A systems genetics approach identifies genes and pathways for type 2 diabetes in human islets.

Jalal Taneera, Stefan Lang, Amitabh Sharma, Joao Fadista, Yuedan Zhou, Emma Ahlqvist, Anna Jonsson, Valeriya Lyssenko, Petter Vikman, Ola Hansson, Hemang Parikh, Olle Korsgren, Arvind Soni, Ulrika Krus, Enming Zhang, Xingjun Jing, Jonathan Esguerra, Claes Wollheim, S Albert Salehi, Anders RosengrenErik Renström, Leif Groop

Research output: Contribution to journalArticlepeer-review

267 Citations (SciVal)


Close to 50 genetic loci have been associated with type 2 diabetes (T2D), but they explain only 15% of the heritability. In an attempt to identify additional T2D genes, we analyzed global gene expression in human islets from 63 donors. Using 48 genes located near T2D risk variants, we identified gene coexpression and protein-protein interaction networks that were strongly associated with islet insulin secretion and HbA(1c). We integrated our data to form a rank list of putative T2D genes, of which CHL1, LRFN2, RASGRP1, and PPM1K were validated in INS-1 cells to influence insulin secretion, whereas GPR120 affected apoptosis in islets. Expression variation of the top 20 genes explained 24% of the variance in HbA(1c) with no claim of the direction. The data present a global map of genes associated with islet dysfunction and demonstrate the value of systems genetics for the identification of genes potentially involved in T2D.
Original languageEnglish
Pages (from-to)122-134
JournalCell Metabolism
Issue number1
Publication statusPublished - 2012

Subject classification (UKÄ)

  • Cell and Molecular Biology


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