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Asthma challenge model

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https://www.readbyqxmd.com/read/29772010/hypergravity-enhances-the-therapeutic-effect-of-dexamethasone-in-allergic-asthma-and-rhinitis-animal-model
#1
Tae Young Jang, Ah-Yeoun Jung, Soonjo Kwon, Young Hyo Kim
We investigated whether the therapeutic effects of dexamethasone for allergic asthma and rhinitis were enhanced in mice when exposed to hypergravity. Forty mice were divided into 5 groups (n = 8/group): Control group received saline intraperitoneally (i.p.) and intranasally (i.n.); Asthma group received i.p./i.n. ovalbumin (OVA) for inducing allergic asthma/rhinitis; Dexa group received i.n. dexamethasone (0.75 mg/kg) 30 minutes before each OVA challenge; Hypergravity group was subjected to allergic asthma/rhinitis as well as exposed to 5 G hypergravity for 30 days; Finally in Dexa/Hypergravity group, hypergravity and dexamethasone were used simultaneously during induction of allergic asthma/rhinitis...
2018: PloS One
https://www.readbyqxmd.com/read/29763661/prominent-release-of-lipoxygenase-generated-mediators-in-a-murine-house-dust-mite-induced-asthma-model
#2
Johan Kolmert, Sergio Piñeiro-Hermida, Craig E Wheelock, Mats Hamberg, Joshua A Gregory, Icíar P López, Alexander Fauland, Sven-Erik Dahlén, José G Pichel, Mikael Adner
The profile of activation of lipid mediator (LM) pathways in asthmatic airway inflammation remains unclear. This experimental study quantified metabolite levels of ω3-, ω6- and ω9-derived polyunsaturated fatty acids in bronchoalveolar lavage fluid (BALF) after 4-weeks of repeated house dust mite (HDM) exposure in a murine (C57BL/6) asthma model. The challenge induced airway hyperresponsiveness, pulmonary eosinophil infiltration, but with low and unchanged mast cell numbers. Of the 112 screened LMs, 26 were increased between 2 to >25-fold in BALF with HDM treatment (p < 0...
May 12, 2018: Prostaglandins & Other Lipid Mediators
https://www.readbyqxmd.com/read/29752757/subcutaneous-immunotherapy-suppresses-th2-inflammation-and-induces-neutralizing-antibodies-but-sublingual-immunotherapy-suppresses-airway-hyperresponsiveness-in-grass-pollen-mouse-models-for-allergic-asthma
#3
Laura Hesse, Uilke Brouwer, Arjen H Petersen, Renée Gras, Lisette Bosman, Jens Brimnes, Joanne N G Oude Elberink, Antoon J M van Oosterhout, Martijn C Nawijn
BACKGROUND: Both subcutaneous and sublingual allergen immunotherapy (SCIT and SLIT) have been shown to effectively suppress allergic manifestations upon allergen exposure, providing long term relief from symptoms in allergic disorders including allergic asthma. Clinical studies directly comparing SCIT and SLIT report a different kinetics and magnitude of immunological changes induced during treatment. Comparative studies into the mechanisms underlying immune suppression in SCIT and SLIT are lacking...
May 12, 2018: Clinical and Experimental Allergy: Journal of the British Society for Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/29747318/-effects-of-glycyrrhizic-acid-on-erk1-2-and-p38-mapk-signaling-pathway-in-a-murine-model-of-asthma
#4
W Y Zhang, Y C Gu, Y Tang, Q Z Wu
Objective: To explore the effects of glycyrrhizic acid (GA) on Extracellular regulated protein kinases (ERK1/2) and p38 mitogen-activated protein kinases (p38 MAPK) signaling pathways in a murine model of asthma. Methods: Sixty female BALB/c mice were randomly divided into 6 groups ( n =10 each): a control group, an asthmatic group, two treatment groups with low and high doses of GA, U0126 group and SB203580 group. Within 24 hours after the last OVA challenge, histological studies of lung were conducted with the hematoxylin and eosin staining (HE) and alcian blue-periodic acid-Schiff (AB-PAS), the relative protein expression of ERK1/2 and p38 MAPK were detected by immunohistochemistry and Western blotting in vivo ...
April 24, 2018: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/29739684/ameliorating-effects-of-nigella-sativa-oil-on-aggravation-of-inflammation-oxidative-stress-and-cytotoxicity-induced-by-smokeless-tobacco-extract-in-an-allergic-asthma-model-in-wistar-rats
#5
T Khaldi, N Chekchaki, M Boumendjel, F Taibi, M Abdellaoui, M Messarah, A Boumendjel
BACKGROUND: The comparison of smokeless tobacco (ST) exposure versus Ovalbumin (Ova) sensitized rats or asthmatic patients has hardly been studied in the literature. Thus, the present study aims to investigate the aggravation of inflammation, exacerbation of asthma, oxidative stress and cytotoxicity induced by ST. METHODS: ST was given at the dose of 40mg/kg in an allergic asthma model in Wistar rats. Furthermore, the effects of oral administration of Nigella sativa oil (NSO), at a dose of 4mL/kg/day, were investigated...
