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Sandbæk, G. (author), Bjørnsen, S. (author), Sobel, J.H. (author), Nieuwenhuizen, W. (author), Matsueda, G. (author), Brosstad, F. (author), Gaubius Instituut TNO (author)The aim of this study was to characterize soluble fibrin(ogen) species in human, arterial, in-vivo-formed thrombi, using the immunoblotting technique. Specimens were collected via intra-arterial catheters in six patients scheduled for catheter-directed thrombolysis. Unreduced and reduced samples of the supernatants from the arterial thrombi...article 2000
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van Bladeren, P.J. (author), Centraal Instituut voor Voedingsonderzoek TNO (author)In general, glutathione conjugation is regarded as a detoxication reaction. However, depending on the properties of the substrate, bioactivation is also possible. Four types of activation reaction have been recognized: direct-acting compounds, conjugates that are activated through cysteine conjugate beta-lyase, conjugates that are activated...article 2000
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Jong, M.C. (author), Hendriks, W.L. (author), van Vark, L.C. (author), Dahlmans, V.E.H. (author), Groener, J.E.M. (author), Havekes, L.M. (author), Gaubius instituut TNO (author)The present study examined the relative contributions of the different pathways by which oxidatively modified VLDL (oxVLDL) promotes the uptake and intracellular accumulation of lipids in J774 macrophages. VLDL was oxidized for a maximum of 4 hours, resulting in an increase in thiobarbituric acid- reactive substances and an increased...article 2000
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Dorrepaal, C.A. (author), van Bel, F. (author), Steendijk, P. (author), Shadid, M. (author), van de Velde, E.T. (author), Baan, J. (author), TNO Preventie en Gezondheid (author)The aim of the present study was to investigate the effect of immediate post-hypoxic-ischemic (HI) inhibition of nitric oxide synthesis by N(ω)- nitro-L-arginine (NLA) on cardiac function and reactive oxygen species production. Fifteen newborn lambs were subjected to severe HI. Upon resuscitation 5 received 10 mg NLA/kg, 4 40 mg NLA/kg and 6 a...article 2000
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Centraal Instituut voor Voedingsonderzoek TNO TNO Voeding (author), van der Werf, M.J. (author), Keijzer, P.M. (author), van der Schaft, P.H. (author)Xanthobacter sp. C20 was isolated from sediment of the river Rhine using cyclohexane as sole source of carbon and energy. Xanthobacter sp. C20 converted both enantiomers of limonene quantitatively into limonene-8,9-epoxide, a not previously described bioconversion product of limonene. With (4R)-limonene, (4R,8R)-limonene-8,9-epoxide was formed...article 2000
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TNO Preventie en Gezondheid (author), Huisman, J.G. (author), Carotenuto, A. (author), Labrijn, A.F. (author), Papavoine, C.H.M. (author), Laman, J.D. (author), Schellekens, M.M. (author), Koppelman, M.H.G.M. (author), Hilbers, C.W. (author)To identify structural constraints and amino acid sequences important for antibody recognition of the third variable domain (V3) of HIV-1 gp120, we have studied the solution conformation of three 35-mer circular V3 loop peptides derived from HIV-1 strains which differ in syncytium- (SI) and non-syncytium-inducing (NSI) capacity. In addition to...article 2000
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van den Nieuwendijk, A.M.C.H. (author), Benningshof, J.C.J. (author), Wegmann, V. (author), Bank, R.A. (author), te Koppele, J.M. (author), Brussee, J. (author), van der Gen, A. (author), TNO Preventie en Gezondheid (author)A new synthetic route to reduced collagen crosslinks (LNL and HLNL) is described in this report. It enables an enantioselective synthesis of LNL. HLNL was obtained as a mixture of two diastereoisomers. This method also provides the possibility to introduce radio-labels during the synthesis.article 1999
