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Clathrin-independent trafficking of AMPA receptors

Glebov, O. O., Tigaret, C. M. ORCID:, Mellor, J. R. and Henley, J. M. 2015. Clathrin-independent trafficking of AMPA receptors. Journal of Neuroscience 35 (12) , pp. 4830-4836. 10.1523/JNEUROSCI.3571-14.2015

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Membrane trafficking of AMPA receptors (AMPARs) is critical for neuronal function and plasticity. Although rapid forms of AMPAR internalization during long-term depression (LTD) require clathrin and dynamin, the mechanisms governing constitutive AMPAR turnover and internalization of AMPARs during slow homeostatic forms of synaptic plasticity remain unexplored. Here, we show that, in contrast to LTD, constitutive AMPAR internalization and homeostatic AMPAR downscaling in rat neurons do not require dynamin or clathrin function. Instead, constitutive AMPAR trafficking is blocked by a Rac1 inhibitor and is regulated by a dynamic nonstructural pool of F-actin. Our findings reveal a novel role for neuronal clathrin-independent endocytosis controlled by actin dynamics and suggest that the interplay between different modes of receptor endocytosis provides for segregation between distinct modes of neuronal plasticity.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Medicine
Publisher: Society for Neuroscience
ISSN: 0270-6474
Date of First Compliant Deposit: 14 January 2020
Date of Acceptance: 8 November 2014
Last Modified: 05 May 2023 22:09

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