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Serum Amyloid A
Pathway / Plaque inflammation

Serum Amyloid A

SAA1protein

SAA is a major acute-phase protein elevated at plaque rupture, modifies HDL-mediated reverse cholesterol transport and amplifies vascular inflammation.

Pathway placement
Cascade stepPlaque inflammation
Confidencehigh
RationaleLocal inflammatory mediator at rupture; modifies HDL; systemic inflammation.
Also acts inCoagulation / thrombus, Myocardial injury, Systemic / off-pathway
Druggability
DruggableYes
Known drugs / candidates0
Small-molecule tractableNo
Antibody tractableYes
EnsemblENSG00000173432

Type I vs Type II discrimination

ScoresLow-confidence (proxy)
R — rupture / Type-I
66
C — confounder / Type-II
88
A — assay feasibility
68
E — evidence strength
33
T1DI (composite)
9
Specificity differential (R−C)-22.5
Confounder panel (Type-II drivers)
No confounder evidence retrieved.
Tier: light (literature co-occurrence proxy — lower confidence). See the discrimination table for all markers.

Assay & specimen

Class-level default (no specific cleared assay)— generic method inferred from analyte class; confirm against a specific product insert before use.
Specimen
Serum or plasma
Collection tube
Serum separator (gold/red-top, SST) · K2/K3-EDTA (lavender-top)
Method / principle
Sandwich immunoassay (ELISA) — research-grade unless a cleared assay exists
Reagent / substrate
Matched anti-target antibody pair (capture + labeled detection)
Platform
ELISA microplate or multiplex (Luminex/MSD)
Turnaround · availability
Send-out / research · Research-grade (no universal clinical assay)

Literature evidence(11)