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Gaceta médica de México
On-line version ISSN 2696-1288Print version ISSN 0016-3813
Abstract
GONZALEZ-VILLASENOR, Christian O. et al. A novel mutation in the TSC2 gene protects against colorectal cancer in the Mexican population. Gac. Méd. Méx [online]. 2022, vol.158, n.5, pp.293-298. Epub Nov 18, 2022. ISSN 2696-1288. https://doi.org/10.24875/gmm.22000037.
Introduction:
Colorectal cancer (CRC) is a complex disease due to the large number of factors that influence its development, including variants in tumor suppressor genes.
Objective:
To estimate allelic and genotypic frequencies of c.3915G>A and c.5371G>A variants of the TSC2 gene in a Mexican population with CRC, as well as to analyze their association with the development of CRC.
Methods:
126 peripheral blood samples from patients diagnosed with sporadic CRC and 134 from healthy individuals, regarded as the control group, were included. Identification of genotypes was carried out using traditional PCR and enzymatic digestion. All individuals signed an informed consent letter.
Results:
The A allele of the c.3915G>A variant (OR = 0.31, 95% CI = 0.15-0.69, p = 0.004), as well as A/G haplotype of the c.3915G>A and c.5371G>A variants (OR = 0.28, 95% CI = 0.12-0.68, p = 0.005) showed a possible protective effect against sporadic CRC. In silico analysis indicated that both variants generate modifications in the splicing process.
Conclusion:
The presence of TSC2 gene c.3915G>A variant suggests a possible protective effect against sporadic CRC in the Mexican population; however, no association was observed with the c.5371G>A variant.
Keywords : Colorectal cancer; Tuberous sclerosis complex 2; TSC2 gene; Tumor suppressor genes.