Resumo

RODRIGUEZ-REY, Alexis; NORIS-GARCIA, Elena  e  FUNDORA TORRES, María Teresa. Principles and relevance of the comet assay. Rev Cubana Invest Bioméd [online]. 2016, vol.35, n.2, pp. 184-194. ISSN 1561-3011.

For several decades now the comet assay (single cell gel electrophoresis assay) has been the method used for the study of deoxyribonucleic acid damage, with multiple applications in genotoxicity assays, biomonitoring studies in humans, molecular epidemiology and ecotoxicology, and a fundamental tool for research into deoxyribonucleic acid damage and repair. The comet assay has stood out for its simplicity, sensitivity, versatility, rapidity and economy. It is a powerful technique based on microscopic visualization of deoxyribonucleic acid images after the cells have been embedded in agarose, lysed and subjected to alkaline electrophoresis. This basic methodology has been broadened, and may now detect with great sensitivity a large variety of deoxyribonucleic acid damage in any type of cell. Inclusion in the assay of enzymes capable of producing specific lesions on the deoxyribonucleic strand has broadened its detection range and sensitivity. However, it is important to bear in mind that its specificity is not absolute. The purpose of the present study is to point out some useful aspects and advantages of the method, and describe the experience with some technical aspects of the procedure, standardized in keeping with the conditions in the laboratory at the institute to extend its use in the country.

Palavras-chave : ensayo cometa; ácido desoxirribonucleico; agarosa; electroforesis alcalina; comet assay; deoxyribonucleic acid; agarose; alkaline electrophoresis.

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