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Basophil asthma

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https://www.readbyqxmd.com/read/28612233/targeting-the-pgd2-crth2-dp1-signaling-pathway-in-asthma-and-allergic-disease-current-status-and-future-perspectives
#1
Maciej Kupczyk, Piotr Kuna
Prostaglandin D2 (PGD2) released by degranulating mast cells is believed to play a key role in orchestrating mechanisms of inflammation in allergies and asthma. The biological effects of PGD2 are mediated by D-prostanoid (DP1), CRTH2 (DP2), and thromboxane prostanoid (TP) receptors. The CRTH2 receptor is involved in induction of migration and activation of T helper type 2 (Th2) lymphocytes, eosinophils, and basophils; up-regulation of adhesion molecules; and promotion of pro-inflammatory Th2-type cytokines (interleukin [IL]-4, 5, 13), whereas the DP receptor is associated with relaxation of smooth muscles, vasodilation, inhibition of cell migration, and apoptosis of eosinophils...
June 13, 2017: Drugs
https://www.readbyqxmd.com/read/28581121/omalizumab-effectively-protects-against-early-and-late-allergic-responses-in-asthma-after-4-weeks
#2
Jordis Trischler, Adrian Lieb, Melina Arnold, Johannes Schulze, Martin Rosewich, Ralf Schubert, Ivan Bottoli, Stefan Zielen
Omalizumab is licensed for therapy in severe allergic asthma with an effect demonstrated after 8 weeks or longer treatment. Since new applications for omalizumab demand precise knowledge of the onset of effects, the objective of this study was to determine the time course of the early (EAR) and late allergic reaction (LAR). Ten patients (IgE >300 IU/mL and <700 IU/mL) with a significant response to allergen challenge were treated with omalizumab according to the approved dosing table. Bronchial allergen provocations (BAP) were repeated at week 1, 2, 4 and 8...
June 5, 2017: Allergy
https://www.readbyqxmd.com/read/28561329/sputum-basophils-and-asthma-diagnosis-dawn-of-a-new-era
#3
EDITORIAL
Michaela Fux, Christophe von Garnier
More than 40 years ago, Kimura et al. discovered that basophils are enriched in sputum samples of asthma patients (1). Since then, various scientific approaches have attempted to elucidate the role of basophils in the pathophysiology of asthma. The scarcity of basophils and technical limitations of earlier studies have made it difficult to increase our understanding how basophils affect the disease course in asthma. This article is protected by copyright. All rights reserved.
May 31, 2017: Allergy
https://www.readbyqxmd.com/read/28493549/transcription-factor-rbp-j-mediated-signaling-regulates-basophil-s-immunoregulatory-function-in-mouse-asthma-model
#4
Shuo-Yao Qu, Ya-Long He, Jian Zhang, Chang-Gui Wu
Basophils (BAs) play an important role in the promotion of aberrant Th2 immune response in asthma. It is not only the effective cell, but also modulates initiation of Th2 immune responses. We earlier demonstrated that Notch signaling regulates the biological function of BAs in vitro. However, whether this pathway plays the same role in vivo is not clear. The purpose of the present study was to investigate the effect of Notch signaling on BA's function in the regulation of allergic airway inflammation in a murine model of asthma...
May 11, 2017: Immunology
https://www.readbyqxmd.com/read/28483235/basophil-activation-test-for-inhalant-allergens-in-pediatric-patients-with-allergic-rhinitis
#5
Ismail Ogulur, Ayca Kiykim, Safa Baris, Ahmet Ozen, Ezgi Gizem Yuce, Elif Karakoc-Aydiner
OBJECTIVE: Flow cytometric quantification of in vitro basophil activation can be quite performant and reliable tool to measure IgE-dependent allergen-specific responses in allergic patients. Current study aimed to evaluate the clinical relevance of basophil activation test (BAT) for the diagnosis of pediatric grass pollen and house dust mite (HDM) allergies. METHODS: Forty-seven patients suffering from allergic rhinitis with HDM and grass pollen co-sensitization with clinical history of allergic rhinitis and/or asthma and 15 non-allergic healthy subjects were enrolled...
June 2017: International Journal of Pediatric Otorhinolaryngology
https://www.readbyqxmd.com/read/28474843/n-glycan-in-cockroach-allergen-regulates-human-basophil-function
#6
Danh C Do, Shuang Yang, Xu Yao, Robert G Hamilton, John T Schroeder, Peisong Gao
INTRODUCTION: Cockroach allergen exposure elicits cockroach sensitization and poses an increased risk for asthma. However, the major components in cockroach allergen and the mechanisms underlying the induction of cockroach allergen-induced allergy and asthma remain largely elusive. We sought to examine the role of cockroach-associated glycan in regulating human basophil function. METHODS: N-linked glycans from naturally purified cockroach allergen Bla g 2 were characterized by MALDI-TOF mass spectrometry...
