title: XbaI polymorphisms of apolipoprotein B gene: another risk factor of gallstone formation after radical gastrectomy.
abstract: OBJECTIVE
  To prospectively investigate the association between the XbaI polymorphisms of apolipoprotein B (APOB) gene and gallstone formation following gastrectomy.
  
  
  METHODS
  The study was conducted between January 2005 and December 2006. A total of 186 gastric cancer patients who had undergone radical gastrectomy were grouped according to XbaI polymorphisms of APOB gene (X(+)X(-) group, n = 24 and X(-)X(-) group, n = 162) and compared. The XbaI polymorphisms of APOB gene were detected by polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP).
  
  
  RESULTS
  The incidence of gallstone was significantly higher in the X(+)X(-) group than in the X(-)X(-) group [54.2% vs 9.3%, RR = 5.85 (2.23-15.32), P < 0.001]. The serum levels of total cholesterol (TC) and low-density lipoprotein (LDL) were higher in the X(+)X(-) than in the X(-)X(-) group (4.02 +/- 1.12 vs 3.48 +/- 0.88, P = 0.004 before surgery and 3.88 +/- 1.09 vs 3.40 +/- 0.86, P = 0.008 after surgery). LDL was 2.21 +/- 0.96 vs 1.89 +/- 0.84 (P = 0.042) before surgery and 2.09 +/- 0.95 vs 1.72 +/- 0.85 (P = 0.029) after surgery in the two groups. No relationship was found between XbaI polymorphisms and gallbladder motility.
  
  
  CONCLUSIONS
  In Chinese patients after radical gastrectomy, X(+) allele of APOB gene is another risk factor for the development of gallstone besides the gallbladder motility disorder after surgery.
authors.affiliation: Department of General Surgery, Zhongshan Hospital, Fudan University, #180 Fenglin Road, Shanghai 200032, China.
authors.forename: Feng-Lin
authors.initials: FL
authors.lastname: Liu
authors.forename: Wen-Bin
authors.initials: WB
authors.lastname: Lu
authors.forename: Wei-Xin
authors.initials: WX
authors.lastname: Niu
mesh_terms: D000483:Alleles; D001055:Apolipoproteins B / Q000097:blood / Q000235:genetics*; D002784:Cholesterol / Q000097:blood; D008078:Cholesterol, LDL / Q000097:blood; D042882:Gallstones / Q000209:etiology* / Q000235:genetics; D005743:Gastrectomy / Q000009:adverse effects*; D006801:Humans; D008297:Male; D008875:Middle Aged; D011110:Polymorphism, Genetic; D012189:Retrospective Studies; D012307:Risk Factors; D013274:Stomach Neoplasms / Q000473:pathology / Q000601:surgery
chemical_list: D001055:Apolipoproteins B; D008078:Cholesterol, LDL; D002784:Cholesterol