A proteomic atlas of insulin signalling reveals tissue-specific mechanisms of longevity assurance

Luke S Tain; Robert Sehlke; Chirag Jain; Manopriya Chokkalingam; Nagarjuna Nagaraj; Paul Essers; Mark Rassner; Sebastian Grönke; Jenny Froelich; Christoph Dieterich; Matthias Mann; Nazif Alic; Andreas Beyer; Linda Partridge

A proteomic atlas of insulin signalling reveals tissue-specific mechanisms of longevity assurance

Luke S Tain, Robert Sehlke, Chirag Jain, Manopriya Chokkalingam, Nagarjuna Nagaraj, Paul Essers, Mark Rassner, Sebastian Grönke, Jenny Froelich, Christoph Dieterich, Matthias Mann, Nazif Alic, Andreas Beyer, Linda Partridge

22 Citationer (Scopus)

Abstract

Lowered activity of the insulin/IGF signalling (IIS) network can ameliorate the effects of ageing in laboratory animals and, possibly, humans. Although transcriptome remodelling in long-lived IIS mutants has been extensively documented, the causal mechanisms contributing to extended lifespan, particularly in specific tissues, remain unclear. We have characterized the proteomes of four key insulin-sensitive tissues in a long-lived Drosophila IIS mutant and control, and detected 44% of the predicted proteome (6,085 proteins). Expression of ribosome-associated proteins in the fat body was reduced in the mutant, with a corresponding, tissue-specific reduction in translation. Expression of mitochondrial electron transport chain proteins in fat body was increased, leading to increased respiration, which was necessary for IIS-mediated lifespan extension, and alone sufficient to mediate it. Proteasomal subunits showed altered expression in IIS mutant gut, and gut-specific over-expression of the RPN6 proteasomal subunit, was sufficient to increase proteasomal activity and extend lifespan, whilst inhibition of proteasome activity abolished IIS-mediated longevity. Our study thus uncovered strikingly tissue-specific responses of cellular processes to lowered IIS acting in concert to ameliorate ageing.

Originalsprog	Engelsk
Tidsskrift	Molecular Systems Biology
Vol/bind	13
Udgave nummer	9
Sider (fra-til)	939
ISSN	1744-4292
Status	Udgivet - 15 sep. 2017
Udgivet eksternt	Ja

Citationsformater

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abstract = "Lowered activity of the insulin/IGF signalling (IIS) network can ameliorate the effects of ageing in laboratory animals and, possibly, humans. Although transcriptome remodelling in long-lived IIS mutants has been extensively documented, the causal mechanisms contributing to extended lifespan, particularly in specific tissues, remain unclear. We have characterized the proteomes of four key insulin-sensitive tissues in a long-lived Drosophila IIS mutant and control, and detected 44% of the predicted proteome (6,085 proteins). Expression of ribosome-associated proteins in the fat body was reduced in the mutant, with a corresponding, tissue-specific reduction in translation. Expression of mitochondrial electron transport chain proteins in fat body was increased, leading to increased respiration, which was necessary for IIS-mediated lifespan extension, and alone sufficient to mediate it. Proteasomal subunits showed altered expression in IIS mutant gut, and gut-specific over-expression of the RPN6 proteasomal subunit, was sufficient to increase proteasomal activity and extend lifespan, whilst inhibition of proteasome activity abolished IIS-mediated longevity. Our study thus uncovered strikingly tissue-specific responses of cellular processes to lowered IIS acting in concert to ameliorate ageing.",

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AU - Tain, Luke S

AU - Sehlke, Robert

AU - Jain, Chirag

AU - Chokkalingam, Manopriya

AU - Nagaraj, Nagarjuna

AU - Essers, Paul

AU - Rassner, Mark

AU - Grönke, Sebastian

AU - Froelich, Jenny

AU - Dieterich, Christoph

AU - Mann, Matthias

AU - Alic, Nazif

AU - Beyer, Andreas

AU - Partridge, Linda

PY - 2017/9/15

Y1 - 2017/9/15

N2 - Lowered activity of the insulin/IGF signalling (IIS) network can ameliorate the effects of ageing in laboratory animals and, possibly, humans. Although transcriptome remodelling in long-lived IIS mutants has been extensively documented, the causal mechanisms contributing to extended lifespan, particularly in specific tissues, remain unclear. We have characterized the proteomes of four key insulin-sensitive tissues in a long-lived Drosophila IIS mutant and control, and detected 44% of the predicted proteome (6,085 proteins). Expression of ribosome-associated proteins in the fat body was reduced in the mutant, with a corresponding, tissue-specific reduction in translation. Expression of mitochondrial electron transport chain proteins in fat body was increased, leading to increased respiration, which was necessary for IIS-mediated lifespan extension, and alone sufficient to mediate it. Proteasomal subunits showed altered expression in IIS mutant gut, and gut-specific over-expression of the RPN6 proteasomal subunit, was sufficient to increase proteasomal activity and extend lifespan, whilst inhibition of proteasome activity abolished IIS-mediated longevity. Our study thus uncovered strikingly tissue-specific responses of cellular processes to lowered IIS acting in concert to ameliorate ageing.

AB - Lowered activity of the insulin/IGF signalling (IIS) network can ameliorate the effects of ageing in laboratory animals and, possibly, humans. Although transcriptome remodelling in long-lived IIS mutants has been extensively documented, the causal mechanisms contributing to extended lifespan, particularly in specific tissues, remain unclear. We have characterized the proteomes of four key insulin-sensitive tissues in a long-lived Drosophila IIS mutant and control, and detected 44% of the predicted proteome (6,085 proteins). Expression of ribosome-associated proteins in the fat body was reduced in the mutant, with a corresponding, tissue-specific reduction in translation. Expression of mitochondrial electron transport chain proteins in fat body was increased, leading to increased respiration, which was necessary for IIS-mediated lifespan extension, and alone sufficient to mediate it. Proteasomal subunits showed altered expression in IIS mutant gut, and gut-specific over-expression of the RPN6 proteasomal subunit, was sufficient to increase proteasomal activity and extend lifespan, whilst inhibition of proteasome activity abolished IIS-mediated longevity. Our study thus uncovered strikingly tissue-specific responses of cellular processes to lowered IIS acting in concert to ameliorate ageing.

KW - Journal Article

M3 - Journal article

C2 - 28916541

SN - 1744-4292

VL - 13

SP - 939

JO - Molecular Systems Biology

JF - Molecular Systems Biology

IS - 9

ER -

A proteomic atlas of insulin signalling reveals tissue-specific mechanisms of longevity assurance

Abstract

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