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Exhaled breath condensate

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https://www.readbyqxmd.com/read/28415460/poly-arginine-graphene-quantum-dots-as-a-biocompatible-and-non-toxic-nanocomposite-layer-by-layer-electrochemical-preparation-characterization-and-non-invasive-malondialdehyde-sensory-application-in-exhaled-breath-condensate
#1
Mohammad Hasanzadeh, Fozieh Mokhtari, Nasrin Shadjou, Aziz Eftekhari, Ahad Mokhtarzadeh, Vahid Jouyban-Gharamaleki, Soltanali Mahboob
This study reports on the electropolymerization of a low toxic and biocompatible polymer with entitle poly arginine-graphene quantum dots (PARG-GQDs) as a novel strategy for surface modification of glassy carbon (GC) surface and preparation a new interface for biomedical application. The fabrication of PARG-GQDs on GCE was performed using Layer-by-layer regime. Scanning electron microscopy (SEM) was confirmed dispersion of GQDs on the surface of PARG which lead to increase of surface coverage of PARG. The redox behavior of prepared sensor was then characterized by cyclic voltammetry (CV), differential pulse voltammetry (DPV) and chronoamperometry (CHA), square wave voltammetry (SWV), linear sweep voltammetry (LSV)...
June 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28411827/sensitive-determination-of-malondialdehyde-in-exhaled-breath-condensate-and-biological-fluids-by-capillary-electrophoresis-with-laser-induced-fluorescence-detection
#2
Júlia Lačná, František Foret, Petr Kubáň
In this work, a sensitive capillary electrophoresis method with laser induced fluorescence detection for determination of malondialdehyde in various biological fluids was developed. Malondialdehyde reacts with thiobarbituric acid under optimized conditions of pH=2, reaction time of 60min and temperature of 90°C, yielding an adduct that can be separated in a 50mM sodium borate background electrolyte at pH 9. The separation of the formed adduct was accomplished in less than 6min with limit of detection of 1...
July 1, 2017: Talanta
https://www.readbyqxmd.com/read/28406294/non-invasive-respiratory-metabolite-analysis-associated-with-clinical-disease-in-cetaceans-a-deepwater-horizon-oil-spill-study
#3
Alberto Pasamontes, Alexander A Aksenov, Michael Schivo, Teri Rowles, Cynthia R Smith, Lori H Schwacke, Randall S Wells, Laura Yeates, Stephanie Venn-Watson, Cristina E Davis
Health assessments of wild cetaceans can be challenging due to the difficulty of gaining access to conventional diagnostic matrices of blood, serum and others. While the non-invasive detection of metabolites in exhaled breath could potentially help to address this problem, there exists a knowledge gap regarding associations between known disease states and breath metabolite profiles in cetaceans. This technology was applied to the largest marine oil spill in U.S. history (The 2010 Deepwater Horizon oil spill in the Gulf of Mexico)...
April 13, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28403875/determining-the-presence-of-asthma-related-molecules-and-salivary-contamination-in-exhaled-breath-condensate
#4
Charmion Cruickshank-Quinn, Michael Armstrong, Roger Powell, Joe Gomez, Marc Elie, Nichole Reisdorph
BACKGROUND: Researchers investigating lung diseases, such as asthma, have questioned whether certain compounds previously reported in exhaled breath condensate (EBC) originate from saliva contamination. Moreover, despite its increasing use in 'omics profiling studies, the constituents of EBC remain largely uncharacterized. The present study aims to define the usefulness of EBC in investigating lung disease by comparing EBC, saliva, and saliva-contaminated EBC using targeted and untargeted mass spectrometry and the potential of metabolite loss from adsorption to EBC sample collection tubes...
April 12, 2017: Respiratory Research
https://www.readbyqxmd.com/read/28390585/biomarkers-of-oxidative-stress-and-antioxidants-in-severe-asthma-a-prospective-case-control-study
#5
Abigail Bishopp, Ramamurthy Sathyamurthy, Sarah Manney, Craig Webbster, Mamidipudi Thirumala Krishna, Adel H Mansur
BACKGROUND: Bronchial airway inflammation is the hallmark of asthma, which may be driven by an imbalance between oxidative stress and antioxidant defenses. Antioxidants deficiency may play a role, but this has remained unconfirmed. OBJECTIVE: To evaluate the oxidative stress burden and antioxidants defenses in patients with increasing asthma severity. METHODS: This prospective case-control study compared fractional exhaled nitric oxide (FeNO), exhaled breath condensate nitrite/nitrate (EBC-NOx), spirometry, and serum vitamins and trace elements among patients with and without asthma...
