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Alateeq R, Akhtar A, De Luca SN, Chan SMH, Vlahos R. Apocynin Prevents Cigarette Smoke-Induced Anxiety-Like Behavior and Preserves Microglial Profiles in Male Mice. Antioxidants (Basel) 2024; 13:855. [PMID: 39061923 PMCID: PMC11274253 DOI: 10.3390/antiox13070855] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2024] [Revised: 07/12/2024] [Accepted: 07/12/2024] [Indexed: 07/28/2024] Open
Abstract
Chronic obstructive pulmonary disease (COPD) is the third leading cause of death globally and is primarily caused by cigarette smoking (CS). Neurocognitive comorbidities such as anxiety and cognitive impairments are common among people with COPD. CS-induced lung inflammation and oxidative stress may "spill-over" into the systemic circulation, driving the onset of these comorbidities. We investigated whether a prophylactic treatment with the NADPH Oxidase 2 (NOX2) inhibitor, apocynin, could prevent CS-induced neurocognitive impairments. Adult male BALB/c mice were exposed to CS (9 cigarettes/day, 5 days/week) or room air (sham) for 8 weeks with co-administration of apocynin (5 mg/kg, intraperitoneal injection once daily) or vehicle (0.01% DMSO in saline). Following 7 weeks of CS exposure, mice underwent behavioral testing to assess recognition and spatial memory (novel object recognition and Y maze, respectively) and anxiety-like behaviors (open field and elevated plus maze). Mice were then euthanized, and blood, lungs, and brains were collected. Apocynin partially improved CS-induced lung neutrophilia and reversed systemic inflammation (C-reactive protein) and oxidative stress (malondialdehyde). Apocynin exerted an anxiolytic effect in CS-exposed mice, which was associated with restored microglial profiles within the amygdala and hippocampus. Thus, targeting oxidative stress using apocynin can alleviate anxiety-like behaviors and could represent a novel strategy for managing COPD-related anxiety disorders.
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Affiliation(s)
| | | | | | | | - Ross Vlahos
- Respiratory Research Group, Centre for Respiratory Science and Health, School of Health and Biomedical Sciences, RMIT University, Bundoora, Melbourne, VIC 3083, Australia; (R.A.); (A.A.); (S.N.D.L.)
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2
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Mou K, Chan SMH, Vlahos R. Musculoskeletal crosstalk in chronic obstructive pulmonary disease and comorbidities: Emerging roles and therapeutic potentials. Pharmacol Ther 2024; 257:108635. [PMID: 38508342 DOI: 10.1016/j.pharmthera.2024.108635] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2023] [Revised: 02/13/2024] [Accepted: 03/11/2024] [Indexed: 03/22/2024]
Abstract
Chronic Obstructive Pulmonary Disease (COPD) is a multifaceted respiratory disorder characterized by progressive airflow limitation and systemic implications. It has become increasingly apparent that COPD exerts its influence far beyond the respiratory system, extending its impact to various organ systems. Among these, the musculoskeletal system emerges as a central player in both the pathogenesis and management of COPD and its associated comorbidities. Muscle dysfunction and osteoporosis are prevalent musculoskeletal disorders in COPD patients, leading to a substantial decline in exercise capacity and overall health. These manifestations are influenced by systemic inflammation, oxidative stress, and hormonal imbalances, all hallmarks of COPD. Recent research has uncovered an intricate interplay between COPD and musculoskeletal comorbidities, suggesting that muscle and bone tissues may cross-communicate through the release of signalling molecules, known as "myokines" and "osteokines". We explored this dynamic relationship, with a particular focus on the role of the immune system in mediating the cross-communication between muscle and bone in COPD. Moreover, we delved into existing and emerging therapeutic strategies for managing musculoskeletal disorders in COPD. It underscores the development of personalized treatment approaches that target both the respiratory and musculoskeletal aspects of COPD, offering the promise of improved well-being and quality of life for individuals grappling with this complex condition. This comprehensive review underscores the significance of recognizing the profound impact of COPD on the musculoskeletal system and its comorbidities. By unravelling the intricate connections between these systems and exploring innovative treatment avenues, we can aspire to enhance the overall care and outcomes for COPD patients, ultimately offering hope for improved health and well-being.
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Affiliation(s)
- Kevin Mou
- Centre for Respiratory Science and Health, School of Health & Biomedical Sciences, RMIT University, Melbourne, VIC, Australia
| | - Stanley M H Chan
- Centre for Respiratory Science and Health, School of Health & Biomedical Sciences, RMIT University, Melbourne, VIC, Australia
| | - Ross Vlahos
- Centre for Respiratory Science and Health, School of Health & Biomedical Sciences, RMIT University, Melbourne, VIC, Australia.
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3
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Seo YS, Park JM, Kim JH, Lee MY. Cigarette Smoke-Induced Reactive Oxygen Species Formation: A Concise Review. Antioxidants (Basel) 2023; 12:1732. [PMID: 37760035 PMCID: PMC10525535 DOI: 10.3390/antiox12091732] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2023] [Revised: 08/28/2023] [Accepted: 09/05/2023] [Indexed: 09/29/2023] Open
Abstract
Smoking is recognized as a significant risk factor for numerous disorders, including cardiovascular diseases, respiratory conditions, and various forms of cancer. While the exact pathogenic mechanisms continue to be explored, the induction of oxidative stress via the production of excess reactive oxygen species (ROS) is widely accepted as a primary molecular event that predisposes individuals to these smoking-related ailments. This review focused on how cigarette smoke (CS) promotes ROS formation rather than the pathophysiological repercussions of ROS and oxidative stress. A comprehensive analysis of existing studies revealed the following key ways through which CS imposes ROS burden on biological systems: (1) ROS, as well as radicals, are intrinsically present in CS, (2) CS constituents generate ROS through chemical reactions with biomolecules, (3) CS stimulates cellular ROS sources to enhance production, and (4) CS disrupts the antioxidant system, aggravating the ROS generation and its functions. While the evidence supporting these mechanisms is chiefly based on in vitro and animal studies, the direct clinical relevance remains to be fully elucidated. Nevertheless, this understanding is fundamental for deciphering molecular events leading to oxidative stress and for developing intervention strategies to counter CS-induced oxidative stress.
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Affiliation(s)
| | | | | | - Moo-Yeol Lee
- BK21 FOUR Team and Integrated Research Institute for Drug Development, College of Pharmacy, Dongguk University, Goyang-si 10326, Gyeonggi-do, Republic of Korea; (Y.-S.S.); (J.-M.P.); (J.-H.K.)
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4
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Wu P, Rybin D, Bielak LF, Feitosa MF, Franceschini N, Li Y, Lu Y, Marten J, Musani SK, Noordam R, Raghavan S, Rose LM, Schwander K, Smith AV, Tajuddin SM, Vojinovic D, Amin N, Arnett DK, Bottinger EP, Demirkan A, Florez JC, Ghanbari M, Harris TB, Launer LJ, Liu J, Liu J, Mook-Kanamori DO, Murray AD, Nalls MA, Peyser PA, Uitterlinden AG, Voortman T, Bouchard C, Chasman D, Correa A, de Mutsert R, Evans MK, Gudnason V, Hayward C, Kao L, Kardia SLR, Kooperberg C, Loos RJF, Province MM, Rankinen T, Redline S, Ridker PM, Rotter JI, Siscovick D, Smith BH, van Duijn C, Zonderman AB, Rao DC, Wilson JG, Dupuis J, Meigs JB, Liu CT, Vassy JL. Smoking-by-genotype interaction in type 2 diabetes risk and fasting glucose. PLoS One 2020; 15:e0230815. [PMID: 32379818 PMCID: PMC7205201 DOI: 10.1371/journal.pone.0230815] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2019] [Accepted: 03/09/2020] [Indexed: 02/07/2023] Open
Abstract
Smoking is a potentially causal behavioral risk factor for type 2 diabetes (T2D), but not all smokers develop T2D. It is unknown whether genetic factors partially explain this variation. We performed genome-environment-wide interaction studies to identify loci exhibiting potential interaction with baseline smoking status (ever vs. never) on incident T2D and fasting glucose (FG). Analyses were performed in participants of European (EA) and African ancestry (AA) separately. Discovery analyses were conducted using genotype data from the 50,000-single-nucleotide polymorphism (SNP) ITMAT-Broad-CARe (IBC) array in 5 cohorts from from the Candidate Gene Association Resource Consortium (n = 23,189). Replication was performed in up to 16 studies from the Cohorts for Heart Aging Research in Genomic Epidemiology Consortium (n = 74,584). In meta-analysis of discovery and replication estimates, 5 SNPs met at least one criterion for potential interaction with smoking on incident T2D at p<1x10-7 (adjusted for multiple hypothesis-testing with the IBC array). Two SNPs had significant joint effects in the overall model and significant main effects only in one smoking stratum: rs140637 (FBN1) in AA individuals had a significant main effect only among smokers, and rs1444261 (closest gene C2orf63) in EA individuals had a significant main effect only among nonsmokers. Three additional SNPs were identified as having potential interaction by exhibiting a significant main effects only in smokers: rs1801232 (CUBN) in AA individuals, rs12243326 (TCF7L2) in EA individuals, and rs4132670 (TCF7L2) in EA individuals. No SNP met significance for potential interaction with smoking on baseline FG. The identification of these loci provides evidence for genetic interactions with smoking exposure that may explain some of the heterogeneity in the association between smoking and T2D.
