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Indole and its alkyl‐substituted derivatives protect erythrocyte and DNA against radical‐induced oxidation
Author(s) -
Zhao Feng,
Liu ZaiQun
Publication year - 2009
Publication title -
journal of biochemical and molecular toxicology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.526
H-Index - 58
eISSN - 1099-0461
pISSN - 1095-6670
DOI - 10.1002/jbt.20289
Subject(s) - indole test , chemistry , antioxidant , alkyl , hemolysis , hydrochloride , medicinal chemistry , radical , stereochemistry , organic chemistry , biology , immunology
Abstract The antioxidant properties of 1,2,3,4‐tetra‐hydrocarbazole, 6‐methoxy‐1,2,3,4‐tetrahydrocar‐bazole (MTC), 2,3‐dimethylindole, 5‐methoxy‐2,3‐dimethylindole, and indole were investigated in the case of hemolysis of human erythrocytes and oxidative damage of DNA induced by 2,2′‐azobis(2‐amidinopropane hydrochloride) (AAPH), respectively. The aim of this work was to explore the influence of methoxy, methyl, and cyclohexyl substituents on the antioxidant activities of indole derivatives. These indole derivatives were able to protect erythrocytes and DNA in a concentration‐dependent manner. The alkyl‐substituted indole can protect erythrocytes and DNA against AAPH‐induced oxidation. Especially, the structural features of cyclohexyl and methoxy substituents made MTC the best antioxidant among the indole derivatives used herein. Finally, the interaction between these indole derivatives and 2,2′‐azinobis(3‐ethylbenzothiazoline‐6‐sulfonate) radical cation and 2,2′‐diphenyl‐1‐picrylhydrazyl, respectively, provided direct evidence for these indole derivatives to scavenge radicals and emphasized the importance of electron‐donating groups for the free radical–scavenging activity of indole derivatives. © 2009 Wiley Periodicals, Inc. J Biochem Mol Toxicol 23:273–279, 2009; Published online in Wiley InterScience ( www.interscience.wiley.com ). DOI 10.1002/jbt.20289