April 2017: Annals of Allergy, Asthma & Immunology
https://www.readbyqxmd.com/read/28389539/microbiota-in-exhaled-breath-condensate-and-the-lung
#6
Laura Glendinning, Steven Wright, Peter Tennant, Andrew C Gill, David Collie, Gerry McLachlan
The lung microbiota is commonly sampled using relatively invasive bronchoscopic procedures. Exhaled breath condensate (EBC) collection potentially offers a less invasive alternative for lung microbiota sampling. We compared lung microbiota samples retrieved by protected specimen brushings (PSB) and exhaled breath condensate collection. We also sought to assess whether aerosolised antibiotic treatment would influence the lung microbiota and whether EBC was sensitive enough to detect such changes.EBC was collected from 6 conscious sheep, and then from the same anaesthetised sheep during mechanical ventilation...
April 7, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/28385290/post-prandial-systemic-8-isoprostane-increases-after-consumption-of-moderate-and-high-fat-meals-in-insufficiently-active-males
#7
S P Kurti, S R Emerson, S K Rosenkranz, C S Teeman, E M Emerson, B J Cull, J R Smith, C A Harms
A single high-fat meal (HFM) leads to an increase in triglycerides and oxidative stress. Oxidative stress can be assessed via 8-isoprostane generation, which is associated with the development of asthma and cardiovascular disease. No previous research has investigated whether airway and systemic 8-isoprostane increases postprandially in nonasthmatic participants according to the energy and fat content of a meal. Our purpose was to assess airway and systemic 8-isoprostane after a HFM and a true-to-life moderate-fat meal (MFM)...
March 2017: Nutrition Research
https://www.readbyqxmd.com/read/28378957/asthma-and-gastro-oesophageal-reflux-disease-a-multidisciplinary-point-of-view
#8
Paolo Solidoro, Filippo Patrucco, Sharmila Fagoonee, Rinaldo Pellicano
Asthma and gastro-oesophageal reflux (GORD) are widespread and potentially coexisting diseases. Incidence and prevalence of concomitant asthma and GORD are highly variable among studies. This is mainly due to the heterogeneity of study designs. To explain a potential link, it has been proposed some pathophysiological anomaly such as the altered pressure gradient between thorax and abdomen, the parasympathethic reflex, the hightened bronchial reactivity and chemical effects of microaspired gastric juice. An accurate diagnosis of asthma and GORD are pivotal in order to lead effective treatment and to reach a significant positive outcome, in terms of quality of life and respiratory function amelioration...
April 4, 2017: Minerva Medica
https://www.readbyqxmd.com/read/28364225/comparison-of-ambient-and-atmospheric-pressure-ion-sources-for-cystic-fibrosis-exhaled-breath-condensate-ion-mobility-mass-spectrometry-metabolomics
#9
Xiaoling Zang, José J Pérez, Christina M Jones, María Eugenia Monge, Nael A McCarty, Arlene A Stecenko, Facundo M Fernández
Cystic fibrosis (CF) is an autosomal recessive disorder caused by mutations in the gene that encodes the cystic fibrosis transmembrane conductance regulator (CFTR) protein. The vast majority of the mortality is due to progressive lung disease. Targeted and untargeted CF breath metabolomics investigations via exhaled breath condensate (EBC) analyses have the potential to expose metabolic alterations associated with CF pathology and aid in assessing the effectiveness of CF therapies. Here, transmission-mode direct analysis in real time traveling wave ion mobility spectrometry time-of-flight mass spectrometry (TM-DART-TWIMS-TOF MS) was tested as a high-throughput alternative to conventional direct infusion (DI) electrospray ionization (ESI) and atmospheric pressure chemical ionization (APCI) methods, and a critical comparison of the three ionization methods was conducted...
March 31, 2017: Journal of the American Society for Mass Spectrometry
https://www.readbyqxmd.com/read/28351016/nano-enabled-paper-humidity-sensor-for-mobile-based-point-of-care-lung-function-monitoring
#10
Mitradip Bhattacharjee, Harshal B Nemade, Dipankar Bandyopadhyay
The frequency of breathing and peak flow rate of exhaled air are necessary parameters to detect chronic obstructive pulmonary diseases (COPDs) such as asthma, bronchitis, or pneumonia. We developed a lung function monitoring point-of-care-testing device (LFM-POCT) consisting of mouthpiece, paper-based humidity sensor, micro-heater, and real-time monitoring unit. Fabrication of a mouthpiece of optimal length ensured that the exhaled air was focused on the humidity-sensor. The resistive relative humidity sensor was developed using a filter paper coated with nanoparticles, which could easily follow the frequency and peak flow rate of the human breathing...