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Affiliation(s)
- Peitao Wu
- Department of Biostatistics, Boston University School of Public Health, Boston, Massachusetts, MA, United States of America
| | - Denis Rybin
- Department of Biostatistics, Boston University School of Public Health, Boston, Massachusetts, MA, United States of America
| | - Lawrence F. Bielak
- Department of Epidemiology, School of Public Health, University of Michigan, Ann Arbor, MI, United States of America
| | - Mary F. Feitosa
- Division of Statistical Genomics, Department of Genetics, Washington University School of Medicine, St. Louis, MO, United States of America
| | - Nora Franceschini
- University of North Carolina, Chapel Hill, NC, United States of America
| | - Yize Li
- Division of Biostatistics, Washington University School of Medicine, St. Louis, Missouri, United States of America
| | - Yingchang Lu
- The Charles Bronfman Institute for Personalized Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, United States of America
| | - Jonathan Marten
- MRC Human Genetics Unit, MRC Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, United Kingdom
| | - Solomon K. Musani
- Jackson Heart Study, University of Mississippi Medical Center, MS, United States of America
| | - Raymond Noordam
- Department of Internal Medicine, Section of Gerontology and Geriatrics, Leiden University Medical Center, Leiden, the Netherlands
| | - Sridharan Raghavan
- Section of Hospital Medicine, Veterans Affairs Eastern Colorado Healthcare System, Denver, CO, United States of America
- Division of General Internal Medicine, University of Colorado School of Medicine, Aurora, CO, United States of America
- Colorado Cardiovascular Outcomes Research Consortium, Aurora, CO, United States of America
| | - Lynda M. Rose
- Division of Preventive Medicine, Brigham and Women's Hospital, Boston, MA, United States of America
| | - Karen Schwander
- Division of Biostatistics, Washington University School of Medicine, St. Louis, Missouri, United States of America
| | - Albert V. Smith
- Icelandic Heart Association, Kopavogur, Iceland
- Faculty of Medicine, University of Iceland, Reykjavik, Iceland
| | - Salman M. Tajuddin
- Laboratory of Epidemiology and Population Science, National Institute on Aging, National Institutes of Health, Baltimore, MD, United States of America
| | - Dina Vojinovic
- Department of Epidemiology, Erasmus University Medical Center, Rotterdam, The Netherlands
| | - Najaf Amin
- Department of Epidemiology, Erasmus University Medical Center, Rotterdam, The Netherlands
| | - Donna K. Arnett
- Dean's Office, University of Kentucky College of Public Health, Lexington, Kentucky, United States of America
| | - Erwin P. Bottinger
- The Charles Bronfman Institute for Personalized Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, United States of America
| | - Ayse Demirkan
- Department of Epidemiology, Erasmus University Medical Center, Rotterdam, The Netherlands
| | - Jose C. Florez
- Diabetes Unit and Center for Genomic Medicine, Massachusetts General Hospital, Massachusetts General Hospital, Boston, MA, United States of America
- Programs in Metabolism and Medical & Population Genetics, Broad Institute, Cambridge, MA, United States of America
- Department of Medicine, Harvard Medical School, Boston, MA, United States of America
| | - Mohsen Ghanbari
- Department of Epidemiology, Erasmus University Medical Center, Rotterdam, The Netherlands
- Department of Genetics, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Tamara B. Harris
- Laboratory of Epidemiology and Population Sciences, National Institute on Aging, Intramural Research Program, National Institutes of Health, Bethesda, MD, United States of America
| | - Lenore J. Launer
- Laboratory of Epidemiology and Population Sciences, National Institute on Aging, Intramural Research Program, National Institutes of Health, Bethesda, MD, United States of America
| | - Jingmin Liu
- Division of Public Health Sciences, Fred Hutchinson Cancer Research Center, Seattle, WA, United States of America
| | - Jun Liu
- Department of Epidemiology, Erasmus University Medical Center, Rotterdam, The Netherlands
| | - Dennis O. Mook-Kanamori
- Department of Clinical Epidemiology, Leiden University Medical Center, Leiden, The Netherlands
- Department of Public Health and Primary Care, Leiden University Medical Center, Leiden, The Netherlands
| | - Alison D. Murray
- The Institute of Medical Sciences, Aberdeen Biomedical Imaging Centre, University of Aberdeen, Aberdeen, United Kingdom
| | - Mike A. Nalls
- Laboratory of Neurogenetics, National Institute on Aging, National Institutes of Health, Bethesda, MD, United States of America
- Data Tecnica International LLC, Glen Echo, MD, United States of America
| | - Patricia A. Peyser
- Department of Epidemiology, School of Public Health, University of Michigan, Ann Arbor, MI, United States of America
| | - André G. Uitterlinden
- Department of Internal Medicine, Erasmus University Medical Center, Rotterdam, The Netherlands
| | - Trudy Voortman
- Department of Epidemiology, Erasmus University Medical Center, Rotterdam, The Netherlands
| | - Claude Bouchard
- Human Genomics Laboratory, Pennington Biomedical Research Center, Louisiana State University System, Baton Rouge, LA, United States of America
| | - Daniel Chasman
- Division of Preventive Medicine, Brigham and Women's Hospital, Boston, MA, United States of America
- Harvard Medical School, Boston, MA, United States of America
| | - Adolfo Correa
- Department of Medicine, University of Mississippi Medical Center, Jackson, MS, United States of America
| | - Renée de Mutsert
- Department of Clinical Epidemiology, Leiden University Medical Center, Leiden, The Netherlands
| | - Michele K. Evans
- Laboratory of Epidemiology and Population Science, National Institute on Aging, National Institutes of Health, Baltimore, MD, United States of America
| | - Vilmundur Gudnason
- Icelandic Heart Association, Kopavogur, Iceland
- University of Iceland, Reykjavik, Iceland
| | - Caroline Hayward
- MRC Human Genetics Unit, MRC Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, United Kingdom
| | - Linda Kao
- Department of Medicine, School of Medicine, Johns Hopkins University, Baltimore, MD, United States of America
- Welch Center for Prevention, Epidemiology and Clinical Research, Johns Hopkins University, Baltimore, MD, United States of America
- Department of Epidemiology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, United States of America
| | - Sharon L. R. Kardia
- Department of Epidemiology, School of Public Health, University of Michigan, Ann Arbor, MI, United States of America
| | - Charles Kooperberg
- Division of Public Health Sciences, Fred Hutchinson Cancer Research Center, Seattle, WA, United States of America
| | - Ruth J. F. Loos
- The Charles Bronfman Institute for Personalized Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, United States of America
- The Mindich Child Health and Development Institute, Ichan School of Medicine at Mount Sinai, New York, NY, United States of America
| | - Michael M. Province
- Division of Statistical Genomics, Department of Genetics, Washington University School of Medicine, St. Louis, MO, United States of America
| | - Tuomo Rankinen
- Human Genomics Laboratory, Pennington Biomedical Research Center, Louisiana State University System, Baton Rouge, LA, United States of America
| | - Susan Redline
- Harvard Medical School, Boston, MA, United States of America
- Departments of Medicine, Brigham and Women's Hospital, Boston, MA, United States of America
- Beth Israel Deaconess Medical Center, Boston, MA, United States of America
| | - Paul M. Ridker
- Division of Preventive Medicine, Brigham and Women's Hospital, Boston, MA, United States of America
- Harvard Medical School, Boston, MA, United States of America
| | - Jerome I. Rotter
- The Institute for Translational Genomics and Population Sciences, Department of Pediatrics, The Lundquist Institute for Biomedical Innovation at Harbor-UCLA Medical Center, Torrance, CA, United States of America
| | - David Siscovick
- The New York Academy of Medicine, New York, NY, United States of America
| | - Blair H. Smith
- Division of Population Health and Genomics, University of Dundee, Dundee, United Kingdom
| | - Cornelia van Duijn
- Department of Epidemiology, Erasmus University Medical Center, Rotterdam, The Netherlands
| | - Alan B. Zonderman
- Laboratory of Epidemiology and Population Science, National Institute on Aging, National Institutes of Health, Baltimore, MD, United States of America
| | - D. C. Rao
- Division of Biostatistics, Washington University School of Medicine, St. Louis, MO, United States of America
| | - James G. Wilson
- Department of Medicine, University of Mississippi Medical Center, Jackson, MS, United States of America
| | - Josée Dupuis
- Department of Biostatistics, Boston University School of Public Health, Boston, Massachusetts, MA, United States of America
- The National Heart, Lung, and Blood Institute’s Framingham Heart Study, Framingham, MA, United States of America
| | - James B. Meigs
- Programs in Metabolism and Medical & Population Genetics, Broad Institute, Cambridge, MA, United States of America
- Division of General Internal Medicine Division, Massachusetts General Hospital, Boston, MA, United States of America
- Department of Medicine, Harvard Medical School, Boston, MA, United States of America
| | - Ching-Ti Liu
- Department of Biostatistics, Boston University School of Public Health, Boston, Massachusetts, MA, United States of America
| | - Jason L. Vassy
- Department of Medicine, Harvard Medical School, Boston, MA, United States of America
- VA Boston Healthcare System, Boston, MA, United States of America
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5
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Costa ED, Silva JF, Garcia DC, Wainstein AJ, Rezende BA, Tostes RC, Teixeira MM, Cortes SF, Lemos VS. Decreased expression of neuronal nitric oxide synthase contributes to the endothelial dysfunction associated with cigarette smoking in human. Nitric Oxide 2020; 98:20-28. [DOI: 10.1016/j.niox.2020.02.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2019] [Revised: 02/01/2020] [Accepted: 02/18/2020] [Indexed: 12/27/2022]
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6
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Brassington K, Selemidis S, Bozinovski S, Vlahos R. New frontiers in the treatment of comorbid cardiovascular disease in chronic obstructive pulmonary disease. Clin Sci (Lond) 2019; 133:885-904. [PMID: 30979844 PMCID: PMC6465303 DOI: 10.1042/cs20180316] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2018] [Revised: 03/26/2019] [Accepted: 04/01/2019] [Indexed: 02/06/2023]
Abstract
Chronic obstructive pulmonary disease (COPD) is a disease characterised by persistent airflow limitation that is not fully reversible and is currently the fourth leading cause of death globally. It is now well established that cardiovascular-related comorbidities contribute to morbidity and mortality in COPD, with approximately 50% of deaths in COPD patients attributed to a cardiovascular event (e.g. myocardial infarction). Cardiovascular disease (CVD) and COPD share various risk factors including hypertension, sedentarism, smoking and poor diet but the underlying mechanisms have not been fully established. However, there is emerging and compelling experimental and clinical evidence to show that increased oxidative stress causes pulmonary inflammation and that the spill over of pro-inflammatory mediators from the lungs into the systemic circulation drives a persistent systemic inflammatory response that alters blood vessel structure, through vascular remodelling and arterial stiffness resulting in atherosclerosis. In addition, regulation of endothelial-derived vasoactive substances (e.g. nitric oxide (NO)), which control blood vessel tone are altered by oxidative damage of vascular endothelial cells, thus promoting vascular dysfunction, a key driver of CVD. In this review, the detrimental role of oxidative stress in COPD and comorbid CVD are discussed and we propose that targeting oxidant-dependent mechanisms represents a novel strategy in the treatment of COPD-associated CVD.
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Affiliation(s)
- Kurt Brassington
- School of Health and Biomedical Sciences, RMIT University, Bundoora, VIC 3083, Australia
| | - Stavros Selemidis
- School of Health and Biomedical Sciences, RMIT University, Bundoora, VIC 3083, Australia
| | - Steven Bozinovski
- School of Health and Biomedical Sciences, RMIT University, Bundoora, VIC 3083, Australia
| | - Ross Vlahos
- School of Health and Biomedical Sciences, RMIT University, Bundoora, VIC 3083, Australia
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7
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KAWASAKI A, YASUDA M, MAWATARI KI, FUKUUCHI T, YAMAOKA N, KANEKO K, IIJIMA R, YUI S, SATOH M, NAKAGOMI K. Sensitive Analysis of Sialic Acid and Related Compound by Hydrophilic Interaction Liquid Chromatography Using Fluorescence Detection after Derivatization with DBD-PZ. ANAL SCI 2018; 34:841-844. [DOI: 10.2116/analsci.18n001] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
| | | | | | | | | | | | | | - Satoru YUI
- Faculty of Pharma-Science, Teikyo University
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8
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Vasanthi Bathrinarayanan P, Brown JEP, Marshall LJ, Leslie LJ. An investigation into E-cigarette cytotoxicity in-vitro using a novel 3D differentiated co-culture model of human airways. Toxicol In Vitro 2018; 52:255-264. [PMID: 29940344 DOI: 10.1016/j.tiv.2018.06.020] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2018] [Revised: 06/20/2018] [Accepted: 06/21/2018] [Indexed: 12/21/2022]
Abstract
Currently there is a lack of consensus on the possible adverse health effects of E-cigarettes (ECs). Important factors including cell model employed and exposure method determine the physiological relevance of EC studies. The present study aimed to evaluate EC cytotoxicity using a physiologically relevant in-vitro multicellular model of human airways. Human bronchial epithelial cells (CALU-3) and pulmonary fibroblasts (MRC-5) were co-cultured at air-liquid-interface for 11-14 days post which they were exposed to whole cigarette smoke (WCS) or EC vapour (ECV) at standard ISO-3308 regime for 7 m using a bespoke aerosol delivery system. ECV effects were further investigated at higher exposure times (1 h-6 h). Results showed that while WCS significantly reduced cell viability after 7 m, ECV decreased cell viability only at exposure times higher than 3 h. Furthermore, ECV caused elevated IL-6 and IL-8 production despite reduced cell viability. ECV exposure also produced a marked increase in oxidative stress. Finally, WCS but not ECV exposure induced caspase 3/7 activation, suggesting a caspase independent death of ECV exposed cells. Overall, our results indicate that prolonged ECV exposure (≥3 h) has a significant impact on pro-inflammatory mediators' production, oxidative stress and cell viability but not caspase 3/7 activity.
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Affiliation(s)
- Pranav Vasanthi Bathrinarayanan
- Aston Institute of Materials Research, School of Engineering and Applied Science, Aston University, Birmingham B4 7ET, United Kingdom
| | - James E P Brown
- School of Life and Health Sciences, Aston University, Birmingham B4 7ET, United Kingdom; Aston Medical Research Institute, Aston University, Birmingham B4 7ET, United Kingdom
| | - Lindsay J Marshall
- Research and Toxicology Department, Humane Society International, 5, Underwood Street, London, United Kingdom
| | - Laura J Leslie
- Aston Institute of Materials Research, School of Engineering and Applied Science, Aston University, Birmingham B4 7ET, United Kingdom.
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9
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Hecker L. Mechanisms and consequences of oxidative stress in lung disease: therapeutic implications for an aging populace. Am J Physiol Lung Cell Mol Physiol 2017; 314:L642-L653. [PMID: 29351446 DOI: 10.1152/ajplung.00275.2017] [Citation(s) in RCA: 80] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
The rapid expansion of the elderly population has led to the recent epidemic of age-related diseases, including increased incidence and mortality of chronic and acute lung diseases. Numerous studies have implicated aging and oxidative stress in the pathogenesis of various pulmonary diseases; however, despite recent advances in these fields, the specific contributions of aging and oxidative stress remain elusive. This review will discuss the consequences of aging on lung morphology and physiology, and how redox imbalance with aging contributes to lung disease susceptibility. Here, we focus on three lung diseases for which aging is a significant risk factor: acute respiratory distress syndrome (ARDS), chronic obstructive pulmonary disease (COPD), and idiopathic pulmonary fibrosis (IPF). Preclinical and clinical development for redox- and senescence-altering therapeutic strategies are discussed, as well as scientific advancements that may direct current and future therapeutic development. A deeper understanding of how aging impacts normal lung function, redox balance, and injury-repair processes will inspire the development of new therapies to prevent and/or reverse age-associated pulmonary diseases, and ultimately increase health span and longevity. This review is intended to encourage basic, clinical, and translational research that will bridge knowledge gaps at the intersection of aging, oxidative stress, and lung disease to fuel the development of more effective therapeutic strategies for lung diseases that disproportionately afflict the elderly.
