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Allergen asthma challenge study

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https://www.readbyqxmd.com/read/29140131/effects-of-inhaled-corticosteroids-on-the-expression-of-tnf-family-molecules-in-murine-model-of-allergic-asthma
#1
Fei Shi, Yarui Zhang, Chen Qiu, Yi Xiong, Manhui Li, Aijun Shan, Ying Yang, Binbin Li
BACKGROUND: The tumor necrosis factor superfamily member LIGHT (the official gene symbol approved by NCBI Gene Database), an inflammatory factor secreted by T cells after allergen exposure, recently discovered to play crucial roles in asthmatic airway remodeling. However, it is unclear whether LIGHT could be controlled by inhaled corticosteroids, a key component of asthma management. This study was to investigate the effects and potential mechanisms of inhaled budesonide on the expressions of LIGHT and its receptors (LTβR and HVEM) of lung tissues in ovalbumin-sensitized mice...
October 2017: Experimental Lung Research
https://www.readbyqxmd.com/read/29130799/allergen-immunotherapy-modulates-sensitivity-of-treg-cells-to-apoptosis-in-a-rat-model-of-allergic-asthma
#2
Ankur Datta, Saibal Moitra, Prasanta K Das, Somnath Mondal, Sk Md Omar Faruk, Iman Hazra, Santanu K Tripathi, Swapna Chaudhuri
AIM: To study the apoptosis of Foxp3(+) Treg cells following Alstonia scholaris pollen sensitization-challenge and following allergen immunotherapy. MATERIALS & METHODS: Wistar rats were sensitized-challenged with Alstonia scholaris pollen and were further given intranasal immunotherapy. For the analysis of the apoptotic proteins on Treg cells by flow cytometry, multiple gating procedures were followed. RESULTS: Allergen sensitization-challenge increases Annexin-V, Fas, FasL, caspases-8, 9, 3 cytochrome-C, APAF-1, Bax, perforin-1 and granzyme-B on Treg cells which is decreased following intranasal immunotherapy...
November 2017: Immunotherapy
https://www.readbyqxmd.com/read/29105205/enhanced-antigen-presenting-and-t-cell-functions-during-late-phase-allergic-responses-in-the-lung
#3
Mark C Liu, HuiQing Xiao, Linda Breslin, Bruce Bochner, John Schroeder
BACKGROUND: Allergic inflammation is a common feature of asthma and may contribute to both development and perpetuation of disease. The interaction of antigen presenting cells (APC) with sensitized helper T lymphocytes (TC) producing Th2 cytokines may determine the inflammatory response. Recruitment of APC and TC to the lung during allergic responses has been demonstrated, but functional studies in humans have been limited. OBJECTIVE: This study examined the function of APC and TC accumulating at sites of inflammation after segmental allergen challenge (SAC)...
November 3, 2017: Clinical and Experimental Allergy: Journal of the British Society for Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/29093714/toll-like-receptor-4-is-essential-for-the-expression-of-sphingosine-1-phosphate-dependent-asthma-like-disease-in-mice
#4
Fiorentina Roviezzo, Rosalinda Sorrentino, Michela Terlizzi, Maria Antonietta Riemma, Valentina Mattera Iacono, Antonietta Rossi, Giuseppe Spaziano, Aldo Pinto, Bruno D'Agostino, Giuseppe Cirino
Sphingosine-1-phosphate (S1P) levels significantly increase in bronchoalveolar lavage (BAL) of asthmatic patients following segmental allergen challenge and this increase well correlates with pulmonary inflammation. Epidemiological, genetic, clinical, and experimental data indicate a potential for the toll-like receptor 4 (TLR4) to initiate and exacerbate allergic airway diseases. The aim of this study was to evaluate the contribution of TLR4 in S1P-dependent asthma-like disease in mice. BALB/c or TLR4 defective (C3H/HeJ) mice received S1P (10 ng/mouse), LPS (0...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/29079726/srage-alleviates-neutrophilic-asthma-by-blocking-hmgb1-rage-signalling-in-airway-dendritic-cells
#5
Fang Zhang, Xin Su, Gang Huang, Xiao-Feng Xin, E-Hong Cao, Yi Shi, Yong Song
Receptor for advanced glycation end products (RAGE) plays a role in inflammatory reactions. The soluble form of RAGE (sRAGE) acts as a decoy to inhibit interactions of RAGE with advanced glycation end products such as High mobility group box 1 (HMGB1). We have demonstrated that HMGB1 directs Th17 skewing by regulating dendritic cell (DC) functions in a previous study. However, the protective effects of HMGB1 blockade with sRAGE in the development of neutrophilic asthma remain unclear. Here, we showed that allergen challenge decreased expression of sRAGE in a murine model of neutrophilic asthma, correlating well with neutrophil counts and interleukin (IL)-17 production...
