title: Organic anion transporter protein (OATP1B1) encoded by SLCO1B1 gene polymorphism (388A>G) & susceptibility in gallstone disease.
abstract: OBJECTIVE
  Organic anion transport protein 1B1 (OATP1B1) is a major transporter protein for bile salt uptake in the enterohepatic circulation of bile salts. As the role of SLCO1B1 gene (encodes OATP1B1 or liver specific transporter-1) 388 A>G polymorphism in susceptibility towards gallstone disease is unclear the prevalence of this polymorphism in healthy north Indian population was investigated.
  
  
  METHODS
  Peripheral venous blood of 270 unrelated northern Indian patients with symptomatic gallstone disease and 270 unrelated healthy control subjects was screened for SLCO1B1 gene 388 A>G polymorphism by PCR-RFLP method and genotyping was done on 12 per cent polyacrylamide gel. The cross-sectional data on accrual of cases and controls were collected and odds ratio with 95 per cent CI calculated as for case-control design.
  
  
  RESULTS
  Allele frequencies of 388 G were 45 per cent in gallstone cases and 44 per cent in controls with no statistical significance. Genotype frequencies in gallstone cases and controls for, genotype AA were 30 and 32 per cent; AG: 51 and 47 per cent and GG: 16 and 21 per cent respectively. No significant association of any allele or genotype with gallstone disease was found.
  
  
  CONCLUSIONS
  Although the prevalence of SLCO1B1 gene 388A>G polymorphism in north Indian population in high, yet this polymorphism does not appear to play a significant role in susceptibility to gallstone formation.
authors.affiliation: Department of Genetics, Sanjay Gandhi Post Graduate Institute of Medical Sciences, Lucknow, India.
authors.forename: Charulata
authors.initials: C
authors.lastname: Jindal
authors.forename: Sandeep
authors.initials: S
authors.lastname: Kumar
authors.forename: Gourdas
authors.initials: G
authors.lastname: Choudhari
authors.forename: Himanshu
authors.initials: H
authors.lastname: Goel
authors.forename: Balraj
authors.initials: B
authors.lastname: Mittal
mesh_terms: D003430:Cross-Sectional Studies; D042882:Gallstones / Q000453:epidemiology* / Q000235:genetics*; D005787:Gene Frequency; D020022:Genetic Predisposition to Disease / Q000235:genetics*; D005838:Genotype; D006801:Humans; D007194:India / Q000453:epidemiology; D027381:Liver-Specific Organic Anion Transporter 1; D016017:Odds Ratio; D027361:Organic Anion Transporters / Q000235:genetics*; D012150:Polymorphism, Restriction Fragment Length; D020641:Polymorphism, Single Nucleotide / Q000235:genetics*
chemical_list: D027381:Liver-Specific Organic Anion Transporter 1; D027361:Organic Anion Transporters; C503999:SLCO1B1 protein, human