Inosine
metaboliteNucleoside byproduct of ATP degradation during myocardial ischemia, signaling rapid cardiomyocyte energy stress.
Pathway placement
Cascade stepMyocardial injury (shared endpoint)
Confidencehigh
RationaleEarly acute cardiac ischemia marker; metabolic adaptation during hypoxia.
Druggability
Not assessed (no mapped human gene target).
Type I vs Type II discrimination
ScoresLow-confidence (proxy)
R — rupture / Type-I43
C — confounder / Type-II92
A — assay feasibility42
E — evidence strength34
T1DI (composite)4
Specificity differential (R−C)-49.3
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, 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(3)
- Unbiased metabolomics screening for potential biomarkers in patients with In-stent restenosis post percutaneous coronary intervention.Scandinavian cardiovascular journal : SCJ · 2026 · PMID 41504866 · doi
- Metabolomic analysis of serum and myocardium in compensated heart failure after myocardial infarction.Life sciences · 2019 · PMID 30731143 · doi
- Inosine and hypoxanthine as novel biomarkers for cardiac ischemia: from bench to point-of-care.Experimental biology and medicine (Maywood, N.J.) · 2015 · PMID 25956679 · doi