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Mast cell asthma

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https://www.readbyqxmd.com/read/29146574/mast-cell-dependent-il-33-st2-signaling-is-protective-against-the-development-of-airway-hyperresponsiveness-in-a-house-dust-mite-mouse-model-of-asthma
#1
Anna Maria Zoltowska Nilsson, Ying Lei, Mikael Adner, Gunnar P Nilsson
Interleukin-33 (IL-33) and its receptor ST2 have been influentially associated to the pathophysiology of asthma. Due to the divergent roles of IL-33 in regulating mast cell functions, there is a need to further characterize IL-33/ST2-dependent mast cell responses and their significance in the context of asthma. This study aimed to investigate how IL-33/ST2-dependent mast cell responses contribute to the development of airway hyperresponsiveness (AHR) and airway inflammation in a mouse model of house dust mite (HDM) induced asthma...
November 16, 2017: American Journal of Physiology. Lung Cellular and Molecular Physiology
https://www.readbyqxmd.com/read/29132961/title-experimental-asthma-persists-in-il33-receptor-knockout-mice-due-to-the-emergence-of-a-tslp-driven-il9-and-il13-ilc2-subpopulations
#2
Mukesh Verma, Sucai Liu, Lidia Michalec, Anand Sripada, Magdalena M Gorska, Rafeul Alam
BACKGROUND: IL33 plays an important role in development of experimental asthma. OBJECTIVE: To study the role of the IL33 receptor (ST2) in persistence of asthma in a mouse model. METHODS: We studied allergen-induced experimental asthma in ST2 knockout (KO) and wild-type control mice. We measured airway hyperresponsiveness (AHR) by flexivent, inflammatory indices by ELISA, histology and real-time PCR, and ILC2s in lung single cell preparations by flow cytometry...
November 10, 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/29114894/lack-of-long-term-add-on-effect-by-montelukast-in-postoperative-chronic-rhinosinusitis-patients-with-nasal-polyps
#3
Laura Van Gerven, Cristobal Langdon, Arturo Cordero, Sara Cardelús, Joaquim Mullol, Isam Alobid
OBJECTIVES/HYPOTHESIS: Eosinophils and mast cells are among the key cells in inflammatory diseases like chronic rhinosinusitis (CRS) and asthma. Leukotriene antagonists have proven to be effective in the treatment of asthma, but data about their efficacy in CRS are scarce, whereas data on montelukast as an add-on treatment to intranasal corticosteroids (INCS) in a postoperative setting are completely lacking. STUDY DESIGN: Prospective, randomized, open-label trial...
November 8, 2017: Laryngoscope
https://www.readbyqxmd.com/read/29076828/airway-remodeling-in-asthma-update-on-mechanisms-and-therapeutic-approaches
#4
Louis-Philippe Boulet
PURPOSE OF REVIEW: The term 'airway remodeling' reflects changes in the type, quantity, and nature of airway wall components and their organization. The purpose of this review is to look at recent publications on airway remodeling in asthma. RECENT FINDINGS: Animal models and in-vitro studies have confirmed the involvement of airway epithelium, airway smooth muscle (ASM), and extracellular matrix components in asthma-related airway remodeling. They report influences on proliferation of ASM cells, and how their orientation or morphology, in addition to the heterogeneity of ASM mass at different levels of airways could influence their effects...
October 25, 2017: Current Opinion in Pulmonary Medicine
https://www.readbyqxmd.com/read/29066080/piper-nigrum-extract-ameliorated-allergic-inflammation-through-inhibiting-th2-th17-responses-and-mast-cells-activation
#5
Thi Tho Bui, Chun Hua Piao, Chang Ho Song, Hee Soon Shin, Dong-Hwa Shon, Ok Hee Chai
Piper nigrum (Piperaceae) is commonly used as a spice and traditional medicine in many countries. P. nigrum has been reported to have anti-oxidant, anti-bacterial, anti-tumor, anti-mutagenic, anti-diabetic, and anti-inflammatory properties. However, the effect of P. nigrum on allergic asthma has not been known. This study investigated the effect of P. nigrum ethanol extracts (PNE) on airway inflammation in asthmatic mice model. In the ovalbumin (OVA)-induced allergic asthma model, we analysed the number of inflammatory cells and cytokines production in bronchoalveolar lavage fluid (BALF) and lung tissue; histological structure; as well as the total immunoglobulin (Ig)E, anti-OVA IgE, anti-OVA IgG1 and histamine levels in serum...
