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Asthma pathogenesis

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https://www.readbyqxmd.com/read/28629263/mass-spectrometry-based-analysis-of-murine-bronchoalveolar-lavage-fluid-following-respiratory-exposure-to-4-4-methylene-diphenyl-diisocyanate-aerosol
#1
Justin M Hettick, Brandon F Law, Chen-Chung Lin, Adam V Wisnewski, Paul D Siegel
Diisocyanates are highly reactive electrophiles utilized in the manufacture of a wide range of polyurethane products, and have been identified as causative agents of occupational allergic respiratory disease. However, in spite of the significant occupational health burden associated with diisocyanate-induced asthma, the mechanism of disease pathogenesis remains largely unknown. To better understand the fate of inhaled diisocyanates, a nose-only aerosol exposure system was constructed and utilized to expose a BALB/c mouse model to aerosol generated from 4,4'-methylene diphenyl diisocyanate (MDI)...
June 20, 2017: Xenobiotica; the Fate of Foreign Compounds in Biological Systems
https://www.readbyqxmd.com/read/28626982/vaginal-seeding-or-vaginal-microbial-transfer-from-the-mother-to-the-cesarean-born-neonate-a-commentary-regarding-clinical-management
#2
Thor Haahr, Julie Glavind, Paul Axelsson, Margit Bistrup Fischer, Johanna Bjurström, Gudbjörg Andrésdóttir, Dorte Teilmann-Jørgensen, Ulla Bonde, Nina Olsén Sørensen, Margrethe Møller, Jens Fuglsang, Per G Ovesen, Jesper P Petersen, Jakob Stokholm, Tine D Clausen
Recent evidence suggests cesarean delivery (CD) to be a risk factor for inflammatory and metabolic diseases such as asthma, allergies and other chronic immune disorders in the child. One hypothetical pathogenesis of these associations has been proposed to be a disruption of the neonatal colonization (NC) after CD. To further support this hypothesis, it has been observed that the effect of CD on NC was different according to type of CD, i.e. planned or emergency, and that the risk of asthma in children born by CD was mitigated by rupture of membranes, though still increased compared to children delivered vaginally...
June 18, 2017: BJOG: An International Journal of Obstetrics and Gynaecology
https://www.readbyqxmd.com/read/28624706/bilirubin-nanoparticles-ameliorate-allergic-lung-inflammation-in-a-mouse-model-of-asthma
#3
Dong Eon Kim, Yonghyun Lee, MinGyo Kim, Soyoung Lee, Sangyong Jon, Seung-Hyo Lee
Although asthma, a chronic inflammatory airway disease, is relatively well-managed by inhaled corticosteroids, the side effects associated with the long-term use of these agents precipitate the need for alternative therapeutic options based on differing modes of action. Bilirubin, a potent endogenous antioxidant, and anti-inflammatory molecule have been shown to ameliorate asthmatic symptoms; however, its clinical translation has been limited owing to its water insolubility and associated potential toxicity...
June 12, 2017: Biomaterials
https://www.readbyqxmd.com/read/28614630/prevalence-of-atopic-disease-in-patients-with-eosinophilic-esophagitis
#4
Michael S Benninger, Madeleine Strohl, Chantal E Holy, Andrea L Hanick, Paul C Bryson
BACKGROUND: The objective of this work was to evaluate prevalence of eosinophilic esophagitis (EoE) in the United States, and analyze prevalence of atopic disease in patients with EoE. The study design was a retrospective administrative database analysis in U.S.-based outpatient settings. METHODS: A retrospective claims analysis in the inpatient and outpatient setting (using MarketScan) was conducted to analyze prevalence of atopic disease diagnoses in patients with EoE in 2012, and timing of those diagnoses vs EoE...
June 14, 2017: International Forum of Allergy & Rhinology
https://www.readbyqxmd.com/read/28609485/self-reported-racial-ethnic-discrimination-and-bronchodilator-response-in-african-american-youth-with-asthma
#5
Sonia Carlson, Luisa N Borrell, Celeste Eng, Myngoc Nguyen, Shannon Thyne, Michael A LeNoir, Nadine Burke-Harris, Esteban G Burchard, Neeta Thakur
IMPORTANCE: Asthma is a multifactorial disease composed of endotypes with varying risk profiles and outcomes. African Americans experience a high burden of asthma and of psychosocial stress, including racial discrimination. It is unknown which endotypes of asthma are vulnerable to racial/ethnic discrimination. OBJECTIVE: We examined the association between self-reported racial/ethnic discrimination and bronchodilator response (BDR) among African American youth with asthma ages 8 to 21 years (n = 576) and whether this association varies with tumor necrosis factor alpha (TNF-α) level...
