Candidate genes for obesity revealed from a C57BL/6J x 129S1/SvImJ intercross.

International Journal of Obesity : Journal of the International Association for the Study of Obesity
Zhiguang SuBeverly Paigen

Abstract

To identify the genes controlling body fat, we carried out a quantitative trait locus (QTL) analysis using C57BL/6J (B6) and 129S1/SvImJ (129) mice, which differ in obesity susceptibility after consuming an atherogenic diet. Mice were fed chow until 8 weeks and an atherogenic diet from 8 to 16 weeks; body fatness was measured by X-ray absorptiometry in 528 (B6 x 129) F(2) at 8 and 16 weeks. A high-density genome scan was performed using 508 polymorphic markers. After identifying the genetic loci, we narrowed the QTL using comparative genomics and bioinformatics. The percentage of body fat was significantly linked to loci on chromosomes (Chr) 1 (22, 68 and 173 Mb), 4 (74 Mb), 5 (73 Mb), 7 (88 Mb), 8 (43 and 80 Mb), 9 (55 Mb), 11 (115 Mb) and 12 (32 Mb); three suggestive loci on Chrs 6 (76 Mb), 9 (30 Mb) and 16 (26 Mb) and two pairs of interacting loci (Chr 2 at 99.8 Mb with Chr 7; Chr 1 at 68 Mb with Chr 11). Comparative genomics narrowed the QTL intervals by 20-57% depending on the chromosome; in most cases, haplotype analysis further narrowed them by about 90%. Our analysis identified 15 QTL for percentage of body fat. We narrowed the QTL using comparative genomics and haplotype analysis and suggest several candidate genes: Ap...Continue Reading

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Citations

Nov 8, 2008·Arteriosclerosis, Thrombosis, and Vascular Biology·Zhiguang SuBeverly Paigen
Mar 30, 2011·Journal of Lipid Research·Magalie S LeducRon Korstanje
May 14, 2009·Journal of Lipid Research·Zhiguang SuIoannis M Stylianou
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Dec 6, 2008·American Journal of Hypertension·Holger StepanMathias Fasshauer
Mar 14, 2018·The Journal of Biological Chemistry·Yanjie ZhangZhiguang Su
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May 13, 2021·Animal Microbiome·Elizabeth M HillEldin Jašarević
Mar 24, 2009·Metabolism: Clinical and Experimental·Thomas EbertMathias Fasshauer

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