title: T-588, a cognitive enhancer, stimulates in vivo phosphorylation of extracellular signal-regulated kinases in the hippocampus.
abstract: Administration of (1R)-1-benzo[b]thiophen-5-yl-2-[2-(diethylamino)ethoxy]ethan-1-ol hydrochloride (T-588), a cognitive enhancer, like the acetylcholine esterase inhibitors physostigmine and tacrine, stimulated phosphorylation of extracellular signal-regulated kinases (ERK) in the mouse hippocampus. The effect of T-588 on ERK phosphorylation was persistent from 2 to 6 h after injection. Immunohistochemical study showed that T-588 stimulated neuronal ERK phosphorylation in rat hippocampal CA1 pyramidal subfield. These findings suggest that systemic T-588 stimulates the ERK kinase pathway in the hippocampal neurons.
authors.affiliation: Laboratory of Medicinal Pharmacology, Graduate School of Pharmaceutical Sciences, Osaka University, Suita, Osaka 565-0871, Japan.
authors.forename: Ikuko
authors.initials: I
authors.lastname: Yokoyama
authors.forename: Yoshiyuki
authors.initials: Y
authors.lastname: Sakai
authors.forename: Yuki
authors.initials: Y
authors.lastname: Hatayama
authors.forename: Shingo
authors.initials: S
authors.lastname: Tsuji
authors.forename: Yutaka
authors.initials: Y
authors.lastname: Koyama
authors.forename: Akemichi
authors.initials: A
authors.lastname: Baba
authors.forename: Toshio
authors.initials: T
authors.lastname: Matsuda
mesh_terms: D000818:Animals; D004048:Diethylamines / Q000494:pharmacology*; D004305:Dose-Response Relationship, Drug; D006624:Hippocampus / Q000187:drug effects* / Q000201:enzymology; D008297:Male; D051379:Mice; D020928:Mitogen-Activated Protein Kinases / Q000378:metabolism*; D018697:Nootropic Agents / Q000494:pharmacology*; D010766:Phosphorylation / Q000187:drug effects; D051381:Rats; D017208:Rats, Wistar; D013876:Thiophenes / Q000494:pharmacology*
chemical_list: D004048:Diethylamines; D018697:Nootropic Agents; D013876:Thiophenes; C082372:T 588; D020928:Mitogen-Activated Protein Kinases