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Isolation and characterization of single vascular smooth muscle cells from spontaneously hypertensive rats.

作者信息

Bolzon B J, Cheung D W

机构信息

Department of Pharmacology, University of Toronto, Ontario, Canada.

出版信息

Hypertension. 1989 Aug;14(2):137-44. doi: 10.1161/01.hyp.14.2.137.

DOI:10.1161/01.hyp.14.2.137
PMID:2474494
Abstract

To study the properties of vascular smooth muscle in hypertension without the influence of the nerves and endothelium, a procedure was developed to isolate single smooth muscle cells from tail arteries of spontaneously hypertensive rats (SHR) and Wistar-Kyoto (WKY) normotensive control rats. Perfusion of intact arteries with a solution of papain and collagenase produced dense populations of viable cells (more than 10(4) cells/ml) that remained relaxed in the presence of physiological levels of calcium. Contractile responses of smooth muscle cells from the SHR were significantly more sensitive to noradrenaline, potassium depolarization, and the calcium channel agonist Bay K 8644 compared with those from WKY rats. Enhanced sensitivity to calcium in the SHR was also observed on readdition of calcium to cells preincubated in noradrenaline or KCl in a calcium-free medium. These results provide evidence for alterations in the properties of vascular smooth muscle in the SHR at the single cell level.

摘要

相似文献

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Isolation and characterization of single vascular smooth muscle cells from spontaneously hypertensive rats.
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