Searched for: subject:"Animals"
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Emeis, J.E. (author), Hoekzema, R. (author), de Vos, A.F. (author), TNO Preventie en Gezondheid (author)
In experimental animals and humans, intravenous (IV) injection of endotoxin induces large increases in circulating plasminogen activator inhibitor type-1 (PAI-1), a major inhibitor of blood fibrinolysis. A similar increase is seen after the injection of interleukin-1 (IL-1) or of tumor necrosis factor-α (TNF-α), suggesting that these cytokines...
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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Padro, T. (author), Quax, P.H.A. (author), van den Hoogen, C.M. (author), Roholl, P. (author), Verheijen, J.H. (author), Emeis, J.J. (author), Gaubius Instituut TNO (author)
Plasminogen activator (PA) and PA inhibitor (PAI) antigen, activity, and mRNA were analyzed in the three layers of rat aorta, and the effect of endotoxin on PA and PAI was studied. All PA activity in aorta was identified as tissue-type PA (TPA) activity; no urokinase-type PA was detected. In the tunica adventitia TPA activity, TPA antigen, and...
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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Padró, T. (author), van den Hoogen, C.M. (author), Emeis, J.J. (author), Instituut voor verouderings- en vaatziekten onderzoek TNO (author)
The aim of the present study was to investigate whether hypothyroidism would affect the components of the rat plasma fibrinolytic system. Hypothyroidism was induced by feeding rats a thiouracil-containing diet for 2 weeks. During this period, half of the animals received subcutaneous injections of L-thyroxine (20 μg/kg daily) to restore thyroid...
article 1993
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Tranquille, N. (author), Emeis, J.J. (author), Gaubius Laboratory Instituut voor verouderings- en vaatziekten onderzoek TNO (author)
The modulation of the induced acute release of tissue-type plasminogen activator (t-PA) and of von Willebrand factor (vWF) by compounds affecting cyclic nucleotide levels was studied, using an isolated rat hindleg perfusion system. Platelet-activating factor (PAF; 5 nM) or bradykinin (0.8 μM) were used to induce release of t-PA and vWF. The...
article 1993
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Emeis, J.J. (author), van den Hoogen, C.M. (author), Gaubius Laboratory IVVO-TNO, P.O. Box 430, 2300 AK Leiden, Netherlands Instituut voor verouderings- en vaatziekten onderzoek TNO (author)
Pharmacological modulation of the in vivo induction of plasminogen activator inhibitor type-1 (PAI-1) synthesis was studied in rats using the induction of PAI-1 by endotoxin as a model system. Both the cyclooxygenase inhibitors acetylsalicylic acid and indomethacin enhanced PAI-1 induction. The combined cyclooxygenase-lipoxygenase inhibitor,...
article 1992
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Emeis, J.J. (author), Gaubius Instituut TNO (author)
Chemicals/CAS: Blood Coagulation Factors; Tissue Plasminogen Activator, EC 3.4.21.68
article 1992
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Kooistra, T. (author), van Bennekum, A.M. (author), Hendriks, H.F.J. (author), Brouwer, A. (author), Roholl, P.J.M. (author), Emeis, J.J. (author), Netherlands Instituut voor Verouderings- en Vaatziekten Onderzoek TNO (author)
article 1992
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Emeis, J.J. (author), Verheijen, J.H. (author), Instituut voor Verouderings- en Vaatziekten Onderzoek TNO (author)
Chemicals/CAS: Recombinant Proteins; Tissue Plasminogen Activator, EC 3.4.21.68
article 1992
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Emeis, J.J. (author), Tranquille, N. (author), Gaubius Instituut TNO (author)
Bradykinin will induce, in perfused rat hindlegs, the acute release from endothelial cells of tissue-type plasminogen activator and of von Willebrand factor. This release is mediated by B2-receptors, requires the influx of extracellular calcium, and is modulated by cyclic nucleotides. A possible role of bradykinin in the physiological regulation...
article 1992
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Kooistra, T. (author), Opdenberg, J.P. (author), Toet, K. (author), Hendriks, H.F.J. (author), van den Hoogen, R.M. (author), Emeis, J.J. (author), Gaubius Instituut TNO (author)
Tissue-type plasminogen activator (t-PA) and its inhibitor, plasminogen activator inhibitor 1 (PAI-1), play an important role in regulating the fibrinolytic capacity of plasma. Both t-PA and PAI-1 are synthesized by the endothelium. We report that retinoic acid (vitamin A acid) and other retinoids rather specifically stimulate the production of...
