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Song W, Yue Y, Zhang Q, Wang X. Copper homeostasis dysregulation in respiratory diseases: a review of current knowledge. Front Physiol 2024; 15:1243629. [PMID: 38883186 PMCID: PMC11176810 DOI: 10.3389/fphys.2024.1243629] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Accepted: 01/22/2024] [Indexed: 06/18/2024] Open
Abstract
Cu is an essential micronutrient for various physiological processes in almost all human cell types. Given the critical role of Cu in a wide range of cellular processes, the local concentrations of Cu and the cellular distribution of Cu transporter proteins in the lung are essential for maintaining a steady-state internal environment. Dysfunctional Cu metabolism or regulatory pathways can lead to an imbalance in Cu homeostasis in the lungs, affecting both acute and chronic pathological processes. Recent studies have identified a new form of Cu-dependent cell death called cuproptosis, which has generated renewed interest in the role of Cu homeostasis in diseases. Cuproptosis differs from other known cell death pathways. This occurs through the direct binding of Cu ions to lipoylated components of the tricarboxylic acid cycle during mitochondrial respiration, leading to the aggregation of lipoylated proteins and the subsequent downregulation of Fe-S cluster proteins, which causes toxic stress to the proteins and ultimately leads to cell death. Here, we discuss the impact of dysregulated Cu homeostasis on the pathogenesis of various respiratory diseases, including asthma, chronic obstructive pulmonary disease, idiopathic interstitial fibrosis, and lung cancer. We also discuss the therapeutic potential of targeting Cu. This study highlights the intricate interplay between copper, cellular processes, and respiratory health. Copper, while essential, must be carefully regulated to maintain the delicate balance between necessity and toxicity in living organisms. This review highlights the need to further investigate the precise mechanisms of copper interactions with infections and immune inflammation in the context of respiratory diseases and explore the potential of therapeutic strategies for copper, cuproptosis, and other related effects.
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Affiliation(s)
- Wei Song
- Department of Pulmonary and Critical Care Medicine, Shengjing Hospital of China Medical University, Shenyang, China
| | - Yuanyi Yue
- Department of Gastroenterology, Shengjing Hospital of China Medical University, Shenyang, China
| | - Qiang Zhang
- Department of Pulmonary and Critical Care Medicine, Shengjing Hospital of China Medical University, Shenyang, China
| | - Xueqing Wang
- Department of Gastroenterology, Shengjing Hospital of China Medical University, Shenyang, China
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Oit-Wiscombe I, Soomets U, Altraja A. Antioxidant Glutathione Analogues UPF1 and UPF17 Modulate the Expression of Enzymes Involved in the Pathophysiology of Chronic Obstructive Pulmonary Disease. Curr Issues Mol Biol 2024; 46:2343-2354. [PMID: 38534765 DOI: 10.3390/cimb46030149] [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: 02/22/2024] [Revised: 03/05/2024] [Accepted: 03/07/2024] [Indexed: 03/28/2024] Open
Abstract
Increased oxidative stress (OS) and systemic inflammation are key players in the pathophysiology of chronic obstructive pulmonary disease (COPD). We aimed to clarify the effects of synthetic glutathione (GSH) analogue peptides UPF1 and UPF17 on the mRNA levels of enzymes involved in systemic inflammation and GSH metabolism in peripheral blood mononuclear cells (PBMCs) from patients with acute exacerbation of COPD (AE-COPD) and stable COPD along with non-obstructive smokers and non-smokers. UPF1 and UPF17 increased the expression of enzymes involved in the formation of the antioxidant capacity: superoxide dismutase 1 (SOD1) and the catalytic subunit of glutamyl-cysteine ligase (GCLC) in patients with AE-COPD and stable COPD, but also in non-obstructive smokers and non-smokers. Similarly, both UPF1 and UPF17 increased the expression of inflammatory enzymes poly(ADP-ribose) polymerase-1 (PARP-1), dipeptidyl peptidase 4 (DPP4), and cyclooxygenase-2 (COX-2). Both UPF analogues acted in a gender-dependent manner by increasing the expression of certain anti-inflammatory (histone deacetylase 2 (HDAC2)) and GSH metabolism pathway (SOD1 and GSH reductase (GSR))-related enzymes in females and decreasing them in males. UPF1 and UPF17 are able to increase the expression of the enzymes involved in GSH metabolism and could serve as a lead for designing potential COPD therapies against excessive OS.
