ENDOTHELIN(B) RECEPTOR ON GUINEA-PIG SMALL INTESTINAL SMOOTH-MUSCLE CELLS

被引:39
作者
YOSHINAGA, M
CHIJIIWA, Y
MISAWA, T
HARADA, N
NAWATA, H
机构
来源
AMERICAN JOURNAL OF PHYSIOLOGY | 1992年 / 262卷 / 02期
关键词
ENDOTHELIN-1-3; ENDOTHELIN RECEPTOR SUBTYPE; BINDING ASSAY;
D O I
10.1152/ajpgi.1992.262.2.G308
中图分类号
Q4 [生理学];
学科分类号
071003 ;
摘要
We investigated the binding characteristics of the endothelin (ET) receptor and the mechanism by which ET induces contraction of longitudinal smooth muscle cells of the guinea pig small intestine by using vasoactive intestinal contractor (VIC), a mouse variant of ET-2. A functional receptor for VIC was found to exist on longitudinal smooth muscle cells. These cells showed a similar binding of and contractile response to ET-1, ET-2, and ET-3. Inhibitors of both intracellular and extracellular Ca2+ movement attenuated the VIC-induced contraction of longitudinal smooth muscle cells. These results suggest that smooth muscle cells of the guinea pig small intestine express the ET(B) receptor that primarily mediates the contractile effect on smooth muscle cells. In addition, ET-induced contraction depends on intracellular as well as extracellular Ca2+.
引用
收藏
页码:G308 / G311
页数:4
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