Title |
A collective diabetes cross in combination with a computational framework to dissect the genetics of human obesity and Type 2 diabetes
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Published in |
Human Molecular Genetics, June 2018
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DOI | 10.1093/hmg/ddy217 |
Pubmed ID | |
Authors |
Heike Vogel, Anne Kamitz, Nicole Hallahan, Sandra Lebek, Tanja Schallschmidt, Wenke Jonas, Markus Jähnert, Pascal Gottmann, Lisa Zellner, Timo Kanzleiter, Mareike Damen, Delsi Altenhofen, Ralph Burkhardt, Simone Renner, Maik Dahlhoff, Eckhard Wolf, Timo D Müller, Matthias Blüher, Hans-Georg Joost, Alexandra Chadt, Hadi Al-Hasani, Annette Schürmann |
Abstract |
To explore the genetic determinants of obesity and type 2 diabetes (T2D), the German Center for Diabetes Research (DZD) conducted crossbreedings of the obese and diabetes-prone NZO mouse strain with four different lean strains (B6, DBA, C3H, 129P2) which vary in their susceptibility to develop T2D. Genome-wide linkage analyses localized more than 290 QTL for obesity, 190 QTL for diabetes-related traits, and 100 QTL for plasma metabolites in the outcross populations. A computational framework was developed that allowed to refine critical regions and to nominate a small number of candidate genes by integrating reciprocal haplotype mapping and transcriptome data. The efficiency of the complex procedure was demonstrated for one obesity QTL. The genomic interval of 35 Mb with 502 annotated candidate genes was narrowed down to six candidates. Accordingly, congenic mice retained the obesity phenotype due to an interval that contains three of the six candidate genes. Among these the phospholipase PLA2G4A exhibited an elevated expression in adipose tissue of obese human subjects and is therefore a critical regulator of the obesity locus. Together, our broad and complex approach demonstrates that combined- and comparative-cross analysis exhibits improved mapping resolution and represents a valid tool for the identification of disease genes. |
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Student > Master | 4 | 13% |
Student > Ph. D. Student | 4 | 13% |
Researcher | 3 | 10% |
Student > Doctoral Student | 2 | 6% |
Other | 2 | 6% |
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Nursing and Health Professions | 1 | 3% |
Other | 2 | 6% |
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