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Affiliation(s)
- Ingrid Oit-Wiscombe
- Department of Pulmonology, University of Tartu, 50406 Tartu, Estonia
- Institute of Biomedicine and Translational Medicine, University of Tartu, 50411 Tartu, Estonia
- Centre of Excellence for Genomics and Translational Medicine, University of Tartu, 50411 Tartu, Estonia
| | - Ursel Soomets
- Institute of Biomedicine and Translational Medicine, University of Tartu, 50411 Tartu, Estonia
- Centre of Excellence for Genomics and Translational Medicine, University of Tartu, 50411 Tartu, Estonia
| | - Alan Altraja
- Department of Pulmonology, University of Tartu, 50406 Tartu, Estonia
- Lung Clinic, Tartu University Hospital, 50411 Tartu, Estonia
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Ding C, Wang R, Gong X, Yuan Y. Stroke risk of COPD patients and death risk of COPD patients following a stroke: A systematic review and meta-analysis. Medicine (Baltimore) 2023; 102:e35502. [PMID: 38013361 PMCID: PMC10681394 DOI: 10.1097/md.0000000000035502] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Accepted: 09/14/2023] [Indexed: 11/29/2023] Open
Abstract
OBJECTIVE Chronic obstructive pulmonary disease (COPD) is closely related to the development and progression of cardiovascular disease. The purpose of this study is to clarify the answers to the following questions through systematic evaluation: the risk of stroke in COPD patients; the risk of stroke in acute exacerbations of COPD (AECOPD) patients; and the risk of death after stroke in COPD patients. METHODS Two reviewers independently searched EMbase, PubMed, and the Cochrane Library for relevant literature from the date of creation to February 17, 2023, for studies relating COPD to stroke patients. Of the 8039 publications retrieved, we identified 27 articles that met our selection criteria. Fixed-effects or random-effects models were used to calculate ORs and 95% confidence intervals for the combined risk. RESULTS combining studies on stroke risk in COPD patients by random-effects model suggested that COPD was an independent risk factor for stroke-associated pneumonia (OR 1.40, 95% CI: 1.24-1.59, I2 = 98.4%, P = .000), with significant heterogeneity in the results, and subgroup analysis did not find a source of heterogeneity. In the combined 7 AECOPD studies, a significantly higher risk of stroke was found (OR 1.53, 95% CI: 1.44-1.63, I2 = 49.2%, P = .066). In the combined 6 short- term prognostic studies, the relationship between COPD and risk of death was not highly significant (OR 1.12, 95% CI: 1.08-1.16, I2 = 37.4%, P = .131). In 10 long-term observational prognosis studies, COPD was suggested to be associated with death after stroke by combining data using a random-effects model (OR 1.20, 95% CI: 1.13-1.27, I2 = 56.8%, P = .014), and there was moderate heterogeneity in the combination, with subgroup analysis showing that stroke type may be a source of heterogeneity and the risk of death from ischemic stroke: OR 1.23, 95% CI: 1.17-1.29, I2 = 45.0%, P = .191 and the risk of death from both types of stroke: OR 1.12, 95% CI: 1.07-1.18, I2 =18.9%, P = .291. CONCLUSION COPD is an independent risk factor for stroke. The risk of stroke is significantly increased, especially during AECOPD. In addition, the association between COPD and short-term death in stroke patients is insignificant, while it is more associated with fatal events in the long-term prognosis.
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Affiliation(s)
- Chaowei Ding
- Department of Respiratory and Critical Care Medicine, Xiamen Humanity Hospital Fujian Medical University, Xiamen, China
- Department of Respiratory and Critical Care Medicine, The Second Hospital of Hebei Medical University, Shijiazhuang, China
| | - Runlu Wang
- Department of Respiratory and Critical Care Medicine, The Second Hospital of Hebei Medical University, Shijiazhuang, China
| | - Xiaowei Gong
- Department of Respiratory and Critical Care Medicine, The Second Hospital of Hebei Medical University, Shijiazhuang, China
| | - Yadong Yuan
- Department of Respiratory and Critical Care Medicine, The Second Hospital of Hebei Medical University, Shijiazhuang, China
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Pincemail J, Tchana-Sato V, Courtois A, Musumeci L, Cheramy-Bien JP, Munten J, Labropoulos N, Defraigne JO, Sakalihasan N. Alteration of Blood Oxidative Stress Status in Patients with Thoracic Aortic Dissection: A Pilot Study. Antioxidants (Basel) 2023; 12:antiox12051106. [PMID: 37237972 DOI: 10.3390/antiox12051106] [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: 02/28/2023] [Revised: 04/21/2023] [Accepted: 05/12/2023] [Indexed: 05/28/2023] Open
Abstract
BACKGROUND Thoracic aortic dissection (TAD) is a life-threatening condition which usually occurs on an aneurysmal aortic wall. Although increasing data have shown that inflammation and oxidative stress play an important role in the patho-physiology of dissection, systemic oxidative stress status (OSS) has not been clearly determined in patients suffering from TAD. METHODS A cohort of 115 patients presenting type A or B TAD were admitted to our center from 2013 to 2017. Out of this cohort, 46 patients were included in a study on dissected aorta (LIege study on DIssected Aorta: LIDIA). In 18 out of the 46 patients, systemic OSS parameters were evaluated after TAD diagnosis by determination of eight different antioxidants, four trace elements, two markers of oxidative lipid damage and two inflammatory markers. RESULTS The 18 TAD patients included 10 men and 8 women (median age: 62 years; interquartile range: 55-68) diagnosed with type A (N = 8) or B (N = 10) TAD. Low plasma levels of vitamin C, β-carotene, γ-tocopherol, thiol proteins, paraoxonase and selenium were observed in these 18 patients. By contrast, the concentration of copper and total hydroperoxides, copper/zinc ratio, as well as inflammatory markers, were higher than the reference intervals. No difference was observed in oxidative stress biomarker concentrations between type A and B TAD patients. CONCLUSIONS This pilot study, limited to 18 TAD patients, revealed a heightened systemic OSS, determined at 15.5 days (median) after the initial diagnosis, in those TAD patients without complications (malperfusion syndrome and aneurysm formation). Larger studies on biological fluids are needed to better characterize the oxidative stress and interpret its consequence in TAD disease.
