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Lin CM, Huang TH, Chi MC, Guo SE, Lee CW, Hwang SL, Shi CS. N-acetylcysteine alleviates fine particulate matter (PM2.5)-induced lung injury by attenuation of ROS-mediated recruitment of neutrophils and Ly6C high monocytes and lung inflammation. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2022; 239:113632. [PMID: 35594827 DOI: 10.1016/j.ecoenv.2022.113632] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2021] [Revised: 05/06/2022] [Accepted: 05/07/2022] [Indexed: 06/15/2023]
Abstract
BACKGROUND Exposure to particulate matter (PM) may contribute to lung inflammation and injury. The therapeutic effect of N-acetylcysteine (NAC), a well-known antioxidant, with regards to the prevention and treatment of fine PM (PM2.5)-induced lung injury is poorly understood. This study aimed to determine the effect of PM2.5 on the recruitment of neutrophils and Ly6Chigh monocytes into lung alveoli and the production of proinflammatory proteins by stimulating the generation of reactive oxygen species (ROS), and to investigate the therapeutic effect of NAC on PM2.5-induced lung injury. METHODS C57BL/6 mice were exposed to a single administration of PM2.5 (200 μg/100 μl/mouse) or phosphate-buffered saline (control) via intratracheal instillation. The mice were injected intratracheally via a microsprayer aerosolizer with NAC (20 or 40 mg/kg) 1 h before PM2.5 instillation and 24 h after PM2.5 instillation. Total protein, VEGF, IL-6, and TNF-α in bronchoalveolar lavage fluid (BALF) were measured. Oxidative stress was evaluated by determining levels of malondialdehyde (MDA) and nitrite in BALF. Flow cytometric analysis was used to identify and quantify neutrophils and Ly6Chigh and Ly6Clow monocyte subsets. RESULTS Neutrophil count, total protein, and VEGF content in BALF significantly increased after PM2.5 exposure and reached the highest level on day 2. Increased levels of TNF-alpha, IL-6, nitrite, and MDA in BALF were also noted. Flow cytometric analysis showed increased recruitment of neutrophils and Ly6Chigh, but not Ly6Clow monocytes, into lung alveoli. Treatment with NAC via the intratracheal spray significantly attenuated the recruitment of neutrophils and Ly6Chigh monocytes into lung alveoli in PM2.5-treated mice in a dose-dependent manner. Furthermore, NAC significantly attenuated the production of total protein, VEGF, nitrite, and MDA in the mice with PM2.5-induced lung injury in a dose-dependent manner. CONCLUSION PM2.5-induced lung injury caused by the generation of oxidative stress led to the recruitment of neutrophils and Ly6Chigh monocytes, and production of inflammatory proteins. NAC treatment alleviated PM2.5-induced lung injury by attenuating the ROS-mediated recruitment of neutrophils and Ly6Chigh monocytes and lung inflammation.
