Endothelium Dependent Vasorelaxant Action of ChungGongGo Extract on Arterial Contraction in Rabbit

청공고(淸空膏)의 내피세포 의존성 혈관이완효과

  • Oh, Chul (Department of Internal Medicine, College of Oriental Medicine, Semyung University) ;
  • Kim, Ho-Hyun (Department of Internal Medicine, College of Oriental Medicine, Semyung University) ;
  • Ko, Heung (Department of Internal Medicine, College of Oriental Medicine, Semyung University)
  • 오철 (세명대학교 한의과대학 내과학교실) ;
  • 김호현 (세명대학교 한의과대학 내과학교실) ;
  • 고흥 (세명대학교 한의과대학 내과학교실)
  • Published : 2008.06.25

Abstract

This study was undertaken to define the effect of ChungGongGo extract on norepinephrine-induced arterial contraction in rabbit. In order to investigate the effect of ChungGongGo extract on rabbit's contracted vascular ring detached from common carotid artery, vascular ring with intact or damaged endothelium was used for the experiment using organ bath. To analyze the mechanism of ChungGongGo extract-induced relaxation, ChungGongGo extract was infused into contracted vascular ring which had been pretreated by $N{\omega}$-nitro-L-arginine(L-NNA), Methylene blue(MB), and $Ca^{2+}$ was infused into contracted vascular ring induced by NE or KCl after treatment of ChungGongGo in $Ca^{2+}$-free solution. The results were as follows: ChungGongGo extract had an effective relaxation to the contracted vascular ring by NE in 1.0mg/ml and 0mg/ml level. ChungGongGo extract had an effective relaxation to the intact endothelium vascular ring, but when endothelium was removed, vascular ring did not relax. ChungGongGo extract-induced relaxation was inhibited by the pretreatment of L-NNA and MB. Pretreatment of ChungGongGo extract inhibit the contraction by influx of extra-$Ca^{2+}$ in contracted vascular ring induced by NE in $Ca^{2+}$-free solution. As mentioned above, we suggest that ChungGongGo relaxes vascular ring through suppress influx of extra-cellular $Ca^{2+}$ by the action of nitric oxide from endothelium.

Keywords

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