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Asthma challenge model

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https://www.readbyqxmd.com/read/29158683/animal-models-of-asthma-utility-and-limitations
#1
REVIEW
Marcelo Vivolo Aun, Rafael Bonamichi-Santos, Fernanda Magalhães Arantes-Costa, Jorge Kalil, Pedro Giavina-Bianchi
Clinical studies in asthma are not able to clear up all aspects of disease pathophysiology. Animal models have been developed to better understand these mechanisms and to evaluate both safety and efficacy of therapies before starting clinical trials. Several species of animals have been used in experimental models of asthma, such as Drosophila, rats, guinea pigs, cats, dogs, pigs, primates and equines. However, the most common species studied in the last two decades is mice, particularly BALB/c. Animal models of asthma try to mimic the pathophysiology of human disease...
2017: Journal of Asthma and Allergy
https://www.readbyqxmd.com/read/29157860/advances-in-rhinitis-models-and-mechanisms
#2
REVIEW
Anne K Ellis, Mark W Tenn
OBJECTIVE: To summarize studies highlighting recent advances in rhinitis-related research in the past 2 years. DATA SOURCES: Original research articles were procured and examined from the Rhinitis and Upper Airway Disease section of the 2015 to 2017 Annals of Allergy, Asthma & Immunology issues. Additional original research articles were identified from PubMed and Google Scholar using the following search terms: allergic rhinitis, rhinitis, chronic rhinosinusitis, environmental exposure unit, and nasal allergen challenge...
November 18, 2017: Annals of Allergy, Asthma & Immunology
https://www.readbyqxmd.com/read/29147824/an-integrated-qsar-modeling-approach-to-explore-the-structure-property-and-selectivity-relationships-of-n-benzoyl-l-biphenylalanines-as-integrin-antagonists
#3
Sk Abdul Amin, Nilanjan Adhikari, Sonam Bhargava, Shovanlal Gayen, Tarun Jha
Integrins [Formula: see text] and [Formula: see text] are important targets to treat different inflammatory diseases, such as multiple sclerosis, inflammatory bowel diseases, rheumatoid arthritis, atherosclerosis, and asthma. Despite being valuable targets, only a few work has been reported to date regarding molecular modeling studies on these integrins. Not only that, none of these reports addressed the selectivity issue between integrins [Formula: see text] and [Formula: see text]. Therefore, a major challenge regarding the design and discovery of selective integrin antagonists remains...
November 17, 2017: Molecular Diversity
https://www.readbyqxmd.com/read/29140131/effects-of-inhaled-corticosteroids-on-the-expression-of-tnf-family-molecules-in-murine-model-of-allergic-asthma
#4
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/29132960/influenza-derived-peptides-cross-react-with-allergens-and-provide-asthma-protection
#5
Chrysanthi Skevaki, Christoph Hudemann, Mikhail Matrosovich, Christian Möbs, Sinu Paul, Andreas Wachtendorf, Bilal Alashkar Alhamwe, Daniel P Potaczek, Stefanie Hagner, Diethard Gemsa, Holger Garn, Alessandro Sette, Harald Renz
BACKGROUND: The hygiene hypothesis is the leading concept to explain the current asthma epidemic, which is built on the observation that a lack of bacterial contact early in life induces allergic Th2 immune responses. OBJECTIVE: Since little is known about the contribution of respiratory viruses in this context, we evaluated the effect of prior influenza-infection on the development of allergic asthma. METHODS: Mice were infected with influenza and once recovered, subjected to an ovalbumin or house dust mite-induced experimental asthma protocol...
