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Airway inflammation

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https://www.readbyqxmd.com/read/28644724/modeling-long-term-effects-attributed-to-nitrogen-dioxide-no2-and-sulfur-dioxide-so2-exposure-on-asthma-morbidity-in-a-nationwide-cohort-in-israel
#1
N Greenberg, R S Carel, E Derazne, A Tiktinsky, D Tzur, B A Portnov
Studies have provided extensive documentation that acutely elevated environmental exposures contribute to chronic health problems. However, only attention has been paid to the effects of modificate of exposure assessment methods in environmental health investigations, leading to uncertainty and gaps in our understanding of exposure- and dose-response relationships. The goal of the present study was to evaluate whether average or peak concentration exerts a greater influence on asthma outcome, and which of the exposure models may better explain various physiological responses generated by nitrogen dioxide (NO2) or sulfur dioxide (SO2) air pollutants...
June 23, 2017: Journal of Toxicology and Environmental Health. Part A
https://www.readbyqxmd.com/read/28643622/lung-microbiota-and-its-impact-on-the-mucosal-immune-phenotype
#2
Benjamin G Wu, Leopoldo N Segal
The use of culture-independent techniques has allowed us to appreciate that the upper and lower respiratory tract contain a diverse community of microbes in health and disease. Research has only recently explored the effects of the microbiome on the host immune response. The exposure of the human body to the bacterial environment is an important factor for immunological development; thus, the interaction between the microbiome and its host is critical to understanding the pathogenesis of disease. In this article, we discuss the mechanisms that determine the composition of the airway microbiome and its effects on the host immune response...
June 2017: Microbiology Spectrum
https://www.readbyqxmd.com/read/28638955/lipopolysaccharide-induced-ccn1-production-enhances-interleukin-6-secretion-in-bronchial-epithelial-cells
#3
Lin Shi, Nian Dong, Dongxiang Ji, Xiaomin Huang, Zhaojian Ying, Xiangdong Wang, Chengshui Chen
Acute lung injury/acute respiratory distress syndrome (ALI/ARDS) is a clinical complication caused by primary or secondary lung injury, as well as by systemic inflammation. Researches regarding molecular pathophysiology of ALI/ARDS are immerging with an ultimate aim towards developing prognostic molecular biomarkers and molecule-based therapy. However, the molecular mechanisms concerning ALI/ARDS are still not completely understood. The purpose of the present study was to identify a crucial role of CCN1 in inflammatory microenvironment during ALI/ARDS and focus on a potential communication between CCN1 and interleukin-6 (IL-6) in the airway epithelial cells...
June 21, 2017: Cell Biology and Toxicology
https://www.readbyqxmd.com/read/28638384/induced-regulatory-t-cells-superimpose-their-suppressive-capacity-with-effector-t-cells-in-lymph-nodes-via-antigen-specific-s1p1-dependent-egress-blockage
#4
Shuang Geng, Yiwei Zhong, Xiaoyu Zhou, Gan Zhao, Xiaoping Xie, Yechun Pei, Hu Liu, Huiyuan Zhang, Yan Shi, Bin Wang
Regulatory T cells (Tregs) restrict overexuberant lymphocyte activation. While close proximity between Tregs and their suppression targets is important for optimal inhibition, and literature indicates that draining lymph nodes (LNs) may serve as a prime location for the suppression, signaling details orchestrating this event are not fully characterized. Using a protocol to enable peripheral generation of inducible antigen-specific Tregs (asTregs) to control allergen-induced asthma, we have identified an antigen-specific mechanism that locks asTregs within hilar LNs which in turn suppresses airway inflammation...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28636794/differences-and-similarities-between-bronchopulmonary-dysplasia-and-asthma-in-schoolchildren
#5
Björn Nordlund, Anna James, Christina Ebersjö, Gunilla Hedlin, Eva B Broström
BACKGROUND: The long-term respiratory characteristics of ex-preterm children with bronchopulmonary dysplasia (BPD) are not established. The objective of this study was to describe hallmarks of BPD at school age in comparison to children with atopic asthma. METHODS: This study was a cross-sectional descriptive comparative study in a hospital-based setting. Thirty schoolchildren diagnosed with BPD (10.4 years/born at 26.6 weeks' gestation) and 30 age- and sex-matched children with asthma and sensitized to airborne allergens (IgE >0...