May 5, 2018: Allergologia et Immunopathologia
https://www.readbyqxmd.com/read/29729496/progressive-increase-in-allergen-concentration-abrogates-immune-tolerance-in-ovalbumin-induced-murine-model-of-chronic-asthma
#6
Gurupreet S Sethi, Amarjit S Naura
Persistent inflammation and remodeling of airways are the major hallmarks of asthma. Though airway inflammation diminishes in ovalbumin (OVA)-based mouse model of chronic asthma owing to immune-tolerance linked with repeated allergen exposure, which limits the application of the disease model. Accordingly, the present study was designed to develop a murine model of chronic asthma which presents persistent airway inflammation coupled with remodeling traits. Herein, OVA-sensitized BALB/c mice were challenged with increasing (modified protocol) or constant concentration (conventional protocol) of the allergen for 6 weeks; 3 times/week...
May 2, 2018: International Immunopharmacology
https://www.readbyqxmd.com/read/29702092/il-21-alleviates-allergic-asthma-in-dock8-knockout-mice
#7
Jiabin Wu, Suqian Zhang, Tao Qin, Jinqiu Jiang, Qiao Liu, Liang Zhang, Xiaodong Zhao, Jihong Dai
Patients with DOCK8 deficiency are at increased susceptibility to develop allergic diseases such as food allergy and asthma. Here, we aimed to analyze the pathogenesis of asthma in DOCK8-deficient patients. In our mouse model, DOCK8-knockout (KO) mice sensitized with low-dose OVA were challenged with 1.5% OVA to induce allergic asthma. As compared to that in WT mice, remarkable airway hyperresponsiveness was observed in KO mice. Increased inflammatory cells and eosinophils infiltrated in airway lumen in KO mice especially around bronchi...
April 24, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29700102/-in-vitro-in-silico-and-in-vivo-study-challenges-the-impact-of-bronchial-thermoplasty-on-acute-airway-smooth-muscle-mass-loss
#8
Igor L Chernyavsky, Richard J Russell, Ruth M Saunders, Gavin E Morris, Rachid Berair, Amisha Singapuri, Latifa Chachi, Adel H Mansur, Peter H Howarth, Paddy Dennison, Rekha Chaudhuri, Stephen Bicknell, Felicity R A J Rose, Salman Siddiqui, Bindi S Brook, Christopher E Brightling
Bronchial thermoplasty is a treatment for asthma. Whether during thermoplasty the airway wall fraction exposed to temperatures necessary to affect cells is sufficient to explain its histopathological impact is unclear.Airway smooth muscle and bronchial epithelial cells were exposed to media (37-70°C) for 10 seconds to mimic thermoplasty. In silico we developed a mathematical model of airway heat distribution following thermoplasty. In vivo we determined airway smooth muscle mass and epithelial integrity pre- and post-thermoplasty in 14 severe asthmatics...
April 26, 2018: European Respiratory Journal: Official Journal of the European Society for Clinical Respiratory Physiology
https://www.readbyqxmd.com/read/29694974/il-33-and-its-receptor-st2-after-inhaled-allergen-challenge-in-allergic-asthmatics
#9
Patrick D Mitchell, Brittany M Salter, John Paul Oliveria, Amani El-Gammal, Damian Tworek, Steve G Smith, Roma Sehmi, Gail M Gauvreau, Paul M O Apos Byrne
BACKGROUND: Previous murine models have demonstrated interleukin (IL)-33 to be an important mediator of type-2 inflammation and to promote airway hyperresponsiveness in allergic asthma. A number of inflammatory cells produce IL-33 and eosinophils express ST2 mRNA. The relationship between IL-33 and eosinophils in allergic asthma, however, remains unclear. OBJECTIVE: The aim of this work was to evaluate in vitro the effect of allergen inhalation on IL-33 levels and expression of its receptor (ST2L) on eosinophils in allergic asthmatics, and the effect of IL-33 stimulation on eosinophil activity...