February 20, 2017: Immunity, Inflammation and Disease
https://www.readbyqxmd.com/read/28474352/airway-basophils-are-increased-and-activated-in-eosinophilic-asthma
#7
Yoshihiro Suzuki, Keiko Wakahara, Tomoko Nishio, Satoru Ito, Yoshinori Hasegawa
BACKGROUND: The impact of basophils on asthma pathogenesis remains largely unexplored, particularly in humans. Here, we evaluated the frequencies and activation status of basophils in the sputum of adult asthmatic patients and related our findings to other parameters of eosinophilic airway inflammation. METHODS: We enrolled 44 adult asthmatic patients who were being treated with inhaled corticosteroids (ICS). Analysis of the induced sputum, exhaled nitric oxide fraction (FeNO) measurement, and Asthma Control Test (ACT) were carried out together with standard blood and pulmonary function tests...
May 5, 2017: Allergy
https://www.readbyqxmd.com/read/28463786/innate-immunity-as-the-orchestrator-of-allergic-airway-inflammation-and-resolution-in-asthma
#8
REVIEW
Despoina Thiriou, Ioannis Morianos, Georgina Xanthou, Konstantinos Samitas
The respiratory system is constantly in direct contact with the environment and, has therefore, developed strong innate and adaptive immune responses to combat pathogens. Unlike adaptive immunity which is mounted later in the course of the immune response and is naive at the outset, innate immunity provides the first line of defense against microbial agents, while also promoting resolution of inflammation. In the airways, innate immune effector cells mainly consist of eosinophils, neutrophils, mast cells, basophils, macrophages/monocytes, dendritic cells and innate lymphoid cells, which attack pathogens directly or indirectly through the release of inflammatory cytokines and antimicrobial peptides, and coordinate T and B cell-mediated adaptive immunity...
April 29, 2017: International Immunopharmacology
https://www.readbyqxmd.com/read/28441991/in-vitro-impact-of-anti-immunoglobulin-e-monoclonal-antibodies-including-omalizumab-on-whole-blood-basophil-histamine-release-assessment-of-direct-induction-of-basophil-histamine-release-and-evaluation-of-modulation-of-allergen-induced-basophil-histamine-release
#9
Krzysztof Kowal, Pawel Bielecki, Ilona V DuBuske, Lawrence M DuBuske
AIM: The aim of this study was to evaluate the potential of anti-immunoglobulin E (IgE) and/or anti-IgE-IgE immune complexes to release histamine from peripheral blood basophils. In addition, a potential modulating effect of anti-IgE-IgE complexes on allergen-induced peripheral blood basophil histamine release was evaluated. METHODS: Whole blood basophil histamine release (WBB-HR) tests done by using glass-fiber-based microtiter plates were performed in 62 patients with allergic rhinitis and/or asthma sensitized to perennial allergens...
May 1, 2017: Allergy and Asthma Proceedings:
https://www.readbyqxmd.com/read/28426171/sputum-basophils-are-increased-in-eosinophilic-asthma-compared-with-non-eosinophilic-asthma-phenotypes
#10
Collin R Brooks, Christine J van Dalen, Ian F Hermans, Peter G Gibson, Jodie L Simpson, Jeroen Douwes
Sputum basophil numbers are increased in allergic asthmatics, but it is unclear what role airway basophils play in "TH2-low" asthma phenotypes. Using flow cytometry we found that basophils were significantly increased in all asthmatics (n=26) compared with healthy controls (n=8) (p=0.007) with highest levels observed in eosinophilic asthma (EA; median 0.22%, IQR 0.11-0.47%; n=14) compared with non-EA (0.06%, 0.00-0.20%; n=12; p<0.05). In asthmatics, basophils were positively correlated with sputum eosinophils (r=0...
April 20, 2017: Allergy
https://www.readbyqxmd.com/read/28266165/il33-and-il1rl1-variants-are-associated-with-asthma-and-atopy-in-a-brazilian-population
#11
G A Queiroz, R S Costa, N M Alcantara-Neves, G Nunes de Oliveira Costa, M L Barreto, V L Carneiro, C A Figueiredo
Atopic asthma is a chronic inflammatory disease in airways resulting from genetic and environmental factors, characterized by production of the Th2 cytokines interleukin-4 (IL-4), interleukin-5 (IL-5) and interleukin-13 (IL-13). Interleukin-33 (IL-33) appears to be a potent inducer of Th2 immune response. This occurs when IL-33 binds and activates its receptor, the membrane ST2 (ST2L) in mast cells, dendritic cells, basophils, eosinophils, innate lymphoids and Th2 cells, leading to the release of these cytokines and intensifying allergic inflammation...
