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Asthma challenge model

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https://www.readbyqxmd.com/read/28543436/prenatal-environmental-tobacco-smoke-exposure-increases-allergic-asthma-risk-with-methylation-changes-in-mice
#1
Sonja Christensen, Zeina Jaffar, Elizabeth Cole, Virginia Porter, Maria Ferrini, Britten Postma, Kent E Pinkerton, Mihi Yang, Yang Jee Kim, Luke Montrose, Kevan Roberts, Andrij Holian, Yoon Hee Cho
Allergic asthma remains an inadequately understood disease. In utero exposure to environmental tobacco smoke (ETS) has been identified as an environmental exposure that can increase an individual's asthma risk. To improve our understanding of asthma onset and development, we examined the effect of in utero ETS exposure on allergic disease susceptibility in an asthmatic phenotype using a house dust mite (HDM) allergen-induced murine model. Pregnant C57BL/6 mice were exposed to either filtered air or ETS during gestation, and their offspring were further exposed to HDM at 6-7 weeks old to induce allergic inflammation...
May 25, 2017: Environmental and Molecular Mutagenesis
https://www.readbyqxmd.com/read/28516728/increased-heterogeneity-of-airway-calibre-in-adult-rats-after-hypoxia-induced-intrauterine-growth-restriction
#2
Kimberley C W Wang, Jude S Morton, Sandra T Davidge, Alexander N Larcombe, Alan L James, Graham M Donovan, Peter B Noble
BACKGROUND AND OBJECTIVE: Intrauterine growth restriction (IUGR) is associated with asthma development. We hypothesized that IUGR disrupts airway development leading to postnatal structural abnormalities of the airway that predispose to disease. This study therefore examined structural changes to the airway and lung in a rat model of maternal hypoxia-induced IUGR. METHODS: Pregnant rats were housed under hypoxic conditions (11.5% O2 ) from gestational days (GDs) 13 to 20 (pseudoglandular-canalicular stages, i...
May 17, 2017: Respirology: Official Journal of the Asian Pacific Society of Respirology
https://www.readbyqxmd.com/read/28515363/lung-cd103-dendritic-cells-restrain-allergic-airway-inflammation-through-il-12-production
#3
Laura Conejero, Sofía C Khouili, Sarai Martínez-Cano, Helena M Izquierdo, Paola Brandi, David Sancho
DCs are necessary and sufficient for induction of allergic airway inflammation. CD11b+ DCs direct the underlying Th2 immunity, but debate surrounds the function of CD103+ DCs in lung immunity and asthma after an allergic challenge. We challenged Batf3-/- mice, which lacked lung CD103+ DCs, with the relevant allergen house dust mite (HDM) as a model to ascertain their role in asthma. We show that acute and chronic HDM exposure leads to defective Th1 immunity in Batf3-deficient mice. In addition, chronic HDM challenge in Batf3-/- mice results in increased Th2 and Th17 immune responses and exacerbated airway inflammation...
May 18, 2017: JCI Insight
https://www.readbyqxmd.com/read/28507585/ctgf-upregulation-correlates-with-mmp-9-level-in-airway-remodeling-in-a%C3%A2-murine-model-of-asthma
#4
Sheng-Chieh Lin, Hsiu-Chu Chou, Bor-Luen Chiang, Chung-Ming Chen
INTRODUCTION: Connective tissue growth factor (CTGF) mediates hypertrophy, proliferation, and extracellular matrix synthesis. Matrix metalloproteinase (MMP) plays a role in airway extracellular matrix remodeling. The correlation between CTGF and MMP in airway remodeling of asthma was unknown. This study investigated lung CTGF expression and its correlation with MMP and airway structural changes in a murine model of asthma. MATERIAL AND METHODS: Female BALB/c mice were sensitized and challenged by intraperitoneal injections and intranasal phosphate-buffered saline (PBS) or ovalbumin (OVA)...
