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Academic literature on the topic 'Récepteur métabotropique glutamatergique'
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Dissertations / Theses on the topic "Récepteur métabotropique glutamatergique"
Ramos, Cathy. "Etude du réceptosome du récepteur pré-synaptique métabotropique glutamatergique de type 4 (mGluR4) natif dans le cervelet de rat." Thesis, Paris 11, 2011. http://www.theses.fr/2011PA11T086.
Full textAt Purkinje Cell - Parallel Fiber synapses, mGluR4 receptors are the only glutamatergic metabotropic receptors of group III to modulate glutamatergic transmission by inhibiting calcium presynaptic influx controlling glutamate release. In heterologous systems, mGluR4 has been shown to activate G proteins of type Gi/o that would be negatively linked to adenylate cyclase (AC). In order to conserve most of physiological interactions, we first studied the receptosome of native mGluR4 in rat cerebellum. We identified 184 putative partners of the receptor. Moreover, in order to confirm these interactions, but also to find other partners, we decided to perform an independent and complementary approach of chromatography affinity. Numerous proteins have been found by this method, particularly proteins belonging to exocytosis and cellular trafficking families. Our results suggest that a partial control of neurotransmission could be due to interaction of mGluR4 with these kinds of proteins. On the other hand, biochemical approaches did not reveal interactions of mGluR4 with some proteins belonging to AC pathway, but with proteins of PLC/PKC pathway. These results are consistent with some functional studies of our lab and gave the way for elucidating the native molecular mechanisms of the cerebellar neurotransmission modulation by mGluR4
Peineau, Stéphane. "La somatostatine dans la modulation de la transmission synaptique glutamatergique : un inhibiteur dépendant de l'activité ?" Paris 6, 2002. http://www.theses.fr/2002PA066289.
Full textAbitbol, Karine. "Modulation de la transmission synaptique entre fibres parallèles et cellules de Purkinje du cervelt par des récepteurs présynaptiques métabotropiques glutamatergiques du groupe III." Paris 11, 2008. http://www.theses.fr/2008PA11T060.
Full textMoutin, Enora. "Organisation et dynamique des protéines d'échafaudage de la postsynapse glutamatergique : implications dans la physio-pathologie de la transmission synaptique." Thesis, Montpellier 2, 2011. http://www.theses.fr/2011MON20238/document.
Full textThe glutamatergic synapse is composed by an axonal presynapse and a postsynapse which is supported by a dendritic spine. The spine contains membrane glutamatergic receptors connected to sub-membrane scaffolding proteins. These postsynaptic density (PSD) proteins allow to link receptors to their signaling pathways. NMDA receptors are associated to metabotropic glutamate receptors (mGluR1/5) through the PSD95/GKAP/Shank/Homer protein complex. During my PhD, I have characterized protein-protein interactions dynamic in this complex and studied functional consequences on receptor activity.Homer is a multimeric protein linking mGluR5 to the PSD95/GKAP/Shank complex. The monomeric form Homer1a is unable to connect mGluR5 to Shank. We have shown that complex disruption by Homer1a expression induces a direct interaction between NMDA and mGluR5 and subsequent inhibition of NMDA currents. We have shown that this process occurs during synaptic potentiation.I have also studied the interaction between GKAP and DLC2, a light chain shared by molecular transporters. I have characterized the occurrence and dynamic of GKAP-DLC2 interaction and shown that neuronal activity increases this interaction leading to synaptic accumulation of GKAP. Moreover, this interaction allows PSD95 targeting into dendritic spines and NMDA currents increase. Together, these results show that scaffolding proteins participate to receptor signaling, modulate synaptic transmission and underlie long-term synaptic plasticity mechanisms
Cambonie, Gilles. "Contrôle glutamatergique de la production des radicaux libres oxygénés chez le rat nouveau-né : mécanismes et contribution à la pathologie développementales dans le système nerveux central." Montpellier 1, 2002. http://www.theses.fr/2002MON13512.
Full textGormley, Stéphanie. "Rôle du glutamate dans l'effet de l'amphétamine sur la récompense et l'activité locomotrice chez le rongeur." Thèse, 2006. http://hdl.handle.net/1866/15356.
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