November 10, 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/29130799/allergen-immunotherapy-modulates-sensitivity-of-treg-cells-to-apoptosis-in-a-rat-model-of-allergic-asthma
#6
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/29127369/suppression-of-th17-polarized-airway-inflammation-by-rapamycin
#7
Oana Joean, Anja Hueber, Felix Feller, Adan Chari Jirmo, Matthias Lochner, Anna-Maria Dittrich, Melanie Albrecht
Because Th17-polarized airway inflammation correlates with poor control in bronchial asthma and is a feature of numerous other difficult-to-treat inflammatory lung diseases, new therapeutic approaches for this type of airway inflammation are necessary. We assessed different licensed anti-inflammatory agents with known or expected efficacy against Th17-polarization in mouse models of Th17-dependent airway inflammation. Upon intravenous transfer of in vitro derived Th17 cells and intranasal challenge with the corresponding antigen, we established acute and chronic murine models of Th17-polarised airway inflammation...
November 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29123222/the-independent-effects-of-vitamin-d-deficiency-and-house-dust-mite-exposure-on-lung-function-are-sex-specific
#8
Nailê K Nuñez, Ellen Bennett, Ling Chen, Paulo Márcio Pitrez, Graeme R Zosky
Vitamin D deficiency is increasing around the world and has been associated with the development of asthma. This study aims to evaluate the effect of dietary vitamin D deficiency at different life stages on lung function using a murine model of allergic airways disease. BALB/c mice were challenged intranasally with HDM or saline alone for 10 days. Twenty four hours after the last challenge, mice were anesthetized and lung function was measured using the forced oscillation technique (FOT). Mice were euthanized for assessment of inflammation in the bronchoalveolar lavage (BAL) and total collagen content in lung homogenates by ELISA...
November 9, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29123203/respiratory-syncytial-virus-exacerbates-ova-mediated-asthma-in-mice-through-c5a-c5ar-regulating-cd4-t-cells-immune-responses
#9
Xinyue Hu, Xiaozhao Li, Chengping Hu, Ling Qin, Ruoxi He, Lisha Luo, Wei Tang, Juntao Feng
Asthma exacerbation could be induced by respiratory syncytial virus (RSV), and the underlying pathogenic mechanism is related to complement activation. Although complement might regulate CD4(+)T cells immune responses in asthma model, this regulation existed in RSV-induced asthma model remains incompletely characterrized. In this study, we assessed the contribution of C5a-C5aR to CD4(+)T cell immune responses in RSV-infected asthma mice. Female BALB/C mice were sensitized and challenged with ovalbumin (OVA) while treated with RSV infection and C5a receptor antagonist (C5aRA) during challenge period...
November 9, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29111218/the-notch-pathway-inhibitor-sahm1-abrogates-the-hallmarks-of-allergic-asthma
#10
Alex KleinJan, Irma Tindemans, Jeffrey E Montgomery, Melanie Lukkes, Marjolein J W de Bruijn, Menno van Nimwegen, Ingrid Bergen, Raymond E Moellering, Henk C Hoogsteden, Louis Boon, Derk Amsen, R W Hendriks
BACKGROUND: The Notch signaling pathway has been implicated in the pathogenesis of allergic airway inflammation. Targeting the active Notch transactivation complex by the cell-permeable, hydrocarbon-stapled synthetic peptide SAHM1 was results in genome-wide suppression of Notch-activated genes in leukemic cells and other models. However, efficacy of SAHM1 in allergic asthma models has remained unexplored. OBJECTIVE: We aimed to investigate therapeutic efficacy of SAHM1 in a house dust mite (HDM)-driven asthma model...
October 27, 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/29111212/mcpip1-controls-allergic-airway-inflammation-by-suppressing-il-5-producing-th2-cells-through-notch-gata3-pathway
#11
Hui Peng, Huan Ning, Qinghong Wang, Wenbao Lu, Yingzi Chang, Tony T Wang, Jinping Lai, Pappachan E Kolattukudy, Rong Hou, Daniel F Hoft, Mark S Dykewicz, Jianguo Liu
BACKGROUND: Asthmatic and allergic inflammation is mediated by Th2 cytokines (IL-4, IL-5 and IL-13). Though we have learned much about how Th2 cells are differentiated, the Th2 checkpoint mechanisms remain elusive. OBJECTIVES: In this study, we investigate how monocyte chemotactic protein induced protein-1 (MCPIP1, encoded by zc3h12a gene) regulates IL-5-producing Th2 cell differentiation and Th2-mediated inflammation. METHODS: The functions of zc3h12a(-/-) CD4 T cells were evaluated by checking the expression of Th2 cytokines and transcription factors in vivo and in vitro...
