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- Title
A genome-wide scan for human obesity genes reveals a major susceptibility locus on chromosome 10.
- Authors
Hager, Jörg; Dina, Christian; Francke, Stephan; Dubois, Severine; Houari, Mouna; Vatin, Vincent; Vaillant, Emmanuel; Lorentz, Nathalie; Basdevant, Arnaud; Clement, Karine; Guy-Grand, Bernard; Froguel, Philippe
- Abstract
Obesity, a common multifactorial disorder, is a major risk factor for type 2 diabetes, hypertension and coronary heart disease (CHD). According to the definition of the World Health Organization (WHO), approximately 6-10% of the population in Westernized countries are considered obese. Epidemiological studies have shown that 30-70% of the variation in body weight may be attributable to genetic factors. To date, two genomewide scans using different obesityrelated quantitative traits have provided candidate regions for obesity. We have undertaken a genome-wide scan in affected sibpairs to identify chromosomal regions linked to obesity in a collection of French families. Model-free multipoint linkage analyses revealed evidence for linkage to a region on chromosome 10p (MLS=4.85). Two further loci on chromosomes 5cen-q and 2p showed suggestive evidence for linkage of serum leptin levels in a genomewide context. The peak on chromosome 2 coincided with the region containing the gene (POMC) encoding pro-opiomelanocortin, a locus previously linked to leptin levels and fat mass in a Mexican-American population and shown to be mutated in obese humans. Our results suggest that there is a major gene on chromosome 10p implicated in the development of human obesity, and the existence of two further loci influencing leptin levels.
- Subjects
OBESITY genetics; HUMAN chromosomes
- Publication
Nature Genetics, 1998, Vol 20, Issue 3, p304
- ISSN
1061-4036
- Publication type
Article
- DOI
10.1038/3123