Absence of Interactive Effects of trans-1,2-Cyclohexanediol,a Major Metabolite of the Side-Chain of Candesartan Cilexetil,on Digoxin-Induced Arrhythmias in Dogs
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概要
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trans-1,2-Cyclohexanediol, the major metabolite of the cilexetil moiety of candesartan cilexetil (CC), has been reported to have potent pro-arrhythmic effects in dogs with congestive heart failure (CHF), especially when co-administered with digoxin. To verify this and to clarify the clinical relevance and the underlying mechanisms, a series of in vivo and in vitro experiments was conducted. When CC up to 300 mg/kg was administered orally to intact dogs, no changes in the electrocardiograms (ECG) or the required cumulative doses of ouabain to induce ventricular arrhythmias were observed. In dogs with CHF, intravenous bolus administration of trans-1,2-cyclohexanediol at 4 mg/kg followed by continuous infusion at 0.1 mg·kg−1·min−1 had no effects on the ECG parameters, the type, incidence, and onset time of digoxin-induced arrhythmias or the metabolism of digoxin. In an in vitro experiment using isolated guinea pig papillary muscle, trans-1,2-cyclohexanediol (1 – 100 μmol/L) showed no effects on any parameter of the action potentials. Because no effects were observed in these experiments where the exposure levels of trans-1,2-cyclohexanediol were extremely high compared to those in humans given the maximum therapeutic dose of CC, it is unlikely that CC would induce arrhythmias in clinical use even in patients treated with cardiac glycosides.
- 社団法人 日本薬理学会の論文
- 2003-08-01
著者
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CHATANI Fumio
Drug Safety Research Laboratories, Hikari Branch, Pharmaceutical Development Division, Takeda Chemic
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Watanabe Toshifumi
Product Planning & Management Takeda Chemical Industries Ltd.
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YAMAMOTO Keiji
Drug Safety Research Center, Takeda Chemical Industries, Ltd.
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KITAYOSHI Takahito
Pharmacology Research Laboratories I, Takeda Chemical Industries, Ltd.
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NISHIMURA Satoshi
Pharmacology Research Laboratories I, Takeda Chemical Industries, Ltd.
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Kitayoshi Takahito
Pharmacology Research Laboratories I Takeda Chemical Industries Ltd.
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Kitayoshi Takahito
Pharmaceutical Research Laboratories Ii Takeda Chemical Indutries
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Chatani Fumio
Drug Safety Research Center Takeda Chemical Industries Ltd.
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Nishimura Satoshi
Pharmacology Research Laboratories I Takeda Chemical Industries Ltd.
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Yamamoto Keiji
Drug Safety Research Center Takeda Chemical Industries Ltd.
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Yamamoto Keiji
Drug Delivery System Institute Ltd. :(present Address)discovery Research Laboratory Ajinomoto Co. In
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Nishimura Satoshi
Pharmaceutical Research Division, Takeda Pharmaceutical Co., Ltd.
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