Searched for: subject:"enzymology"
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Meijnen, J.P. (author), de Winde, J.H. (author), Ruijssenaars, H.J. (author)
The oxidative D-xylose catabolic pathway of Caulobacter crescentus, encoded by the xylXABCD operon, was expressed in the gram-negative bacterium Pseudomonas putida S12. This engineered transformant strain was able to grow on D-xylose as a sole carbon source with a biomass yield of 53% (based on g [dry weight] g D-xylose-1) and a maximum growth...
article 2009
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Abdul-Hussien, H. (author), Hanemaaijer, R. (author), Verheijen, J.H. (author), van Bockel, J.H. (author), Geelkerken, R.H. (author), Lindeman, J.H.N. (author), TNO Kwaliteit van Leven (author)
Background: Matrix metalloproteinase-9 (MMP-9) is thought to play a central role in abdominal aortic aneurysm (AAA) initiation. Doxycycline, a tetracycline analogue, has direct MMP-9-inhibiting properties in vitro, and it effectively suppresses AAA development in rodents. Observed inhibition of AAA progression, and contradictory findings in...
article 2009
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Adourian, A. (author), Jennings, E. (author), Balasubramanian, R. (author), Hines, W.M. (author), Damian, D. (author), Plasterer, T.N. (author), Clish, C.B. (author), Stroobant, P. (author), McBurney, R. (author), Verheij, E.R. (author), Bobeldijk, I. (author), van der Greef, J. (author), Lindberg, J. (author), Kenne, K. (author), Andersson, U. (author), Hellmold, H. (author), Nilsson, K. (author), Salter, H. (author), Schuppe-Koistinen, I. (author), TNO Kwaliteit van Leven (author)
High-throughput biomolecular profiling techniques such as transcriptomics, proteomics and metabolomics are increasingly being used in in vivo studies to recognize and characterize effects of xenobiotics on organs and systems. Of particular interest are biomarkers of treatment-related effects which are detectible in easily accessible biological...
article 2008
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Beulens, J.W.J. (author), van den Berg, R. (author), Kok, F.J. (author), Helander, A. (author), Vermunt, S.H.F. (author), Hendriks, H.F.J. (author), TNO Kwaliteit van Leven (author)
Background and aims: To investigate the effect of moderate alcohol consumption on lipoprotein-associated phospholipase A2 activity, markers of inflammation and oxidative stress and whether these effects are modified by BMI. Methods and results: Eleven lean (BMI: 18.5-25 kg/m2) and 9 overweight (BMI > 27 kg/m2) men participated in a randomized...
article 2008
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Meyer, F.J. (author), Burnand, K.G. (author), Abisi, S. (author), TeKoppele, J.M. (author), van Els, B. (author), Smith, A. (author), TNO Kwaliteit van Leven (author)
Background: The presence of fibrous tissue in poorly healing venous leg ulcers suggests abnormal collagen metabolism. The aim was to determine whether there were differences in collagen turnover and matrix metalloproteinase (MMP) activity between ulcers that healed, those that did not heal and normal skin. Methods: Biopsies were taken from the...
article 2008
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Henneman, S. (author), Bildt, M.M. (author), de Groot, J. (author), Kuijpers-Jagtman, A.M. (author), Von den Hoff, J.W. (author)
The main cells in the periodontal ligament (PDL) are the fibroblasts, which play an important role in periodontal remodelling. Matrix metalloproteinases (MMPs) are largely responsible for the degradation of extracellular matrix proteins in the PDL. Previous studies have indicated that MMP production can be stimulated by the hormone relaxin. This...
article 2008
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Sier, C.F.M. (author), Hawinkels, L.J.A.C. (author), Zijlmans, H.J.M.A.A. (author), Zuidwijk, K. (author), Muller, E.S.M. (author), Ferreira, V. (author), Hanemaaijer, R. (author), Mulder-Stapel, A.A. (author), Kenter, G.G. (author), Verspaget, H.W. (author), Gorter, A. (author), TNO Kwaliteit van Leven (author)
Over-expression of matrilysin (MMP-7) is predominantly associated with epithelial (pre)malignant cells. In the present study MMP-7 expression is also found in endothelial cells in various human cancer types. Endothelial MMP-7 was associated with CD34 and/or CD105 expression. These immunohistochemical data were confirmed by RT-PCR on VEGF...
article 2008
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Goosen, C. (author), Yuan, X.L. (author), van Munster, J.M. (author), Ram, A.F.J. (author), van der Maarel, M.J.E.C. (author), Dijkhuizen, L. (author), TNO Kwaliteit van Leven (author)
A novel subfamily of putative intracellular invertase enzymes (glycoside hydrolase family 32) has previously been identified in fungal genomes. Here, we report phylogenetic, molecular, and biochemical characteristics of SucB, one of two novel intracellular invertases identified in Aspergillus niger. The sucB gene was expressed in Escherichia...
