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(1 - 16 of 16)
document
Wenczl, E. (author), van der Schans, G.P. (author), Roza, L. (author), Kolb, R.M. (author), Timmerman, A.J. (author), Smit, N.P.M. (author), Pavel, S. (author), Schothorst, A.A. (author), Centraal Instituut voor Voedingsonderzoek TNO (author)
The question of whether melanins are photoprotecting and/or photosensitizing in human skin cells continues to be debated. To evaluate the role of melanin upon UVA irradiation, DNA single-strand breaks (ssb) were measured in human melanocytes differing only in the amount of pigment produced by culturing at two different concentrations, basic (0...
article 1998
document
Mol, M.A.E. (author), de Vries-Van de Ruit, A.M.B.C. (author), Medisch Biologisch Laboratorium TNO (author)
The concentration- and time-dependent effects of sulphur mustard on cultured human epidermal keratinocyte function were investigated with respect to cell proliferation, DNA and protein synthesis, the level of NAD+ and ATP, and the intracellular activity of lactate dehydrogenase. If human epidermal keratinocytes were stimulated to proliferate by...
article 1992
document
Wade, D.R. (author), Lohman, P.H.M. (author), Medisch Biologisch Laboratorium TNO (author)
Chemicals/CAS: hydrazine, 10217-52-4, 13775-80-9, 18500-32-8, 302-01-2, 7803-57-8; isoniazid, 54-85-3, 62229-51-0, 65979-32-0; manganese, 16397-91-4, 7439-96-5
article 1980
document
van Iersel, M.L.P.S. (author), Cnubben, N.H.P. (author), Smink, N. (author), Koeman, J.H. (author), van Bladeren, P.J. (author), Centraal Instituut voor Voedingsonderzoek TNO (author)
The cyclopentenone prostaglandin A2 (PGA2) is known to inhibit cell proliferation, and metabolism of this compound thus might be important in controlling its ultimate function. The glutathione-related metabolism of PGA2 was therefore investigated both with purified glutathione S-transferase P1-1 (GSTP1-1) and with IGR-39 human melanoma cells....
article 1999
document
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
document
Klein, J.C. (author), Radiobiologisch Instituut TNO (author)
In vitro assays that permit cloning of tumour cells in soft agar have been improved during the last 5 years. Two of them are claimed to be useful as test systems for the screening of new anticancer drugs and even for drug sensitivity testing of individual human tumours in devising individualized cancer chemotherapy regimens. Three assays were...
article 1981
document
Izeboud, C.A. (author), Mocking, J.A.J. (author), Monshouwer, M. (author), van Miert, A.S.J.P.A.M. (author), Witkamp, R.F. (author), Centraal Instituut voor Voedingsonderzoek TNO (author)
For several years it is known that β-adrenergic receptor agonists have anti-inflammatory effects. However, little is known about the role of β- adrenergic receptors on macrophages in the modulation of cytokine production by β-agonists during inflammation. In this study, the presence of β- receptors on PMA-differentiated U937 human macrophages,...
article 1999
document
Emeis, J.J. (author), Edgell, C.J.S. (author), Gaubius instituut TNO (author)
The fibrinolytic characteristics of the endothelial hybrid cell line EA.hy 926, established by fusing a human umbilical vein endothelial cell with a human carcinoma cell line, were studied. The hybrid cell line produced large amounts of tissue-type plasminogen activator (t-PA), plasminogen activator inhibitor type 1, and a small amount of...
article 1988
document
Henneman, S. (author), Bildt, M.M. (author), de Groot, J. (author), Kuijpers-Jagtman, A.M. (author), Von den Hoff, J.W. (author)
The main cells in the periodontal ligament (PDL) are the fibroblasts, which play an important role in periodontal remodelling. Matrix metalloproteinases (MMPs) are largely responsible for the degradation of extracellular matrix proteins in the PDL. Previous studies have indicated that MMP production can be stimulated by the hormone relaxin. This...