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Affiliation(s)
- Louise Hecker
- Division of Pulmonary, Allergy and Critical Care and Sleep Medicine, University of Arizona , Tucson, Arizona and Southern Arizona Veterans Affairs Health Care System, Tucson, Arizona
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10
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Li X, Lai Y, Li J, Zou M, Zou C. Oxidative stress destabilizes protein arginine methyltransferase 4 via glycogen synthase kinase 3β to impede lung epithelial cell migration. Am J Physiol Cell Physiol 2017. [PMID: 28637674 DOI: 10.1152/ajpcell.00073.2017] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Oxidative stress impacts normal cellular function leading to the pathogenesis of various diseases including pulmonary illnesses. Protein arginine methyltransferase 4 (PRMT4) is critical for normal lung alveolar epithelial cell development; however, the regulation of PRMT4 within such pulmonary diseases has yet to be elucidated. Using biochemical approaches, we uncovered that peroxide (H2O2) treatment decreases PRMT4 protein stability in murine lung epithelial (MLE12) cells to impede cell migration. Protein kinase glycogen synthase kinase 3β (GSK-3β) interacts with PRMT4 and catalyzes PRMT4 T132 phosphorylation that protects PRMT4 from ubiquitin proteasomal degradation. H2O2 downregulates GSK-3β to reduce PRMT4 at protein level. PRMT4 promotes cell migration and H2O2 degrades PRMT4 to inhibit lung epithelial cell migration. These observations demonstrate that oxidative stress destabilizes PRMT4 via GSK-3β signaling to impede lung epithelial cell migration that may hinder the lung repair and regeneration process.
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Affiliation(s)
- Xiuying Li
- Acute Lung Injury Center of Excellence, Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania
| | - Yandong Lai
- Acute Lung Injury Center of Excellence, Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania
| | - Jin Li
- Acute Lung Injury Center of Excellence, Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania
| | - Mingyi Zou
- Acute Lung Injury Center of Excellence, Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania
| | - Chunbin Zou
- Acute Lung Injury Center of Excellence, Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania
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11
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COPD and stroke: are systemic inflammation and oxidative stress the missing links? Clin Sci (Lond) 2017; 130:1039-50. [PMID: 27215677 PMCID: PMC4876483 DOI: 10.1042/cs20160043] [Citation(s) in RCA: 119] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2016] [Accepted: 03/07/2016] [Indexed: 12/12/2022]
Abstract
Chronic obstructive pulmonary disease (COPD) is characterized by progressive airflow limitation and loss of lung function, and is currently the third largest cause of death in the world. It is now well established that cardiovascular-related comorbidities such as stroke contribute to morbidity and mortality in COPD. The mechanisms linking COPD and stroke remain to be fully defined but are likely to be interconnected. The association between COPD and stroke may be largely dependent on shared risk factors such as aging and smoking, or the association of COPD with traditional stroke risk factors. In addition, we propose that COPD-related systemic inflammation and oxidative stress may play important roles by promoting cerebral vascular dysfunction and platelet hyperactivity. In this review, we briefly discuss the pathogenesis of COPD, acute exacerbations of COPD (AECOPD) and cardiovascular comorbidities associated with COPD, in particular stroke. We also highlight and discuss the potential mechanisms underpinning the link between COPD and stroke, with a particular focus on the roles of systemic inflammation and oxidative stress.
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12
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Emerging therapies for the treatment of skeletal muscle wasting in chronic obstructive pulmonary disease. Pharmacol Ther 2016; 166:56-70. [DOI: 10.1016/j.pharmthera.2016.06.013] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/14/2016] [Indexed: 12/18/2022]
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13
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Aldakheel FM, Thomas PS, Bourke JE, Matheson MC, Dharmage SC, Lowe AJ. Relationships between adult asthma and oxidative stress markers and pH in exhaled breath condensate: a systematic review. Allergy 2016; 71:741-57. [PMID: 26896172 DOI: 10.1111/all.12865] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/15/2016] [Indexed: 01/02/2023]
Abstract
Oxidative stress has a recognized role in the pathophysiology of asthma. Recently, interest has increased in the assessment of pH and airway oxidative stress markers. Collection of exhaled breath condensate (EBC) and quantification of biomarkers in breath samples can potentially indicate lung disease activity and help in the study of airway inflammation, and asthma severity. Levels of oxidative stress markers in the EBC have been systematically evaluated in children with asthma; however, there is no such systematic review conducted for adult asthma. A systematic review of oxidative stress markers measured in EBC of adult asthma was conducted, and studies were identified by searching MEDLINE and SCOPUS databases. Sixteen papers met the inclusion criteria. Concentrations of exhaled hydrogen ions, nitric oxide products, hydrogen peroxide and 8-isoprostanes were generally elevated and related to lower lung function tests in adults with asthma compared to healthy subjects. Assessment of EBC markers may be a noninvasive approach to evaluate airway inflammation, exacerbations, and disease severity of asthma, and to monitor the effectiveness of anti-inflammatory treatment regimens. Longitudinal studies, using standardized analytical techniques for EBC collection, are required to establish reference values for the interpretation of EBC markers in the context of asthma.
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Affiliation(s)
- F. M. Aldakheel
- Allergy and Lung Health Unit; The University of Melbourne; Melbourne Australia
- Department of Clinical Laboratory Sciences; College of Applied Medical Sciences; King Saud University; Riyadh Saudi Arabia
| | - P. S. Thomas
- Department of Respiratory Medicine and Prince of Wales Hospital Clinical School; University of New South Wales; Sydney Australia
| | - J. E. Bourke
- Biomedicine Discovery Institute; Department of Pharmacology; Monash University; Clayton Australia
| | - M. C. Matheson
- Allergy and Lung Health Unit; The University of Melbourne; Melbourne Australia
- Murdoch Childrens Research Institute; Melbourne Australia
| | - S. C. Dharmage
- Allergy and Lung Health Unit; The University of Melbourne; Melbourne Australia
- Murdoch Childrens Research Institute; Melbourne Australia
| | - A. J. Lowe
- Allergy and Lung Health Unit; The University of Melbourne; Melbourne Australia
- Murdoch Childrens Research Institute; Melbourne Australia
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Smith KF, Quinn RL, Rahilly LJ. Biomarkers for differentiation of causes of respiratory distress in dogs and cats: Part 2--Lower airway, thromboembolic, and inflammatory diseases. J Vet Emerg Crit Care (San Antonio) 2016; 25:330-48. [PMID: 26040815 DOI: 10.1111/vec.12317] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2013] [Accepted: 03/22/2015] [Indexed: 01/08/2023]
Abstract
OBJECTIVES To review the current veterinary and relevant human literature regarding biomarkers of respiratory diseases leading to dyspnea and to summarize the availability, feasibility, and practicality of using respiratory biomarkers in the veterinary setting. DATA SOURCES Veterinary and human medical literature: original research articles, scientific reviews, consensus statements, and recent textbooks. HUMAN DATA SYNTHESIS Numerous biomarkers have been evaluated in people for discriminating respiratory disease processes with varying degrees of success. VETERINARY DATA SYNTHESIS Although biomarkers should not dictate clinical decisions in lieu of gold standard diagnostics, their use may be useful in directing care in the stabilization process. Serum immunoglobulins have shown promise as an indicator of asthma in cats. A group of biomarkers has also been evaluated in exhaled breath. Of these, hydrogen peroxide has shown the most potential as a marker of inflammation in asthma and potentially aspiration pneumonia, but methods for measurement are not standardized. D-dimers may be useful in screening for thromboembolic disease in dogs. There are a variety of markers of inflammation and oxidative stress, which are being evaluated for their ability to assess the severity and type of underlying disease process. Of these, amino terminal pro-C-type natriuretic peptide may be the most useful in determining if antibiotic therapy is warranted. Although critically evaluated for their use in respiratory disorders, many of the biomarkers which have been evaluated have been found to be affected by more than one type of respiratory or systemic disease. CONCLUSION At this time, there are point-of-care biomarkers that have been shown to reliably differentiate between causes of dyspnea in dogs and cats. Future clinical research is warranted to understand of how various diseases affect the biomarkers and more bedside tests for their utilization.
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Bozinovski S, Vlahos R, Anthony D, McQualter J, Anderson G, Irving L, Steinfort D. COPD and squamous cell lung cancer: aberrant inflammation and immunity is the common link. Br J Pharmacol 2016; 173:635-48. [PMID: 26013585 PMCID: PMC4742298 DOI: 10.1111/bph.13198] [Citation(s) in RCA: 79] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2015] [Revised: 04/30/2015] [Accepted: 05/14/2015] [Indexed: 12/25/2022] Open
Abstract
Cigarette smoking has reached epidemic proportions within many regions of the world and remains the highest risk factor for chronic obstructive pulmonary disease (COPD) and lung cancer. Squamous cell lung cancer is commonly detected in heavy smokers, where the risk of developing lung cancer is not solely defined by tobacco consumption. Although therapies that target common driver mutations in adenocarcinomas are showing some promise, they are proving ineffective in smoking-related squamous cell lung cancer. Since COPD is characterized by an excessive inflammatory and oxidative stress response, this review details how aberrant innate, adaptive and systemic inflammatory processes can contribute to lung cancer susceptibility in COPD. Activated leukocytes release increasing levels of proteases and free radicals as COPD progresses and tertiary lymphoid aggregates accumulate with increasing severity. Reactive oxygen species promote formation of reactive carbonyls that are not only tumourigenic through initiating DNA damage, but can directly alter the function of regulatory proteins involved in host immunity and tumour suppressor functions. Systemic inflammation is also markedly increased during infective exacerbations in COPD and the interplay between tumour-promoting serum amyloid A (SAA) and IL-17A is discussed. SAA is also an endogenous allosteric modifier of FPR2 expressed on immune and epithelial cells, and the therapeutic potential of targeting this receptor is proposed as a novel strategy for COPD-lung cancer overlap.
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Affiliation(s)
- Steven Bozinovski
- School of Health Sciences and Health Innovations Research Institute, RMIT University, Melbourne, Vic., Australia
- Lung Health Research Centre, Department of Pharmacology & Therapeutics, The University of Melbourne, Parkville, Vic., Australia
| | - Ross Vlahos
- School of Health Sciences and Health Innovations Research Institute, RMIT University, Melbourne, Vic., Australia
- Lung Health Research Centre, Department of Pharmacology & Therapeutics, The University of Melbourne, Parkville, Vic., Australia
| | - Desiree Anthony
- Lung Health Research Centre, Department of Pharmacology & Therapeutics, The University of Melbourne, Parkville, Vic., Australia
| | - Jonathan McQualter
- Lung Health Research Centre, Department of Pharmacology & Therapeutics, The University of Melbourne, Parkville, Vic., Australia
| | - Gary Anderson
- Lung Health Research Centre, Department of Pharmacology & Therapeutics, The University of Melbourne, Parkville, Vic., Australia
| | - Louis Irving
- Department of Respiratory Medicine, The Royal Melbourne Hospital, Parkville, Vic., Australia
| | - Daniel Steinfort
- Department of Respiratory Medicine, The Royal Melbourne Hospital, Parkville, Vic., Australia
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Li Z, Leung C, Gao F, Gu Z. Effects of Nanowire Length and Surface Roughness on the Electrochemical Sensor Properties of Nafion-Free, Vertically Aligned Pt Nanowire Array Electrodes. SENSORS 2015; 15:22473-89. [PMID: 26404303 PMCID: PMC4610575 DOI: 10.3390/s150922473] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/13/2015] [Revised: 08/15/2015] [Accepted: 08/31/2015] [Indexed: 01/22/2023]
Abstract
In this paper, vertically aligned Pt nanowire arrays (PtNWA) with different lengths and surface roughnesses were fabricated and their electrochemical performance toward hydrogen peroxide (H2O2) detection was studied. The nanowire arrays were synthesized by electroplating Pt in nanopores of anodic aluminum oxide (AAO) template. Different parameters, such as current density and deposition time, were precisely controlled to synthesize nanowires with different surface roughnesses and various lengths from 3 μm to 12 μm. The PtNWA electrodes showed better performance than the conventional electrodes modified by Pt nanowires randomly dispersed on the electrode surface. The results indicate that both the length and surface roughness can affect the sensing performance of vertically aligned Pt nanowire array electrodes. Generally, longer nanowires with rougher surfaces showed better electrochemical sensing performance. The 12 μm rough surface PtNWA presented the largest sensitivity (654 μA·mM−1·cm−2) among all the nanowires studied, and showed a limit of detection of 2.4 μM. The 12 μm rough surface PtNWA electrode also showed good anti-interference property from chemicals that are typically present in the biological samples such as ascorbic, uric acid, citric acid, and glucose. The sensing performance in real samples (river water) was tested and good recovery was observed. These Nafion-free, vertically aligned Pt nanowires with surface roughness control show great promise as versatile electrochemical sensors and biosensors.
