ERK is involved in the reorganization of ...
Type de document :
Article dans une revue scientifique: Article original
PMID :
URL permanente :
Titre :
ERK is involved in the reorganization of somatosensory cortical maps in adult rats submitted to hindlimb unloading.
Auteur(s) :
Dupont, Erwan [Auteur]
Stevens, Laurence [Auteur]
Cochon, Laetitia [Auteur]
Falempin, Maurice [Auteur]
Bastide, Bruno [Auteur]
Canu, Marie-Hélène [Auteur]
Stevens, Laurence [Auteur]
Cochon, Laetitia [Auteur]
Falempin, Maurice [Auteur]
Bastide, Bruno [Auteur]
Canu, Marie-Hélène [Auteur]
Titre de la revue :
PLoS ONE
Nom court de la revue :
PLoS One
Numéro :
6
Pagination :
e17564
Date de publication :
2011-03-08
ISSN :
1932-6203
Mot(s)-clé(s) en anglais :
Aging
Animals
Enzyme Activation
Flavonoids
Hindlimb Suspension
Male
Mitogen-Activated Protein Kinase 1
Mitogen-Activated Protein Kinase 3
Neuronal Plasticity
Phosphorylation
Rats
Rats, Wistar
Somatosensory Cortex
Time Factors
Up-Regulation
Animals
Enzyme Activation
Flavonoids
Hindlimb Suspension
Male
Mitogen-Activated Protein Kinase 1
Mitogen-Activated Protein Kinase 3
Neuronal Plasticity
Phosphorylation
Rats
Rats, Wistar
Somatosensory Cortex
Time Factors
Up-Regulation
Résumé en anglais : [en]
Sensorimotor restriction by a 14-day period of hindlimb unloading (HU) in the adult rat induces a reorganization of topographic maps and receptive fields. However, the underlying mechanisms are still unclear. Interest was ...
Lire la suite >Sensorimotor restriction by a 14-day period of hindlimb unloading (HU) in the adult rat induces a reorganization of topographic maps and receptive fields. However, the underlying mechanisms are still unclear. Interest was turned towards a possible implication of intracellular MAPK signaling pathway since Extracellular-signal-Regulated Kinase 1/2 (ERK1/2) is known to play a significant role in the control of synaptic plasticity. In order to better understand the mechanisms underlying cortical plasticity in adult rats submitted to a sensorimotor restriction, we analyzed the time-course of ERK1/2 activation by immunoblot and of cortical reorganization by electrophysiological recordings, on rats submitted to hindlimb unloading over four weeks. Immunohistochemistry analysis provided evidence that ERK1/2 phosphorylation was increased in layer III neurons of the somatosensory cortex. This increase was transient, and parallel to the changes in hindpaw cortical map area (layer IV). By contrast, receptive fields were progressively enlarged from 7 to 28 days of hindlimb unloading. To determine whether ERK1/2 was involved in cortical remapping, we administered a specific ERK1/2 inhibitor (PD-98059) through osmotic mini-pump in rats hindlimb unloaded for 14 days. Results demonstrate that focal inhibition of ERK1/2 pathway prevents cortical reorganization, but had no effect on receptive fields. These results suggest that ERK1/2 plays a role in the induction of cortical plasticity during hindlimb unloading.Lire moins >
Lire la suite >Sensorimotor restriction by a 14-day period of hindlimb unloading (HU) in the adult rat induces a reorganization of topographic maps and receptive fields. However, the underlying mechanisms are still unclear. Interest was turned towards a possible implication of intracellular MAPK signaling pathway since Extracellular-signal-Regulated Kinase 1/2 (ERK1/2) is known to play a significant role in the control of synaptic plasticity. In order to better understand the mechanisms underlying cortical plasticity in adult rats submitted to a sensorimotor restriction, we analyzed the time-course of ERK1/2 activation by immunoblot and of cortical reorganization by electrophysiological recordings, on rats submitted to hindlimb unloading over four weeks. Immunohistochemistry analysis provided evidence that ERK1/2 phosphorylation was increased in layer III neurons of the somatosensory cortex. This increase was transient, and parallel to the changes in hindpaw cortical map area (layer IV). By contrast, receptive fields were progressively enlarged from 7 to 28 days of hindlimb unloading. To determine whether ERK1/2 was involved in cortical remapping, we administered a specific ERK1/2 inhibitor (PD-98059) through osmotic mini-pump in rats hindlimb unloaded for 14 days. Results demonstrate that focal inhibition of ERK1/2 pathway prevents cortical reorganization, but had no effect on receptive fields. These results suggest that ERK1/2 plays a role in the induction of cortical plasticity during hindlimb unloading.Lire moins >
Comité de lecture :
Oui
Audience :
Non spécifiée
Établissement(s) :
Université de Lille
Univ. Artois
Univ. Littoral Côte d’Opale
Univ. Artois
Univ. Littoral Côte d’Opale
Équipe(s) de recherche :
Activité Physique, Muscle, Santé (APMS)
Date de dépôt :
2021-08-10T16:15:26Z
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- Dupont et al 2011.pdf
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