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Deprecated: Implicit conversion from float 231.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Nat+Commun 2017 ; 8 (ä): ä Nephropedia Template TP
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Sox5 regulates beta-cell phenotype and is reduced in type 2 diabetes #MMPMID28585545
Axelsson AS; Mahdi T; Nenonen HA; Singh T; Hänzelmann S; Wendt A; Bagge A; Reinbothe TM; Millstein J; Yang X; Zhang B; Gusmao EG; Shu L; Szabat M; Tang Y; Wang J; Salö S; Eliasson L; Artner I; Fex M; Johnson JD; Wollheim CB; Derry J; Mecham B; Spégel P; Mulder H; Costa I; Zhang E; Rosengren AH
Nat Commun 2017[]; 8 (ä): ä PMID28585545show ga
Type 2 diabetes (T2D) is characterized by insulin resistance and impaired insulin secretion, but the mechanisms underlying insulin secretion failure are not completely understood. Here, we show that a set of co-expressed genes, which is enriched for genes with islet-selective open chromatin, is associated with T2D. These genes are perturbed in T2D and have a similar expression pattern to that of dedifferentiated islets. We identify Sox5 as a regulator of the module. Sox5 knockdown induces gene expression changes similar to those observed in T2D and diabetic animals and has profound effects on insulin secretion, including reduced depolarization-evoked Ca2+-influx and ?-cell exocytosis. SOX5 overexpression reverses the expression perturbations observed in a mouse model of T2D, increases the expression of key ?-cell genes and improves glucose-stimulated insulin secretion in human islets from donors with T2D. We suggest that human islets in T2D display changes reminiscent of dedifferentiation and highlight SOX5 as a regulator of ?-cell phenotype and function.