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Sputum eosinophil

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https://www.readbyqxmd.com/read/29154772/endogenous-peroxidases-in-sputum-interfere-with-horse-radish-peroxidase-based-elisas
#1
Lisa Ha-Yeon Kim, Karin Plaza, Sruthi R Thomas, Christina Draijer, Katherine Radford, Marc Peters-Golden, Manali Mukherjee, Parameswaran Nair
Peroxidase-based immunoassays are commonly used for detecting inflammatory mediators in biological samples. We suggest caution while interpreting assays particularly in sputum samples that have endogenous peroxidases like eosinophil peroxidase (EPX), which may interact with a horseradish peroxidase (HRP)-based ELISA. Using IL-8 as an example, we demonstrate that values generated with an HRP-ELISA (n=47) show significant positive correlation with the sputum EPX content (r=0.6, P=0.0004), which can be misconstrued to be affiliated with an eosinophilic event...
November 14, 2017: Journal of Immunological Methods
https://www.readbyqxmd.com/read/29150070/decreased-expression-of-indolamine-2-3-dioxygenase-in-childhood-allergic-asthma-and-its-inverse-correlation-with-fractional-concentration-of-exhaled-nitric-oxide
#2
Ying Hu, Zhiqiang Chen, Ling Jin, Mei Wang, Wei Liao
BACKGROUND: The tryptophan metabolic pathway mediated by indolamine 2,3-dioxygenase (IDO), a tryptophan-degrading enzyme, plays an important role in controlling the development of allergic inflammation. The fractional concentration of exhaled nitric oxide (FeNO) is closely associated with the allergic state and is extensively used for the clinical evaluation of airway allergic inflammation. Clinical trials have rarely assessed the expression of IDO in childhood allergic asthma and its correlation with FeNO...
November 2017: Annals of Allergy, Asthma & Immunology
https://www.readbyqxmd.com/read/29146301/association-of-sputum-and-blood-eosinophil-concentrations-with-clinical-measures-of-copd-severity-an-analysis-of-the-spiromics-cohort
#3
Annette T Hastie, Fernando J Martinez, Jeffrey L Curtis, Claire M Doerschuk, Nadia N Hansel, Stephanie Christenson, Nirupama Putcha, Victor E Ortega, Xingnan Li, R Graham Barr, Elizabeth E Carretta, David J Couper, Christopher B Cooper, Eric A Hoffman, Richard E Kanner, Eric Kleerup, Wanda K O'Neal, Richard Paine, Stephen P Peters, Neil E Alexis, Prescott G Woodruff, MeiLan K Han, Deborah A Meyers, Eugene R Bleecker
BACKGROUND: Increased concentrations of eosinophils in blood and sputum in chronic obstructive pulmonary disease (COPD) have been associated with increased frequency of exacerbations, reduced lung function, and corticosteroid responsiveness. We aimed to assess whether high eosinophil concentrations in either sputum or blood are associated with a severe COPD phenotype, including greater exacerbation frequency, and whether blood eosinophils are predictive of sputum eosinophils. METHODS: We did a multicentre observational study analysing comprehensive baseline data from SPIROMICS in patients with COPD aged 40-80 years who had a smoking history of at least 20 pack-years, recruited from six clinical sites and additional subsites in the USA between Nov 12, 2010, and April 21, 2015...
November 13, 2017: Lancet Respiratory Medicine
https://www.readbyqxmd.com/read/29137638/virus-triggered-exacerbation-in-allergic-asthmatic-children-neutrophilic-airway-inflammation-and-alteration-of-virus-sensors-characterize-a-subgroup-of-patients
#4
Antoine Deschildre, Muriel Pichavant, Ilka Engelmann, Carole Langlois, Elodie Drumez, Guillaume Pouessel, Sophie Boileau, David Romero-Cubero, Irina Decleyre-Badiu, Anny Dewilde, Didier Hober, Véronique Néve, Caroline Thumerelle, Stéphanie Lejeune, Clémence Mordacq, Philippe Gosset
BACKGROUND: Viruses are important triggers of asthma exacerbations. They are also detected outside of exacerbation. Alteration of anti-viral response in asthmatic patients has been shown although the mechanisms responsible for this defect remain unclear. The objective of this study was to compare in virus-infected and not-infected allergic asthmatic children, aged 6 to 16 years, admitted to hospital for a severe exacerbation, the innate immune response and especially the expression of pattern recognition receptor (PRR) and their function...
