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Lansink, M. (author), Jong, M. (author), Bijsterbosch, M. (author), Bekkers, M. (author), Toet, K. (author), Havekes, L. (author), Emeis, J. (author), Kooistra, T. (author), Gaubius instituut TNO (author)Several clinical studies have demonstrated an inverse relationship between circulating levels of estrogen and tissue-type plasminogen activator (t-PA). The present study was designed to test the hypothesis that estrogen lower plasma levels of t-PA by increasing its clearance from the bloodstream. 17α-Ethinyl estradiol (EE) treatment resulted in...article 1999
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Páramo, U.A. (author), Panizo, C. (author), Montes, R. (author), Orbe, J. (author), Alegría, E. (author), Martínez-Caro, D. (author), Dooijewaard, G. (author), Gaubius instituut TNO (author)To characterize the extent of activation of the hemostatic system and to detect local alterations which may favour thrombus formation we obtained samples from the right atrium (RA) and left ventricle (LV) of 60 stable angina patients (mean age 59 years, M/F: 49/11) during the cardiac catheterization procedure. None of the patients had a recent...article 1999
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de Valk-de Roo, G.W. (author), Stehouwer, C.D.A. (author), Meijer, P. (author), Mijatovic, V. (author), Kluft, C. (author), Kenemans, P. (author), Cohen, F. (author), Watts, S. (author), Netelenbos, C. (author), Gaubius instituut TNO (author)Currently raloxifene, a selective estrogen receptor modulator, is being investigated as a potential alternative for postmenopausal hormone replacement to prevent osteoporosis and cardiovascular disease. We compared the 2-year effects of raloxifene on a wide range of cardiovascular risk factors with those of placebo and conjugated equine...article 1999
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Larsson, P.T. (author), Wallén, N.H. (author), Wiman, B. (author), Dooijewaard, G. (author), Gaubius instituut TNO (author)Objective: To study the influence of α- and β-adrenoceptor stimulation in vivo on fibrinolysis in healthy male volunteers. Design: Infusions were given in a single blind fashion and in a randomized order if placebo infusions were included. Setting: University Department (Karolinska Hospital). Subjects: Thirty-four healthy, non-smoking male...article 1999
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Sitter, T. (author), Toet, K. (author), Quax, P. (author), Kooistra, T. (author), Gaubius instituut TNO (author)Background. Human mesothelial cells (HMCs) have an important role in maintaining an adequately functioning fibrinolytic system in the peritoneal cavity by secreting the fibrinolytic enzymes tissue-type and urokinase-type plasminogen activator (t-PA and u-PA), as well as a specific PA inhibitor, PA inhibitor type 1 (PAI-1). In this study, we...article 1999
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Braat, E.A.M. (author), Los, P. (author), Rijken, D.C. (author), Gaubius Instituut TNO (author)Thrombin cleaves single-chain urokinase-type plasminogen activator (scu- PA) into a virtually inactive two-chain form (tcu-PA/T), a process which may contribute to the maintenance of a fresh blood clot. We have examined the inactivation of scu-PA by thrombin in a plasma milieu to get more insight in the physiological relevance of this phenomenon...article 1998
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Rosén, S. (author), Wejkum, L. (author), Billing-Claeson, S. (author), Ghosh, R. (author), Grdic, K. (author), Chmielewska, J. (author), Meijer, P. (author), Kluft, C. (author), Tengborn, L. (author), Conkie, J. (author), Walker, I. (author), Gaubius Instituut TNO (author)A chromogenic bioimmunoassay method for determination of t-PA activities has been evaluated on plasmas from healthy individuals and from thromboembolic patients. The assay consists of an initial binding and washing step, whereby plasma t-PA is bound to a specific monoclonal t-PA antibody, which is coated on to microplate wells, followed by a...article 1998
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Nieuwenhuys, C.M.A. (author), Béguin, S. (author), Offermans, R.F.G. (author), Emeis, J.J. (author), Hornstra, G. (author), Heemskerk, J.W.M. (author), Gaubius Instituut TNO (author)We investigated the effects of dietary polyunsaturated fatty acids (PUFAs) on blood lipids and processes that determine hemostatic potential: platelet activation, coagulation, and fibrinolysis. For 8 to 10 weeks, Wistar rats were fed a high-fat diet containing various amounts (2% to 16%) of n-3 PUFAs derived from fish oil (FO) or a diet enriched...article 1998
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Hendriks, H.F.J. (author), van der Gaag, M.S. (author), Centraal Instituut voor Voedingsonderzoek TNO (author)Despite the solid evidence for thrombosis playing a key role in coronary heart disease (CHD) mortality, identifying specific haemostatic risk factors for CHD has been difficult except for fibrinogen. Excessive alcohol consumption clearly affects platelet function. Moderate alcohol consumption may affect several haemostatic factors, including...article 1998
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Brussaard, H.E. (author), Gevers Leuven, J.A. (author), Frölich, M. (author), Kluft, C. (author), Krans, H.M.J. (author), Gaubius Instituut TNO (author)Oestrogen replacement therapy is associated with a decreased risk of cardiovascular disease in postmenopausal women. Patients with non-insulin- dependent diabetes mellitus (NIDDM) have an increased cardiovascular risk. However, oestrogen replacement therapy is only reluctantly prescribed for patients with NIDDM. In a double blind randomized...article 1997
