Role of p53 codon 72 polymorphism in recurrent pregnancy loss

Abstract

Recurrent pregnancy loss (RPL) has been associated with low expression of apoptosis-and angiogenesis-related genes. The p53 tumour suppressor gene has been shown to induce apoptosis and angiogenesis. Recently, a low increased frequency of a p53 codon 72 polymorphism has been reported among women experiencing RPL. This study investigated the prevalence of p53 codon 72 polymorphism among women with a history of RPL, to determine whether this polymorphism may serve as a risk factor for miscarriage. Buccal swabs were obtained from 205 women with a history of two or more consecutive spontaneous abortions and 25 women with at least two live births and not more than one elective abortion. DNA was extracted from the buccal swabs and PCR amplification of p53 arginine(Arg)72 and proline(Pro)72 variants was performed. The frequency of homozygous Arg and Pro or heterozygous Arg/Pro genotypes among RPL patients and controls were not significantly different. No significant differences in allelic frequencies of p53 were observed. In addition, the allelic frequencies between controls and those previously reported were the same. It is concluded that p53 codon 72 polymorphisms do not serve as a susceptibility factor affecting the chances of miscarriage in an unselected population.