DNA biomarkers antecede semiquantitative anthracycline cardiomyopathy

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A Doxorubicin-induced Cardiomyopathy Model in Adult Zebrafish
08:09

A Doxorubicin-induced Cardiomyopathy Model in Adult Zebrafish

Published on: June 7, 2018

Sae Hahm1, Harley S Dresner, David Podwall

  • 1Unified Tumor Marker Laboratory, Department of Pathology and Radiation Oncology, Montefiore Medical Center, 111 East 210th Street, Central 312, Bronx, NY 10467, USA.

Cancer Investigation
|March 20, 2003
PubMed

Insights

Adriamycin (doxorubicin hydrochloride) DNA adducts in rat heart and lung tissues were quantified. Increased Adriamycin concentration correlated with specific DNA adducts, potentially serving as early cardiotoxicity markers.

Area of Science:

  • Molecular toxicology
  • Pharmacology
  • Cardiology

Background:

  • Adriamycin (doxorubicin hydrochloride) is a potent antineoplastic drug.
  • Its clinical utility is limited by dose-dependent cardiotoxicity.
  • Understanding Adriamycin-induced DNA damage is crucial for mitigating toxicity.

Purpose of the Study:

  • To measure Adriamycin DNA adduct formation in vivo.
  • To investigate the relationship between Adriamycin concentration and adduct profiles.
  • To explore the potential of adducts as early biomarkers of cardiotoxicity.

Main Methods:

  • Male Sprague-Dawley rats received intraperitoneal injections of Adriamycin (4 or 6 mg/kg) or saline control.
  • Myocardial and pulmonary tissues were analyzed 48 hours post-injection.
  • DNA was radiolabeled, enzymatically digested, and adducts were separated by 2D-TLC, quantified via autoradiography and densitometry.

Main Results:

  • Differences in the amount and type of Adriamycin DNA adducts were observed based on drug concentration.
  • Increased Adriamycin dosage led to greater partial depurination of dGMP and dAMP.
  • New adducts (HM-dUMP, 8-OH-dGMP, HM-dCMP, Me-dCMP) emerged with higher Adriamycin concentrations.

Conclusions:

  • Quantification of specific Adriamycin DNA adducts can serve as an early indicator of cardiotoxicity.
  • This approach may enable optimization of chemotherapy regimens to minimize adverse effects.
  • Further research can refine the use of these adducts for personalized cancer treatment.

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