TITLE

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

AUTHOR(S)
Xiaofeng Zheng; Anyue Chen; Tomonori Hoshi; Jun-ichi Anzai; Genxi Li
PUB. DATE
December 2006
SOURCE
Analytical & Bioanalytical Chemistry;Dec2006, Vol. 386 Issue 6, p1913
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
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. [Figure not available: see fulltext.]
ACCESSION #
23150742

 

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