April 1, 2017: Archives of Medical Science: AMS
https://www.readbyqxmd.com/read/28500314/activation-of-eosinophils-interacting-with-bronchial-epithelial-cells-by-antimicrobial-peptide-ll-37-implications-in-allergic-asthma
#5
Delong Jiao, Chun-Kwok Wong, Miranda Sin-Man Tsang, Ida Miu-Ting Chu, Dehua Liu, Jing Zhu, Man Chu, Christopher Wai-Kei Lam
The role of antimicrobial peptide LL-37 in asthma exacerbation is unclear. Microbial infection, which is the most common inducer of asthma exacerbation, is accompanied by elevated LL-37. The present study found that co-culture of eosinophils and bronchial epithelial cell line BEAS-2B significantly enhanced intercellular adhesion molecule-1 on both cells and CD18 expression on eosinophils upon LL-37 stimulation. IL-6, CXCL8 and CCL4 were substantially released in co-culture in the presence of LL-37. LL-37 triggered the activation of eosinophils interacting with BEAS-2B cells in a P2X purinoceptor 7/epidermal growth factor receptor-dependent manner...
May 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28497614/broad-th2-neutralization-and-anti-inflammatory-action-of-pentosan-polysulfate-sodium-in-experimental-allergic-rhinitis
#6
Caroline Sanden, Michiko Mori, Prajakta Jogdand, Jimmie Jönsson, Ravi Krishnan, Xiangdong Wang, Jonas S Erjefält
BACKGROUND: Th2 cytokines like interleukin-4, -5, and -13 are regarded as important drivers of the immunopathology underlying allergic rhinitis (AR) and asthma. The present study explores the capacity of pentosan polysulfate sodium (PPS), a semi-synthetic heparin-like macromolecular carbohydrate, to bind Th2 cytokines and exert biological neutralization in vitro, as well as anti-inflammatory actions in vivo. METHODOLOGY: The capacity of PPS to bind recombinant Th2 cytokines was tested with surface plasmon resonance (SPR) technology and biological Th2 neutralization was assessed by Th2-dependent proliferation assays...
May 12, 2017: Immunity, Inflammation and Disease
https://www.readbyqxmd.com/read/28494800/somatic-extracts-of-marshallagia-marshalli-downregulate-the-th2-associated-immune-responses-in-ovalbumin-induced-airway-inflammation-in-balb-c-mice
#7
Sima Parande Shirvan, Azadeh Ebrahimby, Arezoo Dousty, Mohsen Maleki, Ahmadreza Movassaghi, Hassan Borji, Alireza Haghparast
BACKGROUND: Recently the role of gastrointestinal nematodes in modulating the immune responses in inflammatory and immune-mediated conditions such as allergy and autoimmune diseases has been introduced. This is mainly due to the suppressive effects of somatic and excretory secretory (ES) products of nematodes on the immune responses. In this study, we evaluated the immunomodulatory potentials of somatic products of Marshallagia marshalli, a gastrointestinal nematodes of sheep, to suppress the immune-mediated responses in a murine model of allergic airway inflammation...
May 12, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28483562/the-role-of-inkt-cells-on-the-phenotypes-of-allergic-airways-in-a-mouse-model
#8
Lennart K A Lundblad, Nazey Gülec, Matthew E Poynter, Victoria L DeVault, Oliver Dienz, Jonathan E Boyson, Nirav Daphtary, Minara Aliyeva, Jennifer L Ather, Felix Scheuplein, Robert Schaub
iNKT cells and mast cells have both been implicated in the syndrome of allergic asthma through their activation-induced release of Th2 type cytokines and secretion of histamine and other mediators, respectively, which can promote airways hyperresponsiveness (AHR) to agents such as methacholine. However, a mechanistic link between iNKT cells and mast cell recruitment or activation has never been explored. Our objective was to determine whether iNKT cells are necessary for the recruitment of mast cells and if iNKT cells can influence the acute allergen induced bronchoconstriction (AIB) caused by mast cell mediator release...