April 2017: International Journal of Immunogenetics
https://www.readbyqxmd.com/read/28258965/assessment-of-in-vivo-mast-cell-reactivity-in-patients-with-systemic-mastocytosis
#12
T Gülen, C Möller Westerberg, K Lyberg, M Ekoff, J Kolmert, J Bood, J Öhd, A James, S-E Dahlén, G Nilsson, B Dahlén
BACKGROUND: Patients with systemic mastocytosis (SM) have clinical signs of mast cell (MC) activation and increased levels of MC mediators. It is unclear whether the increased mediator levels are caused by increased numbers of tissue MCs, or whether these cells in affected individuals have a hyperactive phenotype. OBJECTIVE: To determine reactivity of the skin and the airways to directly acting mediators and indirectly acting mast cell secretagogues in subjects with SM...
March 4, 2017: Clinical and Experimental Allergy: Journal of the British Society for Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28254561/extracorporeal-ige-immunoadsorption-in-allergic-asthma-safety-and-efficacy
#13
RANDOMIZED CONTROLLED TRIAL
Christian Lupinek, Kurt Derfler, Silvia Lee, Thomas Prikoszovich, Oliver Movadat, Eva Wollmann, Carolin Cornelius, Milena Weber, Renate Fröschl, Regina Selb, Katharina Blatt, Dubravka Smiljkovic, Volker Schoder, René Cervenka, Thomas Plaichner, Gottfried Stegfellner, Hans Huber, Rainer Henning, Justyna Kozik-Jaromin, Thomas Perkmann, Verena Niederberger, Ventzislav Petkov, Peter Valent, Adelheid Gauly, Hans Peter Leinenbach, Ingrid Uhlenbusch-Koerwer, Rudolf Valenta
BACKGROUND: Prevention of IgE-binding to cellular IgE-receptors by anti-IgE (Omalizumab) is clinically effective in allergic asthma, but limited by IgE threshold-levels. To overcome this limitation, we developed a single-use IgE immunoadsorber column (IgEnio). IgEnio is based on a recombinant, IgE-specific antibody fragment and can be used for the specific extracorporeal desorption of IgE. OBJECTIVE: To study safety and efficacy of IgEnio regarding the selective depletion of IgE in a randomized, open-label, controlled pilot trial in patients with allergic asthma and to investigate if IgEnio can bind IgE-Omalizumab immune complexes...
March 2017: EBioMedicine
https://www.readbyqxmd.com/read/28252235/toll-like-receptor-induced-expression-of-epithelial-cytokine-receptors-on-haemopoietic-progenitors-is-altered-in-allergic-asthma
#14
D Tworek, D Heroux, S N O'Byrne, P Mitchell, P M O'Byrne, J A Denburg
BACKGROUND: Haemopoietic progenitor cells (HPC) migrate to sites of allergic inflammation where, upon stimulation with epithelial cytokines, they produce Th2 cytokines and differentiate into mature eosinophils and basophils. They also express Toll-like receptors (TLR) involved in antimicrobial responses. OBJECTIVE: The objective of this study was to compare TLR expression on peripheral blood HPC and TLR-induced responses, in particular changes in epithelial cytokine receptors, in healthy and asthmatic subjects at baseline and following allergen challenge...
March 1, 2017: Clinical and Experimental Allergy: Journal of the British Society for Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28244660/bioactive-food-chemicals-and-gastrointestinal-symptoms-a-focus-of-salicylates
#15
REVIEW
Sreepurna Malakar
Bioactive food chemicals are substances present in food that are capable of interacting with living cells causing changes in physiological functions. Salicylic acid (SA), a plant hormone involved in plant immune response, is one such bioactive food chemical. Aspirin, a commercially available SA, might play beneficial roles in cardiovascular health and colon cancer. It may also cause urticaria, angioedema, asthma, and gastrointestinal symptoms in SA-sensitive individuals. Dietary SA might exert similar beneficial effects and/or may induce similar symptoms in hypersensitive individuals...
March 2017: Journal of Gastroenterology and Hepatology
https://www.readbyqxmd.com/read/28102118/myeloid-cells-in-asthma
#16
Bart N Lambrecht, Emma K Persson, Hamida Hammad
Asthma is a heterogeneous chronic inflammatory disorder of the airways, and not surprisingly, many myeloid cells play a crucial role in pathogenesis. Antigen-presenting dendritic cells are the first to recognize the allergens, pollutants, and viruses that are implicated in asthma pathogenesis, and subsequently initiate the adaptive immune response by migrating to lymph nodes. Eosinophils are the hallmark of type 2 inflammation, releasing toxic compounds in the airways and contributing to airway remodeling. Mast cells and basophils control both the early- and late-phase allergic response and contribute to alterations in smooth muscle reactivity...
