| First Author | Ning FC | Year | 2020 |
| Journal | Sci Rep | Volume | 10 |
| Issue | 1 | Pages | 923 |
| PubMed ID | 31969592 | Mgi Jnum | J:293950 |
| Mgi Id | MGI:6407349 | Doi | 10.1038/s41598-020-57599-2 |
| Citation | Ning FC, et al. (2020) VEGF-B ablation in pancreatic beta-cells upregulates insulin expression without affecting glucose homeostasis or islet lipid uptake. Sci Rep 10(1):923 |
| abstractText | Type 2 diabetes mellitus (T2DM) affects millions of people and is linked with obesity and lipid accumulation in peripheral tissues. Increased lipid handling and lipotoxicity in insulin producing beta-cells may contribute to beta-cell dysfunction in T2DM. The vascular endothelial growth factor (VEGF)-B regulates uptake and transcytosis of long-chain fatty acids over the endothelium to tissues such as heart and skeletal muscle. Systemic inhibition of VEGF-B signaling prevents tissue lipid accumulation, improves insulin sensitivity and glucose tolerance, as well as reduces pancreatic islet triglyceride content, under T2DM conditions. To date, the role of local VEGF-B signaling in pancreatic islet physiology and in the regulation of fatty acid trans-endothelial transport in pancreatic islet is unknown. To address these questions, we have generated a mouse strain where VEGF-B is selectively depleted in beta-cells, and assessed glucose homeostasis, beta-cell function and islet lipid content under both normal and high-fat diet feeding conditions. We found that Vegfb was ubiquitously expressed throughout the pancreas, and that beta-cell Vegfb deletion resulted in increased insulin gene expression. However, glucose homeostasis and islet lipid uptake remained unaffected by beta-cell VEGF-B deficiency. |
