Summary
Experiments with permeabilised platelets, and with intact platelets loaded with fluorescent Ca2+-indicators, over the past several years have greatly extended our knowledge and understanding of cytosolic Ca2+ as a platelet activator and its interactions with other cytosolic regulators. This article outlines insights, gained from the use of the fluorescent dyes, into maintenance and restoration of basal [Ca2+]i, mechanisms of receptor-mediated Ca2+-mobilisation and quantitation of [Ca2+]i/response relations in intact human platelets.
Similar content being viewed by others
References
Brass, L.F., Laposata, M., Banga, H.S., and Rittenhouse, S.E., Regulation of the phosphoinositide hydrolysis pathway in thrombinstimulated platelets by a pertussis toxin-sensitive guanine nucleotidebinding protein. J. biol. Chem.261 (1986) 16838–16847.
Enyedi, A., Sarkadi, B., Foldes-Papp, Z., Monostory, S., and Gardos, G., Demonstration of two distinct calcium pumps in human platelet membrane vesicles. J. biol. Chem.261 (1986) 9558–9563.
Feinstein, M.B., and Fraser, C., Human platelet secretion and aggregation induced by calcium ionophores. J. gen. Physiol.66 (1975) 561–581.
Hack, N., Croset, M., and Crawford, N., Studies on the bivalentcation activated ATPase activities of highly purified human platelet surface and intracellular membranes. Biochem. J.233 (1986) 661–668.
Hallam, T.J., Daniel, J.L., Kendrick-Jones, J., and Rink, T.J., Relationship between cytoplasmic free calcium and myosin light chain phosphorylation in intact platelets. Biochem. J.232 (1985) 373–377.
Hallam, T.J., and Rink, T.J., Response to adenosine diphosphate in human platelets loaded with the fluorescent Ca2+ indicator quin 2. J. Physiol.368 (1985) 131–146.
Hallam, T.J., and Rink, T.J., Agonists stimulate divalent cation channels in the plasma membrane of human platelets. FEBS Lett.186 (1985) 175–179.
Hallam, T.J., Sanchez, A., and Rink, T.J., Stimulus-response coupling in human platelets: changes evoked by platelet-activation factor in cytoplasmic free calcium monitored with the fluorescent Ca indicator, quin 2. Biochem. J.218 (1984) 819–827.
Knight, D.E., and Scrutton, M.C., Direct evidence for a role for Ca2+ in amine storage granule secretion by human platelets. Thrombosis Res.20 (1980) 437–446.
Knight, D.E., and Scrutton, M.C., Gaining access to the cytosol: the technique and applications of electropermeabilization. Biochem. J.234 (1986) 497–506.
MacIntyre, D.E., Buchfield, M., and Shaw, A.M., Regulation of platelet cytosolic free calcium by cyclic nucleotides and protein kinase C. FEBS Lett.188 (1985) 383–388.
Massini, P., and Luscher, E.F., Some effects of ionophores for divalent cations on blood platelets. Comparison with the effects of thrombin. Biochim. biophys. Acta372 (1974) 109–121.
Massini, P., and Luscher, E.F., On the significance of the influx of calcium ions into stimulated human blood platelets. Biochim. biophys. Acta416 (1976) 652–663.
O’Rourke, F.A., Halenda, S.P., Zavoico, G.B., and Feinstein, M.B., Inositol trisphosphate-induced Ca2+ release from human platelet membranes. J. biol. Chem.260 (1985) 956–962.
Pipili, E., Platelet membrane potential: simultaneous measurement of dis-C3-(5) fluorescence and optical density. Thromb. Haemostasis54 (1985) 645–651.
Pollock, W.K., Irvine, R.F., and Rink, T.J., Free Ca2+ requirements of agonist-induced thromboxane-A2 synthesis in human platelets. Eur. J. Pharmac.132 (1986) 309–313.
Pollock, W.K., and Rink, T.J., Thrombin and ionomycin can raise platelet cytosolic Ca2+ to micromolar levels by discharge of internal Ca2+ stores: studies using fura-2. Biochem. biophys. Res. Commun.139 (1986) 308–314.
Pollock, W.K., Rink, T.J., and Irvine, R.F., Liberation of [3H] arachidonic acid and changes in cytosolic free calcium in fura-2-loaded human platelets stimulated by ionomycin and collagen. Biochem. J.235 (1986) 869–877.
Pollock, W.K., Sage, S.O., and Rink, T.J., Stimulation of Ca2+ efflux from fura-2-loaded platelets activated by thrombin or phorbol myristate acetate. FEBS Lett.210 (1987) 132–136.
Rink, T.J., and Hallam, T.J., What turns platelets on? Trends biochem. Sci.9 (1984) 215–219.
Rink, T.J., Sanchez, A., and Hallam, T.J., Diacylglycerol and phorbol ester stimulate secretion without raising cytoplasmic free calcium in human platelets. Nature305 (1983) 317–319.
Rink, T.J., Smith, S.W., and Tsien, R.Y., Cytoplasmic free Ca2+ in human platelets: Ca2+ thresholds and Ca-independent activation for shape-change and secretion. FEBS Lett.148 (1982) 21–26.
Sage, S.O., and Rink, T.J., Inhibition by forskolin of cytosolic calcium rise, shape change and aggregation in quin 2-loaded human platelets. FEBS Lett.188 (1985) 135–140.
Sage, S.O., and Rink, T.J., Effects of ionic substitution on [Ca2+]i rises evoked by thrombin and PAF in human platelets. Eur. J. Pharmac.128 (1986) 99–107.
Sage, S.O., and Rink, T.J., Kinetic differences between thrombin-induced and ADP-induced calcium influx and release from internal stores in fura-2-loaded human platelets. Biochem. biophys. Res. Commun.136 (1986) 1124–1129.
Simpson, A.W.M., Hallam, T.J., and Rink, T.J., Low concentrations of the stable prostaglandin endoperoxide U 44 069 stimulate shape change in quin2-loaded platelets without a measurable increase in [Ca2+]i. FEBS Lett.201 (1986) 301–305.
Steiner, B., and Luscher, E.F., Evidence that the platelet plasma membrane does not contain a [Ca2++Mg2+]-dependent ATPase. Biochem. biophys. Acta818 (1985) 299–309.
Tsien, R.Y., Pozzan, T., and Rink, T.J., Calcium homeostasis intact lymphocytes: cytoplasmic free calcium monitored with a new, intracellularly trapped fluorescent indicator. J. Cell Biol.94 (1982) 335–340.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Rink, T.J. Cytosolic calcium in platelet activation. Experientia 44, 97–100 (1988). https://doi.org/10.1007/BF01952188
Published:
Issue Date:
DOI: https://doi.org/10.1007/BF01952188