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Affiliation(s)
- Joël Pincemail
- Department of Cardiovascular Surgery, CHU Liege, 4000 Liège, Belgium
- Department of Medical Chemistry, CHU Liege, 4000 Liège, Belgium
| | | | | | - Lucia Musumeci
- Department of Cardiovascular Surgery, CHU Liege, 4000 Liège, Belgium
| | | | - Jacobine Munten
- Department of Cardiovascular Surgery, CHU Liege, 4000 Liège, Belgium
| | - Nicos Labropoulos
- Department of Surgery, Stony Brook University Hospital, Stony Brook, NY 11794-8191, USA
| | | | - Natzi Sakalihasan
- Department of Cardiovascular Surgery, CHU Liege, 4000 Liège, Belgium
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Catteau M, Passerieux E, Blervaque L, Gouzi F, Ayoub B, Hayot M, Pomiès P. Response to Electrostimulation Is Impaired in Muscle Cells from Patients with Chronic Obstructive Pulmonary Disease. Cells 2021; 10:3002. [PMID: 34831227 PMCID: PMC8616440 DOI: 10.3390/cells10113002] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2021] [Revised: 10/27/2021] [Accepted: 10/31/2021] [Indexed: 11/16/2022] Open
Abstract
Among the comorbidities associated with chronic obstructive pulmonary disease (COPD), skeletal muscle weakness and atrophy are known to affect patient survival rate. In addition to muscle deconditioning, various systemic and intrinsic factors have been implicated in COPD muscle dysfunction but an impaired COPD muscle adaptation to contraction has never been extensively studied. We submitted cultured myotubes from nine healthy subjects and nine patients with COPD to an endurance-type protocol of electrical pulse stimulation (EPS). EPS induced a decrease in the diameter, covered surface and expression of MHC1 in COPD myotubes. Although the expression of protein degradation markers was not affected, expression of the protein synthesis marker mTOR was not induced in COPD compared to healthy myotubes after EPS. The expression of the differentiation markers p16INK4a and p21 was impaired, while expression of Myf5 and MyoD tended to be affected in COPD muscle cells in response to EPS. The expression of mitochondrial biogenesis markers PGC1α and MFN2 was affected and expression of TFAM and COX1 tended to be reduced in COPD compared to healthy myotubes upon EPS. Lipid peroxidation was increased and the expression of the antioxidant enzymes SOD2 and GPx4 was affected in COPD compared to healthy myotubes in response to EPS. Thus, we provide evidence of an impaired response of COPD muscle cells to contraction, which might be involved in the muscle weakness observed in patients with COPD.
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Affiliation(s)
- Matthias Catteau
- PhyMedExp, University of Montpellier—INSERM—CNRS, 34295 Montpellier, France; (M.C.); (E.P.); (L.B.)
| | - Emilie Passerieux
- PhyMedExp, University of Montpellier—INSERM—CNRS, 34295 Montpellier, France; (M.C.); (E.P.); (L.B.)
| | - Léo Blervaque
- PhyMedExp, University of Montpellier—INSERM—CNRS, 34295 Montpellier, France; (M.C.); (E.P.); (L.B.)
| | - Farés Gouzi
- PhyMedExp, University of Montpellier—INSERM—CNRS—CHRU Montpellier, 34295 Montpellier, France; (F.G.); (B.A.); (M.H.)
| | - Bronia Ayoub
- PhyMedExp, University of Montpellier—INSERM—CNRS—CHRU Montpellier, 34295 Montpellier, France; (F.G.); (B.A.); (M.H.)
| | - Maurice Hayot
- PhyMedExp, University of Montpellier—INSERM—CNRS—CHRU Montpellier, 34295 Montpellier, France; (F.G.); (B.A.); (M.H.)
| | - Pascal Pomiès
- PhyMedExp, University of Montpellier—INSERM—CNRS, 34295 Montpellier, France; (M.C.); (E.P.); (L.B.)
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Taniguchi A, Tsuge M, Miyahara N, Tsukahara H. Reactive Oxygen Species and Antioxidative Defense in Chronic Obstructive Pulmonary Disease. Antioxidants (Basel) 2021; 10:antiox10101537. [PMID: 34679673 PMCID: PMC8533053 DOI: 10.3390/antiox10101537] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2021] [Revised: 09/23/2021] [Accepted: 09/24/2021] [Indexed: 02/06/2023] Open
Abstract
The respiratory system is continuously exposed to endogenous and exogenous oxidants. Chronic obstructive pulmonary disease (COPD) is characterized by chronic inflammation of the airways, leading to the destruction of lung parenchyma (emphysema) and declining pulmonary function. It is increasingly obvious that reactive oxygen species (ROS) and reactive nitrogen species (RNS) contribute to the progression and amplification of the inflammatory responses related to this disease. First, we described the association between cigarette smoking, the most representative exogenous oxidant, and COPD and then presented the multiple pathophysiological aspects of ROS and antioxidative defense systems in the development and progression of COPD. Second, the relationship between nitric oxide system (endothelial) dysfunction and oxidative stress has been discussed. Third, we have provided data on the use of these biomarkers in the pathogenetic mechanisms involved in COPD and its progression and presented an overview of oxidative stress biomarkers having clinical applications in respiratory medicine, including those in exhaled breath, as per recent observations. Finally, we explained the findings of recent clinical and experimental studies evaluating the efficacy of antioxidative interventions for COPD. Future breakthroughs in antioxidative therapy may provide a promising therapeutic strategy for the prevention and treatment of COPD.