June 21, 2017: Pediatric Pulmonology
https://www.readbyqxmd.com/read/28636383/gene-expression-profiling-in-human-lung-cells-exposed-to-isoprene-derived-secondary-organic-aerosol
#6
Ying-Hsuan Lin, Maiko Arashiro, Phillip W Clapp, Tianqu Cui, Kenneth G Sexton, William Vizuete, Avram Gold, Ilona Jaspers, Rebecca C Fry, Jason Douglas Surratt
Secondary organic aerosol (SOA) derived from the photochemical oxidation of isoprene contributes a substantial mass fraction to atmospheric fine particulate matter (PM2.5). The formation of isoprene SOA is influenced largely by anthropogenic emissions through multiphase chemistry of its multi-generational oxidation products. Considering the abundance of isoprene SOA in the troposphere, understanding mechanisms of adverse health effects through inhalation exposure is critical to mitigating its potential impact on public health...
June 21, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28635659/divergent-how-ige-axis-contributes-to-the-continuum-of-allergic-asthma-and-anti-ige-therapies
#7
REVIEW
Óscar Palomares, Silvia Sánchez-Ramón, Ignacio Dávila, Luis Prieto, Luis Pérez de Llano, Marta Lleonart, Christian Domingo, Antonio Nieto
Asthma is an airway disease characterised by chronic inflammation with intermittent or permanent symptoms including wheezing, shortness of breath, chest tightness, and cough, which vary in terms of their occurrence, frequency, and intensity. The most common associated feature in the airways of patients with asthma is airway inflammation. In recent decades, efforts have been made to characterise the heterogeneous clinical nature of asthma. The interest in improving the definitions of asthma phenotypes and endotypes is growing, although these classifications do not always correlate with prognosis nor are always appropriate therapeutic approaches...
June 21, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28635619/on-the-importance-of-accurate-quantification-of-individual-volatile-metabolites-in-exhaled-breath
#8
David Smith, Patrik Spanel
It is argued that shortcomings of certain approaches to breath analysis research based on superficial interpretation of non-quantitative data are inadvertently inhibiting the progression of non-invasive breath analysis into clinical practice. The objective of this perspective is to suggest more clinically profitable approaches to breath research. Thus, following a discourse on the challenges and expectations in breath research, a brief indication is given of the analytical techniques currently used for the analysis of very humid exhaled breath...
June 21, 2017: Journal of Breath Research
https://www.readbyqxmd.com/read/28635548/th-17-regulatory-cytokines-il-21-il-23-and-il-6-enhance-neutrophil-production-of-il-17-cytokines-during-asthma
#9
Rabih Halwani, Asma Sultana, Alejandro Vazquez-Tello, Amer Jamhawi, Abeer A Al-Masri, Saleh Al-Muhsen
BACKGROUND: In a subset of severe asthma patients, chronic airway inflammation is associated with infiltration of neutrophils, Th-17 cells and elevated expression of Th-17-derived cytokines (e.g., interleukin [IL]-17, IL-21, IL-22). Peripheral neutrophils from allergic asthmatics are known to express higher IL-17 cytokine levels than those from healthy subjects, but the regulatory mechanisms involved are not well understood. We hypothesize that Th-17 regulatory cytokines could modulate IL-17 expression in neutrophils...
March 2, 2017: Journal of Asthma: Official Journal of the Association for the Care of Asthma
https://www.readbyqxmd.com/read/28635361/role-of-licochalcone-a-in-vegf-induced-proliferation-of-human-airway-smooth-muscle-cells-implications-for-asthma
#10
Sung-Ho Kim, Qing-Mei Pei, Ping Jiang, Min Yang, Xue-Jiao Qian, Jiang-Bo Liu
Asthma is a chronic respiratory disease characterized by reversible airway obstruction with persistent airway inflammation and airway remodeling, which is associated with increased airway smooth muscle (ASM) mass. Licochalcone A is the predominant characteristic chalcone in licorice root. We found that licochalcone A inhibited vascular endothelial growth factor (VEGF)-induced ASM cell proliferation and induced cell cycle arrest. Additionally, VEGF-induced ASM cell proliferation was suppressed via inhibition of extracellular signal-regulated kinase 1/2 (ERK1/2) activity, but not that of Akt...
February 2017: Growth Factors
https://www.readbyqxmd.com/read/28635197/depression-anxiety-and-chronic-pain-in-patients-with-chronic-obstructive-pulmonary-disease-the-influence-of-breath
#11
Bruno Bordoni, Fabiola Marelli, Bruno Morabito, Beatrice Sacconi
Chronic obstructive pulmonary disease (COPD) is a major public health problems, causing significant mortality and morbidity in the world. It is a complex and progressive disease, characterized by chronic inflammation and dysfunction of the respiratory airways. The article reviews the available information on the potential role of the diaphragm in this disease. The purpose is to identify a potential correlation between symptoms such as depression, anxiety and chronic pain, frequently observed in COPD, with the activity of the diaphragm...
