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Centraal Instituut voor Voedingsonderzoek TNO TNO Voeding (author), Welters, M.J.P. (author), Fichtinger-Schepman, A.M.J. (author), Baan, R.A. (author), Jacobs-Bergmans, A.J. (author), Kegel, A. (author), van der Vijgh, W.J.F. (author), Braakhuis, B.J.M. (author)Total platinum contents and cisplatin-DNA adduct levels were determined in vivo in xenografted tumour tissues in mice and in vitro in cultured tumour cells of head and neck squamous cell carcinoma (HNSCC), and correlated with sensitivity to cisplatin. In vivo, a panel of five HNSCC tumour lines growing as xenografts in nude mice was used. In...article 1999
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Korst, A.E.C. (author), Boven, E. (author), van der Sterre, M.L.T. (author), Fichtinger-Schepman, A.M.J. (author), van der Vijgh, W.J.F. (author), Centraal Instituut voor Voedingsonderzoek TNO (author)Amifostine (Ethyol, WR-2721) is in use in the clinic as a protector against platinum-induced toxicities. We have previously reported that amifostine induced a potentiation of the antitumour activity of carboplatin in human ovarian cancer xenografts. An influence of amifostine on the pharmacokinetics of carboplatin, resulting in higher platinum...article 1998
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Korst, A.E.C. (author), van der Sterre, M.L.T. (author), Gall, H.E. (author), Fichtinger-Schepman, A.M.J. (author), Vermorken, J.B. (author), van der Vijgh, W.J.F. (author), Centraal Instituut voor Voedingsonderzoek TNO (author)The pharmacokinetics of cisplatin was investigated in 13 patients receiving 18 courses of cisplatin alone or in combination with amifostine to investigate the influence of amifostine (WR 2721; Ethyol) on the pharmacokinetics of cisplatin. Cisplatin was administered as a 1-h i.v. infusion, whereas amifostine was given i.v. over 15 min just before...article 1998
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Sherratt, P.J. (author), Manson, M.M. (author), Thomson, A.M. (author), Hissink, E.A.M. (author), Neal, G.E. (author), van Bladeren, P.J. (author), Green, T. (author), Hayes, J.D. (author), Centraal Instituut voor Voedingsonderzoek TNO (author)A characteristic feature of the class Theta glutathione S-transferase (GST) T1-1 is its ability to activate dichloromethane and dibromoethane by catalysing the formation of mutagenic conjugates. The level of the GSTT1 subunit within tissues is an important determinant of susceptibility to the carcinogenic effects of these dihaloalkanes. In the...article 1998
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Blommaert, F.A. (author), Floot, B.G.J. (author), van Dijk-Knijnenburg, H.C.M. (author), Berends, F. (author), Baan, R.A. (author), Schornagel, J.H. (author), den Engelse, L. (author), Fichtinger-Schepman, A.M.J. (author), Centraal Instituut voor Voedingsonderzoek TNO (author)We have studied the formation and repair of cisplatin-DNA adducts in wild-type mouse leukemia L1210/0 cells and in the sublines L1210/2 and L1210/5, which differ in cisplatin sensitivity. In a colony-formation assay these sublines were 9- and 22-fold more resistant compared to L1210/0, respectively. Cisplatin-induced DNA modification was studied...article 1998
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Centraal Instituut voor Voedingsonderzoek TNO TNO Voeding (author), Welters, M.J.P. (author), Fichtinger-Schepman, A.M.J. (author), Baan, R.A. (author), Flens, M.J. (author), Scheper, R.J. (author), Braakhuis, B.J.M. (author)Resistance to chemotherapy is a major problem in the treatment of patients with head and neck squamous cell carcinoma (HNSCC). Important factors involved are drug detoxification by glutathione (GSH) and reduced drug accumulation due to active transport out of the cell by so-called 'multidrug resistance-related proteins'. We have studied a panel...article 1998
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Korst, A.E.C. (author), van der Sterre, M.L.T. (author), Eeltink, C.M. (author), Fichtinger-Schepman, A.M.J. (author), Vermorken, J.B. (author), van der Vijgh, W.J.F. (author), Centraal Instituut voor Voedingsonderzoek TNO (author)We showed previously that amifostine (WR 2721; Ethyol), a protector against carboplatin-induced toxicities, changed the pharmacokinetics of carboplatin in tumor-bearing nude mice. In the present study, the influence of amifostine on the pharmacokinetics of carboplatin was studied in patients when carboplatin was given in combination with three...article 1997
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TNO Voeding Centraal Instituut voor Voedingsonderzoek TNO (author), Braakhuis, B.J.M. (author), Klaassen, I. (author), van der Leede, B.M. (author), Cloos, J. (author), Brakenhoff, R.H. (author), Copper, M.P. (author), Teerlink, T. (author), Hendriks, H.F.J. (author), van der Saag, P.T. (author), Snow, G.B. (author)Retinoids can reverse potentially premalignant lesions and prevent second primary tumours in patients with head and neck squamous cell carcinoma (HNSCC). Furthermore, it has been reported that acquired resistance to all-trans retinoic acid (RA) in leukaemia is associated with decreased plasma peak levels, probably the result of enhanced retinoid...article 1997
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Centraal Instituut voor Voedingsonderzoek TNO (author), Korst, A.E.C. (author), Boven, E. (author), van der Sterre, M.L.T. (author), Fichtinger-Schepman, A.M.J. (author), van der Vijgh, W.J.F. (author)We have previously reported that amifostine potentiates the anti-tumour activity of carboplatin in mice. The present study was carried out in well-established human ovarian cancer xenografts OVCAR-3, A2780 and FMa grown subcutaneously in the nude mouse. It was found that a single dose of amifostine resulted in a higher increase in the anti...article 1997
