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Hypervulnerability of the adolescent prefrontal cortex to nutritional stress via reelin deficiency.

Identifieur interne : 000A57 ( Main/Exploration ); précédent : 000A56; suivant : 000A58

Hypervulnerability of the adolescent prefrontal cortex to nutritional stress via reelin deficiency.

Auteurs : M A Labouesse [Suisse] ; O. Lassalle [France] ; J. Richetto [Suisse] ; J. Iafrati [France] ; U. Weber-Stadlbauer [Suisse] ; T. Notter [Suisse] ; T. Gschwind [Suisse] ; L. Pujadas [Espagne] ; E. Soriano [Espagne] ; A C Reichelt [Australie] ; C. Labouesse [Suisse] ; W. Langhans [Suisse] ; P. Chavis [France] ; U. Meyer [Suisse]

Source :

RBID : pubmed:27843148

Descripteurs français

English descriptors

Abstract

Overconsumption of high-fat diets (HFDs) can critically affect synaptic and cognitive functions within telencephalic structures such as the medial prefrontal cortex (mPFC). The underlying mechanisms, however, remain largely unknown. Here we show that adolescence is a sensitive period for the emergence of prefrontal cognitive deficits in response to HFD. We establish that the synaptic modulator reelin (RELN) is a critical mediator of this vulnerability because (1) periadolescent HFD (pHFD) selectively downregulates prefrontal RELN(+) cells and (2) augmenting mPFC RELN levels using transgenesis or prefrontal pharmacology prevents the pHFD-induced prefrontal cognitive deficits. We further identify N-methyl-d-aspartate-dependent long-term depression (NMDA-LTD) at prefrontal excitatory synapses as a synaptic signature of this association because pHFD abolishes NMDA-LTD, a function that is restored by RELN overexpression. We believe this study provides the first mechanistic insight into the vulnerability of the adolescent mPFC towards nutritional stress, such as HFDs. Our findings have primary relevance to obese individuals who are at an increased risk of developing neurological cognitive comorbidities, and may extend to multiple neuropsychiatric and neurological disorders in which RELN deficiency is a common feature.

DOI: 10.1038/mp.2016.193
PubMed: 27843148


Affiliations:


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Le document en format XML

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<term>Extracellular Matrix Proteins (metabolism)</term>
<term>Male</term>
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<term>Cortex préfrontal</term>
<term>Malnutrition</term>
<term>Molécules d'adhérence cellulaire neuronale</term>
<term>Protéines de la matrice extracellulaire</term>
<term>Protéines de tissu nerveux</term>
<term>Récepteurs du N-méthyl-D-aspartate</term>
<term>Serine endopeptidases</term>
<term>Synapses</term>
</keywords>
<keywords scheme="MESH" xml:lang="en">
<term>Animals</term>
<term>Male</term>
<term>Mice</term>
<term>Mice, Inbred C57BL</term>
<term>Mice, Transgenic</term>
<term>Neuronal Plasticity</term>
</keywords>
<keywords scheme="MESH" xml:lang="fr">
<term>Animaux</term>
<term>Mâle</term>
<term>Plasticité neuronale</term>
<term>Souris</term>
<term>Souris de lignée C57BL</term>
<term>Souris transgéniques</term>
</keywords>
</textClass>
</profileDesc>
</teiHeader>
<front>
<div type="abstract" xml:lang="en">Overconsumption of high-fat diets (HFDs) can critically affect synaptic and cognitive functions within telencephalic structures such as the medial prefrontal cortex (mPFC). The underlying mechanisms, however, remain largely unknown. Here we show that adolescence is a sensitive period for the emergence of prefrontal cognitive deficits in response to HFD. We establish that the synaptic modulator reelin (RELN) is a critical mediator of this vulnerability because (1) periadolescent HFD (pHFD) selectively downregulates prefrontal RELN(+) cells and (2) augmenting mPFC RELN levels using transgenesis or prefrontal pharmacology prevents the pHFD-induced prefrontal cognitive deficits. We further identify N-methyl-d-aspartate-dependent long-term depression (NMDA-LTD) at prefrontal excitatory synapses as a synaptic signature of this association because pHFD abolishes NMDA-LTD, a function that is restored by RELN overexpression. We believe this study provides the first mechanistic insight into the vulnerability of the adolescent mPFC towards nutritional stress, such as HFDs. Our findings have primary relevance to obese individuals who are at an increased risk of developing neurological cognitive comorbidities, and may extend to multiple neuropsychiatric and neurological disorders in which RELN deficiency is a common feature.</div>
</front>
</TEI>
<affiliations>
<list>
<country>
<li>Australie</li>
<li>Espagne</li>
<li>France</li>
<li>Suisse</li>
</country>
<region>
<li>Canton de Vaud</li>
<li>Canton de Zurich</li>
<li>Catalogne</li>
<li>Provence-Alpes-Côte d'Azur</li>
</region>
<settlement>
<li>Barcelone</li>
<li>Lausanne</li>
<li>Marseille</li>
<li>Zurich</li>
</settlement>
<orgName>
<li>Université d'Aix-Marseille</li>
<li>Université de Zurich</li>
</orgName>
</list>
<tree>
<country name="Suisse">
<noRegion>
<name sortKey="Labouesse, M A" sort="Labouesse, M A" uniqKey="Labouesse M" first="M A" last="Labouesse">M A Labouesse</name>
</noRegion>
<name sortKey="Gschwind, T" sort="Gschwind, T" uniqKey="Gschwind T" first="T" last="Gschwind">T. Gschwind</name>
<name sortKey="Labouesse, C" sort="Labouesse, C" uniqKey="Labouesse C" first="C" last="Labouesse">C. Labouesse</name>
<name sortKey="Langhans, W" sort="Langhans, W" uniqKey="Langhans W" first="W" last="Langhans">W. Langhans</name>
<name sortKey="Meyer, U" sort="Meyer, U" uniqKey="Meyer U" first="U" last="Meyer">U. Meyer</name>
<name sortKey="Notter, T" sort="Notter, T" uniqKey="Notter T" first="T" last="Notter">T. Notter</name>
<name sortKey="Richetto, J" sort="Richetto, J" uniqKey="Richetto J" first="J" last="Richetto">J. Richetto</name>
<name sortKey="Weber Stadlbauer, U" sort="Weber Stadlbauer, U" uniqKey="Weber Stadlbauer U" first="U" last="Weber-Stadlbauer">U. Weber-Stadlbauer</name>
</country>
<country name="France">
<region name="Provence-Alpes-Côte d'Azur">
<name sortKey="Lassalle, O" sort="Lassalle, O" uniqKey="Lassalle O" first="O" last="Lassalle">O. Lassalle</name>
</region>
<name sortKey="Chavis, P" sort="Chavis, P" uniqKey="Chavis P" first="P" last="Chavis">P. Chavis</name>
<name sortKey="Iafrati, J" sort="Iafrati, J" uniqKey="Iafrati J" first="J" last="Iafrati">J. Iafrati</name>
</country>
<country name="Espagne">
<region name="Catalogne">
<name sortKey="Pujadas, L" sort="Pujadas, L" uniqKey="Pujadas L" first="L" last="Pujadas">L. Pujadas</name>
</region>
<name sortKey="Soriano, E" sort="Soriano, E" uniqKey="Soriano E" first="E" last="Soriano">E. Soriano</name>
</country>
<country name="Australie">
<noRegion>
<name sortKey="Reichelt, A C" sort="Reichelt, A C" uniqKey="Reichelt A" first="A C" last="Reichelt">A C Reichelt</name>
</noRegion>
</country>
</tree>
</affiliations>
</record>

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