Screening of antioxidants from medicinal plants for cardioprotective effect against doxorubicin toxicity

Suvara K. Wattanapitayakul, Linda Chularojmontri, Angkana Herunsalee, Suphan Charuchongkolwongse, Somchit Niumsakul, John A. Bauer

Research output: Contribution to journalArticlepeer-review

100 Scopus citations

Abstract

Doxorubicin is an important and effective anticancer drug widely used for the treatment of various types of cancer but its clinical use is limited by dose-dependent cardiotoxicity. Elevated tissue levels of cellular superoxide anion/ oxidative stress are a mechanism by which doxorubicin-induced cardiotoxicity. Selected medicinal plant extracts were tested for their antioxidant capacity and cardioprotective effect against doxorubicin-induced cardiotoxicity. The cardiac myoblasts H9c2 were incubated with the antioxidants ascorbic acid, trolox, N-acetylcysteine or selected medicinal plant extracts including; 1) ethanolic extracts from Curcuma longa L-EtOH Phyllanthus emblica L-EtOH, and Piper rostratum Roxb-EtOH; and 2) water extracts from Curcuma longa L-H2O and Morus alba L-H2O. The cardioprotective effects of these extracts were evaluated by crystal violet cytotoxicity assay. IC50s of doxorubicin were compared in the presence or absence of ascorbic acids, trolox, N-acetylcysteine or plant extracts. Morus alba L-H2O showed the highest antioxidant properties evaluated by ferric reducing/antioxidant power assay. Ascorbic acid and N-acetylcysteine had modest effects on the protection of doxorubicin-induced cytotoxicity while trolox showed insignificant protective effect. All plant extracts protected cardiac toxicity at different degrees except that Curcuma longa L-EtOH had no protective effect. Phyllanthus emblica-EtOH (100 μg/ml) showed the highest cardioprotective effect (∼12-fold doxorubicin IC50 increase). The data demonstrate that antioxidants from natural sources may be useful in the protection of cardiotoxicity in patients who receive doxorubicin.

Original languageEnglish
Pages (from-to)80-87
Number of pages8
JournalBasic and Clinical Pharmacology and Toxicology
Volume96
Issue number1
DOIs
StatePublished - Jan 2005

ASJC Scopus subject areas

  • Toxicology
  • Pharmacology

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