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Hyperreactive Airway

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https://www.readbyqxmd.com/read/28275108/maternal-high-fat-diet-in-mice-leads-to-innate-airway-hyperresponsiveness-in-the-adult-offspring
#1
Kelvin D MacDonald, Aurelia R Moran, Ashley J Scherman, Cindy T McEvoy, Astrid S Platteau
Maternal obesity prior to and during pregnancy has been associated with an increased incidence of childhood asthma. As diets rich in saturated fat are linked to obesity and inflammation, we created a murine model to investigate the effect of maternal high-fat diet (HFD) on adult offspring airway hyperreactivity (AHR), a cardinal feature of asthma. Balb/cByJ dams were fed a HFD (60% fat Calories) or normal-fat diet (NFD) (10% fat Calories) from 8 weeks prior to first breeding through their pregnancies. Pups were weaned to either a HFD or NFD (at 4 weeks of age)...
March 2017: Physiological Reports
https://www.readbyqxmd.com/read/28258108/newly-divided-eosinophils-limit-ozone-induced-airway-hyperreactivity-in-non-sensitized-guinea-pigs
#2
Sarah Anne Wicher, David B Jacoby, Allison D Fryer
Ozone causes vagally-mediated airway hyperreactivity and recruits inflammatory cells, including eosinophils, to lungs where they mediate ozone-induced hyperreactivity one day after exposure, but are paradoxically protective three days later. To test the role of newly divided eosinophils in ozone-induced airway hyperreactivity in sensitized and non-sensitized guinea pigs. Non-sensitized and sensitized guinea pigs were treated with 5-bromo-2-deoxyuridine (BrdU) to label newly divided cells and were exposed to air or ozone for 4 hours...
March 3, 2017: American Journal of Physiology. Lung Cellular and Molecular Physiology
https://www.readbyqxmd.com/read/28223414/the-flavonoid-cyanidin-blocks-binding-of-the-cytokine-interleukin-17a-to-the-il-17ra-subunit-to-alleviate-inflammation-in-vivo
#3
Caini Liu, Liang Zhu, Koichi Fukuda, Suidong Ouyang, Xing Chen, Chenhui Wang, Cun-Jin Zhang, Bradley Martin, Chunfang Gu, Luke Qin, Suguna Rachakonda, Mark Aronica, Jun Qin, Xiaoxia Li
Cyanidin, a key flavonoid that is present in red berries and other fruits, attenuates the development of several diseases, including asthma, diabetes, atherosclerosis, and cancer, through its anti-inflammatory effects. We investigated the molecular basis of cyanidin action. Through a structure-based search for small molecules that inhibit signaling by the proinflammatory cytokine interleukin-17A (IL-17A), we found that cyanidin specifically recognizes an IL-17A binding site in the IL-17A receptor subunit (IL-17RA) and inhibits the IL-17A/IL-17RA interaction...
February 21, 2017: Science Signaling
https://www.readbyqxmd.com/read/28194433/mitochondrial-camkii-inhibition-in-airway-epithelium-protects-against-allergic-asthma
#4
Sara C Sebag, Olha M Koval, John D Paschke, Christopher J Winters, Omar A Jaffer, Ryszard Dworski, Fayyaz S Sutterwala, Mark E Anderson, Isabella M Grumbach
Excessive ROS promote allergic asthma, a condition characterized by airway inflammation, eosinophilic inflammation, and increased airway hyperreactivity (AHR). The mechanisms by which airway ROS are increased and the relationship between increased airway ROS and disease phenotypes are incompletely defined. Mitochondria are an important source of cellular ROS production, and our group discovered that Ca(2+)/calmodulin-dependent protein kinase II (CaMKII) is present in mitochondria and activated by oxidation...
February 9, 2017: JCI Insight
https://www.readbyqxmd.com/read/28178290/prenatal-exposure-to-respiratory-syncytial-virus-alters-postnatal-immunity-and-airway-smooth-muscle-contractility-during-early-life-reinfections
#5
Paul M Brown, Terri J Harford, Vandana Agrawal, Belinda Yen-Lieberman, Fariba Rezaee, Giovanni Piedimonte
Maternal viral infections can have pathological effects on the developing fetus which last long after birth. Recently, maternal-fetal transmission of respiratory syncytial virus (RSV) was shown to cause postnatal airway hyperreactivity (AHR) during primary early-life reinfection; however, the influence of prenatal exposure to RSV on offspring airway immunity and smooth muscle contractility during recurrent postnatal reinfections remains unknown. Therefore, we sought to determine whether maternal RSV infection impairs specific aspects of cell-mediated offspring immunity during early-life reinfections and the mechanisms leading to AHR...
