Journal Article

Genetic Causes of Monogenic Heterozygous Familial Hypercholesterolemia: A HuGE Prevalence Review

Melissa A. Austin, Carolyn M. Hutter, Ron L. Zimmern and Steve E. Humphries

in American Journal of Epidemiology

Published on behalf of Johns Hopkins Bloomberg School of Public Health

Volume 160, issue 5, pages 407-420
Published in print September 2004 | ISSN: 0002-9262
Published online September 2004 | e-ISSN: 1476-6256 | DOI: http://dx.doi.org/10.1093/aje/kwh236
Genetic Causes of Monogenic Heterozygous Familial Hypercholesterolemia: A HuGE Prevalence Review

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The clinical phenotype of heterozygous familial hypercholesterolemia (FH) is characterized by increased plasma levels of total cholesterol and low density lipoprotein cholesterol, tendinous xanthomata, and premature symptoms of coronary heart disease. It is inherited as an autosomal dominant disorder with homozygotes having a more severe phenotype than do heterozygotes. FH can result from mutations in the low density lipoprotein receptor gene (LDLR), the apolipoprotein B-100 gene (APOB), and the recently identified proprotein convertase subtilisin/kexin type 9 gene (PCSK9). To date, over 700 variants have been identified in the LDLR gene. With the exception of a small number of founder populations where one or two mutations predominate, most geographically based surveys of FH subjects show a large number of mutations segregating in a given population. Studies of the prevalence of FH would be improved by the use of a consistent and uniformly applied clinical definition. Because FH responds well to drug treatment, early diagnosis to reduce atherosclerosis risk is beneficial. Cascade testing of FH family members is cost effective and merits further research. For screening to be successful, public health and general practitioners need to be aware of the signs and diagnosis of FH and the benefits of early treatment.

Keywords: APOB; epidemiology; genetics; hypercholesterolemia, familial; LDLR; receptors, LDL; Abbreviations: FH, familial hypercholesterolemia; LDL, low density lipoprotein.

Journal Article.  10560 words.  Illustrated.

Subjects: Public Health and Epidemiology

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