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Transcriptional activity around bacterial cell death reveals molecular biomarkers for cell viabilityTNO Kwaliteit van Leven (author), Kort, R. (author), Keijser, B.J. (author), Caspers, M.P.M. (author), Schuren, F.H. (author), Montijn, R. (author)Background: In bacteriology, the ability to grow in selective media and to form colonies on nutrient agar plates is routinely used as a retrospective criterion for the detection of living bacteria. However, the utilization of indicators for bacterial viability-such as the presence of specific transcripts or membrane integrity-would overcome bias...article 2008
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TNO Kwaliteit van Leven (author), Bastiaansen-Jenniskens, Y.M. (author), Koevoet, W. (author), de Bart, A.C.W. (author), Zuurmond, A.M. (author), Bank, R.A. (author), Verhaar, J.A.N. (author), de Groot, J. (author), van Osch, G.J.V.M. (author)Transforming growth factor beta (TGFbeta) is often used in cartilage tissue engineering to increase matrix formation by cells with various phenotypes. However, adverse effects of TGFbeta, such as extensive cross-linking in cultured fibroblasts, have also been reported. Our goal was to study effects of TGFbeta on collagen cross-linking and...article 2008
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TNO Kwaliteit van Leven (author), Madsen, L. (author), Pedersen, L.M. (author), Liaset, B. (author), Ma, T. (author), Petersen, R.K. (author), van den Berg, S. (author), Pan, J. (author), Müller-Decker, K.M. (author), Dülsner, E.D. (author), Kleemann, R. (author), Kooistra, T. (author), Døskeland, S.O. (author), Kristiansen, K. (author)The effect of n-6 polyunsaturated fatty acids (n-6 PUFAs) on adipogenesis and obesity is controversial. Using in vitro cell culture models, we show that n-6 PUFAs was pro-adipogenic under conditions with base-line levels of cAMP, but anti-adipogenic when the levels of cAMP were elevated. The anti-adipogenic action of n-6 PUFAs was dependent on a...article 2008
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TNO Informatie- en Communicatietechnologie (author), Dimitrova, D.C. (author), Heijenk, G. (author), van den Berg, J.L. (author), Litjens, R. (author)The UMTS Enhanced Uplink (EUL) is expected to provide higher capacity, increased data rates, and smaller latency on the communication link from users towards the network. A key mechanism in EUL traffic handling is the packet scheduler, for which a number of basic schemes can be identified (one-by-one, partial parallel, and full parallel). In...conference paper 2008
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Jeurissen, S.M.F. (author), Claassen, F.W. (author), Havlik, J. (author), Bouwmans, E.E. (author), Cnubben, N.H.P. (author), Sudhölter, E.J.R. (author), Rietjens, I.M.C.M. (author), van Beek, T.A. (author), TNO Kwaliteit van Leven (author)An on-line HPLC screening method for detection of inhibitors of human cytochrome P450 1A2 in extracts was developed. HPLC separation of extracts is connected to a continuous methoxyresorufin-O-demethylation (MROD) assay in which recombinant human P450 1A2 converts methoxyresorufin to its fluorescent metabolite resorufin. The system was tested...article 2007
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van der Kaaij, R.M. (author), Yuan, X.L. (author), Franken, A. (author), Ram, A.F.J. (author), Punt, P.J. (author), van der Maarel, M.J.E.C. (author), Dijkhuizen, L. (author), TNO Kwaliteit van Leven (author)In the genome sequence of Aspergillus niger CBS 513.88, three genes were identified with high similarity to fungal α-amylases. The protein sequences derived from these genes were different in two ways from all described fungal α-amylases: they were predicted to be glycosylphosphatidylinositol anchored, and some highly conserved amino acids of...article 2007
