p53 is the most frequently mutated gene in all forms of human cancer. It responds to diverse stresses including UVR-induced DNA damage and regulates many downstream genes to initiate cell-cycle arrest, DNA repair or apoptosis. p53 gene variants at
codon 11, Pro47Ser and
codon 248 (
exon 7) were evaluated for bladder cancer (BC) risk in North Indians. In the present study, the above encoding regions in p53 genes were analyzed in a hospital based study in 200 BC and 200 healthy controls age and gender matched and of similar ethnicity. The genotyping was assessed by the polymerase chain reaction restriction fragment length polymorphism technique and statistically evaluated using SPSS software ver. 15.0. A significant association was found with
p53 codon 248 polymorphism and BC risk whereas
p53 codon 11 and
p53 Pro47Ser polymorphism showed no association with BC risk. The individuals carrying the heterozygous genotype (Arg/Trp-Arg/Gln) in the
p53 codon 248 polymorphism showed high BC risk (
p < 0.001). Combinations with heterozygous and variant genotypes also showed a high risk for BC (
p < 0.001). The minor allele (Trp/Gln) carriers of the
p53 codon 248 demonstrated a 1.7-fold risk for BC. Furthermore, haplotype analysis revealed that the Glu-Pro-Trp/Gln haplotype is associated with a 1.9-fold risk for BC. A protective role was observed with tumor stage/grade of BC patients with
p53 codon 248 (
p = 0.003; OR = 0.32). Thus, it is evident from our study that of all the 3 single nucleotide polymorphisms evaluated, only
p53 codon 248 (
exon7) gene polymorphism has an implication for risk in BC in the North Indian population.
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