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Related Collections Chemokines, Cytokines, and Interleukins Hemostasis, Thrombosis, and Vascular Biology Social Bookmarking                   What's this?  Previous Article  |  Table of Contents  |  Next Article  Blood, 1 January 2001, Vol. 97, No. 1, pp. 39-45 CHEMOKINES The chemokine receptor CCR8 mediates human endothelial cell chemotaxis induced by I-309 and Kaposi sarcoma herpesvirus-encoded vMIP-I and by lipoprotein(a)-stimulated endothelial cell conditioned medium Nasreen S. Haque, John T. Fallon, Mark B. Taubman, and Peter C. Harpel From the Department of Medicine, Divisions of Hematology and Cardiology, and the Department of Pathology, The Mount Sinai School of Medicine, New York, NY. The CC chemokine receptor 8 (CCR8) is expressed on monocytes and type 2 T lymphocytes. CCR8 is the sole receptor for the human CC chemokine I-309, as well as for viral monocyte inflammatory protein-I (vMIP-I), a human chemokine homologue induced in human cells by the Kaposi sarcoma-related human herpesvirus-8. Recently it was found that I-309 messenger RNA and protein are expressed by human umbilical vein endothelial cells (HUVECs) and that the secretion of endothelial I-309 is stimulated by apolipoprotein(a). I-309, vMIP-I, and the conditioned medium from apolipoprotein(a)-stimulated HUVECs induce endothelial chemotaxis. A polyclonal anti-CCR8 antibody and a newly developed murine monoclonal antibody against CCR8 inhibited this activity. The G-protein inhibitor pertussis toxin also inhibited endothelial chemotaxis, providing further evidence for a chemokine receptor-mediated effect. Endothelial cells contain CCR8 mRNA as shown by RNA blot analysis as well by direct sequence analysis. Immunohistochemical studies identified CCR8 and I-309 on the endothelium of human atherosclerotic plaques and in endothelial-derived spindle cells of Kaposi sarcoma. These results indicate that CCR8 is an endothelial receptor that may modulate endothelial function. © 2001 by The American Society of Hematology.   CiteULike    Connotea    Del.icio.us    Digg    Reddit    Technorati    What's this? This article has been cited by other articles: Y. B. Choi and J. Nicholas Autocrine and Paracrine Promotion of Cell Survival and Virus Replication by Human Herpesvirus 8 Chemokines J. Virol., July 1, 2008; 82(13): 6501 - 6513. [Abstract] [Full Text] [PDF] H. R. Luttichau, A. H. Johnsen, J. Jurlander, M. M. Rosenkilde, and T. W. Schwartz Kaposi Sarcoma-associated Herpes Virus Targets the Lymphotactin Receptor with Both a Broad Spectrum Antagonist vCCL2 and a Highly Selective and Potent Agonist vCCL3 J. Biol. Chem., June 15, 2007; 282(24): 17794 - 17805. [Abstract] [Full Text] [PDF] M. 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