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Hegeman, R.J. (author), van den Eijnden-Schrauwen, Y. (author), Emeis, J.J. (author), Gaubius Instituut TNO (author)The effect of compounds increasing intracellular adenosine 3':5'cyclic monophosphate [cAMP](i) levels (prostacyclin. isoproterenol, forskolin, cholera toxin), and of the cAMP analogs 8-bromo-cAMP and dibutyrpl-cAMP, on the regulated secretion (acute release) of tissue-type plasminogen activator (tPA) and von Willebrand factor (vWF) was studied...article 1998
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van den Eijnden-Schrauwen, Y. (author), Atsma, D.E. (author), Lupu, F. (author), de Vries, R.E.M. (author), Kooistra, T. (author), Emeis, J.J. (author), TNO Preventie en Gezondheid (author)In this study, we investigated the role of Ca2+ and G proteins in thrombin-induced acute release (regulated secretion) of tissue-type plasminogen activator (TPA) and yon Willebrand factor (vWF), using a previously described system of primary human umbilical vein endothelial cells (HUVECs). The acute release of TPA and vWF, as induced by α...article 1997
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Gaubius Instituut TNO (author), Emeis, J.J. (author), Eijnden van den - Schrauwen, Y. (author), van den Hoogen, C.M. (author), de Priester, W. (author), Westmuckett, A. (author), Lupu, F. (author)In previous studies we have shown that, after stimulation by a receptor ligand such as thrombin, tissue-type plasminogen activator (tPA) and von Willebrand factor (vW(f)) will be acutely released from human umbilical vein endothelial cells (HUVEC). However, the mechanisms involved in the secretion of these two proteins differ in some respects,...article 1997
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- van den Eijnden-Schrauwen, Y. (author), Lakenberg, N. (author), Emeis, J.J. (author), de Knijff, P. (author), TNO Preventie en Gezondheid (author) article 1995
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van den Eijnden-Schrauwen, Y. (author), Kooistra, T. (author), de Vries, R.E.M. (author), Emeis, J.J. (author), Gaubius Instituut TNO (author)The process of acute release of tissue-type plasminogen activator (tPA) is important in locally speeding up fibrinolysis. Using a sensitive enzyme- linked immunosorbent assay for tPA, we investigated the acute release of tPA from cultured human umbilical vein endothelial cells. The addition of thrombin (0.003 to 3 NIH U/mL) caused the dose...article 1995
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Schrauwen, Y. (author), de Vries, R.E.M. (author), Kooistra, T. (author), Emeis, J.J. (author), TNO Preventie en Gezondheid (author)The acute release of t-PA was studied in vitro in human endothelial cells from different origin. It proved possible to enhance the amounts of t-PA which can be released by increasing t-PA synthesis, both in vitro, and in vivo in rats. These data suggest the feasibility to induce and (or) enhance acute release of t-PA in man. Chemicals/CAS:...article 1994
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Kooistra, T. (author), Schrauwen, Y. (author), Arts, J. (author), Emeis, J.J. (author), Gaubius Instituut TNO (author)The fibrinolytic activity of blood is to a large extent determined by the plasma level of tissue-type plasminogen activator (t-PA). Changes in the plasma level of t-PA are mainly achieved by the endothelium by two mechanisms: (a) a rapid, short-term release of t-PA, which occurs within minutes (acute release, regulated secretion) and (b) a long...article 1994
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Schrauwen, Y. (author), Emeis, J.J. (author), Kooistra, T. (author), TNO Preventie en Gezondheid (author)The development of a highly sensitive, enzyme-linked immunosorbent assay (ELISA) for tissue-type plasminogen activator (tPA) is described. The use of a biotin-avidin system resulted in a detection limit of 10 pg of tPA per ml, which is 50 to 150 times more sensitive than commercially-available ELISAs. Free tPA and tPA complexed to PA inhibitor...article 1994