Association between p16, hMLH1 and E-cadherin promoter hypermethylation and intake of local hot salted tea and sun-dried foods in Kashmiris with gastric tumors

Asian Pac J Cancer Prev. 2012;13(1):181-6. doi: 10.7314/apjcp.2012.13.1.181.

Abstract

The aim of this study was to evaluate the methylation status of three important cancer related genes viz. p16, E-cadherin and hMLH1 promoters and to associate the findings with specific dietary habits in Kashmiris, a culturally distinct population in India, with gastric cancer. The study subjects were divided into three age groups viz. 0-30 yrs (1st), 31-60 yrs (2nd) and 61-90 yrs (3rd). A highly significant association between the intake of local hot salted tea in 2nd (p=0.001) and 3rd (p=0.009) age groups was observed with the promoter hypermethylation of E cadherin. Again a highly significant association between the aberrant methylation of hMLH1 (p=0.000) and p16 (p=0.000) promoters and the intake of local hot salted tea was observed in the 2nd age group of gastric cancer patients. The intake of sun-dried food was also significantly associated with the promoter hypermethylation of E cadherin (p=0.003) and p16 (p=0.015) genes in 3rd age group. The results of the present study suggest a close association between the aberrant methylation of p16, E-cadherin and hMLH1 promoters and the intake of local hot salted tea and sun-dried foods in Kashmiri population.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adaptor Proteins, Signal Transducing / genetics*
  • Adolescent
  • Adult
  • Aged
  • Aged, 80 and over
  • Cadherins / genetics*
  • Child
  • Child, Preschool
  • CpG Islands / genetics
  • Cyclin-Dependent Kinase Inhibitor p16
  • DNA Methylation*
  • DNA, Neoplasm / genetics
  • Female
  • Food, Preserved*
  • Hot Temperature
  • Humans
  • India / epidemiology
  • Infant
  • Infant, Newborn
  • Male
  • Middle Aged
  • MutL Protein Homolog 1
  • Neoplasm Proteins / genetics*
  • Nuclear Proteins / genetics*
  • Polymerase Chain Reaction
  • Prognosis
  • Promoter Regions, Genetic / genetics*
  • Stomach Neoplasms / epidemiology
  • Stomach Neoplasms / genetics*
  • Sunlight
  • Tea*
  • Young Adult

Substances

  • Adaptor Proteins, Signal Transducing
  • CDKN2A protein, human
  • Cadherins
  • Cyclin-Dependent Kinase Inhibitor p16
  • DNA, Neoplasm
  • MLH1 protein, human
  • Neoplasm Proteins
  • Nuclear Proteins
  • Tea
  • MutL Protein Homolog 1