P53 codon 72 polymorphism and colorectal cancer: a meta-analysis of epidemiological studies.

Abstract

BACKGROUND/AIMS:

Studies investigating the association between p53 codon 72 polymorphism and colorectal cancer risk report conflicting results. In order to clarify this, we carried out a meta-analysis using published data to obtain more precise estimates of risk.

METHODOLOGY:

Electronic searches of PubMed and EMBASE were conducted to select studies for this meta- analysis. The principal outcome measure was the odds ratio (OR) with 95% confidence interval (CI) for the risk of colorectal cancer associated with p53 codon 72 genotype.

RESULTS:

We identified seven epidemiological studies, which included 1964 colorectal cancer cases and 2943 controls. The combined results based on all studies showed that there was no significant difference in genotype distribution [Arg/Arg (OR=0.86, 95% CI=0.68, 1.08); Pro/Pro (OR=1.27, 95% CI=0.96, 1.68); Pro/Arg (OR=1.04, 95% CI=0.92, 1.17)] between colorectal cancer and non-cancer patients. When stratifying for race, we found that patients with colorectal cancer had a significantly higher frequency of Pro/ Pro (OR=1.79, 95% CI=1.37, 2.35) and lower frequency of Arg/Arg (OR=0.66, 95% CI=0.44, 0.98) than controls among Asians. No statistical association was found between this genotype and alcohol, tobacco, stage, histological differentiation, lymph node metastasis of colorectal cancer.

CONCLUSIONS:

Our meta-analysis suggests that the p53 codon 72 polymorphism may be associated with colorectal cancer among Asians.

• Authors: Yao Liu, Huadong Qin, Yi Zhang, Tiefeng Shi, Bing Liu, Yu Sun, Yanfei Ma
• Journal: Hepato-gastroenterology (Hepatogastroenterology) 2011 Nov-Dec Vol. 58 Issue 112 Pg. 1926-9 ISSN: 0172-6390 [Print] Greece
• PMID: 22234063 (Publication Type: Journal Article, Meta-Analysis)

Chemical References

• Codon

Topics

• Codon
• Colorectal Neoplasms (genetics, pathology)
• Genes, p53
• Genotype
• Humans
• Lymphatic Metastasis
• Polymorphism, Genetic