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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Avaliação de polimorfismos nos genes de reparo e detoxificação e a associação com o dano no DNA em etilistas / Evaluation of polymorphisms in the repair and detoxification genes and the association with DNA damage in alcoholics

Melo, Caroline Oliveira de Araújo 06 July 2017 (has links)
Submitted by Cássia Santos (cassia.bcufg@gmail.com) on 2017-08-08T11:37:43Z No. of bitstreams: 2 Tese - Caroline Oliveira de Araújo Melo - 2017.pdf: 3534804 bytes, checksum: e2352db895513b3e3c11c5732eff4bda (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) / Approved for entry into archive by Luciana Ferreira (lucgeral@gmail.com) on 2017-08-08T15:00:07Z (GMT) No. of bitstreams: 2 Tese - Caroline Oliveira de Araújo Melo - 2017.pdf: 3534804 bytes, checksum: e2352db895513b3e3c11c5732eff4bda (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) / Made available in DSpace on 2017-08-08T15:00:07Z (GMT). No. of bitstreams: 2 Tese - Caroline Oliveira de Araújo Melo - 2017.pdf: 3534804 bytes, checksum: e2352db895513b3e3c11c5732eff4bda (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Previous issue date: 2017-07-06 / Fundação de Amparo à Pesquisa do Estado de Goiás - FAPEG / Alcohol abuse is related to approximately 3.3 million annual deaths worldwide and is considered the first risk factor for the global burden of disease in countries of the Americas. Long-term abuse of alcohol induces numerous molecular and biochemical changes in alcohol-related tissues. It is believed that the toxic effects of alcohol are mediated by DNA damage by several mechanisms, such as by the induction of oxidative damage, DNA adducts, crosslinks and DNA strand breaks. In this sense, the aim of this study was to verify the frequency of polymorphisms in the repair and detoxification genes and the association with the DNA damage in alcoholics. The analysis of the obtained results showed a greater genotoxic damage in the alcoholics, when carrying out the Comet Assay. A point of variation was found in the GSTP1 gene and another point of variation in the XRCC1 gene. However, no statistically significant differences were observed between GSTM1 and GSTT1 genotypes and genetic damage. In this context, it can be concluded that the Comet Assay is a very effective and inexpensive method for the analysis of genotoxic damage. / O consumo abusivo do álcool está relacionado a aproximadamente 3,3 milhões de mortes anuais em todo o mundo, sendo considerado o primeiro fator de risco para a carga global de doenças em países das Américas. O abuso da ingestão de álcool em longo prazo induz inúmeras alterações moleculares e bioquímicas nos tecidos relacionadas ao álcool. Acredita-se que os efeitos tóxicos do álcool sejam mediados por danos ao DNA por vários mecanismos, como pela indução dos danos oxidativos, pelos adutos de DNA, pelos crosslinks e pelas quebras de fitas de DNA. Nesse sentido, o objetivo do presente trabalho foi de verificar a frequência de polimorfismos nos genes de reparo e detoxificação e a associação com o dano no DNA em etilistas. A análise dos resultados obtidos mostrou um maior dano genotóxico nos etilistas, ao realizar o Ensaio Cometa. Foi encontrado um ponto de variação no gene GSTP1 e um ponto de variação no gene XRCC1. No entanto, não foram observadas diferenças estatisticamente significativas entre os genótipos GSTM1 e GSTT1 e os danos genéticos. Nesse contexto, pode-se concluir que o Ensaio Cometa é um método bastante eficaz e barato para a análise de danos genotóxicos.

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