The mice were painlessly killed 24 h after the last allergen challenge. Article Acta Paediatr Taiwan 2006,47(3):127–34. The cell pellets were resuspended in PBS and lysed by three successive freezing and/thawing procedures, and then assayed for peroxidase activity in 96-well microassay plates, in duplicates, using 6.6 mM H2O2 and 1.5 mM orthophenylenodiamine (Merck, Whitehouse Station, NJ, USA). In B and D, columns represent the mean result of 5 (B) or 8 (D) animals; the vertical bars represent the standard deviation of the means. Our mission is to enable our customers to make the world healthier, cleaner, and safer. (G) Anti-B. Article After each nebulization with methacholine, recordings were taken for 5 min. BtE-immunized mice of the most responsive strain (A/J strain) were then assessed for the presence of intra-bronchial mucous, airway hyperresponsiveness (AHR) to methacholine challenge and inflammatory cell infiltration in lung tissue. Blomia tropicalis é uma espécie de ácaro presente em amostras de poeira intradomiciliar, comumente encontrado em regiões de clima tropical[1], como o Brasil, infestando residências. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Am J Respir Cell Mol Biol 1999, 21:480–89. Life Sci 1969,15;8(16):813–20. Article This work was supported by the Brazilian Ministry of Science and Technology (RENORBIO programme and Conselho Nacional de Pesquisa e Desenvolvimento Tecnológico - CNPq), the Fundações de Amparo à Pesquisa dos Estados da Bahia e São Paulo (FAPESB and FAPESP), and the Wellcome Trust (Grant No. Blomia tropicalis is a mite that belongs to the superfamily of Glycyphagidae. The EPO activity present in BALF was determined by means of the colorimetric assay that was described by Strath et al. ATC L and CAF carried out the experiments on low dose of BtE. (C) Levels of eosinophil peroxidase (EPO) in the BALF. Immune response of BALB/c, C57Bl/6, CBA/J and A/J mice sensitized withBlomia tropicalisextract (closed symbols) or injected with saline (open symbols). IFN-γ and IL-4, IL-10 and IL-13 concentration measurements were assayed in commercial ELISA kits according to manufacturer's instructions (Pharmingen, St. Diego, CA, USA). *p < 0.05, **p < 0.01, ***p < 0.001. The differences in IgE titers in BtE-sensitized and challenged mice in the four studied mouse strains were not statistically significant (p > 0.05; ANOVA), although A/J mice showed the highest titers, followed by the CBA/J, C57Bl/6 and BALB/c mice. Lack of human IgE cross … Yasue M, Yokota T, Suko M, Okudaira H, Okumura Y: Comparison of sensitization to crude and purified house dust mite allergens in inbred mice. … Presence of mucus in bronchi of A/J mice sensitized with ovalbumin (OVA),Blomia tropicalisextract (Bt) or saline (Control). Animals sensitized and challenged with BtE showed higher levels of total cells and eosinophils in the BALF than control mice (p < 0.001, Figure 2A, and p < 0.01, Figure 2B; Tukey's test). The data are representative of three independent experiments. Canela, Salvador, Bahia, CEP 40110902, Brasil, Tiana Baqueiro, Virgínia MG Silva, Ana T Cerqueira-Lima, Camila A Figueiredo & Neuza M Alcântara-Neves, Núcleo de Tecnologia em Saúde, Instituto Multidisciplinar em Saúde, Universidade Federal da Bahia, Av. Am J Physiol Lung Cell Mol Physiol 2003,285(1):L32–42. 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