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Brain-Derived Neurotrophic Factor in Acute Coronary Syndromes: Beyond Diagnosis Toward Biological Phenotyping and
Michal Pruc1, Rafal Lopucki2, Katarzyna Czarnek1
1Institute of Medical Sciences, The John Paul II Catholic University of Lublin, 20-708 Lublin, Poland.
Insights
Brain-derived neurotrophic factor (BDNF) shows potential for risk stratification in acute coronary syndromes (ACS). However, current evidence does not support BDNF as a diagnostic biomarker for ruling in or out ACS.
Area of Science:
- Cardiology
- Biomarker Research
- Translational Medicine
Background:
- Acute coronary syndromes (ACS) are time-critical emergencies requiring early diagnosis and risk stratification.
- Current diagnostic tools like high-sensitivity cardiac troponin (hs-cTn) have limitations in assessing underlying pathophysiological processes.
- Brain-derived neurotrophic factor (BDNF) is being investigated as a potential biomarker in ACS.
Purpose of the Study:
- To review the biological rationale and clinical evidence for BDNF as a biomarker in ACS.
- To identify sources of heterogeneity affecting BDNF measurement and interpretation.
- To evaluate BDNF's potential role in risk stratification beyond diagnosis.
Main Methods:
- Narrative review of existing literature on BDNF in ACS.
- Analysis of pre-analytical, analytical, and phenotypic factors influencing BDNF levels.
- Examination of studies assessing BDNF's correlation with ACS subtypes and clinical outcomes.
Main Results:
- Circulating BDNF concentrations show significant variability due to matrix, sampling time, ACS subtype, and assay methods.
- Current evidence does not support BDNF as a standalone diagnostic biomarker for ACS rule-in or rule-out.
- BDNF may reflect platelet activation, endothelial dysfunction, inflammation, and post-ACS remodeling.
Conclusions:
- BDNF is not a substitute for hs-cTn in the acute diagnosis of ACS.
- BDNF holds potential for biological phenotyping and risk stratification in ACS patients.
- Standardized methods, separate proBDNF/mature BDNF assessment, serial sampling, and large multicenter validation are needed for future research.
Abstract:
Acute coronary syndromes (ACS) remain time-critical clinical emergencies in which early diagnosis and accurate risk stratification determine management and outcomes. Although symptoms, electrocardiography, and high-sensitivity cardiac troponin (hs-cTn) provide a reliable framework for detecting myocardial injury, they offer limited insight into plaque instability, thromboinflammatory activity, vascular repair, and post-infarction remodeling. In this narrative review, we examine the biological rationale and current clinical evidence supporting brain-derived neurotrophic factor (BDNF) as a candidate biomarker in ACS, with particular attention to pre-analytical, analytical, and phenotypic sources of heterogeneity. Available studies show that circulating BDNF concentrations vary substantially according to biological matrix, timing of sampling, ACS subtype, and assay methodology, which likely contributes to inconsistent findings across cohorts. Overall, current evidence does not support BDNF as a diagnostic alternative to hs-cTn in rule-in or rule-out pathways. However, BDNF may have value in biological phenotyping and risk stratification by reflecting platelet activation, endothelial dysfunction, inflammatory signaling, and remodeling processes after ACS. Further progress will require standardized pre-analytical procedures, separate assessment of mature BDNF and proBDNF, serial sampling, and validation in large multicenter studies.
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