2017: PloS One
https://www.readbyqxmd.com/read/28606589/regulatory-effects-of-interleukin-il-15-on-allergen-induced-airway-obstruction
#6
Sathisha Upparahalli Venkateshaiah, Xiang Zhu, Priya Rajavelu, Rituraj Niranjan, Murli Manohar, Alok K Verma, Joseph A Lasky, Anil Mishra
BACKGROUND: Airway obstruction is a physiologic feature of asthma and IL-15 may have an important role in the pathogenesis of asthma. OBJECTIVE: We tested the hypothesis that regulation of IL-15 is critical for the preservation of allergen-induced airway hyperresponsiveness (AHR), airway resistance and compliance in response to methacholine. METHODS: Airway inflammation, AHR, resistance and compliance were assessed in IL-15- gene deficient mice and IL-15 overexpressing mice in an allergen-induced murine model of asthma...
June 9, 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28606156/expression-of-mrna-il-17f-and-sil-17f-in-atopic-asthma-patients
#7
Mochammad Hatta, Eko E Surachmanto, Andi Asadul Islam, Syarifuddin Wahid
BACKGROUND: Asthma is a chronic inflammatory disorder of airway that involves many cells and elements. Chronic inflammation caused by increase Airway hyperresponsiveness that cause recurrent episodic symptoms of breathlessness, wheezing, chest tightness and coughing, especially at night or early morning. Interleukin 17F is a cytokine that plays an important role in the pathophysiology of asthma attacks. Some studies show a variety of IL-17F roles in the pathogenesis of airway inflammation due to an allergic reaction...
June 12, 2017: BMC Research Notes
https://www.readbyqxmd.com/read/28601047/role-of-epigenetics-in-the-pathogenesis-of-asthma
#8
Zahra Alizadeh, Esmaeil Mortaz, Ian Adcock, Mostafa Moin
Asthma is a complex, heterogeneous and chronic airway inflammatory disease with different clinical phenotypes caused by diverse triggers and pathophysiological mechanisms. Asthma heritability has been established in many genetic studies but it is evident that only genetic elements are not responsible for the development of asthma. Increasing rate of asthma incidence during past decades has implicated the role of epigenetics in development of asthma. Environmental factors perform as initiator signals through epigenetic mechanisms...
April 2017: Iranian Journal of Allergy, Asthma, and Immunology
https://www.readbyqxmd.com/read/28599074/beyond-epithelial-to-mesenchymal-transition-common-suppression-of-differentiation-programs-underlies-epithelial-barrier-dysfunction-in-mild-moderate-and-severe-asthma
#9
Lucas F Loffredo, Hiam Abdala-Valencia, Kishore R Anekalla, Lyda Cuervo-Pardo, Cara J Gottardi, Sergejs Berdnikovs
BACKGROUND: Epithelial barrier dysfunction is a central feature in the pathogenesis of allergic disease. Epithelial-to-mesenchymal transition (EMT) has been proposed as one mechanism afflicting barrier in asthma. However, genes and pathways involved in aberrant epithelial-mesenchymal signaling, and their relationship to asthma severity, are poorly understood. METHODS: We used unbiased gene network analysis to evaluate functional convergence in epithelial gene expression signatures across multiple public access transcriptomics datasets of human asthma, followed by text mining to evaluate functional marker relevance of discovered genes...
June 9, 2017: Allergy
https://www.readbyqxmd.com/read/28596717/integration-of-metabolomic-and-transcriptomic-networks-in-pregnant-women-reveals-biological-pathways-and-predictive-signatures-associated-with-preeclampsia
#10
Rachel S Kelly, Damien C Croteau-Chonka, Amber Dahlin, Hooman Mirzakhani, Ann C Wu, Emily S Wan, Michael J McGeachie, Weiliang Qiu, Joanne E Sordillo, Amal Al-Garawi, Kathryn J Gray, Thomas F McElrath, Vincent J Carey, Clary B Clish, Augusto A Litonjua, Scott T Weiss, Jessica A Lasky-Su
INTRODUCTION: Preeclampsia is a leading cause of maternal and fetal mortality worldwide, yet its exact pathogenesis remains elusive. OBJECTIVES: This study, nested within the Vitamin D Antenatal Asthma Reduction Trial (VDAART), aimed to develop integrated omics models of preeclampsia that have utility in both prediction and in the elucidation of underlying biological mechanisms. METHODS: Metabolomic profiling was performed on first trimester plasma samples of 47 pregnant women from VDAART who subsequently developed preeclampsia and 62 controls with healthy pregnancies, using liquid-chromatography tandem mass-spectrometry...
