{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,24]],"date-time":"2026-09-24T12:36:39Z","timestamp":1790253399241,"version":"4.1.0"},"reference-count":50,"publisher":"American Physiological Society","issue":"1","funder":[{"DOI":"10.13039\/501100004359","name":"Vetenskapsr\u00e5det (Swedish Research Council)","doi-asserted-by":"publisher","id":[{"id":"10.13039\/501100004359","id-type":"DOI","asserted-by":"publisher"}]},{"name":"The Swedish Child Diabetes Fund"},{"name":"EXODIAB"},{"name":"the Swedish Diabetes Foundation"},{"name":"Diabetes Wellness Sweden"},{"DOI":"10.13039\/501100009708","name":"Novo Nordisk Foundation","doi-asserted-by":"crossref","id":[{"id":"10.13039\/501100009708","id-type":"DOI","asserted-by":"crossref"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["American Journal of Physiology-Endocrinology and Metabolism"],"published-print":{"date-parts":[[2019,7,1]]},"abstract":"<jats:p> The peptide ghrelin is mainly produced in some of the epithelial cells in the stomach, but also, during starvation, by the \u03b5-cells in the endocrine pancreas. Ghrelin, as an endogenous ligand for the growth hormone secretagogue receptor (GHS-R1\u03b1), exerts a variety of metabolic functions including stimulation of appetite and weight gain. Its complete role is not yet fully understood, including whether it has any vascular functions. The present study evaluated if ghrelin affects pancreatic and islet blood flow. Ghrelin and the GHS-R1\u03b1 receptor antagonist GHRP-6 were injected intravenously in rats followed by blood flow measurements using a microsphere technique. Ghrelin decreased, while GHRP-6 in fasted, but not fed, rats selectively increased islet blood flow fourfold. GHS-R1\u03b1 was identified not only on glucagon-producing cells but also seemed to be present in the islet arterioles. GHRP-6 in fasted rats, only, also improved the peak insulin response to glucose in vivo, thereby substantially blunting the hyperglycemia. GHRP-6 doubled glucose-stimulated insulin release in vitro of both islets obtained from fed and fasted rats. Our results indicate a novel role for endogenous ghrelin acting directly or indirectly as a local vasoconstrictor in the islets during fasting, thereby restricting the insulin response to hyperglycemia. This is to the best of our knowledge the first report that shows this physiological mechanism to restrict insulin delivery from the islets by acting on the vasculature; a mode of action that can be envisaged to complement the previously well-described mechanisms of ghrelin acting directly on the islet endocrine cells. <\/jats:p>","DOI":"10.1152\/ajpendo.00004.2019","type":"journal-article","created":{"date-parts":[[2019,5,7]],"date-time":"2019-05-07T15:22:12Z","timestamp":1557242532000},"page":"E139-E146","source":"Crossref","is-referenced-by-count":9,"title":["Ghrelin in rat pancreatic islets decreases islet blood flow"],"prefix":"10.1152","volume":"317","author":[{"given":"Carl Johan","family":"Drott","sequence":"first","affiliation":[{"name":"Department of Medical Cell Biology, Uppsala University, Uppsala, Sweden"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Petra","family":"Franz\u00e9n","sequence":"additional","affiliation":[{"name":"Department of Medical Cell Biology, Uppsala University, Uppsala, Sweden"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Per-Ola","family":"Carlsson","sequence":"additional","affiliation":[{"name":"Department of Medical Cell Biology, Uppsala University, Uppsala, Sweden"},{"name":"Department of Medical Sciences, Uppsala University, Uppsala, Sweden"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"24","reference":[{"key":"B1","doi-asserted-by":"publisher","DOI":"10.1007\/s00125-016-4033-1"},{"key":"B2","doi-asserted-by":"publisher","DOI":"10.3109\/13506129.2012.679988"},{"key":"B3","doi-asserted-by":"publisher","DOI":"10.1007\/s001250050880"},{"key":"B4","doi-asserted-by":"publisher","DOI":"10.1007\/s00125-003-1151-3"},{"key":"B5","doi-asserted-by":"publisher","DOI":"10.2337\/diab.46.6.947"},{"key":"B6","doi-asserted-by":"publisher","DOI":"10.1016\/j.febslet.2012.06.034"},{"key":"B7","doi-asserted-by":"publisher","DOI":"10.1210\/endo.141.11.7757"},{"key":"B8","doi-asserted-by":"publisher","DOI":"10.2337\/diabetes.51.1.124"},{"key":"B9","doi-asserted-by":"publisher","DOI":"10.2337\/db11-0368"},{"key":"B10","doi-asserted-by":"publisher","DOI":"10.2337\/db07-0345"},{"key":"B11","doi-asserted-by":"publisher","DOI":"10.2337\/db06-0878"},{"key":"B12","first-page":"388","volume":"62","author":"Dezaki