title: [Analysis on the association between two polymorphism haplotypes of lipoprotein lipase gene and serum lipids in twins of China].
abstract: OBJECTIVE
  To investigate the association between haplotypes of S447X and Hind III polymorphisms of lipoprotein lipase (LPL) gene and serum lipids in a population-based twin cohort study in China.
  
  
  METHODS
  Twin subjects were collected based on the twin registry system of China. All twins were investigated by a standard questionnaire and physical examinations. Polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) method was used to detect the genotypes of S447X and Hind III polymorphisms. Linkage disequilibrium test and haplotypes were estimated between two polymorphisms.
  
  
  RESULTS
  Nine hundred and eighty-seven pairs of twins were eligible for analysis. The two polymorphisms of LPL gene were significantly linkage disequilibrium. In female twins, the H- allele of Hind III polymorphism was significantly related to lower levels of triglycerides(TG) and lower risk of high TG dislipidemia, but those associations disappeared after adjusting the polymorphism of S447X. The H- X haplotype of those two polymorphisms was significantly related to lower TG and TG/HDL (decreasing 12.9% and 14.9% respectively), as well as significantly to lower risk of high TG dislipidemia (OR = 0.40).
  
  
  CONCLUSIONS
  The haplotypes of S447X and Hind III polymorphisms were significantly related to the favorable effect of lipids,but this effect was mostly determined by the polymorphism of S447X, while the effect of Hind III polymorphism was indirectly influenced by the linkage disequilibrium with S447X polymorphism.
authors.affiliation: Department of Information Management, National Center for Women and Children's Health, Chinese Center for Disease Control and Prevention, Beijing 100013, China.
authors.forename: Ai-qun
authors.initials: AQ
authors.lastname: Huang
authors.forename: Yong-hua
authors.initials: YH
authors.lastname: Hu
authors.forename: Si-yan
authors.initials: SY
authors.lastname: Zhan
authors.forename: Jun
authors.initials: J
authors.lastname: Lv
authors.forename: Ying
authors.initials: Y
authors.lastname: Qin
authors.forename: Wei-hua
authors.initials: WH
authors.lastname: Cao
authors.forename: Li-ming
authors.initials: LM
authors.lastname: Li
mesh_terms: D000328:Adult; D005260:Female; D006239:Haplotypes / Q000235:genetics*; D006801:Humans; D015810:Linkage Disequilibrium / Q000235:genetics; D008055:Lipids / Q000097:blood*; D008071:Lipoprotein Lipase / Q000235:genetics*; D008297:Male; D008875:Middle Aged; D016133:Polymerase Chain Reaction; D011110:Polymorphism, Genetic / Q000235:genetics*; D012150:Polymorphism, Restriction Fragment Length / Q000235:genetics; D014427:Twins / Q000097:blood* / Q000235:genetics*
chemical_list: D008055:Lipids; D008071:Lipoprotein Lipase