Searched for: subject%3A%22Dose%255C-response%255C%2Brelationship%22
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Gaubius Instituut TNO (author), van der Mooren, M.J. (author), Gevers Leuven, J.A. (author), Rolland, R. (author)
Objective: To study the possible changes in serum lipids and lipoproteins during hormone replacement therapy with special emphasis on the possible effects brought about by the progestogen. Design: Open-label randomized prospective comparative study. Setting: Gynecological outpatient department of a university hospital. Patients: Thirty-three...
article 1994
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de Vries, A.C.J. (author), Vermeer, M.A. (author), Bredman, J.J. (author), Bar, P.R. (author), Cohen, L.H. (author), Instituut voor verouderings- en vaatziekten onderzoek TNO (author)
The influence of the 3-hydroxy-3-methyl-glutaryl coenzyme A (HMG-CoA) reductase inhibitors pravastatin and simvastatin on lens cholesterol metabolism was investigated in the rat. Short-term organ culture experiments with explanted lenses from 21-day-old Wistar rats showed that simvastatin was at least 35 times more effective than pravastatin in...
article 1993
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de Munk, G.A.W. (author), Parkinson, J.F. (author), Groeneveld, E. (author), Bang, N.U. (author), Rijken, D.C. (author), IVVO-TNO Gaubius Laboratory, PO Box 430, 2300 AK Leiden, Netherlands Instituut voor verouderings- en vaatziekten onderzoek TNO (author)
Thrombomodulin (TM), a membrane proteoglycan on endothelial cells, binds thrombin in a 1:1 complex, accelerates the protein C activation by thrombin, promotes the thrombin inactivation by antithrombin III and inhibits the procoagulant properties of thrombin. The inactivation of single-chain urokinase-type plasminogen activator (scu-PA) by...
article 1993
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El-Beltagi, H.M. (author), Martens, A.C.M. (author), Lelieveld, P. (author), Haroun, E.A. (author), Hagenbeek, A. (author), Instituut voor Toegepaste Radiobiologie en Immunologie TNO (author)
Acetyldinaline [CI-994; GOE 5549; PD 123 654; 4-acetylamino-N-(2'- aminophenyl)-benzamide] is the acetylated derivative form of the original compound Dinaline (GOE 1734; PD 104 208). The efficacy and toxicity of Acetyldinaline for remission-induction treatment of leukemia were evaluated and compared with those observed in previous studies of...
article 1993
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Vink, A.A. (author), Berg, R.J.W. (author), de Gruijl, F.R. (author), Lohman, P.H.M. (author), Roza, L. (author), Baan, R.A. (author), Centraal Instituut voor Voedingsonderzoek TNO Medisch Biologisch Laboratorium TNO (author)
An immunocytochemical method was developed to study induction and removal of DNA damage in specific cell populations in the epidermis of hairless mice during chronic ultraviolet (UV) exposure. Identification of mouse suprabasal cells was performed with an immunoperoxidase stain. This stain was shown not to affect the fluorescent nuclear stains,...
article 1993
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Centraal Instituut voor Voedingsonderzoek TNO (author), Jonker, D. (author), Woutersen, R.A. (author), van Bladeren, P.J. (author), Til, H.P. (author), Feron, V.J. (author)
In a 4-wk study, 10-wk-old Wistar rats were fed the nephrotoxins hexachloro-1,3-butadiene (HCBD), mercuric chloride, d-limonene and lysinoalanine either alone or in combination. These nephrotoxins damage epithelial cells of the proximal tubules, but by different mechanisms. Each chemical was given alone at a Minimum-Nephrotoxic-Effect Level ...
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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Hermens, A.F. (author), Bentvelzen, P.A.J. (author), Instituut voor Toegepaste Radiobiologie en Immunologie TNO (author)
Rat R2k rhabdomyosarcoma cells were transfected with the human H-ras oncogene, which resulted in increased resistance to cell kill in vitro by a single dose of 137Cs γ-rays. A subline carrying one oncogene showed an increase in the quasi-threshold dose (D(q)) from 0.88 to 1.48 Gy. Another subline containing six oncogenes not only had an...
article 1992
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Brommer, E.J.P. (author), van Bockel, J.H. (author), Gaubius Laboratorium Instituut voor verouderings- en vaatziekten onderzoek TNO (author)
Each of three distinct, concentric layers of human arterial thrombi, was analysed immunochemically for the plasminogen and fibrin content, and for the ex vivo susceptibility to thrombolysis by various thrombolytic agents in a saline or plasma milieu. The age of the thrombus layer determined: (a) the plasminogen content; (b) the fibrin content,...
article 1992
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Verkerk, P.H. (author), Buitendijk, S.E. (author), Nederlands Instituut voor Praeventieve Gezondheidszorg TNO (author)
It is generally believed that non-differential misclassification will lead to a bias toward the null-value. However, using one graphical and one numerical example, we show that in situations where underestimation more than overestimation is the problem, non-differential misclassification may lead to a bias away from the null-value for...