October 27, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29068567/therapeutic-administration-of-bone-marrow-derived-mesenchymal-stromal-cells-reduces-airway-inflammation-without-upregulating-tregs-in-experimental-asthma
#6
Jamil Z Kitoko, Ligia L de Castro, Ana P Nascimento, Soraia C Abreu, Fernanda F Cruz, Ana C Arantes, Debora G Xisto, Marco A Martins, Marcelo M Morales, Patricia R M Rocco, Priscilla C Olsen
BACKGROUND: Prophylactic administration of mesenchymal stromal cells (MSCs) derived from adipose (AD-MSC) and bone marrow tissue (BM-MSC) in ovalbumin-induced asthma hinders inflammation in a Treg-dependent manner. It is uncertain whether MSCs act through Tregs when inflammation is already established in asthma induced by a clinically relevant allergen. OBJECTIVE: Evaluate the effect of therapeutic administration of MSCs on inflammation and Treg cells in house dust mite (HDM)-induced asthma...
October 25, 2017: Clinical and Experimental Allergy: Journal of the British Society for Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/29062168/illicium-verum-extract-and-trans-anethole-attenuate-ovalbumin-induced-airway-inflammation-via-enhancement-of-foxp3-regulatory-t-cells-and-inhibition-of-th2-cytokines-in-mice
#7
Yoon-Young Sung, Seung-Hyung Kim, Dong-Seon Kim, Ji-Eun Lee, Ho Kyoung Kim
Illicium verum is used in traditional medicine to treat inflammation. The study investigates the effects of IVE and its component, trans-anethole (AET), on airway inflammation in ovalbumin- (OVA-) induced asthmatic mice. Asthma was induced in BALB/c mice by systemic sensitization to OVA, followed by intratracheal, intraperitoneal, and aerosol allergen challenges. IVE and AET were orally administered for four weeks. We investigated the effects of treatment on airway hyperresponsiveness, IgE production, pulmonary eosinophilic infiltration, immune cell phenotypes, Th2 cytokine production in bronchoalveolar lavage, Th1/Th2 cytokine production in splenocytes, forkhead box protein 3 (Foxp3) expression, and lung histology...
2017: Mediators of Inflammation
https://www.readbyqxmd.com/read/29054692/plasmacytoid-dendritic-cells-drive-acute-exacerbations-of-asthma
#8
Aikaterini-Dimitra Chairakaki, Maria-Ioanna Saridaki, Katerina Pyrillou, Marios-Angelos Mouratis, Ourania Koltsida, Ross P Walton, Nathan W Bartlett, Athanasios Stavropoulos, Louis Boon, Nikoletta Rovina, Nikolaos G Papadopoulos, Sebastian L Johnston, Evangelos Andreakos
BACKGROUND: Although acute exacerbations, mostly triggered by viruses, account for the majority of hospitalizations in asthma, there is still very little known about the pathophysiological mechanisms involved. Plasmacytoid DCs (pDCs), prominent cells of antiviral immunity, exhibit pro-inflammatory or tolerogenic functions depending on the context, yet their involvement in asthma exacerbations remains unexplored. OBJECTIVES: We sought to investigate the role of pDCs in allergic airway inflammation and acute exacerbations of asthma...
