Inducing gene expression of cardiac antioxidant enzymes by dietary phenolic acids in rats

Chi Tai Yeh, Li Chien Ching, Gow Chin Yen

Research output: Contribution to journalArticlepeer-review

91 Citations (Scopus)

Abstract

An increase in oxidative stress is suggested to be intimately involved in the pathogenesis of heart failure. Phenolic acids are widespread in plant foods; they contain important biological and pharmacological properties. This study evaluated the role of phenolic acids on the expression of antioxidant enzymes in the heart of male Sprague-Dawley rats. Gallic acid, ferulic acid and p-coumaric acid at a dosage of 100 mg kg -1 body weight significantly increased the activities of cardiac superoxide dismutase, glutathione peroxidase (GPx) and catalase (CAT) as compared with control rats (P<.05). The changes in cardiac CuZnSOD, GPx and CAT mRNA levels induced by phenolic acids were similar to those noted in the enzyme activity levels. A significant (P<.05) increase in the GSH/GSSG ratio was observed in the heart of phenolic acid-treated rats. The heart homogenates obtained from rats that were administered phenolic acids displayed significant (P<.05) increases in capacity for oxygen radical absorbance compared with control rats. Immunoblot analysis revealed the increased cardiac total level of Nrf2 in phenolic acid-treated rats. Interestingly, phenolic acid-mediated antioxidant enzyme expression was accompanied by up-regulation of heme oxygenase-1. This study demonstrates that antioxidant enzymes in rat cardiac tissue can be significantly induced by phenolic acids following oral administration.

Original languageEnglish
Pages (from-to)163-171
Number of pages9
JournalJournal of Nutritional Biochemistry
Volume20
Issue number3
DOIs
Publication statusPublished - Mar 2009
Externally publishedYes

Keywords

  • Antioxidant capacity
  • Antioxidant enzymes
  • Cardioprotection
  • Heart
  • Heme oxygenase-1

ASJC Scopus subject areas

  • Biochemistry
  • Clinical Biochemistry
  • Molecular Biology
  • Endocrinology, Diabetes and Metabolism
  • Nutrition and Dietetics

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