article 2008
document
Reichl, F.X. (author), Walther, U.I. (author), Durner, J. (author), Kehe, K. (author), Hickel, R. (author), Kunzelmann, K.H. (author), Spahl, W. (author), Hume, W.R. (author), Benschop, H.P. (author), Forth, W. (author)
Objective: The effect of dental composite components triethyleneglycoldimethacrylate (TEGDMA) and hydroxyethylmethacrylate (HEMA), as well as mercuric chloride (HgCl2) and methylmercury chloride (MeHgCl) was investigated on the release of lactatedehydrogenase (LDH) from alveolar epithelial lung cell lines in vitro. Methods: The confluent cell...
article 2001
document
Medisch Biologisch Laboratorium TNO (author), Mol, M.A.E. (author), van de Ruit, A.M.B.C. (author), Kluivers, A.W. (author)
In cultured human epidermal cells exposure to the vesicant sulfur mustard (HD) causes a decrease of the NAD+ content, which depends on the dose and the time period between exposure to HD and NAD+ measurement. Presumably, this NAD+ loss is due to activation of the enzyme NAD:protein ADP-ribosyltransferase (ADPRT) and may lead to glycolysis...
article 1989
document
Bildt, M.M. (author), Snoek-van Beurden, A.M.P. (author), de Groot, J. (author), van El, B. (author), Kuijpers-Jagtman, A.M. (author), van den Hoff, J.W. (author), Centraal Instituut voor Voedingsonderzoek TNO (author)
Background and Objective: The purpose of this study was to investigate the effects of chemically modified tetracyclines (CMTs) on the production of gelatinases [matrix metalloproteinase (MMP)-2 and -9] by human periodontal ligament (PDL) cells, and on the activity of recombinant gelatinases. Material and Methods: Human PDL cells were cultured...
article 2006
document
Gee, J.M. (author), Wortley, G.M. (author), Johnson, I.T. (author), Price, K.R. (author), Rutten, A.A.J.J.L. (author), Houben, G.F. (author), Penninks, A.H. (author), TNO Voeding (author)
The effects of potato and tomato glycoalkaloids and a saponin mixture from Gypsophila were investigated in cytotoxicity studies (neutral red uptake, mitochondrial MTT reduction and release of lactate dehydrogenase), using cultured cell lines of rat and human intestinal mucosal epithelium. Experiments to assess the effects of these compounds on...
article 1996
document
TNO Kwaliteit van Leven (author), Pasman, W.J. (author), Heimerikx, J. (author), Rubingh, C.M. (author), van den Berg, R. (author), O'Shea, M. (author), Gambelli, L. (author), Hendriks, H.F.J. (author), Einerhand, A.W.C. (author), Scott, C. (author), Keizer, H.G. (author), Mennen, L.I. (author)
Appetite suppressants may be one strategy in the fight against obesity. This study evaluated whether Korean pine nut free fatty acids (FFA) and triglycerides (TG) work as an appetite suppressant. Korean pine nut FFA were evaluated in STC-1 cell culture for their ability to increase cholecystokinin (CCK-8) secretion vs. several other dietary...
article 2008
document
TNO Preventie en Gezondheid (author), Mandard, S. (author), Zandbergen, F. (author), Nguan, S.T. (author), Escher, P. (author), Patsouris, D. (author), Koenig, W. (author), Kleemann, R. (author), Bakker, A. (author), Veenman, F. (author), Wahli, W. (author), Müller, M. (author), Kersten, S. (author)
The fasting-induced adipose factor (FIAF, ANGPTL4, PGAR, HFARP) was previously identified as a novel adipocytokine that was up-regulated by fasting, by peroxisome proliferator-activated receptor agonists, and by hypoxia. To further characterize FIAF, we studied regulation of FIAF mRNA and protein in liver and adipose cell lines as well as in...
article 2004
document
TNO Kwaliteit van Leven (author), Pires, N.M.M. (author), Pols, T.W.H. (author), de Vries, M.R. (author), Tiel, C.M.van (author), Bonta, P.I. (author), Vos, M. (author), Arkenbout, E.K. (author), Pannekoek, H. (author), Jukema, J.W. (author), Quax, P.H.A. (author), de Vries, C.J.M. (author)
BACKGROUND - Restenosis is a common complication after percutaneous coronary interventions and is characterized by excessive proliferation of vascular smooth muscle cells (SMCs). We have shown that the nuclear receptor Nur77 protects against SMC-rich lesion formation, and it has been demonstrated that 6-mercaptopurine (6-MP) enhances Nur77...
article 2007
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