October 17, 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/29038008/fibrinogen-cleavage-products-and-toll-like-receptor-4-promote-the-generation-of-programmed-cell-death-1-ligand-2-positive-dendritic-cells-in-allergic-asthma
#9
Minkyoung Cho, Jeong-Eun Lee, Hoyong Lim, Hyun-Woo Shin, Roza Khalmuratova, Garam Choi, Hyuk Soon Kim, Wahn Soo Choi, Young-Jun Park, Inbo Shim, Byung-Seok Kim, Chang-Yuil Kang, Jae-Ouk Kim, Shinya Tanaka, Masato Kubo, Yeonseok Chung
BACKGROUND: Inhaled protease allergens preferentially trigger TH2-mediated inflammation in allergic asthma. The role of dendritic cells (DCs) on induction of TH2 cell responses in allergic asthma has been well documented; however, the mechanism by which protease allergens induce TH2-favorable DCs in the airway remains unclear. OBJECTIVE: We sought to determine a subset of DCs responsible for TH2 cell responses in allergic asthma and the mechanism by which protease allergens induce the DC subset in the airway...
October 14, 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/29037302/feno-levels-increase-with-degree-of-sensitisation-in-apprentices-at-risk-of-occupational-asthma
#10
P Wild, H Mével, E Penven, D Zmirou-Navier, A Barbaud, A Bohadana, C Paris
BACKGROUND: Atopy has emerged as a major determinant of airway inflammation. OBJECTIVE: To examine whether early markers of occupational asthma increase with degree of sensitisation. METHOD: This study was a prospective follow-up study of apprentices in baking, pastry-cooking and hairdressing during their 2-year apprenticeship. Four visits were conducted to administer a standardised questionnaire, a methacholine challenge test to assess bronchial hyperresponsiveness (BHR) and to measure fractional exhaled nitric oxide (FeNO)...
November 1, 2017: International Journal of Tuberculosis and Lung Disease
https://www.readbyqxmd.com/read/29017902/small-percentage-of-anaphylactic-reactions-treated-with-epinephrine-during-food-challenges-in-dutch-children
#11
Johanna P M van der Valk, Irene Berends, Roy Gerth van Wijk, Nicolette J T Arends, Maurits S van Maaren, Hans de Groot, Harry J Wichers, Joyce A M Emons, Anthony E J Dubois, Nicolette W de Jong
BACKGROUND: Severe allergic reactions, including anaphylaxis, occur during oral food challenges (OFCs) and the first-line treatment of anaphylaxis is epinephrine. OBJECTIVE: To evaluate the percentage of anaphylactic reactions treated with epinephrine during OFCs and to identify associated factors for the administration of epinephrine. METHODS: Children who underwent an OFC with peanut, hazelnut, cow's milk, hen's egg, or cashew nut from 2005 through 2015 in the Netherlands were evaluated...
October 7, 2017: Annals of Allergy, Asthma & Immunology
https://www.readbyqxmd.com/read/28979688/the-role-of-il-25-in-the-reduction-of-oxidative-stress-and-the-apoptosis-of-airway-epithelial-cells-with-specific-immunotherapy-in-an-asthma-mouse-model
#12
Xiefang Yuan, Eryi Wang, Xiaojun Xiao, Junyi Wang, Xiaomeng Yang, Pingchang Yang, Guoping Li, Zhigang Liu
Oxidative stress and cell apoptosis play important roles in the pathogenesis of asthma. Specific immunotherapy (SIT) is the only curative approach for asthma and is effective at decreasing asthmatic oxidation and cell apoptosis, but the mechanisms remain unclear. In this study, by using in vivo and in vitro models, we indirectly demonstrated that SIT alleviated the apoptosis and oxidative stress of bronchial epithelial cells in an asthma model through regulating interleukin (IL)-25. Female BALB/c mice were used for an asthma model induced by exposure to house dust mite (HDM) extracts as allergens...
