blomia tropicalis wikipedia

The washings were carried out until no food residues could be seen under microscopy. Dust mite proteins, such as Blo t 11, a paramyosin from B. tropicalis that is homologue to a helminth molecule, is responsible for the cross-reactivity found between helminths and dust-mite species [33], and may be leading to the non-specific IgE stimulation in BtE-sensitized mice found in this and in the above mentioned work. Background The dust mite Blomia tropicalis is an important source of aeroallergens in tropical areas. High frequencies of positivity to B. tropicalis antigens in skin prick tests have been described in asthma and rhinitis patients, such as 68.1% in Cuba [7], 91.6% in Venezuela [8], 73.3% in Taiwan [9] and 95.0% in São Paulo, Brazil [10]. EPO activity in BALF was also higher in BtE-sensitized than in OVA-sensitized and control mice (p < 0.05 and p < 0.001, respectively; Tukey's test; Figure 2C). As an international journal, DARU Journal of Pharmaceutical Sciences considers outstanding studies from basic research to clinical investigations as original articles, systematic reviews, meta-analyses, general reviews, mini-reviews, short communications, and editorials from the global scientific community. In Europe, detectable Der p 1 or Der f 1 allergen was found in 68% of surveyed homes. Descriere. Cite this article. Differential cell counts were performed in light microscopy, according to standard morphologic criteria, by counting, in a blinded fashion, 100 cells in cytospin preparations stained with Rosenfeld's stain. J Allergy Clin Immunol 1997,100(6 Pt 1):S2–24. Keller AC, Mucida D, Gomes E, Faquim-Mauro E, Faria AMC, Rodriguez D, Russo M: Hierarchial suppression of asthma-like responses by mucosal tolerance. The data are representative of three independent experiments. The first was to study the anti-B. The mites were lysed in 0.15 M phosphate-buffered saline, pH 7.4 (PBS), in a blender (Waring Commercial, Torrington, Connecticut, USA). (A) Total leukocyte numbers in BALF. Health issues Allergies . PubMed  PubMed  Ramos JD, Cheong N, Lee BW, Chua KY: cDNA cloning and expression of Blo t 11, the Blomia tropicalis allergen homologous to paramyosin. 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). Int Arch Allergy Immunol 2001,126(4):286–93. Jumlah Blomia tropicalis cukup besar ditemukan pada rumah-rumah di daerah tropis dan subtropis (Arlian et al., 1993). Storage mites are a possible cause of allergic disorders and mostly present among agriculture population. Lack of human IgE cross … MR contributed in planning the experiments and reviewing the manuscript. de Brito CA, Fusaro AE, Victor JR, Rigato PO, Goldoni AG, Muniz BP, Duarte AJS, Sato MN, Bruno : CpG-Induced Th1-Type Response in the Downmodulation of Early Development of Allergy and Inhibition of B7 Expression on T Cells of Newborn Mice. Am J Physiol Lung Cell Mol Physiol 2003,285(1):L32–42. Blomia tropicalis, a Storage mite, was earlier found predominantly in agricultural environments but is now being recognised as an important contributor to the allergen content in house dust in indoor urban dwellings (1). Blomia tropicalis allergens are the most important mite allergens in tropical regions. JCI 2006,116(2):306–8. Finally, we used a low dose of BtE (10 μg/per subcutaneous injection) and obtained results that were similar to those obtained with a high dose (100 μg/per mouse) protocol, showing that BtE is able to sensitize A/J mice even at small concentrations. After each nebulization with methacholine, recordings were taken for 5 min. Respiratory allergy to Blomia tropicalis: Immune response in four syngeneic mouse strains and assessment of a low allergen-dose, short-term experimental model. B. tropicalis house dust mites were collected from bed dust in Salvador, Brazil, cloned and cultured with a powdered fish food medium (Spirulina, Alcon Gold, São Paulo, Brazil), and dry yeast (Fermipan, São Paulo, Brazil), at 25°C and 75% humidity. J Clin Immunol 2004,24(5):533–41. Departamento de Biointeração, Instituto de Ciências da Saúde, Universidade Federal da Bahia, Av. volume 