Thus, our current meta-analysis indicates no evidence for the association between the p53 Arg72Pro polymorphism and CRC risk in the Asian population, but significant association in Chinese population, especially for rectal cancer and in men.
In conclusion, heterozygosity and mutant homozygosity as well as the combination of both TP53 Arg72Pro and CDH1 rs16260 polymorphisms are responsible to increase the risk of colorectal cancer development in Bangladeshi population.
The gene-gene interaction between TP53 Arg72Pro and MDM2 T309G may interact in carcinogenesis of CRC in Chinese, especially in smokers, and this kind of interaction is associated with onset age of CRC.
The p53 R72P genotype was identified by polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) method in 78 consecutive colorectal cancer patients with liver metastases and 214 age- and sex-matched cases with nonmetastatic colorectal cancer.
We have previously reported that the common, functionally different variants Arg72Pro in p53 and Arg462Gln in RNASEL are associated with the age of disease onset of colorectal cancer in Lynch syndrome patients.
Few reports have investigated the association of two p53 polymorphisms (Arg72Pro and PIN3-A2) with colorectal cancer (CRC) risk, and no previous study has analyzed their role as susceptibility alleles for colorectal adenoma.
Age of diagnosis of CRC in HNPCC patients is therefore more complex than that predicted by the R72P TP53 polymorphism alone, suggesting an inter-relationship with other genetic and/or environmental factors.