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Exhaled nitric oxide

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https://www.readbyqxmd.com/read/29775687/effects-of-bronchodilation-on-biomarkers-of-peripheral-airway-inflammation-in-copd
#1
Pierachille Santus, Dejan Radovanovic, Susanna Mascetti, Alessia Pauletti, Vincenzo Valenti, Marco Mantero, Alberto Papi, Marco Contoli
Peripheral airway inflammation and dysfunction are key elements in the pathogenesis of COPD. The exhaled alveolar fraction of nitric oxide (CANO) is an indirect biomarker of lung peripheral inflammation. We tested whether inhaled long-acting bronchodilators (LABA) can affect CANO and we evaluated correlations with lung mechanics in patients with COPD. Two-centre, randomised, double blind, crossover study including COPD patients with moderate-to-severe airflow obstruction. Following a pharmacological washout, multi-flow exhaled fraction of NO (FENO), plethysmography, lung diffusion (DLCO), single breath nitrogen washout test and dyspnoea were measured in a crossover manner at baseline and 30, 60 and 180 minutes following administration of salmeterol (Sal) or formoterol fumarate (FF)...
May 15, 2018: Pharmacological Research: the Official Journal of the Italian Pharmacological Society
https://www.readbyqxmd.com/read/29761475/exhaled-breath-analysis-in-evaluation-of-psychological-stress-a-short-literature-review
#2
REVIEW
Alessandro Tonacci, Francesco Sansone, Anna Paola Pala, Raffaele Conte
Physiological stress is pervasive in today's society. Its detection is normally performed through several unobtrusive methods, driving both caregivers and patients to take measures to reduce the burden of this condition on human health. Among the methods for assessing stress, exhaled breath analysis represents a non-invasive, real-time alternative to classic laboratory tests. Therefore, a literature review was performed to assess the presence of altered parameters, related to psychological stress, in exhaled breath...
May 15, 2018: International Journal of Psychology: Journal International de Psychologie
https://www.readbyqxmd.com/read/29757001/exhaled-nitric-oxide-changes-during-acclimatization-to-high-altitude-a-descriptive-study
#3
Douglas T Summerfield, Kirsten E Coffman, Bryan J Taylor, Amine N Issa, Bruce D Johnson
Summerfield, Douglas T., Kirsten E. Coffman, Bryan J. Taylor, Amine N. Issa, and Bruce D. Johnson. Exhaled nitric oxide changes during acclimatization to high altitude: a descriptive study. High Alt Med Biol. 00:000-000, 2018. AIMS: This study describes differences in the partial pressures of exhaled nitric oxide (PeNO) between subjects fully acclimatized (ACC) to 5300 m and those who have just arrived to high altitude. METHODS: PeNO was determined in eight subjects newly exposed and nonacclimatized (non-ACC) to high altitude and compared with that in nine subjects who had ACC to high altitude for 1 month...
May 14, 2018: High Altitude Medicine & Biology
https://www.readbyqxmd.com/read/29754974/implication-of-fraction-of-exhaled-nitric-oxide-and-blood-eosinophil-count-in-severe-asthma
#4
Tomoyuki Soma, Hidetoshi Iemura, Erika Naito, Sachiko Miyauchi, Yoshitaka Uchida, Kazuyuki Nakagome, Makoto Nagata
BACKGROUND: Severe asthma is a complex disease with heterogeneous features and involves type 2 airway inflammation, including eosinophil accumulation. Surrogate biomarkers, fraction of exhaled nitric oxide (FeNO) and blood eosinophil count (b-EOS), may predict eosinophilic airway inflammation. Here we investigated clinical characteristics of severe asthma phenotype using a combined analysis of FeNO and b-EOS. METHODS: This retrospective study examined clinical data of patients with severe asthma (N = 107; median age, 64 years) treated at Saitama Medical University Hospital from 2009 to 2016...
