Novel adenosine and cAMP signalling pathways in migrating glial cells

Silvia Bernascone, Jessica Erriquez, Mario Ferraro, Armando A. Genazzani, Carla Distasi

Research output: Contribution to journalArticle

Abstract

This study was aimed at characterizing the effect of purinergic transmission on migration of embryonic ciliary ganglion satellite glial cells. Application of adenosine significantly decreased the rate of migration of glial cells whereas no differences were observed in the presence of ATP. The A2B receptor antagonist reverted this action, but application of an A2A receptor antagonist or a cAMP-protein kinase inhibitor had no effect on the agonist's stimulation. Forskolin, which stimulates adenylate cyclase activity, and the cAMP analogue 8-CPT-2'-O-Me-cAMP, which selectively activates the guanine exchange factor Epac1, mimicked the effect of adenosine.In addition, intracellular calcium measurements studies revealed that application of either adenosine or ATP induced an increase in [Ca2+]i and that the adenosine-induced [Ca2+]i response was due to Ca2+ entry and was blocked by an A2A receptor antagonist, SCH 58261, or by high Gd3+ concentrations. Furthermore, forskolin, but not 8-CPT-2'-O-Me-cAMP, activated the Ca2+ entry which was blocked by Gd3+ and was independent of cAMP-protein kinase activity.These results demonstrate the involvement of purinergic P1 signalling in the regulation of cellular migration, and point to the importance of adenosine as a negative modulator of migration of peripheral developing glial cells and as an activator of Ca2+ entry.

Original languageEnglish
Pages (from-to)83-90
Number of pages8
JournalCell Calcium
Volume48
Issue number1
DOIs
Publication statusPublished - Jul 2010

Keywords

  • Adenosine
  • Calcium
  • CAMP
  • Epac1
  • Migration
  • Satellite glial cells

ASJC Scopus subject areas

  • Cell Biology
  • Molecular Biology
  • Physiology

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