2017: American Journal of Translational Research
https://www.readbyqxmd.com/read/28978148/allergen-specific-immunotherapy-enhanced-defense-against-bacteria-via-tgf-%C3%AE-1-induced-cyp27b1-in-asthma
#13
Junyi Wang, Xiaoyu Liu, Hui Wang, Yin Li, Nan Lan, Xiefang Yuan, Min Wu, Zhigang Liu, Guoping Li
Allergen specific immunotherapy (SIT) is the only specific treatment of allergic diseases at present. How SIT impacts pulmonary innate immunity against bacteria currently remains unclear. In this study, dust mite extracts (HDM)-sensitized mice were immunized with a subcutaneous injection of HDM. These mice were then challenged with an intranasal administration of HDM. After the last challenge, mice were infected with an intranasal instillation with P. aeruginosa (P.a). We measured the score of tissue inflammation, the expression of cathelicidin-related antimicrobial peptide (CRAMP) and 25-Hydroxyvitamin D-1Alpha-hydroxylase (CYP27B1) in lung...
September 15, 2017: Oncotarget
https://www.readbyqxmd.com/read/28962133/comparison-of-the-roles-of-house-dust-mite-allergens-ovalbumin-and-lipopolysaccharides-in-the-sensitization-of-mice-to-establish-a-model-of-severe-neutrophilic-asthma
#14
Aijun Jia, Yueling Wang, Wenjin Sun, Bing Xiao, Lin Mu, Yan Wei, Li Xu, Cong Peng, Dongshan Zhang, Huahao Shen, Xudong Xiang
Neutrophilic asthma (NA) is associated with a severe disease course and poor response to corticosteroids. The present study aimed to compare the effects of various concentrations of house dust mite (HDM) allergens, ovalbumin (OVA), the major egg allergen, and lipopolysaccharide (LPS) in combination on the onset of severe NA. Female C57BL/6 mice were grouped according to a random number table and intranasally sensitized with HDM/LPS/OVA extracts on days 0, 1 and 2 of the study. In group 1, mice received 50 µg HDM + 50 µg OVA + 15 µg LPS, mice in group 2 received 50 µg HDM + 100 µg OVA + 15 µg LPS, mice in group 3 received 100 µg HDM + 50 µg OVA + 15 µg LPS and those in group 4 received 100 µg HDM + 100 µg OVA + 15 µg LPS, while mice in the control group received saline only...
September 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28947906/oral-food-challenge-outcomes-in-a-pediatric-tertiary-care-center
#15
Elissa M Abrams, Allan B Becker
BACKGROUND: Oral food challenges are the clinical standard for diagnosis of food allergy. Little data exist on predictors of oral challenge failure and reaction severity. METHODS: A retrospective chart review was done on all pediatric patients who had oral food challenges in a tertiary care pediatric allergy clinic from 2008 to 2010. RESULTS: 313 oral challenges were performed, of which the majority were to peanut (105), egg (71), milk (41) and tree nuts (29)...
2017: Allergy, Asthma, and Clinical Immunology
https://www.readbyqxmd.com/read/28943467/concomitant-suppression-of-th2-and-th17%C3%A2-cell-responses-in-allergic-asthma-by-targeting-retinoic-acid-receptor-related-orphan-receptor-%C3%AE-t
#16
Hyeongjin Na, Hoyong Lim, Garam Choi, Byung-Keun Kim, Sae-Hoon Kim, Yoon-Seok Chang, Roza Nurieva, Chen Dong, Seon Hee Chang, Yeonseok Chung
BACKGROUND: Allergic asthma is a heterogeneous chronic inflammatory disease of the airways with a massive infiltration of eosinophils or neutrophils mediated by allergen-specific TH2 and TH17 cells, respectively. Therefore successful treatment of allergic asthma will require suppression of both TH2 and TH17 cells. OBJECTIVE: We sought to investigate the role of the TH17 cell pathway in regulating TH2 cell responses in allergic asthma. METHODS: Allergic asthma was induced by intranasal challenge with proteinase allergens in C57BL/6, Il17a(-/-)Il17f(-/-), and retinoic acid receptor-related orphan receptor γt (RORγt)(gfp/gfp) mice...
