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Treatment Resistent Asthma

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https://www.readbyqxmd.com/read/29332324/effects-of-macrolide-and-corticosteroid-in-neutrophilic-asthma-mouse-model
#1
Tai Joon An, Chin Kook Rhee, Ji Hye Kim, Young Rong Lee, Jin Young Chon, Chan Kwon Park, Hyoung Kyu Yoon
BACKGROUND: Asthma is a disease of chronic airway inflammation with heterogeneous features. Neutrophilic asthma is corticosteroid-insensitive asthma related to absence or suppression of TH2 process and increased TH1 and/or TH17 process. Macrolides are immunomodulatory drug that reduce airway inflammation, but their role in asthma is not fully known. The purpose of this study was to evaluate the role of macrolides in neutrophilic asthma and compare their effects with those of corticosteroids...
January 2018: Tuberculosis and Respiratory Diseases
https://www.readbyqxmd.com/read/29332144/long-acting-%C3%AE-2-agonists-in-asthma-enantioselective-safety-studies-are-needed
#2
Glenn A Jacobson, Sharanne Raidal, Morten Hostrup, Luigino Calzetta, Richard Wood-Baker, Mark O Farber, Clive P Page, E Haydn Walters
Long-acting β2-agonists (LABAs) such as formoterol and salmeterol are used for prolonged bronchodilatation in asthma, usually in combination with inhaled corticosteroids (ICSs). Unexplained paradoxical asthma exacerbations and deaths have been associated with LABAs, particularly when used without ICS. LABAs clearly demonstrate effective bronchodilatation and steroid-sparing activity, but long-term treatment can lead to tolerance of their bronchodilator effects. There are also concerns with regard to the effects of LABAs on bronchial hyperresponsiveness (BHR), where long-term use is associated with increased BHR and loss of bronchoprotection...
January 13, 2018: Drug Safety: An International Journal of Medical Toxicology and Drug Experience
https://www.readbyqxmd.com/read/29332017/insulin-resistance-and-lung-function-in-obese-asthmatic-pre-pubertal-children
#3
Paola Di Filippo, Alessandra Scaparrotta, Daniele Rapino, Tommaso de Giorgis, Marianna Immacolata Petrosino, Marina Attanasi, Sabrina Di Pillo, Francesco Chiarelli, Angelika Mohn
BACKGROUND: Recent findings have supposed that the underlying association between the increased prevalence of both asthma and obesity may be insulin resistance (IR). METHODS: Insulin and glucose serum levels were analyzed to calculate the homeostatic model assessment of insulin resistance (HOMA-IR) for IR in 98 pre-pubertal children. Lung function and allergy status evaluation were performed. The study population was divided into four groups: (1) obese asthmatic children (ObA); (2) normal-weight asthmatic children (NwA); (3) normal-weight non-asthmatic children (Nw) and (4) obese non-asthmatic children (Ob)...
January 26, 2018: Journal of Pediatric Endocrinology & Metabolism: JPEM
https://www.readbyqxmd.com/read/29323699/leukotriene-b4-receptor-2-regulates-the-proliferation-migration-and-barrier-integrity-of-bronchial-epithelial-cells
#4
Min Liu, Juan Shen, Huimin Yuan, Fengling Chen, Huaidong Song, Hui Qin, Yanqin Li, Jiabo Xu, Qing Ye, Shenxian Li, Kazuko Saeki, Takehiko Yokomizo
The airway epithelium plays a crucial role in the pathogenesis of asthma. The functions of leukotriene B4 receptor 2 (BLT2) on the airway epithelial cells remains unknown. In our study, BLT2 expression in 16HBE bronchial epithelial cells were manipulated by transfection with BLT2 overexpression plasmid or BLT2 small interference RNA. 16HBE cells were then exposed to BLT2 antagonist (LY255283) or BLT2 agonist (12(S)-hydroxyheptadeca-5Z,8E,10E-trienoic acid [12-HHT] or CAY10583). The results showed that BLT2 overexpression, 12-HHT stimulation or CAY10583 treatment resulted in the enhanced proliferation and migration of 16HBE cells...
January 11, 2018: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/29313715/fluid-balance-is-associated-with-clinical-outcomes-and-extravascular-lung-water-in-children-with-acute-asthma-exacerbation
#5
David B Kantor, Eliotte L Hirshberg, Molly C McDonald, Jonathan Griffin, Tess Buccigrosso, Nicole Stenquist, Craig D Smallwood, Kyle A Nelson, David Zurakowski, Wanda Phipatanakul, Joel N Hirschhorn
RATIONALE: The effects of fluid administration during acute asthma exacerbation are likely unique in this patient population: highly negative inspiratory intrapleural pressure resulting from increased airway resistance may interact with excess fluid administration to favor the accumulation of extravascular lung water, leading to worse clinical outcomes. OBJECTIVES: Investigate how fluid balance influences clinical outcomes in children hospitalized for asthma exacerbation...
