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Type: Artigo de periódico
Title: Chemical And Photochemical Generated Carbon-centered Radical Intermediate And Its Reaction With Desoxyribonucleic Acid.
Author: Justo, G Z
Livotto, P R
Durán, N
Abstract: The possible action of carbon-centered radicals in promoting damage to DNA is explored by generation of the 2-phenylethyl radical. The radical is generated during oxidation of phenelzine (2-phenylethyl hydrazine) by ferricyanide, as well as optically from phenylpropionic acid. Covalent binding of the 2-phenylethyl radical to DNA is suggested by studies with the plasmid pBR 322 DNA. Other sensitive techniques used to study DNA damage were the interaction with formaldehyde at 60 degrees C and the fluorescence of DNA-Tb(III) and DNA-DAPI complexes. Theoretical MNDO calculations indicated a preferential attack at position 8 of the guanine residues. This study shows that the 2-phenylethyl radical is able to induce primary effects on nucleic acid structure, leading to alkylated products, especially at purine rings.
Subject: Alkylation
Dna Damage
Electron Spin Resonance Spectroscopy
Fluorescent Dyes
Free Radicals
Intercalating Agents
Spectrometry, Fluorescence
Citation: Free Radical Biology & Medicine. v. 19, n. 4, p. 431-40, 1995-Oct.
Rights: fechado
Date Issue: 1995
Appears in Collections:Unicamp - Artigos e Outros Documentos

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