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Kienhuis, A.S. (author), Wortelboer, H.M. (author), Maas, W.J. (author), van Herwijnen, M. (author), Kleinjans, J.C.S. (author), van Delft, J.H.M. (author), Stierum, R.H. (author), TNO Kwaliteit van Leven (author)A rapid decline of cytochrome P450 (CYP450) enzyme activities remains a drawback of rat hepatocyte-based in vitro cultures. Consequently, judgment of the toxic potential of compounds that need bioactivation by CYP450s may not be adequate using this model. In the present study, an improved hepatocyte-based in vitro system was developed with...article 2007
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Wierenga, P.A. (author), Egmond, M.R. (author), Voragen, A.G.J. (author), de Jongh, H.H.J. (author), TNO Kwaliteit van Leven (author)Unfolding of proteins has often been mentioned as an important factor during the adsorption process at air-water interfaces and in the increase of surface pressure at later stages of the adsorption process. This work focuses on the question whether the folding state of the adsorbed protein depends on the rate of adsorption to the interface,...article 2006
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Zadelaar, A.S.M. (author), Boesten, L.S.M. (author), Pires, N.M.M. (author), van Nieuwkoop, A. (author), Biessen, E.A.L. (author), Jukema, W. (author), Havekes, L.M. (author), van Vlijmen, B.J.M. (author), van Dijk, K.W. (author), TNO Kwaliteit van Leven (author)Here we describe a means to conditionally modify genes at a predefined and localized region of the vasculature using a perivascular drug delivery device (PDD). A 4-hydroxytamoxifen (4-OHT)-eluting PDD was applied around the carotid or femoral artery of a mouse strain carrying both the tamoxifen-inducible and smooth muscle cell (SMC)-specific Cre...article 2006
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TNO Kwaliteit van Leven (author), Sluijter, J.P.G. (author), Pulskens, W.P.C. (author), Schoneveld, A.H. (author), Velema, E. (author), Strijder, C.F. (author), Moll, F. (author), de Vries, J.P. (author), Verheijen, J. (author), Hanemaaijer, R. (author), de Kleijn, D.P.V. (author), Pasterkamp, G. (author)Background and Purpose - We studied matrix metalloproteinases (MMP) 2, 8, and 9 and extracellular matrix metalloproteinase inducer (EMMPRIN) levels in relation to carotid atherosclerotic plaque characteristics. Methods - Carotid atherosclerotic plaques (n=150) were stained and analyzed for the presence of collagen, smooth muscle cell (SMC), and...article 2006
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Joosten, V. (author), Roelofs, M.S. (author), van den Dries, N. (author), Goosen, T. (author), Verrips, C.T. (author), van den Hondel, C.A.M.J.J. (author), Lokman, B.C. (author), TNO Kwaliteit van Leven (author)The Arthromyces ramosus peroxidase gene (arp) was genetically fused to either the 5′- or 3′-terminal ends of the gene encoding llama variable heavy chain antibody fragment VHH R9, resulting in the fusion expression cassettes ARP-R9 or R9-ARP. Aspergillus awamori transformants were obtained which produced up to 30 mg l-1 fusion protein in the...article 2005
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Time-lapse tracking of barley androgenesis reveals position-determined cell death within pro-embryosMaraschin, S.D.F. (author), Vennik, M. (author), Lamers, G.E.M. (author), Spaink, H.P. (author), Wang, M. (author)Following abiotic stress to induce barley (Hordeum vulgare L.) androgenesis, the development of 794 enlarged microspores in culture was monitored by time-lapse tracking. In total, 11% of the microspores tracked developed into embryo-like structures (type-I pathway), 36% formed multicellular structures (type-II pathway) and 53% of the microspores...article 2005
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Maraschin, S.D.F. (author), Gaussand, G. (author), Pulido, A. (author), Olmedilla, A. (author), Lamers, G.E.M. (author), Korthout, H. (author), Spaink, H.P. (author), Wang, M. (author)Androgenesis represents one of the most fascinating examples of cell differentiation in plants. In barley, the conversion of stressed uninucleate microspores into embryo-like structures is highly efficient. One of the bottlenecks in this process is the successful release of embryo-like structures out of the exine wall of microspores. In the...article 2005