October 16, 2017: Cellular Immunology
https://www.readbyqxmd.com/read/29059080/leukotrienes-and-kidney-diseases
#6
Menachem Rubinstein, Efrat Dvash
PURPOSE OF REVIEW: This review will critically highlight the role of leukotrienes as mediators of renal diseases and drug nephrotoxicity. It will also discuss the recently identified mechanism of cysteinyl leukotrienes induction and action, and will propose clinical implementation of these findings. RECENT FINDINGS: Since last reviewed in 1994, leukotrienes were shown to mediate drug-associated nephrotoxicity, transplant rejection and morbidity in several models of renal diseases...
November 7, 2017: Current Opinion in Nephrology and Hypertension
https://www.readbyqxmd.com/read/29042937/inflammation-and-airway-remodeling-of-the-lung-in-guinea-pigs-with-allergic-rhinitis
#7
Zu-Yao Chen, Shou-Hong Zhou, Qiao-Feng Zhou, Hong-Bo Tang
Allergic rhinitis (AR) and asthma belong to the category of type I allergic diseases, whose pathological features are airway remodeling of the lung and allergic inflammation. The aim of the present study was to evaluate inflammation and remodeling of lung tissue in a guinea pig model of AR in order to confirm consistent pathological changes of upper and lower airways in AR. Male guinea pigs were randomly divided into an experimental and a control group (n=10 in each). The AR model was established by sensitization through intraperitoneal injection of ovalbumin for three weeks and bilateral nasal local excitation for twelve weeks...
October 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29038008/fibrinogen-cleavage-products-and-toll-like-receptor-4-promote-the-generation-of-programmed-cell-death-1-ligand-2-positive-dendritic-cells-in-allergic-asthma
#8
Minkyoung Cho, Jeong-Eun Lee, Hoyong Lim, Hyun-Woo Shin, Roza Khalmuratova, Garam Choi, Hyuk Soon Kim, Wahn Soo Choi, Young-Jun Park, Inbo Shim, Byung-Seok Kim, Chang-Yuil Kang, Jae-Ouk Kim, Shinya Tanaka, Masato Kubo, Yeonseok Chung
BACKGROUND: Inhaled protease allergens preferentially trigger TH2-mediated inflammation in allergic asthma. The role of dendritic cells (DCs) on induction of TH2 cell responses in allergic asthma has been well documented; however, the mechanism by which protease allergens induce TH2-favorable DCs in the airway remains unclear. OBJECTIVE: We sought to determine a subset of DCs responsible for TH2 cell responses in allergic asthma and the mechanism by which protease allergens induce the DC subset in the airway...
October 14, 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/29018800/asthma-endotypes-and-an-overview-of-targeted-therapy-for-asthma
#9
REVIEW
Sarah Svenningsen, Parameswaran Nair
Guidelines for the management of severe asthma do not emphasize the measurement of the inflammatory component of airway disease to indicate appropriate treatments or to monitor response to treatment. Inflammation is a central component of asthma and contributes to symptoms, physiological, and structural abnormalities. It can be assessed by a number of endotyping strategies based on "omics" technology such as proteomics, transcriptomics, and metabolomics. It can also be assessed using simple cellular responses by quantitative cytometry in sputum...
2017: Frontiers in Medicine
https://www.readbyqxmd.com/read/28983485/anti-ige-treatment-for-disorders-other-than-asthma
#10
REVIEW
Jeffrey Stokes
Immunoglobulin E (IgE) plays a key role in the pathogenesis of many allergic diseases. Thus, IgE-mediated immunologic pathways are an attractive target for intervention in allergic diseases. Omalizumab is a recombinant humanized monoclonal antibody that binds IgE and has been used treat allergic asthma for over a decade. Currently, omalizumab is approved for the treatment of both allergic asthma and chronic spontaneous urticaria. Since IgE plays a critical role in other allergic diseases, anti-IgE therapy has been evaluated in other allergic diseases in small clinical trials and case reports...
