Age-related function of tumor suppressor gene TP53:contribution to cancer risk and progression.

Aim: To examine the influence of combined genotypes of TP53 (exon 4, intron 3, intron 6) and XRCC1 (codon 10) on lung cancer age of onset.

Methods: TP53 polymorphisms in codon 72 of exon 4 (Arg72Pro), in intron 3 (16 bp duplication), in intron 6 (G/A transition) and XRCC1 polymorphism in codon 10 (Arg399Gln) were analyzed in blood cells of 177 lung cancer patients and 196 healthy donors with Restriction Fragment Lenth Polymorphism PCR.

Results: We showed that combination of TP53 variant genotypes and XRCC1 variant genotype is associated with the increased lung cancer risk in younger, but not elderly, smokers.