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Pasman, W.J. (author), Muls, G. (author), Vansant, G. (author), Westerterp-Plantenga, M.S. (author), Saris, W.H.M. (author), TNO Voeding Centraal Instituut voor Voedingsonderzoek TNO (author)OBJECTIVE: To investigate the effect of exercise training and dietary macronutrient composition on 24 h substrate oxidation in male, obese subjects. DESIGN: A 16 month exercise intervention study was executed, including a weight loss period with a very low energy diet (VLED) for 2 months at the start of the study. SUBJECTS: Twelve male, obese...article 1999
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van de Vijver, L.P.L. (author), Weber, C. (author), Kardinaal, A.F.M. (author), Grobbee, D.E. (author), Princen, H.M.G. (author), van Poppel, G. (author), Centraal Instituut voor Voedingsonderzoek TNO TNO Voeding (author)Coenzyme Q10 (CoQ10) is an important mitochondrial electron transfer component and has been postulated to function as a powerful antioxidant protecting LDL from oxidative damage. It could thus reduce the risk of cardiovascular disease. Thus far, beneficial effects of supplementation with CoQ10 have been reported. To study the relation between...article 1999
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van Baar, B.L.M. (author), Hulst, A.G. (author), Wils, E.R.J. (author), TNO Prins Maurits Laboratory, P.O. Box 45, 2280 AA, Rijswijk, Netherlands (author)Cholera toxin, one of the toxins that may be generated by various strains of the bacterium Vibrio cholerae, can be considered as a substance possibly used in biological warfare. The possibilities of characterising the toxin by liquid chromatography electrospray mass spectrometry (LC-ES-MS) were investigated. The toxin can be detected by flow...article 1999
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Centraal Instituut voor Voedingsonderzoek TNO (author), Pierik, A.J. (author), Roseboom, W. (author), Happe, R.P. (author), Bagley, K.A. (author), Albracht, S.P.J. (author)Infrared-spectroscopic studies on the [NiFe]-hydrogenase of Chromatium vinosum-enriched in 15N or 13C, as well as chemical analyses, show that this enzyme contains three non-exchangeable, intrinsic, diatomic molecules as ligands to the active site, one carbon monoxide molecule and two cyanide groups. The results form an explanation for the three...article 1999
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Bessems, J.G.M. (author), de Groot, M.J. (author), Baede, E.J. (author), te Koppele, J.M. (author), Vermeulen, N.P.E. (author), Centraal Instituut voor Voedingsonderzoek TNO (author)1. The formation of free radicals during enzyme catalysed oxidation of eight 3,5-disubstituted analogues of paracetamol (PAR) has been studied. A simple peroxidase system as well as cytochrome P450-containing systems were used. Radicals were detected by electron spin resonance (ESR) on incubation of PAR and 3,5-diCH3-, 3,5-diC2H5-, 3,5-ditC4H9-,...article 1998
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van de Vijver, L.P.L. (author), Kardinaal, A.F.M. (author), van Duyvenvoorde, W. (author), Kruijssen, D.A.C.M. (author), Grobbee, D.E. (author), van Poppel, G. (author), Princen, H.M.G. (author), TNO Preventie en Gezondheid (author)Accumulated evidence indicates that oxidative modification of LDL plays an important role in the atherogenic process. Therefore, we investigated the relation between coronary atherosclerosis and susceptibility of LDL to oxidation in a case-control study in men between 45 and 80 years of age. Case subjects and hospital control subjects were...article 1998
