Searched for: subject%3A%22Culture%255C%2Bmedium%22
(1 - 20 of 44)

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Adav, S.S. (author), Li, A.A. (author), Manavalan, A. (author), Punt, P. (author), Sze, S.K. (author), TNO Kwaliteit van Leven (author)
The natural lifestyle of Aspergillus niger made them more effective secretors of hydrolytic proteins and becomes critical when this species were exploited as hosts for the commercial secretion of heterologous proteins. The protein secretion profile of A. niger and its mutant at different pH was explored using iTRAQ-based quantitative proteomics...
article 2010
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Lu, Z.F. (author), Doulabi, B.Z. (author), Huang, C.L. (author), Bank, R.A. (author), Helder, M.N. (author), TNO Kwaliteit van Leven (author)
β1 integrins play a controversial role during chondrogenesis. Since the maturation of chondrocytes relies on a signaling switch from cell-cell to cell-matrix interactions, we hypothesized that β1 integrins play a different role at the earlier (mainly cell-cell interaction) from the later stage (mainly cell-matrix interaction) of chondrogenesis....
article 2008
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TNO Kwaliteit van Leven (author), Spaan, S. (author), Doekes, G. (author), Heederik, D. (author), Thorne, P.S. (author), Wouters, I.M. (author)
The measurement of airborne endotoxins is thus far not standardized. Earlier studies reported higher endotoxin yields when Tween 20 was added to the media used for filter extraction and in the Limulus amebocyte lysate (LAL) assay. This study compared four common media and assessed the effects of Tween during extraction and analysis separately....
article 2008
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Werf, M.J.v.d. (author), Overkamp, K.M. (author), Muilwijk, B. (author), Coulier, L. (author), Hankemeier, T. (author), TNO Kwaliteit van Leven (author)
Achieving metabolome data with satisfactory coverage is a formidable challenge in metabolomics because metabolites are a chemically highly diverse group of compounds. Here we present a strategy for the development of an advanced analytical platform that allows the comprehensive analysis of microbial metabolomes. Our approach started with in...
article 2007
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Steenvoorden, M.M.C. (author), Toes, R.E.M. (author), Ronday, H.K. (author), Huizinga, T.W.J. (author), de Groot, J. (author), TNO Kwaliteit van Leven (author)
Ligands for the receptor for advanced glycation endproducts (RAGE) are increased in RA synovial fluid (SF), serum and synovium. Since RAGE is present on fibroblast-like synoviocytes (FLS), the present study investigates whether the RAGE ligands HMGB-1 and AGEs are able to stimulate the characteristic, pathological invasive behaviour of these...
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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Kienhuis, A.S. (author), Wortelboer, H.M. (author), Hoflack, J.C. (author), Moonen, E.J. (author), Kleinjans, J.C.S. (author), van Ommen, B. (author), van Delft, J.H.M. (author), Stierum, R.H. (author), TNO Kwaliteit van Leven (author)
Sandwich-cultured primary rat hepatocytes are often used as an in vitro model in toxicology and pharmacology. However, loss of liver-specific functions, in particular, the decline of cytochrome P450 (P450) enzyme activity, limits the value of this model for prediction of in vivo toxicity. In this study, we investigated whether a hepatic in vitro...
article 2006
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Yuan, X.L. (author), Goosen, C. (author), Kools, H. (author), van der Maarel, M.J.E.C. (author), van den Hondel, C.A.M.J.J. (author), Dijkhuizen, L. (author), Ram, A.F.J. (author), TNO Kwaliteit van Leven (author)
As a soil fungus, Aspergillus niger can metabolize a wide variety of carbon sources, employing sets of enzymes able to degrade plant-derived polysaccharides. In this study the genome sequence of A. niger strain CBS 513.88 was surveyed, to analyse the gene/enzyme network involved in utilization of the plant storage polymer inulin, and of sucrose,...
article 2006
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Kapiteijn, K. (author), Koolwijk, P. (author), van der Weiden, R.M.F. (author), van Nieuw Amerongen, G. (author), Plaisier, M. (author), van Hinsbergh, V.W.M. (author), Helmerhorst, F.M. (author), TNO Kwaliteit van Leven (author)
Objective: Successful implantation and placentation depend on the interaction between the endometrium and the embryo. Angiogenesis is crucial at this time. In this article we investigate the direct influence of the human embryo on in vitro endometrial angiogenesis. Design: In vitro study. Setting: Human endometrial microvascular endothelial...
article 2006
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Jenniskens, Y.M. (author), Koevoet, W. (author), de Bart, A.C.W. (author), Weinans, H. (author), Jahr, H. (author), Verhaar, J.A.N. (author), de Groot, J. (author), van Osch, G.J.V.M. (author), TNO Kwaliteit van Leven (author)
Objective: Examine effects of insulin-like growth factor 1 (IGF1), transforming growth factor β2 (TGFβ2) and fibroblast growth factor 2 (FGF2) on proteoglycan and collagen network and biomechanical properties of the newly formed cartilage matrix. Methods: Bovine articular chondrocytes were cultured in alginate beads for 3 weeks with or without...
