Electrochemical studies of (-)-epigallocatechin gallate and its interaction with DNA

Xiaofeng Zheng, Anyue Chen, Tomonori Hoshi, Junichi Anzai, Genxi Li

Research output: Contribution to journalArticlepeer-review

20 Citations (Scopus)


In this paper, an electrochemical investigation of (-)-epigallocatechin gallate (EGCG) and its interaction with DNA is presented. Via an electrochemical approach assisted by ultraviolet-visible (UV-Vis) spectroscopy, we propose that EGCG can intercalate into DNA strands forming a nonelectroactive complex, which results in the decrease of the anodic peak current of EGCG. Meanwhile, an electrochemical study with the DNA-Cu(II)-EGCG system shows that damage to DNA can be recognized electrochemically via the increase in the anodic peak current resulting from the oxidation of guanine and adenine bases. The damage can also be recognized spectrophotometrically via an increase in the 260 nm absorption band. In addition, it was found that EGCG is able to discriminate dsDNA from ssDNA, making a potential electrochemical indicator for the detection of DNA hybridization events. A rapid and convenient method of detecting EGCG was also developed in this work.

Original languageEnglish
Pages (from-to)1913-1919
Number of pages7
JournalAnalytical and Bioanalytical Chemistry
Issue number6
Publication statusPublished - 2006 Nov


  • (-)-Epigallocatechin gallate
  • DNA
  • Interaction

ASJC Scopus subject areas

  • Analytical Chemistry
  • Biochemistry


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