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Affiliation(s)
- Chieh-Mo Lin
- Department of Pulmonary and Critical Care Medicine, Chiayi Chang Gung Memorial Hospital, Chang Gung Medical Foundation, Puzi City, Chiayi County, Taiwan; Graduate Institute of Clinical Medical Sciences, College of Medicine, Chang Gung University, Taoyuan City, Taiwan; Department of Nursing, Chang Gung University of Science and Technology, Chiayi Campus, Puzi City, Chiayi County, Taiwan
| | - Tzu-Hsiung Huang
- Graduate Institute of Clinical Medical Sciences, College of Medicine, Chang Gung University, Taoyuan City, Taiwan; Department of Respiratory Therapy, Chang Gung Memorial Hospital, Puzi City, Chiayi County, Taiwan
| | - Miao-Ching Chi
- Department of Pulmonary and Critical Care Medicine, Chiayi Chang Gung Memorial Hospital, Chang Gung Medical Foundation, Puzi City, Chiayi County, Taiwan; Chronic Disease and Health Promotion Research Center, Chang Gung University of Science and Technology, Puzi City, Chiayi County, Taiwan; Department of Respiratory Care, Chang Gung University of Science and Technology, Puzi City, Chiayi County, Taiwan; Department of Safety Health and Environmental Engineering, Ming Chi University of Technology, New Taipei City, Taiwan
| | - Su-Er Guo
- Department of Pulmonary and Critical Care Medicine, Chiayi Chang Gung Memorial Hospital, Chang Gung Medical Foundation, Puzi City, Chiayi County, Taiwan; Chronic Disease and Health Promotion Research Center, Chang Gung University of Science and Technology, Puzi City, Chiayi County, Taiwan; Department of Nursing and Graduate Institute of Nursing, College of Nursing, Chang Gung University of Science and Technology, Puzi City, Chiayi County, Taiwan; Department of Safety Health and Environmental Engineering, Ming Chi University of Technology, New Taipei City, Taiwan
| | - Chiang-Wen Lee
- Department of Safety Health and Environmental Engineering, Ming Chi University of Technology, New Taipei City, Taiwan; Department of Nursing, Division of Basic Medical Sciences, Chronic Diseases and Health Promotion Research Center, Chang Gung University of Science and Technology, Puzi City, Chiayi County, Taiwan; College of Medicine, Chang Gung University, Taoyuan City, Taiwan; Department of Orthopaedic Surgery, Chang Gung Memorial Hospital, Puzi City, Chiayi County, Taiwan
| | - Su-Lun Hwang
- Department of Pulmonary and Critical Care Medicine, Chiayi Chang Gung Memorial Hospital, Chang Gung Medical Foundation, Puzi City, Chiayi County, Taiwan; Chronic Disease and Health Promotion Research Center, Chang Gung University of Science and Technology, Puzi City, Chiayi County, Taiwan; Department of Nursing and Graduate Institute of Nursing, College of Nursing, Chang Gung University of Science and Technology, Puzi City, Chiayi County, Taiwan
| | - Chung-Sheng Shi
- Graduate Institute of Clinical Medical Sciences, College of Medicine, Chang Gung University, Taoyuan City, Taiwan; Division of Colon and Rectal Surgery, Department of Surgery, Chang Gung Memorial Hospital, Puzi City, Chiayi County, Taiwan.
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Chang HT, Jan CR, Liang WZ. Protective effects of a phenolic glycoside compound curculigoside on H 2 O 2 -induced oxidative stress and cytotoxicity in normal human breast epithelial cells. J Funct Foods 2018. [DOI: 10.1016/j.jff.2017.12.009] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
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McClendon CJ, Gerald CL, Waterman JT. Farm animal models of organic dust exposure and toxicity: insights and implications for respiratory health. Curr Opin Allergy Clin Immunol 2015; 15:137-44. [PMID: 25636160 PMCID: PMC4783132 DOI: 10.1097/aci.0000000000000143] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
PURPOSE OF REVIEW Modern food animal production is a major contributor to the global economy, owing to advanced intensive indoor production facilities aimed at increasing market readiness and profit. Consequences of these advances are accumulation of dusts, gases, and microbial products that diminish air quality within production facilities. Chronic inhalation exposure contributes to onset and exacerbation of respiratory symptoms and diseases in animals and workers. This article reviews literature regarding constituents of farm animal production facility dusts, animal responses to production building and organic dust exposure, and the effect of chronic inhalation exposure on pulmonary oxidative stress and inflammation. RECENT FINDINGS Porcine models of production facility and organic dust exposures reveal striking similarities to observations of human cells, tissues, and clinical data. Oxidative stress plays a key role in mediating respiratory diseases in animals and humans, and enhancement of antioxidant levels through nutritional supplements can improve respiratory health. SUMMARY Pigs are well adapted to the exposures common to swine production buildings and thus serve as excellent models for facility workers. Insight for understanding mechanisms governing organic dust associated respiratory diseases may come from parallel comparisons between farmers and the animals they raise.
