title: Sphingosylphosphorylcholine increases calcium concentration in isolated brain nuclei.
abstract: Sphingosylphosphorylcholine (SPC) caused a rapid increase of Ca2+ concentration in isolated brain nuclei. This effect was prevented by nimodipine, an inhibitor of L-type Ca2+ channels, and by thapsigargin, an inhibitor of Ca(2+)-ATPase. Neither heparin nor U73122 modified this effect, suggesting that phospholipase C activation and inositol 1,4,5-trisphosphate (IP3) production are not involved. Results also indicated that SPC-induced increase in Ca2+ concentration is not protein kinase C-dependent.
authors.affiliation: Departamento de Biologia Molecular, Centro de Biologia Molecular Severo Ochoa (CSIC-UAM), Universidad Autónoma de Madrid, Spain.
authors.forename: M C
authors.initials: MC
authors.lastname: Calcerrada
authors.forename: B G
authors.initials: BG
authors.lastname: Miguel
authors.forename: R E
authors.initials: RE
authors.lastname: Catalan
authors.forename: A M
authors.initials: AM
authors.lastname: Martinez
mesh_terms: D000818:Animals; D001921:Brain / Q000187:drug effects / Q000378:metabolism*; D002118:Calcium / Q000378:metabolism*; D002121:Calcium Channel Blockers / Q000494:pharmacology; D000252:Calcium-Transporting ATPases / Q000037:antagonists & inhibitors; D002467:Cell Nucleus / Q000187:drug effects / Q000378:metabolism*; D004963:Estrenes / Q000494:pharmacology; D006493:Heparin / Q000494:pharmacology; D066298:In Vitro Techniques; D007700:Kinetics; D009553:Nimodipine / Q000494:pharmacology; D010767:Phosphorylcholine / Q000031:analogs & derivatives* / Q000494:pharmacology; D011760:Pyrrolidinones / Q000494:pharmacology; D051381:Rats; D013110:Sphingosine / Q000031:analogs & derivatives* / Q000494:pharmacology; D019284:Thapsigargin / Q000494:pharmacology; D010738:Type C Phospholipases / Q000037:antagonists & inhibitors
chemical_list: D002121:Calcium Channel Blockers; D004963:Estrenes; D011760:Pyrrolidinones; C005356:sphingosine phosphorylcholine; D010767:Phosphorylcholine; C060229:1-(6-((3-methoxyestra-1,3,5(10)-trien-17-yl)amino)hexyl)-1H-pyrrole-2,5-dione; D009553:Nimodipine; D019284:Thapsigargin; D006493:Heparin; D010738:Type C Phospholipases; D000252:Calcium-Transporting ATPases; D013110:Sphingosine; D002118:Calcium