| First Author | Natalicchio A | Year | 2017 |
| Journal | Diabetes | Volume | 66 |
| Issue | 11 | Pages | 2849-2856 |
| PubMed ID | 28724742 | Mgi Jnum | J:245085 |
| Mgi Id | MGI:5915507 | Doi | 10.2337/db17-0002 |
| Citation | Natalicchio A, et al. (2017) The Myokine Irisin Is Released in Response to Saturated Fatty Acids and Promotes Pancreatic beta-Cell Survival and Insulin Secretion. Diabetes 66(11):2849-2856 |
| abstractText | This study explored the role of irisin as a new pancreatic beta-cell secretagogue and survival factor and its potential role in the communication between skeletal muscle and pancreatic beta-cells under lipotoxic conditions. Recombinant irisin stimulated insulin biosynthesis and glucose-stimulated insulin secretion (GSIS) in a PKA-dependent manner and prevented saturated fatty acid-induced apoptosis in human and rat pancreatic beta-cells, as well as in human and murine pancreatic islets, via AKT/BCL2 signaling. Treatment of myotubes with 0.5 mmol/L palmitate for 4 h, but not with oleate, promoted an increase in irisin release in the culture medium. Moreover, increased serum levels of irisin were observed in mice fed with a high-fat diet. Mouse serum rich in irisin and the conditioned medium from myotubes exposed to palmitate for 4 h significantly reduced apoptosis of murine pancreatic islets and insulin-secreting INS-1E cells, respectively, and this was abrogated in the presence of an irisin-neutralizing antibody. Finally, in vivo administration of irisin improved GSIS and increased beta-cell proliferation. In conclusion, irisin can promote beta-cell survival and enhance GSIS and may thus participate in the communication between skeletal muscle and beta-cells under conditions of excess saturated fatty acids. |