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Affiliation(s)
- Chakia J. McClendon
- Department of Animal Sciences, North Carolina Agricultural and Technical State University, Greensboro, NC
- Department of Energy and Environmental Systems, North Carolina Agricultural and Technical State University, Greensboro, NC
| | - Carresse L. Gerald
- Pulmonary and Critical Care Medicine, University of Nebraska Medical Center, Omaha, NE
| | - Jenora T. Waterman
- Department of Animal Sciences, North Carolina Agricultural and Technical State University, Greensboro, NC
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Tse HN, Raiteri L, Wong KY, Ng LY, Yee KS, Tseng CZS. Benefits of High-Dose N-Acetylcysteine to Exacerbation-Prone Patients With COPD. Chest 2014; 146:611-623. [DOI: 10.1378/chest.13-2784] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
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Shen Y, Cai W, Lei S, Zhang Z. Effect of high/low dose N-acetylcysteine on chronic obstructive pulmonary disease: a systematic review and meta-analysis. COPD 2014; 11:351-8. [PMID: 24378052 DOI: 10.3109/15412555.2013.858315] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
BACKGROUND Chronic obstructive pulmonary disease (COPD) is a leading cause of mortality and morbidity worldwide, characterised by persistent airflow limitation, mucus hypersecretion, oxidative stress and airway inflammation. N-acetylcysteine (NAC) have anti-oxidant and anti-inflammatory properties, which have been shown an uncertain benefit in COPD patients. METHOD Systematic searches were conducted in Cochrane, Medline and Embase electronic databases. A meta-analysis was performed to evaluate the different effect between high and low-dose NAC treatment on COPD exacerbation. RESULTS This review yielded 11 studies. The methodological quality of included studies were scored using the Jadad score, with a scale of 1 to 5 (score of 5 being the highest). Data showed high-dose NAC can reduce both the total number of exacerbations (RR = 0.59, 0.47 to 0.74, 95%CI, p < 0.001) and the proportion of patients with at least one exacerbation (RR = 0.76, 0.59 to 0.98, 95%CI, p = 0.03). In the low-dose group, subgroup with jadad ≤ 3 showed a significant decrease (RR = 0.69, 0.61 to 0.77, 95%CI, p < 0.001) in the proportion of patients with exacerbation, the other subgroup with Jadad score > 3 showed no significant decrease (RR = 0.98, 0.90 to 1.06, 95%CI, p = 0.59). And low-dose NAC showed no benefit in the total number of exacerbations (RR = 0.97, 0.68 to 1.37, 95%CI, p = 0.85). Neither high nor low-dose NAC treatment showed benefit in forced expiratory volume in one second(FEV1)(WMD = 1.08, -9.97 to 12.13, 95%CI, p = 0.85). CONCLUSION Long-term high-dose NAC treatment may lead to a lower rate of exacerbations. But the effect of low-dose NAC treatment remains uncertain. Further researches are needed to confirm this outcome and to clarify its mechanisms.
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Affiliation(s)
- Yanfei Shen
- 1Dongyang People's Hospital, Respiratory Medicine, Zhejiang, P.R. China
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Tse HN, Raiteri L, Wong KY, Yee KS, Ng LY, Wai KY, Loo CK, Chan MH. High-dose N-acetylcysteine in stable COPD: the 1-year, double-blind, randomized, placebo-controlled HIACE study. Chest 2013; 144:106-118. [PMID: 23348146 DOI: 10.1378/chest.12-2357] [Citation(s) in RCA: 107] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