September 22, 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28928485/increased-trem-2-expression-on-the-subsets-of-cd11c-cells-in-the-lungs-and-lymph-nodes-during-allergic-airway-inflammation
#17
Sannette C Hall, Devendra K Agrawal
Dendritic cells (DCs) are professional APCs that traffic to the draining lymph nodes where they present processed antigens to naïve T-cells. The recently discovered triggering receptor expressed on myeloid cells (TREM)-2 has been shown to be expressed on DCs in several disease models, however, its role in asthma is yet to be elucidated. In the present study, we examined the effect of allergen exposure on TREM-2 expression in the airways and on DC subsets in the lung and lymph nodes in murine model of allergic airway inflammation...
September 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28915873/a-prospective-cohort-study-on-ambient-air-pollution-and-respiratory-morbidities-including-childhood-asthma-in-adolescents-from-the-western-cape-province-study-protocol
#18
Toyib Olaniyan, Mohamed Jeebhay, Martin Röösli, Rajen Naidoo, Roslynn Baatjies, Nino Künzil, Ming Tsai, Mark Davey, Kees de Hoogh, Dilys Berman, Bhawoodien Parker, Joy Leaner, Mohamed Aqiel Dalvie
BACKGROUND: There is evidence from existing literature that ambient air pollutant exposure in early childhood likely plays an important role in asthma exacerbation and other respiratory symptoms, with greater effect among asthmatic children. However, there is inconclusive evidence on the role of ambient air pollutant exposures in relation to increasing asthma prevalence as well as asthma induction in children. At the population level, little is known about the potential synergistic effects between pollen allergens and air pollutants since this type of association poses challenges in uncontrolled real life settings...
September 16, 2017: BMC Public Health
https://www.readbyqxmd.com/read/28913990/association-between-sensitization-to-mold-and-impaired-pulmonary-function-in-children-with-asthma
#19
Jung Hye Byeon, Soohyun Ri, Oyuntulga Amarsaikhan, Eunji Kim, So Hyun Ahn, Ic Sun Choi, Hyung Jin Kim, SungChul Seo, Wonsuck Yoon, Young Yoo
PURPOSE: Recent data indicate that sensitization to mold contributes to the severity and persistence of asthma. In this study, we investigated the relationships between sensitization to mold and lung function parameters in children with asthma. METHODS: We retrospectively reviewed clinical data from 551 asthmatic subjects. We selected subjects who met clinical diagnostic criteria of asthma. Their spirometry, methacholine challenge tests, and measurements of blood eosinophils, serum IgE, eosinophil cationic protein (ECP) and fractional exhaled nitric oxide (FeNO) results were included...
November 2017: Allergy, Asthma & Immunology Research
https://www.readbyqxmd.com/read/28887522/urban-pm2-5-exacerbates-allergic-inflammation-in-the-murine-lung-via-a-tlr2-tlr4-myd88-signaling-pathway
#20
Miao He, Takamichi Ichinose, Yasuhiro Yoshida, Keiichi Arashidani, Seiichi Yoshida, Hirohisa Takano, Guifan Sun, Takayuki Shibamoto
Nevertheless its mechanism has not been well explained yet, PM2.5 is recognized to exacerbate asthma. In the present study, the roles of toll-like receptor (TLR) 2, TLR4 and MyD88, in exacerbation of allergen-induced lung eosinophilia caused by urban PM2.5 was investigated. TLR2-, TLR4-, MyD88-deficient and WT BALB/c mice were intratracheally challenged with PM2.5 +/- ovalbumin (OVA) four times at 2-week intervals. PM2.5 increased neutrophil numbers and KC in bronchoalveolar lavage fluid and caused slight peribronchiolar inflammation in WT mice...
September 8, 2017: Scientific Reports
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