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Sam68 Enables Metabotropic Glutamate Receptor-Dependent LTD in Distal Dendritic Regions of CA1 Hippocampal Neurons.
- Source :
-
Cell reports [Cell Rep] 2019 Nov 12; Vol. 29 (7), pp. 1789-1799.e6. - Publication Year :
- 2019
-
Abstract
- The transport and translation of dendritic mRNAs by RNA-binding proteins (RBPs) allows for spatially restricted gene expression in neuronal processes. Although local translation in neuronal dendrites is now well documented, there is little evidence for corresponding effects on local synaptic function. Here, we report that the RBP Sam68 promotes the localization and translation of Arc mRNA preferentially in distal dendrites of rodent hippocampal CA1 pyramidal neurons. Consistent with Arc function in translation-dependent synaptic plasticity, we find that Sam68 knockout (KO) mice display impaired metabotropic glutamate-receptor-dependent long-term depression (mGluR-LTD) and impaired structural plasticity exclusively at distal Schaffer-collateral synapses. Moreover, by using quantitative proteomics, we find that the Sam68 interactome contains numerous regulators of mRNA translation and synaptic function. This work identifies an important player in Arc expression, provides a general framework for Sam68 regulation of protein synthesis, and uncovers a mechanism that enables the precise spatiotemporal expression of long-term plasticity throughout neurons.<br /> (Copyright © 2019 The Author(s). Published by Elsevier Inc. All rights reserved.)
- Subjects :
- Adaptor Proteins, Signal Transducing genetics
Animals
CA1 Region, Hippocampal cytology
Female
Mice
Mice, Knockout
Pyramidal Cells cytology
RNA-Binding Proteins genetics
Adaptor Proteins, Signal Transducing metabolism
CA1 Region, Hippocampal metabolism
Dendrites metabolism
Long-Term Synaptic Depression
Protein Biosynthesis
Pyramidal Cells metabolism
RNA-Binding Proteins metabolism
Subjects
Details
- Language :
- English
- ISSN :
- 2211-1247
- Volume :
- 29
- Issue :
- 7
- Database :
- MEDLINE
- Journal :
- Cell reports
- Publication Type :
- Academic Journal
- Accession number :
- 31722197
- Full Text :
- https://doi.org/10.1016/j.celrep.2019.10.030