4.8 Article

Involvement of the Adhesion GPCRs Latrophilins in the Regulation of Insulin Release

期刊

CELL REPORTS
卷 26, 期 6, 页码 1573-+

出版社

CELL PRESS
DOI: 10.1016/j.celrep.2019.01.040

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资金

  1. European Social Fund
  2. German Research Foundation [DFG: FOR 2149/P02, DFG: FOR 2149/P04, SFB 1052/B6, Th1671/2-1]
  3. German Federal Ministry of Education and Research [BMBF: IFB AdipositasDiseases Leipzig K7-75, 01EO1501]
  4. German Diabetes Society (DDG)

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Insulin secretion from pancreatic beta cells is a highly complex and tightly regulated process. Its dysregulation is one characteristic of type 2 diabetes, and thus, an in-depth understanding of the mechanisms controlling insulin secretion is essential for rational therapeutic intervention. G-protein-coupled receptors (GPCRs) have been established as major regulators of insulin exocytosis. Recent studies also suggest the involvement of adhesion GPCRs, a non-prototypical class of GPCRs. Here, we identify latrophilins, which belong to the class of adhesion GPCRs, to be highly expressed in different cell types of pancreatic islets. In vitro and ex vivo analyses show that distinct splice variants of the latrophilin LPHN3/ADGRL3 decrease insulin secretion from pancreatic beta cells by reducing intracellular cyclic AMP levels via the G(i)-mediated pathway. Our data highlight the key role of LPHN3 in modulating insulin secretion and its potential as therapeutic target for type 2 diabetes.

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