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Reitsma, M. (author), Westerhout, J. (author), Wichers, H.J. (author), Wortelboer, H.M. (author), Verhoeckx, K.C.M. (author)In view of the imminent deficiency of protein sources for human consumption in the near future, new protein sources need to be identified. However, safety issues such as the risk of allergenicity are often a bottleneck, due to the absence of predictive, validated and accepted methods for risk assessment. The current strategy to assess the...article 2014
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Helbig, A. (author), Silletti, E. (author), van Aken, G.A. (author), Oosterveld, A. (author), Minekus, M. (author), Hamer, R.J. (author), Gruppen, H. (author)This study investigated the effect of gastric passage of protein stabilized emulsions, i.e., whey protein isolate (WPI) and lysozyme, under dynamic in vitro conditions on both the gastric and intestinal lipolysis. Emulsions were prepared at neutral pH to enable an opposite surface charge. Experiments were performed in a multi-compartmental...article 2013
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van den Abbeele, P. (author), Venema, K. (author), van de Wiele, T. (author), Verstraete, W. (author), Possemiers, S. (author)Different in vitro models have been developed to assess how food compounds affect the human gut microbiota. Using two such models (SHIME(R) and TIM-2), we compared how long-chain arabinoxylan (LC-AX), a wheat-derived potentially prebiotic fiber, and inulin (IN), a well-established prebiotic compound, modulate SCFA production and bifidobacteria...article 2013
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van Diepen, J.A. (author), Stienstra, R. (author), Vroegrijk, I.O.C.M. (author), van den Berg, S.A.A. (author), Salvatori, D. (author), Hooiveld, G.J. (author), Kersten, S. (author), Tack, C.J. (author), Netea, M.G. (author), Smit, J.W.A. (author), Joosten, L.A.B. (author), Havekes, L.M. (author), van Dijk, K.W. (author), Rensen, P.C.N. (author)Caspase-1 is known to activate the proinflammatory cytokines IL-1beta and IL-18. Additionally, it can cleave other substrates, including proteins involved in metabolism. Recently, we showed that caspase-1 deficiency in mice strongly reduces high-fat diet-induced weight gain, at least partly caused by an increased energy production. Increased...article 2013
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High-throughput analysis of the impact of antibiotics on the human intestinal microbiota compositionLadirat, S.E. (author), Schols, H.A. (author), Nauta, A. (author), Schoterman, M.H.C. (author), Keijser, B.J.F. (author), Montijn, R.C. (author), Gruppen, H. (author), Schuren, F.H.J. (author)Antibiotic treatments can lead to a disruption of the human microbiota. In this in-vitro study, the impact of antibiotics on adult intestinal microbiota was monitored in a new high-throughput approach: a fermentation screening-platform was coupled with a phylogenetic microarray analysis (Intestinal-chip). Fecal inoculum from healthy adults was...article 2013
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Peters, R. (author), Kramer, E. (author), Oomen, A.G. (author), Herrera Rivera, Z.E. (author), Oegema, G. (author), Tromp, P.C. (author), Fokkink, R. (author), Rietveld, A. (author), Marvin, H.J.P. (author), Weigel, S. (author), Peijnenburg, A.A.C.M. (author), Bouwmeester, H. (author)The presence, dissolution, agglomeration state, and release of materials in the nano-size range from food containing engineered nanoparticles during human digestion is a key question for the safety assessment of these materials. We used an in vitro model to mimic the human digestion. Food products subjected to in vitro digestion included (i) hot...article 2012
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Voortman, T. (author), Hendriks, H.F.J. (author), Witkamp, R.F. (author), Wortelboer, H.M. (author)Gastrointestinal (GI) peptide hormones play an important role in short-term regulation of food intake and blood glucose levels. Modulating their release is of potential relevance for weight management and possibly diabetes. As currently available models are hard to extrapolate to the human situation, the use of porcine intestinal tissue,...article 2012
