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Journal of Breath Research

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https://www.readbyqxmd.com/read/28808178/metabolomic-profiles-of-plasma-exhaled-breath-condensate-and-saliva-are-correlated-with-potential-for-air-toxics-detection
#1
Chandresh Nanji Ladva, Rachel Golan, Roby Greenwald, Tianwei Yu, Stefanie Ebelt Sarnat, W Dana Flanders, Karan Uppal, Douglas I Walker, ViLinh Tran, Donghai Liang, Dean P Jones, Jeremy Sarnat
Advances in the development of high-resolution metabolomics (HRM) have provided new opportunities for their use in characterizing exposures to environmental air pollutants and air pollution-related disease etiologies. Exposure assessment studies have considered blood, breath, and saliva as biological matrices suitable for measuring responses to air pollution exposures. The current study examines comparability among these three matrices using HRM and explored their potential for measuring mobile source air toxics...
August 15, 2017: Journal of Breath Research
https://www.readbyqxmd.com/read/28795953/diagnostic-accuracy-of-breath-tests-for-pneumoconiosis-using-an-electronic-nose
#2
Pau-Chung Chen, Hsin-Yi Peng, Che-Jui Chang, Hsiao-Yu Yang
Breath analyses have attracted substantial attention as screens for occupational environmental lung disease. The objective of this study was to develop breath tests for pneumoconiosis by analysing volatile organic compounds using an electronic nose. A case-control study was designed. We screened 102 subjects from a cohort of stone workers. After excluding three subjects with poorly controlled diabetes mellitus and one subject with asthma, 98 subjects were enrolled, including 34 subjects with pneumoconiosis and 64 healthy controls...
August 10, 2017: Journal of Breath Research
https://www.readbyqxmd.com/read/28775245/the-necessity-of-external-validation-in-exhaled-breath-research-a-case-study-of-sarcoidosis
#3
Rianne Fijten, Agnieszka Smolinska, Marjolein Drent, Jan Dallinga, Remy Mostard, Daniëlle Pachen, Frederik Jan van Schooten, Agnes Boots
As in other disciplines of 'omics' research, reproducibility is a major problem in exhaled breath research. Many studies report discriminatory volatiles in the same disease, yet the similarity between lists of identified compounds is low. This can occur due to many factors including the lack of internal and in particular external validation. In an ideal situation, an external validation - sampled at for example a different location - is always included to ensure generalization of the observed findings to a general population...
August 4, 2017: Journal of Breath Research
https://www.readbyqxmd.com/read/28775244/exhaled-breath-condensate-as-a-potential-biomarker-tool-for-idiopathic-pulmonary-fibrosis-a-pilot-study
#4
Barbara Rindlisbacher, Carina Strebel, Sabina A Guler, Attila Kollar, Thomas K Geiser, Georg Martin Fiedler, Alexander Benedikt Leichtle, Cedric Bovet, Manuela Funke
Idiopathic pulmonary fibrosis (IPF) is a devastating lung disease with poor survival. There is an urgent need to better diagnose and monitor IPF patients as new treatments are now available which slow down disease progression. Exhaled breath condensate (EBC) is easily and non-invasively collected, but analysis of potential biomarkers is difficult due to low concentrations and methodological limitations. We now used a non-targeted metabolomics approach to identify further discriminatory metabolic profiles that distinguish IPF patients from controls...
August 4, 2017: Journal of Breath Research
https://www.readbyqxmd.com/read/28768897/strategies-for-the-identification-of-disease-related-patterns-of-volatile-organic-compounds-prediction-of-paratuberculosis-in-an-animal-model-using-random-forests
#5
Elisa Kasbohm, Sina Fischer, Anne Küntzel, Peter Oertel, Andreas Bergmann, Phillip Trefz, Wolfram Miekisch, Jochen Schubert, Petra Reinhold, Mario Ziller, Andreas Fröhlich, Volkmar Liebscher, Heike Köhler
Recently, modern statistical methods which were developed for automated pattern recognition are being used increasingly for data analysis in studies on emissions of volatile organic compounds (VOCs). With the detection of disease-related VOC profiles, novel non-invasive diagnostic tools could be developed for clinical applications. However, it is important to bear in mind that not all statistical methods are suited for the investigation of VOC profiles. In particular univariate methods are not able to discover VOC patterns as they consider each compound separately...
