A role for dendritic mGluR5-mediated local translation of Arc/Arg3.1 in MEF2-dependent synapse elimination.

A role for dendritic mGluR5-mediated local translation of Arc/Arg3.1 in MEF2-dependent synapse elimination.
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DOI:
10.1016/j.celrep.2014.04.035
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发表时间:
2014-06-12
期刊:
影响因子:
8.8
通讯作者:
Huber KM
Huber KM
中科院分区:
生物学1区
文献类型:
--
作者:
Wilkerson JR;Tsai NP;Maksimova MA;Wu H;Cabalo NP;Loerwald KW;Dictenberg JB;Gibson JR;Huber KM

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Experience refines synaptic connectivity through neural activity-dependent regulation of transcription factors. Although activity-dependent regulation of transcription factors has been well described, it is unknown if synaptic activity and local, dendritic regulation of the induced transcripts are necessary for mammalian synaptic plasticity in response to transcription factor activation. Neuronal depolarization activates the Myocyte Enhancer Factor 2 (MEF2) family of transcription factors which suppresses excitatory synapse number. We report that activation of metabotropic glutamate receptor 5 (mGluR5) on the dendrites, but not cell soma, of hippocampal CA1 neurons is required for MEF2-induced functional and structural synapse elimination. We present evidence that mGluR5 is necessary for synapse elimination to stimulate dendritic translation of the MEF2-target gene Arc/Arg3.1. Arc is required for MEF2-induced synapse elimination, where it plays an acute, cell autonomous and postsynaptic role. This work reveals a role for dendritic activity in local translation of specific transcripts in synapse refinement.
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