Assessment of genetic damage in inflammatory, precancerous, and cancerous pathologies of the esophagus using the comet assay

Genetic Testing and Molecular Biomarkers
Mohan VasaviQurratulain Hasan

Abstract

The last few decades of cancer research indicate that DNA damage is a prerequisite for development of malignancies. An increase in damage points to reduced repair capacity and risk for progression. We have used the comet assay to assess DNA damage in individuals with various disorders of the upper gastrointestinal (GI) tract in a cohort of patients from South India. After thorough clinical, endoscopic, and histopathological evaluation, patients were categorized into cancers, precancers, inflammatory pathologies, and controls. Results from the comet assay performed on esophageal tissue cells and blood from the same patients showed good correlation of damage in the paired samples; subsequent assays were performed in blood. There was more DNA damage in cancers when compared with controls. A significant increase in damage in cancers (37%) and precancers (30.7%) when compared with the inflammatory pathologies (15.6%) and controls (10.03%) was noted. The interindividual variation observed was independent of confounding factors such as tobacco and alcohol. We suggest that the damage seen in the esophageal tissue is likely to be disease-related, whereas that seen in blood may be a reflection of disease. Individuals with greater damage ...Continue Reading

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Citations

Nov 5, 2013·Mutation Research. Reviews in Mutation Research·Andrew CollinsUNKNOWN ComNet project
Oct 26, 2016·Mutation Research. Genetic Toxicology and Environmental Mutagenesis·Marko GerićVera Garaj-Vrhovac
Sep 15, 2011·Asia-Pacific Journal of Public Health·Mayur S JoshiSunil Kumar

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Methods Mentioned

BETA
biopsy
electrophoresis

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