August 3, 2017: Journal of Breath Research
https://www.readbyqxmd.com/read/28742064/the-effect-of-biosilver-nanoparticles-on-different-bacterial-strains-metabolism-reflected-in-their-vocs-profiles
#6
Boguslaw Buszewski, Ileana Andreea Ratiu, Maciej Milanowski, Pawel Pomastowski, Tomasz Ligor
Silver nanoparticles use has spawned during the last years a growing interest for many researchers, due to their bacteriostatic and bactericidal properties and synergetic effects, when they are used together with antibiotics, for an increased efficiency and less adverse reactions in treatment of bacterial infections. GC-MS (gas chromatography coupled with mass spectrometry), which is considered "the golden standard" in chemical analysis has proven to be a reliable instrument, perfectly suitable for clinical analysis...
July 25, 2017: Journal of Breath Research
https://www.readbyqxmd.com/read/28742057/effect-of-photodynamic-therapy-in-the-reduction-of-halitosis-in-patients-with-multiple-sclerosis-clinical-trial
#7
Marcela Leticia Leal Gonçalves, Sandra Kalil Bussadori, Yara Dadalti Fragoso, Vinícius Vieira Belarmino da Silva, Alessandro M Deana, Ana Carolina Ciarcia, Erika Horácio Pinto, Anna Carolina Ratto Tempestini Horliana, Cristiane Miranda França
Smell and odours play a vital role in social interaction. Halitosis is a social problem that affects one-third of the population causing a negative impact in the quality of life. There is little knowledge on the prevalence and management of halitosis in Multiple Sclerosis (MS) patients. The present study aimed to evaluate the presence of halitosis in patients with MS when compared to a control group and the treatment with antimicrobial photodynamic therapy (aPDT) against halitosis. This is a case-control clinical study where 60 patients were evaluated: 30 MS patients in treatment at the Specialties Clinic School of Medicine, and 30 healthy patients, matched in age and gender, for the control group...
July 25, 2017: Journal of Breath Research
https://www.readbyqxmd.com/read/28742055/kinetic-validation-of-the-limax-test-during-10-000-intravenous-13c-methacetin-breath-tests
#8
Tom Moses Rubin, Karsten Heyne, Axel Luchterhand, Jan Bednarsch, Florian W Vondran, Georgios Polychronidis, Maciej Malinowski, Alen Nikolic, Hans-Michael Tautenhahn, Maximilian Jara, Tilo Wuensch, Martin Stockmann, Johan Friso Lock
The LiMAx test, a novel 13C-methacetin-breath-test, has proven clinical validity in determining the hepatic metabolic capacity. In contrast to prior 13C-methacetin-breath-test protocols, the LiMAx-test is performed by intravenous body-weight adjusted substrate administration. Furthermore, the DOB kinetics (Delta over Baseline of the time dependent exhaled 13CO2/12CO2-ratio) are measured online at bedside with a high time resolution in order to determine the DOB maximum. The aim of this study was to analyze the recorded DOB kinetics in a large population for further refinement of the test protocol...
July 25, 2017: Journal of Breath Research
https://www.readbyqxmd.com/read/28696336/perspectives-on-exhaled-nitric-oxide
#9
Fabio Luigi Massimo Ricciardolo, Philip E Silkoff
The history of nitric oxide (NO) in respiratory field dates back to the beginning of '90s with the ancestral study by Lars Gustafsson et al. describing the presence of endogenous NO in the exhaled breath of human beings. Soon after, independent studies showed that exhaled NO concentrations (FENO) is higher in asthmatics than in normal subjects. Not all asthmatics demonstrate a high FENO reflecting heterogeneity of asthma. High values of FENO are associated with over-expression of corticosteroid-sensitive iNOS isoform and allergic/eosinophilic inflammation...
July 11, 2017: Journal of Breath Research
https://www.readbyqxmd.com/read/28686173/comparison-of-fractional-exhaled-nitric-oxide-levels-in-chronic-obstructive-pulmonary-disease-bronchial-asthma-and-healthy-subjects-of-nepal
#10
Sanjeet Krishna Shrestha, Sanjeev Shrestha, Lucky Sharma, Subash Pant, Arpana Neopane
INTRODUCTION Fractional exhaled nitric oxide levels in exhaled breath can indicate on-going eosinophilic airway inflammation, specifically in asthma. But, its utility is being explored for airway centric inflammations including chronic obstructive pulmonary disease. Normal levels of fractional exhaled nitric oxide (FENO50) have been defined in different studies but not in Nepal. This study compares fractional exhaled nitric oxide levels in all three groups: normal, asthma and chronic obstructive pulmonary disease...