2017: Frontiers in Medicine
https://www.readbyqxmd.com/read/28964637/neuroendocrine-cells-derived-chemokine-vasoactive-intestinal-polypeptide-vip-in-allergic-diseases
#11
REVIEW
Alok K Verma, Murli Manohar, Sathisha Upparahalli Venkateshaiah, Anil Mishra
Worldwide increase incidences of allergic diseases have heightened the interest of clinicians and researchers to understand the role of neuroendocrine cells in the recruitment and activation of inflammatory cells. Several pieces of evidence revealed the association of neuropeptides in the pathogenesis of allergic diseases. Importantly, one such peptide that is secreted by neuronal cells and immune cells exerts a wide spectrum of immunological functions as cytokine/chemokine is termed as Vasoactive Intestinal Peptide (VIP)...
September 23, 2017: Cytokine & Growth Factor Reviews
https://www.readbyqxmd.com/read/28960335/airway-pathology-in-severe-asthma-is-related-to-airflow-obstruction-but-not-symptom-control
#12
D S Ferreira, R M Carvalho-Pinto, M G Gregório, R Annoni, A M Teles, M Buttignol, B B Araújo-Paulino, E H Katayama, B L Oliveira, H S Del Frari, A Cukier, M Dolhnikoff, R Stelmach, K F Rabe, T Mauad
BACKGROUND: Patients with asthma present structural and inflammatory alterations that are believed to play a role in disease severity. However, airway remodeling and inflammation have not been extensively investigated in relation to both symptom control and airflow obstruction in severe asthmatics. We aimed to investigate several inflammatory and structural pathological features in bronchial biopsies of severe asthmatics that could be related to symptom control and airflow obstruction after standardized treatment...
September 27, 2017: Allergy
https://www.readbyqxmd.com/read/28952282/activation-and-inhibition-of-adaptive-immune-response-mediated-by-mast-cells
#13
E Toniato, I Frydas, I Robuffo, G Ronconi, Al Caraffa, S K Kritas, P Conti
Adaptive immune response plays an important role against bacteria and parasites, a reaction that also involves mast cell (MC) activation which participates in innate and adaptive immunity. In allergic reactions there is a TH2 immune response with generation of allergen-specific IgE antibodies. In MCs, IgE cross-link FcRI high affinity receptor and activate tyrosine kinase proteins, leading to stimulation of NF-κB and AP-1 resulting in the release of a number of cytokines/chemokines and other compounds. Through their proteolytic pathways, MCs may process the antigen for presentation to CD4+ cells which release TH2 cytokines and growth factors, which play an important role in asthma, allergy, anaphylaxis and inflammation...
July 2017: Journal of Biological Regulators and Homeostatic Agents
https://www.readbyqxmd.com/read/28950944/emerging-roles-for-mas-related-g-protein-coupled-receptor-x2-in-host-defense-peptide-opioid-and-neuropeptide-mediated-inflammatory-reactions
#14
Hydar Ali
Mast cells (MCs) are tissue-resident immune cells that contribute to host defense but are best known for their roles in allergic and inflammatory diseases. In humans, MCs are divided into two subtypes based on the protease content of their secretory granules. Thus, human lung MCs contain only tryptase and are known as MCT, whereas skin MCs contain both tryptase and chymase and are known as MCTC. Patients with severe asthma display elevated MCs in the lung, which undergo phenotypic change from MCT to MCTC. Although the human genome contains four Mas related G protein coupled receptor X (MRGPRX) genes, an important feature of MCTC is that they selectively express MRGPRX2...
2017: Advances in Immunology
https://www.readbyqxmd.com/read/28950943/%C3%AE-2-adrenoceptor-function-in-asthma
#15
Yassine Amrani, Peter Bradding
β2-adrenoceptor agonists, often used in combination with corticosteroids, have been extensively used for the treatment of asthma. However, concerns have been raised regarding their adverse effects and safety including poor asthma control, life-threatening exacerbations, exacerbations that often require hospitalization, and asthma-related deaths. The question as to whether these adverse effects relate to the loss of their bronchoprotective action remains an interesting possibility. In the chapter, we will review the experimental evidence that describes the different potential factors and associated mechanisms that can blunt the therapeutic action of β2-adrenoceptor agonists in asthma...