May 5, 2017: Pulmonary Pharmacology & Therapeutics
https://www.readbyqxmd.com/read/28481622/cardiomyocytes-of-the-heart-and-pulmonary-veins-novel-contributors-to-asthma
#9
Stephen Sai Folmsbee, Cara J Gottardi
Recent genome-wide association studies have implicated both cardiac and pulmonary vein-related genes in the pathogenesis of asthma. Since cardiac cells are not present in lung airways or viewed to affect the immune system, interpretation of these findings in the context of more well-established contributors to asthma has remained challenging. However, cardiomyocytes are present in the lung, specifically along pulmonary veins, and recent murine models suggest that cardiac cells lining pulmonary veins may contribute to allergic airway disease...
May 8, 2017: American Journal of Respiratory Cell and Molecular Biology
https://www.readbyqxmd.com/read/28475040/model-based-estimation-of-respiratory-parameters-from-capnography-with-application-to-diagnosing-obstructive-lung-disease
#10
Abubakar Abid, Rebecca J Mieloszyk, George C Verghese, Baruch S Krauss, Thomas Heldt
OBJECTIVE: We use a single-alveolar-compartment model to describe the partial pressure of carbon dioxide in exhaled breath, as recorded in time-based capnography. Respiratory parameters are estimated using this model and then related to the clinical status of patients with obstructive lung disease. METHODS: Given appropriate assumptions, we derive an analytical solution of the model, describing the exhalation segment of the capnogram. This solution is parametrized by alveolar CO2 concentration, dead-space fraction, and the time constant associated with exhalation...
May 2, 2017: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/28474108/the-immunotherapeutic-role-of-bacterial-lysates-in-a-mouse-model-of-asthma
#11
Chentao Liu, Rong Huang, Rujie Yao, Aimei Yang
INTRODUCTION: Asthma is the most common chronic lower respiratory disease in childhood throughout the world. Recurrent respiratory tract infections in young children, especially viral infections, are the major cause of acute asthmatic exacerbations and contribute to development of asthma. Bacterial extracts have been used to improve the immune defenses of the respiratory tract. However, seldom studies have examined the effect of bacterial lysates on childhood asthma. In this study, we examined whether bacterial lysates (OM-85) will improve symptoms of asthmatic mice via modulation of the immune response...
May 4, 2017: Lung
https://www.readbyqxmd.com/read/28472780/effects-of-microrna-19b-on-airway-remodeling-airway-inflammation-and-degree-of-oxidative-stress-by-targeting-tslp-through-the-stat3-signaling-pathway-in-a-mouse-model-of-asthma
#12
Ling Ye, Yan Mou, Jian Wang, Mei-Ling Jin
This study explored the effects of microRNA-19b (miR-19b) on airway remodeling, airway inflammation, and degree of oxidative stress in a mouse model of asthma. Bioinformatics analyses and dual luciferase reporter gene assays revealed that thymic stromal lymphopoietin (TSLP) is a direct target of miR-19b. An asthma model was established via ovalbumin (OVA) sensitization and challenge in 72 female BALB/c mice. Mice were then assigned to saline, OVA-sensitized, saline+miR-19b mimics, saline+anti-TSLP, OVA-sensitized+miR-19b mimics, OVA-sensitized+mimics scramble, OVA-sensitized+anti-TSLP, and OVA-sensitized+IgG2a groups...
