glycocalicin
proteinGlycocalicin is the soluble ectodomain of platelet GPIbα shed during platelet activation, reflecting vWF-mediated platelet tethering and adhesion to injured endothelium.
Pathway placement
Cascade stepPlatelet adhesion & activation
Confidencehigh
RationaleCleaved GPIbα ectodomain; released upon platelet activation.
Also acts inEndothelial activation/erosion
Druggability
Not assessed (no mapped human gene target).
Type I vs Type II discrimination
ScoresLow-confidence (proxy)
R — rupture / Type-I54
C — confounder / Type-II43
A — assay feasibility68
E — evidence strength22
T1DI (composite)8
Specificity differential (R−C)+11.8
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(2)
- Biomarkers of in vivo platelet activation in coronary artery disease: a systematic review and meta-analysis: communication from the SSC of the ISTH.Journal of thrombosis and haemostasis : JTH · 2025 · PMID 40685139 · doi
- A reliable plasma marker of platelet activation: does it exist?American journal of hematology · 2002 · PMID 12111787 · doi