Acute and Chronic Inflamation Flashcards
cells in acute inflamation
neutrophils, monocytes, eosinophils
cells in chronic inflamation
monocytes, lymphocyes, plasma cells
cardinal signs
rubor, tumor, dolor, calor, functio laesa
acute inflammation major steps
recognition of injury, change in vascular flow/permeability, leukocyte extraversion
what is involved in injury recognition
TLR on dendritic cells> TNF/IL1 and histamine (mast cells) > vasodilation/increased permeability
injury recognition, slow vs fast
TNF/IL1 vs histamine
change in vascular flow
brief constriction, arteriolar vasodilation, erythema and warmth.
why increased permeability
increased RBC concentration increases viscosity, decreases flow
transudate
hydrodynamic, leaky fluid, low cell/protien
exudate
inflammation> leaky fluid, high cell/protien levels. specific gravity greater than 1.015
leukocyte extraversion steps
margination, rolling/selectin, integrin/adhesion/transmigration
margination
leukocytes accumulate along vascular endothelium
rolling/selectin
TNF/IL1 increase selectin
adhesion/integrins
TNF/ILI increases Vcam and Icam, increase high affinity in integral on leukocyte
transmigration
leucocytes have PECAM1, piece BM and enter extravascular tissue
chemotaxis
leukocytes move towards bacteria, chemokine, complement, where neutrophils phagocytosis
resolution components (3)
mediators, systemic change, outcome
mediators
vasoactive, initiate/regulate, lots
systemic change
fever, leukocytosis, acute phase reactants, sepsis…
fever
IL1, TNF (Macrophage)
leukocytosis
Il1, TNFa (macrophages)
acute phase reactants
Il6 (made by Mphage)
outcomes for acute include
resolution, chronic, fibrosis
chronic inflamation
lots of macrophages! can be granulomatous
granulomatous inflammation
immune or non immune
purulent
accumulation of pus (dead neutrophils)
suppurate/suppurative
produce pus
abscess
collection of neutrophils (walled off pus)
fibrinous
protein rich
serous
protein poor, few cells
histamine and inflammation
mast cell, basophils, platelets, vasodilation and permeability
decreased colloid osmotic pressure
transudate
icam
intercellular adhesion molecule, ligand for inrwggrgin
collegenase
pierces the basement
pain mediators
prostaglandins, bradykinin, serotonin
anti inflammatory signals
IL10, TGFb (produced by macrophages)
IFNy
chronic inflammation - part of chronic