January 9, 2018: American Journal of Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/29313707/sputum-eosinophilia-and-mri-ventilation-heterogeneity-in-severe-asthma
#6
Sarah Svenningsen, Rachel L Eddy, Hui Fang Lim, P Gerard Cox, Parameswaran Nair, Grace Parraga
RATIONALE: Inflammation and smooth muscle dysfunction are integral components of severe asthma that contribute to luminal obstruction causing airflow limitation, ventilation heterogeneity and symptoms. This is important for guiding treatment decisions directed at inflammatory (eg. anti-Th2 monoclonal antibodies) and non-inflammatory, smooth muscle-mediated (eg. bronchial thermoplasty) components of severe asthma. OBJECTIVE: To investigate the contribution of eosinophilic-bronchitis and smooth muscle dysfunction to magnetic-resonance-imaging (MRI) ventilation heterogeneity in severe asthmatics...
January 9, 2018: American Journal of Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/29288933/targeting-the-renin-angiotensin-system-as-novel-therapeutic-strategy-for-pulmonary-diseases
#7
REVIEW
Wan Shun Daniel Tan, Wupeng Liao, Shuo Zhou, Dan Mei, Wai-Shiu Fred Wong
The renin-angiotensin system (RAS) plays a major role in regulating electrolyte balance and blood pressure. RAS has also been implicated in the regulation of inflammation, proliferation and fibrosis in pulmonary diseases such as asthma, acute lung injury (ALI), chronic obstructive pulmonary disease (COPD), idiopathic pulmonary fibrosis (IPF) and pulmonary arterial hypertension (PAH). Current therapeutics suffer from some drawbacks like steroid resistance, limited efficacies and side effects. Novel intervention is definitely needed to offer optimal therapeutic strategy and clinical outcome...
December 27, 2017: Current Opinion in Pharmacology
https://www.readbyqxmd.com/read/29284473/involvements-of-p38-mapk-and-oxidative-stress-in-the-ozone-induced-enhancement-of-ahr-and-pulmonary-inflammation-in-an-allergic-asthma-model
#8
Aihua Bao, Hong Yang, Jie Ji, Yuqin Chen, Wuping Bao, Feng Li, Min Zhang, Xin Zhou, Qiang Li, Suqin Ben
BACKGROUND: Exposure to ambient ozone (O3) increases the susceptivity to allergens and triggers exacerbations in patients with asthma. However, the detailed mechanisms of action for O3 to trigger asthma exacerbations are still unclear. METHODS: An ovalbumin (OVA)-established asthmatic mouse model was selected to expose to filtered air (OVA-model) or 1.0 ppm O3 (OVA-O3 model) during the process of OVA challenge. Next, the possible involvements of p38 MAPK and oxidative stress in the ozone actions on the asthma exacerbations were investigated on the mice of OVA-O3 model by treating them with SB239063 (a p38 MAPK inhibitor), and/or the α-tocopherol (antioxidant)...
December 29, 2017: Respiratory Research
https://www.readbyqxmd.com/read/29232988/does-antibiotic-treatment-duration-affect-the-outcomes-of-exacerbations-of-asthma-and-copd-a-systematic-review
#9
Marie Stolbrink, Jack Amiry, John D Blakey
Asthma and chronic obstructive pulmonary disease (COPD) cause significant morbidity and mortality worldwide, primarily through exacerbations. Exacerbations are often treated with antibiotics but their optimal course duration is uncertain. Reducing antibiotic duration may influence antimicrobial resistance but risks treatment failure. The objective of this article is to review published literature to investigate whether shorter antibiotic therapy duration affects clinical outcomes in the treatment of asthma and COPD exacerbations...
January 1, 2017: Chronic Respiratory Disease
https://www.readbyqxmd.com/read/29225146/microbial-diversity-within-the-airway-microbiome-in-chronic-pediatric-lung-diseases
#10
Andrea Hahn, Stephanie Warnken, Marcos Pérez-Losada, Robert J Freishtat, Keith A Crandall
The study of the airway microbiome in children is an area of emerging research, especially in relation to the role microbial diversity may play in acute and chronic inflammation. Three such pediatric airway diseases include cystic fibrosis, asthma, and chronic lung disease of prematurity. In cystic fibrosis, the presence of Pseudomonas spp. is associated with decreased microbial diversity. Decreasing microbial diversity is also associated with poor lung function. In asthma, early viral infections appear to drive changes in bacterial diversity which may be associated with asthma risk...