April 20, 2017: Oncotarget
https://www.readbyqxmd.com/read/28471517/the-duffy-antigen-receptor-for-chemokines-darc-regulates-asthma-pathophysiology
#13
David G Chapman, Edward B Mougey, Jos L Van der Velden, Karolyn G Lahue, Minara Aliyeva, Nirav Daphtary, Katherine L George, Sidra M Hoffman, Robert W Schneider, Russell P Tracy, George S Worthen, Matthew E Poynter, Stephen P Peters, John J Lima, Yvonne Mw Janssen-Heininger, Charles G Irvin
BACKGROUND: The Duffy Antigen Receptor for Chemokines (DARC) is an atypical receptor that regulates pro-inflammatory cytokines. However, the role of DARC in asthma pathophysiology is unknown. OBJECTIVE: To determine the role of DARC in allergic airways disease in mice, and the association between DARC single nucleotide polymorphisms (SNPs) and clinical outcomes in patients with asthma. METHODS: Mice with targeted disruption of the Darc gene (Darc(∆E2) ) or WT mice were challenged over three weeks with house dust mite (HDM) antigen...
May 4, 2017: Clinical and Experimental Allergy: Journal of the British Society for Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28458281/role-of-histamine-releasing-factor-in-allergic-inflammatory-reactions
#14
Jun-Ichi Kashiwakura, Tomoaki Ando, Toshiaki Kawakami
 Mast cells are effector cells in immunoglobulin E (IgE)-mediated immediate hypersensitivity and allergic diseases such as asthma and food allergy. Mast cells are activated by the aggregation of the IgE-bound high-affinity IgE receptor FcεRI with multivalent antigen. Activated mast cells secrete proinflammatory mediators such as histamine, serotonin, and proteases and produce cytokines and chemokines. However, it has been reported that mast cells are activated by crosslinking of FcεRI with monomeric IgE in the absence of antigen...
2017: Yakugaku Zasshi: Journal of the Pharmaceutical Society of Japan
https://www.readbyqxmd.com/read/28454585/modulatory-role-of-regulatory-t-cells-in-a-murine-model-of-severe-equine-asthma
#15
Claudio Henríquez, Gabriel Morán, Cristian Carrasco, José Sarmiento, Miguel Barría, Hugo Folch, Benjamin Uberti
BACKGROUND: It is accepted that T regulatory cells (Treg) control different types of immune responses. In connection with this role, we have recently described an important increase in CD4+, CD25(high), Foxp3+ lymphocytes in the airway system of horses coursing with an exacerbation of severe equine asthma (EA). To explore the potential role of this population in the resolution of EA inflammation, we used a murine experimental model in which airway neutrophilic inflammation, which is similar to that observed in EA, is induced in mice by continual exposure to Aspergillus fumigatus contaminated hay...
April 28, 2017: BMC Veterinary Research
https://www.readbyqxmd.com/read/28453608/time-dependent-associations-between-body-composition-physical-activity-and-current-asthma-in-women-using-marginal-structural-models
#16
Annabelle Bédard, Ignasi Serra, Orianne Dumas, Xavier Basagaña, Françoise Clavel-Chapelon, Nicole Le Moual, Margaux Sanchez, Valérie Siroux, Raphaëlle Varraso, Judith Garcia-Aymerich
The role of obesity in asthma is well-known in adults, and has been partly attributed to a confounding role of physical inactivity. However, the interrelations between obesity, physical activity and asthma have been incompletely addressed, likely because their time-dependent and bidirectional nature represent a methodologically challenging research question. We aimed to estimate the independent causal effects of body mass index (BMI) and physical activity on current asthma using marginal structural models (MSMs)...
April 27, 2017: American Journal of Epidemiology
https://www.readbyqxmd.com/read/28441064/bacillus-calmette-guerin-alleviates-airway-inflammation-and-remodeling-by-preventing-tgf-%C3%AE-1-induced-epithelial-mesenchymal-transition
#17
Xinrui Tian, Xinli Tian, Rujie Huo, Qin Chang, Guoping Zheng, Yan Du, Yan Chen, Bo Niu
Bacillus Calmette-Guerin (BCG) is a potent agent for the prevention of tuberculosis. Current studies have regarded BCG as an immunomodulator. However, there is little information on whether it can be used to inhibit airway inflammation and airway remodeling caused by asthma. Therefore, in this study, we investigate the role of epithelial-mesenchymal transition (EMT) in airway inflammation and airway remodeling as well as the possible therapeutic mechanism of BCG for the treatment of asthma. Wistar rats were sensitized and challenged by ovalbumin for 2 weeks or 8 weeks...