article 1992
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Instituut CIVO-Toxicologie en Voeding TNO (author), Groten, J.P. (author), Luten, J.B. (author), van Bladeren, P.J. (author)
It has been shown that addition of extra calcium/phosphorus (Ca/P), zinc (Zn) and iron (Fe2+) to the diet results in a significant protection against cadmium (Cd) accumulation and toxicity in rats fed inorganic Cd salt. However, it is not clear whether the presence of these mineral supplements in the diet also protects against the Cd uptake from...
article 1992
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Philippens, I.H.C.H.M. (author), Melchers, B.P.C. (author), Wolthuis, O.L. (author)
Behavioral training of guinea pigs by conventional methods, such as used for rats and mice, appears difficult. Hence, only a few behavioral experiments with guinea pigs have been described in the literature. An active avoidance technique in an automated two-way shuttlebox is described using sound as a conditioned (CS) and a tactile stimulus (a...
article 1992
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Instituut CIVO-Toxicologie en Voeding TNO (author), Groten, J.P. (author), Sinkeldam, E.J. (author), Luten, J.B. (author), van Bladeren, P.J. (author)
The distribution of cadmium was examined in rats fed diets containing either cadmium-metallothionein (CdMt) or cadmium chloride (CdCl2) for 4 weeks. The test diets contained 3, 10, or 30 mg Cd/kg diet (3, 10, or 30 ppm) as CdMt or 30 mg Cd/kg diet (30 ppm) as CdCl2. A second study was performed to establish the Cd content in liver and kidneys...
article 1991
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Bloem, M.W. (author), Wedel, M. (author), van Agtmaal, E.J. (author), Speek, A.J. (author), Saowakontha, S. (author), Schreurs, W.H.P. (author), Centraal Instituut voor Voedingsonderzoek TNO (author)
A group of 134 school children aged 3-9 y, with signs of conjunctival xerosis, from the rural area of Sakorn Nakhon province of Northeast Thailand were selected for a controlled study on the short-term effect (2 wk) of a single, oral high dose of vitamin A on iron metabolism. After collection of the baseline data, children within villages were...
article 1990
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Medisch Biologisch Laboratorium TNO (author), Roza, L. (author), Vermeulen, W. (author), Bergen Henegouwen, J.B.A. (author), Eker, A.P.M. (author), Jaspers, N.G.J. (author), Lohman, P.H.M. (author), Hoeijmakers, J.H.J. (author)
UV-induced thymine dimers (10 J/m2 of UV-C) were assayed in normal human and xeroderma pigmentosum (XP) fibroblasts with a monoclonal antibody against these dimers and quantitative fluorescence microscopy. In repair-proficient cells dimer-specific immunofluorescence gradually decreased with time, reaching about 25% of the initial fluorescence...
article 1990
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Gaubius Instituut TNO (author), Princen, H.M.G. (author), Meijer, P. (author), Hofstee, B. (author)
To study the effect of steroid hormones on bile acid synthesis by cultured rat hepatocytes, cells were incubated with various amounts of these compounds during 72 h and conversion of [4-14C]cholesterol into bile acids was measured. Bile acid synthesis was stimulated in a dose-dependent way by glucocorticoids, but not by sex steroid hormones,...
article 1989
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Pikaar, N.A. (author), Wedel, M. (author), van der Beek, E.J. (author), van Dokkum, W. (author), Kempen, H.J.M. (author), Kluft, C. (author), Ockhuizen, T. (author), Hermus, R.J.J. (author), Centraal Instituut voor Voedingsonderzoek TNO (author)
To investigate the effect of moderate alcohol consumption on blood constituents related to cardiovascular disease, 12 male volunteers consumed (instead of their usual alcoholic drinks) four different standardized amounts of red wine in addition to their habitual diet. Each dose was given to the subjects during a period of 5 weeks in a randomized...
article 1987
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Gaubius instituut TNO (author), Kooistra, T. (author), van den Berg, J. (author), Tons, A. (author), Platenburg, G. (author), Rijken, D.C. (author), van den Berg, E.A. (author)
Incubation of cultured human endothelial cells with 5-mM-dibutyryl cyclic AMP led to an approx. 2-fold increase in tissue-type plasminogen-activator (t-PA) production over a 24 h incubation period. The stimulating effect of dibutyryl cyclic AMP could be explained by the slow liberation of butyrate, as the effect could be reproduced by addition...
article 1987
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Radiobiologisch Instituut TNO (author), Varekamp, A.E. (author), de Vries, A.J. (author), Hagenbeek, A. (author)
Interstitial pneumonitis (IP) is one of the major complications after allogeneic bone marrow transplantation (incidence: 30 to 50%, fatality rate: 50 to 60%). Cytomegalovirus is associated with 60% of the cases. When no infectious agent can be detected, it is classified as idiopathic IP (IIP). Factors related to IIP are: remission induction...
article 1986
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Radiobiologisch Instituut TNO (author), van Rongen, E. (author), Tan, C. (author), Zurcher, C. (author)
article 1986
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