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Affiliation(s)
- Akihiko Taniguchi
- Department of Hematology, Oncology, Allergy and Respiratory Medicine, Okayama University Academic Field of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama 700-8558, Japan;
| | - Mitsuru Tsuge
- Department of Pediatrics, Okayama University Academic Field of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama 700-8558, Japan;
| | - Nobuaki Miyahara
- Department of Medical Technology, Okayama University Academic Field of Health Sciences, Okayama 700-8558, Japan;
| | - Hirokazu Tsukahara
- Department of Pediatrics, Okayama University Academic Field of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama 700-8558, Japan;
- Correspondence:
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Meys R, Stoffels AAF, de Brandt J, van Hees HWH, Franssen FME, Sillen MJH, Wouters EFM, Burtin C, Klijn P, Bij de Vaate E, van den Borst B, Otker JM, Donkers J, Schleich FN, Hayot M, Pomiès P, Everaert I, Derave W, Spruit MA. Beta-alanine supplementation in patients with COPD receiving non-linear periodised exercise training or neuromuscular electrical stimulation: protocol of two randomised, double-blind, placebo-controlled trials. BMJ Open 2020; 10:e038836. [PMID: 32928863 PMCID: PMC7488791 DOI: 10.1136/bmjopen-2020-038836] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
INTRODUCTION Exercise intolerance is common in patients with chronic obstructive pulmonary disease (COPD) and, although multifactorial, it is largely caused by lower-limb muscle dysfunction. Research has shown that patients with severe to very severe COPD have significantly lower levels of muscle carnosine, which acts as a pH buffer and antioxidant. Beta-alanine (BA) supplementation has been shown to consistently elevate muscle carnosine in a variety of populations and may therefore improve exercise tolerance and lower-limb muscle function. The primary objective of the current studies is to assess the beneficial effects of BA supplementation in enhancing exercise tolerance on top of two types of exercise training (non-linear periodised exercise (NLPE) training or neuromuscular electrical stimulation (NMES)) in patients with COPD. METHODS AND ANALYSIS Two randomised, double-blind, placebo-controlled trials have been designed. Patients will routinely receive either NLPE (BASE-TRAIN trial) or NMES (BASE-ELECTRIC trial) as part of standard exercise-based care during their 8-to-10 week pulmonary rehabilitation (PR) programme. A total of 222 patients with COPD (2×77 = 154 patients in the BASE-TRAIN trial and 2×34 = 68 patients in the BASE-ELECTRIC trial) will be recruited from two specialised PR centres in The Netherlands. For study purposes, patients will receive 3.2 g of oral BA supplementation or placebo per day. Exercise tolerance is the primary outcome, which will be assessed using the endurance shuttle walk test (BASE-TRAIN) or the constant work rate cycle test (BASE-ELECTRIC). Furthermore, quadriceps muscle strength and endurance, cognitive function, carnosine levels (in muscle), BA levels (in blood and muscle), markers of oxidative stress and inflammation (in blood, muscles and lungs), physical activity and quality of life will be measured. ETHICS AND DISSEMINATION Both trials were approved by CMO Regio Arnhem-Nijmegen, The Netherlands (NL70781.091.19. and NL68757.091.19). TRIAL REGISTRATION NUMBER NTR8427 (BASE-TRAIN) and NTR8419 (BASE-ELECTRIC).
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Affiliation(s)
- Roy Meys
- Department of Research and Development, CIRO, Horn, The Netherlands
- NUTRIM School of Nutrition and Translational Research in Metabolism, Maastricht, The Netherlands
- Department of Respiratory Medicine, Maastricht University Medical Centre (MUMC+), Maastricht, The Netherlands
| | - Anouk A F Stoffels
- Department of Research and Development, CIRO, Horn, The Netherlands
- NUTRIM School of Nutrition and Translational Research in Metabolism, Maastricht, The Netherlands
- Department of Respiratory Medicine, Maastricht University Medical Centre (MUMC+), Maastricht, The Netherlands
- Department of Pulmonary Diseases, Radboud UMC Dekkerswald, Nijmegen, The Netherlands
| | - Jana de Brandt
- Reval Rehabilitation Research, Biomedical Research Institute, Faculty of Rehabilitation Sciences, Hasselt University, DIepenbeek, Belgium
| | | | - Frits M E Franssen
- Department of Research and Development, CIRO, Horn, The Netherlands
- NUTRIM School of Nutrition and Translational Research in Metabolism, Maastricht, The Netherlands
- Department of Respiratory Medicine, Maastricht University Medical Centre (MUMC+), Maastricht, The Netherlands
| | | | - Emiel F M Wouters
- Department of Research and Development, CIRO, Horn, The Netherlands
- NUTRIM School of Nutrition and Translational Research in Metabolism, Maastricht, The Netherlands
- Department of Respiratory Medicine, Maastricht University Medical Centre (MUMC+), Maastricht, The Netherlands
| | - Chris Burtin
- Reval Rehabilitation Research, Biomedical Research Institute, Faculty of Rehabilitation Sciences, Hasselt University, DIepenbeek, Belgium
| | - Peter Klijn
- Department of Pulmonology, Merem Pulmonary Rehabilitation Centre, Hilversum, The Netherlands
- Department of Pulmonary Medicine, Amsterdam UMC, Amsterdam, The Netherlands
| | - Eline Bij de Vaate
- Department of Pulmonology, Merem Pulmonary Rehabilitation Centre, Hilversum, The Netherlands
| | - Bram van den Borst
- Department of Pulmonary Diseases, Radboud UMC Dekkerswald, Nijmegen, The Netherlands
| | - Jacqueline M Otker
- Patient Advisory Council, Lung Foundation Netherlands, Amersfoort, The Netherlands
- Client Council, CIRO, Horn, The Netherlands
| | | | - Florence N Schleich
- Department of Respiratory Medicine, CHU Sart-Tilman Liege, GIGA I3, Liege, Belgium
| | - Maurice Hayot
- PhyMedExp, INSERM - CNRS, University of Montpellier - Montpellier CHU, Montpellier, France
| | - Pascal Pomiès
- PhyMedExp, INSERM - CNRS, University of Montpellier - Montpellier CHU, Montpellier, France
| | - Inge Everaert
- Department of Movement and Sport Sciences, University Ghent, Ghent, Belgium
| | - Wim Derave
- Department of Movement and Sport Sciences, University Ghent, Ghent, Belgium
| | - Martijn A Spruit
