Abstract
To investigate the role of MCP-1-2518, stromal cell-derived factor-1 (SDF-1)-G801A and chemokine receptors CCR5-Delta32, CCR5-59 029, and CCR2-64I gene polymorphisms in transitional cell carcinoma of the bladder in Mexican Mestizo patients. Forty-seven unrelated consecutive patients with non-muscle-invasive transitional cell carcinoma (TCC) and 126 unrelated healthy individuals were studied. Genomic extraction was carried out from complete blood samples using the salting out method. The PCR-RFLP method was used to amplify the following polymorphisms: MCP-1-2518, SDF-1-G801A, CCR5-Delta32, CCR5-59 029, and CCR2-64I. The patients were divided according to low, intermediate, and high risk of progression and treated accordingly with surveillance or immunotherapy with BCG. SDF-1-G801A, CCR5-Delta32, CCR5-59 029, and CCR2-64I polymorphisms were not associated with the genetic susceptibility to non-muscle-invasive TCC of the bladder in Mexican patients. The distribution of AA, AG, and GG genotypes of MCP-1-2518 was significantly different in bladder cancer patients compared with controls (P = .006). There was a significant decrease both in the frequency of the G mutant allele (P = .021, OR = 1.752; C 95% CI 1.088-2.828) and in the GG genotype (P = .001, OR = 6.097 95% CI 1.885-19.570) in TCC patients, compared with controls. This preliminary study shows that MCP-1 polymorphism is associated with TCC.
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