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Blankvoort, B.M.G. (author), Rodenburg, R.J.T. (author), Murk, A.J. (author), Koeman, J.H. (author), Schilt, R. (author), Aarts, J.M.M.J.G. (author), TNO Kwaliteit van Leven (author)This paper describes the screening of 22 extracts from 18 different aquatic environmental samples for androgenic activity, including indirect and interactive effects on androgen receptor (AR)-mediated signal transduction, using the AR-LUX bioassay. Four samples, originating from an industrial wastewater treatment plant (WTP) or the river Meuse,...article 2005
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Lou, X. (author), van Buijtenen, J. (author), Bastiaansen, J.J.A.M. (author), de Waal, B.F.M. (author), Langeveld, B.M.W. (author), van Dongen, J.L.J. (author), TNO Industrie en Techniek (author)Matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOFMS) was applied to the analysis of Ru(OCOCF 3)2(CO)(PPh3)2, Ru(OCOC 3F7)2(CO)(PPh3)2, Ir(tBuppy)3 and Ir(ppy)2(acac) complexes. A troublesome problem in the MALDI-TOFMS characterization of these metal complexes is the possible replacement of complex ligands by...article 2005
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Meeuwsen, S. (author), Bsibsi, M. (author), Persoon-Deen, C. (author), Ravid, R. (author), van Noort, J.M. (author), TNO Preventie en Gezondheid (author)Objectives: Brain microglia are highly responsive cells in the central nervous system that exert key functions in host defense as well as in neuroprotection and regeneration. In this study the gene expression profiles for 268 cytokines, chemokines, growth factors and their receptors were examined in cultures of purified human adult microglia,...article 2005
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Espirito Santo, S.M.S. (author), Pires, N.M.M. (author), Boesten, L.S.M. (author), Gerritsen, G. (author), Bovenschen, N. (author), van Dijk, K.W. (author), Jukema, J.W. (author), Princen, H.M.G. (author), Bensadoun, A. (author), Li, W.P. (author), Herz, J. (author), Havekes, L.M. (author), van Vlijmen, B.J.M. (author), Gaubius Instituut TNO (author)The low-density lipoprotein (LDL) receptor-related protein (LRP) has a well-established role in the hepatic removal of atherogenic apolipoprotein E (APOE)-rich remnant lipoproteins from plasma. In addition, LRP recognizes multiple distinct pro- and antiatherogenic ligands in vitro. Here, we investigated the role of hepatic LRP in atherogenesis...article 2004
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Nagelkerken, L. (author), Haspels, I. (author), van Rijs, W. (author), Blauw, B. (author), Ferrant, J.L. (author), Hess, D.M. (author), Garber, E.A. (author), Taylor, F.R. (author), Burkly, L.C. (author), Gaubius Instituut TNO (author)It has been demonstrated that anti-CD154 mAb treatment effectively inhibits the development of experimental autoimmune encephalomyelitis (EAE). However, although it appears to prevent the induction of Th1 cells and reactivation of encephalitogenic T cells within the CNS, little information is available regarding the involvement of alternative...article 2004
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Hollestelle, S.C.G. (author), de Vries, M.R. (author), van Keulen, J.K. (author), Schoneveld, A.H. (author), Vink, A. (author), Strijder, C.F. (author), van Middelaar, B.J. (author), Pasterkamp, G. (author), Q́uax, P.H.A. (author), de Kleijn, D.P.V. (author), TNO Preventie en Gezondheid (author)Background-Toll-like receptor 4 (Tlr4) is the receptor for exogenous lipopolysaccharides (LPS). Expression of endogenous Tlr4 ligands, heat shock protein 60 (Hsp60) and extra domain A of fibronectin, has been observed in arthritic and oncological specimens in which matrix turnover is an important feature. In atherosclerosis, outward remodeling...article 2004
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Klaasse, E. (author), de Ligt, R.A.F. (author), Roerink, S.F. (author), Lorenzen, A. (author), Milligan, G. (author), Leurs, R. (author), IJzerman, A.P. (author), TNO Voeding (author)We studied fusion proteins between the human adenosine A1 receptor and different 351Cys-mutated Gi1 α-subunits (A1-Giα) with respect to two important concepts in receptor pharmacology, i.e. allosteric modulation and constitutive activity/inverse agonism. The aim of our study was twofold. We first analysed whether such fusion products are still...article 2004
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Smulders, C.J.G.M. (author), Bueters, T.J.H. (author), Vailati, S. (author), van Kleef, R.G.D.M. (author), Vijvergberg, H.P.M. (author)Chronic and acute exposure to organophosphate (OP) pesticides may lead to persistent neurological and neurobehavioral effects, which cannot be explained by acetylcholinesterase (AChE) inhibition alone. It is suggested that other brain proteins are involved. Effects of commonly used organophosphate pesticides on rat neuronal α4β2 nicotinic...article 2004
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Valencia, J.V. (author), Weldon, S.C. (author), Quinn, D. (author), Kiers, G.H. (author), de Groot, J. (author), TeKoppele, J.M. (author), Hughes, T.E. (author), Gaubius instituut TNO (author)Advanced glycation end products (AGEs) accumulate with age and at an accelerated rate in diabetes. AGEs bind cell-surface receptors including the receptor for advanced glycation end products (RAGE). The dependence of RAGE binding on specific biochemical characteristics of AGEs is currently unknown. Using standardized procedures and a variety of...article 2004