November 14, 2017: Respiratory Research
https://www.readbyqxmd.com/read/29103994/sputum-cell-interleukin-1-receptor-expression-level-is-a-marker-of-airway-neutrophilia-and-airflow-obstruction-in-asthma
#5
Michael D Evans, Stephane Esnault, Loren C Denlinger, Nizar N Jarjour
BACKGROUND: Various clinical, biologic or physiologic markers of asthma have been used to identify patient clusters and potential targets for therapy. However, these identifiers frequently overlap among the different asthma groups. For instance, both eosinophils and neutrophils are often increased in the airway of asthma patients despite their typical association with type-2 and type-17 immune response, respectively. OBJECTIVES: To determine whether inflammatory gene expressions are related to patterns of airway inflammation and lung function, and identify molecular markers for neutrophilic asthma...
November 2, 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/29099646/emphysematous-phenotype-is-characterized-by-low-blood-eosinophils-a-cross-sectional-study
#6
Andriana I Papaioannou, Konstantinos Kostikas, Anastasia Papaporfyriou, Leonidas Angelakis, Evgenia Papathanasiou, Georgios Hillas, Argyro Mazioti, Petros Bakakos, Nikolaos Koulouris, Spyros Papiris, Stelios Loukides
Sputum and blood eosinophils are proposed as candidate biomarkers for the identification of chronic obstructive pulmonary disease (COPD) patients at risk for exacerbation and treatment response. In this study, we evaluated the associations of eosinophils with the presence of emphysema in COPD patients. Induced sputum and blood eosinophil measurements were performed in consecutive COPD patients. Patients underwent lung function testing and high resolution computed tomography (HRCT) of the chest and the presence of emphysema was quantified...
November 3, 2017: COPD
https://www.readbyqxmd.com/read/29068159/sputum-tweak-expression-correlates-with-severity-and-degree-of-control-in-noneosinophilic-childhood-asthma
#7
Soo Yeon Kim, Jong Deok Kim, In Suk Sol, Min Jung Kim, Mi Na Kim, Jung Yeon Hong, Hye Ran Kim, Yoon Hee Kim, Yong Ju Lee, Kyung Won Kim, Myung Hyun Sohn
BACKGROUND: Tumor necrosis factor-like weak inducer of apoptosis (TWEAK) is known to play a role in the pathogenesis of various inflammatory diseases. However, no study has been performed on childhood asthma. METHODS: Ninety-five children with asthma and 78 controls aged 5-18 years were included. Sputum induction, pulmonary function test (PFT), and methacholine challenge test were performed. The subjects were divided into the eosinophilic airway (EA) and non-EA (NEA) groups based on sputum analysis and into the high and low TWEAK groups according to the TWEAK cutoff level (263...
October 25, 2017: Pediatric Allergy and Immunology
https://www.readbyqxmd.com/read/29066290/phenotype-classification-using-the-combination-of-lung-sound-analysis-and-fractional-exhaled-nitric-oxide-for-evaluating-asthma-treatment
#8
Terufumi Shimoda, Yasushi Obase, Yukio Nagasaka, Sadahiro Asai
BACKGROUND: We report the utility of combining lung sound analysis and fractional exhaled nitric oxide (FeNO) for phenotype classification of airway inflammation in patients with bronchial asthma. We investigated the usefulness of the combination of the expiration-to-inspiration sound power ratio in the mid-frequency range (E/I MF) of 200-400 Hz and FeNO for comprehensively classifying disease type and evaluating asthma treatment. METHODS: A total of 233 patients with bronchial asthma were included...
October 21, 2017: Allergology International: Official Journal of the Japanese Society of Allergology
https://www.readbyqxmd.com/read/29033414/spontaneous-regression-of-allergic-bronchopulmonary-mycosis-due-to-curvularia-lunata
#9
Shingo Nasu, Shingo Satoh, Kazunori Shimizu, Osamu Matsuno, Hiroshi Morishita, Takashi Yaguchi, Kunimitsu Kawahara, Hiroto Matsuoka
Allergic bronchopulmonary mycosis (ABPM) is a pulmonary hypersensitivity disease mainly caused by Aspergillus fumigatus. The mainstay treatment for ABPM is systemic corticosteroid therapy. A 25-year-old man presented with pulmonary infiltrates. His peripheral eosinophil, total serum IgE, and serum Aspergillus-specific IgE levels were elevated. The patient tested positive in a skin test for Aspergillus. However, sputum cultures revealed a Curvularia lunata infection. We therefore diagnosed ABPM possibly caused by C...
