|
||
By


§
From the * Laboratory of Host Defenses, 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.
Laboratory of Cell Biology and § Section on Genetics,
the Krebs Institute, Department of Molecular
Biology and Biotechnology, University of Sheffield, Western Bank, Sheffield, S10 2TN, United
Kingdom; the ¶ Biological Carcinogenesis and Development Program, Program Resources,
Incorporated/Dyncorp, National Cancer Institute, Frederick Cancer Research and Development Center,
Frederick, Maryland 21702-1201
This article has been cited by other articles:
| TABLE OF CONTENTS |
|