Summary
An overview is given of the current understanding of the mechanism of contraction of vascular smooth muscle. The regulation of vascular tone by intracellular ionized calcium levels appears to occur primarily through calciumdependent phosphorylation of the myosin light chains by the enzyme myosin light chain kinase. Evidence is presented that additional relatively calcium-independent processes also exist and contribute to the regulation of vascular tone. A scheme is presented whereby vasoconstriction may occur in the absence of any change in cytoplasmic ionized calcium levels. The multiplicity of excitation-contraction coupling pathways in vascular smooth muscle predicts a multitude of rational therapeutic approaches to vascular pathologies.
Similar content being viewed by others
References
Morgan JP, Morgan KG. Vascular smooth muscle: The first recorded Ca2+ transients.Pflügers Archiv 1982;395:75–77.
DeFeo TT, Briggs GM, Morgan KG, Ca++ signals obtained with multiple indicators in mammalian vascular muscle cells.Am J Physiol 1987;253:H1456-H1461.
Papageorgiou P, Morgan KG. Changes in [Ca2+]i in vascular smooth muscle cells isolated from coarctation-hypertensive rats.Biophys J 1989;55:469a.
Morgan JP, Morgan KG. Stimulus-specific patterns of intracellular calcium levels in ferret portal vein smooth muscle.J Physiol (London) 1984;351:155–167.
DeFeo TT, Morgan KG, Calcium-force relationships as detected with aequorin in two different vascular smooth muscles of the ferret.J Physiol (London) 1985;369:269–282.
Bradley AB, Morgan KG. Alteration in cytoplasmic calcium sensitivity during porcine coronary artery contraction as detected by aequorin.J Physiol (London) 1987;385:437–448.
Jiang MJ, Morgan KG. Intracellular calcium levels in phorbol ester-induced contraction of vscular muscle.Am J Physiol 1987;253:H1365-H1371.
Morgan KG, Papageorgiou P, Jiang MJ. Pathophysiological role of [Ca2+]i in the development of vascular smooth muscle tone.Am J Cardiol 1989;64:35F-40F.
Kamm KE, Stull JT. The function of myosin and myosin light chain kinase phosphorylation in smooth muscle.Ann Rev Pharmacol Toxicol 1985;25:593–620.
Jiang MJ, Morgan KG. Agonist-specific myosin plhosphorylation and intracellular calcium during isometric contractions of arterial smooth muscle.Pflügers Archiv 1989; 413:637–643.
Ruzycky AL, Morgan KG. Involvement of the protein kinase C system in calcium-force relationships in ferret aorta.Br J Pharmacol 1989;97:391–400.
Sobieszek A. Ca-linked phosphorylation of a light chain of vertebrate smooth muslce myosin.Eur J Biochem. 1977;73:477–483.
Rembold CM, Murphy RA. [Ca2+]i-dependent myosin phosphorlation in phorbol diester stimulated smooth muscle contraction.Am J Physiol 1988;255:C719-C723.
DeFeo TT, Morgan KG. Calcium-free coupling mechanisms during vasodilator-induced relation of ferret aorta.J Physiol 1989;412:123–133.
Pawlowski J, Morgan KG. The warming-induced contraction of aortic smooth muscle is independent of extracellular and intracellular calcium.Biophys J 1990;57:157a
Pawlowski J, Morgan KG. Differences in temperature dependence of intrinsic tone betweenaorta and renal artery.Biophys J 1989;55:72a.
Singer HA, Baker KM. Calcium dependence of 12, 13-dibutyrate-induced force and myosin light chain phosphorylation in arterial smooth muscle.J Pharmacol Exp Therap 1987;243:814–821.
Chatterjee M, Tejada M. Phorbol ester-induced contractiions in chemically skinned vascular smooth muscle.Am J Physiol 1986;251:C356-C361.
Worley PF, Baraban JM, DeSouza EB, Snyder SH. Mapping second messenger systems in the brain: Differential localizations of adenylate cyclase and protein kinase-C.Proc Natl Acad Sci USA 1986;83:4053–4057.
Berridge MJ, The molecular basis of communication within the cell.Sci Amer 1985;253:142–152.
Nishizuka Y. Perspectives on the role of protein kinase C in stimulus-response coupling.J Natl Cancer Inst 1986;76:363–370.
Matozaki T, Williams JA. Multiple sources of 1, 2-diacylglycerol in isolated rat pancreatic acini stimulated by cholecystokinin.J Biol Chem 1989;264:14729–14734.
Martinson EA, Goldstein D, Brown JH. Muscarinic receptor activation of phosphatidylcholine hydrolysis.J Biol Chem 1989;264:14748–14754.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Morgan, K.G. The role of calcium in the control of vascular tone as assessed by the Ca2+ indicator aequorin. Cardiovasc Drug Ther 4, 1355–1362 (1990). https://doi.org/10.1007/BF02018263
Issue Date:
DOI: https://doi.org/10.1007/BF02018263