December 7, 2017: Infection, Genetics and Evolution
https://www.readbyqxmd.com/read/29220719/house-dust-mite-allergen-causes-certain-features-of-steroid-resistant-asthma-in-high-fat-fed-obese-mice
#11
Vijay Pal Singh, Ulaganathan Mabalirajan, Kunal Pratap, Devika Bahal, Deepanshu Maheswari, Atish Gheware, Aabha Bajaj, Lipsa Panda, Ashish Jaiswal, Arjun Ram, Anurag Agrawal
Obesity is a high risk factor for diseases such as cardiovascular, metabolic syndrome and asthma. Obese-asthma is another emerging phenotype in asthma which is typically refractive to steroid treatment due to its non-classical features such as non-eosinophilic cellular inflammation. The overall increased morbidity, mortality and economical burden in asthma is mainly due to steroid resistant asthma. In the present study, we used high fat diet induced obese mice which when sensitized with house dust mite (HDM) showed steroid resistant features...
December 4, 2017: International Immunopharmacology
https://www.readbyqxmd.com/read/29202404/discovery-of-a-novel-series-of-%C3%AE-terpineol-derivatives-as-promising-anti-asthmatic-agents-their-design-synthesis-and-biological-evaluation
#12
Wanping Zhu, Xia Liu, Yuji Wang, Yeling Tong, Yongzhou Hu
A series of novel α-terpineol derivatives were designed and synthesized through structural derivatization of the tertiary hydroxyl moiety or reduction of the double bond. Of the resulting compounds, eight compounds enhanced relaxation of airway smooth muscle (ASM) compared to the α-terpineol precursor, and four compounds (4a, 4d, 4e, and 4i)were superior or comparable to aminophylline at a concentration of 0.75 mmol/L. Assays for 3'-5'-Cyclic adenosine monophpsphate (cAMP) activation revealed that some representative α-terpineol derivatives in this series were capable of upregulating the level of cAMP in ASM cells...
August 1, 2017: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/29176481/the-asthma-obesity-relationship-underlying-mechanisms-and-treatment-implications
#13
Orestes A Carpaij, Maarten van den Berge
PURPOSE OF REVIEW: Obesity is a worldwide epidemic with a prevalence that has tripled in the last two decades. Worldwide, more than 1.5 billion adults are overweight and more than 500 million obese. Obesity has been suggested to be a risk factor for the development of more difficult-to-control asthma. Although the mechanisms underlying the asthma-obesity relationship are not fully understood, several possible explanations have been put forward. These will be reviewed in this manuscript as well as the implications for the treatment of overweight and obese asthma patients...
January 2018: Current Opinion in Pulmonary Medicine
https://www.readbyqxmd.com/read/29159029/case-report-unusual-cause-of-difficulty-in-intubation-and-ventilation-with-asthmatic-like-presentation-of-endobronchial-tuberculosis
#14
S Praveena Seevaunnamtum, Nazhan Afeef Mohd Ariff Ghazali, Wan Mohd Nazaruddin, Alwi Muhd Besari, N H Nik Fariza, Sanihah Che Omar, Saedah Ali, M Z Rhendra Hardy, Mohd Erham Mat Hassan, N M Nik Abdullah
Endobronchial Tuberculosis is hazardous in causing circumferential narrowing of tracheobronchial tree despite the eradication of tubercle bacilli in the initial insult from Pulmonary Tuberculosis. They may present as treatment resistant bronchial asthma and pose challenge to airway management in the acute setting. We present a 25 year-old lady who was newly diagnosed bronchial asthma with a past history of Pulmonary Tuberculosis that had completed treatment. She presented with sudden onset of difficulty breathing associated with noisy breathing for 3 days and hoarseness of voice for 6 months...
2017: Respiratory Medicine Case Reports
https://www.readbyqxmd.com/read/29158087/fabp4-induces-asthmatic-airway-epithelial-barrier-dysfunction-via-ros-activated-foxm1
#15
Gaohui Wu, Liteng Yang, Yi Xu, Xiaohong Jiang, Xiaomin Jiang, Lisha Huang, Ling Mao, Shaoxi Cai
Functional abnormal airway epithelial cells, along with activated inflammatory cells, resulting in chronic airway inflammation, are considered as the characteristic of asthma. Fatty Acid Binding Protein 4 (FABP4) takes part in glucose and lipid homeostasis, and also have an important role in allergic airway inflammation. However, whether FABP4 influence barrier function of airway epithelial cells is unknown. In vivo, a HDM-induced murine model of asthma was obtained to assessed airway inflammation and protein expression of E-cadherin and Forkhead Box M1 (FoxM1)...