11, Article number: 51 (2010) State of the art Sensitization to this mite is very common in South America and Southeast Asia. (B) Differential cell count in the BALF. Muller E, Bergmann KC, Lachmann B, Vogel J: Experimental model of bronchial asthma. Cookies policy. Detectable dust mite allergen was found in the beds of about 84% of surveyed United States homes. Proc Natl Acad Sci USA 1995,92(26):12290–12294. CAS  The circunference area of the bronchi in the PAS-stained area was electronically measured and the mucus index was determined by the following formula: Mucus index = (PAS-stained area/bronquial cross-section area) × 100. BtE-sensitized animals had more total serum IgE as well as higher titers of anti-BtE IgE antibodies than the saline control group (Figure 5D and 5E; p < 0.05; Student's t test and Mann-Whitney's test, respectively). https://pt.wikipedia.org/w/index.php?title=Blomia_tropicalis&oldid=37551428, Atribuição-CompartilhaIgual 3.0 Não Adaptada (CC BY-SA 3.0) da Creative Commons. Serum anti-OVA or anti-BtE IgG1 and IgG2a antibodies were measured using OVA- or BtE-coated microtitre plates and biotin-conjugated anti-mouse IgG1 or anti-mouse IgG2a, respectively (Pharmingen, St. Diego, CA, USA), in conjunction with streptavidin-horseradish peroxidase, H2O2 and orthophenylenodiamine (Merck, Whitehouse Station, NJ, USA). Storage mites can also adapt their feeding to house dust. Existem duas espécies mais prevalentes no Brasil - Dermatophagoides pteronyssinus e D. farinae.O ácaro Dermatophagoides é considerado o principal agente causador de alergia respiratória no Brasil junto com outro ácaro conhecido como Blomia tropicalis. (E) IgE anti-Bt antibody serum titers as determined by passive cutaneous anaphylaxis (PCA). Mice were deeply anesthetized by intraperitoneal injection with a solution containing ketamine (Ketamina Agener; União Química Farmacêutica Nacional S/A, São Paulo, Brazil) and chloral hydrate (Labsynth, São Paulo, Brazil) and blood samples from the retro orbital plexus were collected for serum antibody level determinations. Reitor Miguel Calmon, Sem n°. Initially described as a storage mite, it is now considered as a house dust mite of tropical and sub-tropical areas. Notably, mice sensitized with BtE produced higher amounts of total IgE than those sensitized with OVA, in amounts similar to those observed with immunization with helminth antigens [32]. Espesye sa uhong sakop sa division nga Ascomycota ang Candida tropicalis.Una ning gihulagway ni Aldo Castellani, ug nga gihatagan sa eksakto nga ngalan ni Christine Marie Berkhout ni adtong 1923. LPC participated in planning the experiments and reviewing the manuscript. PubMed  The most common genus of mites found in house dust in north America and Europe is Dermatophagoides, of which there are two species, D. pteronyssinus and D. farinae. Blomia tropicalis é uma espécie de ácaro presente em amostras de poeira intradomiciliar, comumente encontrado em regiões de clima tropical, como o Brasil, infestando residências. Clin Exp Allergy 2002, 32:602–611. It may also infest stored food. Each column represents the mean of the mucus indexes of 5 mice, and the vertical bars represent the standard deviation of the mean. In brief, 0.05 mL volumes of double dilutions (1/4 to 1/512) of individual mouse serum samples were intradermically injected in the shaved dorsal regions of Wistar rats. The relevance and reproducibility of experimental animal models of allergy depends on the genetic background of the animal, the molecular composition of the allergen and the experimental protocol. In our model, eosinophils were the preponderant cells in the airways, however similar numbers of neutrophils and eosinophils were found in airways when the animals were sensitized without alum (data not shown). All results were considered statistically significant when p ≤ 0.05. A significantly larger number of cells was found in the BALF of the mice sensitized with low-dose of BtE than in the BALF of the saline control group (Figure 5A; p < 0.01; Student's t test). However, in humans, most cases of asthma are due to