Repair genes expression profile of MLH1, MSH2 and ATM in the normal oral mucosa of chronic smokers

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Arquivos
art_ALVES_Repair_genes_expression_profile_of_MLH1_MSH2_and_2017.PDF (1.2 MB)
Citações na Scopus
6
Tipo de produção
article
Data de publicação
2017
DOI
Scopus
Web of Science
PubMed
Título da Revista
ISSN da Revista
Título do Volume
Editora
PERGAMON-ELSEVIER SCIENCE LTD
Autores
ALVES, Monica Ghislaine Oliveira
CARTA, Celina Faig Lima
BARROSA, Patricia Pimentel de
NUNES, Fabio Daumas
ALMEIDA, Janete Dias
Citação
ARCHIVES OF ORAL BIOLOGY, v.73, p.60-65, 2017
Projetos de Pesquisa
Unidades Organizacionais
Fascículo
Resumo
Objective: The aim of this study was to evaluate the effect of chronic smoking on the expression profile of the repair genes MLH1, MSH2 and ATM in the normal oral mucosa of chronic smokers and never smokers. Materials and methods: The sample consisted of thirty exfoliative cytology smears per group obtained from Smokers and Never Smokers. Total RNA was extracted and expression of the MLH1, MSH2 and ATM genes were evaluated by quantitative real-time and immunocytochemistry. The gene and protein expression data were correlated to the clinical data. Gene expression was analyzed statistically using the Student t-test and Pearson's correlation coefficient, with p < 0.05. Results: MLH1, MSH2 and ATM genes were downregulated in the smoking group compared to the control with significant values for MLH1 (p = 0.006), MSH2 (p = 0.0001) and ATM (p = 0.0001). Immunocytochemical staining for anti-MLH1, anti-MSH2 and anti-ATM was negative in Never Smokers; in Smokers it was rarely positive. No significant correlation was observed among the expression of MLH1, MSH2, ATM and age, number of cigarettes consumed per day, time of smoking during life, smoking history or levels of CO in expired air. Conclusion: The expression of genes and proteins related to DNA repair mechanism MLH1, MSH2 and ATM in the normal oral mucosa of chronic smokers was reduced.
Palavras-chave
Carcinoma, Squamous cell, Smoking, Gene expression immunocytochemistry
URI
https://observatorio.fm.usp.br/handle/OPI/19075
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Coleções
Artigos e Materiais de Revistas Científicas - HC/InCor
Artigos e Materiais de Revistas Científicas - ODS/03