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van der Veer, C. (author), Hertzberger, R.Y. (author), Bruisten, S.M. (author), Tytgat, H.L.P. (author), Swanenburg, J. (author), de Kat Angelino-Bart, A. (author), Schuren, F. (author), Molenaar, D. (author), Reid, G. (author), de Vries, H. (author), Kort, R. (author)Background: A vaginal microbiota dominated by lactobacilli (particularly Lactobacillus crispatus) is associated with vaginal health, whereas a vaginal microbiota not dominated by lactobacilli is considered dysbiotic. Here we investigated whether L. crispatus strains isolated from the vaginal tract of women with Lactobacillus-dominated vaginal...article 2019
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Rusli, F. (author), Boekschoten, M.V. (author), Borelli, V. (author), Sun, C. (author), Lute, C. (author), Menke, A.L. (author), van den Heuvel, J. (author), Salvioli, S. (author), Franceschi, C. (author), Müller, M. (author), Steegenga, W.T. (author)Calorie restriction (CR) is a dietary regimen that supports healthy aging. In this study, we investigated the systemic and liver-specific responses caused by a diet switch to a medium-fat (MF) diet in 24-month-old lifelong, CR-exposed mice. This study aimed to increase the knowledge base on dietary alterations of gerontological relevance. Nine...article 2018
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Verhoeckx, K.C.M. (author), Vissers, Y.M. (author), Baumert, J.L. (author), Faludi, R. (author), Feys, M. (author), Flanagan, S. (author), Herouet-Guicheney, C. (author), Holzhauser, T. (author), Shimojo, R. (author), van der Bolt, N. (author), Wichers, H. (author), Kimber, I. (author)Food processing can have many beneficial effects. However, processing may also alter the allergenic properties of food proteins. A wide variety of processing methods is available and their use depends largely on the food to be processed. In this review the impact of processing (heat and non-heat treatment) on the allergenic potential of proteins...article 2015
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Willems, N.M.B.K. (author), Langenbach, G.E.J. (author), Stoop, R. (author), den Toonder, J.M.J. (author), Mulder, L. (author), Zentner, A. (author), Everts, V. (author)The role of mature collagen cross-links, pentosidine (Pen) cross-links in particular, in the micromechanical properties of cancellous bone is unknown. The aim of this study was to examine nonenzymatic glycation effects on tissue stiffness of demineralized and non-demineralized cancellous bone. A total of 60 bone samples were derived from...article 2014
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TNO Kwaliteit van Leven (author), Kleinnijenhuis, A.J. (author), Hedegaard, C. (author), Lundvig, D. (author), Sundbye, S. (author), Issinger, O.G. (author), Jensen, O.N. (author), Jensen, P.H. (author)P25alpha is a protein normally expressed in oligodendrocytes and subcellular relocalization of p25alpha occurs in multiple system atrophy, Parkinson's disease and Lewy body dementia along with ectopic expression in neurons. Moreover, it accumulates in Lewy body inclusions with aggregated alpha-synuclein and is a potent stimulator of alpha...article 2008
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TNO Kwaliteit van Leven (author), Kralj, S. (author), van Leeuwen, S.S. (author), Valk, V. (author), Eeuwema, W. (author), Kamerling, J.P. (author), Dijkhuizen, L. (author)The reuteransucrase enzymes of Lactobacillus reuteri strain 121 (GTFA) and L. reuteri strain ATCC 55730 (GTFO) convert sucrose into alpha-d-glucans (labelled reuterans) with mainly alpha-(1→4) glucosidic linkages (50% and 70%, respectively), plus alpha-(1→6) linkages. In the present study, we report a detailed analysis of various hybrid GTFA/O...article 2008
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Karnaukhova, E. (author), Ophir, Y. (author), Trinh, L. (author), Dalal, N. (author), Punt, P.J. (author), Golding, B. (author), Shiloach, J. (author), TNO Kwaliteit van Leven (author)Background: Human α1-proteinase inhibitor (α1-PI), also known as antitrypsin, is the most abundant serine protease inhibitor (serpin) in plasma. Its deficiency is associated with development of progressive, ultimately fatal emphysema. Currently in the United States, α1-PI is available for replacement therapy as an FDA licensed plasma-derived (pd...article 2007
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de Groot, J. (author), Kosters, H.A. (author), de Jongh, H.H.J. (author), TNO Kwaliteit van Leven (author)To study the influence of the carbohydrate-moiety of ovalbumin on the formation of the heat-stable conformer S-ovalbumin, ovalbumin is deglycosylated with PNGase-F under native conditions. Although the enzymatic deglycosylation procedure resulted in a complete loss of the ability to bind to Concavalin A column-material, only in about 50% the...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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Broersen, K. (author), Elshof, M. (author), de Groot, J. (author), Voragen, A.G.J. (author), Hamer, R.J. (author), de Jongh, H.H.J. (author), TNO Kwaliteit van Leven (author)A large number of proteins are glycosylated, either in vivo or as a result of industrial processing. Even though the effect of glycosylation on the aggregation of proteins has been studied extensively in the past, some reports show that the aggregation process is accelerated, whereas others found that the process is inhibited by glycosylation....article 2007