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Affiliation(s)
- Zhiyang Li
- Department of Chemical Engineering, University of Massachusetts Lowell, One University Ave, Lowell, MA 01854, USA.
| | - Calvin Leung
- Department of Chemical Engineering, University of Massachusetts Lowell, One University Ave, Lowell, MA 01854, USA.
| | - Fan Gao
- Department of Chemical Engineering, University of Massachusetts Lowell, One University Ave, Lowell, MA 01854, USA.
| | - Zhiyong Gu
- Department of Chemical Engineering, University of Massachusetts Lowell, One University Ave, Lowell, MA 01854, USA.
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Kacprzak D, Pawliczak R. Does aspirin-induced oxidative stress cause asthma exacerbation? Arch Med Sci 2015; 11:494-504. [PMID: 26170841 PMCID: PMC4495142 DOI: 10.5114/aoms.2014.41960] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/07/2013] [Revised: 05/15/2013] [Accepted: 07/10/2013] [Indexed: 12/13/2022] Open
Abstract
Aspirin-induced asthma (AIA) is a distinct clinical syndrome characterized by severe asthma exacerbations after ingestion of aspirin or other non-steroidal anti-inflammatory drugs. The exact pathomechanism of AIA remains unknown, though ongoing research has shed some light. Recently, more and more attention has been focused on the role of aspirin in the induction of oxidative stress, especially in cancer cell systems. However, it has not excluded the similar action of aspirin in other inflammatory disorders such as asthma. Moreover, increased levels of 8-isoprostanes, reliable biomarkers of oxidative stress in expired breath condensate in steroid-naïve patients with AIA compared to AIA patients treated with steroids and healthy volunteers, has been observed. This review is an attempt to cover aspirin-induced oxidative stress action in AIA and to suggest a possible related pathomechanism.
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Affiliation(s)
- Dorota Kacprzak
- Department of Immunopathology, Division of Allergology, Immunology and Dermatology, Medical University of Lodz, Lodz, Poland
| | - Rafał Pawliczak
- Department of Immunopathology, Division of Allergology, Immunology and Dermatology, Medical University of Lodz, Lodz, Poland
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Vlahos R, Bozinovski S. Preclinical murine models of Chronic Obstructive Pulmonary Disease. Eur J Pharmacol 2015; 759:265-71. [PMID: 25818750 DOI: 10.1016/j.ejphar.2015.03.029] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2014] [Revised: 02/03/2015] [Accepted: 03/12/2015] [Indexed: 12/11/2022]
Abstract
Chronic Obstructive Pulmonary Disease (COPD) is a major incurable global health burden and is the 4th leading cause of death worldwide. It is believed that an exaggerated inflammatory response to cigarette smoke causes progressive airflow limitation. This inflammation, where macrophages, neutrophils and T lymphocytes are prominent, leads to oxidative stress, emphysema, small airway fibrosis and mucus hypersecretion. Much of the disease burden and health care utilisation in COPD is associated with the management of its comorbidities and infectious (viral and bacterial) exacerbations (AECOPD). Comorbidities, defined as other chronic medical conditions, in particular skeletal muscle wasting and cardiovascular disease markedly impact on disease morbidity, progression and mortality. The mechanisms and mediators underlying COPD and its comorbidities are poorly understood and current COPD therapy is relatively ineffective. Thus, there is an obvious need for new therapies that can prevent the induction and progression of COPD and effectively treat AECOPD and comorbidities of COPD. Given that access to COPD patients can be difficult and that clinical samples often represent a "snapshot" at a particular time in the disease process, many researchers have used animal modelling systems to explore the mechanisms underlying COPD, AECOPD and comorbidities of COPD with the goal of identifying novel therapeutic targets. This review highlights the mouse models used to define the cellular, molecular and pathological consequences of cigarette smoke exposure and the recent advances in modelling infectious exacerbations and comorbidities of COPD.
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Affiliation(s)
- Ross Vlahos
- School of Health Sciences, Health Innovations Research Institute, RMIT University, PO Box 71, Bundoora, VIC 3083, Australia; Lung Health Research Centre, Department of Pharmacology & Therapeutics, The University of Melbourne, Parkville, VIC 3010, Australia.
| | - Steven Bozinovski
- School of Health Sciences, Health Innovations Research Institute, RMIT University, PO Box 71, Bundoora, VIC 3083, Australia; Lung Health Research Centre, Department of Pharmacology & Therapeutics, The University of Melbourne, Parkville, VIC 3010, Australia
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19
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Vergara D, Ávila D, Escobar E, Carrasco-Pozo C, Sánchez A, Gotteland M. The intake of maqui (Aristotelia chilensis) berry extract normalizes H2O2 and IL-6 concentrations in exhaled breath condensate from healthy smokers - an explorative study. Nutr J 2015; 14:27. [PMID: 25889552 PMCID: PMC4369103 DOI: 10.1186/s12937-015-0008-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2014] [Accepted: 02/13/2015] [Indexed: 01/29/2023] Open
Abstract
BACKGROUND Respiratory diseases are associated with pulmonary oxidative stress and inflammatory processes. Though studies in animal models suggest that dietary polyphenols improve lung injury, no intervention studies were carried out in humans. The aim of this study was to determine whether the intake of an anthocyanin-rich maqui extract improved H2O2 and IL-6 concentrations in exhaled breath condensates (EBCs) from asymptomatic smokers. FINDINGS 15 asymptomatic smokers with mild cigarette smoking (3 pack-year [2.4 - 7.7]) (mean [CI95%]) were recruited in this exploratory longitudinal study. They ingested 2 g of maqui extract (polyphenol content = 5.18 ± 2.00 g GAE/100 g; FRAP value = 27.1 ± 2.0 mmol Fe(++)/100 g), twice daily for two weeks. EBCs were collected before and after treatment and the changes in H2O2 and IL-6 concentrations were determined by fluorimetry and Elisa, respectively. The EBC contents of H2O2 and IL-6 H2O2 before and after treatment in smokers were also compared with those determined in single EBC samples from 8 healthy non-smokers subjects. At baseline, the H2O2 concentrations were higher and those of IL-6 lower in the smokers than in the non-smokers. Maqui extract significantly decreased H2O2 (p < 0.0002) and increased IL-6 (p < 0.004) in the EBC from smokers. The EBC concentrations of H2O2 and IL-6 after maqui administration did not differ between smokers and non-smokers. CONCLUSIONS Maqui extract normalizes IL-6 and H2O2 concentrations in EBC from humans with mild smoking habits. If confirmed, these results suggest that dietary polyphenols might be considered as an interesting alternative for the dietary management of respiratory disorders.
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Affiliation(s)
- Daniela Vergara
- Department of Nutrition, Faculty of Medicine, University of Chile, Santiago, Independencia 1027, Independencia, Santiago, Chile.
| | - Daniela Ávila
- Department of Nutrition, Faculty of Medicine, University of Chile, Santiago, Independencia 1027, Independencia, Santiago, Chile.
| | - Elizabeth Escobar
- Department of Nutrition, Faculty of Medicine, University of Chile, Santiago, Independencia 1027, Independencia, Santiago, Chile.
| | - Catalina Carrasco-Pozo
- Department of Nutrition, Faculty of Medicine, University of Chile, Santiago, Independencia 1027, Independencia, Santiago, Chile.
| | - Andrés Sánchez
- Department of Nutrition, Faculty of Medicine, University of Chile, Santiago, Independencia 1027, Independencia, Santiago, Chile.
| | - Martin Gotteland
- Department of Nutrition, Faculty of Medicine, University of Chile, Santiago, Independencia 1027, Independencia, Santiago, Chile.
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20
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Corradi M, Poli D, Banda I, Bonini S, Mozzoni P, Pinelli S, Alinovi R, Andreoli R, Ampollini L, Casalini A, Carbognani P, Goldoni M, Mutti A. Exhaled breath analysis in suspected cases of non-small-cell lung cancer: a cross-sectional study. J Breath Res 2015; 9:027101. [PMID: 25634546 DOI: 10.1088/1752-7155/9/2/027101] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Lung cancer is one of the most frequently diagnosed cancers worldwide and is still the leading cause of cancer-related deaths. There is a considerable interest in finding diagnostic methods in the disease's earliest stages. A complementary approach to imaging techniques could be provided by exhaled breath gas phase and exhaled breath condensate (EBC) analysis. The aim of this study was to quantify various biomarkers in the exhaled breath gas phase and EBC in suspected cases of non-small-cell lung cancer (NSCLC). The study involved 138 subjects with suspected lung cancer, 71 of whom had a subsequent diagnosis of NSCLC. The diagnostic power of a combination of hydrogen peroxide (H₂O₂)-EBC, and exhaled pentane, 2-methyl pentane, hexane, ethyl benzene, heptanal, trans-2-nonenal in distinguishing NSCLC and non-NSCLC subjects was poor-to-fair (area under the curve (AUC) = 0.68), similar to that of smoking history alone (expressed as pack-years, AUC = 0.70); a further improvement was observed when smoking history was combined with exhaled compounds (AUC = 0.80). The diagnostic power was increased in those patients with little or no past smoke exposure (AUC = 0.92) or where past smoke exposure was up to 30 pack-years (AUC = 0.85). Exhaled substances had a good accuracy in discriminating suspected cancerous cases only in those subjects with a modest smoking history (≤ 30 pack-years), but the inclusion of other exhaled biomarkers may increase the overall accuracy, regardless of tobacco smoke.
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Affiliation(s)
- M Corradi
- Department of Clinical and Experimental Medicine, University of Parma, Parma, Italy
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Vlahos R, Bozinovski S. Recent advances in pre-clinical mouse models of COPD. Clin Sci (Lond) 2014; 126:253-65. [PMID: 24144354 PMCID: PMC3878607 DOI: 10.1042/cs20130182] [Citation(s) in RCA: 99] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2013] [Revised: 07/17/2013] [Accepted: 08/01/2013] [Indexed: 02/06/2023]
Abstract
COPD (chronic obstructive pulmonary disease) is a major incurable global health burden and will become the third largest cause of death in the world by 2020. It is currently believed that an exaggerated inflammatory response to inhaled irritants, in particular cigarette smoke, causes progressive airflow limitation. This inflammation, where macrophages, neutrophils and T-cells are prominent, leads to oxidative stress, emphysema, small airways fibrosis and mucus hypersecretion. The mechanisms and mediators that drive the induction and progression of chronic inflammation, emphysema and altered lung function are poorly understood. Current treatments have limited efficacy in inhibiting chronic inflammation, do not reverse the pathology of disease and fail to modify the factors that initiate and drive the long-term progression of disease. Therefore there is a clear need for new therapies that can prevent the induction and progression of COPD. Animal modelling systems that accurately reflect disease pathophysiology continue to be essential to the development of new therapies. The present review highlights some of the mouse models used to define the cellular, molecular and pathological consequences of cigarette smoke exposure and whether they can be used to predict the efficacy of new therapeutics for COPD.
