title: Interleukin-1beta affects calcium signaling and in vitro cell migration of astrocyte progenitors.
abstract: Spontaneous calcium activity of neural progenitors is largely dependent on a paracrine signaling mechanism involving release of ATP and activation of purinergic receptors. Although it is well documented that, in mature astrocytes, cytokines modulate the expression levels of certain purinergic receptors, nothing is known about their impact during early stages of development. Here we provide evidence that conditioned medium from activated microglia and interleukin-1beta, but not tumor necrosis factor-alpha, decrease the frequency of calcium oscillations and reduce the rate of in vitro migration of astrocyte progenitors. Such alterations were due to changes in activity of two purinergic P2 receptors, and not to the amount of released ATP. These results indicate that interleukin-1beta plays an important role during early stages of CNS development, modulating calcium signaling and cell migration.
authors.affiliation: The Dominick P. Purpura Department of Neuroscience, Albert Einstein College of Medicine, Bronx, NY 10461, USA.
authors.forename: Katharine
authors.initials: K
authors.lastname: Striedinger
authors.forename: Eliana
authors.initials: E
authors.lastname: Scemes
mesh_terms: D000255:Adenosine Triphosphate / Q000031:analogs & derivatives / Q000378:metabolism / Q000494:pharmacology; D000704:Analysis of Variance; D000818:Animals; D001253:Astrocytes / Q000187:drug effects*; D002118:Calcium / Q000378:metabolism; D020013:Calcium Signaling / Q000187:drug effects*; D002454:Cell Differentiation / Q000187:drug effects; D002465:Cell Movement / Q000187:drug effects*; D002478:Cells, Cultured; D017077:Culture Media, Conditioned / Q000494:pharmacology; D004305:Dose-Response Relationship, Drug; D004622:Embryo, Mammalian; D005260:Female; D053583:Interleukin-1beta / Q000494:pharmacology*; D051379:Mice; D008810:Mice, Inbred C57BL; D009474:Neurons / Q000737:chemistry; D011247:Pregnancy; D013234:Stem Cells / Q000187:drug effects*; D013873:Thionucleotides / Q000494:pharmacology
chemical_list: D017077:Culture Media, Conditioned; D053583:Interleukin-1beta; D013873:Thionucleotides; D000255:Adenosine Triphosphate; D002118:Calcium; C008501:2-methylthio-ATP