Journal
BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS
Volume 307, Issue 4, Pages 797-802Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/S0006-291X(03)01266-X
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CRTH2, the second receptor for prostaglandin D-2 (PGD(2)), is thought to play a role in allergic inflammations through the induction of chemotactic migration and/or the activation of Th2, eosinophils, and basophils, in humans. We previously identified the mouse CRTH2 homolog of human CRTH2 and suggest that animal models would provide a clear understanding on the precise function of CRTH2 in allergic disorders. To this end we have confirmed that mouse CRTH2 is similar in gene structure to human CRTH2 and revealed that mouse CRTH2 is predominantly expressed in the eosinophils derived from IL-5-transgenic mice. Moreover, mouse CRTH2 harbors the ability to bind PGD(2) with high affinity and intracellular Ca2+ mobilization in a Gi-dependent manner and chemotactic responses in several transfected cell lines. The results demonstrated here indicate that mouse CRTH2 is the functional ortholog of human CRTH2 and paves the way for future analysis of the in vivo functions of CRTH2. (C) 2003 Elsevier Inc. All rights reserved.
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