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Key Words
- acute exacerbations of chronic obstructive pulmonary disease (aecopd)
- chronic obstructive pulmonary disease (copd)
- emphysema
- inflammation
- skeletal muscle wasting
- smoking
- aecopd, acute exacerbations of copd
- bal, bronchoalveolar lavage
- balf, bal fluid
- copd, chronic obstructive pulmonary disease
- gm-csf, granulocyte/macrophage colony-stimulating factor
- gold, global initiative on chronic obstructive lung disease
- gpx, glutathione peroxidase
- hdac, histone deacetylation
- il, interleukin
- ltb4, leukotriene b4
- mapk, mitogen-activated protein kinase
- mcp-1, monocyte chemotactic protein-1
- mmp, matrix metalloproteinase
- ne, neutrophil elastase
- nf-κb, nuclear factor κb
- nrf2, nuclear erythroid-related factor 2
- o2•−, superoxide radical
- onoo−, peroxynitrite
- pde, phosphodiesterase
- pi3k, phosphoinositide 3-kinase
- ros, reactive oxygen species
- rv, rhinovirus
- slpi, secretory leucocyte protease inhibitor
- sod, superoxide dismutase
- tgf-β, transforming growth factor-β
- timp, tissue inhibitor of metalloproteinases
- tnf-α, tumour necrosis factor-α
- v/q, ventilation/perfusion
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Affiliation(s)
- Ross Vlahos
- *Lung Health Research Centre, Department of Pharmacology, University of Melbourne, Parkville, VIC 3010, Australia
| | - Steven Bozinovski
- *Lung Health Research Centre, Department of Pharmacology, University of Melbourne, Parkville, VIC 3010, Australia
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Kotz D, van de Kant K, Jöbsis Q, van Schayck CP. Effects of tobacco exposure on lung health and pulmonary biomarkers in young, healthy smokers aged 12–25 years: a systematic review. Expert Rev Respir Med 2014; 1:403-18. [DOI: 10.1586/17476348.1.3.403] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Daniel Kotz
- Epidemiologist, Maastricht University, Department of General Practice, School for Public Health and Primary Care (CAPHRI), PO Box 616, 6200 MD Maastricht, The Netherlands
| | - Kim van de Kant
- Health Scientist, University Hospital Maastricht, Department of Paediatrics, Maastricht, The Netherlands
| | - Quirijn Jöbsis
- Paediatric Pulmonologist, University Hospital Maastricht, Department of Paediatrics, Maastricht, The Netherlands
| | - Constant P van Schayck
- Professor of Preventive Medicine, Maastricht University, Department of General Practice, School for Public Health and Primary Care (CAPHRI), Maastricht, The Netherlands
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Abstract
Oxidative stress plays a role in a variety of diseases but it is even more pertinent in chronic obstructive pulmonary disease (COPD) given the increased oxidant burden in smokers. The increased oxidant burden results from the fact that cigarette smoke contains over 4700 different chemical compounds and more than 10(15) oxidants/free radicals per puff. Other factors, such as air pollutants, infections, and occupational dusts that may exacerbate COPD, also have the potential to produce oxidative stress. These oxidants give rise to Reactive Oxygen Species (ROS) that are generated enzymatically by inflammatory and epithelial cells within the lung as part of an inflammatory immune response towards a pathogen or irritant. Thus, while ROS are necessary for host defence against invading pathogens, increased levels of ROS have been implicated in initiating inflammatory responses in the lungs through the activation of transcriptional factors, signal transduction pathways, chromatin remodelling and gene expression of pro-inflammatory mediators. However, the normal lung has developed defences to ROS-mediated damage, which include antioxidant enzymes such as superoxide dismutase, catalase, and glutathione peroxidase. In this review we consider the therapeutic potential of the antioxidant enzyme glutathione peroxidase-1 for the treatment of cigarette smoke-induced lung inflammation and damage.
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Affiliation(s)
- Ross Vlahos
- Department of Pharmacology & TherapeuticsLung Health Research Centre, The University of Melbourne, Parkville, Australia,Correspondence to: Ross Vlahos, Department of Pharmacology & Therapeutics, Lung Health Research Centre, The University of Melbourne, Parkville VIC 3010, Australia.
| | - Steven Bozinovski
- Department of Pharmacology & TherapeuticsLung Health Research Centre, The University of Melbourne, Parkville, Australia
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Ota T, Yasuda M, Iijima R, Yui S, Fukuuchi T, Yamaoka N, Mawatari KI, Kaneko K, Nakagomi K. Development of a fluorescence analysis method for N-acetylneuraminic acid and its oxidized product ADOA. J Chromatogr B Analyt Technol Biomed Life Sci 2013; 932:152-7. [DOI: 10.1016/j.jchromb.2013.06.003] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2012] [Revised: 06/03/2013] [Accepted: 06/07/2013] [Indexed: 01/17/2023]
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Marek E, Volke J, Mückenhoff K, Platen P, Marek W. Exercise in Cold Air and Hydrogen Peroxide Release in Exhaled Breath Condensate. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2013; 756:169-77. [DOI: 10.1007/978-94-007-4549-0_22] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/13/2023]
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Abstract
Sphingolipids play key roles in cancer, yet our current understanding of sphingolipid function in lung cancer is limited to a few key players. The best characterized of these are sphingosine-1-phosphate and ceramide which are described for their opposing roles in cell fate. However, because sphingolipids as a whole are readily interconverted by a complex enzymatic machinery, no single sphingolipid appears to have exactly one role. Instead, the roles of specific sphingolipids appear to be context specific as demonstrated by findings that ceramide-1-phosphate has both proliferative and apoptotic effects depending on its concentration. Therefore, we present herein several years of research on ceramide, a sphingolipid linked to apoptotic signaling, that is emerging in cancer research for its potential roles in proliferation and cell-to-cell communication via exosomes.Ceramide is a well-studied sphingolipid in both normal and pathological conditions ranging from skin development to lung cancer. Interestingly, several groups have previously reported its increased levels in emphysema patients who are smokers, a patient subpopulation greatly susceptible to lung cancer. However, the molecular mechanisms through which cigarette smoke (CS) and ceramide accumulation lead to lung cancer, non-small cell lung cancer (NSCLC) specifically, are unknown.Interestingly, recent studies clearly establish that two signaling pathways are activated during CS exposure in the lung airway. One centers on the activation of neutral sphingomyelinase2 (nSMase2), an enzyme that hydrolyzes sphingomyelin to ceramide. The other pathway focuses on the oncogenic EGF receptor (EGFR), which becomes aberrantly activated but not degraded, leading to prolonged proliferative signaling. Recent studies show that these two signaling pathways may actually converge and integrate. Specifically, Goldkorn et al. demonstrated that during CS exposure, EGFR is favorably co-localized in ceramide-enriched regions of the plasma membrane, proposing that nSMase2/ceramide plays a role in the aberrant EGFR activation, leading to augmented tumorigenic signaling. Moreover, new findings indicate that CS exposure may induce resistance to the tyrosine kinase inhibitors (TKIs), used for treatment of NSCLC, merely through posttranslational molecular alterations. Furthermore, structural anomalies of the CS-activated EGFR appear to be supported by the excess ceramide produced by the CS-activated nSMase2 in the plasma membrane of lung epithelial cells.We present in this chapter the progression of the sphingolipid field in lung cancer using ceramide as an example. However, many crucial questions remain to be answered regarding the role of sphingolipids in lung cancer because of the glut of promising observations.
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Liu HC, Lu MC, Lin YC, Wu TC, Hsu JY, Jan MS, Chen CM. Differences in IL-8 in serum and exhaled breath condensate from patients with exacerbated COPD or asthma attacks. J Formos Med Assoc 2012; 113:908-14. [PMID: 25530067 DOI: 10.1016/j.jfma.2012.09.018] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2012] [Revised: 08/29/2012] [Accepted: 09/24/2012] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND/PURPOSE The collection of exhaled breath condensate (EBC) is a noninvasive method that can be used to monitor the inflammatory status of patients with chronic airway diseases. We aimed to study differences in cytokine expression between patients with exacerbations of chronic obstructive pulmonary disease (COPD) and patients with asthma attacks. METHODS Using a custom-made device and methods based on American Thoracic Society (ATS)/European Respiratory Society (ERS) recommendations, EBC samples were collected from nine COPD patients, 12 asthma patients and 10 healthy individuals. Cytokine concentrations in serum and EBC were measured via commercial ELISA kits. RESULTS Of four cytokines measured in EBC [interleukin-8 (IL-8), IL-17, IL-4 and tumor necrosis factor-α (TNF-α)], only IL-8 was significantly higher in COPD than in asthma patients (5.27 ± 0.18 vs. 4.36 ± 0.34 pg/mL, p = 0.001). Moreover, COPD patients had higher serum IL-8 than asthma patients (10.57 ± 0.55 vs. 5.15 ± 0.24 pg/mL, p < 0.001). No significant correlation between serum and EBC cytokine concentrations was observed in each subgroup of patients. CONCLUSION Compared with patients with asthma attacks, patients with exacerbated COPD had increased IL-8 expression in both serum and EBC. These results suggest that IL-8 may be more important in airway and systemic inflammation in COPD exacerbations than in asthma attacks.
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Affiliation(s)
- Hsu-Chung Liu
- Division of Chest Medicine, Department of Internal Medicine, Chung Shan Medical University Hospital and Cheng Ching Hospital, Taichung, Taiwan; School of Medicine, Chung Shan Medical University, Taichung, Taiwan; Department of Life Sciences, Agricultural Biotechnology Center, National Chung Hsing University, Taichung, Taiwan
| | - Min-Chi Lu
- Institute of Microbiology and Immunology, Chung Shan Medical University, Taichung, Taiwan
| | - Yi-Chun Lin
- Department of Life Sciences, Agricultural Biotechnology Center, National Chung Hsing University, Taichung, Taiwan
| | - Tzu-Chin Wu
- Division of Chest Medicine, Department of Internal Medicine, Chung Shan Medical University Hospital and Cheng Ching Hospital, Taichung, Taiwan; School of Medicine, Chung Shan Medical University, Taichung, Taiwan
| | - Jeng-Yuan Hsu
- Division of Chest Medicine, Department of Internal Medicine, Taichung Veterans General Hospital, Taichung, Taiwan; Institute of Medicine, Chung Shan Medical University, Taichung, Taiwan
| | - Ming-Shiou Jan
- Institute of Microbiology and Immunology, Chung Shan Medical University, Taichung, Taiwan.
| | - Chuan-Mu Chen
- Department of Life Sciences, Agricultural Biotechnology Center, National Chung Hsing University, Taichung, Taiwan.
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Tanni SE, Correa CR, Angeleli AY, Vale SA, Coelho LS, Godoy I. Increased production of hydrogen peroxide by peripheral blood monocytes associated with smoking exposure intensity in smokers. J Inflamm (Lond) 2012; 9:45. [PMID: 23170847 PMCID: PMC3526447 DOI: 10.1186/1476-9255-9-45] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2012] [Accepted: 11/13/2012] [Indexed: 12/02/2022] Open
Abstract
UNLABELLED BACKGROUND Smoking is known to be associated with oxidative stress; however, it has not been elucidated whether the oxidative response is influenced by the intensity of smoking exposure. OBJECTIVES Evaluate the effect of smoking exposure on the secretion of hydrogen peroxide (H2O2) by the peripheral blood monocytes of smokers. METHODS A total of 25 smokers (50.3±8.8 years, 48% male) underwent the following evaluations: spirometry, pulse oximetry, body composition and total peripheral blood count. Peripheral blood monocyte (PBM) cultures were isolated and maintained, and IL-6 and TNF-α were measured in the plasma and in the supernatants of spontaneous and stimulated cultures. H2O2 was evaluated in the supernatants of the PBM cultures, and a subset of the PBM culture supernatants was stimulated with phorbol myristate acetate (PMA). We also evaluated 38 healthy controls (49.1±8.2 years, 42% male). RESULTS The spontaneous and stimulated monocytes' secretion of H2O2 were statistically higher in the smokers than in the healthy controls (p<0.001). The H2O2 secretions were statistically significant higher after stimulation with PMA in both groups (p<0.001). In the multiple regression analysis, we identified a positive, statistically significant association between pack-years of smoking and the spontaneous secretion of H2O2 by PBM culture, adjusted for potential confounding variables. The association between PBM culture secretion of H2O2 and the production of TNF-α and IL-6 was not significant. CONCLUSION We identified a positive association between higher production of H2O2 in smokers and higher smoking exposure during life. The influence of pack-years smoking may be a key modifiable factor in oxidative stress associated to smoking.