BACKGROUND The mucolytic and antioxidant effects of N-acetylcysteine (NAC) may have great value in COPD treatment. However, beneficial effects have not been confirmed in clinical studies, possibly due to insufficient NAC doses and/or inadequate outcome parameters used. The objective of this study was to investigate high-dose NAC plus usual therapy in Chinese patients with stable COPD. METHODS The 1-year HIACE (The Effect of High Dose N-acetylcysteine on Air Trapping and Airway Resistance of Chronic Obstructive Pulmonary Disease-a Double-blinded, Randomized, Placebo-controlled Trial) double-blind trial conducted in Kwong Wah Hospital, Hong Kong, randomized eligible patients aged 50 to 80 years with stable COPD to NAC 600 mg bid or placebo after 4-week run-in. Lung function parameters, symptoms, modified Medical Research Council (mMRC) dyspnea and St. George's Respiratory Questionnaire (SGRQ) scores, 6-min walking distance (6MWD), and exacerbation and admission rates were measured at baseline and every 16 weeks for 1 year. RESULTS Of 133 patients screened, 120 were eligible (93.2% men; mean age, 70.8±0.74 years; %FEV1 53.9±2.0%). Baseline characteristics were similar in the two groups. At 1 year, there was a significant improvement in forced expiratory flow 25% to 75% (P=.037) and forced oscillation technique, a significant reduction in exacerbation frequency (0.96 times/y vs 1.71 times/y, P=.019), and a tendency toward reduction in admission rate (0.5 times/y vs 0.8 times/y, P=.196) with NAC vs placebo. There were no significant between-group differences in mMRC dypsnea score, SGRQ score, and 6MWD. No major adverse effects were reported. CONCLUSION In this study, 1-year treatment with high-dose NAC resulted in significantly improved small airways function and decreased exacerbation frequency in patients with stable COPD. TRIAL REGISTRY ClinicalTrials.gov; No.: NCT01136239; URL: www.clinicaltrials.gov.
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Affiliation(s)
| | - Luca Raiteri
- Medical Department, Innovation & Medical Sciences, Zambon Company SpA, Bresso, Italy
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Milara J, Juan G, Peiró T, Serrano A, Cortijo J. Neutrophil activation in severe, early-onset COPD patients versus healthy non-smoker subjects in vitro: effects of antioxidant therapy. ACTA ACUST UNITED AC 2011; 83:147-58. [PMID: 22094549 DOI: 10.1159/000332834] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2010] [Accepted: 08/11/2011] [Indexed: 01/09/2023]
Abstract
BACKGROUND Neutrophils and oxidative stress have been implicated in the pathogenesis of COPD. Severe, early-onset COPD is characterized by a rapid decline in the lung function at an early age; however, nothing is known about neutrophil activation in COPD patients. OBJECTIVES The aim of this study was to evaluate peripheral blood neutrophil activation in severe, early-onset COPD patients versus healthy non-smokers and the effect of N-acetyl-L-cysteine (NAC) on neutrophil activation in vitro. METHODS Neutrophils were isolated from 15 severe, early-onset COPD patients and 15 age-matched healthy subjects and stimulated with N-formyl-Met-Leu-Phe (fMLP) in the presence or absence of NAC (10 μM to 10 mM). Neutrophil chemotaxis, elastase release, reactive oxygen species (ROS), intracellular thiols and apoptosis were measured by Boyden chamber, spectrofluorometry, CMFDA and H2DCF-DA dyes and by annexin V-FITC, respectively. RESULTS Chemotaxis of peripheral blood neutrophils from COPD patients in response to fMLP was 30% more increased than that observed in healthy subjects. Elastase release in response to fMLP was 2-fold higher in neutrophils from COPD patients versus healthy subjects. Intracellular thiol levels were 30% lower in COPD and ROS was approximately 30% higher in COPD versus healthy neutrophils. Spontaneous apoptosis showed no differences in both groups of patients and fMLP-induced apoptosis was higher in COPD. Pre-treatment with the antioxidant NAC effectively attenuated neutrophil chemotaxis, elastase release and ROS as well as effectively increased thiol levels in COPD. CONCLUSIONS Neutrophils in severe, early-onset COPD patients are highly activated and this is alleviated by NAC in vitro.
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Affiliation(s)
- Javier Milara
- Research Unit, University General Hospital Consortium, and Department of Medicine, Faculty of Medicine, University of Valencia, Valencia, Spain.