April 25, 2018: International Archives of Allergy and Immunology
https://www.readbyqxmd.com/read/29688023/passive-nocturnal-physiologic-monitoring-enables-early-detection-of-exacerbations-in-asthmatic-children-a-proof-of-concept-study
#10
Michelle F Huffaker, Michael Carchia, Bronwyn U Harris, William C Kethman, Todd E Murphy, Charlotte C D Sakarovitch, FeiFei Qin, David N Cornfield
RATIONALE: Asthma management depends on prompt identification of symptoms, which challenges both patients and providers. In asthma, a misapprehension of health between exacerbations can compromise compliance. Thus, there is a need for a tool that permits objective longitudinal monitoring without increasing the burden of patient compliance. OBJECTIVES: We sought to determine whether changes in nocturnal physiology are associated with asthma symptoms in pediatric patients...
April 24, 2018: American Journal of Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/29683527/modulation-of-allergic-responses-by-mitochondrial-stat3-inhibitors
#11
Tal Erlich, Israa Sharkia, Nadine Landolina, Miri Assayag, Omer Goldberger, Neville Berkman, Francesca Levi-Schafer, Ehud Razin
Recently we have shown that mast cell mitochondrial STAT3 could serve as a new target for the regulation of the allergic response as it plays an essential role in immunologically-mediated degranulation of mast cells. In the present work, we explored how two recently developed mitochondrial STAT3 inhibitors (Mitocur-1 and Mitocur-3) modulate the allergic response. Here we show that treatment of rodent and human cultured mast cells with low concentrations of mitochondrial STAT3 inhibitors had no effect on STAT3 target gene expression...
April 23, 2018: Allergy
https://www.readbyqxmd.com/read/29680839/decreased-migration-of-dendritic-cells-into-the-jugular-nodose-ganglia-by-the-cxcl12-neutraligand-chalcone-4-in-ovalbumin-sensitized-asthmatic-mice
#12
Sebastian Heck, François Daubeuf, Duc Dung Le, Martina Sester, Dominique Bonnet, Robert Bals, Nelly Frossard, Quoc Thai Dinh
OBJECTIVE: The chemokine CXCL12 interacting with the CXC receptor 4 (CXCR4) has been reported to play a role in the development and progression of bronchial asthma, but its mechanism of action is still unknown. The objective of this study was to assess the effect of the CXCL12 neutraligand chalcone 4 on the migration of dendritic cells (DCs) in a murine model of allergic airway inflammation. METHODS: A 21-day ovalbumin (OVA)-induced allergic-airway TH2 inflammation model in BALB/c mice was used...
April 20, 2018: Neuroimmunomodulation
https://www.readbyqxmd.com/read/29678746/thirdhand-smoke-component-can-exacerbate-a-mouse-asthma-model-via-mast-cells
#13
Mang Yu, Kaori Mukai, Mindy Tsai, Stephen J Galli
BACKGROUND: Thirdhand smoke (THS) represents the accumulation of secondhand smoke on indoor surfaces and in dust, which, over time, can become more toxic than secondhand smoke. Although it is well known that children of smokers are at increased risk for developing asthma and for exacerbation of that disease if they already have it, how exposure to THS may influence the development or exacerbation of asthma remains unknown. OBJECTIVE: We investigated whether epicutaneous exposure to an important component of THS, 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone (NNK), can influence asthma pathology in a model elicited in mice by repeated intranasal challenge with cockroach antigen (CRA)...
April 17, 2018: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/29676619/cysteinyl-leukotriene-receptor-1-and-health-effects-of-particulate-exposure-in-asthma
#14
Nathan Rabinovitch, Meaghan J Jones, Anna Faino, Matthew Strand, Alexander M Morin, Julia MacIsaac, Paul R Reynolds, Amrit Singh, Michael S Kobor, Erwin W Gelfand, Christopher Carlsten
RATIONALE: Acute exposure to ambient particle matter is associated with increased levels of the cysteinyl leukotriene (CysLT) biomarker, urinary leukotriene E4 (uLTE4 ), in subjects with asthma. OBJECTIVES: The role of CysLTs in mediating asthma worsening after particulate matter exposures was explored. METHODS: Daily concentrations of particulate matter of 2.5 μm and smaller diameter (PM2.5 ) and repeated measurements of albuterol use over a 5-month period were collected in 44 urban school children with persistent asthma...
April 2018: Annals of the American Thoracic Society
https://www.readbyqxmd.com/read/29676068/trpv1-blocking-alleviates-airway-inflammation-and-remodeling-in-a-chronic-asthma-murine-model
#15
Joon Young Choi, Hwa Young Lee, Jung Hur, Kyung Hoon Kim, Ji Young Kang, Chin Kook Rhee, Sook Young Lee
PURPOSE: Asthma is a chronic inflammatory airway disease characterized by airway hyperresponsiveness (AHR), inflammation, and remodeling. There is emerging interest in the involvement of the transient receptor potential vanilloid 1 (TRPV1) channel in the pathophysiology of asthma. This study examined whether TRPV1 antagonism alleviates asthma features in a murine model of chronic asthma. METHODS: BALB/c mice were sensitized to and challenged by ovalbumin to develop chronic asthma...
