title: DNMT3B -579 G>T promoter polymorphism and risk of gallbladder carcinoma in North Indian population.
abstract: OBJECTIVE
  Carcinoma of gallbladder (GBC) is a relatively rare but highly fatal disease. The DNA (cytosine-5-)-methyltransferase 3 beta (DNMT3B) -579 G>T promoter polymorphism (rs1569686) influences gene function and has been associated with various malignancies. Present population-based case-control study was undertaken to examine the potential association of DNMT3B -579 G>T variation with GBC in North Indian population.
  
  
  METHODS
  Genotypes and allelic frequencies of the DNMT3B -579 G>T polymorphism were determined for 212 GBC patients and 219 controls using PCR-RFLP. Odds ratio (OR) and 95% confidence interval (95% CI) were calculated for the association of DNMT3B polymorphism with GBC. Analysis of potential transcription factor binding sites was also identified in the region harboring the polymorphism.
  
  
  RESULTS
  The DNMT3B -579 G>T polymorphism was found to be non-significantly associated with an overall increased risk of GBC (OR = 1.10 and 1.56 for T/G and G/G genotypes, respectively, P (trend) = 0.227). The increased risk was predominant in both male and female cohorts and also non-significantly in GBC patients with gallstone status (OR = 1.44; P = 0.280, OR = 1.06; P = 0.804 and OR = 1.45; P = 0.143, respectively).
  
  
  CONCLUSIONS
  DNMT3B -579 G>T polymorphism may alter susceptibility to GBC although it may not play a major role in the pathoetiology of this disease in North Indian population.
authors.affiliation: Department of Genetics, Sanjay Gandhi Post Graduate Institute of Medical Sciences, Lucknow 226014, India.
authors.forename: Kshitij
authors.initials: K
authors.lastname: Srivastava
authors.forename: Anvesha
authors.initials: A
authors.lastname: Srivastava
authors.forename: Balraj
authors.initials: B
authors.lastname: Mittal
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002277:Carcinoma / Q000150:complications / Q000235:genetics*; D016022:Case-Control Studies; D004248:DNA (Cytosine-5-)-Methyltransferases / Q000235:genetics*; D005260:Female; D005706:Gallbladder Neoplasms / Q000150:complications / Q000235:genetics*; D042882:Gallstones / Q000150:complications / Q000235:genetics; D020022:Genetic Predisposition to Disease; D005838:Genotype; D006801:Humans; D007194:India; D008297:Male; D008875:Middle Aged; D016133:Polymerase Chain Reaction; D012150:Polymorphism, Restriction Fragment Length; D020641:Polymorphism, Single Nucleotide; D011401:Promoter Regions, Genetic / Q000235:genetics*; D000097584:DNA Methyltransferase 3B
chemical_list: D004248:DNA (Cytosine-5-)-Methyltransferases; D000097584:DNA Methyltransferase 3B