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Farmer, P.B. (author), Sepai, O. (author), Lawrence, R. (author), Autrup, H. (author), Nielsen, P.S. (author), Baan, R.A. (author), van Delft, J.H.M. (author), Steenwinkel, M.J.S.T. (author), Instituut CIVO-Toxicologie en Voeding TNO (author)A coordinated study was carried out on the development, evaluation and application of biomonitoring procedures for populations exposed to environmental genotoxic pollutants. The procedures used involved both direct measurement of DNA or protein damage (adducts) and assessment of secondary biological effects (mutation and cytogenetic damage)....article 1996
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Rompelberg, C.J.M. (author), Vogels, J.T.W.E. (author), de Vogel, N. (author), Bruijntjes-Rozier, G.C.D.M. (author), Stenhuis, W.H. (author), Bogaards, J.J.P. (author), Verhagen, H. (author), TNO Voeding (author)1. In order to study the antigenotoxic potential of eugenol in humans, ten healthy non-smoking males ingested a daily amount of 150 mg eugenol or the placebo for seven consecutive days. After a washout period of one week, groups ingesting eugenol or the placebo were crossed and received the other treatment for seven consecutive days. 2. On days...article 1996
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TNO Nutrition and Food (author), Speelmans, G. (author), Sips, W.H.H.M. (author), Grisel, R.J.H. (author), Staffhorst, R.W.H.M. (author), Fichtinger-Schepman, A.M.J. (author), Reedijk, J. (author), de Kruijff, B. (author)The interaction of the anti-cancer drug cis-diamminedichloroplatinum(II) (cisPt) with model membranes was studied, with emphasis on the cisPt and phospholipid species involved. Binding studies using large unilamellar vesicles have revealed that: (i) Interaction involved negatively charged phospholipids only, and (ii) Interaction with negatively...article 1996
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Dirven, H.A.A.M. (author), Megens, L. (author), Oudshoorn, M.J. (author), Dingemanse, M.A. (author), van Ommen, B. (author), van Bladeren, P.J. (author), Instituut CIVO-Toxicologie en Voeding TNO (author)Development of drug resistance against alkylating cytostatic drugs has been associated with higher intracellular concentrations of glutathione (GSH) and increased expression of glutathione S-transferase (GST) enzymes. Therefore, enhanced detoxification by the glutathione/glutathione S-transferase pathway has been proposed as a major factor in...article 1995
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Visser, C.J.T. (author), Meijers, M. (author), van Garderen-Hoetmer, A. (author), Klijn, J.G.M. (author), Foekens, J.A. (author), Woutersen, R.A. (author), Instituut CIVO-Toxicologie en Voeding TNO (author)The present 12-month study was carried out to investigate the effects of the aromatase inhibitor aminoglutethimide, alone and in combination with orchiectomy, on pancreatic carcinogenesis in azaserine-treated rats and N-nitrosobis(2-oxopropyl)amine-treated hamsters. Treatment of the animals started 4 months after the last injection with the...article 1995
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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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van Loon, A.A.W.M. (author), Raadsheer, F.C. (author), Timmerman, A.J. (author), Haanen, C. (author), Wessels, J. (author), van der Schans, G.P. (author), Lohmans, P.H.M. (author), Baan, R.A. (author), Medisch Biologisch Laboratorium TNO (author)Chemotherapy combined with total-body irradiation (TBI), a conditioning regimen for bone-marrow transplantation (BMT), causes lesions in the cellular DNA of the patients treated. To understand possible consequences of the DNA damage induced during such treatment, information is required about the nature of the damage, the level of induction and...article 1992
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Fichtinger-Schepman, A.M.J. (author), Velde van der - Visser, S.D. (author), Dijk van - Knijnenburg, H.C.M. (author), van Oosterom, A.T. (author), Baan, R.A. (author), Berends, F. (author), TNO Voeding Medisch biologisch laboratorium TNO (author)During chemotherapy with a cisplatin-containing combination of drugs, 217 blood samples from 30 cancer patients were analyzed for the presence of the main cisplatin-DNA adduct cis-Pt(NH3)2d(pGpG) (Pt-GG). Cisplatin was administered during 3-h infusions on each of 5 consecutive days, resulting in increasing adduct levels which, on the average,...article 1990
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Schreurs, W.H.P. (author), Odink, J. (author), Egger, R.J. (author), Wedel, M. (author), Bruning, P.F. (author), Instituut CIVO-Toxicologie en voeding TNO (author)Chemicals/CAS: Ascorbic Acid, 50-81-7; Calcifediol, 19356-17-3; Vitamin A, 11103-57-4; Vitamin B 12, 68-19-9; Vitamin E, 1406-18-4; Vitaminsarticle 1985
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Mattern, I.E. (author), Cocchiarella, L. (author), van Kralingen, C.G. (author), Lohman, P.H.M. (author), Medisch Biologisch Laboratorium TNO (author)Eleven platinum compounds with nitrogen donor ligands, previously tested for anti-tumour activity were studied for induction of prophage lambda and for mutagenicity in the Ames assay, with various strains of Salmonella. The compounds included cis and trans isomers of Pt(II) and Pt(IV) complexes and were tested with and without metabolic...article 1982
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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