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https://www.readbyqxmd.com/read/29777594/il-3-producing-basophils-are-required-to-exacerbate-airway-hyper-responsiveness-in-a-murine-inflammatory-model
#1
Rachel Rignault-Bricard, François Machavoine, Salah Mecheri, Olivier Hermine, Elke Schneider, Michel Dy, Maria Leite-de-Moraes
BACKGROUND: Basophils are commonly associated with allergic responses because of their ability to produce large amounts of pro-Th2 cytokines and histamine. However, the mechanisms through which bone marrow-resident basophils (BMRB) become fully competent cytokine and histamine producers in response to IgE crosslinking are poorly understood. Here, we sought to determine the role of IL-3 in promoting pro-Th2 basophils. METHODS: BMRB and basophils exposed to IL-3 in vitro and in vivo were evaluated for their production of Th2 cytokines and histamine in response to FcεRI crosslinking on both protein and gene expression levels...
May 19, 2018: Allergy
https://www.readbyqxmd.com/read/29760450/caveolin-3-differentially-orchestrates-cholinergic-and-serotonergic-constriction-of-murine-airways
#2
M Keshavarz, M Skill, M I Hollenhorst, S Maxeiner, M Walecki, U Pfeil, W Kummer, G Krasteva-Christ
The mechanisms of controlling airway smooth muscle (ASM) tone are of utmost clinical importance as inappropriate constriction is a hallmark in asthma and chronic obstructive pulmonary disease. Receptors for acetylcholine and serotonin, two relevant mediators in this context, appear to be incorporated in specialized, cholesterol-rich domains of the plasma membrane, termed caveolae due to their invaginated shape. The structural protein caveolin-1 partly accounts for anchoring of these receptors. We here determined the role of the other major caveolar protein, caveolin-3 (cav-3), in orchestrating cholinergic and serotonergic ASM responses, utilizing newly generated cav-3 deficient mice...
May 14, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29739682/multispecies-probiotics-combination-prevents-ovalbumin-induced-airway-hyperreactivity-in-mice
#3
Jui-Cheng Chen, Cheng-Chih Tsai, Chang-Chi Hsieh, Alice Lan, Chun-Chih Huang, Sew-Fen Leu
BACKGROUND: Probiotics could be beneficial to health and some of them have shown to modulate immune responses. AIM: The aim of this study is to investigate if the probiotic strains including Lactobacillus and Pediococcus strains are able to alleviate allergic reactions in an ovalbumin-induced airway allergy model. METHODS: Lactobacillus multi-species preparation (LMP) was gavaged to BALB/c for total six weeks and BALB/c was challenged with ovalbumin in the last two weeks...
May 5, 2018: Allergologia et Immunopathologia
https://www.readbyqxmd.com/read/29703864/farnesyltransferase-inhibition-exacerbates-eosinophilic-inflammation-and-airway-hyperreactivity-in-mice-with-experimental-asthma-the-complex-roles-of-ras-gtpase-and-farnesylpyrophosphate-in-type-2-allergic-inflammation
#4
Jennifer M Bratt, Kevin Y Chang, Michelle Rabowsky, Lisa M Franzi, Sean P Ott, Simone Filosto, Tzipora Goldkorn, Muhammad Arif, Jerold A Last, Nicholas J Kenyon, Amir A Zeki
Ras, a small GTPase protein, is thought to mediate Th2-dependent eosinophilic inflammation in asthma. Ras requires cell membrane association for its biological activity, and this requires the posttranslational modification of Ras with an isoprenyl group by farnesyltransferase (FTase) or geranylgeranyltransferase (GGTase). We hypothesized that inhibition of FTase using FTase inhibitor (FTI)-277 would attenuate allergic asthma by depleting membrane-associated Ras. We used the OVA mouse model of allergic inflammation and human airway epithelial (HBE1) cells to determine the role of FTase in inflammatory cell recruitment...
