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The Journal of Internal Korean Medicine > Volume 24(2); 2003 > Article
The Journal of Internal Korean Medicine 2003;24(2): 220-232.
黃連解毒湯이 家의 血管緊張性調節에 미치는 影響
Effects of HwangRyunHaeDok-Tang and Constituent Herbs on a Contracted Artery of Rabbit
Oh-Yul Kwon, Chang-Gyu Nam, Ho-Hyun Kim, Chan-Gil Jeong, Hyun-Jea Sung
Department of Oriental Medicine Semyung University Graduate School
Correspondence  Oh-Yul Kwon ,Tel: 043-649-1901, Fax: 043-649-1382, 
Received: February 10, 2003,   Accepted: March 15, 2003,   Published online: June 30, 2003.
ABSTRACT
Objective :
The purpose of this study was to analyze the effects of HwangRyunHaeDok-Tang and combinations of constituent herbs on the arterial contraction.

Methods :
In order to investigate the effects Scutellariae Radix, Coptidis Rhizoma, Phellodendri Cortex and Gardeniae Fructus, in which one of them, two of them, and all of them, were used to exam.

Results:
The results were summarized as follows ; 1. HwangRyunHaeDok-Tang significantly inhibited the contraction of artery induced by Norepinephrine(NE). However the atonic effect was slightly blunted when the vascular endothelial cell was removed. No significant change in the atonic effect of HwangRyunHaeDok-Tang was found when L-NNA was used as a preliminary treatment. These results indicate that the vascular atonic effect by HwangRyunHaeDok-Tang is slightly dependent on the endothelial cell, and that the HwangRyunHaeDok-Tang works directly to the vascular smooth muscle in creating the vascular atonic effect. 2. The pretreatment of HwangRyunHaeDok-Tang extract significantly inhibited the contractile response to additive application of Ca2+ in the strips which were contracted by NE in Ca2+-free solution. 3. HwangRyunHaeDok-Tang extract increased the contraction of arterial smooth muscle induced by KCl. Therefore, it can be concluded that HwangRyunHaeDok-Tang may block the NE-receptor or receptor-operated Ca2+ channel. 4. It was determined that Scutellariae Radix, Coptidis Rhizoma and Phellodendri Cortex among the ingredients of HwangRyunHaeDok-Tang have a vascular atonic effect. In addition, those ingredients plays a role in strengthening the atonic effect by working with other herbal medicines. Gardeniae Fructus causes the blood vessel to contract. but it does not influence the atonic effects of other herbal medicines. However Gardeniae Fructus tends to inhibit the vascular atonic effect of Phellodendri Cortex.

Conclusion:
Based on the above results, it can be said that HwangRyunHaeDok-Tang can be applied to cure hypertension considering those three herbs have significant effects of relaxation.
Key words: HwangRyunHaeDok-Tang, Scutellariae Radix, Coptidis Rhizoma, Phellodendri Cortex, Gardeniae Fructus, hypertension
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