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Mariman, R. (author), Kremer, S.H.A. (author), van Erk, M. (author), Lagerweij, T. (author), Koning, F. (author), Nagelkerken, L. (author)Background: Host-microbiota interactions in the intestinal mucosa play a major role in intestinal immune homeostasis and control the threshold of local inflammation. The aim of this study was to evaluate the efficacy of probiotics in the recurrent trinitrobenzene sulfonic acid (TNBS)-induced colitis model and gain more insight into protective...article 2012
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Vrins, C.L. (author), Ottenhoff, R. (author), van den Oever, K. (author), de Waart, D.R. (author), Kruyt, J.K. (author), Zhao, Y. (author), van Berkel, T.J. (author), Havekes, L.M. (author), Aerts, J.M. (author), van Eck, M. (author), Rensen, P.C. (author), Groen, A.K. (author)Transintestinal cholesterol efflux (TICE) provides an attractive target to increase body cholesterol excretion. At present, the cholesterol donor responsible for direct delivery of plasma cholesterol to the intestine is unknown. In this study, we investigated the role of HDL in TICE. ATP-binding cassette protein A1 deficient (Abca1(-/-)) mice...article 2012
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Havenaar, R. (author)This review tries to find a scientific answer on the following two questions: (1) to what extent do we understand the specific role of colonic microbial metabolites, especially short-chain fatty acids (SCFA), in maintaining the health status and prevention of diseases of the colon and the host; (2) to what extent can we influence or even control...article 2011
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Hamer, H.M. (author), Jonkers, D.M.A.E. (author), Renes, I.B. (author), Vanhoutvin, S.A.L.W. (author), Kodde, A. (author), Troost, F.J. (author), Venema, K. (author), Brummer, R.-J.M. (author), TNO Kwaliteit van Leven (author)INTRODUCTION: The colonic mucus layer plays an important role in the protection of the intestinal epithelium and mainly consists of mucin glycoproteins (primarily MUC2 in the colon) trefoil factor 3 (TFF3) and secretory IgA. Butyrate is a major end product of fermentation of dietary fibres and is associated with beneficial effects on colonic...article 2010
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End, C. (author), Bikker, F.J. (author), Renner, M. (author), Bergmann, G. (author), Lyer, S. (author), Blaich, S. (author), Hudler, M. (author), Helmke, B. (author), Gassler, N. (author), Autschbach, F. (author), Ligtenberg, A.J.M. (author), Benner, A. (author), Holmskov, U. (author), Schirmacher, P. (author), Nieuw Amerongen, A.V. (author), Rosenstiel, P. (author), Sina, C. (author), Franke, A. (author), Hafner, M. (author), Kioschis, P. (author), Schreiber, S. (author), Poustka, A. (author), Mollenhauer, J. (author)Deleted in malignant brain tumors 1 (DMBT1) is a secreted glycoprotein displaying a broad bacterial-binding spectrum. Recent functional and genetic studies linked DMBT1 to the suppression of LPS-induced TLR4-mediated NF-kappaB activation and to the pathogenesis of Crohn's disease. Here, we aimed at unraveling the molecular basis of its function...article 2009
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Maathuis, A. (author), Hoffman, A. (author), Evans, A. (author), Sanders, L. (author), Venema, K. (author), TNO Kwaliteit van Leven (author)OBJECTIVE: To investigate the effect of 5 newly developed maize-based fibers on the activity and composition of the microbiota in the colon. The fibers tested were glucose-based and had variable structures, including 2 resistant starch preparations, soluble corn fiber, pullulan, and soluble fiber dextrin. METHODS: The fibers were predigested,...article 2009
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Boesten, R.J. (author), Schuren, F.H.J. (author), de Vos, W.M. (author), TNO Kwaliteit van Leven (author)A genomic DNA-based microarray was constructed containing over 6000 randomly cloned genomic fragments of approximately 1-2 kb from six mammalian intestinal Bifidobacterium spp. including B. adolescentis, B. animalis, B. bifidum, B. catenulatum, B. longum and B. pseudolongum. This Bifidobacterium Mixed-Species (BMS) microarray was used to...article 2009