May 25, 2017: Monaldi Archives for Chest Disease, Archivio Monaldi Per le Malattie del Torace
https://www.readbyqxmd.com/read/28634241/psl-produced-by-mucoid-pseudomonas-aeruginosa-contributes-to-the-establishment-of-biofilms-and-immune-evasion
#12
Christopher J Jones, Daniel J Wozniak
Despite years of research and clinical advances, chronic pulmonary infections with mucoid Pseudomonas aeruginosa remain the primary concern for cystic fibrosis patients. Much of the research on these strains has focused on the contributions of the polysaccharide alginate; however, it is becoming evident that the neutral polysaccharide Psl also contributes to biofilm formation and the maintenance of chronic infections. Here, we demonstrate that Psl produced by mucoid strains has significant roles in biofilm structure and evasion of immune effectors...
June 20, 2017: MBio
https://www.readbyqxmd.com/read/28634005/semaphorin-3e-alleviates-hallmarks-of-house-dust-mite-induced-allergic-airway-disease
#13
Hesam Movassagh, Lianyu Shan, Jonathan S Duke-Cohan, Andrew J Halayko, Jude E Uzonna, Abdelilah S Gounni
Semaphorins are an essential family of guidance cues ubiquitously expressed in various organs, which play diverse developmental, homeostatic, and pathological roles. Semaphorin 3E (Sema3E), initially identified as a neuronal chemorepellent, is involved in the regulation of cell migration, proliferation, and angiogenesis. However, expression and function of Sema3E in allergic asthma has not been extensively investigated. We determined the expression of Sema3E in the airways and its effect on airway inflammation, hyperresponsiveness, and remodeling as pathological features of allergic asthma provoked by house dust mite in vivo...
July 2017: American Journal of Pathology
https://www.readbyqxmd.com/read/28630656/physical-activity-black-carbon-exposure-and-dna-methylation-in-the-foxp3-promoter
#14
Stephanie Lovinsky-Desir, Kyung Hwa Jung, Jacqueline R Jezioro, David Z Torrone, Mariangels de Planell-Saguer, Beizhan Yan, Frederica P Perera, Andrew G Rundle, Matthew S Perzanowski, Steven N Chillrud, Rachel L Miller
BACKGROUND: Physical activity is associated with improvement in lung function; however, pollution exposure during physical activity can lead to a transient reduction in lung function. This paradoxical relationship may be linked to altered T regulatory (Treg) cell activity, which increases with exercise and suppresses airway inflammation, but decreases in association with exposure to air pollution. To clarify these relationships, we investigated buccal cell DNA methylation of the forkhead box p3 (FOXP3) gene promoter, a proposed biomarker of Treg activity...
2017: Clinical Epigenetics
https://www.readbyqxmd.com/read/28630636/targeting-tumor-microenvironment-effects-of-chinese-herbal-formulae-on-macrophage-mediated-lung-cancer-in-mice
#15
Fei Xu, Wenqiang Cui, Zhengxiao Zhao, Weiyi Gong, Ying Wei, Jiaqi Liu, Mihui Li, Qiuping Li, Chen Yan, Jian Qiu, Baojun Liu, Jingcheng Dong
Our previous studies have shown that Qing-Re-Huo-Xue (QRHX) formulae had significant anti-inflammatory effects in chronic airway diseases such as asthma and chronic obstructive lung disease. Here, we examined the effects of QRHX on lung cancer cell invasion and the potential associated mechanism(s), mainly polarization of macrophages in the tumor microenvironment. In vivo, QRHX both inhibited tumor growth and decreased the number of tumor-associated macrophages (TAMs) in mice with lung cancer. Further study indicated that QRHX inhibited cancer-related inflammation in tumor by decreasing infiltration of TAMs and IL-6 and TNF-α production and meanwhile decreased arginase 1 (Arg-1) expression and increased inducible NO synthase (iNOS) expression...
2017: Evidence-based Complementary and Alternative Medicine: ECAM
https://www.readbyqxmd.com/read/28630596/association-between-hmgb1-and-asthma-a-literature-review
#16
REVIEW
Egidio Imbalzano, Sebastiano Quartuccio, Eleonora Di Salvo, Teresa Crea, Marco Casciaro, Sebastiano Gangemi
BACKGROUND: Recently, some studies demonstrated that HMGB1, as proinflammatory mediator belonging to the alarmin family, has a key role in different acute and chronic immune disorders. Asthma is a complex disease characterised by recurrent and reversible airflow obstruction associated to airway hyper-responsiveness and airway inflammation. OBJECTIVE: This literature review aims to analyse advances on HMGB1 role, employment and potential diagnostic application in asthma...