May 10, 2018: Allergology International: Official Journal of the Japanese Society of Allergology
https://www.readbyqxmd.com/read/29746003/ige-sensitisation-to-food-allergens-and-airborne-allergens-in-relation-to-biomarkers-of-type-2-inflammation-in-asthma
#5
A Patelis, K Alving, R Middelveld, A James, J Ono, S Ohta, K Izuhara, M P Borres, B Forsberg, C Janson, A Malinovschi
BACKGROUND: We have recently reported that sensitisation to food allergens and sensitisation to airborne allergens had independent associations with increased fraction of exhaled nitric oxide (FeNO) and blood eosinophils in middle-aged adults and in young subjects with asthma. OBJECTIVE: To investigate the relation between IgE sensitisation and several type 2 inflammation biomarkers in adult asthmatics. METHODS: FeNO, urinary eosinophil-derived neurotoxin (U-EDN), serum eosinophil cationic protein (S-ECP) and periostin were measured in 396 asthmatics, aged 17-76 years, from the Swedish GA2LEN study...
May 10, 2018: Clinical and Experimental Allergy: Journal of the British Society for Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/29729518/short-term-effects-of-physical-activity-air-pollution-and-their-interaction-on-the-cardiovascular-and-respiratory-system
#6
Michelle Laeremans, Evi Dons, Ione Avila-Palencia, Glòria Carrasco-Turigas, Juan Pablo Orjuela, Esther Anaya, Tom Cole-Hunter, Audrey de Nazelle, Mark Nieuwenhuijsen, Arnout Standaert, Martine Van Poppel, Patrick De Boever, Luc Int Panis
Physical activity (PA) in urban environments may lead to increased inhalation of air pollutants. As PA and air pollution (AP) have respectively beneficial and detrimental effects on the cardiorespiratory system, the responses to these exposures can interact. Therefore, we assessed the short-term effects of PA, AP and their interaction on a set of subclinical cardiovascular and respiratory outcomes in a panel of healthy adults: heart rate variability (HRV), retinal vessel diameters, lung function and fractional exhaled nitric oxide (FeNO)...
May 2, 2018: Environment International
https://www.readbyqxmd.com/read/29719507/breathomics-for-assessing-the-effects-of-treatment-and-withdrawal-with-inhaled-beclomethasone-formoterol-in-patients-with-copd
#7
Paolo Montuschi, Giuseppe Santini, Nadia Mores, Alessia Vignoli, Francesco Macagno, Rugia Shoreh, Leonardo Tenori, Gina Zini, Leonello Fuso, Chiara Mondino, Corrado Di Natale, Arnaldo D'Amico, Claudio Luchinat, Peter J Barnes, Tim Higenbottam
Background: Prospective pharmacological studies on breathomics profiles in COPD patients have not been previously reported. We assessed the effects of treatment and withdrawal of an extrafine inhaled corticosteroid (ICS)-long-acting β2 -agonist (LABA) fixed dose combination (FDC) using a multidimensional classification model including breathomics. Methods: A pilot, proof-of-concept, pharmacological study was undertaken in 14 COPD patients on maintenance treatment with inhaled fluticasone propionate/salmeterol (500/50 μg b...
2018: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/29714162/exhaled-nitric-oxide-is-not-a-biomarker-for-pulmonary-tuberculosis
#8
José W López, Maria-Cristina I Loader, Dan Smith, Dan Pastorius, Marjory Bravard, Luz Caviedes, Karina M Romero, Taryn Clark, William Checkley, Eduardo Ticona, Jon S Friedland, Robert H Gilman
To reduce transmission of tuberculosis (TB) in resource-limited countries where TB remains a major cause of mortality, novel diagnostic tools are urgently needed. We evaluated the fractional concentration of exhaled nitric oxide (FeNO) as an easily measured, noninvasive potential biomarker for diagnosis and monitoring of treatment response in participants with pulmonary TB including multidrug resistant-TB in Lima, Peru. In a longitudinal study however, we found no differences in baseline median FeNO levels between 38 TB participants and 93 age-matched controls (13 parts per billion [ppb] [interquartile range (IQR) = 8-26] versus 15 ppb [IQR = 12-24]), and there was no change over 60 days of treatment (15 ppb [IQR = 10-19] at day 60)...
