Ameliorative Effects of Paeoniflorin, a Major Constituent of Peony Root, on Adenosine A_1 Receptor-Mediated Impairment of Passive Avoidance Performance and Long-Term Potentiation in the Hippocampus
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概要
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We examined the effects of paeoniflorin on adenosine A_1 receptor-mediated memory disturbance in the mouse passive avoidance test and inhibition of long-term potentiation (LTP) in the rat hippocampal CAI region. The pretraining administration of the selective adenosine A_1 receptor agonist N^6-cyclopentyladenosine (CPA) significantly impaired the retention performance determined 24h after the training test. The intraperitoneal injections of paeoniflorin and the adenosine A_1 receptor antagonist 1, 3-dipropyl-8-cyclopentylxanthine (DPCPX) significantly attenuated the deficit in retention performance caused by CPA. The in vitro studies revealed that adenosine (1 and 10μM) dose dependently reduced both the population spike (PS) amplitudes and the tetanic stimulation-induced LTP in the hippocampus. DPCPX, at the concentration (0.1μM) that had no effect on PS amplitudes or LTP induction, significantly reversed the suppressive effects of adenosine on both indices. Paeoniflorin also does dependently reversed 10μM adenosine-induced suppression of LTP but had no effect on PS reduced by adenosine. These results suggest that paeoniflorin ameliorates memory disruption mediated by adenosine A_1 receptor and that modulation of adenosine-mediated inhibition of LTP in the hippocampus is implicated in its beneficial effect on learning and memory impairment in rodents.
- 社団法人日本薬学会の論文
- 2001-05-01
著者
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Tohda Michihisa
富山医科薬科大学和漢薬研究所
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渡辺 裕司
International Research Center For Traditional Medicine Toyama Prefecture International Health Comple
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Watanabe Hiroshi
Department of Cardiology, Niigata City General Hospital
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Tabata Keiichi
Department Of Pharmacology Institute Of Natural Medicine Toyama Medical And Pharmaceutical Univerity
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Tabata Keiichi
富山医科薬科大学和漢薬研究所
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Tabata Keiichi
Department Of Pharmacology Faculty Of Pharmaceutical Sciences Science University Of Tokyo
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Tabata Keiichi
Department Of Pharmacology Institute Of Natural Medicine Toyama Medical And Pharmaceutical Universit
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MURAKAMI Yukihisa
Department of Pharmacology, Institute of Natural Medicine, Toyama Medical and Pharmaceutical Univers
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MATSUMOTO Kinzo
Department of Pharmacology, Institute of Natural Medicine, Toyama Medical and Pharmaceutical Univers
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Murakami Yukihisa
富山大学和漢医薬学総合研究所 複合薬物薬理学
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Mukarami Yukihisa
Institute Of Natural Medicine Toyama Medical And Pharmaceutical University
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Murakami Yukihisa
Division Of Medicinal Pharmacology Institute Of Natural Medicine Toyama Medical And Pharmaceutical U
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Murakami Yukihisa
Research Institute For Wakan-yaku (traditional Sino-japanese Medicines)
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Murakami Yukihisa
Department Of Pharmacology Institute Of Natural Medicine:21st Century Coe Program Toyama Medical And
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Murakami Yuko
Department Of Bioactive Molecules National Institute Of Infectious Diseases
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Matsumoto Kinzo
Div. Of Medicinal Pharmacology Inst. Of Natural Medicine Univ. Of Toyama
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Matsumoto Kinzo
Division Of Medicinal Pharmacology Institute Of Natural Medicine Toyama Medical And Pharmaceutical U
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Matsumoto Kinzo
Department Of Pharmacology Institute Of Natural Medicine:21st Century Coe Program Toyama Medical And
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Matsumoto K
Div. Of Medicinal Pharmacology Inst. Of Natural Medicine Univ. Of Toyama
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Matsumoto Kinzo
富山大学和漢医薬学総合研究所 複合薬物薬理学
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Murakami Y
Department Of Bioactive Molecules National Institute Of Infectious Diseases
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Murakami Y
Toho Univ. Chiba Jpn
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Watanabe Hiroshi
Department Of Applied Chemistry And Bioengineering Graduate School Of Engineering Osaka City Univers
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