Drosophila insulin release is triggered by adipose Stunted ligand to brain Methuselah receptor

Renald Delanoue, Eleonora Meschi, Neha Agrawal, Alessandra Mauri, Yonit Tsatskis, Helen McNeill, Pierre Léopold

Research output: Contribution to journalArticlepeer-review

91 Scopus citations

Abstract

Animals adapt their growth rate and body size to available nutrients by a general modulation of insulin-insulin-like growth factor signaling. In Drosophila, dietary amino acids promote the release in the hemolymph of brain insulin-like peptides (Dilps), which in turn activate systemic organ growth. Dilp secretion by insulin-producing cells involves a relay through unknown cytokines produced by fat cells. Here, we identify Methuselah (Mth) as a secretin-incretin receptor subfamily member required in the insulin-producing cells for proper nutrient coupling. We further show, using genetic and ex vivo organ culture experiments, that the Mth ligand Stunted (Sun) is a circulating insulinotropic peptide produced by fat cells. Therefore, Sun and Mth define a new cross-organ circuitry that modulates physiological insulin levels in response to nutrients.

Original languageEnglish
Pages (from-to)1553-1556
Number of pages4
JournalScience
Volume353
Issue number6307
DOIs
StatePublished - Sep 30 2016

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