Association between the p53 polymorphisms and breast cancer risk: meta-analysis based on case-control study

Area of Science:

• Genetics
• Oncology
• Molecular Biology

Background:

• The tumor suppressor gene p53 is crucial in breast cancer development.
• Previous studies on p53 polymorphisms and breast cancer risk show conflicting results.

Purpose of the Study:

• To investigate the association between p53 polymorphisms (codon 72, IVS3 16 bp, IVS6+62A>G) and breast cancer risk using meta-analysis.
• To clarify the role of these genetic variations in breast cancer etiology.

Main Methods:

• A comprehensive meta-analysis was conducted on published studies.
• Data from 27,046 cases and 30,998 controls for codon 72, 3,332 cases and 3,700 controls for IVS3 16 bp, and 8,787 cases and 9,869 controls for IVS6+62A>G were analyzed.
• Various inheritance models were employed.

Main Results:

• No significant association was found for p53 codon 72 polymorphism overall.
• Stratified analysis revealed a significant association for codon 72 homozygous mutants in the Indian population (additive and recessive models).
• The p53 IVS3 16 bp polymorphism showed a significant association with increased breast cancer risk across multiple genetic models.
• No significant association was observed for the IVS6+62A>G polymorphism.

Conclusions:

• The p53 IVS3 16 bp polymorphism is a potential genetic marker for breast cancer susceptibility.
• p53 codon 72 homozygous mutants may be associated with reduced breast cancer risk in the Indian population.
• Further research is needed to elucidate the complex role of p53 polymorphisms in breast cancer.