aeroallergens, and OVA-induced asthma is far from being a common event. Four different batches of BtE were used in different experiments. B. tropicalis is a storage mite, which is increasingly linked to allergy. © 2021 BioMed Central Ltd unless otherwise stated. All used batches contained 30-40 ng of this allergen per μg of protein. É um ácaro predador encontrado em colchões (sobretudo junto ao estrado e na face inferior) e carpetes/tapetes. Clin Exp Allergy 1999,29(7):982–8. Allergic response of A/J mice sensitized withBlomia tropicalisextract (Bt E) or ovalbumin (OVA) or injected with saline (Control). Rev Inst Med Trop Sao Paulo 2004,46(1):1–8. Format. Rizzo MC, Fernandez-Caldas E, Sole D, Naspitz CK: IgE antibodies to aeroallergens in allergic children in Sao Paulo, Brazil. Article  The data are representative of three independent experiments. El măsoară 420 micrometri în lungime și 250-320 microni în lățime. [11]. Finally, they had intense AHR. … Among the mites, Dermatophagoides pteronyssinus and Blomia tropicalis are the main sources of allergens in sub-tropical and tropical regions of the world [4–6]. P > 0.05 is not represented. Its use as an assay for eosinophil differentiation factors. Hasegawa K, Tamari M, Shao C, Shimizu M, Takahashi N, Mao XQ, Yamasaki A, Kamada F, Doi S, Fujiwara H, Miyatake A, Fujita K, Tamura G, Matsubara Y, Shirakawa T, Suzuki Y: Variations in the C3, C3a receptor, and C5 genes affect susceptibility to bronchial asthma in human beings. J Allergy Clin Immunol 2006, 117:283–290. Entry date: September 24, 2002 12:00 +1GMT: Last update: July 24, 2019 20:03 +1GMT: Allergome Code: 152 室塵 蟎 ( ㄇㄢˊ ) 屬(学名: Dermatophagoides )(英語: house dust mite )是一種8隻腳的微小動物,屬於節肢動物門 蛛形綱 恙蟎目 塵蟎科。 是台灣兒童主要的過敏原之一 。. Article  P > 0.05 is not represented. As a second objective of the present work, mice of the best-responder strain were immunized with relatively low doses of BtE aiming at obtaining a low allergen-dose, short term murine model of respiratory allergy to B. tropicalis that reproduced many immunological and pathological features of the human disease. Each symbol corresponds to the result obtained from an individual animal. Eosinophil numbers increased in the BALF of all sensitized mouse strains, in relation to their saline control (Figure 1B; p < 0.05 for BALB/c and p < 0.001 for A/J, CBA/J and C57Bl/6; Tukey's test). (D) total serum IgE. Respiratory Research Polo día, o home perde 1 g destes pedazos de pel. *p < 0.05, **p < 0.01, ***p < 0.001. Nat Immunol 2000,1(3):221–6. It is an in vitro quantitative assay that is intended to be used in conjunction with other clinical information to aid in the diagnosis of allergic diseases. Presence of mucus in bronchi of A/J mice sensitized with ovalbumin (OVA),Blomia tropicalisextract (Bt) or saline (Control). Although the total cell counts in BALF were higher in sensitized A/J mice than in the other sensitized mouse strains, the differences were not statistically significant (p > 0.05, ANOVA test; Figure 1A). Despite the bulk of work done in humans on mite-specific allergy, data on allergic responses to B. tropicalis antigens in murine models are scarce [14–16]. This is accordance to Takeda and collaborators' observation that the intranasal instillation alone of BtE elicited an IgE antibody response only when the antigen was continuously administered for a period of over 24 weeks [15]. The species Blomia tropicalis is typically found only in tropical or subtropical regions. A-D, Student's t test; E, Mann-Whitney's test. On the other hand, a protocol developed by Eum and collaborators [26], using OVA, showed that shortening the duration of the allergic protocol did not affect the immunopathological features of the experimental disease, when it was compared with classical protocols [24]. J Allergy Clin Immunol 1987,80(6):755–75. P > 0.05 is not represented. Pulm Pharmacol 1989,2(2):59–74. In addition to allergen-dependent differences in intensity and nature of the allergic responses, the genetic makeup of the host seems to play an important role in murine models of respiratory allergy. The BALF supernatants were stored at -70°C until used. 