The human CC chemokine I-309 is a potent monocyte chemoattractant and inhibits apoptosis in thymic cell lines. Here, we identify a specific human I-309 receptor, and name it CCR8 according to an accepted nomenclature system. The receptor has seven predicted transmembrane domains, is expressed constitutively in monocytes and thymus, and is encoded by a previously reported gene of previously unknown function named, alternatively, CY6, TER1, and CKR-L1. After transfection with the CY6 open reading frame, a mouse pre–B cell line exhibited calcium flux and chemotaxis in response to I-309 (EC50 = 2 nM for each), whereas 20 other chemokines were inactive. Signaling was sensitive to pertussis toxin, suggesting coupling to a Gi-type G protein. These properties parallel those of endogenous I-309 receptors expressed in an HL-60 clone 15 cell line model. The apparent monogamous relationship between I-309 and CCR8 is unusual among known CC chemokines and known CC chemokine receptors. CCR8 may regulate monocyte chemotaxis and thymic cell line apoptosis.
Identification of CCR8: A Human Monocyte and Thymus Receptor for the CC Chemokine I-309
M. Locati is a recipient of a fellowship from the Italian Association for Cancer Research.
Address corespondence to Philip M. Murphy, M.D., Building 10, Room 11N113, National Institutes of Health, Bethesda, MD 20892. Phone: 301-496-2877; FAX: 301-402-4369; E-mail: [email protected]; or Tom I. Bonner, Ph.D. Building 36, Room 7A07, National Institutes of Health, Bethesda, MD 20892. Phone: 301-496-8906; FAX: 301-402-1748; E-mail: [email protected]
H. Lee Tiffany, Laura L. Lautens, Ji-Liang Gao, James Pease, Massimo Locati, Christophe Combadiere, William Modi, Tom I. Bonner, Philip M. Murphy; Identification of CCR8: A Human Monocyte and Thymus Receptor for the CC Chemokine I-309. J Exp Med 7 July 1997; 186 (1): 165–170. doi: https://doi.org/10.1084/jem.186.1.165
Download citation file:
Sign in
Client Account
Sign in via your Institution
Sign in via your InstitutionSuggested Content
Email alerts
Advertisement