p53 Exon 4 (codon 72) Polymorphism and Exon 7 (codon 249) Mutation in Breast Cancer Patients in Southern Region(Madurai) of Tamil Nadu

  • Vijayaraman, Kiruthiga Perumal (Department of Biotechnology, Alagappa University) ;
  • Veluchamy, Mohanasundari (Department of Biotechnology, Alagappa University) ;
  • Murugesan, Pravina (Department of Biotechnology, Alagappa University) ;
  • Shanmugiah, Karutha Pandian (Department of Biotechnology, Alagappa University) ;
  • Kasi, Pandima Devi (Department of Biotechnology, Alagappa University)
  • Published : 2012.02.29


Background: We investigated the association between polymorphisms in the $p53$ tumor suppressor gene and breast cancer risk in women especially in the Southern part of India. Methods: Genotyping was performed for 50 breast cancer women and 50 controls to determine the status of $p53$ exon 4 codon 72 polymorphism and exon 7 codon 249 mutation and their possible role in breast cancer risk. Results: Frequency of Arg/Arg at codon 72 was 18% in controls and 28% in patients, Arg/Pro frequency was 56% and 66%, Pro/Pro genotype was 8% in controls and 8% in patients. No significance was observed for breast cancer risk with either Arg/Arg or Pro/Pro genotype in codon 72 polymorphism. Similarly, mutation analysis of exon 7 codon 249 revealed that 72% of breast cancer patients have mutation, which is not statistically significant. However, there is a strong association between increase in exon 7 codon 249 mutation and exposure to pollution. Conclusion: The results suggested that there is no risk for exon 4 with Arg/Arg or Pro/Pro polymorphisms in the $p53$ gene and there is no strong correlation between breast cancer patients and mutation in exon 7 codon 249 in South Indian women.


Breast cancer;p53;exon 4 codon 72;exon 7 codon 249;South India


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