article 1991
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Padro, T. (author), van den Hoogen, C.M. (author), Emeis, J.J. (author), Gaubius Instituut TNO (author)
Plasmin inhibition by rat tissue extracts were compared with rat plasma plasmin inhibition. Nine different tissues were extracted with an acid acetate-buffer (lung, heart, brain, adrenal, aorta, skeletal muscle, spleen and liver) or with KSCN-buffer (kidney), and antiplasmin activity was evaluated by a spectrophotometric method. All tissue...
article 1991
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Quax, P.H.A. (author), van den Hoogen, M. (author), Verheijen, J.H. (author), Padro, T. (author), Zeheb, R. (author), Gelehrter, T.D. (author), van Berkel, T.J.C. (author), Kuiper, J. (author), Emeis, J.J. (author), Gaubius Instituut TNO (author)
The tissue-specific distribution of tissue-type and urokinase-type plasminogen activator (t-PA and u-PA) and their inhibitor type 1 (PAI-1) was analyzed at mRNA level in five major rat organ tissues. t-PA mRNA was detected in lung, kidney, heart, and liver. u-PA mRNA was detected in kidney and lung. Presence of PA mRNA correlated with the...
article 1990
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Padró, T. (author), van den Hoogen, C.M. (author), Emeis, J.J. (author), Gaubius Instituut TNO (author)
Tissue-type plasminogen activator (PA) activity and antigen was measured in nine different tissues from healthy rats (brain, lung, heart, liver, spleen, kidney, adrenal, aorta and skeletal muscle). After extraction in a KSCN buffer (for kidney) or in an acid acetate buffer (for all other tissues), total PA activity was determined by an improved...
article 1990
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Wasser, M.N.J.M. (author), Koppert, P.W. (author), Arndt, J.W. (author), Emeis, J.J. (author), Feitsma, R.I.J. (author), Pauwels, E.K.J. (author), Nieuwenhuizen, W. (author), Gaubius Instituut TNO (author)
Balb/c mice were immunized with human plasmin-generated fibrinogen degradation product Y. Spleen cells were fused with P3X63-Ag8.653 myeloma cells. A clone (Y22) was found that produces monoclonal antibodies (MoAbs) with a strong reactivity with human fibrin and only a weak reactivity with fibrinogen in an enzyme immunoassay (EIA). Y22 also...
article 1989
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van Pelt-Verkuil, E. (author), van de Ree, P. (author), Emeis, J.J. (author), Gaubius Institute TNO, 2300 AP Leiden, Netherlands (author)
The effects of lowering plasma fibrinogen levels by Arvin injections have been investigated in a rat model of arteriosclerosis. In this model air-drying-induced endothelial denudation of the left carotid artery results in myointimal lesion development. Arvin (2 x 50 Units/kg) was given at 4 and 2 hours prior to surgery, reducing plasma...
article 1989
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Tranquille, N. (author), Emeis, J.J. (author), Gaubius Instituut TNO (author)
The acute release of tissue-type plasminogen activator (t-PA) was studied in perfused rat hindlegs. Pretreatment of rats with the protein synthesis inhibitor cycloheximide (2 mg/kg) at 1, 3 or 5 h prior to perfusion of rat hindlegs did not influence the amount of t-PA released by platelet-activating factor (20 nM) or bradykinin (1 μM). The...
article 1989
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Emeis, J.J. (author), van Houwelingen, A.C. (author), van den Hoogen, C.M. (author), Hornstra, G. (author), Gaubius Institute TNO, 2300 AP Leiden, Netherlands (author)
For a period of 6 weeks, 76 healthy male volunteers consumed during their daily main meal the contents of one tin (~ 135 g) of either fish (mackerel) paste or meat paste. Fibrinolytic parameters were determined in plasma samples obtained at the beginning and at the end of the experimental period. No changes were found in plasminogen, α2...
article 1989
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van Hinsbergh, V.W.M. (author), Kooistra, T. (author), van den Berg, E.A. (author), Princen, H.M.G. (author), Fiers, W. (author), Emeis, J.J. (author), Gaubius instituut TNO (author)
The vascular endothelium plays an important role in fibrinolysis by producing tissue-type plasminogen activator (t-PA) and plasminogen activator inhibitor (PAI). The monokine tumor necrosis factor (human recombinant TNF) increased the production of PAI by cultured human endothelial cells from umbilical vein (twofold) and from foreskin...
article 1988
Searched for: subject:"Animals"
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