- Department of Research and Development, CIRO, Horn, The Netherlands
- NUTRIM School of Nutrition and Translational Research in Metabolism, Maastricht, The Netherlands
- Department of Respiratory Medicine, Maastricht University Medical Centre (MUMC+), Maastricht, The Netherlands
- Reval Rehabilitation Research, Biomedical Research Institute, Faculty of Rehabilitation Sciences, Hasselt University, DIepenbeek, Belgium
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Reliability and Usefulness of Different Biomarkers of Oxidative Stress in Chronic Obstructive Pulmonary Disease. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2020; 2020:4982324. [PMID: 32509143 PMCID: PMC7244946 DOI: 10.1155/2020/4982324] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Revised: 04/18/2020] [Accepted: 04/27/2020] [Indexed: 12/11/2022]
Abstract
Introduction Chronic obstructive pulmonary disease (COPD) is a progressive disease characterized by airflow limitation that is not fully reversible after inhaled bronchodilator use associated with an abnormal inflammatory condition. The biggest risk factor for COPD is cigarette smoking. The exposure to noxious chemicals contained within tobacco smoke is known to cause airway epithelial injury through oxidative stress, which in turn has the ability to elicit an inflammatory response. In fact, the disruption of the delicate balance between oxidant and antioxidant defenses leads to an oxidative burden that has long been held responsible to play a pivotal role in the pathogenesis of COPD. There are currently several biomarkers of oxidative stress in COPD that have been evaluated in a variety of biological samples. The aim of this review is to identify the best studied molecules by summarizing the key literature findings, thus shedding some light on the subject. Methods We searched for relevant case-control studies examining oxidative stress biomarkers in stable COPD, taking into account the analytical method of detection as an influence factor. Results Many oxidative stress biomarkers have been evaluated in several biological matrices, mostly in the blood. Some of them consistently differ between the cases and controls even when allowing different analytical methods of detection. Conclusions The present review provides an overview of the oxidative stress biomarkers that have been evaluated in patients with COPD, bringing focus on those molecules whose reliability has been confirmed by the use of different analytical methods.
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Han MK. Chronic Obstructive Pulmonary Disease in Women: A Biologically Focused Review with a Systematic Search Strategy. Int J Chron Obstruct Pulmon Dis 2020; 15:711-721. [PMID: 32280209 PMCID: PMC7132005 DOI: 10.2147/copd.s237228] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2019] [Accepted: 03/10/2020] [Indexed: 01/06/2023] Open
Abstract
Purpose Evidence suggests that chronic obstructive pulmonary disease (COPD) symptoms and progression may differ between men and women. However, limited information is currently available on the pathophysiological and biological factors that may underlie these sex-related differences. The objective of this review is to systematically evaluate reports of potential sex-related differences, including genetic, pathophysiological, structural, and other biological factors, that may influence COPD development, manifestation, and progression in women. Patients and Methods A PubMed literature search was conducted from inception until January 2020. Original reports of genetic, hormonal, and physiological differences, and biological influences that could contribute to COPD development, manifestation, and progression in women were included. Results Overall, 491 articles were screened; 29 articles met the inclusion criteria. Results from this analysis demonstrated between-sex differences in inflammatory, immune, genetic, structural, and physiological factors in patients with COPD. Conclusion Various biological differences are observed between men and women with COPD including differences in inflammatory and metabolic pathways related to obesity and fat distribution, immune cell function and autophagy, extent and distribution of emphysema and airway wall remodeling. An enhanced understanding of these differences has the potential to broaden our understanding of how COPD develops and progresses, thereby providing an opportunity to ultimately improve diagnosis, treatment, and monitoring of COPD in both men and women.
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Affiliation(s)
- MeiLan K Han
- Division of Pulmonary and Critical Care Medicine, University of Michigan, Ann Arbor, MI, USA
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10
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Joël P, Mouna-Messaouda K, Jean-Paul CB, Jean-Olivier D, Smail M. Electrochemical Methodology for Evaluating Skin Oxidative Stress Status (SOSS). Diseases 2019; 7:diseases7020040. [PMID: 31137870 PMCID: PMC6631060 DOI: 10.3390/diseases7020040] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2019] [Revised: 05/10/2019] [Accepted: 05/22/2019] [Indexed: 12/28/2022] Open
Abstract
For the purpose of human disease prevention, several methods have been developed, and are still developing, to assess the oxidative stress status (OSS) of individuals. In the present paper, we describe an approach based on electrochemical detection able to evaluate skin oxidative stress status (SOSS) as a PAOT (Pouvoir AntiOxydant Total)-Skin Score®. Normal reference values for the PAOT-Skin Score® were: 0-62.94 (n = 263). Intra- and inter-assay coefficients of variation were, respectively, 12.47 ± 4.29% and 7.0 ± 2.5%. Our technology showed increased skin antioxidant activity following topical application of reduced coeznyme Q10 cream or vitamin C intake as orange juice or supplements. Moreover, we found significant correlations between some blood oxidative stress biomarkers and the PAOT-Skin Score ® (-tocopherol/α-tocopherol ratio (r = 0.43, p = 0.020); copper (r = -0.42, p = 0.022); copper/zinc ratio (r = -0.49, p = 0.006), and lipid peroxides (r = -0.43, p = 0.002)). In addition to being non-invasive, the present electrochemical methodology is also not expensive, fast, and easy to use.