October 27, 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/29106951/localized-real-time-information-on-outdoor-air-quality-at-kindergartens-in-oslo-norway-using-low-cost-sensor-nodes
#12
Nuria Castell, Philipp Schneider, Sonja Grossberndt, Mirjam F Fredriksen, Gabriela Sousa-Santos, Mathias Vogt, Alena Bartonova
In Norway, children in kindergartens spend significant time outdoors under all weather conditions, and there is thus a natural concern about the quality of outdoor air. It is well known that air pollution is associated with a wide variety of adverse health impacts for children, with greater impact on children with asthma. Especially during winter and spring, kindergartens in Oslo that are situated close to streets with busy traffic, or in areas where wood burning is used for house heating, can experience many days with bad air quality...
October 26, 2017: Environmental Research
https://www.readbyqxmd.com/read/29104649/small-interfering-rna-directed-against-microrna-155-delivered-by-a-lentiviral-vector-attenuates-asthmatic-features-in-a-mouse-model-of-allergic-asthma
#13
Huilong Chen, Xiangqin Xu, Sheng Cheng, Yuzhu Xu, Qi Xuefei, Yong Cao, Jungang Xie, Cong-Yi Wang, Yongjian Xu, Weining Xiong
Asthma is a chronic T helper type 2 (Th2) cell-mediated inflammatory disease characterized by airway hyperresponsiveness (AHR) and airway inflammation. Although the majority of patients with asthma can achieve a good level of control with existing treatments, asthma runs a chronic course and the effectiveness of current treatment is not satisfactory for certain patients. MicroRNAs (miRNAs) are short noncoding RNAs that suppress gene expression at the post-transcriptional level; their role in regulating allergic inflammation remains largely unknown...
November 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29094375/collaborative-targeted-learning-using-regression-shrinkage
#14
Mireille E Schnitzer, Matthew Cefalu
Causal inference practitioners are routinely presented with the challenge of model selection and, in particular, reducing the size of the covariate set with the goal of improving estimation efficiency. Collaborative targeted minimum loss-based estimation (CTMLE) is a general framework for constructing doubly robust semiparametric causal estimators that data-adaptively limit model complexity in the propensity score to optimize a preferred loss function. This stepwise complexity reduction is based on a loss function placed on a strategically updated model for the outcome variable through which the error is assessed using cross-validation...
November 2, 2017: Statistics in Medicine
https://www.readbyqxmd.com/read/29091859/vitexin-inhibits-inflammation-in-murine-ovalbumin-induced-allergic-asthma
#15
Cláudio Luís Venturini, Antonio Macho, Karuppusamy Arunachalam, Danielle Ayr Tavares de Almeida, Suellen Iara Guirra Rosa, Eduarda Pavan, Sikiru Olaitan Balogun, Amílcar Sabino Damazo, Domingos Tabajara de Oliveira Martins
Vitexin is an important component of various medicinal plants frequently used to treat asthma, such as Crataegus spp., Vitex spp., Passiflora spp., and Echinodorus spp. However, there is no information about the vitexin potential as anti-asthmatic. The aim of the present work was to evaluate the anti-hypersensitive activity of vitexin in a murine ovalbumin (OVA)-induced allergic asthma model. Mice were sensitized to OVA by i.p. injection on days 1st and 10th, followed by a daily challenge with OVA using a nebulizer, from days 19th to 24th...
