Interaction of stannous chloride leads to alteration in DNA, triphosphate nucleotides and isolated bases |
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| Authors: | José C. P. de Mattos Claudia Lage Flávio J. S. Dantas Milton O. Moraes Ana P. M. Nunes Roberto J. A. C. Bezerra Mauro V. Castro Faria Alvaro C. Leitão Adriano Caldeira-de-Araujo |
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| Affiliation: | (1) Departamento de Biofísica e Biometria, IBRAG, UERJ, Avenue 28 de Setembro, 87, Rio de Janeiro, RJ, 20551-030, Brazil;(2) Laboratório de Radiobiologia Molecular, IBCCF, CCS, UFRJ, Rio de Janeiro, RJ, 21949-900, Brazil;(3) Departamento de Biofísica e Biometria, Universidade do Estado do Rio de Janeiro, Instituto de Biologia Roberto Alcantara Gomes, Avenue 28 de Setembro, 87, Rio de Janeiro, RJ, Brazil, 20551-030 |
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| Abstract: | ![]()
Stannous chloride (SnCl2) is a reducing chemical agent used in several man-made products. SnCl2 can generate reactive oxygen species (ROS); therefore, studies have been carried out in order to better understand its damaging action in biological systems. In this work, calf thymus DNA, triphosphate nucleotides and isolated bases were incubated with SnCl2 and the results were analyzed through UV spectrophotometry. The presence of stannous ions altered the absorption spectra of all three isolates. The amount of stannous ions associated to DNA was measured by atomic absorption spectrophotometry. Data showed that more than 40% of the initial SnCl2 concentration was present in the samples. Our results are in accordance with the damaging potential of this salt and present evidence that stannous ions can complex with DNA, inducing ROS in its vicinity, which may be responsible for the observed lesions. (Mol Cell Biochem xxx: 173–179, 2005) |
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| Keywords: | stannous chloride reactive oxygen species DNA damage calf thymus DNA |
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