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Kong, H. (author), Wang, M. (author), Venema, K. (author), Maathuis, A. (author), van der Heijden, R. (author), van der Greef, J. (author), Xu, G. (author), Hankemeier, T. (author), TNO Kwaliteit van Leven (author)A high-performance liquid chromatography-high resolution Fourier transform ion cyclotron resonance mass spectrometry (HPLC-FTICR-MS) method was developed to investigate the metabolism of ginsenosides in in vitro models of the gastro-intestinal tract. The metabolites were identified by high-resolution tandem mass spectrometry. Degradation and...article 2009
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Kersten, S. (author), Lichtenstein, L. (author), Steenbergen, E. (author), Mudde, K. (author), Hendriks, H.F.J. (author), Hesselink, M.K. (author), Schrauwen, P. (author), Müller, M. (author), TNO Kwaliteit van Leven (author)OBJECTIVE-: Plasma lipoprotein levels are determined by the balance between lipoprotein production and clearance. Recently, angiopoietin-like protein 4 (ANGPTL4) was uncovered as a novel endocrine factor that potently raises plasma triglyceride levels by inhibiting triglyceride clearance. However, very little is known about ANGPTL4 in human....article 2009
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Hamer, H.M. (author), Jonkers, D.M.A.E. (author), Loof, A. (author), van Houtvin, S.A.L.W. (author), Troost, F.J. (author), Venema, K. (author), Kodde, A. (author), Koek, G.H. (author), Schipper, R.G. (author), van Heerde, W.L. (author), Brummer, R.J. (author), TNO Kwaliteit van Leven (author)Background: The mucus layer is an important dynamic component of the epithelial barrier. It contains mucin glycoproteins and other compounds secreted by the intestinal epithelium, such as secretory IgA. However, a standardized in vivo sampling technique of mucus in humans is not yet available. Aim: To assess the validity and feasibility of mucin...article 2009
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TNO Kwaliteit van Leven (author), Klaassens, E.S. (author), Boesten, R.J. (author), Haarman, M. (author), Knol, J. (author), Schuren, F.H. (author), Vaughan, E.E. (author), Vos, W.M.de (author)Although their exact function remains enigmatic, bifidobacteria are among the first colonizers of the newborn infant gut and further develop into abundant communities, notably in response to diet. Therefore, the transcriptional responses of bifidobacteria in rapidly processed fecal samples from young infants that were fed either breast milk or a...article 2009
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Kovatcheva-Datchary, P. (author), Egert, M. (author), Maathuis, A. (author), Rajilić-Stojanović, M. (author), de Graaf, A.A. (author), Smidt, H. (author), de Vos, W.M. (author), Venema, K. (author), TNO Kwaliteit van Leven (author)Summary Carbohydrates, including starches, are an important energy source for humans, and are known for their interactions with the microbiota in the digestive tract. Largely, those interactions are thought to promote human health. Using 16S ribosomal RNA (rRNA)-based stable isotope probing (SIP), we identified starch-fermenting bacteria under...article 2009
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Dihal, A.A. (author), van der Woude, H. (author), Hendriksen, P.J.M. (author), Charif, H. (author), Dekker, L.J. (author), IJsselstijn, L. (author), de Boer, V.C.J. (author), Alink, G.M. (author), Burgers, P.C. (author), Rietjens, I.M.C.M. (author), Woutersen, R.A. (author), Stierum, R.H. (author), TNO Kwaliteit van Leven (author), KvL (author)Quercetin has been shown to act as an anticarcinogen in experimental colorectal cancer (CRC). The aim of the present study was to characterize transcriptome and proteome changes occurring in the distal colon mucosa of rats supplemented with 10 g quercetin/kg diet for 11 wk. Transcriptome data analyzed with Gene Set Enrichment Analysis showed...article 2008