April 27, 2018: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/29678746/thirdhand-smoke-component-can-exacerbate-a-mouse-asthma-model-via-mast-cells
#5
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/29678672/genetic-restriction-of-antigen-presentation-dictates-allergic-sensitization-and-disease-in-humanized-mice
#6
Alina Neunkirchner, Bernhard Kratzer, Cordula Köhler, Ursula Smole, Lukas F Mager, Klaus G Schmetterer, Doris Trapin, Victoria Leb-Reichl, Edward Rosloniec, Ronald Naumann, Lukas Kenner, Beatrice Jahn-Schmid, Barbara Bohle, Rudolf Valenta, Winfried F Pickl
BACKGROUND: Immunoglobulin(Ig)E-associated allergies result from misguided immune responses against innocuous antigens. CD4+ T lymphocytes are critical for initiating and perpetuating that process, yet the crucial factors determining whether an individual becomes sensitized towards a given allergen remain largely unknown. OBJECTIVE: To determine the key factors for sensitization and allergy towards a given allergen. METHODS: We here created a novel human T cell receptor(TCR) and human leucocyte antigen (HLA)-DR1 (TCR-DR1) transgenic mouse model of asthma, based on the human-relevant major mugwort (Artemisia vulgaris) pollen allergen Art v 1 to examine the critical factors for sensitization and allergy upon natural allergen exposure via the airways in the absence of systemic priming and adjuvants...
April 5, 2018: EBioMedicine
https://www.readbyqxmd.com/read/29600329/dietary-wheat-amylase-trypsin-inhibitors-exacerbate-murine-allergic-airway-inflammation
#7
Victor F Zevallos, Verena K Raker, Joachim Maxeiner, Petra Scholtes, Kerstin Steinbrink, Detlef Schuppan
BACKGROUND: Wheat amylase trypsin inhibitors (ATI) are dietary non-gluten proteins that activate the toll-like receptor 4 on myeloid cells, promoting intestinal inflammation. AIM OF THE STUDY: We investigated the effects of dietary ATI on experimental allergic airway inflammation. METHODS: Mice on a gluten and ATI-free diet (GAFD), sensitized with PBS or ovalbumin (OVA) and challenged with OVA, were compared to mice on a commercial standard chow, a gluten diet naturally containing ~ 0...
March 29, 2018: European Journal of Nutrition
https://www.readbyqxmd.com/read/29593031/central-role-of-the-nf%C3%AE%C2%BAb-pathway-in-the-scgb1a1-expressing-epithelium-in-mediating-respiratory-syncytial-virus-induced-airway-inflammation
#8
Bing Tian, Jun Yang, Yingxin Zhao, Teodora Ivanciuc, Hong Sun, Maki Wakamiya, Roberto P Garofalo, Allan R Brasier
Lower respiratory tract infection with respiratory syncytial virus (RSV) produces profound inflammation. Despite an understanding of the role of adaptive immunity in RSV infection, the identity of the major sentinel cells initially triggering inflammation is controversial. Here we evaluate the role of nonciliated secretoglobin ( Scgb1a1 )-expressing bronchiolar epithelial cells in RSV infection. Knock-in mice expressing a tamoxifen (TMX)-inducible Cre recombinase (CreERTM ) from the Scgb1a1 locus were crossed with mice that harbor a RelA conditional allele ( RelAfl ), with loxP sites flanking exons 5-8 of the Rel homology domain...
March 28, 2018: Journal of Virology
https://www.readbyqxmd.com/read/29574077/wheat-amylase-trypsin-inhibitors-exacerbate-intestinal-and-airway-allergic-immune-responses-in-humanized-mice
#9
Iris Bellinghausen, Benno Weigmann, Victor Zevallos, Joachim Maxeiner, Sonja Reißig, Ari Waisman, Detlef Schuppan, Joachim Saloga
BACKGROUND: Amylase-trypsin inhibitors (ATIs) in wheat and related cereals are potent activators of myeloid innate immune cells via engagement of TLR4. Furthermore, ATIs have been shown to serve as adjuvants in experimental intestinal inflammatory diseases. OBJECTIVE: The aim of this study was to analyze whether ATIs are also modifiers of allergic inflammation. METHODS: Therefore, CD4+ T cells from grass or birch pollen sensitized donors were stimulated with autologous allergen-pulsed dendritic cells in the presence or absence of ATIs or the control storage protein zein from corn...
March 21, 2018: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/29522851/the-parasitic-68-mer-peptide-fhhdm-1-inhibits-mixed-granulocytic-inflammation-and-airway-hyperreactivity
#10
Akane Tanaka, Venkata Sita Rama Raju Allam, Jennifer Simpson, Natalia Tiberti, Jenna Shiels, Joyce To, Maria Lund, Valery Combes, Sinead Weldon, Cliff Taggart, John P Dalton, Simon Phipps, Maria B Sukkar, Sheila Donnelly
No abstract text is available yet for this article.