October 16, 2017: Internal Medicine
https://www.readbyqxmd.com/read/29027380/different-expression-about-induced-sputum-cell-sorting-in-the-two-main-types-of-chronic-obstructive-pulmonary-disease
#10
Huifang Song, Chunmei Yun, Maoye Xu, Dejun Sun
BACKGROUND: The difference in expression of sputum cells types between the two main types of chronic obstructive pulmonary disease (COPD) is largely unknown. This study aims to investigate the difference and then wants to depend on sputum cells sorting to direct the treatment of COPD. METHODS: A total of 218 patients with stable COPD (FEV1 < 80%) were selected. Stable COPD patients (n = 218) were classified as eosinophilic (A phenotype) or noneosinophilic (B phenotype); sometimes, the subjects were separated into cough group (C phenotype) and dyspnea group (D phenotype)...
December 2017: Diagnostic Cytopathology
https://www.readbyqxmd.com/read/29025891/impact-and-associations-of-eosinophilic-inflammation-in-copd-analysis-of-the-aeris-cohort
#11
Viktoriya L Kim, Ngaire A Coombs, Karl J Staples, Kristoffer K Ostridge, Nicholas P Williams, Stephen A Wootton, Jeanne-Marie Devaster, Emmanuel Aris, Stuart C Clarke, Andrew C Tuck, Simon C Bourne, Tom M A Wilkinson
Eosinophilic inflammation in chronic obstructive pulmonary disease (COPD) predicts response to treatment, especially corticosteroids. We studied the nature of eosinophilic inflammation in COPD prospectively to examine the stability of this phenotype and its dynamics across exacerbations, and its associations with clinical phenotype, exacerbations and infection.127 patients aged 40-85 years with moderate to very severe COPD underwent repeated blood and sputum sampling at stable visits and within 72 h of exacerbation for 1 year...
October 2017: European Respiratory Journal: Official Journal of the European Society for Clinical Respiratory Physiology
https://www.readbyqxmd.com/read/29018800/asthma-endotypes-and-an-overview-of-targeted-therapy-for-asthma
#12
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/28986203/inhaled-nebulised-unfractionated-heparin-improves-lung-function-in-moderate-to-very-severe-copd-a-pilot-study
#13
Janis K Shute, Luigino Calzetta, Vittorio Cardaci, Stefania di Toro, Clive P Page, Mario Cazzola
BACKGROUND: COPD is an inflammatory airway disease characterised by progressive airflow limitation and air trapping, leading to lung hyperinflation and exercise limitation. Acute worsening of symptoms, including dyspnea, cough and sputum production, occurs during exacerbations which are associated with significantly reduced health related quality of life, and increased morbidity and mortality. Chronic bronchial mucus production and productive cough are risk factors for exacerbations. Medicines targeting bronchoconstriction and airway inflammation are the current mainstays of COPD therapy...
October 3, 2017: Pulmonary Pharmacology & Therapeutics
https://www.readbyqxmd.com/read/28982774/long-term-effects-of-inhaled-corticosteroids-on-sputum-bacterial-and-viral-loads-in-copd
#14
Marco Contoli, Alessia Pauletti, Maria Rita Rossi, Antonio Spanevello, Paolo Casolari, Andrea Marcellini, Giacomo Forini, Giulia Gnesini, Brunilda Marku, Neil Barnes, Andrea Rizzi, Giacomo Curradi, Gaetano Caramori, Paolo Morelli, Alberto Papi
Inhaled corticosteroid-containing medications reduce the frequency of COPD exacerbations (mainly infectious in origin) while paradoxically increasing the risk of other respiratory infections. The aim was to determine the effects of inhaled corticosteroids on airway microbial load in COPD patients and evaluate the influence of the underlying inflammatory profile on airway colonisation and microbiome.This is a proof-of-concept prospective, randomised, open-label, blinded endpoint study. Sixty patients with stable moderate COPD were randomised to receive one inhalation twice daily of either a combination of salmeterol 50 μg plus fluticasone propionate 500 μg or salmeterol 50 μg for 12 months...
October 2017: European Respiratory Journal: Official Journal of the European Society for Clinical Respiratory Physiology
https://www.readbyqxmd.com/read/28977288/tests-to-assess-sensitization-to-aspergillus-fumigatus-in-cystic-fibrosis
#15
Simone Santana Aguiar, Neiva Damaceno, Wilma Carvalho Neves Forte
OBJECTIVE: To evaluate the results of the tests used to identify the IgE mediated sensitization to Aspergillus fumigatus in patients with cystic fibrosis. METHODS: This is a cross-sectional descriptive study with a convenience sample of 86 patients diagnosed with cystic fibrosis in the Reference Service in Cystic Fibrosis at a tertiary teaching hospital. The following tests were performed to assess the sensitization to A. fumigatus in patients with cystic fibrosis: Total serum IgE, eosinophil count, fungus detection through oropharyngeal swab or sputum culture, serum-specific IgE, and immediate-type hypersensitivity (IgE) skin tests...