March 22, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28321261/diagnostic-performance-of-soluble-triggering-receptor-expressed-on-myeloid-cells-1-in-ventilator-associated-pneumonia-of-patients-with-ischemic-stroke
#11
Yuetian Yu, Cheng Zhu, Chunyan Liu, Yuan Gao, Rong Yin, Jianguo Cao
Objective. To investigate the effect of soluble triggering receptor expressed on myeloid cells-1 (sTREM-1) in serum, bronchoalveolar lavage fluid (BALF), endotracheal aspiration (ETA), and exhaled breath condensate (EBC) samples as early biomarkers for the diagnosis of ventilator-associated pneumonia (VAP) in patients with ischemic stroke. Methods. One hundred and thirty-two patients with clinically suspected VAP were enrolled in this study. Bronchoscopy was performed on the day of clinically suspected VAP...
2017: Canadian Journal of Infectious Diseases & Medical Microbiology
https://www.readbyqxmd.com/read/28273583/global-dna-methylation-and-oxidative-stress-biomarkers-in-workers-exposed-to-metal-oxide-nanoparticles
#12
Saou-Hsing Liou, Wei-Te Wu, Hui-Yi Liao, Chao-Yu Chen, Cheng-Yen Tsai, Wei-Ting Jung, Hui-Ling Lee
This is the first study to assess global methylation, oxidative DNA damage, and lipid peroxidation in workers with occupational exposure to metal oxide nanomaterials (NMs). Urinary and white blood cell (WBC) 8-hydroxydeoxyguanosine (8-OHdG), and exhaled breath condensate (EBC) 8-isoprostane were measured as oxidative stress biomarkers. WBC global methylation was measured as an epigenetic alteration. Exposure to TiO2, SiO2, and indium tin oxide (ITO) resulted in significantly higher oxidative biomarkers such as urinary 8-OHdG and EBC 8-isoprostane...
February 24, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28263525/markers-of-nucleic-acids-and-proteins-oxidation-among-office-workers-exposed-to-air-pollutants-including-nano-tio2-particles
#13
Daniela Pelclova, Vladimir Zdimal, Petr Kacer, Stepanka Vlckova, Zdenka Fenclova, Tomas Navratil, Martin Komarc, Jaroslav Schwarz, Nadezda Zikova, Otakar Makes, Sergey Zakharov
OBJECTIVES: Experimental studies using nanoscale TiO2 have documented lung injury, inflammation, oxidative stress, and genotoxicity. Human health data are extremely scarce. METHODS: In exhaled breath condensate (EBC) and urine of 22 office employees occupationally exposed to TiO2 during their visit in the production workshops for average 14±9 min/day a panel of biomarkers of nucleic acids and proteins oxidation was studied, specifically 8-hydroxy-2-deoxyguanosine (8-OHdG), 8-hydroxyguanosine (8-OHG), 5-hydroxymethyl uracil (5-OHMeU), o-tyrosine (o-Tyr), 3-chlorotyrosine (3-ClTyr), and 3-nitrotyrosine (3-NOTyr)...
December 18, 2016: Neuro Endocrinology Letters
https://www.readbyqxmd.com/read/28258373/acute-respiratory-effects-and-biomarkers-of-inflammation-due-to-welding-derived-nanoparticle-aggregates
#14
Katrin Dierschke, Christina Isaxon, Ulla B K Andersson, Eva Assarsson, Anna Axmon, Leo Stockfelt, Anders Gudmundsson, Bo A G Jönsson, Monica Kåredal, Jakob Löndahl, Joakim Pagels, Aneta Wierzbicka, Mats Bohgard, Jörn Nielsen
PURPOSE: Welders are exposed to airborne particles from the welding environment and often develop symptoms work-related from the airways. A large fraction of the particles from welding are in the nano-size range. In this study we investigate if the welders' airways are affected by exposure to particles derived from gas metal arc welding in mild steel in levels corresponding to a normal welding day. METHOD: In an exposure chamber, 11 welders with and 10 welders without work-related symptoms from the lower airways and 11 non-welders without symptoms, were exposed to welding fumes (1 mg/m(3)) and to filtered air, respectively, in a double-blind manner...
March 3, 2017: International Archives of Occupational and Environmental Health
https://www.readbyqxmd.com/read/28236121/impact-of-internal-and-external-factors-on-ebc-ph-and-feno-changes-in-humans-following-challenge-with-ethyl-acrylate
#15
F Hoffmeyer, K Sucker, H Berresheim, C Monsé, B Jettkant, A Beine, M Raulf, J Bünger, T Brüning
Acute effects of ethyl acrylate exposure at 5 ppm for 4 h include changes of pH in exhaled breath condensate (EBC-pH) and exhaled nitric oxide (FeNO). So far, few data have been reported for atopic persons or the impact of the exposure conditions on biomarkers, e.g., constant versus variable application of irritants. Nine atopic and eighteen healthy volunteers without bronchial hyperresponsiveness were exposed for 4 h to ethyl acrylate concentrations of 0.05 ppm (sham), 5 ppm (constant concentration), and 0-10 ppm (variable, mean concentration of 5 ppm) in an exposure laboratory...
