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Signaling from Glia and Cholinergic Neurons Controls Nutrient-Dependent Production of an Insulin-like Peptide for Drosophila Body Growth.

Abstract：

:The insulin-like peptide (ILP) family plays key biological roles in the control of body growth. Although the functions of ILPs are well understood, the mechanisms by which organisms sense their nutrient status and thereby control ILP production remain largely unknown. Here, we show that signaling relay and feedback mechanisms control the nutrient-dependent expression of Drosophila ILP5 (Dilp5). The expression of dilp5 in brain insulin-producing cells (IPCs) is negatively regulated by the transcription factor FoxO. Glia-derived Dilp6 remotely regulates the FoxO activity in IPCs, primarily through Jeb secreted by cholinergic neurons. Dilp6 production by surface glia is amplified by cellular response to circulating Dilps derived from IPCs, in concert with amino acid signals. The induction of dilp5 is critical for sustaining body growth under restricted food conditions. These results provide a molecular framework that explains how the production of an endocrine hormone in a specific tissue is coordinated with environmental conditions.

journal_name

Dev Cell

journal_title

Developmental cell

authors

Okamoto N,Nishimura T

doi

10.1016/j.devcel.2015.10.003

subject

Has Abstract

pub_date

2015-11-09 00:00:00

pages

295-310

issue

3

eissn

1534-5807

issn

1878-1551

pii

S1534-5807(15)00650-4

journal_volume

35

pub_type

杂志文章

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