article 2006
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Mandelin, J. (author), Hukkanen, M. (author), Li, T.F. (author), Korhonen, M. (author), Liljeström, M. (author), Sillat, T. (author), Hanemaaijer, R. (author), Salo, J. (author), Santavirta, S. (author), Konttinen, Y.T. (author), TNO Kwaliteit van Leven (author)
Healthy bone is a rigid yet living tissue that undergoes continuous remodeling. Osteoclasts resorb bone in the remodeling cycle. They secrete H+-ions and proteinases to dissolve bone mineral and degrade organic bone matrix, respectively. One of the main collagenolytic proteinase in osteoclasts is cathepsin K, a member of papain family cysteine...
article 2006
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te Biesebeke, R. (author), Boussier, A. (author), van Biezen, N. (author), van den Hondel, C.A.M.J.J. (author), Punt, P.J. (author), TNO Kwaliteit van Leven (author)
Filamentous growth of Aspergillus oryzae on solid cereal substrates involves secretion of substrate converting enzymes and a solid substrate specific polarised hyphal growth phenotype. To identify proteins produced under these specific conditions, the extracts of A. oryzae grown on wheat-based media were analysed using N-terminal sequence...
article 2006
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TNO Kwaliteit van Leven (author), van Wezel, G.P. (author), Krabben, P. (author), Traag, B.A. (author), Keijser, B.J.F. (author), Kerste, R. (author), Vijgenboom, E. (author), Heijnen, J.J. (author), Kraal, B. (author)
Filamentous actinomycetes are commercially widely used as producers of natural products (in particular antibiotics) and of industrial enzymes. However, the mycelial lifestyle of actinomycetes, resulting in highly viscous broths and unfavorable pellet formation, has been a major bottleneck in their commercialization. Here we describe the...
article 2006
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TNO Kwaliteit van Leven (author), Uitterlinden, E.J. (author), Jahr, H. (author), Koevoet, J.L.M. (author), Jenniskens, Y.M. (author), Bierma-Zeinstra, S.M.A. (author), de Groot, J. (author), Verhaar, J.A.N. (author), Weinans, H. (author), van Osch, G.J.V.M. (author)
Objective: To investigate the effect of glucosamine (GlcN) in a human osteoarthritic explant model on expression of genes involved in anabolic and catabolic activities of chondrocytes. Methods: Human osteoarthritic explants, obtained during knee arthroplasty surgery, were pre-cultured (3 days) and treated with glucosamine-hydrochloride (GlcN-HCl...
article 2006
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te Biesebeke, R. (author), van Biezen, N. (author), de Vos, W.M. (author), van den Hondel, C.A.M.J.J. (author), Punt, P.J. (author), TNO Kwaliteit van Leven (author)
Solid-state fermentation (SSF) with Aspergillus oryzae results in high levels of secreted protein. However, control mechanisms of gene expression in SSF have been only poorly studied. In this study we show that both glucoamylase (glaB) and protease (alpA, nptB) genes are highly expressed during surface cultivation on wheat-based solid medium,...
article 2005
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Lamfers, M.L.M. (author), Gianni, D. (author), Tung, C.H. (author), Idema, S. (author), Schagen, F.H.E. (author), Carette, J.E. (author), Quax, P.H.A. (author), van Beusechem, V.W. (author), van der Top, W.P. (author), Dirven, C.M.F. (author), Chiocca, E.A. (author), Gerritsen, W.R. (author), TNO Kwaliteit van Leven (author)
Oncolytic adenoviruses exhibiting tumor-selective replication are promising anticancer agents. Insertion and expression of a transgene encoding tissue inhibitor of metalloproteinase-3 (TIMP-3), which has been reported to inhibit angiogenesis and tumor cell infiltration and induce apoptosis, may improve the antitumor activity of these agents. To...
article 2005
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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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Joosten, V. (author), Gouka, R.J. (author), van den Hondel, C.A.M.J.J. (author), Verrips, C.T. (author), Lokman, B.C. (author), TNO Kwaliteit van Leven TNO Voeding (author)
We report the expression and production of llama variable heavy-chain antibody fragments (VHHs) by Aspergillus awamori. Fragments encoding VHHs were cloned in a suitable Aspergillus expression vector and transformants secreting VHH fragments were analysed for integrated gene copy-numbers, mRNA levels and protein production. Functional V HHs were...
article 2005
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Pieterse, B. (author), Leer, R.J. (author), Schuren, F.H.J. (author), van der Werf, M.J. (author), TNO Kwaliteit van Leven (author)
The organic acid lactate is the predominant fermentation product of Lactobacillus plantarum. The undissociated form of this organic acid is a strong growth inhibitor for the organism. Different theories have been postulated to explain the inhibitory effects of lactic acid: (i) toxicity arising from the dissipation of the membrane potential, (ii)...
article 2005
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Ram, A.F.J. (author), Arentshorst, M. (author), Damveld, R.A. (author), van Kuyk, P.A. (author), Klis, F.M. (author), van den Hondel, C.A.M.J.J. (author), TNO Voeding (author)
Perturbation of cell wall synthesis in Saccharomyces cerevisiae, either by mutations in cell wall synthesis-related genes or by adding compounds that interfere with normal cell wall assembly, triggers a compensatory response to ensure cell wall integrity. This response includes an increase in chitin levels in the cell wall. Here it is shown that...
article 2004
Searched for: subject%3A%22Culture%255C%2Bmedium%22
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