Pharmacological study of TA-0910, a new thyrotropin-releasing hormone(TRH) analog. (IV). Effects on experimental memory impairment in mice and rats.
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概要
- 論文の詳細を見る
The effects of a new TRH analog, TA-0910, orally administered, on experimental memory impairments for the one-trial passive avoidance response in anoxic mice (light-dark box), active avoidance response in basal forebrain (BF)-lesioned rats (shuttle box), and delayed alternation task in scopolamine-treated rats (T-maze) were studied. In mice, TA-0910 (3-30 mg) administered 60 min before the retention trial dose-dependently prolonged the passive avoidance response latency reduced by CO<SUB>2</SUB>-exposure that was given immediately after the acquisition trial, but not when it was given 60 min before the acquisition or just after the anoxic treatment. In rats, TA-0910 (0.3-3 mg/kg) administered 40-60 min before the test trial, dose-dependently prevented the reduction in mean avoidance rate caused by BF-lesioning and elevated the scopolamine (0.1 mg/kg, i.p.)-induced reduction in percent correct choice level in the alternation task. TRH (30-300 mg/kg), on the other hand, produced no improvements in any of the above tests. These results suggest that TA-0910 improves impaired memory by correcting the retrieval process of memory.
- 公益社団法人 日本薬理学会の論文
著者
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Nakagawa Hiroyuki
Department Of Applied Chemistry School Of Science And Engineering Waseda University
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Ishida Ryuichi
Department Of Material-process Engineering And Applied Chemistry For Environment
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Kinoshita Kiyoshi
Department of Pharmacology, Kyoritsu College of Pharmacy
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YAMAMURA Michio
Department of Pharmacology, Safety Research Laboratory, Tanabe Seiyaku
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