Status of ghrelin as an islet hormone and paracrine/autocrine regulator of insulin secretion.

Katsuya Dezaki, Toshihiko Yada

Peptides 2022 Feb

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Ghrelin is expressed in the pancreatic islet cells as well as the stomach. In the perfused pancreas and isolated islets, GHS-R antagonism, ghrelin immunoneutralization and ghrelin-knockout (Ghr-KO) all increase glucose-induced insulin release. Thus, pharmacological, immunological and genetic blockades of ghrelin in the pancreatic islets all markedly augment glucose-induced insulin release, showing that islet-derived ghrelin physiologically restricts insulin release in rodents. In this review, we focus on the current understanding of the following key questions: 1) from which islet cells ghrelin is released, 2) on which islet cells ghrelin acts, and 3) mechanisms by which the islet-derived ghrelin inhibits insulin secretion. Copyright © 2021 Elsevier Inc. All rights reserved.

Citation

Katsuya Dezaki, Toshihiko Yada. Status of ghrelin as an islet hormone and paracrine/autocrine regulator of insulin secretion. Peptides. 2022 Feb;148:170681