Molecular cloning and functional expression of a novel CC chemokine receptor cDNA from a human basophilic cell line - PubMed (original) (raw)
. 1995 Aug 18;270(33):19495-500.
doi: 10.1074/jbc.270.33.19495.
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- PMID: 7642634
- DOI: 10.1074/jbc.270.33.19495
Free article
Molecular cloning and functional expression of a novel CC chemokine receptor cDNA from a human basophilic cell line
C A Power et al. J Biol Chem. 1995.
Free article
Abstract
We report the cloning and characterization of a novel basophil CC chemokin receptor, K5-5, from the human immature basophilic cell line KU-812. The predicted protein sequence of K5-5 shows only 49% identity to the macrophage inflammatory protein-1 alpha/RANTES receptor (CC CKR-1) and 47% identity to monocyte chemotactic protein-1 receptor (b form), suggesting that this cDNA encodes a novel member of the CC chemokine receptor family. Analysis of K5-5 mRNA expression indicates that it is restricted to leukocyte-rich tissues. In addition, we have shown significant levels of K5-5 mRNA in human basophils, which were up-regulated by treatment with interleukin-5. The CC chemokines, Macrophage inflammatory protein-1 alpha, RANTES, and monocyte chemotactic protein-1 were able to stimulate a Ca(2+)-activated chloride channel in Xenopus laevis oocytes injected with K5-5 cRNA, whereas no signal was detected in response to monocyte chemotactic protein-2, macrophage inflammatory protein-1 beta, or the CXC chemokine, interleukin-8. Taken together, these results indicate for the first time the presence of a CC chemokine receptor on basophils, which functions as a "shared" CC chemokine receptor and may therefore be implicated in the pathogenesis of basophil-mediated allergic diseases.
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