| First Author | Jepsen SL | Year | 2019 |
| Journal | Am J Physiol Endocrinol Metab | Volume | 317 |
| Issue | 6 | Pages | E1081-E1093 |
| PubMed ID | 31503512 | Mgi Jnum | J:282930 |
| Mgi Id | MGI:6384166 | Doi | 10.1152/ajpendo.00239.2019 |
| Citation | Jepsen SL, et al. (2019) Paracrine crosstalk between intestinal L- and D-cells controls secretion of glucagon-like peptide-1 in mice. Am J Physiol Endocrinol Metab 317(6):E1081-E1093 |
| abstractText | DPP-4 inhibitors, used for treatment of type 2 diabetes, act by increasing the concentrations of intact glucagon-like peptide-1 (GLP-1), but at the same time, they inhibit secretion of GLP-1, perhaps by a negative feedback mechanism. We hypothesized that GLP-1 secretion is feedback regulated by somatostatin (SS) from neighboring D-cells, and blocking this feedback circuit results in increased GLP-1 secretion. We used a wide range of experimental techniques, including gene expression analysis, immunohistochemical approaches, and the perfused mouse intestine to characterize the paracrine circuit controlling GLP-1 and SS. We show that 1) antagonizing the SS receptor (SSTr) 2 and SSTr5 led to increased GLP-1 and SS secretion in the mouse, 2) SS exhibits strong tonic inhibition of GLP-1 secretion preferentially through SSTr5, and 3) the secretion of S was GLP-1 receptor dependent. We conclude that SS is a tonic inhibitor of GLP-1 secretion, and interventions in the somatostain-GLP-1 paracrine loop lead to increased GLP-1 secretion. |