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Affiliation(s)
- Suzana E Tanni
- Faculdade de Medicina de Botucatu, Disciplina de Pneumologia, Univ Estadual Paulista, UNESP, Botucatu, São Paulo, Brazil
- Departamento de Clínica Médica da Faculdade de Medicina de Botucatu, UNESP, Distrito de Rubião Júnior, Botucatu, SP, 18618-970, Brazil
| | - Camila R Correa
- Faculdade de Medicina de Botucatu, Univ Estadual Paulista, UNESP, Departamento de Patologia, Botucatu, São Paulo, Brazil
| | - Aparecida Y Angeleli
- Faculdade de Medicina de Botucatu, Disciplina de Pneumologia, Univ Estadual Paulista, UNESP, Botucatu, São Paulo, Brazil
| | - Simone A Vale
- Faculdade de Medicina de Botucatu, Disciplina de Pneumologia, Univ Estadual Paulista, UNESP, Botucatu, São Paulo, Brazil
| | - Liana S Coelho
- Faculdade de Medicina de Botucatu, Disciplina de Pneumologia, Univ Estadual Paulista, UNESP, Botucatu, São Paulo, Brazil
| | - Irma Godoy
- Faculdade de Medicina de Botucatu, Disciplina de Pneumologia, Univ Estadual Paulista, UNESP, Botucatu, São Paulo, Brazil
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Nagaraja C, Shashibhushan BL, Sagar, Asif M, Manjunath PH. Hydrogen peroxide in exhaled breath condensate: A clinical study. Lung India 2012; 29:123-7. [PMID: 22628925 PMCID: PMC3354484 DOI: 10.4103/0970-2113.95303] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Objectives: To study the ongoing inflammatory process of lung in healthy individuals with risk factors and comparing with that of a known diseased condition. To study the inflammatory response to treatment. Background: Morbidity and mortality of respiratory diseases are raising in trend due to increased smokers, urbanization and air pollution, the diagnosis of these conditions during early stage and management can improve patient's lifestyle and morbidity. Materials and Methods: One hundred subjects were studied from July 2010 to September 2010; the level of hydrogen peroxide concentration in exhaled breath condensate was measured using Ecocheck. Results: Of the 100 subjects studied, 23 were healthy individuals with risk factors (smoking, exposure to air pollution, and urbanization); the values of hydrogen peroxide in smokers were 200-2220 nmol/l and in non-smokers 340-760 nmol/l. In people residing in rural areas values were 20-140 nmol/l in non-smokers and 180 nmol/l in smokers. In chronic obstructive pulmonary disease cases, during acute exacerbations values were 540-3040 nmol/l and 240-480 nmol/l following treatment. In acute exacerbations of bronchial asthma, values were 400-1140 nmol/l and 100-320 nmol/l following treatment. In cases of bronchiectasis, values were 300-340 nmol/l and 200-280 nmol/l following treatment. In diagnosed pneumonia cases values were 1060-11800 nmol/l and 540-700 nmol/l following treatment. In interstitial lung diseases, values ranged from 220-720 nmol/l and 210-510 nmol/l following treatment. Conclusion: Exhaled breath condensate provides a non-invasive means of sampling the lower respiratory tract. Collection of exhaled breath condensate might be useful to detect the oxidative destruction of the lung as well as early inflammation of the airways in a healthy individual with risk factors and comparing the inflammatory response to treatment.
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Affiliation(s)
- C Nagaraja
- Department of Pulmonary Medicine, Rajiv Gandhi Institute of Chest Diseases, BMCRI, Bangalore, India
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Antczak A, Ciebiada M, Pietras T, Piotrowski WJ, Kurmanowska Z, Górski P. Exhaled eicosanoids and biomarkers of oxidative stress in exacerbation of chronic obstructive pulmonary disease. Arch Med Sci 2012; 8:277-85. [PMID: 22662001 PMCID: PMC3361040 DOI: 10.5114/aoms.2012.28555] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/21/2010] [Revised: 10/14/2010] [Accepted: 11/30/2010] [Indexed: 11/17/2022] Open
Abstract
INTRODUCTION Eicosanoids and oxidants play an important role in inflammation, but their role in chronic obstructive pulmonary disease (COPD) is uncertain. In this study we hypothesized that levels of exhaled leukotrienes, prostaglandins and biomarkers of oxidative stress are increased in infectious exacerbations of COPD and that they decrease after antibiotic therapy. MATERIAL AND METHODS Cysteinyl-leukotrienes (LTs), leukotriene B(4) (LTB(4)), prostaglandin E(4), hydrogen peroxide (H(2)O(2)) and 8-isoprostane were measured in exhaled breath condensate (EBC) in 16 COPD patients with infectious exacerbations (mean age 64 ±12 years, 13 male) on day 1, during antibiotic therapy (days 2-4), 2-4 days after therapy and at a follow-up visit when stable (21-28 days after therapy). RESULTS There was a significant fall in concentration of cys-LTs, LTB(4) and 8-isoprostane at visit 3 compared to day 1 (cys-LTs: 196.5 ±38.4 pg/ml vs. 50.1 ±8.2 pg/ml, p < 0.002; LTB(4): 153.6 ±25.5 pg/ml vs. 71.9 ±11.3 pg/ml, p < 0.05; 8-isoprostane: 121.4 ±14.6 pg/ml vs. 56.1 ±5.2 pg/ml, p < 0.03, respectively). Exhaled H(2)O(2) was higher on day 1 compared to that at visits 2 and 3 (0.74 ±0.046 µM vs. 0.52 ±0.028 µM and 0.35 ±0.029 µM, p < 0.01 and p < 0.01, respectively). Exhaled PGE(2) levels did not change during exacerbations of COPD. Exhaled eicosanoids and H(2)O(2) in EBC measured at the follow-up visit (stable COPD) were significantly higher compared to those from healthy subjects. CONCLUSIONS We conclude that eicosanoids and oxidants are increased in infectious exacerbations of COPD. They are also elevated in the airways of stable COPD patients compared to healthy subjects.
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Affiliation(s)
- Adam Antczak
- Department of Pneumology and Allergy, Medical University of Lodz, Poland
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Frazziano G, Champion HC, Pagano PJ. NADPH oxidase-derived ROS and the regulation of pulmonary vessel tone. Am J Physiol Heart Circ Physiol 2012; 302:H2166-77. [PMID: 22427511 DOI: 10.1152/ajpheart.00780.2011] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Pulmonary vessel constriction results from an imbalance between vasodilator and vasoconstrictor factors released by the endothelium including nitric oxide, endothelin, prostanoids, and reactive oxygen species (ROS). ROS, generated by a variety of enzymatic sources (such as mitochondria and NADPH oxidases, a.k.a. Nox), appear to play a pivotal role in vascular homeostasis, whereas elevated levels effect vascular disease. The pulmonary circulation is very sensitive to changes in the partial pressure of oxygen and differs from the systemic circulation in its response to this change. In fact, the pulmonary vessels contract in response to low oxygen tension, whereas systemic vessels dilate. Growing evidence suggests that ROS production and ROS-related pathways may be key factors that underlie this differential response to oxygen tension. A major emphasis of our laboratory is the role of Nox isozymes in cardiovascular disease. In this review, we will focus our attention on the role of Nox-derived ROS in the control of pulmonary vascular tone.
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Affiliation(s)
- G Frazziano
- Department of Pharmacology and Chemical Biology and Vascular Medicine Institute, University of Pittsburgh, Pennsylvania, USA
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Taito S, Sekikawa K, Domen S, Konishi K, Kimura T, Takahashi M, Inamizu T, Hamada H. Pulmonary Oxidative Stress Is Induced by Maximal Exercise in Young Cigarette Smokers. Nicotine Tob Res 2011; 14:243-7. [DOI: 10.1093/ntr/ntr237] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Comhair SAA, Gaston BM, Ricci KS, Hammel J, Dweik RA, Teague WG, Meyers D, Ampleford EJ, Bleecker ER, Busse WW, Calhoun WJ, Castro M, Chung KF, Curran-Everett D, Israel E, Jarjour WN, Moore W, Peters SP, Wenzel S, Hazen SL, Erzurum SC. Detrimental effects of environmental tobacco smoke in relation to asthma severity. PLoS One 2011; 6:e18574. [PMID: 21572527 PMCID: PMC3087715 DOI: 10.1371/journal.pone.0018574] [Citation(s) in RCA: 82] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2010] [Accepted: 03/04/2011] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND Environmental tobacco smoke (ETS) has adverse effects on the health of asthmatics, however the harmful consequences of ETS in relation to asthma severity are unknown. METHODS In a multicenter study of severe asthma, we assessed the impact of ETS exposure on morbidity, health care utilization and lung functions; and activity of systemic superoxide dismutase (SOD), a potential oxidative target of ETS that is negatively associated with asthma severity. FINDINGS From 2002-2006, 654 asthmatics (non-severe 366, severe 288) were enrolled, among whom 109 non-severe and 67 severe asthmatics were routinely exposed to ETS as ascertained by history and validated by urine cotinine levels. ETS-exposure was associated with lower quality of life scores; greater rescue inhaler use; lower lung function; greater bronchodilator responsiveness; and greater risk for emergency room visits, hospitalization and intensive care unit admission. ETS-exposure was associated with lower levels of serum SOD activity, particularly in asthmatic women of African heritage. INTERPRETATION ETS-exposure of asthmatic individuals is associated with worse lung function, higher acuity of exacerbations, more health care utilization, and greater bronchial hyperreactivity. The association of diminished systemic SOD activity to ETS exposure provides for the first time a specific oxidant mechanism by which ETS may adversely affect patients with asthma.
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Affiliation(s)
- Suzy A. A. Comhair
- Departments of Pathobiology, Cleveland Clinic, Cleveland, Ohio, United States of America
- * E-mail: (SAAC); (SCE)
| | - Benjamin M. Gaston
- Department of Pediatrics, University of Virginia, Charlottesville, Virginia, United States of America
| | - Kristin S. Ricci
- Departments of Pathobiology, Cleveland Clinic, Cleveland, Ohio, United States of America
| | - Jeffrey Hammel
- Departments of Pathobiology, Cleveland Clinic, Cleveland, Ohio, United States of America
| | - Raed A. Dweik
- Departments of Pathobiology, Cleveland Clinic, Cleveland, Ohio, United States of America
- Respiratory Institute, Cleveland Clinic, Cleveland, Ohio, United States of America
| | - W. Gerald Teague
- Department of Pediatrics, University of Virginia, Charlottesville, Virginia, United States of America
| | - Deborah Meyers
- Pulmonary, Critical Care, Allergy and Immunologic Diseases, Wake Forest University, Winston-Salem, North Carolina, United States of America
| | - Elizabeth J. Ampleford
- Pulmonary, Critical Care, Allergy and Immunologic Diseases, Wake Forest University, Winston-Salem, North Carolina, United States of America
| | - Eugene R. Bleecker
- Pulmonary, Critical Care, Allergy and Immunologic Diseases, Wake Forest University, Winston-Salem, North Carolina, United States of America
| | - William W. Busse
- Department of Internal Medicine, University of Wisconsin, Madison, Wisconsin, United State of America
| | - William J. Calhoun
- Department of Internal Medicine, University of Texas Medical Branch at Galveston, Galveston, Texas, United States of America
| | - Mario Castro
- Internal Medicine/Pulmonary and Critical Care Medicine, Washington University, St Louis, Missouri, United States of America
| | - Kian Fan Chung
- National Heart and Lung Institute, Imperial College School of Medicine, London, United Kingdom
| | - Douglas Curran-Everett
- Division of Biostatistics, National Jewish Center, Denver, Colorado, United States of America
| | - Elliot Israel
- Department of Medicine, Brigham and Women's Hospital, Boston, Massachusetts, United States of America
| | - W. Nizar Jarjour
- Department of Internal Medicine, University of Wisconsin, Madison, Wisconsin, United State of America
| | - Wendy Moore
- Pulmonary, Critical Care, Allergy and Immunologic Diseases, Wake Forest University, Winston-Salem, North Carolina, United States of America
| | - Stephen P. Peters
- Pulmonary, Critical Care, Allergy and Immunologic Diseases, Wake Forest University, Winston-Salem, North Carolina, United States of America
| | - Sally Wenzel
- Asthma Institute, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
| | - Stanley L. Hazen
- Department of Cell Biology and Center for Cardiovascular Diagnostics and Prevention, Cleveland Clinic, Cleveland, Ohio, United States of America
| | - Serpil C. Erzurum
- Departments of Pathobiology, Cleveland Clinic, Cleveland, Ohio, United States of America
- Respiratory Institute, Cleveland Clinic, Cleveland, Ohio, United States of America
- * E-mail: (SAAC); (SCE)
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Teng Y, Sun P, Zhang J, Yu R, Bai J, Yao X, Huang M, Adcock IM, Barnes PJ. Hydrogen peroxide in exhaled breath condensate in patients with asthma: a promising biomarker? Chest 2011; 140:108-116. [PMID: 21436249 DOI: 10.1378/chest.10-2816] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
BACKGROUND The measurement of hydrogen peroxide (H(2)O(2)) in exhaled breath condensate (EBC) has been proposed as a noninvasive way of monitoring airway inflammation. However, results from individual studies on EBC H(2)O(2) evaluation of asthma are conflicting. The purpose of this study was to explore whether EBC H(2)O(2) is elevated in people with asthma and whether it reflects disease severity and disease control or responds to corticosteroid treatment. METHODS Studies were identified by searching PubMed, Embase, Cochrane Database, Cumulative Index to Nursing and Allied Health Literature (CINAHL), and www.controlled-trials.com for relevant reports published before September 2010. Observational studies comparing levels of EBC H(2)O(2) between patients with asthma who were nonsmokers and healthy subjects were included. Data were independently extracted by two investigators and analyzed using Stata 10.0 software. RESULTS Eight studies (involving 728 participants) were included. EBC H(2)O(2) concentrations were significantly higher in patients with asthma who were nonsmokers compared with healthy subjects, and higher values of EBC H(2)O(2) were observed at each level of asthma, classified either by severity or control level, and the values were negatively correlated with FEV(1). In addition, EBC H(2)O(2) concentrations were lower in patients with asthma treated with corticosteroids than in patients with asthma not treated with corticosteroids. CONCLUSIONS H(2)O(2) might be a promising biomarker for guiding asthma treatment. However, further investigation is needed to establish its role.