2017: PloS One
https://www.readbyqxmd.com/read/28174048/the-effects-of-particulate-matter-on-inflammation-of-respiratory-system-differences-between-male-and-female
#6
Kelly Yoshizaki, Jôse Mára Brito, Luiz Fernando Silva, Adriana Lino-Dos-Santos-Franco, Daniela Perroni Frias, Renata Calciolari Rossi E Silva, Luís Fernando Amato-Lourenço, Paulo Hilário Nascimento Saldiva, Iolanda de Fátima Lopes Calvo Tibério, Thais Mauad, Mariangela Macchione
Air pollution is known to exacerbate respiratory diseases and epidemiological studies have shown that women present more chronic respiratory symptoms than man exposed to traffic pollution, however, the reason why is unclear. This study evaluated the inflammatory differences in BALB/c mouse males (n=34) and females (n=111) in three phases of the estrous cycle that were exposed to ambient air (AA) or concentrated ambient particles (CAPs). Tracheal hyperreactivity to methacholine, bronchoalveolar lavage fluid (BALF) and immunohistochemical of airways and lung parenchyma were studied...
May 15, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28160290/regulatory-t-cells-and-type-2-innate-lymphoid-cell-dependent-asthma
#7
REVIEW
J L Aron, O Akbari
Group 2 innate lymphoid cells (ILC2s) are a recently identified group of cells with the potent capability to produce Th2-type cytokines such as interleukin (IL)-5 and IL-13. Several studies suggest that ILC2s play an important role in the development of allergic diseases and asthma. Activation of pulmonary ILC2s in murine models lacking T and B cells induces eosinophilia and airway hyper-reactivity (AHR), which are cardinal features of asthma. More importantly, numerous recent studies have highlighted the role of ILC2s in asthma persistence and exacerbation among human subjects, and thus, regulation of pulmonary ILC2s is a major area of investigation aimed at curbing allergic lung inflammation and exacerbation...
February 4, 2017: Allergy
https://www.readbyqxmd.com/read/28140833/nanoparticles-induced-apoptosis-of-human-airway-epithelium-is-mediated-by-prongf-p75-ntr-signaling
#8
Sreeparna Chakraborty, Vincent Castranova, Miriam K Perez, Giovanni Piedimonte
Environmental and occupational exposures to respirable ultrafine fractions of particulate matter (PM) have been implicated in the initiation and exacerbation of lung diseases. However, the precise mechanisms underlying production of cell damage and death attributed to nanoparticles (NP) on human airway epithelium are not fully understood. This study examined the role of neurotrophic pathways in NP-induced airway toxicity. Size and agglomeration of TiO2 nanoparticles (TiO2-NP) and fine (TiO2-FP) particles were measured by dynamic light scattering...
2017: Journal of Toxicology and Environmental Health. Part A
https://www.readbyqxmd.com/read/28111308/notch-signaling-in-t-cells-is-essential-for-allergic-airway-inflammation-but-expression-of-the-notch-ligands-jagged-1-and-jagged-2-on-dendritic-cells-is-dispensable
#9
Irma Tindemans, Melanie Lukkes, Marjolein J W de Bruijn, Bobby W S Li, Menno van Nimwegen, Derk Amsen, Alex KleinJan, Rudi W Hendriks
BACKGROUND: Allergic asthma is characterized by a TH2 response induced by dendritic cells (DCs) that present inhaled allergen. Although the mechanisms by which they instruct TH2 differentiation are still poorly understood, expression of the Notch ligand Jagged on DCs has been implicated in this process. OBJECTIVE: We sought to establish whether Notch signaling induced by DCs is critical for house dust mite (HDM)-driven allergic airway inflammation (AAI) in vivo...
January 19, 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28091773/the-nervous-system-of-airways-and-its-remodeling-in-inflammatory-lung-diseases
#10
REVIEW
Katrin Julia Audrit, Lucas Delventhal, Öznur Aydin, Christina Nassenstein
Inflammatory lung diseases are associated with bronchospasm, cough, dyspnea and airway hyperreactivity. The majority of these symptoms cannot be primarily explained by immune cell infiltration. Evidence has been provided that vagal efferent and afferent neurons play a pivotal role in this regard. Their functions can be altered by inflammatory mediators that induce long-lasting changes in vagal nerve activity and gene expression in both peripheral and central neurons, providing new targets for treatment of pulmonary inflammatory diseases...