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Affiliation(s)
- Pincemail Joël
- University of Liège and CHU, Department of Cardiovascular Surgery/CREDEC, Antioxidant Nutrition and Health Platform, Sart Tilman, 4000 Liège, Belgium.
| | - Kaci Mouna-Messaouda
- Institut Européen des Antioxydants, Oxystress Technologies, 1 rue Victor de Lespinats, 54230 Neuves-Maisons, France.
| | - Cheramy-Bien Jean-Paul
- Institut Européen des Antioxydants, Oxystress Technologies, 1 rue Victor de Lespinats, 54230 Neuves-Maisons, France.
| | - Defraigne Jean-Olivier
- University of Liège and CHU, Department of Cardiovascular Surgery/CREDEC, Antioxidant Nutrition and Health Platform, Sart Tilman, 4000 Liège, Belgium.
| | - Meziane Smail
- Institut Européen des Antioxydants, Oxystress Technologies, 1 rue Victor de Lespinats, 54230 Neuves-Maisons, France.
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Additional Effects of Nutritional Antioxidant Supplementation on Peripheral Muscle during Pulmonary Rehabilitation in COPD Patients: A Randomized Controlled Trial. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2019; 2019:5496346. [PMID: 31178967 PMCID: PMC6501222 DOI: 10.1155/2019/5496346] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/02/2018] [Accepted: 02/24/2019] [Indexed: 11/30/2022]
Abstract
Background Skeletal muscle dysfunction in patients with chronic obstructive pulmonary disease (COPD) is not fully reversed by exercise training. Antioxidants are critical for muscle homeostasis and adaptation to training. However, COPD patients experience antioxidant deficits that worsen after training and might impact their muscle response to training. Nutritional antioxidant supplementation in combination with pulmonary rehabilitation (PR) would further improve muscle function, oxidative stress, and PR outcomes in COPD patients. Methods Sixty-four COPD patients admitted to inpatient PR were randomized to receive 28 days of oral antioxidant supplementation targeting the previously observed deficits (PR antioxidant group; α-tocopherol: 30 mg/day, ascorbate: 180 mg/day, zinc gluconate: 15 mg/day, selenomethionine: 50 μg/day) or placebo (PR placebo group). PR consisted of 24 sessions of moderate-intensity exercise training. Changes in muscle endurance (primary outcome), oxidative stress, and PR outcomes were assessed. Results Eighty-one percent of the patients (FEV1 = 58.9 ± 20.0%pred) showed at least one nutritional antioxidant deficit. Training improved muscle endurance in the PR placebo group (+37.4 ± 45.1%, p < 0.001), without additional increase in the PR antioxidant group (-6.6 ± 11.3%; p = 0.56). Nevertheless, supplementation increased the α-tocopherol/γ-tocopherol ratio and selenium (+58 ± 20%, p < 0.001, and +16 ± 5%, p < 0.01, respectively), muscle strength (+11 ± 3%, p < 0.001), and serum total proteins (+7 ± 2%, p < 0.001), and it tended to increase the type I fiber proportion (+32 ± 17%, p = 0.07). The prevalence of muscle weakness decreased in the PR antioxidant group only, from 30.0 to 10.7% (p < 0.05). Conclusions While the primary outcome was not significantly improved, COPD patients demonstrate significant improvements of secondary outcomes (muscle strength and other training-refractory outcomes), suggesting a potential “add-on” effect of the nutritional antioxidant supplementation (vitamins C and E, zinc, and selenium) during PR. This trial is registered with NCT01942889.
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12
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Avci E, Avci GA. Important Biomarkers that Play a Role in the Chronic Obstructive Pulmonary Disease Process. J Med Biochem 2018; 37:46-53. [PMID: 30581341 PMCID: PMC6294106 DOI: 10.1515/jomb-2017-0035] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2017] [Accepted: 05/31/2017] [Indexed: 12/28/2022] Open
Abstract
BACKGROUND Chronic obstructive pulmonary disease (COPD) that includes multiple mechanisms such as inflammation, infection, smoking, hypoxia, and lack of antioxidant response can cause oxidative stress. In our study, we aimed to determine the changes in some oxidative stress [malondialdehyde and glutathione] and some cellular immunity markers (neopterin and TGF-b) in patients diagnosed with COPD and determine the damage to the organism. METHODS While the high-performance liquid chromatography (HPLC) method (Immuchrom kit, Germany) was utilized to determine MDA, GSH and NP levels, the ELISA method was used for TGF-b levels. RESULTS All obtained data regarding each parameter were compared with both COPD and healthy individuals and between parameters. There was a statistically significant difference between the control group of healthy subjects and COPD group in all parameters (p<0.05). A negative and correlation between oxidant MDA and antioxidant GSH parameters was determined (p=-0.394). CONCLUSIONS As a result, it was seen that oxidative balance changed in the patient group and cellular immunity increased. When the obtained data and literature are taken into account, these changes occurring in oxidative balance and cellular immunity are of importance in determining the development in the pathogenesis of COPD, treatment op - tions and their risks for heart disease in advance.