April 30, 2018: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/29701312/tidal-breath-eno-measurements-in-a-cohort-of-unsedated-hospitalized-neonates-a-method-validation
#9
Birgitte J Schmidt, Pauline S Reim, Andreas K Jensen, Per Albertsen, Gorm Greisen, Inger M Jørgensen
AIM: Exhaled Nitric oxide (eNO) is an inflammatory marker. In 2002 Hall et al. [J Appl Physiol. 92:59-66] established an infant eNO measurement method, fulfilling four criteria of feasibility: simple, non-invasive, without impact on the natural breathing pattern, and accounting for flow by NO output (V'NO). Although tidal breathing is accepted as an eNO measurement method in uncooperative patients, it is seldom used outside research labs. The variability and lack of validated methods have restrained from exploring the area in preterm and term neonates the last years...
April 27, 2018: Pediatric Pulmonology
https://www.readbyqxmd.com/read/29692617/both-fractional-exhaled-nitric-oxide-and-sputum-eosinophil-were-associated-with-uncontrolled-asthma
#10
Jie Gao, Zhaocheng Chen, Xiang Jie, Ruihua Ye, Feng Wu
Background: Sputum eosinophil and fractional exhaled nitric oxide (FeNO), noninvasive biomarkers of local eosinophilic airway inflammation, can be used to assess asthma outcome. Nevertheless, the clinical application of the association between FeNO and sputum eosinophil is controversial. The aim of the study was to investigate the predictive relationship between FeNO and sputum eosinophil in uncontrolled asthmatic patients and the correlation between sputum eosinophil and FeNO in bronchial reversibility and bronchial hyperresponsiveness (BHR)...
2018: Journal of Asthma and Allergy
https://www.readbyqxmd.com/read/29690880/abnormal-pulmonary-function-tests-predict-the-development-of-radiation-induced-pneumonitis-in-advanced-non-small-cell-lung-cancer
#11
L Torre-Bouscoulet, W R Muñoz-Montaño, D Martínez-Briseño, F J Lozano-Ruiz, R Fernández-Plata, J A Beck-Magaña, C García-Sancho, A Guzmán-Barragán, E Vergara, M Blake-Cerda, L Gochicoa-Rangel, F Maldonado, M Arroyo-Hernández, O Arrieta
BACKGROUND: Radiation pneumonitis (RP) is a frequent complication of concurrent chemoradiotherapy (CCRT) and is associated with severe symptoms that decrease quality of life and might result in pulmonary fibrosis or death. The aim of this study is to identify whether pulmonary function test (PFT) abnormalities may predict RP in non-small cell lung cancer (NSCLC) patients. METHODS: A prospective multi-institutional study was conducted with locally advanced and oligometastatic NSCLC patients...
April 24, 2018: Respiratory Research
https://www.readbyqxmd.com/read/29682796/phase-2a-randomized-double-blind-placebo-controlled-multicenter-parallel-group-study-of-an-h-4-r-antagonist-jnj-39758979-in-adults-with-uncontrolled-asthma
#12
Alexa P Kollmeier, Andrew Greenspan, Xie L Xu, Philip E Silkoff, Elliot Barnathan, Matthew J Loza, Jingzhi Jiang, Bei Zhou, Bin Chen, Robin L Thurmond
BACKGROUND: The effects of H4 R antagonists in preclinical asthma models support the study of antagonists of the H4 R in the treatment of asthma in humans. JNJ-39758979 is a potent and highly-selective oral H4 R antagonist. OBJECTIVE: We sought to evaluate the safety and efficacy of the H4 R-antagonist JNJ-39758979 in adult patients with uncontrolled asthma. METHODS: One hundred and fifteen eligible patients were randomly assigned to JNJ-39758979 300 mg or placebo once daily for 12 weeks in this phase 2a, double-blind, multicenter, placebo-controlled study...
April 23, 2018: Clinical and Experimental Allergy: Journal of the British Society for Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/29680435/comparison-of-two-exhaled-biomarkers-in-children-with-and-without-sleep-disordered-breathing
#13
Mario Barreto, Paolo Montuschi, Melania Evangelisti, Susanna Bonafoni, Manuela Cecili, Rugia Shohreh, Giuseppe Santini, Maria Pia Villa
OBJECTIVE: Airway oxidative stress and inflammation are likely to be involved in sleep disordered breathing (SDB) in children. We aimed to measure concentrations of 8-isoprostane (8-IsoP) in the exhaled breath condensate (EBC) and exhaled nitric oxide (FENO ) in patients with SBD and healthy children, in order to assess the relationship between these two biomarkers, disease severity, and overnight changes. METHODS: Patients with SDB (n = 46) and healthy controls (n = 20) aged 4...
