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http://dx.doi.org/10.7314/APJCP.2014.15.19.8413

Analysis of TP53 Polymorphisms in North Indian Sporadic Esophageal Cancer Patients  

Kaur, Sukhpreet (Human Cytogenetics Laboratory, Department of Human Genetics, Guru Nanak Dev University)
Sambyal, Vasudha (Human Cytogenetics Laboratory, Department of Human Genetics, Guru Nanak Dev University)
Guleria, Kamlesh (Human Cytogenetics Laboratory, Department of Human Genetics, Guru Nanak Dev University)
Manjari, Mridu (Department of Pathology, Sri Guru Ram Das Institute of Medical Sciences and Research)
Sudan, Meena (Department of Radiotherapy, Sri Guru Ram Das Institute of Medical Sciences and Research)
Uppal, Manjit Singh (Department of Surgery, Sri Guru Ram Das Institute of Medical Sciences and Research)
Singh, Neeti Rajan (Department of Surgery, Sri Guru Ram Das Institute of Medical Sciences and Research)
Singh, Gursimran (Dr. D.Y. Patel Medical College and Hospital)
Singh, Harpreet (Liver & Digestive Diseases Centre)
Publication Information
Asian Pacific Journal of Cancer Prevention / v.15, no.19, 2014 , pp. 8413-8422 More about this Journal
Abstract
Background: To investigate the relationship of five TP53 polymorphisms (p.P47S, p.R72P, PIN3 ins16bp, p.R213R and r.13494g>a) with the esophageal cancer (EC) risk in North Indians. Materials and Methods: Genotyping of p.P47S, p.R72P, PIN3 ins16bp, p.R213R and r.13494g>a polymorphisms of TP53 in 136 sporadic EC patients and 136 controls using polymerase chain reaction and PCR-RFLP. Results: The frequencies of genotype RR, RP and PP of p.R72P polymorphism were 16.91 vs 26.47%, 58.82 vs 49.27% and 24.27 vs 24.27% among patients and controls respectively. We observed significantly increased frequency of RP genotype in cases as compared to controls (OR=1.87, 95% CI, 1.01-3.46, p=0.05). The frequencies of genotype A1A1, A1A2 and A2A2 of PIN3 ins16bp polymorphism were 69.12 vs 70.59%, 27.20 vs 25% and 3.68 vs 4.41% among patients and controls. There was no significant difference among genotype and allele distribution between patients and controls. The frequencies of genotype GG, GA and AA of r.13494g>a polymorphism were 62.50 vs 64.70%, 34.56 vs 30.15% and 2.94 vs 5.15% among patients and controls respectively. No significant difference between genotype and allele frequency was observed in the patients and controls. For p.P47S and p.R213R polymorphisms, all the cases and controls had homozygous wild type genotype. The RP-A1A1-GG genotype combination shows significant risk for EC (OR=2.01, 95%CI: 1.01-3.99, p=0.05). Conclusions: Among the five TP53 polymorphisms investigated, only p.R72P polymorphism may contributes to EC susceptibility.
Keywords
Esophageal cancer; TP53; polymorphism;
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