January 2017: Metabolomics: Official Journal of the Metabolomic Society
https://www.readbyqxmd.com/read/28589151/advanced-role-of-neutrophils-in-common-respiratory-diseases
#11
REVIEW
Jinping Liu, Zhiqiang Pang, Guoqiang Wang, Xuewa Guan, Keyong Fang, Ziyan Wang, Fang Wang
Respiratory diseases, always being a threat towards the health of people all over the world, are most tightly associated with immune system. Neutrophils serve as an important component of immune defense barrier linking innate and adaptive immunity. They participate in the clearance of exogenous pathogens and endogenous cell debris and play an essential role in the pathogenesis of many respiratory diseases. However, the pathological mechanism of neutrophils remains complex and obscure. The traditional roles of neutrophils in severe asthma, chronic obstructive pulmonary diseases (COPD), pneumonia, lung cancer, pulmonary fibrosis, bronchitis, and bronchiolitis had already been reviewed...
2017: Journal of Immunology Research
https://www.readbyqxmd.com/read/28586774/the-use-of-mouse-asthma-models-to-successfully-discover-and-develop-novel-drugs
#12
Michelle M Epstein, Cornelia Tilp, Klaus J Erb
The past 20 years have seen a proliferation of scientific data on the pathophysiology of asthma. Most of these data were generated in mice using tool reagents, gene-deficient or transgenic animals. In contrast, studies on disease pathogenesis in patients are scarce. Previously, a good novel antiasthma target for drug development was one that abrogated asthma in mice when it was knocked out, neutralized or induced asthma when it was overexpressed. This type of approach led to many drug candidates that worked in mice but unfortunately failed in patients, thereby demonstrating that the results of experiments in mice are not always predictive of clinical efficacy...
June 7, 2017: International Archives of Allergy and Immunology
https://www.readbyqxmd.com/read/28586276/dendritic-cell-trafficking-and-function-in-rare-lung-diseases
#13
Huan Liu, Claudia Jakubzick, Andrew R Osterburg, Rebecca L Nelson, Nishant Gupta, Francis X McCormack, Michael T Borchers
Dendritic cells (DCs) are highly specialized immune cells that capture antigens and then migrate to lymphoid tissue and present antigen to T cells. This critical function of DCs is well defined and recent studies further demonstrate that DCs are also key regulators of several innate immune responses. Studies focused on the roles of DCs in the pathogenesis of common lung diseases such as asthma, infection and cancer have traditionally driven our mechanistic understanding of pulmonary DC biology. The emerging development of novel DC reagents, techniques and genetically modified animal models has provided abundant data revealing distinct populations of DCs in the lung and allow us to examine mechanisms of DC development, migration and function in pulmonary disease with unprecedented detail...
June 6, 2017: American Journal of Respiratory Cell and Molecular Biology
https://www.readbyqxmd.com/read/28584245/immune-signatures-of-pathogenesis-in-the-peritoneal-compartment-during-early-infection-of-sheep-with-fasciola-hepatica
#14
Maria Teresa Ruiz-Campillo, Veronica Molina Hernandez, Alejandro Escamilla, Michael Stevenson, Jose Perez, Alvaro Martinez-Moreno, Sheila Donnelly, John P Dalton, Krystyna Cwiklinski
Immune signatures of sheep acutely-infected with Fasciola hepatica, an important pathogen of livestock and humans were analysed within the peritoneal compartment to investigate early infection. Within the peritoneum, F. hepatica antibodies coincided with an intense innate and adaptive cellular immune response, with infiltrating leukocytes and a marked eosinophilia (49%). However, while cytokine qPCR analysis revealed IL-10, IL-12, IL-13, IL-23 and TGFβ were elevated, these were not statistically different at 18 days post-infection compared to uninfected animals indicating that the immune response is muted and not yet skewed to a Th2 type response that is associated with chronic disease...
June 5, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28583479/smoking-cessation-as-a-possible-risk-factor-for-the-development-of-aspirin-exacerbated-respiratory-disease-in-smokers
#15
Hiroaki Hayashi, Yuma Fukutomi, Chihiro Mitsui, Eiji Nakatani, Kentaro Watai, Yosuke Kamide, Kiyoshi Sekiya, Takahiro Tsuburai, Satoru Ito, Yoshinori Hasegawa, Masami Taniguchi
BACKGROUND: The pathogenesis of aspirin-exacerbated respiratory disease (AERD) is characterized by the low expression of cyclooxygenase-2 (COX-2) in airway epithelia, which decreases the production of prostaglandin E2 (PGE2). Conversely, cigarette smoke stimulates COX-2 expression in airway epithelia. Therefore, it was hypothesized that the development of AERD would be suppressed by elevated PGE2 levels in smokers, and smoking cessation might increase susceptibility to AERD. OBJECTIVE: The objective of this study was to evaluate the relationship between smoking and the risk of AERD development...