January 14, 2017: Cell and Tissue Research
https://www.readbyqxmd.com/read/28063042/murine-models-of-allergic-asthma
#11
Eline Haspeslagh, Nincy Debeuf, Hamida Hammad, Bart N Lambrecht
Allergic asthma is a heterogeneous inflammatory lung disease affecting millions of people worldwide and with a steadily increasing incidence. Mouse models have been of utmost importance in uncovering key inflammatory cell types, cytokines, and pathways in the development and maintenance of allergic asthma. Historically, the mainstay in experimental asthma research was sensitizing rodents to the model protein antigen ovalbumin (OVA) with the pro-Th2 adjuvant aluminum hydroxide, followed by repetitive OVA exposures to the airways to initiate a Th2-skewed adaptive immune response leading to eosinophilic airway inflammation and airway hyperreactivity (AHR)...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28056550/co-inhalation-of-roflumilast-rather-than-formoterol-with-fluticasone-more-effectively-improves-asthma-in-asthmatic-mice
#12
Hussam A Murad, Hamed S Habib, Misbahuddin M Rafeeq, Mansour I Sulaiman, Amer S Abdulrahman, Mohamad Nidal Khabaz
Roflumilast is approved as an add-on therapy for chronic obstructive pulmonary disease. The inflammation in chronic obstructive pulmonary disease is mainly neutrophilic, while in asthma it is mainly eosinophilic, studies addressing role of roflumilast in eosinophilic inflammation are recommended. Also in severe asthma, the dominant inflammatory cells are neutrophils. Thus, roflumilast has a potential off-label use in the treatment of asthma. This study was designed to evaluate the effects of co-inhalation of roflumilast and fluticasone compared to that of formoterol and fluticasone in ovalbumin-sensitized and-challenged BALB/c mice...
January 1, 2017: Experimental Biology and Medicine
https://www.readbyqxmd.com/read/28030368/sphingolipids-ormdl3-and-asthma-what-is-the-evidence
#13
Tilla S Worgall
PURPOSE OF REVIEW: Genome-wide association studies identified ORMDL3, a protein of the endoplasmic reticulum, as a significant asthma risk factor. ORMDL3 is one of three ORMDL proteins that integrate multiple signals to maintain sphingolipid homeostasis. Studies that investigated potential mechanisms for how increased ORMDL3 might affect asthma are summarized. RECENT FINDINGS: Investigations focused on decreased sphingolipid synthesis and on the unfolded protein response because ORMDL3 had been implicated in both...
March 2017: Current Opinion in Clinical Nutrition and Metabolic Care
https://www.readbyqxmd.com/read/28025241/clinical-tools-to-assess-asthma-control-in-children
#14
Chitra Dinakar, Bradley E Chipps
Asthma affects an estimated 7 million children and causes significant health care and disease burden. The most recent iteration of the National Heart, Lung and Blood Institute asthma guidelines, the Expert Panel Report 3, emphasizes the assessment and monitoring of asthma control in the management of asthma. Asthma control refers to the degree to which the manifestations of asthma are minimized by therapeutic interventions and the goals of therapy are met. Although assessment of asthma severity is used to guide initiation of therapy, monitoring of asthma control helps determine whether therapy should be maintained or adjusted...
January 2017: Pediatrics
https://www.readbyqxmd.com/read/28009478/local-effects-on-airway-inflammation-and-systemic-uptake-of-5-nm-pegylated-and-citrated-gold-nanoparticles-in-asthmatic-mice
#15
Albert J Omlor, Duc D Le, Janine Schlicker, Matthias Hannig, Raphael Ewen, Sebastian Heck, Christian Herr, Annette Kraegeloh, Christina Hein, Ralf Kautenburger, Guido Kickelbick, Robert Bals, Juliane Nguyen, Q Thai Dinh
Nanotechnology is showing promise in many medical applications such as drug delivery and hyperthermia. Nanoparticles administered to the respiratory tract cause local reactions and cross the blood-air barrier, thereby providing a means for easy systemic administration but also a potential source of toxicity. Little is known about how these effects are influenced by preexisting airway diseases such as asthma. Here, BALB/c mice are treated according to the ovalbumin (OVA) asthma protocol to promote allergic airway inflammation...