July 7, 2017: Journal of Breath Research
https://www.readbyqxmd.com/read/28671107/volatile-compounds-in-blood-headspace-and-nasal-breath
#11
Brian M Ross, Randa Babgi
Breath analysis is a form of metabolomics that utilises the identification and quantification of volatile chemicals to provide information about physiological or pathological processes occurring within the body. An inherent assumption of such analyses is that the concentration of the exhaled gases correlates with the concentration of the same gas in the tissue of interest. In this study we have investigated this assumption by quantifying some volatile compounds in peripheral venous blood headspace, and in nasal breath collected in Tedlar bags obtained at the same time from 30 healthy volunteers, prior to analysis by Selected Ion Flow Tube Mass Spectrometry...
July 3, 2017: Journal of Breath Research
https://www.readbyqxmd.com/read/28665296/comparison-of-feasibility-and-estimates-of-central-and-peripheral-nitric-oxide-parameters-by-different-mathematical-models
#12
Tuomas Karvonen, Hannu Kankaanranta, Seppo Saarelainen, Eeva Moilanen, Lauri Lehtimäki
Assessing central and peripheral nitric oxide (NO) dynamics of the lung provides information on the severity and anatomical site of pulmonary inflammation. Several mathematical methods to calculate alveolar and bronchial NO parameters have been introduced. Our aim was to compare these methods. Methods: The study included 69 healthy adults, 66 healthy children, 73 asbestos-exposed subjects and 72 subjects with chronic obstructive pulmonary disease (COPD). Exhaled NO was measured at multiple flow rates and we used five mathematical methods (Tsoukias & George, Pietropaoli, Condorelli, Högman & Meriläinen, and Silkoff) to estimate alveolar and bronchial NO parameters...
June 30, 2017: Journal of Breath Research
https://www.readbyqxmd.com/read/28656903/association-of-extended-nitric-oxide-parameters-with-bronchial-hyperresponsiveness-and-bronchodilator-response-in-children-with-asthma
#13
Yoon Hee Kim, In Suk Sol, Seo Hee Yoon, Min Jung Kim, Kyung Won Kim, Myunghyun Sohn, Kyu-Earn Kim
Theoretical non-linear modeling of exhaled nitric oxide has revealed extended flow-independent parameters that could explain where or how nitric oxide is produced in the lung and transferred to the airway gas stream. We aimed to evaluate the associations of bronchial hyperresponsiveness and bronchodilator response with extended flow-independent nitric oxide parameters. Nitric oxide (30, 50, 100, 200 mL/s) was measured in 432 children with asthma on the same day as either methacholine challenge test (n=156) or spirometry with bronchodilator (n=276; 96 previously diagnosed with asthma and treated with inhaled corticosteroid, 37 with acute exacerbation treated with systemic corticosteroid)...
June 28, 2017: Journal of Breath Research
https://www.readbyqxmd.com/read/28649974/utility-of-sup-13-sup-c-methacetin-breath-test-in-predicting-long-term-survival-of-patients-with-decompensated-cirrhosis
#14
Segundo Moran, Aline Mina, Ximena Duque, Nayeli Ortiz-Olvera, Gustavo Rodríguez-Leal, Jose Sierra-Ramirez, Roberto Medina, Robertino Mera, Misael Uribe
The 13C-methacetin breath test (13C-MeBT) is a noninvasive tool that allows evaluation of the functional activity of the liver and the prediction of liver cirrhosis. Nevertheless, there is no information on its potential utility to predict long-term survival in patients with liver disease. Methods: Patients with cirrhosis were selected. All patients underwent a complete clinical assessment, standard biochemical tests, and 13C-MeBT at the beginning of the study. Death was recorded during the three years of follow-up...
June 26, 2017: Journal of Breath Research
https://www.readbyqxmd.com/read/28649963/the-effect-of-growth-medium-on-i-escherichia-coli-i-pathway-mirrored-into-gc-ms-profiles
#15
Ileana Andreea Ratiu, Tomasz Ligor, Victor Bocos-Bintintan, Hossam Al-Suod, Tomasz Kowalkowski, Katarzyna Rafińska, Boguslaw Buszewski
Escherichia coli (E. coli) is a gram-negative coliform bacterium that is commonly found in the lower intestine of warm-blooded organisms. Most of the strains are harmless, but some serotypes are pathogenic, meaning they can cause illness, either diarrhea or illness outside of the intestinal tract. The aim of this work was to assess which components are generated in case of E. coli target analysis needed. In this purpose our study intends to emphasize the importance of the cultivability and to prove the crucial role of growth media used in bacteria growing...
