Effects of BMY-21502 on Anoxia in Mice.
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概要
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The protective effects of BMY-21502 (1-[[1-[2-(trifluoromethyl)-4-pyrimidinyl]-4piperidinyl]methyl]-2-pyrrolidinone)against cerebral anoxia were investigated using various models in mice, in comparison with those of other cerebroactive drugs. Oral administration of BMY-21502 (10-100 mg/kg)significantly prolonged the survival time in KCN (2.4 mg/kg, i.v.)-induced anoxia. Oxiracetam and idebenone exerted similar but weak protection at doses above 100 mg/kg, p.o. and only at a dose of 100 mg/kg, p.o., respectively. Significant protection by BMY-21502 against moderate hypobaric hypoxia was observed at doses of 30 and 100 mg/kg, p.o. Idebenone (100 and 300 mg/kg, p.o.)significantly prolonged the survival time of mice in this model, but oxiracetam (30-300 mg/kg, p.o.)did not. Oral administration of all of these drugs (BMY-21502, 3 300 mg/kg; Oxiracetam, 100-1000 mg/kg; Idebenone, 100-1000 mg/kg)failed to increase the number of gasps and the duration of gasping in the decapitated head of mice as a complete ischemic model. The anti-anoxic effect of BMY-21502 in the KCN-anoxia model was blocked by pretreatment with scopolamine. These findings suggest that BMY-21502 has an anti-anoxic action superior to those of the other cerebroactive drugs used, and activation of the CNS cholinergic system is involved as one of the causative mechanisms for the anti-anoxic effect of BMY-21502.
著者
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Nabeshima Toshitaka
Department Of Chemical Pharmacology Faculty Of Pharmaceutical Sciences Meijo University
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AMANO MANABU
Department of Chemical Pharmacology and Department of Medicinal Chemistry, Faculty of Pharmaceutical
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Takahashi Norimitsu
Pharmacology Laboratory, Preclinical Research Laboratories, Bristol-Myers Squibb K.K.
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Goto Arata
Pharmacology Laboratory, Preclinical Research Laboratories, Bristol-Myers Squibb K.K.
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HASEGAWA Takaaki
Department of Bacteriology, Nagoya University School of Medicine
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