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Affiliation(s)
- Yue Teng
- Department of Respiratory Medicine, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Peili Sun
- Department of Respiratory Medicine, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Jingying Zhang
- Department of Respiratory Medicine, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Rongbin Yu
- Department of Epidemiology and Biostatistics, School of Public Health, Nanjing Medical University, Nanjing, China
| | - Jianling Bai
- Department of Epidemiology and Biostatistics, School of Public Health, Nanjing Medical University, Nanjing, China
| | - Xin Yao
- Department of Respiratory Medicine, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China.
| | - Mao Huang
- Department of Respiratory Medicine, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Ian M Adcock
- Airway Disease Section, National Heart and Lung Institute, Imperial College, London, England
| | - Peter J Barnes
- Airway Disease Section, National Heart and Lung Institute, Imperial College, London, England
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Campos C, Guzmán R, López-Fernández E, Casado Á. Urinary biomarkers of oxidative/nitrosative stress in healthy smokers. Inhal Toxicol 2011; 23:148-56. [DOI: 10.3109/08958378.2011.554460] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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DOMEN S, TAITO S, KONISHI K, TAKAHASHI M, SEKIKAWA K, INAMIZU T, HAMADA H. Pulmonary Oxidative Stress is not Increased by Short-period High Intensity Exercise in Healthy Young Subjects. ACTA ACUST UNITED AC 2011. [DOI: 10.1589/rika.26.287] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Affiliation(s)
- Sayaka DOMEN
- Graduate School of Health Sciences, Hiroshima University
| | - Shunsuke TAITO
- Graduate School of Health Sciences, Hiroshima University
| | - Kana KONISHI
- Graduate School of Health Sciences, Hiroshima University
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Ćalušić AL, Varnai VM, Macan J. Acute effects of smoking and food consumption on breath condensate pH in healthy adults. Exp Lung Res 2010; 37:92-100. [DOI: 10.3109/01902148.2010.521616] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
| | - Veda M. Varnai
- Institute for Medical Research and Occupational Health, Zagreb, Croatia
| | - Jelena Macan
- Institute for Medical Research and Occupational Health, Zagreb, Croatia
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Lee JS, Shin JH, Lee JO, Lee KM, Kim JH, Choi BS. Levels of Exhaled Breath Condensate pH and Fractional Exhaled Nitric Oxide in Retired Coal Miners. Toxicol Res 2010; 26:329-37. [PMID: 24278541 PMCID: PMC3834506 DOI: 10.5487/tr.2010.26.4.329] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2010] [Revised: 05/24/2010] [Accepted: 06/12/2010] [Indexed: 11/20/2022] Open
Abstract
Inhaled inorganic dusts, such as coal, can cause inflammation and fibrosis in the lungs, known as pneumoconiosis. Diagnosis of pneumoconiosis depends on morphological changes by radiological findings and functional change by pulmonary function test (PFT) . Unfortunately, current diagnostic findings are limited only to lung fibrosis, which is usually irreversibly progressive. Therefore, it is important that research on potential and prospective biomarkers for pneumoconiosis should be conducted prior to initiation of irreversible radiological or functional changes in the lungs. Analytical techniques using exhaled breath condensate (EBC) or exhaled gas are non-invasive methods for detection of various respiratory diseases. The objective of this study is to investigate the relationship between inflammatory biomarkers, such as EBC pH or fractional exhaled nitric oxide (FENO) , and pneumoconiosis among 120 retired coal miners (41 controls and 79 pneumoconiosis patients) . Levels of EBC pH and FENO did not show a statistically significant difference between the pneumoconiosis patient group and pneumoconiosis patients with small opacity classified by International Labor Organization (ILO) classification. The mean concentration of FENO in the low percentage FEV1 (< 80%) was lower than that in the high percentage (80% ≤) (p = 0.023) . The mean concentration of FENO in current smokers was lower than that in non smokers (never or past smokers) (p = 0.027) . Although there was no statistical significance, the levels of FENO in smokers tended to decrease, compared with non smokers, regardless of pneumoconiosis. In conclusion, there was no significant relationship between the level of EBC pH or FENO and radiological findings or PFT. The effects between exhaled biomarkers and pneumoconiosis progression, such as decreasing PFT and exacerbation of radiological findings, should be monitored.
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Affiliation(s)
- Jong Seong Lee
- Occupational Lung Diseases Institute, COMWEL, Ansan 426-858, Korea
| | - Jae Hoon Shin
- Occupational Lung Diseases Institute, COMWEL, Ansan 426-858, Korea
| | - Joung Oh Lee
- Occupational Lung Diseases Institute, COMWEL, Ansan 426-858, Korea
| | - Kyung Myung Lee
- Occupational Lung Diseases Institute, COMWEL, Ansan 426-858, Korea
| | - Ji Hong Kim
- Ansan Workers’ Compensation Hospital, COMWEL, Ansan 426-858, Korea
| | - Byung-Soon Choi
- Occupational Lung Diseases Institute, COMWEL, Ansan 426-858, Korea
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Möller W, Heimbeck I, Weber N, Khadem Saba G, Körner B, Neiswirth M, Kohlhäufl M. Fractionated exhaled breath condensate collection shows high hydrogen peroxide release in the airways. J Aerosol Med Pulm Drug Deliv 2010; 23:129-35. [PMID: 20073556 DOI: 10.1089/jamp.2009.0764] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
BACKGROUND Exhaled breath condensate (EBC) allows noninvasive monitoring of inflammation in the lung. Activation of inflammatory cells results in an increased production of reactive oxygen species, leading to the formation of hydrogen peroxide (H(2)O(2)). In addition, cigarette smoking causes an influx of inflammatory cells, and higher levels of H(2)O(2) have been found in EBC of smokers. However, there are still unresolved issues reflected by large variations in exhaled H(2)O(2) and uncertainties about the origin of H(2)O(2) release in the lung. METHODS We collected EBC as fractionated samples from the airways and from the lung periphery in 10 nonsmokers, eight asymptomatic smokers, and in eight chronic obstructive pulmonary disease (COPD) patients, and H(2)O(2) concentration and acidity (pH) were analyzed in the airway and the alveolar fraction. RESULTS In all subjects studied, H(2)O(2) was 2.6 times higher in the airway versus the alveolar fraction. Airway H(2)O(2) was twofold higher in smokers and fivefold higher in COPD patients compared to nonsmokers. In all study groups, there was no significant difference in deaerated pH between the airway and the alveolar sample. CONCLUSIONS Exhaled H(2)O(2) is released at higher concentrations from the airways of all subjects studied, implying that the airways may be the dominant location of H(2)O(2) production. Because many lung diseases cause inflammation at different sites of the lung, fractionated sampling of EBC can reduce variability and maintain an anatomical allocation of the exhaled biomarkers.
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Affiliation(s)
- Winfried Möller
- Helmholtz Zentrum München, German Research Center for Environmental Health, Clinical Cooperation Group Inflammatory Lung Diseases, Institute for Lung Biology and Disease (iLBD), Gauting, Germany.
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Biomarkers in asthma and allergic rhinitis. Pulm Pharmacol Ther 2010; 23:468-81. [PMID: 20601050 DOI: 10.1016/j.pupt.2010.06.006] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/14/2010] [Accepted: 06/23/2010] [Indexed: 11/20/2022]
Abstract
A biological marker (biomarker) is a physical sign or laboratory measurement that can serve as an indicator of biological or pathophysiological processes or as a response to a therapeutic intervention. An applicable biomarker possesses the characteristics of clinical relevance (sensitivity and specificity for the disease) and is responsive to treatment effects, in combination with simplicity, reliability and repeatability of the sampling technique. Presently, there are several biomarkers for asthma and allergic rhinitis that can be obtained by non-invasive or semi-invasive airway sampling methods meeting at least some of these criteria. In clinical practice, such biomarkers can provide complementary information to conventional disease markers, including clinical signs, spirometry and PC(20)methacholine or histamine. Consequently, biomarkers can aid to establish the diagnosis, in staging and monitoring of the disease activity/progression or in predicting or monitoring of a treatment response. Especially in (young) children, reliable, non-invasive biomarkers would be valuable. Apart from diagnostic purposes, biomarkers can also be used as (surrogate) markers to predict a (novel) drug's efficacy in target populations. Therefore, biomarkers are increasingly applied in early drug development. When implementing biomarkers in clinical practice or trials of asthma and allergic rhinitis, it is important to consider the heterogeneous nature of the inflammatory response which should direct the selection of adequate biomarkers. Some biomarker sampling techniques await further development and/or validation, and should therefore be applied as a "back up" of established biomarkers or methods. In addition, some biomarkers or sampling techniques are less suitable for (very young) children. Hence, on a case by case basis, a decision needs to be made what biomarker is adequate for the target population or purpose pursued. Future development of more sophisticated sampling methods and quantification techniques, such as--omics and biomedical imaging, will enable detection of adequate biomarkers for both clinical and research applications.
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Goldkorn T, Filosto S. Lung injury and cancer: Mechanistic insights into ceramide and EGFR signaling under cigarette smoke. Am J Respir Cell Mol Biol 2010; 43:259-68. [PMID: 20525802 DOI: 10.1165/rcmb.2010-0220rt] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Cigarette smoke has been connected to an array of chronic lung diseases and is a major source of morbidity and mortality. Active smoking is responsible for approximately 90% of lung cancer cases. In addition, cigarette smoke is associated with other chronic pulmonary diseases such as pulmonary edema, chronic bronchitis, and pulmonary emphysema, the last two also termed chronic obstructive pulmonary disease (COPD). Lung cancer and COPD are developed very frequently in chronic cigarette smokers. It has been known for some time that lung cancer incidence increases in patients with COPD. Even the existence of some low-grade emphysema without noticeable airflow obstruction is associated with significantly elevated risk of lung cancer. These recent clinical insights demand new thinking and exploration of novel mechanistic studies to fully understand these observations. Lung injury and repair involve cell death and hyperplasia of airway epithelial cells and infiltration of inflammatory cells. All of these occur simultaneously. The mechanisms of cell death and hyperplasia in the lung constitute two sides of the coin of lung injury and repair. However, most molecular studies in airway epithelial cells center on the mechanism(s) of either cell growth and proliferation or cell death and the ceramide-generating machinery that drives aberrant induction of apoptotic cell death. Very few address both sides of the coin as an outcome of cigarette smoke exposure, which is the focus of this review.
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Rabinovich RA, Vilaró J. Structural and functional changes of peripheral muscles in chronic obstructive pulmonary disease patients. Curr Opin Pulm Med 2010; 16:123-33. [PMID: 20071991 PMCID: PMC2920417 DOI: 10.1097/mcp.0b013e328336438d] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
PURPOSE OF REVIEW The purpose of this review is to identify new advances in our understanding of skeletal muscle dysfunction in patients with chronic obstructive pulmonary disease (COPD). RECENT FINDINGS Recent studies have confirmed the relevance of muscle dysfunction as an independent prognosis factor in COPD. Animal studies have shed light on the molecular mechanisms governing skeletal muscle hypertrophy/atrophy. Recent evidence in patients with COPD highlighted the contribution of protein breakdown and mitochondrial dysfunction as pathogenic mechanisms leading to muscle dysfunction in these patients. SUMMARY COPD is a debilitating disease impacting negatively on health status and the functional capacity of patients. COPD goes beyond the lungs and incurs significant systemic effects among which muscle dysfunction/wasting is one of the most important. Muscle dysfunction is a prominent contributor to exercise limitation, healthcare utilization and an independent predictor of morbidity and mortality. Gaining more insight into the molecular mechanisms leading to muscle dysfunction/wasting is key for the development of new and tailored therapeutic strategies to tackle skeletal muscle dysfunction/wasting in COPD patients.
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Affiliation(s)
- Roberto A Rabinovich
- ELEGI Laboratory, Centre for Inflammation Research, University of Edinburgh, Edinburgh, UK.
