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[Anthracycline-induced cardiotoxicity].

Thierry Petit1

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Anthracyclines combat cancer but cause heart damage, especially chronic toxicity from cumulative doses and free radicals. Strategies like modified dosing, cardioprotection, and newer drug analogues can mitigate this cardiotoxicity.

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Area of Science:

  • Oncology
  • Cardiology
  • Pharmacology

Context:

  • Anthracyclines are vital chemotherapy agents targeting topoisomerase II for various cancers.
  • Their clinical utility is significantly hampered by dose-dependent cardiotoxicity, affecting acute, sub-acute, and chronic phases.
  • Chronic cardiotoxicity is linked to peak plasma concentrations, cumulative dosage, and free radical generation, impacting myocardial tissue.

Purpose:

  • To elucidate the mechanisms and clinical manifestations of anthracycline-induced cardiotoxicity.
  • To identify risk factors and diagnostic methods for anthracycline cardiotoxicity.
  • To explore strategies for reducing or preventing anthracycline-related myocardial damage.

Summary:

  • Cardiotoxicity presents acutely, sub-acutely, or chronically, with the latter associated with peak plasma levels and cumulative dose.
  • Free radical generation is a primary mechanism in late-onset cardiotoxicity, with pediatric and elderly patients being particularly vulnerable.
  • Echocardiography reveals reduced left ventricular ejection fraction, while endomyocardial biopsy offers specific early diagnosis.

Impact:

  • Early diagnosis via endomyocardial biopsy is crucial for managing anthracycline cardiotoxicity.
  • Strategies include modifying anthracycline administration, employing pharmacological cardioprotection, and utilizing less cardiotoxic analogues like epirubicin or liposomal formulations.
  • These approaches aim to preserve cardiac function during cancer treatment, improving patient outcomes and quality of life.