Effect of TA-0910, a Novel Thyrotropin-Releasing Hormone Analog, on In Vivo Acetylcholine Release and Turnover in Rat Brain.
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- Kinoshita Kiyoshi
- Pharmaceutical Development Research Laboratory, Tanabe Seiyaku Co., Ltd.
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- Kawashima Kazutaka
- Analytical Laboratory, Tanabe Seiyaku Co., Ltd.
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- Kawashima Yumiko
- Lead Generation Research Laboratory, Tanabe Seiyaku Co., Ltd.
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- Fukuchi Isao
- Pharmaceutical Development Research Laboratory, Tanabe Seiyaku Co., Ltd.
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- Yamamura Michio
- Lead Optimization Research Laboratory, Tanabe Seiyaku Co., Ltd.
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- Matsuoka Yuzo
- Lead Optimization Research Laboratory, Tanabe Seiyaku Co., Ltd.
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抄録
To examine the action of a novel thyrotropin-releasing hormone (TRH) analog, TA-0910 ((−)-N-[(S)-hexahydro-l-methyl-2, 6-dioxo-4-pyrimidinylcarbonyl]-L histidyl-L prolinamide tetrahydrate), on the cerebral cholinergic systems, the release of acetylcholine (ACh) and choline in freely-moving rats and ACh accumulation in gamma-butyrolactone (GBL, a nerve impulse flow blocker) and physostigmine-treated rats were examined. TA-0910 (0.1—1 mg/kg, i.p.) caused a marked dose-dependent increase in extracellular ACh levels and a decrease in choline levels in the hippocampus of freely moving rats. These effects were significantly stronger and longer-lasting than similar effects of TRH. TA-0910 (1, 3 mg/kg, i.p.) depressed the ACh accumulation in the cerebral cortex and hippocampus of GBL (1000 mg/kg, i.p.)-treated rats. Moreover, this analog (1, 3 mg/kg, i.p.) increased the accumulation rate of ACh in these regions in physostigmine (1 mg/kg, i.p.)-treated rats. TRH (30 mg/kg, i.p.) affected the ACh accumulation only in the hippocampus of the GBL-treated rats. These results suggest that TA-0910 not only enhances the release of ACh, but also accelerates the ACh turnover, i.e., ACh release and synthesis, at the cholinergic neuronal terminals in normal rats.
収録刊行物
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- Jpn.J.Pharmacol.
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Jpn.J.Pharmacol. 71 (2), 139-145, 1996
公益社団法人 日本薬理学会
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詳細情報 詳細情報について
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- CRID
- 1390001204284492800
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- NII論文ID
- 10008188589
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- NII書誌ID
- AA00691188
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- COI
- 1:CAS:528:DyaK28XjvVWku78%3D
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- ISSN
- 13473506
- 00215198
- http://id.crossref.org/issn/00215198
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- PubMed
- 8835640
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- Crossref
- PubMed
- CiNii Articles
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- 使用不可