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Lopatinskaya, L. (author), Boxel van-Dezaire, A.H.H. (author), Barkhof, F. (author), Polman, C.H. (author), Lucas, C.J. (author), Nagelkerken, L. (author)In this longitudinal study, we examined the expression of Fas, FasL, CCR3, CCR5 and CXCR3 mRNA in peripheral blood mononuclear cells (PBMCs) of secondary progressive (SP) and relapsing-remitting (RR) multiple sclerosis (MS) patients. In RR patients, FasL, CCR3 and CCR5 mRNA levels were increased prior to the exacerbations, but these decreased...article 2003
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Neele, D.M. (author), de Wit, E.C.M. (author), Princen, H.M.G. (author), Gaubius instituut TNO (author)We have shown previously that retinoids induce apolipoprotein (apo) A-I gene expression in cultured cynomolgus hepatocytes and do not have an effect on apo B-100 synthesis. In the present study, the effect of retinoids on apolipoprotein(a) (apo(a)) synthesis in cultured hepatocytes was investigated. The addition of all-trans retinoic acid (at-RA...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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TNO Preventie en Gezondheid (author), Howard, L.M. (author), Miga, A.J. (author), Vanderlugt, C.L. (author), Dal Canto, M.C. (author), Laman, J.D. (author), Noelle, R.J. (author), Miller, S.D. (author)Relapsing experimental autoimmune encephalomyelitis (R-EAE) in the SJL mouse is a Th1-mediated autoimmune demyelinating disease model for human multiple sclerosis and is characterized by infiltration of the central nervous system (CNS) by Th1 cells and macrophages. Disease relapses are mediated by T cells specific for endogenous myelin epitopes...article 1999
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TNO Preventie en Gezondheid (author), van Noort, J.M. (author)Autoreactive T-cell responses directed to myelin proteins in the central nervous system are widely believed to be crucial in the pathology of multiple sclerosis (MS). However, effective ways of selectively targeting these T-cells in order to alter the clinical course of MS in a predictable manner has yet to be demonstrated. This review discusses...article 1999
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Laman, J.D. (author), de Boer, M. (author), 't Hart, B.A. (author), TNO Preventie en Gezondheid (author)The interactions of CD40 and CD40L have been known for some time to critically regulate B-cell responses with respect to proliferation, isotype switching, antibody production, and memory formation. More recent findings demonstrated that CD40 can be expressed on several other antigen-presenting cell (APC) types such as macrophages, dendritic...article 1998
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Laman, J.D. (author), Maassen, C.B.M. (author), Schellekens, M.M. (author), Visser, L. (author), Kap, M. (author), de Jong, E. (author), van Puijenbroek, M. (author), van Stipdonk, M.J.B. (author), van Meurs, M. (author), Schwärzler, C. (author), Günthert, U. (author), TNO Preventie en Gezondheid (author)Interactions between mononuclear cells are required for the formation of inflammatory infiltrates in the CNS and the activation of cellular effector functions provoking demyelination in MS. Membrane-expressed costimulatory molecules are crucial to such interactions. We therefore investigated whether two costimulatory molecules, CD40L (CD154,...article 1998
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Quax, P.H.A. (author), Grimbergen, J.M. (author), Lansink, M. (author), Bakker, A.H.F. (author), Blatter, M.C. (author), Belin, D. (author), van Hinsbergh, V.W.M. (author), Verheijen, J.H. (author), Gaubius Instituut TNO (author)Urokinase-type plasminogen activator (UPA), particularly when bound to its receptor (UPAR), is thought to play a major role in local proteolytic processes, thus facilitating cell migration as may occur during angiogenesis, neointima and atherosclerotic plaque formation, and tumor cell invasion. To facilitate understanding of the need and...article 1998
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Vyth-Dreese, F.A. (author), Boot, H. (author), Dellemijn, T.A.M. (author), Majoor, D.M. (author), Oomen, L.C.J.M. (author), Laman, J.D. (author), van Meurs, M. (author), de Weger, R.A. (author), de Jong, D. (author), TNO Preventie en Gezondheid (author)Costimulatory molecules are essential in cognate interactions between T and B lymphocytes. To study the prerequisites of functional interactions between malignant B cells and intermingled T cells in B-cell non-Hodgkin's lymphomas (B-NHL), we examined the expression of CD40, CD80 and CD86 and their ligands CD40 ligand (CD40L, CD154), CD28 and...article 1998
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Laman, J.D. (author), van Meurs, M. (author), de Smet, B.J.G.L. (author), Schoneveld, A. (author), TNO Preventie en Gezondheid (author)The abundant presence of macrophages and activated T cells in atherosclerotic plaques suggests an active involvement of the immune system in this cardiovascular disease. However, insight into cellular interactions inducing relevant effector functions is still limited. Here, Jon Laman and colleagues propose that local interactions between CD40...article 1997
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Gaubius Instituut TNO Centraal Instituut voor Voedingsonderzoek TNO TNO Voeding (author), Kaptein, A. (author), Neele, D.M. (author), Twisk, J. (author), Hendriks, H.F.J. (author), Kooistra, T. (author), Princen, H.M.G. (author)We showed previously that retinoids stimulate apolipoprotein A-I (apoA- I) synthesis in cultured cynomolgus hepatocytes only after a 24-h lag phase. Here we report on the biochemical background of the slow response, the requirement for high retinoic acid concentrations, and the involvement of different retinoid receptors. The time course of the...article 1997