April 25, 2017: Human Vaccines & Immunotherapeutics
https://www.readbyqxmd.com/read/28440659/alleviation-of-multiple-asthmatic-pathologic-features-with-orally-available-and-subtype-selective-gabaa-receptor-modulators
#18
Gloria S Forkuo, Amanda N Nieman, Nina Y Yuan, Revathi Kodali, Olivia B Yu, Nicolas M Zahn, Rajwana Jahan, Guanguan Li, Michael Rajesh Stephen, Margaret L Guthrie, Michael M Poe, Benjamin D Hartzler, Ted W Harris, Gene T Yocum, Charles W Emala, Douglas A Steeber, Douglas C Stafford, James M Cook, Leggy A Arnold
We describe pharmacokinetic and pharmacodynamic properties of two novel oral drug candidates for asthma. Phenolic α4β3γ2 GABAAR selective compound 1 and acidic α5β3γ2 selective GABAAR positive allosteric modulator compound 2 relaxed airway smooth muscle ex vivo and attenuated airway hyperresponsiveness (AHR) in a murine model of asthma. Importantly, compound 2 relaxed acetylcholine contracted human tracheal airway smooth muscle strips. Oral treatment of compounds 1 and 2 decreased eosinophils in bronchoalveolar lavage fluid in ovalbumin sensitized and challenged mice, thus exhibiting anti-inflammatory properties...
May 1, 2017: Molecular Pharmaceutics
https://www.readbyqxmd.com/read/28439933/effect-of-anti-ige-in-occupational-asthma-caused-by-exposure-to-low-molecular-weight-agents
#19
M Ollé-Monge, M J Cruz, S Gomez-Ollés, I Ojanguren, J Vanoirbeek, X Muñoz
BACKGROUND: The role of immunoglobulin (Ig)-E in occupational asthma (OA) due to low molecular weight (LMW) agents is not well established compared to classical atopic asthma. In the present study we evaluate whether anti-IgE monoclonal antibody (mAb) has an effect in a mouse model of OA, using persulfate salts. METHODS: On days 1 and 8, BALB/C mice were dermally sensitized with 5% ammonium persulfate (AP) or dimethyl sulfoxide (DMSO). On days 15, 18 and 21 animals were injected intraperitoneally with anti-IgE mAb or PBS 6 hours before challenge with AP or saline...
April 25, 2017: Allergy
https://www.readbyqxmd.com/read/28425576/bone-marrow-adipose-and-lung-tissue-derived-murine-mesenchymal-stromal-cells-release-different-mediators-and-differentially-affect-airway-and-lung-parenchyma-in-experimental-asthma
#20
Soraia C Abreu, Mariana A Antunes, Debora G Xisto, Fernanda F Cruz, Vivian C Branco, Elga Bandeira, Jamil Zola Kitoko, Almair F de Araújo, Ludmilla Dellatorre-Texeira, Priscilla C Olsen, Daniel J Weiss, Bruno L Diaz, Marcelo M Morales, Patricia R M Rocco
Mesenchymal stromal cells (MSCs) from different sources have differential effects on lung injury. To compare the effects of murine MSCs from bone marrow (BM), adipose tissue (AD), and lung tissue (LUNG) on inflammatory and remodeling processes in experimental allergic asthma, female C57BL/6 mice were sensitized and challenged with ovalbumin (OVA) or saline (C). Twenty-four hours after the last challenge, mice received either saline (50 µl, SAL), BM-MSCs, AD-MSCs, or LUNG-MSCs (10(5) cells per mouse in 50 µl total volume) intratracheally...
June 2017: Stem Cells Translational Medicine
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