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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Houben, E. (author), Uchida, Y. (author), Nieuwenhuizen, W.F. (author), de Paepe, K. (author), Vanhaecke, T. (author), Holleran, W.M. (author), Rogiers, V. (author), TNO Kwaliteit van Leven (author)
It has recently become evident that at least five ceramidase (CDase) isoforms are present in human epidermis, and that specifically acidic CDase (aCDase) and alkaline CDase (alkCDase) activities increase during keratinocyte differentiation, and thus might play a pivotal role(s) in permeability barrier function. Prior to investigating their...
article 2007
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Korsheninnikova, E. (author), Voshol, P.J. (author), Baan, B. (author), van der Zon, G.C.M. (author), Havekes, L.M. (author), Romijn, J.A. (author), Maassen, J.A. (author), Ouwens, D.M. (author), TNO Kwaliteit van Leven (author)
Insulin is an important regulator of hepatic carbohydrate, lipid, and protein metabolism, and the regulation of these processes by insulin is disturbed under conditions of insulin resistance and type 2 diabetes. Despite these alterations, the impact of insulin resistance on insulin signalling in the liver is not well defined. Variations in time...
article 2007
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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), TNO Kwaliteit van Leven (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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Meijster, T. (author), Tielemans, E. (author), de Pater, N. (author), Heederik, D. (author), TNO Kwaliteit van Leven (author)
Introduction: Recent studies have shown that even low exposure levels to flour dust and related allergens can cause severe respiratory symptoms. In The Netherlands the Dutch government and responsible branch organizations [from bakeries (traditional & industrial), flour mills and bakery ingredient producers] signed a covenant to reduce exposure...
article 2006
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Beklen, A. (author), Tüter, G. (author), Sorsa, T. (author), Hanemaaijer, R. (author), Virtanen, I. (author), Tervahartiala, T. (author), Konttinen, Y.T. (author)
Activated matrix metalloproteinase-3 (MMP-3) can contribute to periodontal ligament destruction in adult periodontitis. Since MMP-3 has been reported to activate proMMP-8 and -9, it was speculated that gingival tissue fibroblast-derived MMP-3 might, in periodontitis, be responsible for activation of gingival crevicular fluid (GCF) neutrophil...
article 2006
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Duivenvoorden, I. (author), Voshol, P.J. (author), Rensen, P.C.N. (author), van Duyvenvoorde, W. (author), Romijn, J.A. (author), Emeis, J.J. (author), Havekes, L.M. (author), Nieuwenhuizen, W.F. (author), TNO Kwaliteit van Leven (author)
Background: The prevalence of dyslipidemia and obesity resulting from excess energy intake and physical inactivity is increasing. The liver plays a pivotal role in systemic lipid homeostasis. Effective, natural dietary interventions that lower plasma lipids and promote liver health are needed. Objective: Our goal was to determine the effect of...
article 2006
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Post, S.M. (author), Groenendijk, M. (author), van der Hoogt, C.C. (author), Fievet, C. (author), Luc, G. (author), Hoekstra, M. (author), Princen, H.M.G. (author), Staels, B. (author), Rensen, P.C.N. (author), TNO Kwaliteit van Leven (author)
OBJECTIVE - High-density lipoprotein (HDL) plays a key role in protection against development of atherosclerosis by reducing inflammation, protecting against LDL oxidation, and promoting reverse cholesterol transport from peripheral tissues to the liver for secretion into bile. Cholesterol 7α-hydroxylase (Cyp7a1) catalyzes the rate-limiting step...
article 2006
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Zuurmond, A.M. (author), Slot van der-Verhoeven, A.J. (author), van Dura, E.A. (author), de Groot, J. (author), Bank, R.A. (author), TNO Kwaliteit van Leven (author)
Collagen deposits in fibrotic lesions often display elevated levels of hydroxyallysine (pyridinoline) cross-links. The relation between the occurrence of pyridinoline cross-links and the irreversibility of fibrosis suggests that these cross-links contribute to the aberrant accumulation of collagen. Based on its inhibitory effect on lysyl...
article 2005
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van der Slot, A.J. (author), van Dura, E.A. (author), de Wit, E.C. (author), de Groot, J. (author), Huizinga, T.W.J. (author), Bank, R.A. (author), Zuurmond, A.M. (author), TNO Preventie en Gezondheid (author)
The hallmark of fibrosis is the excessive accumulation of collagen. The deposited collagen contains increased pyridinoline cross-link levels due to an overhydroxylation of lysine residues within the collagen telopeptides. Lysyl hydroxylase 2b (LH2b) is the only lysyl hydroxylase consistently up-regulated in several forms of fibrosis, suggesting...
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
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Al-Sheikh, H. (author), Watson, A.J. (author), Lacey, G.A. (author), Punt, P.J. (author), MacKenzie, D.A. (author), Jeenes, D.J. (author), Pakula, T. (author), Penttilä, M. (author), Alcocer, M.J.C. (author), Archer, D.B. (author), TNO Voeding (author)
We describe a new endoplasmic reticulum (ER)-associated stress response in the filamentous fungus Aspergillus niger. The inhibition of protein folding within the ER leads to cellular responses known collectively as the unfolded protein response (UPR) and we show that the selective transcriptional downregulation of the gene encoding glucoamylase,...
article 2004
Searched for: subject:"enzymology"
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