March 6, 2018: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/29522844/regulation-of-type-2-innate-lymphoid-cell-dependent-airway-hyperreactivity-by-butyrate
#11
Christina Li-Ping Thio, Po-Yu Chi, Alan Chuan-Ying Lai, Ya-Jen Chang
BACKGROUND: Allergic asthma is characterized by airway hyperreactivity (AHR) and inflammation driven by aberrant TH 2 responses. Type 2 innate lymphoid cells (ILC2s) are a critical source of the TH 2 cytokines IL-5 and IL-13, which promote acute asthma exacerbation. Short-chain fatty acids (SCFAs) have been shown to attenuate T cell-mediated allergic airway inflammation. However, their role in regulation of ILC2-driven AHR and lung inflammation remains unknown. OBJECTIVE: We investigated the immunomodulatory role of SCFAs in regulation of ILC2-induced AHR and airway inflammation and delineated the mechanism involved...
March 6, 2018: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/29501247/the-impact-of-aging-on-outpatients-with-asthma-in-a-real-world-setting
#12
Giorgio Ciprandi, Irene Schiavetti, Fabio L M Ricciardolo
BACKGROUND: Asthma is characterized by airway inflammation and bronchial hyperreactivity. It is conceived that aging may affect asthma characteristics, but this issue is still not completely clarified in clinical practice. OBJECTIVE: The present study investigated whether aging may affect some clinical and functional factors in outpatients with asthma visited in a real-world setting, such as clinical practice. METHODS: Globally, 391 outpatients (163 males, median age 47 years) with asthma were consecutively evaluated...
March 2018: Respiratory Medicine
https://www.readbyqxmd.com/read/29380034/solitary-cholinergic-stimulation-induces-airway-hyperreactivity-and-transcription-of-distinct-pro-inflammatory-pathways
#13
Leah R Reznikov, David K Meyerholz, Shin-Ping Kuan, Maria V Guevara, Kalina R Atanasova, Mahmoud H Abou Alaiwa
Airway hyperreactivity is a hallmark feature of asthma and can be precipitated by airway insults, such as ozone exposure or viral infection. A proposed mechanism linking airway insults to airway hyperreactivity is augmented cholinergic transmission. In the current study, we tested the hypothesis that acute potentiation of cholinergic transmission is sufficient to induce airway hyperreactivity. We atomized the cholinergic agonist bethanechol to neonatal piglets and forty-eight hours later measured airway resistance...
April 2018: Lung
https://www.readbyqxmd.com/read/29379533/winter-ambient-training-conditions-are-associated-with-increased-bronchial-hyperreactivity-and-with-shifts-in-serum-innate-immunity-proteins-in-young-competitive-speed-skaters
#14
Marcin Kurowski, Janusz Jurczyk, Sylwia Moskwa, Marzanna Jarzębska, Hubert Krysztofiak, Marek L Kowalski
Introduction: Regular training modulates airway inflammation and modifies susceptibility to respiratory infections. The impact of exercise and ambient conditions on airway hyperreactivity and innate immunity has not been well studied. We aimed to assess exercise-related symptoms, lung function, airway hyperresponsiveness and innate immunity proteins in relation to meteorological conditions and exercise load in competitive athletes. Material and methods: Thirty-six speed skaters were assessed during winter (WTP) and summer (STP) periods...
January 2018: Archives of Medical Science: AMS
https://www.readbyqxmd.com/read/29368146/irritant-induced-asthma-to-hypochlorite-in-mice-due-to-impairment-of-the-airway-barrier
#15
Sofie Van Den Broucke, Lore Pollaris, Greetje Vande Velde, Erik Verbeken, Benoit Nemery, Jeroen Vanoirbeek, Peter Hoet
Inhalation of commonly present irritants, such as chlorine and chlorine derivatives, can cause adverse respiratory effects, including irritant-induced asthma (IIA). We hypothesize that due to airway barrier impairment, exposure to hypochlorite (ClO- ) can result in airway hypersensitivity. C57Bl/6 mice received an intra-peritoneal (i.p.) injection of the airway damaging agent naphthalene (NA, 200 mg/kg body weight) or vehicle (mineral oil, MO). In vivo micro-computed tomography (CT) images of the lungs were acquired before and at regular time points after the i...
