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Bis(tributyltin)oxide (TBTO) decreases the food allergic response against peanut and ovalbumin in Brown Norway rats

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Author: Jonge, J.D. de · Ezendam, J. · Knippels, L.M.J. · Odink, J. · Pourier, M.S. · Penninks, A.H. · Pieters, R. · Loveren, H. van
Type:article
Date:2007
Institution: TNO Kwaliteit van Leven
Source:Toxicology, 1-2, 239, 68-76
Identifier: 240193
doi: doi:10.1016/j.tox.2007.06.090
Keywords: Health · Toxicology and Applied Pharmacology · Bis(tributyltin)oxide · Brown Norway rat · Food allergy · Ovalbumin · Peanut · TBTO · bis(tributyltin) oxide · cytokine · immunoglobulin E · ovalbumin · proteinase · animal cell · animal experiment · animal model · article · basophil · controlled study · cytokine production · eosinophil · female · food allergy · food chain · granulocyte · immunology · immunomodulation · lymphocyte proliferation · mast cell · mesentery lymph node · nonhuman · peanut allergy · Peyer patch · priority journal · rat · risk assessment · spleen cell · Th2 cell · Adjuvants, Immunologic · Administration, Oral · Allergens · Animals · Antibody Formation · Cell Count · Cell Proliferation · Disease Models, Animal · Female · Granulocytes · Immunosuppressive Agents · Lymph Nodes · Lymphocytes · Mast Cells · Metalloendopeptidases · Ovalbumin · Peanut Hypersensitivity · Peyer's Patches · Rats · Rats, Inbred BN · Spleen · Trialkyltin Compounds · Arachis hypogaea · Rattus · Rattus norvegicus

Abstract

Other factors than the allergen itself may be of importance in the development of food allergy. This report describes the influence of the immunosuppressive compound bis(tributyltin)oxide (TBTO), present in the food chain, on the development of food allergy to peanut or ovalbumin in Brown Norway (BN) rats. To study these effects BN rats were sensitized to either 1 or 10 mg peanut or ovalbumin by daily oral gavage and the TBTO-groups were fed a diet containing 80 mg TBTO per kg diet. Co-exposure to TBTO not only resulted in decreased general immunologic parameters such as weights of mesenteric lymph nodes and Peyer's patches, lymphocyte proliferation rates in splenocytes, but also on allergic parameters. In the peanut allergen-model TBTO decreased allergen-specific Th2 cytokine production by spleen cells, number of eosinophilic and basophilic granulocytes in the blood and production of mast cell protease II after oral food challenge. In the ovalbumin allergen-model TBTO decreased the number of eosinophilic and basophilic granulocytes, allergen-specific IgE and production of mast cell protease II after oral food challenge. The data imply that in the process of risk assessment of food allergy attention should be given to immunomodulating compounds present in the diet. © 2007 Elsevier Ireland Ltd. All rights reserved.