May 2018: Sleep Medicine
https://www.readbyqxmd.com/read/29677834/functionalized-carbon-nanotube-sensors-for-the-detection-of-sub-ppm-nitric-oxide-gas
#14
Byeong-Cheol Kang, Jun-Young Jeon, Young Tae Byun, Tae-Jun Ha
In this paper, we demonstrate the highly sensitive carbon nanotube (CNT) sensors for the detection of sub-ppm nitric oxide (NO) gas operating at room temperature. Such achievement can be realized by functionalizing CNT thin films with amine-based polymers through a solution-process technology at low temperature. In addition to high sensitivity, functionalized CNT sensors exhibit high selectivity towards NO gas, which is an effective and practical factor for health-care monitoring nano-electronics. We also investigated the effect of a post-cleaning treatment on the sensing performance of functionalized CNT thin films for sub-ppm NO gas sensors...
September 1, 2018: Journal of Nanoscience and Nanotechnology
https://www.readbyqxmd.com/read/29668530/cardiorespiratory-effects-of-air-pollution-in-a-panel-study-of-winter-outdoor-physical-activity-in-older-adults
#15
David M Stieb, Robin Shutt, Lisa Marie Kauri, Gail Roth, Mieczyslaw Szyszkowicz, Nina A Dobbin, Li Chen, Marc Rigden, Keith Van Ryswyk, Ryan Kulka, Branka Jovic, Marie Mulholland, Martin S Green, Ling Liu, Guillaume Pelletier, Scott A Weichenthal, Robert E Dales
OBJECTIVE: The aim of this study was to assess cardiorespiratory effects of air pollution in older adults exercising outdoors in winter. METHODS: Adults 55 years of age and older completed daily measurements of blood pressure, peak expiratory flow and oximetry, and weekly measurements of heart rate variability, endothelial function, spirometry, fraction of exhaled nitric oxide and urinary oxidative stress markers, before and after outdoor exercise, for 10 weeks...
April 17, 2018: Journal of Occupational and Environmental Medicine
https://www.readbyqxmd.com/read/29660141/carbonic-anhydrase-is-not-a-relevant-nitrite-reductase-or-nitrous-anhydrase-in-the-lung
#16
Philipp A Pickerodt, Sebastian Kronfeldt, Martin Russ, Adrian Gonzalez-Lopez, Philipp Lother, Elvira Steiner, Katja Vorbrodt, Thilo Busch, Willehad Boemke, Roland C E Francis, Erik R Swenson
The carbonic anhydrase (CA) inhibitors, acetazolamide and its structurally similar analogue, methazolamide prevent or reduce hypoxic pulmonary vasoconstriction (HPV) in dogs and humans in vivo, by a mechanism unrelated to CA inhibition. In rodent blood and isolated blood vessels, Aamand et al. (2009) reported that inhibition of CA led to increased generation of nitric oxide (NO) from nitrite and vascular relaxation in vitro. We tested the physiological relevance of augmented NO generation by CA from nitrite with acetazolamide in anaesthetized pigs during alveolar hypoxia in vivo...