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Nelson, G. (author), Kozlova-Zwinderman, O. (author), Collis, A.J. (author), Knight, M.R. (author), Fincham, J.R.S. (author), Stanger, C.P. (author), Renwick, A. (author), Hessing, J.G.M. (author), Punt, P.J. (author), van den Hondel, C.A.M.J.J. (author), Read, N.D. (author), TNO Voeding Centraal Instituut voor Voedingsonderzoek TNO (author)Calcium signalling is little understood in filamentous fungi largely because easy and routine methods for calcium measurement in living hyphae have previously been unavailable. We have developed the recombinant aequorin method for this purpose. High levels of aequorin expression were obtained in Neurospora crassa, Aspergillus niger and...article 2004
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Beauchamp, N.J. (author), van Achterberg, T.A.E. (author), Engelse, M.A. (author), Pannekoek, H. (author), de Vries, C.J.M. (author), Gaubius Instituut TNO (author)Migration and proliferation of vascular smooth muscle cells (SMCs) are key events in atherosclerosis. However, little is known about alterations in gene expression upon transition of the quiescent, contractile SMC to the proliferative SMC. We performed serial analysis of gene expression (SAGE) of cultured, human SMCs, either grown under resting...article 2003
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Stierum, R. (author), Gaspari, M. (author), Dommels, Y. (author), Ouatas, T. (author), Pluk, H. (author), Jespersen, S. (author), Vogels, J. (author), Verhoeckx, K. (author), Groten, J. (author), van Ommen, B. (author)Here, we describe a proteomics approach to study protein expression changes in differentiating Caco-2 cells. Caco-2 is a colorectal carcinoma cell line, which upon differentiation loses its tumorigenic phenotype and displays characteristics of mature enterocytes, including brush borders with microvilli. Cells were grown in culture flasks and...article 2003
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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
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Abeyama, K. (author), Eng, W. (author), Jester, J.V. (author), Vink, A.A. (author), Edelbaum, D. (author), Cockerell, C.J. (author), Bergstresser, P.R. (author), Takashima, A. (author)Exposure of skin to ultraviolet (UV) radiation is known to induce NF-κB activation, but the functional role for this pathway in UV-induced cutaneous inflammation remains uncertain. In this study, we examined whether experimentally induced sunburn reactions in mice could be prevented by blocking UV-induced, NF-κB-dependent gene transactivation...article 2000
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Dormans, J.A.M.A. (author), Steerenberg, P.A. (author), Arts, J.H.E. (author), van Bree, L. (author), de Klerk, A. (author), Verlaan, A.P.J. (author), Bruijntjes, J.P. (author), Beekhof, P. (author), van Soolingen, D. (author), van Loveren, H. (author), Centraal Instituut voor Voedingsonderzoek TNO (author)In this study the effects of inhalatory exposure to coal fly ash on lung pathology and the immune system in rats were examined. Rats were exposed to 0, 10, 30, or 100 mg/m3 coal fly ash (6 h/day, 5 days/wk) for 4 wk, or to 0 and 100 mg/m3 for 1 wk, and for 1 wk followed by a recovery in clean air of 3 wk. A concentration-related increase in lung...article 1999
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TeKoppele, J.M. (author), Beekman, B. (author), Verzijl, N. (author), Koopman, J.L. (author), de Groot, J. (author), Bank, R.A. (author), Gaubius Instituut TNO (author)Doxycycline (DOX) profoundly inhibited collagen synthesis by differentiated articular chondrocytes. At 25 microM, the rate of collagen synthesis was suppressed by more than 50% without affecting cell proliferation (DNA levels) and general protein synthesis (35S-Met and 35S-Cys incorporation). Steady-state mRNA levels of type II collagen were...article 1998