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Apostolovic, D. (author), Luykx, D. (author), Warmenhoven, H. (author), Verbart, D. (author), Stanic-Vucinic, D. (author), de Jong, G.A.H. (author), Velickovic, T.C. (author), Koppelman, S.J. (author)Conglutins, the major peanut allergens, Ara h 2 and Ara h 6, are highly structured proteins stabilized by multiple disulfide bridges and are stable towards heat-denaturation and digestion. We sought a way to reduce their potent allergenicity in view of the development of immunotherapy for peanut allergy. Isoforms of conglutin were purified,...article 2013
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van Esch, B.C.A.M. (author), van Bilsen, J.H.M. (author), Jeurink, P.V. (author), Garssen, J. (author), Penninks, A.H. (author), Smit, J.J. (author), Pieters, R.H.H. (author), Knippels, L.M.J. (author)This study describes two phases of a multi-phase project aiming to validate a mouse model for cow's milk allergy to assess the potential allergenicity of hydrolysed cow's milk based infant formulas (claim support EC-directive 2006/141/E). The transferability and the discriminatory power of this model was evaluated in 4 research centers. Mice...article 2013
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Dambacher, W.M. (author), de Kort, E.H.M. (author), Blom, W.M. (author), Houben, G.F. (author), de Vries, E. (author)Background: Children with cow's milk allergy (CMA) need a cow's milk protein (CMP) free diet to prevent allergic reactions. For this, reliable allergy-information on the label of food products is essential to avoid products containing the allergen. On the other hand, both overzealous labeling and misdiagnosis that result in unnecessary...article 2013
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Blom, W.M. (author), Vlieg-Boerstra, B.J. (author), Kruizinga, A.G. (author), van der Heide, S. (author), Houben, G.F. (author), Dubois, A.E.J. (author)Background: For most allergenic foods, insufficient threshold dose information within the population restricts the advice on levels of unintended allergenic foods which should trigger precautionary labeling on prepackaged foods. Objective: We wanted to derive threshold dose distributions for major allergenic foods and to elaborate the protein...article 2013
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Blom, W.M. (author), Houben, G.F. (author)The unintentional presence of allergens in prepacked foods caused by cross contact is a problem for food allergic patients and food producers. The labelling of products with a precautionary label such as ‘May contain traces of ...’ shows a poor correlation with the actual presence or absence of food allergens due to cross contact of products....article 2013
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Michelsen-Huisman, A.D. (author), van Os-Medendorp, H. (author), Versluis, A. (author), Kruizinga, A.G. (author), Castenmiller, J.J.M. (author), Noteborn, H.P.J.M. (author), Houben, G.F. (author), Knulst, A.C. (author)Unexpected reactions occur in patients with food allergy, but frequency data are scare. This prospective study investigates the frequency, severity and causes of unexpected allergic reactions to food in adults with a doctor's diagnosed food allergy. Participants complete an online questionnaire after every unexpected reaction and send in the...article 2013
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Koppelman, S.J. (author), Nordlee, J.A. (author), Lee, P.W. (author), Happe, R.P. (author), Hessing, M. (author), Norland, R. (author), Manning, T. (author), Deschene, R. (author), de Jong, G.A.H. (author), Taylor, S.L. (author)The major allergen parvalbumin was purified from cod muscle tissues, and polyclonal antibodies were raised towards it. The antibodies were tested for specificity and an enzyme-linked immunosorbent assay (ELISA) was developed using these antibodies. The ELISA was applied to measure parvalbumin in cod skin, the starting material for fish gelatin...article 2012
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Jacobs, J.H. (author), Fuertes, E. (author), Krop, E.J.M. (author), Spithoven, J. (author), Tromp, P. (author), Heederik, D.J.J. (author)Objectives: To describe associations among swimming, respiratory health, allergen sensitisation and Clara cell protein 16 (CC16) levels in Dutch schoolchildren. Trichloramine levels in swimming pool air were determined to assess potential exposure levels. Methods: Respiratory health and pool attendance information was collected from 2359...article 2012
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Respiratory sensitization: Advances in assessing the risk of respiratory inflammation and irritationVandebriel, R. (author), Callant Cransveld, C. (author), Crommelin, D. (author), Diamant, Z. (author), Glazenburg, B. (author), Joos, G. (author), Kuper, F. (author), Natsch, A. (author), Nijkamp, F. (author), Noteborn, H. (author), Pieters, R. (author), Roberts, D. (author), Roggen, E. (author), Rorije, E. (author), Seed, M. (author), Sewald, K. (author), van den Heuvel, R. (author), van Engelen, J. (author), Verstraelen, S. (author), van Loveren, H. (author)Respiratory sensitization provides a case study for a new approach to chemical safety evaluation, as the prevalence of respiratory sensitization has increased considerably over the last decades, but animal and/or human experimental/predictive models are not currently available. Therefore, the goal of a working group was to design a road map to...article 2011
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Spanjersberg, M.Q.I. (author), Knulst, A.C. (author), Kruizinga, A.G. (author), van Duijn, G. (author), Houben, G.F. (author), TNO Kwaliteit van Leven (author)Food products can become contaminated with food allergens due to cross-contact. Precautionary 'may contain' labelling may alert to the possible presence of an allergen, but guidance for such labelling is lacking. As a result, allergy information on the packaging may not be reliable and allergic consumers might be at risk of allergic reactions...article 2010
