Fiche publication
Date publication
juillet 2007
Auteurs
Membres identifiés du Cancéropôle Est :
Dr BAGNARD Dominique
Tous les auteurs :
Gonthier B, Nasarre C, Roth L, Perraut M, Thomasset N, Roussel G, Aunis D, Bagnard D
Lien Pubmed
Résumé
In the developing cortex, axons and dendrites extend progressively in response to environmental cues attracting or repelling growing processes. Recent evidence suggests the existence of a functional link between guidance molecules and metalloproteinases. Here, we analyzed the putative functional interaction of matrix metalloproteinases (MMPs) with guidance cues of the semaphorin family during growth and guidance of cortical axons. Our results demonstrate that the expression pattern and the proteolytic activity of MMP-3 are consistent with a role of this particular MMP during cortical axon outgrowth. We found that MMP-3 is required for an optimal axon extension and is involved in the Sema3C-dependent chemoattraction of cortical axons by modulating both the growth capacity and the orientation of growth. Interestingly, the inhibitory Sema3A decreased both the expression and activity of MMP-3. Taken together, our results reveal a molecular interaction between MMPs and semaphorins providing new insight into the molecular mechanism allowing axonal growth cone to respond to environmental guidance cues in the context of cortical development.
Référence
Cereb Cortex. 2007 Jul;17(7):1712-21
