Title

Molecular aspects of arterial smooth muscle contraction: focus on Rho

Document Type

Book Review

Date of Publication

Winter 12-1-2005

Publication Title

Experimental Biology and Medicine

First Page

829

Last Page

835

Location

Atlanta, GA

Abstract

The vascular smooth muscle cell is a highly specialized cell whose primary function is contraction and relaxation. It expresses a variety of contractile proteins, ion channels, and signalling molecules that regulate contraction. Upon contraction, vascular smooth muscle cells shorten, thereby decreasing the diameter of a blood vessel to regulate the blood flow and Pressure. Contractile activity in vascular smooth muscle cells is Initiated by a Ca2+-calmodulin interaction to stimulate phosphorylation of the light chain of myosin. Ca2+-sensitization of the contractile proteins is signaled by the RhoA/Rho-kinase pathway to inhibit the dephosphorylation of the light chain by myosin phosphatase, thereby maintaining force. Removal of Ca2+ from the cytosol and stimulation of myoson phosphatase Initiate the relaxation of vascular smooth muscle.

DOI

https://doi.org/10.1177/153537020523001107

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