Isolation of a Genomic Region Affecting Most Components of Metabolic Syndrome in a Chromosome-16 Congenic Rat Model

0471751 - ÚMG 2017 RIV US eng J - Článek v odborném periodiku
Šedová, Lucie - Pravenec, Michal - Křenová, D. - Kazdová, L. - Zídek, Václav - Krupková, M. - Liška, F. - Křen, Vladimír - Šeda, Ondřej
Isolation of a Genomic Region Affecting Most Components of Metabolic Syndrome in a Chromosome-16 Congenic Rat Model.
PLoS ONE. Roč. 11, č. 3 (2016), č. článku e0152708. ISSN 1932-6203. E-ISSN 1932-6203
Grant CEP: GA MŠMT(CZ) LL1204; GA MŠMT(CZ) ED1.1.00/02.0109; GA ČR(CZ) GAP301/12/0696
Institucionální podpora: RVO:67985823 ; RVO:68378050
Klíčová slova: quantitative trait loci * blood-pressure * genetic-determinants * glucose-tolerance * hypertensive-rat * strains * reveals * identification * mechanisms * phenotypes
Kód oboru RIV: EB - Genetika a molekulární biologie
Impakt faktor: 2.806, rok: 2016

Metabolic syndrome is a highly prevalent human disease with substantial genomic and environmental components. Previous studies indicate the presence of significant genetic determinants of several features of metabolic syndrome on rat chromosome 16 (RNO16) and the syntenic regions of human genome. We derived the SHR. BN16 congenic strain by introgression of a limited RNO16 region from the Brown Norway congenic strain (BN-Lx) into the genomic background of the spontaneously hypertensive rat (SHR) strain. We compared the morphometric, metabolic, and hemodynamic profiles of adult male SHR and SHR. BN16 rats. We also compared in silico the DNA sequences for the differential segment in the BN-Lx and SHR parental strains. SHR. BN16 congenic rats had significantly lower weight, decreased concentrations of total triglycerides and cholesterol, and improved glucose tolerance compared with SHR rats. The concentrations of insulin, free fatty acids, and adiponectin were comparable between the two strains. SHR. BN16 rats had significantly lower systolic (18-28 mmHg difference) and diastolic (10-15 mmHg difference) blood pressure throughout the experiment (repeated-measures ANOVA, P < 0.001). The differential segment spans approximately 22 Mb of the telomeric part of the short arm of RNO16. The in silico analyses revealed over 1200 DNA variants between the BN-Lx and SHR genomes in the SHR. BN16 differential segment, 44 of which lead to missense mutations, and only eight of which (in Asb14, Il17rd, Itih1, Syt15, Ercc6, RGD1564958, Tmem161a, and Gatad2a genes) are predicted to be damaging to the protein product. Furthermore, a number of genes within the RNO16 differential segment associated with metabolic syndrome components in human studies showed polymorphisms between SHR and BN-Lx including Lpl, Nrg3, Pbx4, Cilp2, and Stab1. Our novel congenic rat model demonstrates that a limited genomic region on RNO16 in the SHR significantly affects many of the features of metabolic syndrome.
Trvalý link: http://hdl.handle.net/11104/0269084