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Princen, H.M.G. (author), van Duyvenvoorde, W. (author), Buytenhek, R. (author), Blonk, C. (author), Tijburg, L.B.M. (author), Langius, J.A.E. (author), Meinders, A.E. (author), Pijl, H. (author), Gaubius Instituut TNO (author)Intake of flavonoids is associated with a reduced cardiovascular risk. Oxidation of LDL is a major step in atherogenesis, and antioxidants may protect LDL from oxidation. Because tea is an important source of flavonoids which are strong antioxidants, we have assessed in a randomized, placebo-controlled study the effect of consumption of black...article 1998
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Effect of methylglyoxal on the physico-chemical and biological properties of low-density lipoproteinSchalkwijk, C.G. (author), Vermeer, M.A. (author), Stehouwer, C.D.A. (author), te Koppele, J. (author), Princen, H.M.G. (author), van Hinsbergh, V.W.M. (author), Gaubius Instituut TNO (author)In patients with diabetes, non-enzymatic glycation of low-density lipoprotein (LDL) has been suggested to be involved in the development of atherosclerosis. α-Dicarbonyl compounds were identified as intermediates in the non-enzymatic glycation and increased levels were reported in patients with diabetes. We studied the effect of the α-dicarbonyl...article 1998
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Centraal Instituut voor Voedingsonderzoek TNO (author), van Hylckama Vlieg, J.E.T. (author), Kingma, J. (author), van den Wijngaard, A.J. (author), Janssen, D.B. (author)Rhodococcus sp. strain AD45 was isolated from an enrichment culture on isoprene (2-methyl-1,3-butadiene). Isoprene-grown cells of strain AD45 oxidized isoprene to 3,4-epoxy-3-methyl-1-butene, cis-1,2-dichloroethene to cis-1,2-dichloroepoxyethane, and trans-1,2-dichloroethene to trans-1,2- dichloroepoxyethane. Isoprene-grown cells also degraded...article 1998
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- van de Vijver, L.P.L. (author), van Duyvenvoorde, W. (author), Buytenhek, R. (author), van der Laarse, A. (author), Kardinaal, A.F.M. (author), van den Berg, H. (author), Princen, H.M.G. (author) article 1997
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Brussaard, H.E. (author), Leuven, J.A.G. (author), Kluft, C. (author), Krans, H.M.J. (author), van Duyvenvoorde, W. (author), Buytenhek, R. (author), van der Laarse, A. (author), Princen, H.M.G. (author), TNO Preventie en Gezondheid (author)In type II diabetes mellitus the altered hormonal state after menopause may represent an additional cardiovascular risk factor. Estrogen replacement therapy (ERT) is associated with a decreased cardiovascular risk, at least in nondiabetic post-menopausal women. We studied the effect of ERT on plasma lipids and lipoproteins and on LDL oxidation...article 1997
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Bessems, J.G.M. (author), te Koppele, J.M. (author), van Dijk, P.A. (author), van Stee, L.L.P. (author), Commandeur, J.N.M. (author), Vermeulen, N.P.E. (author), Leiden/Amsterdam Ctr. for Drug Res., Division of Molecular Toxicology, Vrije Universiteit, De Boelelaan 1083, 1081 HV Amsterdam, Netherlands Dept. Vasc. Connective Tissue Res TNO Preventie en Gezondheid (author)1. The cytochrome P450-dependent binding of paracetamol and a series of 3,5-disubstituted paracetamol analogues (R = -F, -Cl, -Br, -I, -C(H)3, -C2H5, -iC3H7) have been determined with β-naphthoflavone (βNF)-induced rat liver microsomes and produced reverse type I spectral changes. K(s,app) varied from 0.14 mM for 3,5-diiC3H7-paracetamol to 2.8...article 1996
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Stigter, E.C.A. (author), de Jong, G.A.H. (author), Jongejan, J.A. (author), Duine, J.A. (author), van der Lugt, J.P. (author), Somers, W.A.C. (author), TNO Voeding (author)A quinohemoprotein alcohol dehydrogenase (QH-EDH) from Comamonas testosteroni was immobilized on an electrode in a redox polymer network consisting of a polyvinylpyridine partially N-complexed with osmiumbis-(bipyridine)chloride. The enzyme effectively transfers electrons to the electrode via the polymer. An average maximum catalytic current of...article 1996