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Three-way stabilization of the covalent intermediate in amylomaltase, an alpha-like transglycosylaseTNO Kwaliteit van Leven (author), Barends, T.R.M. (author), Bultema, J.B. (author), Kaper, T. (author), van der Maarel, M.J.E.C. (author), Dijkhuizen, L. (author), Dijkstra, B.W. (author)Amylomaltases are glycosyl hydrolases belonging to glycoside hydrolase family 77 that are capable of the synthesis of large cyclic glucans and the disproportionation of oligosaccharides. Using protein crystallography, we have generated a flip book movie of the amylomaltase catalytic cycle in atomic detail. The structures include a covalent...article 2007
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TNO Kwaliteit van Leven TNO Voeding (author), Ozimek, L.K. (author), Kralj, S. (author), Kaper, T. (author), van der Maarel, M.J.E.C. (author), Dijkhuizen, L. (author)Bacterial fructansucrase enzymes belong to glycoside hydrolase family 68 and catalyze transglycosylation reactions with sucrose, resulting in the synthesis of fructooligosaccharides and/or a fructan polymer. Significant differences in fructansucrase enzyme product specificities can be observed, i.e. in the type of polymer (levan or inulin)...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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TNO Kwaliteit van Leven (author), Steenvoorden, M.M.C. (author), Huizinga, T.W.J. (author), Verzijl, N. (author), Bank, R.A. (author), Ronday, H.K. (author), Luning, H.A.F. (author), Lafeber, F.P.J.G. (author), Toes, R.E.M. (author), de Groot, J. (author)Objective. The major risk factor for osteoarthritis (OA) is aging, but the mechanisms underlying this risk are only partly understood. Age-related accumulation of advanced glycation end products (AGEs) could be one of these mechanisms. We undertook this study to investigate the role of the receptor for AGEs (RAGE) in mediating the cellular...article 2006
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TNO Kwaliteit van Leven (author), Ozimek, L.K. (author), Kralj, S. (author), van der Maarel, M.J.E.C. (author), Dijhuizen, L. (author)Bacterial fructosyltransferase (FTF) enzymes synthesize fructan polymers from sucrose. FTFs catalyse two different reactions, depending on the nature of the acceptor, resulting in: (i) transglycosylation, when the growing fructan chain (polymerization), or mono- and oligosaccharides (oligosaccharide synthesis), are used as the acceptor substrate...article 2006
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Gusakov, A.V. (author), Sinitsyn, A.P. (author), Salanovich, T.N. (author), Bukhtojarov, F.E. (author), Markov, A.V. (author), Ustinov, B.B. (author), Zeijl, C.V. (author), Punt, P. (author), Burlingame, R. (author), TNO Kwaliteit van Leven (author)Two forms of cellobiohydrolase I (CBH I, Cel7A) were purified from the culture ultrafiltrate of a mutant strain of the fungus Chrysosporium lucknowense, an industrial producer of cellulases and hemicellulases. The enzymes had different molecular masses (52 and 65 kDa, SDS-PAGE data) but the same pI (4.5). Peptide sequencing showed that a single...article 2005
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Hernandez, C.J. (author), Tang, S.Y. (author), Baumbach, B.M. (author), Hwu, P.B. (author), Sakkee, A.N. (author), van der Ham, F. (author), de Groot, J. (author), Bank, R.A. (author), Keaveny, T.M. (author), TNO Preventie en Gezondheid (author)The propensity of individual trabeculae to fracture (microfracture) may be important clinically since it could be indicative of bone fragility. Whether or not an overloaded trabecula fractures is determined in part by its structural ductility, a mechanical property that describes how much deformation a trabecula can sustain. The overall goal of...article 2005
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van Teeffelen, A.M.M. (author), Broersen, K. (author), de Jongh, H.H.J. (author), TNO Kwaliteit van Leven (author)Chemical glycosylation of proteins occurs in vivo spontaneously, especially under stress conditions, and has been linked in a number of cases to diseases related to protein denaturation and aggregation. It is the aim of this work to study the origin of the change in thermodynamic properties due to glucosylation of the folded β-lactoglobulin A....article 2005
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Broersen, K. (author), Voragen, A.G.J. (author), Hamer, R.J. (author), de Jongh, H.H.J. (author), TNO Voeding (author)In this article we show how various degrees of glycosylation can be used to control the thermal stability of proteins. The primary amines of β-lactoglobulin were glycosylated with glucose or fructose within a range of non-denaturing reaction parameters. The modified fractions were characterized and analyzed for structural stability and...article 2004
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de Groot, J. (author)Accumulation of advanced glycation endproducts (AGEs) plays a crucial part in the development of age-related diseases and diabetic complications. AGEs are formed in vivo via the so-called Maillard reaction: a reducing sugar reacts with a protein to form a labile Amadori product that is subsequently stabilized, producing an irreversible, non...article 2004