June 2, 2017: Journal of Allergy and Clinical Immunology in Practice
https://www.readbyqxmd.com/read/28579374/activated-plasmacytoid-dendritic-cells-regulate-type-2-innate-lymphoid-cells-mediated-airway-hyperreactivity
#16
Hadi Maazi, Homayon Banie, German Aleman, Nisheel Patel, Bowen Wang, Ishwarya Sankaranarayanan, Vipul Bhargava, Takahiro Sato, Gavin Lewis, Matteo Cesaroni, James Karras, Anuk Das, Pejman Soroosh, Omid Akbari
BACKGROUND: Allergic asthma is a prevalent inflammatory disease of the airways caused by dysregulated immune balance in the lungs with incompletely understood pathogenesis. The recently identified type 2 innate lymphoid cells (ILC2s) play significant roles in the pathogenesis of asthma. While ILC2-activating factors have been identified, the mechanisms that suppress ILC2s remain largely unknown. Plasmacytoid dendritic cells, pDCs, are important in antiviral immunity and in maintaining tolerance to inert antigens...
June 1, 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28560192/mutational-analysis-of-mitochondrial-trna-genes-in-patients-with-asthma
#17
Chun Mei Wang, Xiao Jing Zhang, Ying Jun Ma, Xia Li
BACKGROUND: Mitochondria are autonomous cellular organelles that oversee a variety of functions such as metabolism, energy production, calcium buffering, and cell fate determination. Most recently, mitochondrial dysfunction caused by mitochondrial mutations played important roles in the pathogenesis of asthma. However, the frequency of mitochondrial tRNA mutations in asthma is largely unknown. METHODS: Overall, 200 patients with asthma and 100 healthy control subjects were recruited between Jan 2015 and Dec 2015 at the Guangming New District People's Hospital, Shenzhen, Guangdong Province, China...
May 2017: Iranian Journal of Public Health
https://www.readbyqxmd.com/read/28559466/inhaled-drug-therapy-2016-the-year-in-review
#18
Rajiv Dhand
Some recent salient publications related to inhaled drug therapy are discussed. Unexpectedly, a 2.5-μg once-daily dose of tiotropium (Respimat) had greater efficacy than the 5.0-μg daily dose. Occurrence of a reverse dose response serves to caution us that administering more drug is not always beneficial. Small-airway inflammation contributes to pathogenesis of asthma, especially severe asthma. However, there is no conclusive evidence that the use of small-particle aerosols to target small airways improves clinical outcomes in controlled clinical trials...
May 30, 2017: Respiratory Care
https://www.readbyqxmd.com/read/28558721/extracellular-heat-shock-protein-90%C3%AE-mediates-hdm-induced-bronchial-epithelial-barrier-dysfunction-by-activating-rhoa-mlc-signaling
#19
Hang-Ming Dong, Yan-Qing Le, Yan-Hong Wang, Hai-Jin Zhao, Chao-Wen Huang, Ya-Hui Hu, Li-Shan Luo, Xuan Wan, Yi-Lan Wei, Zi-Qiang Chu, Wei Li, Shao-Xi Cai
BACKGROUND: The disruption and hyperpermeability of bronchial epithelial barrier are closely related to the pathogenesis of asthma. House dust mite (HDM), one of the most important allergens, could increase the airway epithelial permeability. Heat shock protein (Hsp) 90α is also implicated in the lung endothelial barrier dysfunction by disrupting RhoA signaling. However, the effect of extracellular Hsp90α (eHsp90α) on the bronchial epithelial barrier disruption induced by HDM has never been reported...
May 30, 2017: Respiratory Research
https://www.readbyqxmd.com/read/28555328/evolving-concepts-in-atopic-dermatitis
#20
REVIEW
Robert Sidbury, Kate Khorsand
PURPOSE OF REVIEW: Tremendous advances have been made in the field of atopic dermatitis in the past 5 years. We will explore developments in burden of disease, co-morbidities, pathogenesis, prevention, and management. RECENT FINDINGS: The tremendous burden moderate to severe atopic dermatitis (AD) places on families from a medical, psychosocial, and financial perspective has been characterized. Epidemiologic studies have identified intriguing new associations beyond the well-characterized "atopic march" of food allergies, asthma, and hay fever...
July 2017: Current Allergy and Asthma Reports
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