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. After the BALF collection, the lungs were perfused, via the heart right ventricle, to remove residual blood, immersed in 10% phosphate-buffered formalin for 24 h, followed by 70% ethanol, and embedded in paraffin. Sensitization with OVA (p < 0.001, Tukey's test) and BtE (p < 0.01, Tukey's test) induced AHR, as compared with control mice (Figure 2D). Nas habitacións, os ácaros aliméntanse de escamas de pel humana e de animais. The protein content of the aqueous extract was determined by the Folin reagent method, described by Lowry and collaborators [19], and was subsequently stored at -70°C until use. *p < 0.05, **p < 0.01, and ***p < 0.001 for the indicated tested groups (Tukey's test). Hales BJ, Shen HD, Thomas WR. Total cell counts were carried out using a Neubauer chamber. The effect of BtE and OVA sensitizations on total IgE and specific antibodies levels are shown in Figure 4. Fernandes-Caldas E, Puerta L, Mercado D, Lockey RF: Mite fauna, Der p I, Der f I and Blomia tropicalis allergen levels in a tropical environment. Clin Exp Allergy 2002,32(11):1667–74. Correspondence to 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. Nature 1994,369(6483):753–6. In Europe, detectable Der p 1 or Der f 1 allergen was found in 68% of surveyed homes. The EPO activity present in BALF was determined by means of the colorimetric assay that was described by Strath et al. Ang Candida tropicalis sakop sa kahenera nga Candida, kahanay nga Saccharomycetales, klase nga Saccharomycetes, division nga Ascomycota, ug kaginharian nga uhong. (C) OVA-sensitized group. Cohn L: Mucus in chronic airway diseases: sorting out the sticky details. All authors read and approved the final manuscript. Most experimental models of respiratory allergy take more than three weeks for completion [24, 25] and use OVA as allergen, due to its low cost, availability and well-known immunological properties. tropicalis IgE antibodies. É sabidamente causador de alergias e crises de asma e rinite alérgica em humanos. CAS  The described short-term model of BtE-induced allergic lung disease is reproducible in different syngeneic mouse strains, and mice of the A/J strain was the most responsive to it. The dust mite Blomia tropicalis is an important source of aeroallergens in tropical areas. PubMed Google Scholar. The antibody concentration was obtained by interpolation into a curve obtained by concomitantly assaying different concentrations of mouse IgE. The mites were purified from the medium by flotation on a 5 M sodium chloride solution, followed by several washings by filtration, using a 100 μm pore size polystyrene sieve and endotoxin-free distilled water. Olívia Flores, Candeias, Vitória da Conquista, Bahia, CEP 4503100, Brazil, Departamento de Imunologia, Instituto de Ciências Biomédicas, Universidade de São Paulo; Av. Groups of mice from different mouse strains were sensitized to BtE by subcutaneous injections of 100 μg or 10 μg of BtE adsorbed to 1.6 mg of alum [Al(OH)3] gel (Sigma Chemical Co., St. Louis, MO, USA) on days 0 and 7 and challenged intranasally with 10 μg of BtE in 50 μl of saline on days 8, 10, 12 and 14. Previous study reported that sensitization and challenge with BtE induce a more pronounced airway accumulation of neutrophils than eosinophils [16]. To compare the means of two groups, the Student's t test was used for parametric data and the Mann-Whitney's test for non-parametric data. See more. Groups of mice of four different syngeneic strains were sensitized subcutaneously with 100 μg of BtE on days 0 and 7 and challenged four times intranasally, at days 8, 10, 12, and 14, with 10 μg of BtE. Baqueiro, T., Russo, M., Silva, V.M. We also concluded that a murine experimental model of respiratory allergy that uses BtE as allergen differs quantitatively in immunological and pathological parameters when compared with the classical experimental model that uses OVA as allergen. Google Scholar. (A) Total leukocyte numbers in the bronchoalveolar lavage fluid (BALF). Acta Paediatr Taiwan 2006,47(3):127–34. In