February 25, 2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/28209042/-determination-of-biomarkers-in-exhaled-breath-condensation-of-acute-exacerbation-of-chronic-obstructive-pulmonary-disease-and-its-clinical-implications
#16
X Q Dong, Q Shen, Y N Yao, J J Chen, G H Lu, J Y Zhou
Objective: To analyse the changes and clinical implication of biomarkers in exhaled breath condensates (EBC) of acute exacerbation of chronic obstructive pulmonary disease (AECOPD) before and after treatment. Methods: 20 patients with AECOPD were enrolled, including 15 males and 5 females. The average age was 71±10, ranging from 50-85. The concentrations of Leukotriene B4 (LTB4) and Interleukin 6 (IL-6) from EBC were assayed by ELISA kit before and after treatment. Serum inflammatory indexes, pulmonary function test and quality of life (CAT) were observed at the same time, the relationship between EBC biomarkers and clinical markers were investigated...
February 12, 2017: Chinese Journal of Tuberculosis and Respiratory Diseases
https://www.readbyqxmd.com/read/28199989/presence-of-cancer-associated-mutations-in-exhaled-breath-condensates-of-healthy-individuals-by-next-generation-sequencing
#17
Omar Youssef, Aija Knuuttila, Päivi Piirilä, Tom Böhling, Virinder Sarhadi, Sakari Knuutila
Exhaled breath condensate (EBC) is a non-invasive source that can be used for studying different genetic alterations occurring in lung tissue. However, the low yield of DNA available from EBC has hampered the more detailed mutation analysis by conventional methods. We applied the more sensitive amplicon-based next generation sequencing (NGS) to identify cancer related mutations in DNA isolated from EBC. In order to apply any method for the purpose of mutation screening in cancer patients, it is important to clarify the incidence of these mutations in healthy individuals...
March 14, 2017: Oncotarget
https://www.readbyqxmd.com/read/28169345/bronchoalveolar-lavage-proteomics-in-patients-with-suspected-lung-cancer
#18
Ana Sofia Carvalho, Célia Marina Cuco, Carla Lavareda, Francisco Miguel, Mafalda Ventura, Sónia Almeida, Paula Pinto, Tiago Tavares de Abreu, Luís Vaz Rodrigues, Susana Seixas, Cristina Bárbara, Mikel Azkargorta, Felix Elortza, Júlio Semedo, John K Field, Leonor Mota, Rune Matthiesen
Lung cancer configures as one of the deadliest types of cancer. The future implementation of early screening methods such as exhaled breath condensate analysis and low dose computed tomography (CT) as an alternative to current chest imaging based screening will lead to an increased burden on bronchoscopy units. New approaches for improvement of diagnosis in bronchoscopy units, regarding patient management, are likely to have clinical impact in the future. Diagnostic approaches to address mortality of lung cancer include improved early detection and stratification of the cancers according to its prognosis and further response to drug treatment...
February 7, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28163602/differential-pattern-of-deposition-of-nanoparticles-in-the-airways-of-exposed-workers
#19
Elizabeth Fireman, Rinat Edelheit, Moshe Stark, Amir Bar Shai
Ultrafine particles (UFP) have been postulated to significantly contribute to the adverse health effects associated with exposure to particulate matter (PM). Due to their extremely small size (aerodynamic diameter <100 nm), UFP are able to deposit deep within the lung after inhalation and evade many mechanisms responsible for the clearance of larger particles. There is a lack of biologically relevant personal exposure metrics for exposure to occupational- and environmental-related micro- and nano-sized PM...
2017: Journal of Nanoparticle Research: An Interdisciplinary Forum for Nanoscale Science and Technology
https://www.readbyqxmd.com/read/28152602/feasibility-of-early-detection-of-cystic-fibrosis-acute-pulmonary-exacerbations-by-exhaled-breath-condensate-metabolomics-a-pilot-study
#20
Xiaoling Zang, María Eugenia Monge, Nael A McCarty, Arlene A Stecenko, Facundo M Fernández
Progressive lung function decline and, ultimately, respiratory failure are the most common cause of death in patients with cystic fibrosis (CF). This decline is punctuated by acute pulmonary exacerbations (APEs), and in many cases, there is a failure to return to baseline lung function. Ultraperformance liquid chromatography quadrupole-time-of-flight mass spectrometry was used to profile metabolites in exhaled breath condensate (EBC) samples from 17 clinically stable CF patients, 9 CF patients with an APE severe enough to require hospitalization (termed APE), 5 CF patients during recovery from a severe APE (termed post-APE), and 4 CF patients who were clinically stable at the time of collection but in the subsequent 1-3 months developed a severe APE (termed pre-APE)...
February 3, 2017: Journal of Proteome Research
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