2017: Advances in Immunology
https://www.readbyqxmd.com/read/28942146/leptin-positively-regulates-muc5ac-production-and-secretion-induced-by-interleukin-13-in-human-bronchial-epithelial-cells
#16
Wanming Hao, Jing Wang, Yu Zhang, Yunying Wang, Lixin Sun, Wei Han
Mucus hypersecretion and plugging of lower respiratory tract airways due to mucus plugs have long been recognized as the leading cause of the morbidity and mortality in asthma. MUC5AC protein is a major component of airway mucus. Here, we showed that interleukin (IL)-13 induced MUC5AC production and secretion, and leptin expression in the human bronchial epithelial cell line-16 (HBE16) cells in a concentration-dependent manner. Leptin knockdown suppressed MUC5AC production and secretion induced by IL-13. We further investigated the molecular mechanism by which leptin functioned, and found that leptin regulated IL-13-induced MUC5AC production and secretion via the JAK2-STAT3 pathway...
November 18, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28939897/identification-of-a-specific-agonist-of-human-tas2r14-from-radix-bupleuri-through-virtual-screening-functional-evaluation-and-binding-studies
#17
Yuxin Zhang, Xing Wang, Xi Li, Sha Peng, Shifeng Wang, Christopher Z Huang, Corine Z Huang, Qiao Zhang, Dai Li, Jun Jiang, Qin Ouyang, Yanling Zhang, Shiyou Li, Yanjiang Qiao
Bitter taste receptors (TAS2Rs) have attracted a great deal of interest because of their recently described bronchodilator and anti-inflammatory properties. The aim of this study was to identify natural direct TAS2R14 agonists from Radix Bupleuri that can inhibit mast cell degranulation. A ligand-based virtual screening was conducted on a library of chemicals contained in compositions of Radix Bupleuri, and these analyses were followed by cell-based functional validation through a HEK293-TAS2R14-G16gust44 cell line and IgE-induced mast cell degranulation assays, respectively...
September 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28933920/multi-tissue-transcriptomics-delineates-the-diversity-of-airway-t-cell-functions-in-asthma
#18
Akul Singhania, Joshua C Wallington, Caroline G Smith, Daniel Horowitz, Karl J Staples, Peter H Howarth, Stephan D Gadola, Ratko Djukanović, Christopher H Woelk, Timothy Sc Hinks
Asthma arises from the complex interplay of inflammatory pathways in diverse cell types and tissues. We sought to undertake a comprehensive transcriptomic assessment of the epithelium and airway T cells that remain understudied in asthma, and investigate interactions between multiple cells and tissues. Epithelial brushings and flow-sorted CD3+ T cells from sputum and bronchoalveolar lavage were obtained from healthy subjects (N=19) and asthmatic patients (mild, moderate and severe asthma; N=46). Gene expression was assessed using Affymetrix HT HG-U133+ PM GeneChips and results were validated by real-time quantitative PCR...
September 21, 2017: American Journal of Respiratory Cell and Molecular Biology
https://www.readbyqxmd.com/read/28923762/vitamin-d-in-asthma-mechanisms-of-action-and-considerations-for-clinical-trials
#19
REVIEW
Paul E Pfeffer, Catherine M Hawrylowicz
There is increasing interest in the therapeutic utility of vitamin D in asthma, which is supported by a significant body of evidence on epidemiologic associations between vitamin D insufficiency and worse asthma control. In support of a causal relationship, vitamin D beneficially modulates diverse immunologic pathways in heterogeneous asthma endotypes, regulating the actions of lymphocytes, mast cells, antigen-presenting cells, and structural cells to dampen excessive inflammatory responses. Allergic asthma is characterized by a failure of immune tolerance and the development of pathologic responses to inhaled aeroallergens, and vitamin D has been extensively shown to support immune regulation...
September 18, 2017: Chest
https://www.readbyqxmd.com/read/28920926/particulate-allergens-potentiate-allergic-asthma-in-mice-through-sustained-ige-mediated-mast-cell-activation
#20
Cong Jin, Christopher P Shelburne, Guojie Li, Erin N Potts, Kristina J Riebe, Gregory D Sempowski, W Michael Foster, Soman N Abraham
No abstract text is available yet for this article.
October 2, 2017: Journal of Clinical Investigation
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