April 2018: Archives of Toxicology
https://www.readbyqxmd.com/read/29349730/ccn5-in-alveolar-epithelial-proliferation-and-differentiation-during-neonatal-lung-oxygen-injury
#16
Najla Fiaturi, Joshua W Russo, Heber C Nielsen, John J Castellot
Lung immaturity is the major cause of morbidity and mortality in premature infants, especially those born <28 weeks of gestation. These infants are at high risk of developing respiratory distress syndrome (RDS), a lung disease caused by insufficient surfactant production and immaturity of saccular/alveolar type II epithelial cells in the lung. RDS treatment includes oxygen and respiratory support that improve survival but also increase the risk for bronchopulmonary dysplasia (BPD), a chronic lung disease characterized by arrested alveolarization, airway hyperreactivity, and pulmonary hypertension...
March 2018: Journal of Cell Communication and Signaling
https://www.readbyqxmd.com/read/29343807/house-dust-mite-induced-allergic-airway-disease-is-attenuated-in-cd11ccreil-4r%C3%AE-l%C3%A2-x-mice
#17
Natalie Eva Nieuwenhuizen, Frank Kirstein, Jennifer Claire Hoving, Frank Brombacher
The precise mechanisms leading to development of T helper type (Th)2-driven allergic responses are unknown. We aimed to determine how IL-4 receptor alpha (IL-4Rα) signaling on CD11c+ cells influences allergen-induced Th2 responses in mice. CD11ccreIL-4Rα-/l°x mice, deficient in IL-4Rα on dendritic cells and alveolar macrophages, were compared to IL-4Rα-/l°x littermate controls in models of allergic airway disease induced by OVA/alum, OVA alone or house dust mite. Cytokine responses, eosinophil and neutrophil infiltration into the lungs, airway hyperreactivity and mucus hypersecretion were evaluated after allergen challenge...
January 17, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29331644/ozone-exposure-induces-respiratory-barrier-biphasic-injury-and-inflammation-controlled-by-il-33
#18
Chloé Michaudel, Claire Mackowiak, Isabelle Maillet, Louis Fauconnier, Cezmi A Akdis, Milena Sokolowska, Anita Dreher, Hern-Tze Tina Tan, Valérie F Quesniaux, Bernhard Ryffel, Dieudonnée Togbe
BACKGROUND: IL-33 plays a critical role in regulation of tissue homeostasis, injury, and repair. Whether IL-33 regulates neutrophil recruitment and functions independently of airways hyperresponsiveness (AHR) in the setting of ozone-induced lung injury and inflammation is unclear. OBJECTIVE: We sought to examine the role of the IL-33/ST2 axis in lung inflammation on acute ozone exposure in mice. METHODS: ST2- and Il33-deficient, IL-33 citrine reporter, and C57BL/6 (wild-type) mice underwent a single ozone exposure (1 ppm for 1 hour) in all studies...
January 10, 2018: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/29329322/methylene-tetrahydrofolate-reductase-contributes-to-allergic-airway-disease
#19
Kenneth R Eyring, Brent S Pedersen, Kenneth N Maclean, Sally P Stabler, Ivana V Yang, David A Schwartz
RATIONALE: Environmental exposures strongly influence the development and progression of asthma. We have previously demonstrated that mice exposed to a diet enriched with methyl donors during vulnerable periods of fetal development can enhance the heritable risk of allergic airway disease through epigenetic changes. There is conflicting evidence on the role of folate (one of the primary methyl donors) in modifying allergic airway disease. OBJECTIVES: We hypothesized that blocking folate metabolism through the loss of methylene-tetrahydrofolate reductase (Mthfr) activity would reduce the allergic airway disease phenotype through epigenetic mechanisms...
2018: PloS One
https://www.readbyqxmd.com/read/29319332/nebivolol-attenuates-oxidative-stress-and-inflammation-in-a-guinea-pig-model-of-ovalbumin-induced-asthma-a-possible-mechanism-for-its-favorable-respiratory-effects
#20
Sally A Abuelezz
An experimental model of ovalbumin (OVA) induced asthma was used to assess the effects of nebivolol, the third-generation selective β1 -adrenergic receptor blocker, on airway reactivity, lung inflammation, and oxidative stress markers. The asthma induction protocol was done by OVA sensitization and challenge. Guinea pigs were classified into control, asthmatic, or asthmatic receiving nebivolol either 7.5 or 15 mg·kg-1 ·day-1 orally. At the end of the study respiratory, the anti-inflammatory and antioxidative effects of nebivolol were assessed...
March 2018: Canadian Journal of Physiology and Pharmacology
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