K","year":"2004","journal-title":"Nihon Rinsho"},{"key":"B13","doi-asserted-by":"publisher","DOI":"10.1016\/j.molmet.2016.04.007"},{"key":"B14","doi-asserted-by":"publisher","DOI":"10.1530\/eje.0.1460241"},{"key":"B15","doi-asserted-by":"publisher","DOI":"10.1007\/s00125-011-2423-y"},{"key":"B16","doi-asserted-by":"publisher","DOI":"10.1152\/ajpendo.00219.2007"},{"key":"B17","doi-asserted-by":"publisher","DOI":"10.1210\/jcem.87.6.8739"},{"key":"B18","doi-asserted-by":"publisher","DOI":"10.1172\/JCI106307"},{"key":"B19","doi-asserted-by":"publisher","DOI":"10.2337\/db14-0432"},{"key":"B20","doi-asserted-by":"publisher","DOI":"10.1210\/en.2016-1393"},{"key":"B21","doi-asserted-by":"publisher","DOI":"10.1016\/B978-0-12-381272-8.00008-8"},{"key":"B22","doi-asserted-by":"publisher","DOI":"10.1126\/science.273.5277.974"},{"key":"B23","doi-asserted-by":"publisher","DOI":"10.1152\/ajpregu.2001.280.6.R1601"},{"key":"B24","doi-asserted-by":"publisher","DOI":"10.3109\/03009734.2016.1164769"},{"key":"B25","doi-asserted-by":"publisher","DOI":"10.1007\/BF00251896"},{"key":"B26","doi-asserted-by":"publisher","DOI":"10.3109\/03009739409179357"},{"key":"B27","doi-asserted-by":"publisher","DOI":"10.1007\/s00125-009-1485-6"},{"key":"B28","doi-asserted-by":"publisher","DOI":"10.1016\/j.regpep.2004.08.031"},{"key":"B29","doi-asserted-by":"publisher","DOI":"10.1007\/s00125-005-1761-z"},{"key":"B30","doi-asserted-by":"publisher","DOI":"10.1016\/j.cardiores.2005.09.001"},{"key":"B31","doi-asserted-by":"publisher","DOI":"10.1038\/45230"},{"key":"B32","doi-asserted-by":"publisher","DOI":"10.1038\/srep14041"},{"key":"B33","doi-asserted-by":"publisher","DOI":"10.2337\/db06-0623"},{"key":"B34","doi-asserted-by":"publisher","DOI":"10.1161\/01.HYP.0000122803.91559.55"},{"key":"B35","doi-asserted-by":"publisher","DOI":"10.1152\/ajpregu.2001.280.5.R1483"},{"key":"B36","doi-asserted-by":"publisher","DOI":"10.1038\/35051587"},{"key":"B37","doi-asserted-by":"publisher","DOI":"10.1016\/j.devcel.2006.01.015"},{"key":"B38","doi-asserted-by":"publisher","DOI":"10.2337\/db07-0724"},{"key":"B39","doi-asserted-by":"publisher","DOI":"10.2337\/db09-0877"},{"key":"B40","doi-asserted-by":"publisher","DOI":"10.1016\/j.regpep.2004.12.018"},{"key":"B41","doi-asserted-by":"publisher","DOI":"10.1210\/en.2002-220819"},{"key":"B42","doi-asserted-by":"publisher","DOI":"10.1016\/j.regpep.2003.12.001"},{"key":"B43","doi-asserted-by":"publisher","DOI":"10.1210\/endo-121-4-1424"},{"key":"B44","first-page":"75","volume":"163","author":"Sparrow RA","year":"1989","journal-title":"J Anat"},{"key":"B45","doi-asserted-by":"publisher","DOI":"10.1038\/35038090"},{"key":"B46","doi-asserted-by":"publisher","DOI":"10.1530\/JME-13-0122"},{"key":"B47","doi-asserted-by":"publisher","DOI":"10.1016\/S0167-0115(02)00067-8"},{"key":"B48","doi-asserted-by":"publisher","DOI":"10.1038\/sj.bjp.0704815"},{"key":"B49","doi-asserted-by":"publisher","DOI":"10.1210\/endo.141.11.7873"},{"key":"B50","doi-asserted-by":"publisher","DOI":"10.3748\/wjg.14.4795"}],"container-title":["American Journal of Physiology-Endocrinology and Metabolism"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.physiology.org\/doi\/pdf\/10.1152\/ajpendo.00004.2019","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2019,9,22]],"date-time":"2019-09-22T22:43:31Z","timestamp":1569192211000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.physiology.org\/doi\/10.1152\/ajpendo.00004.2019"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2019,7,1]]},"references-count":50,"journal-issue":{"issue":"1","published-print":{"date-parts":[[2019,7,1]]}},"alternative-id":["10.1152\/ajpendo.00004.2019"],"URL":"https:\/\/doi.org\/10.1152\/ajpendo.00004.2019","relation":{},"ISSN":["0193-1849","1522-1555"],"issn-type":[{"value":"0193-1849","type":"print"},{"value":"1522-1555","type":"electronic"}],"subject":[],"published":{"date-parts":[[2019,7,1]]}}}