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Bos, R. (author), van Leuven, C.J.M. (author), Stolk, J. (author), Hiemstra, P.S. (author), Ronday, H.K. (author), Nieuwenhuizen, W. (author), TNO Preventie en Gezondheid (author)Upon stimulation, polymorphonuclear leucocytes (PMNs) release potent serine proteases, i.e. elastase, cathepsin C and proteinase 3, which contribute to the degradation of tissue and plasma components. Here, we describe the development of a plasma test to assess PMN-mediated fibrinogenolysis as a biochemical marker for actual PMN-derived...article 1997
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Kluft, C. (author), Lansink, M. (author), Gaubius Instituut TNO (author)Combined oral contraceptives (COCs) have effects on a large number of haemostasis variables. We have summarised literature data on effects of COCs containing 30-35 μg ethinyl estradiol for the third generation of progestogens (PGs): desogestrel, gestodene and norgestimate. It is concluded that about 15 variables show a shift in distribution of...article 1997
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van der Bom, J.G. (author), de Knijff, P. (author), Haverkate, F. (author), Bots, M.L. (author), Meijer, P. (author), de Jong, P.T.V.M. (author), Hofman, A. (author), Kluft, C. (author), Grobbee, D.E. (author), Gaubius Instituut TNO (author)Background: Impaired fibrinolytic capacity, as assessed by euglobulin clot lysis time or plasma concentration of fibrinolytic parameters, has been associated with an increased risk of myocardial infarction (MI). We studied the association of a polymorphism in the gene for TPA and of plasma concentrations of TPA (antigen and activity) with the...article 1997
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Schuit, A.J. (author), Schouten, E.G. (author), Kluft, C. (author), de Maat, M. (author), Menheere, P.P.C.A. (author), Kok, F.J. (author), Gaubius Instituut TNO (author)The elevated incidence of thrombotic disease in elderly people may be associated with an increase in PAI-1 and fibrinogen with ageing. Cross-sectional studies report an inverse relation of PAI-1 and fibrinogen with physical activity, but training studies show inconsistent results. In a controlled intervention study among elderly subjects (aged...article 1997
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Gaubius Instituut TNO (author), Sakharov, D.V. (author), Plow, E.F. (author), Rijken, D.C. (author)The precursor of plasma carboxypeptidase B (pCPB) also known as thrombin-activable fibrinolysis inhibitor can be converted by thrombin to an active enzyme capable of eliminating C-terminal Lys- and Arg-residues from proteins. The activation is about 1000-fold more efficient in the presence of thrombomodulin (TM). We investigated the...article 1997
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Juhan-Vague, I. (author), Pyke, S.D.M. (author), Alessi, M.C. (author), Jespersen, J. (author), Haverkate, F. (author), Thompson, S.G. (author), Hematology Laboratory, CHU Timone, Marseille, France Medical Statistics Unit, London (UK) Sch. of Hyg./Trop. Med. Centralsygehuset, Esbjerg, Denmark Gaubius Laboratory Hematology Laboratory, CHU Timone, 13385 Marseille Cedex 5, France TNO Preventie en Gezondheid (author)Background: Disturbances of the fibrinolytic system that lead to decreased removal of fibrin deposits may be important risk factors for coronary thrombosis. There is as yet no consensus on the prognostic value of fibrinolytic parameters, which may be attributed in part to the choice of confounding variables controlled for. Methods and Results:...article 1996
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te Velthuis - Wierik, E.J.M. (author), Kluft, C. (author), van den Berg, H. (author), Weststrate, J.A. (author), Centraal Instituut voor Voedingsonderzoek TNO (author)A high fat intake has been associated with the high prevalence of coronary heart disease (CHD) in most Western countries. Consumption of reduced-fat products might reduce fat intake and beneficially affect markers of CHD risk. Therefore, the effects of 6 months of realistic consumption of reduced-fat products on energy and fat intake,...article 1996
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- Slagboom, P.E. (author), Kluft, C. (author), Gaubius Laboratory TNO Preventie en Gezondheid (author) article 1996
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Leebeek, F.W.G. (author), Los, P. (author), Kluft, C. (author), Gaubius Instituut TNO (author)We have studied the plasminogen-binding and non-binding molecular forms of α2-antiplasmin (α2-AP), the major inhibitor of plasmin, using a modification of the crossed immunoelectrophoresis technique (mCIE). The previous technique using addition of Lys-plasminogen to the gel of the first dimension electrophoresis was simplified using commercially...article 1996
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Quax, P.H.A. (author), Lamfers, M.L.M. (author), Grimbergen, J.M. (author), Teeling, J. (author), Hoeben, R.C. (author), van Nieuw Amerongen, G.P. (author), van Hinsbergh, V.W.M. (author), Gaubius Instituut TNO (author)The plasminogen activation (PA) system is involved in vascular remodelling. Modulating its activity in vascular cells might be a way to interfere in processes such as angiogenesis and restenosis. Adenoviral vectors have become a favourable tool for direct gene transfer into vascular cells. In the interest of using adenoviral vectors to modulate...article 1996