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Affiliation(s)
- Emre Avci
- Faculty of Science and Arts, Department of Molecular Biology and Genetics, Biochemistry, Hitit University, Corum, Turkey
| | - Gulcin Alp Avci
- Faculty of Science and Arts, Department of Molecular Biology and Genetics, Molecular Microbiology, Hitit University, Corum, Turkey
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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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14
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Dye JA, Gibbs-Flournoy EA, Richards JH, Norwood J, Kraft K, Hatch GE. Neonatal rat age, sex and strain modify acute antioxidant response to ozone. Inhal Toxicol 2017; 29:291-303. [PMID: 28880688 DOI: 10.1080/08958378.2017.1369602] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Chronic obstructive pulmonary disease (COPD) is the third leading cause of death in the US and its impact continues to increase in women. Oxidant insults during critical periods of early life appear to increase risk of COPD through-out the life course. To better understand susceptibility to early life exposure to oxidant air pollutants we used Fisher (F344), Sprague-Dawley (SD) and Wistar (WIS) male and female neonatal rat pups to assess: (A) if strain (i.e. genetics), sex, or stage of early life development affected baseline lung antioxidant or redox enzyme levels and (B) if these same factors modulated antioxidant responsiveness to acute ozone exposure (1 ppm × 2 h) on post-natal day (PND) 14, 21, or 28. In air-exposed pups from PND14-28, some parameters were unchanged (e.g. uric acid), some decreased (e.g. superoxide dismutase), while others increased (e.g. glutathione recycling enzymes) especially post-weaning. Lung total glutathione levels decreased in F344 and SD pups, but were relatively unchanged in WIS pups. Post-ozone exposure, data suggest that: (1) the youngest (PND14) pups were the most adversely affected; (2) neonatal SD and WIS pups, especially females, were more prone to ozone effects than males of the same age and (3) F344 neonates (females and males) were less susceptible to oxidative lung insult, not unlike F344 adults. Differences in antioxidant levels and responsiveness between sexes and strains and at different periods of development may provide a basis for assessing later life health outcomes - with implications for humans with analogous genetic or dietary-based lung antioxidant deficits.
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Affiliation(s)
- Janice A Dye
- a National Health and Environmental Research Laboratory (NHEERL) Office of Research and Development , U.S. Environmental Protection Agency , Research Triangle Park, Durham , NC , USA
| | - Eugene A Gibbs-Flournoy
- b ORISE, Office of Research and Development , U.S. Environmental Protection Agency , Research Triangle Park , NC , USA
| | - Judy H Richards
- a National Health and Environmental Research Laboratory (NHEERL) Office of Research and Development , U.S. Environmental Protection Agency , Research Triangle Park, Durham , NC , USA
| | - Joel Norwood
- a National Health and Environmental Research Laboratory (NHEERL) Office of Research and Development , U.S. Environmental Protection Agency , Research Triangle Park, Durham , NC , USA
| | | | - Gary E Hatch
- a National Health and Environmental Research Laboratory (NHEERL) Office of Research and Development , U.S. Environmental Protection Agency , Research Triangle Park, Durham , NC , USA
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15
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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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Arellano-Orden E, Calero-Acuña C, Cordero JA, Abad-Arranz M, Sánchez-López V, Márquez-Martín E, Ortega-Ruiz F, López-Campos JL. Specific networks of plasma acute phase reactants are associated with the severity of chronic obstructive pulmonary disease: a case-control study. Int J Med Sci 2017; 14:67-74. [PMID: 28138311 PMCID: PMC5278661 DOI: 10.7150/ijms.16907] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/20/2016] [Accepted: 11/01/2016] [Indexed: 12/25/2022] Open
Abstract
Objectives. A detailed understanding of the intricate relationships between different acute phase reactants (APRs) in chronic obstructive pulmonary disease (COPD) can shed new light on its clinical course. In this case-control study, we sought to identify the interaction networks of a number of plasma APRs in COPD, with a special focus on their association with disease severity. Methods. COPD cases and healthy smoking controls (3:1 ratio) were recruited in our outpatient pulmonary clinic. Cardiopulmonary exercise testing was used to rule out the presence of ischemic heart disease. All subjects were males as per protocol. Multiple plasma APRs - including α-2-macroglobulin, C-reactive protein (CRP), ferritin, fibrinogen, haptoglobin, procalcitonin (PCT), serum amyloid A (SAA), serum amyloid P, and tissue plasminogen activator (tPA) - were measured using commercial Acute Phase Bio-Plex Pro Assays and analyzed on the Bio-Plex manager software. Correlations between different APRs were investigated using a heat map. Network visualization and analyses were performed with the Cytoscape software platform. Results. A total of 96 COPD cases and 33 controls were included in the study. Plasma A2M, CRP, and SAP levels were higher in COPD patients than in controls. Circulating concentrations of haptoglobin and tPA were found to increase in parallel with the severity of the disease. Increasing disease severity was associated with distinct intricate networks of APRs, which were especially evident in advanced stages. Conclusions. We identified different networks of APRs in COPD, which were significantly associated with disease severity.
