» Articles » PMID: 20516552

Effects of CC Chemokine Receptor 5 (CCR5) Inhibitors on the Dynamics of CCR5 and CC-chemokine-CCR5 Interactions

Overview
Journal Antivir Ther
Publisher Sage Publications
Date 2010 Jun 3
PMID 20516552
Citations 3
Authors
Affiliations
Soon will be listed here.
Abstract

Background: This study aimed to examine how CC chemokine receptor 5 (CCR5) inhibitors (aplaviroc [APL], TAK779 and maraviroc [MVC]) interact with CCR5 and affect its dynamics and physiological CC-chemokine-CCR5 interactions.

Methods: A yellow fluorescent protein (YFP)-tagged CCR5-expressing U373-MAGI cell line was generated and a stable CCR5-expressing clonal population, (YFP)CCR5-UM16, was prepared. (YFP)CCR5-UM16 cells were exposed to RANTES, macrophage inflammatory protein (MIP)-1alpha or MIP-1beta (all 100 ng/ml) with or without CCR5 inhibitors and (YFP)CCR5 internalization was visualized with real-time by laser scanning confocal microscopy. The mobility of (YFP)CCR5 was also examined in the presence of CCR5 inhibitors with fluorescence recovery after photobleaching (FRAP) imaging.

Results: Following the addition of each CC chemokine, intracellular fluorescence intensity increased whereas membranous fluorescence decreased, signifying (YFP)CCR5 internalization. All three CCR5 inhibitors failed to induce (YFP)CCR5 internalization. All three CCR5 inhibitors blocked the CC-chemokine-induced internalization at a high concentration of 1 microM; however, the ratio of APL concentration that blocked RANTES-induced internalization by 50% over APL concentration that blocked HIV type-1 (HIV-1) replication by 50% was 16.4, indicating that APL permits CC-chemokine-induced internalization to a much greater extent compared with TAK779 and MVC, having ratios of 1.1 and 0.9, respectively. The examination of (YFP)CCR5 mobility with FRAP imaging revealed that (YFP)CCR5 continuously underwent rapid redistribution, which none of the three inhibitors blocked.

Conclusions: The finding that APL moderately blocked the RANTES-triggered (YFP)CCR5 internalization despite the highly potent anti-HIV-1 activity of APL strongly suggests that development of CCR5 inhibitors, which do not overly inhibit physiological CC-chemokine-CCR5 interactions, is practically feasible.

Citing Articles

Activity and structural analysis of GRL-117C: a novel small molecule CCR5 inhibitor active against R5-tropic HIV-1s.

Nakata H, Maeda K, Das D, Chang S, Matsuda K, Venkateswara Rao K Sci Rep. 2019; 9(1):4828.

PMID: 30886166 PMC: 6423129. DOI: 10.1038/s41598-019-41080-w.


Immunological and pharmacological strategies to reactivate HIV-1 from latently infected cells: a possibility for HIV-1 paediatric patients?.

Martinez-Bonet M, Clemente M, Serramia M, Moreno S, Munoz E, Munoz-Fernandez M J Virus Erad. 2016; 1(3):148-52.

PMID: 27482406 PMC: 4946732.


The immunologic effects of maraviroc intensification in treated HIV-infected individuals with incomplete CD4+ T-cell recovery: a randomized trial.

Hunt P, Shulman N, Hayes T, Dahl V, Somsouk M, Funderburg N Blood. 2013; 121(23):4635-46.

PMID: 23589670 PMC: 3685899. DOI: 10.1182/blood-2012-06-436345.

References
1.
Makino Y, Cook D, Smithies O, Hwang O, Neilson E, Turka L . Impaired T cell function in RANTES-deficient mice. Clin Immunol. 2002; 102(3):302-9. DOI: 10.1006/clim.2001.5178. View

2.
Alkhatib G, Combadiere C, Broder C, Feng Y, Kennedy P, Murphy P . CC CKR5: a RANTES, MIP-1alpha, MIP-1beta receptor as a fusion cofactor for macrophage-tropic HIV-1. Science. 1996; 272(5270):1955-8. DOI: 10.1126/science.272.5270.1955. View

3.
Maeda K, Das D, Ogata-Aoki H, Nakata H, Miyakawa T, Tojo Y . Structural and molecular interactions of CCR5 inhibitors with CCR5. J Biol Chem. 2006; 281(18):12688-98. DOI: 10.1074/jbc.M512688200. View

4.
Baba M, Nishimura O, Kanzaki N, Okamoto M, Sawada H, Iizawa Y . A small-molecule, nonpeptide CCR5 antagonist with highly potent and selective anti-HIV-1 activity. Proc Natl Acad Sci U S A. 1999; 96(10):5698-703. PMC: 21923. DOI: 10.1073/pnas.96.10.5698. View

5.
Raport C, Gosling J, Schweickart V, Gray P, Charo I . Molecular cloning and functional characterization of a novel human CC chemokine receptor (CCR5) for RANTES, MIP-1beta, and MIP-1alpha. J Biol Chem. 1996; 271(29):17161-6. DOI: 10.1074/jbc.271.29.17161. View