Journal of Leukocyte Biology
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(Journal of Leukocyte Biology. 2003;73:442-447.)
© 2003 by Society for Leukocyte Biology

Involvement of P2Y receptors in the differentiation of haematopoietic cells

Katrin Sak*,{dagger}, Jean-Marie Boeynaems{dagger},{ddagger} and Hele Everaus*

* Hematology-Oncology Clinic, University of Tartu, Estonia;
{dagger} Institute of Interdisciplinary Research, School of Medicine, Université Libre de Bruxelles, Brussels, Belgium; and
{ddagger} Department of Medical Chemistry, Erasme Hospital, Brussels, Belgium

Correspondence: Katrin Sak, IRIBHM, 808, Route de Lennik, 1070 Brussels, Belgium. E-mail: Katrin.Sak{at}ulb.ac.be

The effects of extracellular nucleotides are mediated by multiple P2X ionotropic receptors and G protein-coupled P2Y receptors. These receptors are ubiquitous, but few physiological roles have been firmly identified. In this review article, we present a survey of the functional expression of P2Y receptors in the different haematopoietic lineages by analyzing the selectivity of these cells for the various adenine and uracil nucleotides as well as the second messenger signaling pathways involved. The pharmacological profiles of metabotropic nucleotide receptors are different among myeloid, megakaryoid, erythroid, and lymphoid cells and change during differentiation. A role of P2Y receptors in the differentiation and maturation of blood cells has been proposed: In particular the P2Y11receptor seems to be involved in the granulocytic differentiation of promyelocytes and in the maturation of monocyte-derived dendritic cells. It is suggested that the role of P2Y receptors in the maturation of blood cells may be more important than believed so far.

Key Words: purinoceptor • nucleotide • maturation of blood cell




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