associate with Ii
- ) Exocytosis
- ) MHCII-Ii to lysosome»digested»CLIP»HLA-DM»high affinity foreign peptide
- ) Loaded MHCII to surface»recognized by naive CD4
MHCI
- ) intracellular microbes produce protein in cytosol of cell
- ) ubiquitin»proteasome»peptide
- ) to ER via TAP
- ) MHCI with TAP via tapasin
- ) peptide cleaved by ERAP then bound to MHCI
- ) MHCI dissociates and exits via exocytosis to surface»recognized by CD8
MHCI genes
HLA-A
HLA-B
HLA-C
MHCII genes
HLA-DP - alpha and beta
HLA-DQ - one of two alphas and beta
HLA-DR - alpha, beta 1 and 0 or 1 of (3,4,5)
Lymphoid tissue homing receptors
CCR7 on cells
CCL19/21 ligands in lymph
DCs receptors
ICAM-1, B7, cytokines for T cell proliferation (IL-2)
Multipotent progenitor cells receptors to home to thymus
CCR9/CCL25
pro-T cell marker
CD2+
Bone marrow stromal cells secrete…
SCF, Kit, IL-7
surrogate light chain proteins
VpreB, lambda-5
B cells home to primary follicle using chemokines…
CXCL13, CXCR5
Costimulatory molecules for T-cell activation
CD28:B7
APC secretes these cytokines for Th1 differentiation
IFN-gamma, IL-12
APCs secrete this cytokine for Th2 differentation
IL-4
APCs secrete these cytokines for Th17 differentiation
IL-1, IL-6, TGF-beta
IL-17 induces tissue cells to secrete…
TNF, IL-1, IL-6
Stem cell marker
CD34
B cell markers
CD10, CD19
T cell markers
CD2, CD3, CD4, CD8