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Baatjies, R. (author), Meijster, T. (author), Lopata, A. (author), Sander, I. (author), Raulf-Heimsoth, M. (author), Heederik, D. (author), Jeebhay, M. (author), TNO Kwaliteit van Leven (author)Introduction: Exposure to flour dust has been reported as an important risk factor for allergic respiratory disease among bakery workers. A high prevalence of allergic sensitization and asthma was recently reported in South African supermarket bakeries. The aim of this study was to conduct a detailed exposure assessment of these bakeries so as...article 2010
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van Triel, J.J. (author), Arts, J.H. (author), Muijser, H. (author), Kuper, C.F. (author), TNO Kwaliteit van Leven (author)Previously, the contact allergen dinitrochlorobenzene (DNCB) was identified as a sensitizer by inhalation in BALB/c mice; in addition, DNCB induced a lymphocytic infiltrate in the larynx of dermally sensitized Th1-prone Wistar rats upon a single inhalation challenge. In the present study, repeated inhalation exposures to DNCB were investigated...article 2010
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TNO Kwaliteit van Leven (author), Koppelman, S.J. (author), Hefle, S.L. (author), Taylor, S.L. (author), de Jong, G.A.H. (author)Scope: There are differences in stability to pepsin between the major allergens in peanut; however, data are from different reports using different digestion models. This study provides a comprehensive comparison of the digestibility of the major peanut allergens.Methods and results: Peanut allergens Ara h 1, Ara h 2, Ara h 3 and Ara h 6 were...article 2010
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de Jong, W.H. (author), Arts, J.H.E. (author), de Klerk, A. (author), Schijf, M.A. (author), Ezendam, J. (author), Kuper, C.F. (author), van Loveren, H. (author), TNO Kwaliteit van Leven (author)There are currently no validated animal models that can identify low molecular weight (LMW) respiratory sensitizers. The Local Lymph Node Assay (LLNA) is a validated animal model developed to detect contact sensitizers using skin exposure, but all LMW respiratory sensitizers tested so far were also positive in this assay. Discrimination between...article 2009
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Madsen, C.B. (author), Hattersley, S. (author), Buck, J. (author), Gendel, S.M. (author), Houben, G.F. (author), Hourihane, J.OB. (author), Mackie, A. (author), Mills, E.N.C. (author), Nørhede, P. (author), Taylor, S.L. (author), Crevel, R.W.R. (author), TNO Kwaliteit van Leven (author)A workshop was organised to investigate whether risk assessment strategies and methodologies used in classical/conventional toxicology may be used for risk assessment of allergenic foods, to discuss the advantages and limitations of different approaches and to determine the research needed to move the area forward. Three possible approaches to...article 2009
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Molecular characterization of trimellitic anhydride-induced respiratory allergy in Brown Norway ratsKuper, C.F. (author), Heijne, W.H. (author), Dansen, M. (author), Verhoeckx, K.C. (author), Boorsma, A. (author), Radonjic, M. (author), Bruijntjes, J. (author), Stierum, R. (author), Muijser, H. (author), Arts, J.H. (author), TNO Kwaliteit van Leven (author)To contribute to the hazard identification of low molecular weight (LMW) respiratory allergens, respiratory allergy induced by trimellitic anhydride (TMA) was characterized by whole genome analysis of lung tissue and blood proteomics in Brown Norway rats. Dermal sensitization (50% and 25% w/v) with TMA and an inhalation challenge of 15 mg/m(3)...article 2008
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van Boxtel, E.L. (author), Koppelman, S.J. (author), van den Broek, L.A.M. (author), Gruppen, H. (author), TNO Kwaliteit van Leven (author)Ber e 1, a major allergen from Brazil nuts, is very stable to in vitro peptic digestion. As heat-induced denaturation may affect protein digestibility, the denaturation behaviour of Ber e 1 was investigated. The denaturation temperature of Ber e 1 varies from approximately 80-110 °C, depending on the pH. Upon heating above its denaturation...article 2008
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Jacobs, J.H. (author), Meijster, T. (author), Meijer, E. (author), Suarthana, E. (author), Heederik, D. (author), TNO Kwaliteit van Leven (author)Background: Occupational airway diseases are common among bakers. The present study describes the association between exposure to wheat allergen levels and sensitization to wheat allergens, work-related upper and lower respiratory symptoms and asthma in bakery workers. Methods: As part of a Health Surveillance System for early detection of ...article 2008
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Ladics, G.S. (author), van Bilsen, J.H.M. (author), Brouwer, H.M.H. (author), Vogel, L. (author), Vieths, S. (author), Knippels, L.M.J. (author), TNO Kwaliteit van Leven (author), KvL (author)Specific IgE sera screening studies are employed to investigate protein cross-reactivity. Such nonfunctional immunochemical methods cannot measure the biological activity of proteins. Therefore, an assay using RBL cells transfected with human FcεRI was developed. Our objective was to evaluate the degranulation of three cell-lines expressing...article 2008
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Arts, J.H.E. (author), Schijf, M.A. (author), Kuper, C.F. (author), TNO Kwaliteit van Leven (author)Irritant-induced inflammation of the airways may aggravate respiratory allergy induced by chemical respiratory allergens. Therefore, the effect of airway irritation by synthetic amorphous silica (SAS) on respiratory allergy to trimellitic anhydride (TMA) was studied. Brown Norway (BN) rats were topically sensitized on day 0 and on day 7,...article 2008