June 26, 2017: Journal of Breath Research
https://www.readbyqxmd.com/read/28649095/the-detection-of-hepatocellular-carcinoma-hcc-from-patients-breath-using-canine-scent-detection-proof-of-concept-study
#16
Taya Kitiyakara, Susan Redmond, Nattawut Unwanatham, Sasivimol Rattanasiri, Ammarin Thakkinstian, Pongsatorn Tangtawee, Somkit Mingphruedhi, Abhasnee Sobhonslidsuk, Pongphob Intaraprasong, Chomsri Kositchaiwat
Patients with hepatocellular carcinomas (HCC) have poor outcomes as a result of late detection of disease. We investigated the possibility of using smell detection by dogs for detecting HCC from breaths of patients. Patients' whose diagnosis of HCC was confirmed histologically or radiologically according to the American Association for the study of the Liver (AASLD) criteria had breaths collected using facemasks and transported to the study test site. One golden retriever was trained to detect HCC with positive feedback using known samples of HCC and healthy controls in a step-wise manner...
June 26, 2017: Journal of Breath Research
https://www.readbyqxmd.com/read/28635619/on-the-importance-of-accurate-quantification-of-individual-volatile-metabolites-in-exhaled-breath
#17
David Smith, Patrik Spanel
It is argued that shortcomings of certain approaches to breath analysis research based on superficial interpretation of non-quantitative data are inadvertently inhibiting the progression of non-invasive breath analysis into clinical practice. The objective of this perspective is to suggest more clinically profitable approaches to breath research. Thus, following a discourse on the challenges and expectations in breath research, a brief indication is given of the analytical techniques currently used for the analysis of very humid exhaled breath...
June 21, 2017: Journal of Breath Research
https://www.readbyqxmd.com/read/28631618/exhaled-carbon-monoxide-is-correlated-with-ischemia-reperfusion-injuries-during-ex-vivo-lung-perfusion-in-pigs
#18
Maxime Maignan, Stéphane Gennai, Guillaume Debaty, Daniele Romanini, Marie Hélène Schmidt, Vivien Brenckmann, Angélique Brouta, Irène Ventrillard, Raphael Briot
Measurement of exhaled carbon monoxide (eCO) might help in the selection of lung grafts during ex vivo lung perfusion since its endogenous production is increased under ischemia reperfusion. The objective of this study was to measure eCO variations depending on the extent of lung ischemia reperfusion injuries. Using a porcine model and a laser spectrometer instrument, eCO was measured during ex vivo lung perfusion. eCO was compared after 30 min (D0) or 24 h (D1) of cold ischemia. The ability of eCO to distinguish lungs deemed suitable for transplantation was evaluated...
June 20, 2017: Journal of Breath Research
https://www.readbyqxmd.com/read/28612760/effects-of-growth-and-aging-on-the-reference-values-of-pulmonary-nitric-oxide-dynamics-in-healthy-subjects
#19
Marieann Högman, Alexandra Thornadtsson, Per Liv, Thong Hua-Huy, Anh-Tuan Dinh-Xuan, Ellen Tufvesson, Holger Dressel, Christer Janson, Kirsi Koskela, Panu Oksa, Riitta Sauni, Jukka Uitti, Eeva Moilanen, Lauri Lehtimäki
The lung just like all other organs is affected by age. The lung matures by the age of 20 and age related changes starts around middle age, 40-50 years. Exhaled nitric oxide (F<sub></sub>E<sub></sub>NO) has been shown to be age, height and gender dependent. We hypothesize that the nitric oxide (NO) parameters alveolar NO (C<sub>A</sub>NO), airway flux (J<sub>aw</sub>NO), airway diffusing capacity (D<sub>aw</sub>NO) and airway wall content (C<sub>aw</sub>NO), will also demonstrate this dependence...
June 14, 2017: Journal of Breath Research
https://www.readbyqxmd.com/read/28592704/the-added-value-of-exhaled-breath-temperature-in-respiratory-medicine
#20
Todor A Popov, Tanya Kralimarkova, Marina Labor, Davor Plavec
Recognition of the huge economic burden chronic respiratory diseases pose for society motivated fundamental and clinical research leading to insight into the role of airway inflammation in various disease entities and their phenotypes. However, no easy, cheap and patient-friendly methods to assess it have found a place in routine clinical practice. Measurement of exhaled breath temperature (EBT) has been suggested as a non-invasive method to detect inflammatory processes in the airways as a result of increased blood flow within the airway walls...
June 8, 2017: Journal of Breath Research
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