UMMS Affiliation

Department of Psychiatry, Brudnick Neuropsychiatric Research Institute; Graduate School of Biomedical Sciences, Neuroscience Program

Publication Date

11-3-2015

Document Type

Article

Disciplines

Cell Biology | Molecular and Cellular Neuroscience

Abstract

Lateral diffusion in the membrane and endosomal trafficking both contribute to the addition and removal of AMPA receptors (AMPARs) at postsynaptic sites. However, the spatial coordination between these mechanisms has remained unclear, because little is known about the dynamics of AMPAR-containing endosomes. In addition, how the positioning of AMPAR-containing endosomes affects synapse organization and functioning has never been directly explored. Here, we used live-cell imaging in hippocampal neuron cultures to show that intracellular AMPARs are transported in Rab11-positive recycling endosomes, which frequently enter dendritic spines and depend on the microtubule and actin cytoskeleton. By using chemically induced dimerization systems to recruit kinesin (KIF1C) or myosin (MyosinV/VI) motors to Rab11-positive recycling endosomes, we controlled their trafficking and found that induced removal of recycling endosomes from spines decreases surface AMPAR expression and PSD-95 clusters at synapses. Our data suggest a mechanistic link between endosome positioning and postsynaptic structure and composition.

Keywords

AMPA receptors, KIF1C, actin, cytoskeleton, dendritic spine, intracellular transport, kinesin, microtubule, myosin, myosinV, myosinVI, synaptic plasticity

DOI of Published Version

10.1016/j.celrep.2015.09.062

Source

Cell Rep. 2015 Nov 3;13(5):933-43. doi: 10.1016/j.celrep.2015.09.062. Epub 2015 Oct 22. Link to article on publisher's site

Journal/Book/Conference Title

Cell reports

Comments

Co-author Sukhee Cho is a doctoral student in the Neuroscience Program in the Graduate School of Biomedical Sciences (GSBS) at UMass Medical School.

Related Resources

Link to Article in PubMed

PubMed ID

26565907

Creative Commons License

Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.

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