The Journal of Experimental Medicine
Janeway's Immunobiology 7th Edition
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J. Exp. Med., Volume 188, Number 3, August 3, 1998 609-614

HIV-specific T Cell Cytotoxicity Mediated by RANTES Via the Chemokine Receptor CCR3

By Fabienne Hadida,* Vincent Vieillard,Dagger Brigitte Autran,* Ian Clark-Lewis,§ Marco Baggiolini,parallel and Patrice Debré*

From the * Laboratoire d'Immunologie Cellulaire, Unité de Recherche Associée, Centre National de la Recherche Scientifique 625, Bâtiment Centre d'Études et de Recherches en Virologie et Immunologie, Hôpital Pitié-Salpétrière, 75013 Paris, France; Dagger  UMR 146 Centre National de la Recherche Scientifique, Institut Curie, 91405 Orsay, France; the § Biomedical Research Centre, University of British Columbia, Vancouver, British Columbia, V6T 1Z3, Canada; and the parallel  Theodor Kocher Institute, University of Bern, CH-3000 Bern 9, Switzerland

CC chemokines produced by CD8+ T cells are known to act as HIV-suppressive factors. We studied the possible role of these chemokines in HIV-1-specific killing of target cells. We found that the activity of cytotoxic T lymphocytes (CTLs) in CTL lines or freshly isolated peripheral blood mononuclear cells from HIV-1-infected individuals is markedly enhanced by RANTES (regulated on activation, normal T cell expressed and secreted) and virtually abolished by an antibody neutralizing RANTES or the RANTES receptor antagonist RANTES(9-68). Lysis was mediated by CD8+ major histocompatibility complex class I-restricted T cells and was obtained with target cells expressing epitopes of the HIV-1LAI proteins Gag, Pol, Env, and Nef. The cytolytic activity observed in the presence or absence of added RANTES could be abolished by pretreatment of the CTLs with pertussis toxin, indicating that the effect is mediated by a G protein-coupled receptor. The chemokines monocyte chemotactic protein (MCP)-3, MCP-4, and eotaxin acted like RANTES, whereas macrophage inflammatory protein (MIP)-1alpha , MIP-1beta , MCP-1, and stromal cell-derived factor 1 were inactive, suggesting a role for the eotaxin receptor, CCR3, and ruling out the involvement of CCR1, CCR2, CCR5, and CXCR4. CTL activity was abrogated by an antibody that blocks CCR3, further indicating that specific lysis is triggered via this chemokine receptor. These observations reveal a novel mechanism for the induction of HIV-1-specific cytotoxicity that depends on RANTES acting via CCR3.

Key words: CD8+ T lymphocytes;  monocyte chemotactic protein 3;  monocyte chemotactic protein 4;  eotaxin;  RANTES antagonist


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