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Banerjee, K.K., Deshpande, R.S., Koppula, P., Ayyub, C., Kolthur-Seetharam, U. (2017). Central metabolic sensing remotely controls nutrient-sensitive endocrine response in Drosophila via Sir2/Sirt1-upd2-IIS axis.  J. Exp. Biol. 220(7): 1187--1191.
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FBrf0235115
Publication Type
Research paper
Abstract

Endocrine signaling is central in coupling organismal nutrient status with maintenance of systemic metabolic homeostasis. While local nutrient sensing within the insulinogenic tissue is well studied, distant mechanisms that relay organismal nutrient status in controlling metabolic-endocrine signaling are less well understood. Here, we report a novel mechanism underlying the distant regulation of the metabolic endocrine response in Drosophila melanogaster We show that the communication between the fat body and insulin-producing cells (IPCs), important for the secretion of Drosophila insulin-like peptides (dILPs), is regulated by the master metabolic sensor Sir2/Sirt1. This communication involves a fat body-specific direct regulation of the JAK/STAT cytokine upd2 by Sir2/Sirt1. We have also uncovered the importance of this regulation in coupling nutrient inputs with dILP secretion, and distantly controlling insulin/IGF signaling (IIS) in the intestine. Our results provide fundamental mechanistic insights into the top-down control involving tissues that play key roles in metabolic sensing, endocrine signaling and nutrient uptake.

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    Language of Publication
    English
    Additional Languages of Abstract
    Parent Publication
    Publication Type
    Journal
    Abbreviation
    J. Exp. Biol.
    Title
    Journal of Experimental Biology
    Publication Year
    1930-
    ISBN/ISSN
    0022-0949
    Data From Reference
    Alleles (6)
    Genes (6)
    Insertions (1)