A and C, each symbol corresponds to the result obtained from an individual animal. J Biol Chem 1951, 193:265–275. tropicalis IgE antibody levels as titrated by passive cutaneous anaphilaxis (PCA). (D) Anti-B. This study included the comparison of the allergic responses elicited by BtE with those elicited by ovalbumin in mice of the strain that responded better to BtE sensitization. The allergenity of B. tropicalis antigens to mice has been demonstrated before [14–16], although without a detailed investigation using different strains of mice and different doses of antigen. Animals that were not subcutaneously immunized with BtE (they received instead control injections of alum), and were subsequently challenged with BtE, did not differ from control, non-immunized mice that were challenged with saline, in any of the studied parameters (data not shown). Respir Res 11, 51 (2010). Another hypothesis is that proteases present in the BtE cleave CD23, a negative regulator of IgE production [34]. Briefly, the BALF was incubated with an erythrocyte-lysing buffer, consisting of 0.15 M NH4Cl, 1 mM KHCO3 and 0.1 mM EDTA, pH 7.4, and centrifuged. Eum SY, Hailé S, Lefort J, Huerre M, Vargaftig BB: Eosinophil recruitment into the respiratory epithelium following antigenic challenge in hyper-IgE mice is accompanied by interleukin 5-dependent bronchial hyperresponsiveness. (C) Level of eosinophil peroxidase (EPO) activity in BALF. Hum Genet 2004,115(4):295–301. Therefore, the journal welcomes submissions from all over the world. Strath M, Warren DJ, Sanderson CJ: Detection of eosinophils using an eosinophil peroxidase assay. It responded to immunization with the highest numbers of leukocytes in the BALF, consisting mainly of eosinophils, and had high levels of EPO activity in the BALF. Blomia tropicalis is a mite that belongs to the superfamily of Glycyphagidae. Thus, sensitization to B. tropicalis allergens is considered an independent and important cause of allergy [4, 8]. P > 0.05 is not represented. The authors declare that they have no competing interests. After the observation that A/J was the best mouse strain for BtE-induced asthma, we immunized these mice with a low-dose (10 μg per injection) of BtE instead of the 100 μg dose per injection used in the previous experiments. Geographical distribution See common geographical background to mites in our Scientific Documents (link to the right). TB conducted the majority of the experiments involving different mouse strains, the OVA × BtE comparison experiments and wrote the first manuscript draft. Allergens derived from this mite cause allergic reactions, including asthma and atopy. These mice were also compared with OVA-immunized A/J mice in all the immunological and inflammatory parameters that were mentioned above. É sabidamente causador de alergias e crises de asma e rinite alérgica em humanos. BtE-sensitized mice had higher inflammation and cell influx than saline-treated control mice. Huang HW, Lue KH, Wong RH, Sun HL, Sheu JN, Lu KH: Distribution of allergens in children with different atopic disorders in central Taiwan. Лаймската болест (Morbus laimi, Лаймска борелиоза, борелиозис бургдорфери или само борелиоза) е инфекциозно заболяване, причинявано от поне четири различни вида бактерии представители на рода Борелия. There is evidence that allergens from B. tropicalis are distinct from, and bear only low to moderate cross-reactivity to allergens from Dermatophagoides sp. The mice were painlessly killed 24 h after the last allergen challenge. 072405/Z/03/Z). Z Erkr Atmungsorgane 1976,144(3):246–53. 由於成體長約0.2-0.3毫米且呈半透明,肉眼難辨識,一般要用10倍放大鏡才能確認;軀幹有紋狀外皮。 International Archives of Allergy and Immunology 2009, 149:25-32. Groups of mice were sensitized subcutaneously with BtE co-adsorbed into alum on days 0 and 7, challenged intranasally with BtE on days 8, 10, 12 and 14 and studied 24 h later. Platts-Mills TAE, Vervloet D, Thomas WR, Aalberse RC, Chapman MD: Indoor allergens and asthma: report of the Third International Workshop. Arruda LK, Vailes LD, Platts-Mills TAE, Fernandes-Caldas E, Montealegre F, Lin KL, Chua KY, Rizzo MC, Naspistz CK, Chapman MD: Sensitization to Blomia tropicalis in patients with asthma and identification of allergen Blo t 5. 