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.

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