July 2017: Revista Paulista de Pediatria: Orgão Oficial da Sociedade de Pediatria de São Paulo
https://www.readbyqxmd.com/read/28965921/therapeutic-approaches-of-asthma-and-copd-overlap
#16
REVIEW
Mitsuko Kondo, Jun Tamaoki
Asthma and COPD overlap (ACO) is an important clinical phenotype, due to the low-health-related quality of life (QOL), rapid decline in lung function, frequent exacerbation, and high economic burden. However, no large-scaled therapeutic trials of ACO have been conducted. At present, ACO is treated according to asthma/COPD guidelines. The goals of ACO treatment are to relieve symptoms and improve QOL and lung functions. Treatment must also prevent disease progression, airway remodeling, exacerbation, complications, and comorbidities...
September 28, 2017: Allergology International: Official Journal of the Japanese Society of Allergology
https://www.readbyqxmd.com/read/28954779/transcriptomic-gene-signatures-associated-with-persistent-airflow-limitation-in-patients-with-severe-asthma
#17
Pieter-Paul Hekking, Matthew J Loza, Stelios Pavlidis, Bertrand De Meulder, Diane Lefaudeux, Frederic Baribaud, Charles Auffray, Ariane H Wagener, Paul Brinkman, René Lutter, Aruna T Bansal, Ana R Sousa, Stewart A Bates, Ioannis Pandis, Louise J Fleming, Dominick E Shaw, Stephen J Fowler, Yike Guo, Andrea Meiser, Kai Sun, Julie Corfield, Peter Howarth, Elisabeth H Bel, Ian M Adcock, Kian Fan Chung, Ratko Djukanovic, Peter J Sterk
A proportion of severe asthma patients suffers from persistent airflow limitation (PAL), often associated with more symptoms and exacerbations. Little is known about the underlying mechanisms. Here, our aim was to discover unexplored potential mechanisms using Gene Set Variation Analysis (GSVA), a sensitive technique that can detect underlying pathways in heterogeneous samples.Severe asthma patients from the U-BIOPRED cohort with PAL (post-bronchodilator forced expiratory volume in 1 s/forced vital capacity ratio below the lower limit of normal) were compared with those without PAL...
September 2017: European Respiratory Journal: Official Journal of the European Society for Clinical Respiratory Physiology
https://www.readbyqxmd.com/read/28947029/sputum-microbiota-in-severe-asthma-patients-relationship-to-eosinophilic-inflammation
#18
Naijian Li, Rihuang Qiu, Zhaowei Yang, Jing Li, Kian Fan Chung, Nanshan Zhong, Qingling Zhang
BACKGROUND: Altered composition of airway microbiota has been reported in subjects suffering from asthma but its relation to eosinophilic phenotype is unclear. OBJECTIVE: To examine the relationship between sputum microbiota, asthma severity and inflammatory type in asthmatic subjects from Guangzhou, China. METHODS: Induced sputum samples were obtained from 49 non-smoking asthma patients, 25 severe and 24 non-severe, and 15 healthy subjects...
October 2017: Respiratory Medicine
https://www.readbyqxmd.com/read/28941741/comparative-clinical-physiological-and-inflammatory-characteristics-of-elderly-subjects-with-or-without-asthma-and-young-subjects-with-asthma
#19
Louis-Philippe Boulet, Catherine Robitaille, Francine Deschesnes, Hélène Villeneuve, Marie-Ève Boulay
BACKGROUND: Asthma seems to present in the elderly as a specific phenotype that remains to be further described. In this prospective observational study, we aimed to assess the multidimensional aspects of asthma in the elderly. METHODS: In young (18 to 35 years old) subjects with mild to moderate asthma and elderly subjects (aged ≥60 years) either with or without mild to moderate asthma, we compared asthma control, health care and medication use, lung function, markers of airway and systemic inflammation, and adherence to therapy...
September 20, 2017: Chest
https://www.readbyqxmd.com/read/28929787/-phenotypes-of-bronchial-asthma
#20
László Béla Nagy
It is increasingly recognized that the bronchial asthma is a heterogeneous entity, encompassing a variety of different phenotypes. The identification of specific phenotypes is the key to develop more effective personalised treatment. The earliest attempt to phenotype asthma was proposed classifying into extrinsic and intrinsic subtypes. Clinical asthma is mainly divided into allergic (atopic) and non-allergic (non-atopic) asthma. Other phenotypes are based on trigger factors. Later the phenotyping based on the predominant cellular nature of inflammation: It can be divided into eosinophilic and non-eosinohilic...
April 2017: Orvosi Hetilap
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