Mechanisms of internalization and recycling of the chemokine receptor, CCR5

Mueller, A. ORCID: and Strange, P. G. (2004) Mechanisms of internalization and recycling of the chemokine receptor, CCR5. European Journal of Biochemistry, 271 (2). pp. 243-252. ISSN 0014-2956

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CCR5 is a G protein-coupled receptor that binds several natural chemokines but it is also a coreceptor for the entry of M tropic strains of HIV-1 into cells. Levels of CCR5 on the cell surface are important for the rate of HIV-1 infection and are determined by a number of factors including the rates of CCR5 internalization and recycling. Here we investigated the involvement of the actin cytoskeleton in the control of ligand-induced internalization and recycling of CCR5. Cytochalasin D, an actin depolymerizing agent, inhibited chemokine-induced internalization of CCR5 and recycling of the receptor in stably transfected CHO cells and in the monocytic cell line, THP-1. CCR5 internalization and recycling were inhibited by Toxin B and C-3 exoenzyme treatment in CHO and THP-1 cells, confirming activation of members of the RhoGTPase family by CCR5. The specific Rho kinase inhibitor Y27632, however, had no effect on CCR5 internalization or recycling. Ligand-induced activation of CCR5 leads to Rho kinase-dependent formation of focal adhesion complexes. These data indicate that CCR5 internalization and recycling are regulated by actin polymerization and activation of small G proteins in a Rho-dependent manner.

Item Type: Article
Uncontrolled Keywords: sdg 3 - good health and well-being ,/dk/atira/pure/sustainabledevelopmentgoals/good_health_and_well_being
Faculty \ School: Faculty of Science > School of Pharmacy
UEA Research Groups: Faculty of Science > Research Groups > Pharmaceutical Cell Biology (former - to 2017)
Faculty of Science > Research Groups > Molecular and Tissue Pharmacology
Depositing User: Rachel Smith
Date Deposited: 31 May 2011 14:03
Last Modified: 24 Oct 2022 02:43
DOI: 10.1046/j.1432-1033.2003.03918.x

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