Characteristics of the ATP-induced Ca2+-entry pathway in the t-BBEC 117 cell line derived from bovine brain endothelial cells.
ATP-receptor (P2Y) stimulation induced sustained Ca2+-entry, which was essential for the enhanced cell-proliferation in t-BBEC117, an immortalized cell-line derived from bovine brain endothelial cells. Application of Ca2+ following store-depletion with thapsigargin in Ca2+-free solution induced Ca2+-entry through store-operated channels (SOCs). Ca2+-entry induced by ATP or 1-oleoyl-2-acetyl-sn-glycerol (OAG) together with Ca2+ was significantly larger than that by Ca2+ alone, suggesting the involvement of receptor-operated channels (ROCs) in the Ca2+-entry. Results obtained using pharmacological tools suggest that the contribution of Ca2+ sources to ATP-induced [Ca2+]i rise in t-BBEC117 is estimated as approximately 2:1:2 for Ca2+-release and Ca2+-entry though SOCs and ROCs, respectively.
Yamazaki
Daiju
D
Department of Molecular & Cellular Pharmacology, Graduate School of Pharmaceutical Sciences, Nagoya City University, Japan.
Ohya
Susumu
S
Asai
Kiyofumi
K
Imaizumi
Yuji
Y
D000255:Adenosine Triphosphate / Q000494:pharmacology*; D000818:Animals; D001692:Biological Transport / Q000187:drug effects; D001812:Blood-Brain Barrier / Q000166:cytology / Q000187:drug effects / Q000378:metabolism; D001896:Boron Compounds / Q000494:pharmacology; D002118:Calcium / Q000378:metabolism* / Q000493:pharmacokinetics; D002417:Cattle; D002461:Cell Line, Transformed; D004075:Diglycerides / Q000494:pharmacology; D004305:Dose-Response Relationship, Drug; D042783:Endothelial Cells / Q000166:cytology / Q000187:drug effects* / Q000378:metabolism; D007093:Imidazoles / Q000494:pharmacology; D009532:Nickel / Q000494:pharmacology; D050052:TRPC Cation Channels / Q000037:antagonists & inhibitors / Q000502:physiology
D001896:Boron Compounds; D004075:Diglycerides; D007093:Imidazoles; D050052:TRPC Cation Channels; D009532:Nickel; C038237:1-oleoyl-2-acetylglycerol; D000255:Adenosine Triphosphate; C109986:2-aminoethoxydiphenyl borate; C063159:1-(2-(3-(4-methoxyphenyl)propoxy)-4-methoxyphenylethyl)-1H-imidazole; D002118:Calcium