November 17, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29152899/lung-function-after-extremely-preterm-birth-a-population-based-cohort-study-express
#16
Per Thunqvist, Ellen Tufvesson, Leif Bjermer, Anna Winberg, Vineta Fellman, Magnus Domellöf, Erik Melén, Mikael Norman, Jenny Hallberg
BACKGROUND AND OBJECTIVES: Follow-up studies of children and young adults born very-to-moderately preterm show persistent and significant lung function deficits. The aim of the study was to determine lung function and airway mechanics in school-aged children born in 2004 to 2007 and extremely preterm (after 22-26 weeks of gestation). METHODS: In a population-based cohort of children born extremely preterm and controls born at term (n = 350), follow-up at 6½-years-of-age was performed using spirometry and impulse oscillometry...
November 20, 2017: Pediatric Pulmonology
https://www.readbyqxmd.com/read/29130617/dendritic-cell-phenotype-in-severe-asthma-reflects-clinical-responsiveness-to-glucocorticoids
#17
Emma S Chambers, Alexandra M Nanzer, Paul E Pfeffer, David F Richards, Adrian R Martineau, Christopher J Griffiths, Christopher J Corrigan, Catherine M Hawrylowicz
BACKGROUND: Subsets of patients with severe asthma remain symptomatic despite prolonged, high dosage glucocorticoid therapy. We hypothesised that the clinical glucocorticoid sensitivity of these asthmatics is reflected in differences in peripheral blood dendritic cell subsets. OBJECTIVE: To compare peripheral blood leukocyte populations using flow cytometry at baseline and after 2 weeks of systemic glucocorticoid (steroid) treatment to identify immunological differences between steroid sensitive (SS) and steroid resistant (SR) asthmatics...
November 11, 2017: Clinical and Experimental Allergy: Journal of the British Society for Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/29124506/heart-rate-variability-biofeedback-does-not-substitute-for-asthma-steroid-controller-medication
#18
Paul M Lehrer, Charles G Irvin, Shou-En Lu, Anthony Scardella, Beatrix Roehmheld-Hamm, Milisyaris Aviles-Velez, Jessica Graves, Evgeny G Vaschillo, Bronya Vaschillo, Flavia Hoyte, Harold Nelson, Frederick S Wamboldt
Despite previous findings of therapeutic effects for heart rate variability biofeedback (HRVB) on asthma, it is not known whether HRVB can substitute either for controller or rescue medication, or whether it affects airway inflammation. Sixty-eight paid volunteer steroid naïve study participants with mild or moderate asthma were given 3 months of HRVB or a comparison condition consisting of EEG alpha biofeedback with relaxing music and relaxed paced breathing (EEG+), in a two-center trial. All participants received a month of intensive asthma education prior to randomization...
November 9, 2017: Applied Psychophysiology and Biofeedback
https://www.readbyqxmd.com/read/29116046/radon-enriched-hot-spring-water-therapy-for-upper-and-lower-respiratory-tract-inflammation
#19
Desiderio Passali, Giacomo Gabelli, Giulio Cesare Passali, Ralph Mösges, Luisa Maria Bellussi
Background Radon-222-enriched hot spring therapy, which is characterized by a safe level of radioactivity, is used for the treatment of rheumatic disorders, and its efficacy has already been studied in several clinical trials. Radon-water inhalation therapy for the treatment of upper and lower airway inflammatory diseases is used in many hot springs centers. However, its application has not been reviewed to date. Methods We systematically searched the PubMed and Scopus databases for clinical trials published in the last 20 years in which objective parameters of upper and lower airway function had been tested before and after radon-enriched inhalation treatment...
August 31, 2017: Otolaryngologia Polska
https://www.readbyqxmd.com/read/29106996/chronic-rhinosinusitis-endotypes-biomarkers-and-treatment-response
#20
Jose Gurrola, Larry Borish
It is increasingly recognized that chronic rhinosinusitis (CRS) comprises a spectrum of different diseases with distinct clinical presentations and pathogenic mechanisms. Defining the distinct phenotypes and endotypes of CRS impacts prognosis and most importantly is necessary as the basis for making therapeutic decisions. The need for individualized defining of pathogenic mechanisms prior to initiating therapy extends to virtually all therapeutic considerations. This is clearly crucial with antibiotics where, barring an influence from their off-target anti-inflammatory pharmacological effects, an understanding of the role of individual biome predicts likelihood of therapeutic benefit...
October 26, 2017: Journal of Allergy and Clinical Immunology
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