A perspective of smooth muscle contractility through actions of vanadium compounds.
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1999-07-25
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Abstract
Smooth muscle contraction has a characteristic step-response with successive additions of stimulating compounds, and instant reversal on withdrawing the stimulus, indicative of an equilibrium situation wherein continuous, rapid reactions are occurring. Vanadium compounds, ortho- and meta-vanadates, decavanadate and peroxovanadate, were found to contract a variety of smooth muscles. Their actions were analyzed with respect to activation of receptors, increase in the intracellular calcium concentration, and increase in calmodulin-dependent myosin light chain phosphorylation leading to contraction. A new perspective of smooth muscle contractility has emerged from the studies with vanadium compounds suggesting control mechanisms involving phosphorylation for contraction and redox for relaxation.
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84 references.
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Ramasarma T, Venkataraman BV. A perspective of smooth muscle contractility through actions of vanadium compounds. Indian Journal of Physiology and Pharmacology. 1999 Jul; 43(3): 277-95