January 2017: Microbiology Spectrum
https://www.readbyqxmd.com/read/28069425/an-epigenome-wide-association-study-of-total-serum-ige-in-hispanic-children
#17
Wei Chen, Ting Wang, Maria Pino-Yanes, Erick Forno, Liming Liang, Qi Yan, Donglei Hu, Daniel E Weeks, Andrea Baccarelli, Edna Acosta-Perez, Celeste Eng, Yueh-Ying Han, Nadia Boutaoui, Catherine Laprise, Gwyneth A Davies, Julian M Hopkin, Miriam F Moffatt, William O C M Cookson, Glorisa Canino, Esteban G Burchard, Juan C Celedón
BACKGROUND: Total IgE is a therapeutic target in patients with allergic diseases. DNA methylation in white blood cells (WBCs) was associated with total IgE levels in an epigenome-wide association study of white subjects. Whether DNA methylation of eosinophils explains these findings is insufficiently understood. METHODS: We tested for association between genome-wide DNA methylation in WBCs and total IgE levels in 2 studies of Hispanic children: the Puerto Rico Genetics of Asthma and Lifestyle Study (PR-GOAL; n = 306) and the Genes-environments and Admixture in Latino Americans (GALA II) study (n = 573)...
January 6, 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/27992791/catalpol-alleviates-ovalbumin-induced-asthma-in-mice-reduced-eosinophil-infiltration-in-the-lung
#18
Yanyan Chen, Yongzheng Zhang, Mingyuan Xu, Junqi Luan, Shengai Piao, Shuang Chi, Hai Wang
BACKGROUND: Radix Rehmanniae Preparata is a traditional Chinese herbal medicine used to treat asthma, and catalpol is one of the main active ingredients in this herb. In the present study, the effects of catalpol on asthma and the underlying mechanism were explored. METHODS: Mice with ovalbumin (OVA)-induced asthma were given 5 or 10mg/kg catalpol from Day 15 to Day 28 (intraperitoneal injection). Histopathologic changes were detected by Hematoxylin and Eosin staining and Periodic Acid Schiff staining...
February 2017: International Immunopharmacology
https://www.readbyqxmd.com/read/27939673/perinatal-activation-of-the-interleukin-33-pathway-promotes-type-2-immunity-in-the-developing-lung
#19
Ismé M de Kleer, Mirjam Kool, Marjolein J W de Bruijn, Monique Willart, Justine van Moorleghem, Martijn J Schuijs, Maud Plantinga, Rudi Beyaert, Emily Hams, Padraic G Fallon, Hamida Hammad, Rudi W Hendriks, Bart N Lambrecht
Allergic disease originates in early life and polymorphisms in interleukin-33 gene (IL33) and IL1RL1, coding for IL-33R and decoy receptor sST2, confer allergy risk. Early life T helper 2 (Th2) cell skewing and allergy susceptibility are often seen as remnants of feto-maternal symbiosis. Here we report that shortly after birth, innate lymphoid type 2 cells (ILC2s), eosinophils, basophils, and mast cells spontaneously accumulated in developing lungs in an IL-33-dependent manner. During the phase of postnatal lung alveolarization, house dust mite exposure further increased IL-33, which boosted cytokine production in ILC2s and activated CD11b(+) dendritic cells (DCs)...
December 20, 2016: Immunity
https://www.readbyqxmd.com/read/27856823/mepolizumab-in-the-management-of-severe-eosinophilic-asthma-in-adults-current-evidence-and-practical-experience
#20
Gilda Varricchi, Diego Bagnasco, Matteo Ferrando, Francesca Puggioni, Giovanni Passalacqua, Giorgio W Canonica
Eosinophils represent approximately 1% of peripheral blood leukocytes in normal donors and their maturation and differentiation in the bone marrow are mainly regulated by interleukin (IL)-5 [Broughton et al. 2015]. IL-5, a cytokine that belongs to the β common-chain family, together with IL-3 and granulocyte-macrophage colony-stimulating factor (GM-CSF), stimulates also the activation and survival of eosinophils and, to some extent, of basophils. IL-5 binds to a heterodimer receptor composed of the specific subunit IL-5Rα and a common subunit βc shared with IL-3 and GM-CSF...
January 2017: Therapeutic Advances in Respiratory Disease
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