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논문 기본 정보

자료유형
학술저널
저자정보
Eun Jae Soon (College of Pharmacy, Woosuk University) Cho Bok Hee (Department of Pharmacology, Chonbuk National University Medical School) Park Jeong Ah (Department of Pharmacology, Chonbuk National University Medical School) Lee Ggot Im (Department of Pharmacology, Chonbuk National University Medical School) Lee Taek Yul (College of Pharmacy, Woosuk University) Kim Dae Keun (College of Pharmacy, Woosuk University) Jung Young Hoon (College of Pharmacy, Woosuk University) Yoo Dong Jin (Department of Chemistry, Seonam University) Kwak Yong Geun (Department of Pharmacology, Chonbuk National University Medical School)
저널정보
대한약학회 Archives of pharmacal research : a publication of the Pharmaceutical Society of Korea Archives of pharmacal research : a publication of the Pharmaceutical Society of Korea 제28권 제3호
발행연도
2005.1
수록면
269 - 273 (5page)

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A furocoumarin derivative, psoralen (7H-furo[3,2-g][1]benzopyran-7-one), was isolated from the n-hexane fraction of Heracleum moellendorffii Hance. We examined the effects of psor-alen on a human Kv1.5 potassium channel (hKv1.5) cloned from human heart and stably expressed in Uk- cells. We found that psoralen inhibited the hKv1.5 current in a concentration-, use- and voltage-dependent manner with an IC$_{50}$ value of 180 $\pm$ 21 nM at +60 mV. Psoralen accelerated the inactivation kinetics of the hKv1.5 channel, and it slowed the deactivation kinetics of the hKv1.5 current resulting in a tail crossover phenomenon. These results indicate that psoralen acts on the hKv1.5 channel as an open channel blocker. Furthermore, psoralen prolonged the action potential duration of rat atrial muscles in a dose-dependent manner. Taken together, the present results strongly suggest that psoralen may be an ideal antiarrhythmic drug for atrial fibrillation.

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