A longitudinal genetic study of plasma lipids in adolescent twins

Middelberg, Rita P. S., Martin, Nicholas G. and Whitfield, John B. (2007) A longitudinal genetic study of plasma lipids in adolescent twins. Twin Research & Human Genetics, 10 1: 127-135. doi:10.1375/twin.10.1.127

Author Middelberg, Rita P. S.
Martin, Nicholas G.
Whitfield, John B.
Title A longitudinal genetic study of plasma lipids in adolescent twins
Journal name Twin Research & Human Genetics   Check publisher's open access policy
ISSN 1832-4274
Publication date 2007-02
Sub-type Article (original research)
DOI 10.1375/twin.10.1.127
Volume 10
Issue 1
Start page 127
End page 135
Total pages 9
Editor K. M. Kirk
N. G. Martin
Place of publication Bowen Hills, Australia
Publisher Australian Academic Press
Collection year 2008
Language eng
Subject 320303 Medical Biochemistry - Lipids
730106 Cardiovascular system and diseases
Abstract Plasma lipids such as high-density lipoprotein (HDL), low-density lipoprotein (LDL), total cholesterol and triglyceride levels contribute to variation in the risk of cardiovascular disease. The early stages of atherosclerosis in childhood have also been associated with changes in triglycerides, LDL and HDL. Heritability estimates for lipids and lipoproteins for adolescents are in the range .71 to .82, but little is known about changes of genetic and environmental influences over time in adolescence. We have investigated the contribution of genetic and environmental influences to variation in lipids in adolescent twins and their nontwin siblings using longitudinal twin and family data. Plasma HDL and LDL cholesterol, total cholesterol and triglycerides data from 965 twin pairs at 12, 14 and 16 years of age and their siblings have been analyzed. Longitudinal genetic models that included effects of age, sex and their interaction were fitted to assess whether the same or different genes influence each trait at different ages. Results suggested that more than one genetic factor influences HDL, LDL, total cholesterol and triglycerides over time at ages 12, 14 and 16 years. There was no evidence of shared environmental effects except for HDL and little evidence of long-term nonshared environmental effects was found. Our study suggested that there are developmental changes in the genes affecting plasma lipid concentrations across adolescence.
Keyword Adolescent
*Adolescent Development
Age Factors
Cardiovascular Diseases/blood/genetics
Lipoproteins, HDL/*blood/genetics
Lipoproteins, LDL/*blood/genetics
Longitudinal Studies
Models, Genetic
Sex Factors
Time Factors
Q-Index Code C1
Q-Index Status Confirmed Code

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Created: Mon, 03 Mar 2008, 11:26:37 EST