Systemic Response to Injury Flashcards
Cellular injury is clinically manifested as
Fever, tachycardia, tachypnea and leukocytosis
Products of cellular damage
Alarmins
DAMPs
PAMPs + TLRs
Best characterized DAMP in the context of the injury-associated inflammatory response
HMGB1
Key players in DAMP/TLR interaction
Proteoglycans, glycosaminoglycans, glycoproteins
A proteoglycan that is identified as TLR ligand
Biglycan
First human TLR
TLR4
Large family of proteins composed of intracellular PRRs that sense both endogenous and exogenous molecules
NLRs
Soluble pattern recognition molecules that share a conserved mode of action that is defined by complement activation, agglutination and neutralization, and opsonization
Pentraxins
PRM synthesized in the liver in response to IL-6
C-reactive protein
Marker of pro-inflammatory response in patients with appendicitis, vasculitis and ulcerative colitis
C-reactive protein
A long pentraxin that increases rapidly in sepsis
PTX3
Activation of TLRs in the absence of bacterial pathogensl
Sterile inflammation
Activation of inflammasome result in cleavage of pro-caspase 1 into two products that assemble to form the?
IL-1 converting enzyme (ICE)
Clinical manifestation of SIRS
2 or more:
Temp >= 38oC
HR >= 90bpm
RR >= 20 breaths/min or PaCO2 <= 32mmHg or mechanical ventilation
WBC >= 12,000/ul or <= 4,000/ul or >= 10% band forms
Clinical manifestation of sepsis
Infection + SIRS