title: A single nucleotide polymorphism in APOA5 determines triglyceride levels in Hong Kong and Guangzhou Chinese.
abstract: Single nucleotide polymorphisms (SNPs) in the apolipoprotein A5 (APOA5) gene have been associated with hypertriglyceridaemia. We investigated which SNPs in the APOA5 gene were associated with triglyceride levels in two independent Chinese populations. In all, 1375 subjects in the Hong Kong Cardiovascular Risk Factor Prevalence Study were genotyped for five tagging SNPs chosen from HapMap. Replication was sought in 1996 subjects from the Guangzhou Biobank Cohort Study. Among the five SNPs, rs662799 (-1131T>C) was strongly related to log-transformed triglyceride levels among Hong Kong subjects (β=0.192, P=2.6 × 10(-13)). Plasma triglyceride level was 36.1% higher in CC compared to TT genotype. This association was confirmed in Guangzhou subjects (β=0.159, P=1.3 × 10(-12)), and was significantly irrespective of sex, age group, obesity, metabolic syndrome, hypertension, diabetes, smoking and alcohol drinking. The odds ratios and 95% confidence interval for plasma triglycerides ≥1.7 mmol/l associated with TC and CC genotypes were, respectively, 1.81 (1.37-2.39) and 2.22 (1.44-3.43) in Hong Kong and 1.27 (1.05-1.54) and 1.97 (1.42-2.73) in Guangzhou. Haplotype analysis suggested the association was due to rs662799 only. The corroborative findings in two independent populations indicate that the APOA5-1131T>C polymorphism is an important and clinically relevant determinant of plasma triglyceride levels in the Chinese population.
authors.affiliation: Guangzhou no. 12 Hospital, Guangzhou, China.
authors.forename: Chao Qiang
authors.initials: CQ
authors.lastname: Jiang
authors.forename: Bin
authors.initials: B
authors.lastname: Liu
authors.forename: Bernard M Y
authors.initials: BM
authors.lastname: Cheung
authors.forename: Tai Hing
authors.initials: TH
authors.lastname: Lam
authors.forename: Jie Ming
authors.initials: JM
authors.lastname: Lin
authors.forename: Ya
authors.initials: Y
authors.lastname: Li Jin
authors.forename: Xiao Jun
authors.initials: XJ
authors.lastname: Yue
authors.forename: Kwok Leung
authors.initials: KL
authors.lastname: Ong
authors.forename: Sidney
authors.initials: S
authors.lastname: Tam
authors.forename: Ka Sing
authors.initials: KS
authors.lastname: Wong
authors.forename: Brian
authors.initials: B
authors.lastname: Tomlinson
authors.forename: Karen S L
authors.initials: KS
authors.lastname: Lam
authors.forename: G Neil
authors.initials: GN
authors.lastname: Thomas
mesh_terms: D000328:Adult; D000368:Aged; D000072040:Apolipoprotein A-V; D001054:Apolipoproteins A / Q000235:genetics*; D044466:Asian People / Q000235:genetics*; D002318:Cardiovascular Diseases / Q000097:blood / Q000208:ethnology / Q000235:genetics; D002681:China / Q000453:epidemiology; D005260:Female; D005787:Gene Frequency; D020022:Genetic Predisposition to Disease; D005838:Genotype; D006723:Hong Kong / Q000453:epidemiology; D006801:Humans; D015810:Linkage Disequilibrium; D008297:Male; D015201:Meta-Analysis as Topic; D008875:Middle Aged; D015999:Multivariate Analysis; D020641:Polymorphism, Single Nucleotide; D015995:Prevalence; D012307:Risk Factors; D014280:Triglycerides / Q000097:blood*
chemical_list: C437704:APOA5 protein, human; D000072040:Apolipoprotein A-V; D001054:Apolipoproteins A; D014280:Triglycerides