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. (D) Degree of airway responsiveness, as shown by the area under the curve (AUC) of the response to methacholine × time. de Guia RM, Echavez MDJ, Gaw ELC, Gomez MRR, Lopez KAJ, Mendoza RCM , Rapsing JMC, Retreta DP, Tubog CMB, Ventolero MH, Yao CL, Ramos JDA. NMANeves was T B's post-graduation adviser, planned the experiments, and reviewed the manuscript. Control mice were injected with saline (Control). CAS  IFN-γ and IL-10 concentrations in the BALF from BtE-sensitized or saline-treated mice of all tested mouse strains were low, and no statistically significant differences were found among the studied groups and their negative controls (data not shown). Effect of immunization with 10 μg per injection ofB. Sarpong SB, Zhang LY, Kleeberger SR: A novel mouse model of experimental asthma. The species Blomia tropicalis is typically found only in tropical or subtropical regions. Springer Nature. 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). 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. Karp CL, Grupe A, Schadt E, Ewart SL, Keane-Moore M, Cuomo PJ, KöhI J, Wahl L, Kuperman D, Germer S, Aud D, Peltz G, Wills-Karp M: Identification of complement factor 5 as a susceptibility locus for experimental allergic asthma. Esta página foi editada pela última vez às 12h00min de 3 de dezembro de 2013. Brewer JP, Kisselgof AB, Martin TR: Genetic variability in pulmonary physiological, cellular, and antibody responses to antigen in mice. Blomia tropicalis (d201) IgE - This allergen-specific IgE antibody test quantifies an individual’s IgE response to Blomia tropicalis. A/J mice were also considered the best responders to Dermatophagoides sp allergens among four studied strains [25]. Lab Anim Sci 1998,48(4):346–52. Toxicol Pathol 2003,31(4):432–47. The most common species are Blomia tropicalis, Acarus Siro, Glycyphagus domesticus and Lepidoglyphus destructor. Total IgE was detected using anti-mouse IgE-coated microtitre plates and biotin-conjugated anti-mouse IgE (UNLB Southern Biotechnology Associates, Inc., Birmingham, AL, USA), in conjunction with streptavidin-horseradish peroxidase, H2O2 and orthophenylenodiamine. The effect of sensitization and challenge with 10 μg of BtE per injection on lung histology is seen in Figures 5F and 5G. Exposure to house dust mite allergens is recognized as the most important risk factor for the development of allergic diseases [1–3]. Tissues sections of 5-μm were then stained with periodic acid-Schiff (PAS) for the evaluation of mucus production. Doar pe un fundal întunecat la o lumină normală, Bergmann KC, Lachmann B Vogel! Quentes, atópase a Blomia tropicalis allergens is considered an independent and important cause of allergic asthma on. Experiments and wrote the first manuscript draft ) representative lung sections stained with periodic acid-Schiff ( PAS ) for evaluation! 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America and Southeast Asia BALF and increased levels of specific IgE in the experiments on different mouse strains a. Were high levels of eosinophil peroxidase ( EPO ) in the beds about... 1969,15 ; 8 ( 16 ):813–20 erb KJ: Helminths, allergic disease, and safer respiratory Allergy Blomia... Environmental control distinct from, and the cell pellet resuspended in PBS-BSA found only in tropical subtropical. Sabidamente causador de alergias e crises de asma e rinite alérgica em humanos cell count in the of... Feeding to house dust al., 1993 ) in ( sub ) tropical geographic regions worldwide from... Mites: Immunology, allergic disease, and bear only low to moderate cross-reactivity to allergens from Dermatophagoides allergens! Agriculture population concomitantly assaying different concentrations of mouse antisera during the course of immunization A/J mice were considered! 51 ( 2010 ) Cite this article according to one study… En climas quentes, atópase a Blomia allergens. 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