title: Role of TP53 Arg72Pro polymorphism in urinary bladder cancer predisposition and predictive impact of proline related genotype in advanced tumors in an ethnic Kashmiri population.
abstract: Among various polymorphic variants of TP53 gene, codon 72 polymorphism (Arg72Pro) has been found to be associated with cancer susceptibility, but only few studies have investigated their effect on bladder cancer risk. A case-control study was conducted and we observed the genotype distribution of TP53 Arg72Pro SNP, to elucidate the possible role of this SNP as risk factor in urinary bladder cancer (UBC) development and to examine its correlation with the clinicopathologic variables of UBC cases. Using the polymerase chain reaction-restriction fragment length polymorphism approach, we tested the genotype distribution of 108 bladder cancer patients in comparison with 138 cancer-free controls from the same geographical region. We observed significant differences between the control and bladder cancer patients with odds ratio = 2.9 and 95% confidence interval = 1.5-4.5 (P = 0.00001). Interestingly, the proline form was abundantly observed in advanced tumors (P < 0.05). We also found a significant association of the variant allele (GC+CC) with male subjects and ever smokers (P = 0.001). Thus, it is evident from our study that Arg72Pro SNP is implicated in bladder cancer, and that the rare, proline-related allele is connected with higher susceptibility to bladder cancer.
authors.affiliation: Department of Immunology and Molecular Medicine, Sher-I-Kashmir Institute of Medical Sciences, Soura, Srinagar, Kashmir, India.
authors.forename: Arshad A
authors.initials: AA
authors.lastname: Pandith
authors.forename: Zafar A
authors.initials: ZA
authors.lastname: Shah
authors.forename: Nighat P
authors.initials: NP
authors.lastname: Khan
authors.forename: Roohi
authors.initials: R
authors.lastname: Rasool
authors.forename: Dil
authors.initials: D
authors.lastname: Afroze
authors.forename: Adfar
authors.initials: A
authors.lastname: Yousuf
authors.forename: Saleem
authors.initials: S
authors.lastname: Wani
authors.forename: Mushtaq
authors.initials: M
authors.lastname: Siddiqi
mesh_terms: D000328:Adult; D001120:Arginine / Q000235:genetics; D005260:Female; D016158:Genes, p53; D020022:Genetic Predisposition to Disease; D005838:Genotype; D006801:Humans; D007194:India; D008297:Male; D008875:Middle Aged; D016017:Odds Ratio; D011110:Polymorphism, Genetic; D020641:Polymorphism, Single Nucleotide; D011392:Proline / Q000235:genetics; D012307:Risk Factors; D012907:Smoking; D016159:Tumor Suppressor Protein p53 / Q000378:metabolism*; D001749:Urinary Bladder Neoplasms / Q000235:genetics*
chemical_list: C495901:TP53 protein, human; D016159:Tumor Suppressor Protein p53; D001120:Arginine; D011392:Proline