mTORC1-dependent translation of collapsin response mediator protein-2 drives neuroadaptations underlying excessive alcohol-drinking behaviors

Mammalian target of rapamycin complex 1 (mTORC1) has an essential role in dendritic mRNA translation and participates in mechanisms underlying alcohol-drinking and reconsolidation of alcohol-related memories. Here, we report that excessive alcohol consumption increases the translation of downstream...

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Veröffentlicht in:Molecular psychiatry 2017-01, Vol.22 (1), p.89-101
Hauptverfasser: Liu, F, Laguesse, S, Legastelois, R, Morisot, N, Ben Hamida, S, Ron, D
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container_issue 1
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container_title Molecular psychiatry
container_volume 22
creator Liu, F
Laguesse, S
Legastelois, R
Morisot, N
Ben Hamida, S
Ron, D
description Mammalian target of rapamycin complex 1 (mTORC1) has an essential role in dendritic mRNA translation and participates in mechanisms underlying alcohol-drinking and reconsolidation of alcohol-related memories. Here, we report that excessive alcohol consumption increases the translation of downstream targets of mTORC1, including collapsin response mediator protein-2 ( CRMP-2 ), in the nucleus accumbens (NAc) of rodents. We show that alcohol-mediated induction of CRMP-2 translation is mTORC1-dependent, leading to increased CRMP-2 protein levels. Furthermore, we demonstrate that alcohol intake also blocks glycogen synthase kinase-3β (GSK-3β)-phosphorylation of CRMP-2, which results in elevated binding of CRMP-2 to microtubules and a concomitant increase in microtubule content. Finally, we show that systemic administration of the CRMP-2 inhibitor lacosamide, or knockdown of CRMP-2 in the NAc decreases excessive alcohol intake. These results suggest that CRMP-2 in the NAc is a convergent point that receives inputs from two signaling pathways, mTORC1 and GSK-3β, that in turn drives excessive alcohol-drinking behaviors.
doi_str_mv 10.1038/mp.2016.12
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Here, we report that excessive alcohol consumption increases the translation of downstream targets of mTORC1, including collapsin response mediator protein-2 ( CRMP-2 ), in the nucleus accumbens (NAc) of rodents. We show that alcohol-mediated induction of CRMP-2 translation is mTORC1-dependent, leading to increased CRMP-2 protein levels. Furthermore, we demonstrate that alcohol intake also blocks glycogen synthase kinase-3β (GSK-3β)-phosphorylation of CRMP-2, which results in elevated binding of CRMP-2 to microtubules and a concomitant increase in microtubule content. Finally, we show that systemic administration of the CRMP-2 inhibitor lacosamide, or knockdown of CRMP-2 in the NAc decreases excessive alcohol intake. These results suggest that CRMP-2 in the NAc is a convergent point that receives inputs from two signaling pathways, mTORC1 and GSK-3β, that in turn drives excessive alcohol-drinking behaviors.</abstract><cop>London</cop><pub>Nature Publishing Group UK</pub><pmid>26952865</pmid><doi>10.1038/mp.2016.12</doi><tpages>13</tpages><orcidid>https://orcid.org/0000-0001-9636-9432</orcidid><oa>free_for_read</oa></addata></record>
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subjects 13/89
14/1
14/19
38/89
38/90
631/378
64/60
692/699/476/5
82/29
96/1
Acetamides
Addictions
Alcohol Drinking
Alcohol Drinking - metabolism
Alcohol use
Animals
Behavioral Sciences
Biological Psychology
C57BL mouse
Cellular signal transduction
CRMP 2 gene
Dendrites
Dendrites - metabolism
Drinking (Alcoholic beverages)
Drinking water
Ethanol
Ethanol - metabolism
Genetic aspects
Genetic regulation
Glycogen Synthase Kinase 3
Glycogen Synthase Kinase 3 - metabolism
Glycogen Synthase Kinase 3 beta
Glycogen Synthase Kinase 3 beta - metabolism
Health aspects
Human health sciences
Humidity
Intercellular Signaling Peptides and Proteins
Intercellular Signaling Peptides and Proteins - metabolism
Intercellular Signaling Peptides and Proteins - physiology
Kinases
Laboratory animals
Lacosamide
Life Sciences
Long Evans rat
Male
Mechanistic Target of Rapamycin Complex 1
Medicine
Medicine & Public Health
Mice
Mice, Inbred C57BL
Microtubules
Multiprotein Complexes
Multiprotein Complexes - metabolism
Nerve Tissue Proteins
Nerve Tissue Proteins - metabolism
Nerve Tissue Proteins - physiology
Neurologie
Neurology
Neurosciences
Nucleus Accumbens
Nucleus Accumbens - metabolism
Original
original-article
Pharmacotherapy
Phosphorylation
Phosphotransferases
Protein Biosynthesis
Protein Biosynthesis - physiology
Proteins
Psychiatry
Psychological aspects
Rats
Rats, Long-Evans
RNA translation
Sciences de la santé humaine
Signal Transduction
TOR Serine-Threonine Kinases
TOR Serine-Threonine Kinases - metabolism
title mTORC1-dependent translation of collapsin response mediator protein-2 drives neuroadaptations underlying excessive alcohol-drinking behaviors
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