期刊
SCIENTIFIC REPORTS
卷 10, 期 1, 页码 -出版社
NATURE RESEARCH
DOI: 10.1038/s41598-020-57599-2
关键词
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资金
- Swedish Research Council [2013-03950, 2017-01777]
- Swedish Society for Medical Research
- Swedish Diabetes Association
- Diabetes Wellness foundation
- Magnus Bergvalls Stiftelse
- Jeanssons Stiftelser
- Ake Wibergs Stiftelse
- Stiftelsen Sigurd och Elsa Goljes Minne
- O.E och Edla Johanssons vetenskapliga stiftelse
- Eva och Oscar Ahrens Stiftelse
- Karolinska Institutet
- Karolinska Institute
- Swedish Research Council [2013-03950] Funding Source: Swedish Research Council
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.
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