Premium
Metabotropic P2 receptor activation regulates oligodendrocyte progenitor migration and development
Author(s) -
Agresti C.,
Meomartini M.E.,
Amadio S.,
Ambrosini E.,
Serafini B.,
Franchini L.,
Volonté C.,
Aloisi F.,
Visentin S.
Publication year - 2005
Publication title -
glia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.954
H-Index - 164
eISSN - 1098-1136
pISSN - 0894-1491
DOI - 10.1002/glia.20160
Subject(s) - p2y receptor , biology , oligodendrocyte , ionotropic effect , metabotropic receptor , microbiology and biotechnology , receptor , purinergic receptor , ppads , metabotropic glutamate receptor , agonist , endocrinology , medicine , biochemistry , glutamate receptor , central nervous system , myelin
To gain insights into the role of purinergic receptors in oligodendrocyte development, we characterized the expression and functional activity of P2 receptors in cultured rat oligodendrocyte progenitors and investigated the effects of ATP and its breakdown products on the migration and proliferation of this immature glial cell population. Using Western blot analysis, we show that oligodendrocyte progenitors express several P2X (P2X 1,2,3,4,7 ) and P2Y (P2Y 1,2,4 ) receptors. Intracellular Ca 2+ recording by Fura‐2 video imaging allowed to determine the rank potency order of the P2 agonists tested: ADPβS = ADP = Benzoyl ATP > ATP > ATPγS > UTP, α,β‐meATP ineffective. Based on the above findings, on pharmacological inhibition by the antagonists oxATP and MRS2179, and on the absence of α,βmeATP‐induced inward current in whole‐cell recording, P2X 7 and P2Y 1 were identified as the main ionotropic and metabotropic P2 receptors active in OPs. As a functional correlate of these findings, we show that ATP and, among metabotropic agonists, ADP and the P2Y 1 ‐specific agonist ADPβS, but not UTP, induce oligodendrocyte progenitor migration. Moreover, ATP and ADP inhibited the proliferation of oligodendrocyte progenitors induced by platelet‐derived growth factor, both in purified cultures and in cerebellar tissue slices. The effects of ATP and ADP on cell migration and proliferation were prevented by the P2Y 1 antagonist MRS2179. By confocal laser scanning microscopy, P2Y 1 receptors were localized in NG2‐labeled oligodendrocyte progenitors in the developing rat brain. These data indicate that ATP and ADP may regulate oligodendrocyte progenitor functions by a mechanism that involves mainly activation of P2Y 1 receptors. © 2005 Wiley‐Liss, Inc.