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Affiliation(s)
- Elena Arellano-Orden
- Instituto de Biomedicina de Sevilla (IBiS), Hospital Universitario Virgen del Rocío/Universidad de Sevilla, Seville, Spain
| | - Carmen Calero-Acuña
- Instituto de Biomedicina de Sevilla (IBiS), Hospital Universitario Virgen del Rocío/Universidad de Sevilla, Seville, Spain;; Unidad Médico-Quirúrgica de Enfermedades Respiratorias, Hospital Virgen del Rocío. Seville, Spain;; CIBER de Enfermedades Respiratorias (CIBERES), Instituto de Salud Carlos III, Madrid, Spain
| | - Juan Antonio Cordero
- Instituto de Biomedicina de Sevilla (IBiS), Hospital Universitario Virgen del Rocío/Universidad de Sevilla, Seville, Spain
| | - María Abad-Arranz
- Unidad Médico-Quirúrgica de Enfermedades Respiratorias, Hospital Virgen del Rocío. Seville, Spain
| | - Verónica Sánchez-López
- Instituto de Biomedicina de Sevilla (IBiS), Hospital Universitario Virgen del Rocío/Universidad de Sevilla, Seville, Spain
| | - Eduardo Márquez-Martín
- Instituto de Biomedicina de Sevilla (IBiS), Hospital Universitario Virgen del Rocío/Universidad de Sevilla, Seville, Spain;; Unidad Médico-Quirúrgica de Enfermedades Respiratorias, Hospital Virgen del Rocío. Seville, Spain
| | - Francisco Ortega-Ruiz
- Instituto de Biomedicina de Sevilla (IBiS), Hospital Universitario Virgen del Rocío/Universidad de Sevilla, Seville, Spain;; Unidad Médico-Quirúrgica de Enfermedades Respiratorias, Hospital Virgen del Rocío. Seville, Spain;; CIBER de Enfermedades Respiratorias (CIBERES), Instituto de Salud Carlos III, Madrid, Spain
| | - José Luis López-Campos
- Instituto de Biomedicina de Sevilla (IBiS), Hospital Universitario Virgen del Rocío/Universidad de Sevilla, Seville, Spain;; Unidad Médico-Quirúrgica de Enfermedades Respiratorias, Hospital Virgen del Rocío. Seville, Spain;; CIBER de Enfermedades Respiratorias (CIBERES), Instituto de Salud Carlos III, Madrid, Spain
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Optimisation des effets de la réhabilitation respiratoire chez des patients BPCO par une supplémentation en antioxydants : résultats d’essai randomisé contrôlé en double insu. Rev Mal Respir 2017. [DOI: 10.1016/j.rmr.2016.10.126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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18
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Zinellu E, Zinellu A, Fois AG, Carru C, Pirina P. Circulating biomarkers of oxidative stress in chronic obstructive pulmonary disease: a systematic review. Respir Res 2016; 17:150. [PMID: 27842552 PMCID: PMC5109807 DOI: 10.1186/s12931-016-0471-z] [Citation(s) in RCA: 80] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2016] [Accepted: 11/04/2016] [Indexed: 12/14/2022] Open
Abstract
Chronic obstructive pulmonary disease (COPD) is a progressive condition characterized by airflow limitation associated with an abnormal inflammatory response of the lungs to noxious particles and gases, caused primarily by cigarette smoking. Increased oxidative burden plays an important role in the pathogenesis of COPD. There is a delicate balance between the toxicity of oxidants and the protective function of the intracellular and extracellular antioxidant defense systems, which is critically important for the maintenance of normal pulmonary functions. Several biomarkers of oxidative stress are available and have been evaluated in COPD. In this review, we summarize the main literature findings about circulating oxidative stress biomarkers, grouped according to their method of detection, measured in COPD subjects.
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Affiliation(s)
- Elisabetta Zinellu
- Department of Respiratory Diseases, Azienda Ospedaliero Universitaria di Sassari, Sassari, Italy
| | - Angelo Zinellu
- Department of Biomedical Sciences, University of Sassari, Sassari, Italy
| | - Alessandro Giuseppe Fois
- Department of Respiratory Diseases, Azienda Ospedaliero Universitaria di Sassari, Sassari, Italy
| | - Ciriaco Carru
- Quality Control Unit, University Hospital of Sassari (AOU SS); Department of Biomedical Sciences, University of Sassari, Sassari, Italy
| | - Pietro Pirina
- Department of Respiratory Diseases, Azienda Ospedaliero Universitaria di Sassari, Sassari, Italy.
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Oxidative Stress Markers in Sputum. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2016; 2016:2930434. [PMID: 26885248 PMCID: PMC4738959 DOI: 10.1155/2016/2930434] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/17/2015] [Revised: 10/15/2015] [Accepted: 10/18/2015] [Indexed: 01/12/2023]
Abstract
Although oxidative stress is thought to play a pivotal role in the pathogenesis of inflammatory airway diseases, its assessment in clinical practice remains elusive. In recent years, it has been conceptualized that oxidative stress markers in sputum should be employed to monitor oxidative processes in patients with asthma, chronic obstructive pulmonary disease (COPD), or cystic fibrosis (CF). In this review, the use of sputum-based oxidative markers was explored and potential clinical applications were considered. Among lipid peroxidation-derived products, 8-isoprostane and malondialdehyde have been the most frequently investigated, while nitrosothiols and nitrotyrosine may serve as markers of nitrosative stress. Several studies have showed higher levels of these products in patients with asthma, COPD, or CF compared to healthy subjects. Marker concentrations could be further increased during exacerbations and decreased along with recovery of these diseases. Measurement of oxidized guanine species and antioxidant enzymes in the sputum could be other approaches for assessing oxidative stress in pulmonary patients. Collectively, even though there are promising findings in this field, further clinical studies using more established detection techniques are needed to clearly show the benefit of these measurements in the follow-up of patients with inflammatory airway diseases.
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