October 25, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29089616/exacerbation-of-ventilation-induced-lung-injury-and-inflammation-in-preterm-lambs-by-high-dose-nanoparticles
#16
Ishmael M Inocencio, Robert J Bischof, Sue D Xiang, Valerie A Zahra, Vy Nguyen, Tammy Lim, Domenic LaRosa, Jade Barbuto, Mary Tolcos, Magdalena Plebanski, Graeme R Polglase, Timothy J Moss
Mechanical ventilation of preterm neonates causes lung inflammation and injury, with potential life-long consequences. Inert 50-nm polystyrene nanoparticles (PS50G) reduce allergic inflammation in the lungs of adult mice. We aimed to confirm the anti-inflammatory effects of PS50G in a sheep asthma model, and investigate the effects of prophylactic administration of PS50G on ventilation-induced lung injury (VILI) in preterm lambs. We assessed lung inflammatory cell infiltration, with and without PS50G, after airway allergen challenge in ewes sensitised to house dust mite...
October 31, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29082668/breathomics-from-exhaled-volatile-organic-compounds-in-pediatric-asthma
#17
REVIEW
Anne H Neerincx, Susanne J H Vijverberg, Lieuwe D J Bos, Paul Brinkman, Marc P van der Schee, Rianne de Vries, Peter J Sterk, Anke-Hilse Maitland-van der Zee
Asthma is the most common chronic disease in children, and is characterized by airway inflammation, bronchial hyperresponsiveness, and airflow obstruction. Asthma diagnosis, phenotyping, and monitoring are still challenging with currently available methods, such as spirometry, FE NO or sputum analysis. The analysis of volatile organic compounds (VOCs) in exhaled breath could be an interesting non-invasive approach, but has not yet reached clinical practice. This review describes the current status of breath analysis in the diagnosis and monitoring of pediatric asthma...
December 2017: Pediatric Pulmonology
https://www.readbyqxmd.com/read/29079726/srage-alleviates-neutrophilic-asthma-by-blocking-hmgb1-rage-signalling-in-airway-dendritic-cells
#18
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/29073215/toxoplasma-gondii-serine-protease-inhibitor-1-a-new-adjuvant-candidate-for-asthma-therapy
#19
Ariadna S Soto, Ignacio M Fenoy, Vanesa R Sanchez, Florencia March, Matías D Perrone Sibilia, María de Los Angeles Aldirico, Mariano S Picchio, Nadia Arcon, Patricio L Acosta, Fernando P Polack, Valentina Martin, Alejandra Goldman
Serine-proteases are important players in the pathogenesis of asthma, promoting inflammation and tissue remodeling. It's also known that many serine protease inhibitors display immunomodulatory properties. TgPI-1 is a Toxoplasma gondii protein that exhibits broad spectrum inhibitory activity against serine proteases. In view of the increased prevalence of atopic disorders and the need to develop new treatment strategies we sought to investigate the potential of TgPI-1 for treating respiratory allergies. For this purpose, we developed a therapeutic experimental model...
2017: PloS One
https://www.readbyqxmd.com/read/29070458/-receptor-for-advanced-glycation-end-products-upregulates-muc5ac-expression-and-promotes-mucus-overproduction-in-mice-with-toluene-diisocyanate-induced-asthma
#20
Jing Xiong, Wen-Qu Zhao, Guo-Hua Huang, Li-Hong Yao, Hang-Ming Dong, Chang-Hui Yu, Hai-Jin Zhao, Shao-Xi Cai
OBJECTIVE: To explore the role of the receptor for advanced glycation end products (RAGE) in regulating the expression of MUC5AC and mucus production in a mouse model of toluene diisocyanate (TDI)?induced asthma. METHODS: BALB/c mice were randomly divided into control group, vehicle (AOO) group, TDI?induced asthma group and RAGE inhibitor (FPS?ZM1) group. PAS staining, Western blotting, and immunohistochemistry were used to analyze the changes in mucus production and MUC5AC expression in the airway of the mice, and the expression of p?ERK was detected with Western blotting...
October 20, 2017: Nan Fang Yi Ke da Xue Xue Bao, Journal of Southern Medical University
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