April 16, 2018: Journal of Physiology
https://www.readbyqxmd.com/read/29650557/sputum-proteomics-and-airway-cell-transcripts-of-current-and-ex-smokers-with-severe-asthma-in-u-biopred-an-exploratory-analysis
#17
Kentaro Takahashi, Stelios Pavlidis, Francois Ng Kee Kwong, Uruj Hoda, Christos Rossios, Kai Sun, Matthew Loza, Fred Baribaud, Pascal Chanez, Steve J Fowler, Ildiko Horvath, Paolo Montuschi, Florian Singer, Jacek Musial, Barbro Dahlen, Sven-Eric Dahlen, N Krug, Thomas Sandstrom, Dominic E Shaw, Rene Lutter, Per Bakke, Louise J Fleming, Peter H Howarth, Massimo Caruso, Ana R Sousa, Julie Corfield, Charles Auffray, Bertrand De Meulder, Diane Lefaudeux, Ratko Djukanovic, Peter J Sterk, Yike Guo, Ian M Adcock, Kian Fan Chung
Background: Severe asthma patients with a significant smoking history have airflow obstruction with reported neutrophilia. We hypothesise that multi-omic analysis will enable the definition of smoking and ex-smoking severe asthma molecular phenotypes. Methods: The U-BIOPRED severe asthma patients containing current-smokers (CSA), ex-smokers (ESA), non-smokers (NSA) and healthy non-smokers (NH) was examined. Blood and sputum cell counts, fractional exhaled nitric oxide and spirometry were obtained. Exploratory proteomic analysis of sputum supernatants and transcriptomic analysis of bronchial brushings, biopsies and sputum cells was performed...
April 12, 2018: European Respiratory Journal: Official Journal of the European Society for Clinical Respiratory Physiology
https://www.readbyqxmd.com/read/29648484/serum-periostin-levels-serve-as-a-biomarker-for-both-eosinophilic-airway-inflammation-and-fixed-airflow-limitation-in-well-controlled-asthmatics
#18
Kentaro Takahashi, Kazuyuki Meguro, Hirotoshi Kawashima, Daisuke Kashiwakuma, Shin-Ichiro Kagami, Shoichiro Ohta, Junya Ono, Kenji Izuhara, Itsuo Iwamoto
OBJECTIVE: Periostin, a matricellular protein, is produced from airway epithelial cells and lung fibroblasts by IL-13. It has been suggested that periostin is involved in allergic inflammation and fibrosis. However, the usefulness of serum periostin measurement in the assessment of airway inflammation and remodeling and management of asthmatic patients is still debated. We aimed to determine whether serum periostin levels reflect eosinophilic airway inflammation and airway remodeling in asthma...
April 12, 2018: Journal of Asthma: Official Journal of the Association for the Care of Asthma
https://www.readbyqxmd.com/read/29644894/decreased-epithelial-and-sputum-mir-221-3p-associates-with-airway-eosinophilic-inflammation-and-cxcl17-expression-in-asthma
#19
Kan Zhang, Yuxia Liang, Yuchen Feng, Wenliang Wu, Huilan Zhang, Jianguo He, Qinghua Hu, Jian-Ping Zhao, Yongjian Xu, Zheng Liu, Guohua Zhen
Airway eosinophilic inflammation is a key feature of type 2-high asthma. The role of epithelial miRNA in airway eosinophilic inflammation remains unclear. We examined the expression of miR-221-3p in bronchial brushings, induced sputum and plasma from 77 symptomatic, recently diagnosed steroid-naïve subjects with asthma and 36 healthy controls by quantitative PCR, and analyzed the correlation between miR-221-3p expression and airway eosinophilia. We found that epithelial, sputum and plasma miR-221-3p expression was significantly decreased in subjects with asthma...
April 12, 2018: American Journal of Physiology. Lung Cellular and Molecular Physiology
https://www.readbyqxmd.com/read/29627118/alveolar-and-bronchial-nitric-oxide-in-chronic-obstructive-pulmonary-disease-and-asthma-copd-overlap
#20
Bernardino Alcázar-Navarrete, Francisca Castellano Miñán, Pablo Santiago Díaz, Oliveiro Ruiz Rodríguez, Pedro J Romero Palacios
INTRODUCTION: Exhaled nitric oxide (FENO ) measurements differentiate COPD phenotypes from asthma-COPD overlap (ACO). To date, no study has been conducted to determine whether alveolar and bronchial components differ in this group of patients. METHODS: This was an observational cross-sectional study recruiting ambulatory COPD patients. FENO was measured, differentiating alveolar (CANO ) from bronchial (JawNO ) components using a multiple-flow technique. CANO and JawNO values were compared between eosinophilic COPD patients (defined as ≥ 300 eosinophils/μL in peripheral blood test, or ≥ 2% eosinophils or ≥ 3% eosinophils), and a linear regression analysis was performed to determine clinical and biological variables related to these measurements...
April 4, 2018: Archivos de Bronconeumología
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