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PAR4
Pathway / Platelet adhesion & activation

PAR4

protein

PAR4 is a thrombin-activated platelet receptor whose signaling drives platelet shape change, aggregation, and secretion during coronary thrombosis.

Pathway placement
Cascade stepPlatelet adhesion & activation
Confidencehigh
RationaleThrombin-activated receptor; core platelet activation mechanism.
Also acts inCoagulation / thrombus
Druggability
Not assessed (no mapped human gene target).

Type I vs non-Type I discrimination

ScoresLow-confidence (proxy)
R — rupture / Type-I
77
C — non-Type-I
51
A — assay feasibility
68
E — evidence strength
26
T1DI (composite)
11
Specificity differential (R−C)+26
Non-Type-I axis panel
Does this marker also move in each non-Type-I setting? mag 0–3; higher means less Type-I-specific. n/a = no evidence retrieved, which is not the same as no change.
No non-Type-I axis 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(1)