2017: Clinical and Molecular Allergy: CMA
https://www.readbyqxmd.com/read/28629745/exposure-to-non-microbial-n-glycolylneuraminic-acid-protects-farmers-children-against-airway-inflammation-and-colitis
#17
Remo Frei, Ruth Ferstl, Caroline Roduit, Mario Ziegler Dipl-Ing, Elisa Schiavi, Weronika Barcik, Noelia Rodriguez-Perez, Oliver F Wirz, Marcin Wawrzyniak, Benoit Pugin, Dirk Nehrbass, Marek Jutel, Sylwia Smolinska, Patrycja Konieczna, Christian Bieli, Susanne Loeliger, Marco Waser, Göran Pershagen, Josef Riedler, Martin Depner, Bianca Schaub, Jon Genuneit, Harald Renz, Juha Pekkanen, Anne M Karvonen, Jean-Charles Dalphin, Marianne van Hage, Gert Doekes, Mübeccel Akdis, Charlotte Braun-Fahrländer, Cezmi A Akdis, Erika von Mutius, Liam O'Mahony, Roger P Lauener
BACKGROUND: Childhood exposure to a farm environment has been shown to protect against the development of inflammatory diseases such as allergy, asthma, and inflammatory bowel disease. OBJECTIVE: We sought to investigate whether besides exposure to microbes also exposure to structures of non-microbial origin such as the sialic acid N-Glycolylneuraminic acid (Neu5Gc) may play a significant role. METHODS: Exposure to Neu5Gc was evaluated by quantifying anti-Neu5Gc antibody levels in the sera of children enrolled in two farm studies: the PARSIFAL study (n=299) and the PASTURE birth cohort (cord blood (n=836), 1 year (n=734), 4...
June 16, 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28628665/a-chromosome-5q31-1-locus-associates-with-tuberculin-skin-test-reactivity-in-hiv-positive-individuals-from-tuberculosis-hyper-endemic-regions-in-east-africa
#18
Rafal S Sobota, Catherine M Stein, Nuri Kodaman, Isaac Maro, Wendy Wieland-Alter, Robert P Igo, Albert Magohe, LaShaunda L Malone, Keith Chervenak, Noemi B Hall, Mecky Matee, Harriet Mayanja-Kizza, Moses Joloba, Jason H Moore, William K Scott, Timothy Lahey, W Henry Boom, C Fordham von Reyn, Scott M Williams, Giorgio Sirugo
One in three people has been infected with Mycobacterium tuberculosis (MTB), and the risk for MTB infection in HIV-infected individuals is even higher. We hypothesized that HIV-positive individuals living in tuberculosis-endemic regions who do not get infected by Mycobacterium tuberculosis are genetically resistant. Using an "experiment of nature" design that proved successful in our previous work, we performed a genome-wide association study of tuberculin skin test positivity using 469 HIV-positive patients from prospective study cohorts of tuberculosis from Tanzania and Uganda to identify genetic loci associated with MTB infection in the context of HIV-infection...
June 19, 2017: PLoS Genetics
https://www.readbyqxmd.com/read/28628664/effects-of-diesel-exhaust-particle-exposure-on-a-murine-model-of-asthma-due-to-soybean
#19
Daniel Alvarez-Simón, Xavier Muñoz, Susana Gómez-Ollés, Miquel de Homdedeu, María-Dolores Untoria, María-Jesús Cruz
BACKGROUND: Exposure to soybean allergens has been linked to asthma outbreaks. Exposure to diesel exhaust particles (DEP) has been associated with an increase in the risk of asthma and asthma exacerbation; however, in both cases the underlying mechanisms remain poorly understood, as does the possible interaction between the two entities. OBJECTIVE: To investigate how the combination of soybean allergens and DEP can affect the induction or exacerbation of asthma in a murine model...
2017: PloS One
https://www.readbyqxmd.com/read/28628641/hypersensitivity-pneumonitis-onset-and-severity-is-regulated-by-cd103-dendritic-cell-expression
#20
Emilie Bernatchez, Anick Langlois, Julyanne Brassard, Nicolas Flamand, David Marsolais, Marie-Renée Blanchet
BACKGROUND: Pulmonary dendritic cells drive lung responses to foreign antigens, including Saccharopolyspora rectivirgula, a causative agent of hypersensitivity pneumonitis. While the airway inflammatory mechanisms involved in hypersensitivity pneumonitis are well described, the mechanisms leading to the break in homeostasis and hypersensitivity pneumonitis onset are not well-described, and could involve CD103+ dendritic cells, which are found at baseline and during inflammatory responses in the lung...
2017: PloS One
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