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Marek E, Platen P, Volke J, Mückenhoff K, Marek W. Hydrogen peroxide release and acid-base status in exhaled breath condensate at rest and after maximal exercise in young, healthy subjects. Eur J Med Res 2009; 14 Suppl 4:134-9. [PMID: 20156744 PMCID: PMC3521359 DOI: 10.1186/2047-783x-14-s4-134] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
OBJECTIVE Exhaled breath condensate (EBC) contains among a large number of mediators hydrogen peroxide (H2O2) as a marker of airway inflammation and oxidative stress. Similarly EBC pH also changes in respiratory diseases. It was the aim of our investigation to prove if hydrogen peroxide release and changes in pH of EBC changes with exercise. METHODS EBC was collected from 100 litres exhaled air along with samples of arterialized blood of 16 healthy subjects (9 males, 7 females, age 23 +/- 1 years). EBC hydrogen peroxide was analyzed with EcoCheck amperometer (FILT, Berlin). The rate of H(2)O(2) release was calculated from the concentration and collection time. pH and PCO(2) in blood and in EBC were measured with the Radiometer blood gas analyzer, EBC was equilibrated with a gas mixture (5% CO(2) in O(2)). The bicarbonate concentration was calculated according to the law of mass action for CO(2) and HCO(3)(-) (pK = 6.1). RESULTS H(2)O(2) concentration in EBC was 190 +/- 109 nmol/l, and H (2)O(2) release at rest was 31.0 +/- 18.3 pmol/min. At maximal exercise, the H(2)O(2) concentration in EBC increased to 250 +/- 120 nmol/l, and H(2)O(2) release significantly increased at maximal exercise to 84.4 +/- 39.9 pmol/min (P<0.01). At rest pH of the CO(2) equilibrated EBC was at 6.08 +/- 0.23 and the [HCO(3)(-)] was 1.03 +/- 0.40 mmol/l. At maximum exercise, pH 6.18 +/- 0.17 and [HCO(3)(-)] 1.23 +/- 0.30 mmol/l remained almost unaltered. CONCLUSIONS The rate of H(2)O(2) release in EBC increased during exhausting exercise (external load: 300 Watt) by a factor of 2, whereas the pH and the bicarbonate concentration of the EBC, equilibrated with 5% CO(2) at 37 degrees C were not significantly altered. It has to be proven by further experiments whether there is a linear relationship between the rates of H(2)O(2) release in EBC in graded submaximal exercise.
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Affiliation(s)
- E Marek
- Institute of Sportmedicine and Sportnutritition, Ruhr-University Bochum, Bochum, Germany.
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Comandini A, Rogliani P, Nunziata A, Cazzola M, Curradi G, Saltini C. Biomarkers of lung damage associated with tobacco smoke in induced sputum. Respir Med 2009; 103:1592-613. [DOI: 10.1016/j.rmed.2009.06.002] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/16/2008] [Revised: 05/23/2009] [Accepted: 06/01/2009] [Indexed: 11/25/2022]
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Abstract
The human lung produces considerable amounts of H(2)O(2). In the normal uninflamed epithelium of both the airways and the alveoli, mucosal release of H(2)O(2) is readily detected both in cell cultures in vitro and in the exhaled breath of humans. The dual oxidases DUOX1 and DUOX2 are the H(2)O(2)-producing isoforms of the NADPH oxidase family found in epithelial cells. The DUOXs are prominently expressed at the apical cell pole of ciliated cells in the airways and in type II cells of the alveoli. Recent studies focused on the functional consequences of H(2)O(2) release by DUOX into the lung lining fluid. In the airways, a major function of DUOX is to support lactoperoxidase (LPO) to generate bactericidal OSCN(-), and there are indications that the DUOX/LPO defense system is critically dependent on the function of the CFTR Cl(-) channel, which provides both SCN(-) (for LPO function) and HCO(3)(-) (for pH adjustment) to the airway surface liquid. Although DUOX is also functional in the alveolar epithelium, no comparable heme peroxidase is present in the alveolus, and thus DUOX-mediated H(2)O(2) release by alveolar cells may have other functions, such as cellular signaling.
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Affiliation(s)
- Horst Fischer
- Children's Hospital Oakland Research Institute, Oakland, California 94609, USA.
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Abstract
INTRODUCTION Lung cancer is the leading cause of cancer death and oxidative stress secondary to carcinogens such as cigarette smoke has been implicated in its pathogenesis. Therefore, lung cancer patients were hypothesized to have higher levels of oxidative stress markers in their exhaled breath compared with controls. METHODS Exhaled breath condensate (EBC) was collected from newly diagnosed subjects with non-small cell lung cancer (NSCLC) and control subjects in a cross-sectional observational study. The samples were then analyzed for hydrogen peroxide (H(2)O(2)), pH, 8-isoprostane, and antioxidant capacity. RESULTS A total of 71 subjects (21 NSCLC patients, 21 nonsmokers, 13 exsmokers, and 16 smokers) were recruited. NSCLC patients had significantly higher EBC H(2)O(2) concentration (NSCLC subjects versus smokers, 10.28 microM, 95% confidence interval [CI]: 4.74-22.30 and 2.29 microM, 95% CI: 1.23-4.25, respectively, p = 0.003) and lower antioxidant capacity (NSCLC versus smokers, 0.051 mM, 95% CI: 0.042-0.063 and 0.110 mM, 95% CI: 0.059-0.206, p = 0.023; NSCLC versus all controls as a group, 0.051 mM, 95% CI: 0.042-0.063 and 0.087 mM, 95% CI: 0.067-0.112, p = 0.001). They also had significantly lower pH (5.9, 3.3-7.3) compared with exsmokers (6.7, 5.8-7, p = 0.009). CONCLUSION The significant increase of H(2)O(2) and reduction in antioxidant capacity in the EBC of lung cancer patients further support the concept of the disequilibrium between levels of oxidants and antioxidants in lung cancer, which leads to increased oxidative stress. These findings suggest oxidative stress is implicated in the development of lung cancer and may be an early marker of the disease.
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Grob NM, Aytekin M, Dweik RA. Biomarkers in exhaled breath condensate: a review of collection, processing and analysis. J Breath Res 2008; 2:037004. [PMID: 21386165 DOI: 10.1088/1752-7155/2/3/037004] [Citation(s) in RCA: 85] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Exhaled breath condensate (EBC) is a potential rich source for countless biomarkers that can provide valuable information about respiratory as well as systemic diseases. EBC has been studied in a variety of diseases including allergic rhinitis, asthma, chronic obstructive lung disease, cystic fibrosis, lung cancer, and obstructive sleep apnea syndrome. Although numerous biomarkers have been discovered and studied in EBC, the methods of collection and biomarker detection have not been fully standardized. While leaving standardization methods up to individual labs for the present time is optimal for the continued discovery of new biomarkers in EBC, this decreases the reproducibility and generalizability of the findings. In this review we will discuss specific biomarkers studied in specific diseases as well as some of the related technical issues including collection, processing and analysis.
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Affiliation(s)
- N M Grob
- Department of Pulmonary, Allergy, and Critical Care Medicine/Respiratory Institute, Cleveland Clinic, Cleveland, OH 44195, USA. Pathobiology/Lerner Research Institute, Cleveland Clinic, Cleveland, OH, USA. Case Western Reserve University, School of Medicine, Cleveland, OH, USA
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Hu Y, Zhang Z, Yang C. A sensitive chemiluminescence method for the determination of H2O2 in exhaled breath condensate. ANAL SCI 2008; 24:201-5. [PMID: 18270409 DOI: 10.2116/analsci.24.201] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
In this paper, a novel flow injection chemiluminescence (FI-CL) method is proposed for the determination of picomolar L(-1) levels of hydrogen peroxide (H(2)O(2)) in exhaled breath condensate (EBC). This method is based on the oxidation of a low concentration of luminol (10(-7) M) by H(2)O(2) at a low concentration level (< 10(-8) M) in an alkaline medium catalyzed by a complex, K(5)[Cu(HIO(6))(2)] (DPC), which is not interfered by other metal ions or horseradish peroxidase (HRP). Under the optimum conditions, H(2)O(2) was determined over the range of 1.0 x 10(-10) to 1.0 x 10(-8) mol L(-1) with a detection limit of (3sigma) of 4.1 x 10(-11) mol L(-1). The relative standard deviation (RSD) was 3.2% for 5 nmol L(-1) H(2)O(2) (n = 7). The proposed method offers the advantages of ultra-sensitivity, selectivity, simplicity and rapidity for H(2)O(2) determination. It was successfully applied to directly determine trace amounts of H(2)O(2) (nmol L(-1)) in human's EBC of both rheum and healthy volunteers. A statistically significant difference was found between patients with rheum (n = 11) and control subjects without rheum (n = 11).
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Affiliation(s)
- Yufei Hu
- Department of Chemistry, Institute of Analytical Science, Southwest University, Beibei, Chongqing, PR China
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Louhelainen N, Myllärniemi M, Rahman I, Kinnula VL. Airway biomarkers of the oxidant burden in asthma and chronic obstructive pulmonary disease: current and future perspectives. Int J Chron Obstruct Pulmon Dis 2008; 3:585-603. [PMID: 19281076 PMCID: PMC2650600 DOI: 10.2147/copd.s3671] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
The pathogenesis of asthma and chronic obstructive pulmonary disease (COPD) has been claimed to be attributable to increased systemic and local oxidative stress. Detection of the oxidant burden and evaluation of their progression and phenotypes by oxidant biomarkers have proved challenging and difficult. A large number of asthmatics are cigarette smokers and smoke itself contains oxidants complicating further the use of oxidant biomarkers. One of the most widely used oxidant markers in asthma is exhaled nitric oxide (NO), which plays an important role in the pathogenesis of asthma and disease monitoring. Another oxidant marker that has been widely investigated in COPD is 8-isoprostane, but it is probably not capable of differentiating asthma from COPD, or even sensitive in the early assessment of these diseases. None of the current biomarkers have been shown to be better than exhaled NO in asthma. There is a need to identify new biomarkers for obstructive airway diseases, especially their differential diagnosis. A comprehensive evaluation of oxidant markers and their combinations will be presented in this review. In brief, it seems that additional analyses utilizing powerful tools such as genomics, metabolomics, lipidomics, and proteomics will be required to improve the specificity and sensitivity of the next generation of biomarkers.
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Affiliation(s)
- Noora Louhelainen
- Department of Medicine, Division of Pulmonary Medicine, University of Helsinki and Helsinki University Central Hospital, Helsinki, Finland
| | - Marjukka Myllärniemi
- Department of Medicine, Division of Pulmonary Medicine, University of Helsinki and Helsinki University Central Hospital, Helsinki, Finland
| | - Irfan Rahman
- Department of Environmental Medicine and the Lung Biology and Disease Program, University of Rochester Medical Center, Rochester, New York, USA
| | - Vuokko L Kinnula
- Department of Medicine, Division of Pulmonary Medicine, University of Helsinki and Helsinki University Central Hospital, Helsinki, Finland
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Nemoto T, Kawakami S, Yamashita F, Hashida M. Efficient protection by cationized catalase against H2O2 injury in primary cultured alveolar epithelial cells. J Control Release 2007; 121:74-80. [PMID: 17610981 DOI: 10.1016/j.jconrel.2007.05.020] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2006] [Revised: 05/11/2007] [Accepted: 05/17/2007] [Indexed: 01/23/2023]
Abstract
Increasing evidence suggests that hydrogen peroxide plays an important role in alveolar epithelial injury produced during many inflammatory lung diseases. In this study, the successful prevention of hydrogen peroxide (H(2)O(2))-induced injury in primary cultured rabbit alveolar epithelial cells by cationized catalase is described. Cationized catalase was synthesized by direct chemical modification to enhance its association with alveolar epithelial cells. Cationized catalase exhibited a 22.3-fold higher cellular association at 2 h than native catalase, and incubation of cationized catalase with the cells produced a 2.19-fold intracellular catalase activity, which suggested that cationized catalase distributed both to the cell membrane and into the cell interior. Cationized catalase markedly suppressed H(2)O(2)-induced cell injury. In addition, electron spin resonance spectrometry analysis revealed that cationized catalase effectively eliminated H(2)O(2) produced in the medium by glucose plus glucose oxidase. On the other hand, polyethylene glycol-modified catalase (PEG-catalase) did not have any protective effect against H(2)O(2)-induced cell injury although PEG-catalase exhibited a 2.49-fold higher cellular association at 2 h than native catalase. These results suggest that cationization of catalase is a promising strategy for the treatment of many of inflammatory lung diseases.
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Affiliation(s)
- Takayuki Nemoto
- Department of Drug Delivery Research, Graduate School of Pharmaceutical Sciences, Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan
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