{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,3]],"date-time":"2026-10-03T09:41:08Z","timestamp":1791020468581,"version":"4.1.0"},"reference-count":46,"publisher":"Rockefeller University Press","issue":"6","content-domain":{"domain":["rupress.org"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2000,12,11]]},"abstract":"<jats:p>The chemokine receptor CCR5 is a cofactor for the entry of R5 tropic strains of human immunodeficiency viruses (HIV)-1 and -2 and simian immunodeficiency virus. Cells susceptible to infection by these viruses can be protected by treatment with the CCR5 ligands regulated on activation, normal T cell expressed and secreted (RANTES), MIP-1\u03b1, and MIP-1\u03b2. A major component of the mechanism through which chemokines protect cells from HIV infection is by inducing endocytosis of the chemokine receptor. Aminooxypentane (AOP)-RANTES, an NH2-terminal modified form of RANTES, is a potent inhibitor of infection by R5 HIV strains. AOP-RANTES efficiently downmodulates the cell surface expression of CCR5 and, in contrast with RANTES, appears to prevent recycling of CCR5 to the cell surface. Here, we investigate the cellular basis of this effect.<\/jats:p>\n               <jats:p>Using CHO cells expressing human CCR5, we show that both RANTES and AOP-RANTES induce rapid internalization of CCR5. In the absence of ligand, CCR5 shows constitutive turnover with a half-time of 6\u20139 h. Addition of RANTES or AOP-RANTES has little effect on the rate of CCR5 turnover. Immunofluorescence and immunoelectron microscopy show that most of the CCR5 internalized after RANTES or AOP-RANTES treatment accumulates in small membrane-bound vesicles and tubules clustered in the perinuclear region of the cell. Colocalization with transferrin receptors in the same clusters of vesicles indicates that CCR5 accumulates in recycling endosomes. After the removal of RANTES, internalized CCR5 recycles to the cell surface and is sensitive to further rounds of RANTES-induced endocytosis. In contrast, after the removal of AOP-RANTES, most CCR5 remains intracellular. We show that these CCR5 molecules do recycle to the cell surface, with kinetics equivalent to those of receptors in RANTES-treated cells. However, these recycled CCR5 molecules are rapidly reinternalized. Our results indicate that AOP-RANTES\u2013induced changes in CCR5 alter the steady-state distribution of the receptor and provide the first evidence for G protein\u2013coupled receptor trafficking through the recycling endosome compartment.<\/jats:p>","DOI":"10.1083\/jcb.151.6.1281","type":"journal-article","created":{"date-parts":[[2002,7,26]],"date-time":"2002-07-26T16:46:23Z","timestamp":1027701983000},"page":"1281-1294","update-policy":"https:\/\/doi.org\/10.1083\/jcb.crossmarkpolicy","source":"Crossref","is-referenced-by-count":156,"title":["Endocytosis and Recycling of the HIV Coreceptor Ccr5"],"prefix":"10.1083","volume":"151","author":[{"given":"Nathalie","family":"Signoret","sequence":"first","affiliation":[{"name":"aMedical Research Council Laboratory for Molecular Cell Biology and Department of Biochemistry, University College London, London WC1E 6BT, United Kingdom"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Annegret","family":"Pelchen-Matthews","sequence":"additional","affiliation":[{"name":"aMedical Research Council Laboratory for Molecular Cell Biology and Department of Biochemistry, University College London, London WC1E 6BT, United Kingdom"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Matthias","family":"Mack","sequence":"additional","affiliation":[{"name":"bMedizinische Poliklinik, Ludwig-Maximilians-University, D-80336 Munich, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Amanda E.I.","family":"Proudfoot","sequence":"additional","affiliation":[{"name":"cSerono Pharmaceuticals Research Institute, 1228 Plan-les-Ouates, Geneva, Switzerland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mark","family":"Marsh","sequence":"additional","affiliation":[{"name":"aMedical Research Council Laboratory for Molecular Cell Biology and Department of Biochemistry, University College London, London WC1E 6BT, United Kingdom"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"291","published-online":{"date-parts":[[2000,12,11]]},"reference":[{"key":"2023072902403659600_Agaceetal2000","doi-asserted-by":"crossref","first-page":"325","DOI":"10.1016\/S0960-9822(00)00380-8","article-title":"Constitutive expression of stromal derived factor-1 by mucosal epithelia and its role in HIV transmission and propagation","volume":"10","author":"Agace","year":"2000","journal-title":"Curr. 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