First Aid - Immunology rando stuff Flashcards
LND: cervical
head and neck
LND: hilar
lung
LND: mediastinal
trachea and esophagus
LND: axillary
upper limb, breast skin above umbilicus
LND: celiac
liver, stomach, spleen, pancreas, upper duodenum
LND: S. mesenteric
lower duodenum, jejunum, illeum, colon to splenic flexure
LND: I. mesenteric
colon from splenic flexure to upper rectum
LND: internal iliac
lower rectum to anal canal above pectinate line, bladder, vaginal (middle third), prostate
LND: para-aortic
testes, ovaries, kidneys, uterus
LND: superficial inguinal
anal canal (below pectinate line, skin below umbilicus (except popliteal territory)
LND: popliteal
dorsolateral foot, posterior calf
LND: right lymphatic duct
right side above diaphragm
LND: thoracic duct
everything else and goes into left subclavian and internal jugular
encapsulated bacteria
S. pneumo, H. flu B, N. men, E. coli, Salmonella, Kleb., GBS
what pharyngeal pouch does thymus come from?
3rd
where in the spleen are T cells
periarterial lymphatic sheath within white pulp
where in the spleen are B cells?
follicles in the white pulp
what is the marginal zone?
area between red and white pulp comtaining APCs and specialized B cells. APCs present blood borne antigens.
What features do you see post-splenectomy?
howell jolly bodies, target cells, thrombocytosis
function of MHC I versus MHC II
MHC I - endogenous antigens to CD8+ T cells
MHC II - exogenous proteins to T helper cells
antigen loading in MHC I versus MHC II
MHC I - RER after delivery via TAP
MHC II - release of invariant chain into acidified endosome
HLA A3
hemochromatosis
HLA B27
Psoriatic arthritis, Ankylosing spondylitis, arthritis of IBD, Readtive arthritis
HLA DQ2/DQ8
Celiac
HLA DR2
MS, hay fever, SLE, Goodpasture
HLA DR3
DM type I, SLE, Graves
HLA DR4
Rheumatoid arthritis, DM type I
HLA DR5
Pernicious anemia –> vit. B12 deficiency, Hashimoto thyroiditis
what enhances NK cell activity?
IL 2, IL 12, IFNb, IFNa
what induces NK killing
nonspecific activation signal and/or lack of MHC I
How do NK cells kill?
Ab-dependent cell mediated cytotoxicity: CD 16 binds Fc of bound Ig –> activating NK cells
Th cells release ___ to activate TH1
IL12
Th cells release ___ to activate TH2
IL4
Th cells release ___ to activate TH17
TGFb and IL6
Th cells release ___ to activate Threg
TGFb
what are the two signals in T cell activation?
- antigen on MHC II recognized by TCR on Th or MHC I to Tc
2. B7 and CD28
What are the two signals in B cell activation?
- antigen on MHC II recognized by TCR on Th
2. CD40 on B cells binding to CD40L on Th to release cytokines for class switching
what do Th1 cells secrete?
IFNg to activate macrophages and CTLs
What are Th1 cells inhibited by?
IL4 and IL10
What do Th2 cells secrete?
IL4, IL5, IL6, IL13 to recruit eosinophils for parasite defense and promotes IgE production by B cells
What are Th2 cells inhibited by
IFNg
macrophage- lymphocyte interaction
macrophage=> IL12 –> stimulates T cells –> Th1=> IFNg –> stimulates macrophages
t reg function
suppress CD4 and CD8 t cell effector function
cell surface markers on t regs
CD3, CD4, CD25, FOXP3
Activated t regs produce what?
IL10 and TGFb
upregulated acute phase reactants in inflammation
serum amyloid A, CRP, ferritin, fibrinogen, hepcidin
downregulated acute phase reactants in inflammation
albumin, transferrin
What cytokines induce acute phase reactants?
IL6, IL1, TNFa, IFNg
C1 esterase inhibitor deficiency
hereditary angioedema. ACE inhibitors are contraindicated
C3 deficiency
increased risk of severe, recurrent pyogenic sinus and respiratory tract infections: increased susceptibility to type III hypersensitivity reactions
C5-9 deficiencies
Neisseria bacteria
DAF (GPI anchored enzyme) deficiency
complement mediated lysis of RBCs and paroxysmal nocturnal hemoglobinuria
what cytokines are secreted by macrophages?
IL1, IL6, IL8, IL12, TNFa
What cytokines are secreted by all t cells?
IL2, IL3
What cytokines are secreted by Th1
IFNg
What cytokines are secreted by Th2
IL4, IL5, IL10