title: Variability gene effects of DNA polymorphisms at the apo B, apo A I/C III and apo E loci on serum lipids: the Cardiovascular Risk in Young Finns Study.
abstract: We studied the influence of selected genetic markers on the intra-individual long-term variability in serum lipid levels. The study cohort consisted of a sub-sample from a large follow-up study of atherosclerosis precursors in children and young adults. A total of 320 subjects had determinations of apo B XbaI RFLP genotypes, 305 subjects had apo AI/CIII SstI RFLP genotype determinations and 1581 subjects had their apo E phenotypes determined. Complete data on serum lipids were available at 3-year intervals over a 6-year follow-up period. The subjects were healthy and aged 3-18 years at baseline. Intra-individual variability was assessed with a nested analysis of variance procedure. Each of the genetic markers studied here significantly affected intra-individual variability of serum lipid levels. No clear sex influence was observed, although the differences in variability tended to be more significant in males. Apo B XbaI genotypes significantly influenced intra-individual variability of total and LDL-cholesterol levels in both sexes. A marked effect of the XbaI genotype was also found on triglyceride variability. In males the standardized intra-individual triglyceride variances were 0.71 and 0.34 in genotypes X1X1 and X2X2, respectively (p < 0.001), with a clear gene dosage effect. The apo AI/CIII genotype had an influence only on the variability of total cholesterol and LDL-cholesterol levels and only in males. The apo E phenotypes were associated with intra-individual variability in total and LDL-cholesterol levels but again, only in males.(ABSTRACT TRUNCATED AT 250 WORDS)
authors.affiliation: Cardiorespiratory Research Unit, University of Turku, Finland.
authors.forename: K V
authors.initials: KV
authors.lastname: Porkka
authors.forename: S
authors.initials: S
authors.lastname: Taimela
authors.forename: K
authors.initials: K
authors.lastname: Kontula
authors.forename: T
authors.initials: T
authors.lastname: Lehtimäki
authors.forename: K
authors.initials: K
authors.lastname: Aalto-Setälä
authors.forename: H K
authors.initials: HK
authors.lastname: Akerblom
authors.forename: J S
authors.initials: JS
authors.lastname: Viikari
mesh_terms: D000293:Adolescent; D000704:Analysis of Variance; D016632:Apolipoprotein A-I / Q000235:genetics; D053305:Apolipoprotein C-III; D001053:Apolipoproteins / Q000235:genetics*; D001055:Apolipoproteins B / Q000235:genetics; D001056:Apolipoproteins C / Q000235:genetics; D001057:Apolipoproteins E / Q000235:genetics; D016009:Chi-Square Distribution; D002648:Child; D002675:Child, Preschool; D002784:Cholesterol / Q000097:blood; D008076:Cholesterol, HDL / Q000097:blood; D008078:Cholesterol, LDL / Q000097:blood; D015243:Cholesterol, VLDL / Q000097:blood; D015331:Cohort Studies; D003327:Coronary Disease / Q000453:epidemiology / Q000235:genetics*; D005260:Female; D005387:Finland / Q000453:epidemiology; D005819:Genetic Markers; D014644:Genetic Variation; D005838:Genotype; D006801:Humans; D008055:Lipids / Q000097:blood*; D008297:Male; D010641:Phenotype; D012150:Polymorphism, Restriction Fragment Length; D011237:Predictive Value of Tests; D012307:Risk Factors; D012737:Sex Factors; D014280:Triglycerides / Q000097:blood
chemical_list: D016632:Apolipoprotein A-I; D053305:Apolipoprotein C-III; D001053:Apolipoproteins; D001055:Apolipoproteins B; D001056:Apolipoproteins C; D001057:Apolipoproteins E; D008076:Cholesterol, HDL; D008078:Cholesterol, LDL; D015243:Cholesterol, VLDL; D005819:Genetic Markers; D008055:Lipids; D014280:Triglycerides; D002784:Cholesterol