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Histamine
Pathway / Platelet adhesion & activation

Histamine

metabolite

Histamine dampens platelet activation and thromboinflammation, protecting against coronary microthrombosis in acute MI.

Pathway placement
Cascade stepPlatelet adhesion & activation
Confidencemedium
RationaleMast-cell/basophil mediator; antiplatelet and endothelial-protective effects post-MI.
Also acts inEndothelial activation/erosion
Druggability
Not assessed (no mapped human gene target).

Type I vs non-Type I discrimination

ScoresShared / rises in both
R — rupture / Type-I
67
C — non-Type-I
70
A — assay feasibility
42
E — evidence strength
38
T1DI (composite)
8
Specificity differential (R−C)-3.3
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.
2sepsis / systemic inflammationn/a
2anemia / acute blood lossmag 2
2hypovolemia / dehydrationmag 2
2tachyarrhythmiamag 2
2hypoxemia / respiratory failuremag 2
2hypertensive emergencymag 2
2high-demand / peri-operative stressn/a
3sudden cardiac deathmag 2
4aPCI-related periproceduralmag 2
4bstent thrombosismag 2
4cin-stent restenosismag 3
5CABG-relatedmag 2
Coverage: 10/12 axes with evidence
Tier: deep-scored (abstract-extracted) · 19 supporting references. 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, plasma or urine
Collection tube
Serum separator (gold/red-top, SST) · Lithium heparin (green-top) · Sterile urine container
Method / principle
LC-MS/MS (targeted metabolomics) or enzymatic colorimetric where available
Reagent / substrate
Stable-isotope-labeled internal standard (MS); or enzyme-coupled Trinder reagent
Platform
LC-MS/MS; some automated chemistry
Turnaround · availability
Send-out / research · Specialized / research

Literature evidence(1)