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. 2000 Dec 19;97(26):14478-83.
doi: 10.1073/pnas.97.26.14478.

Quantitative Trait Loci on Chromosomes 3 and 17 Influence Phenotypes of the Metabolic Syndrome

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Free PMC article

Quantitative Trait Loci on Chromosomes 3 and 17 Influence Phenotypes of the Metabolic Syndrome

A H Kissebah et al. Proc Natl Acad Sci U S A. .
Free PMC article

Abstract

Recent research has emphasized the importance of the metabolic cluster, which includes glucose intolerance, dyslipidemia, and high blood pressure, as a strong predictor of the obesity-related morbidities and premature mortality. Fundamental to this association, commonly referred to as the metabolic syndrome, is the close interaction between abdominal fat patterning, total body adiposity, and insulin resistance. As the initial step in identifying major genetic loci influencing these phenotypes, we performed a genomewide scan by using a 10-centiMorgan map in 2,209 individuals distributed over 507 nuclear Caucasian families. Pedigree-based analysis using a variance components linkage model demonstrated a quantitative trait locus (QTL) on chromosome 3 (3q27) strongly linked to six traits representing these fundamental phenotypes [logarithm of odds (lod) scores ranged from 2.4 to 3.5]. This QTL exhibited possible epistatic interaction with a second QTL on chromosome 17 (17p12) strongly linked to plasma leptin levels (lod = 5.0). Situated at these epistatic QTLs are candidate genes likely to influence two biologic precursor pathways of the metabolic syndrome.

Figures

Figure 1
Figure 1
Multipoint linkage lod scores by chromosome for BMI, waist circumference, and plasma insulin levels.
Figure 2
Figure 2
Multipoint linkage map and lod scores on chromosome 3 for phenotypic cluster fundamental to abdominal obesity-metabolic syndrome.

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