December 23, 2016: Small
https://www.readbyqxmd.com/read/28002727/allergen-exposure-when-timing-is-everything
#16
Tanel Mahlakõiv, David Artis
It is known that young children exposed to allergens are prone to develop asthma later in life. In this issue of Immunity, de Kleer et al. (2016) identify IL-33 as a key player in the developing lung for sensitization to environmental allergens and airway hyperreactivity.
December 20, 2016: Immunity
https://www.readbyqxmd.com/read/27995616/b-cell-subsets-are-modulated-during-allergic-airway-inflammation-but-are-not-required-for-the-development-of-respiratory-tolerance-in-a-murine-model
#17
Anika Habener, Ann-Kathrin Behrendt, Jelena Skuljec, Adan Chari Jirmo, Almut Meyer-Bahlburg, Gesine Hansen
Allergic asthma is a widespread chronic inflammatory disease of the airways. The role of different B cell subsets in developing asthma and respiratory tolerance is not well known. Especially regulatory B (Breg) cells are proposed to be important in asthma regulation. Using wild-type (WT) and B cell-deficient (μMT) mice we investigated how B cells are affected by induction of allergic airway inflammation and respiratory tolerance and whether they are necessary to develop these conditions. WT mice with an asthma-like phenotype, characterized by increased airway hyper reactivity, eosinophilic airway inflammation, mucus hypersecretion and elevated Th2 cytokines, exhibited increased MHCII and CD23 expression on follicular mature B cells in lung, bronchial lymph nodes (bLN) and spleen, which contributed to allergen-specific T cell proliferation in vitro...
December 20, 2016: European Journal of Immunology
https://www.readbyqxmd.com/read/27982078/a-tnfrsf14-fc%C3%A9-ri-mast-cell-pathway-contributes-to-development-of-multiple-features-of-asthma-pathology-in-mice
#18
Riccardo Sibilano, Nicolas Gaudenzio, Marianne K DeGorter, Laurent L Reber, Joseph D Hernandez, Philipp M Starkl, Oliwia W Zurek, Mindy Tsai, Sonja Zahner, Stephen B Montgomery, Axel Roers, Mitchell Kronenberg, Mang Yu, Stephen J Galli
Asthma has multiple features, including airway hyperreactivity, inflammation and remodelling. The TNF superfamily member TNFSF14 (LIGHT), via interactions with the receptor TNFRSF14 (HVEM), can support TH2 cell generation and longevity and promote airway remodelling in mouse models of asthma, but the mechanisms by which TNFSF14 functions in this setting are incompletely understood. Here we find that mouse and human mast cells (MCs) express TNFRSF14 and that TNFSF14:TNFRSF14 interactions can enhance IgE-mediated MC signalling and mediator production...
December 16, 2016: Nature Communications
https://www.readbyqxmd.com/read/27935998/pro-resolving-effects-of-resolvin-d2-in-ltd4-and-tnf-%C3%AE-pre-treated-human-bronchi
#19
Rayan Khaddaj-Mallat, Chantal Sirois, Marco Sirois, Edmond Rizcallah, Sofia Marouan, Caroline Morin, Éric Rousseau
Inflammation is a major burden in respiratory diseases, resulting in airway hyperresponsiveness. Our hypothesis is that resolution of inflammation may represent a long-term solution in preventing human bronchial dysfunctions. The aim of the present study was to assess the anti-inflammatory effects of RvD2, a member of the D-series resolving family, with concomitant effects on ASM mechanical reactivity. The role and mode of action of RvD2 were assessed in an in vitro model of human bronchi under pro-inflammatory conditions, induced either by 1 μM LTD4 or 10 ng/ml TNF-α pre-treatment for 48h...
2016: PloS One
https://www.readbyqxmd.com/read/27913141/acute-lung-injury-and-persistent-small-airway-disease-in-a-rabbit-model-of-chlorine-inhalation
#20
Sadiatu Musah, Connie F Schlueter, David M Humphrey, Karen S Powell, Andrew M Roberts, Gary W Hoyle
Chlorine is a pulmonary toxicant to which humans can be exposed through accidents or intentional releases. Acute effects of chlorine inhalation in humans and animal models have been well characterized, but less is known about persistent effects of acute, high-level chlorine exposures. In particular, animal models that reproduce the long-term effects suggested to occur in humans are lacking. Here, we report the development of a rabbit model in which both acute and persistent effects of chlorine inhalation can be assessed...
January 15, 2017: Toxicology and Applied Pharmacology
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