May 2018: Allergy, Asthma & Immunology Research
https://www.readbyqxmd.com/read/29669661/epidemiology-of-childhood-asthma-in-mainland-china-1988-2014-a-meta-analysis
#16
Xiaojing Guo, Zhuoying Li, Weijun Ling, Jianxiong Long, Cuilin Su, Jinglin Li, Siqiao Liang, Li Su
BACKGROUND: After the promotion of the two-child policy in recent years, the population of children in mainland China was bound to have a rapid growth, which would bring great challenges to public health. A number of cross-sectional studies on the epidemic of childhood asthma in mainland China were recently conducted, and varied prevalences were reported. Thus, knowing the epidemiology of childhood asthma in mainland China is of great necessity. OBJECTIVE: Our study aimed to summarize the pooled prevalence of childhood asthma in mainland China and its time trend, gender difference, regional distribution, and age structure...
May 1, 2018: Allergy and Asthma Proceedings:
https://www.readbyqxmd.com/read/29665658/effect-of-the-anti-il-17-antibody-on-allergic-inflammation-in-an-obesity-related-asthma-model
#17
Lin Liang, Jung Hur, Ji Young Kang, Chin Kook Rhee, Young Kyoon Kim, Sook Young Lee
Background/Aims: The co-occurrence of obesity aggravates asthma symptoms. Diet-induced obesity increases helper T cell (TH) 17 cell differentiation in adipose tissue and the spleen. The 3-hydroxy-3-methylglutaryl-coenzyme A reductase inhibitor pravastatin can potentially be used to treat asthma in obese patients by inhibiting interleukin 17 (IL-17) expression. This study investigated the combined effects of pravastatin and anti-IL-17 antibody treatment on allergic inflammation in a mouse model of obesity-related asthma...
April 19, 2018: Korean Journal of Internal Medicine
https://www.readbyqxmd.com/read/29651336/pi3k-p38-and-jak-stat-signalling-in-bronchial-tissue-from-patients-with-asthma-following-allergen-challenge
#18
Thomas Southworth, Sarah Mason, Alan Bell, Isabel Ramis, Marta Calbet, Anna Domenech, Neus Prats, Montserrat Miralpeix, Dave Singh
Background: Inhaled allergen challenges are often used to evaluate novel asthma treatments in early phase clinical trials. Current novel therapeutic targets in asthma include phosphoinositide 3-kinases (PI3K) delta and gamma, p38 mitogen-activated protein kinase (p38) and Janus kinase/Signal Transducer and Activator of Transcription (JAK/STAT) signalling pathways. The activation of these pathways following allergen exposure in atopic asthma patients it is not known. Methods: We collected bronchial biopsies from 11 atopic asthma patients at baseline and after allergen challenge to investigate biomarkers of PI3K, p38 MAPK and JAK/STAT activation by immunohistochemistry...
2018: Biomarker Research
https://www.readbyqxmd.com/read/29649507/effects-of-anthraquinones-from-cassia-occidentalis-l-on-ovalbumin-induced-airways-inflammation-in-a-mouse-model-of-allergic-asthma
#19
Wenhao Xu, Meiqun Hu, Qihong Zhang, Jingbo Yu, Weike Su
ETHNOPHARMACOLOGICAL RELEVANCE: Cassia occidentalis Linn. is a traditional ayruvedic edible shrub containing anthraquinones (AQs) as the principle active constituents. In folk medicine, it has a variety of uses including treatment of whooping cough ('pertussis') and inflammatory diseases. Despite these applications, limited data are available to validate the effects of C. occidentalis AQs on airways inflammation in asthma. AIM OF THE STUDY: To explore the anti-inflammatory potential of AQs extracted from C...
April 9, 2018: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/29649224/seasonal-asthma-in-melbourne-australia-and-some-observations-on-the-occurrence-of-thunderstorm-asthma-and-its-predictability
#20
Jeremy D Silver, Michael F Sutherland, Fay H Johnston, Edwin R Lampugnani, Michael A McCarthy, Stephanie J Jacobs, Alexandre B Pezza, Edward J Newbigin
We examine the seasonality of asthma-related hospital admissions in Melbourne, Australia, in particular the contribution and predictability of episodic thunderstorm asthma. Using a time-series ecological approach based on asthma admissions to Melbourne metropolitan hospitals, we identified seasonal peaks in asthma admissions that were centred in late February, June and mid-November. These peaks were most likely due to the return to school, winter viral infections and seasonal allergies, respectively. We performed non-linear statistical regression to predict daily admission rates as functions of the seasonal cycle, weather conditions, reported thunderstorms, pollen counts and air quality...
2018: PloS One
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