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Löhrke B, Xu J, Weitzel JM, Krüger B, Goldammer T, Viergutz T. N-acetylcysteine impairs survival of luteal cells through mitochondrial dysfunction. Cytometry A 2010; 77:310-20. [PMID: 20151456 DOI: 10.1002/cyto.a.20873] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
N-acetylcysteine (NAC) is known as an antioxidant and used for mucus viscosity reduction. However, this drug prevents or induces cell death depending on the cell type. The response of steroidogenic luteal cells to NAC is unknown. Our data shows that NAC can behave as an antioxidant or prooxidant in dependency on the concentration and mitochondrial energization. NAC elevated the flowcytometric-measured portion of hypodiploid (dying) cells. This rise was completely abolished by aurintricarboxylic acid, an inhibitor of topoisomerase II. NAC increased the secretion of nitric oxide and cellular nitrotyrosine. An image analysis indicated that cells pretreated with NAC and loaded with DHR showed a fluorescent structure probably elicited by the oxidative product of DHR, rhodamine 123 that sequesters mitochondrially. Pretreating luteal cells with NAC or adding NAC directly to mitochondrial fractions followed by assessing the mitochondrial transmembrane potential difference (Deltapsi) by the JC-1 technique demonstrated a marked decrease in Deltapsi. A protonophore restored Deltapsi and rotenone (an inhibitor of respiratory chain complex I) inhibited mitochondrial recovering. Thus, in steroidogenic luteal cells from healthy mature corpus luteum, NAC impairs cellular survival by interfering with mitochondrial metabolism. The protonophore-induced recovering of NAC-provoked decrease in Deltapsi indicates that an ATP synthase-favored route of H(+) re-entry to the matrix is essentially switched off by NAC while other respiratory chain complexes remain intact. These data may be important for therapeutic timing of treatments with NAC. (c) 2010 International Society for Advancement of Cytometry.
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Affiliation(s)
- Berthold Löhrke
- Research Institute for the Biology of Farm Animals, Dummerstorf, Germany
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Decreased H2O2 in exhaled breath condensate during pregnancy—Feasible effect of 17β-estradiol. Respir Physiol Neurobiol 2008; 162:152-9. [DOI: 10.1016/j.resp.2008.06.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2008] [Revised: 05/05/2008] [Accepted: 06/04/2008] [Indexed: 11/17/2022]
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O'Neill HC, Rancourt RC, White CW. Lipoic acid suppression of neutrophil respiratory burst: effect of NADPH. Antioxid Redox Signal 2008; 10:277-85. [PMID: 18158760 DOI: 10.1089/ars.2007.1890] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
Lipoic acid (LA) and its reduced product dihydrolipoic acid (DHLA) are potent antioxidants with capacity to scavenge reactive oxygen species (ROS) and recycle endogenous antioxidants. LA may increase cellular glutathione (GSH), an antioxidant lacking in the lung's epithelial lining fluid in lung disorders such as idiopathic pulmonary fibrosis (IPF). Neutrophils (PMN) are key innate responders and are pivotal in clearing bacterial infection, therefore it is crucial to understand the impact LA may have on their function. Circulating neutrophils were isolated from healthy volunteers and pretreated with LA or diluent. Cells were subsequently activated with phorbol 12-myristate 13-acetate (PMA, 100 ng/ml) to induce ROS production. SOD-inhibitable reduction of acetylated cytochrome c demonstrated the PMA-dependent respiratory burst was suppressed by LA. Oxygen consumption also was diminished when PMA-stimulated cells were pretreated with LA. PMN respiratory burst was partially restored by addition of NADPH but not other pyridine nucleotides. LA did not inhibit glucose-6-phosphate dehydrogenase activity of PMN. These data together suggest that the reduction of LA to DHLA using cellular NADPH may limit the capacity of the PMN NADPH oxidase to produce superoxide. Further studies will be required to determine if LA can diminish excessive superoxide produced by PMN and/or alveolar macrophages in IPF or relevant disease models in vivo.
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Affiliation(s)
- Heidi C O'Neill
- Department of Pharmaceutical Sciences, Program in Toxicology, School of Pharmacy, University of Colorado Health Sciences Center, Denver, Colorado, USA
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Martinez-Losa M, Cortijo J, Juan G, O'Connor JE, Sanz MJ, Santangelo F, Morcillo EJ. Inhibitory effects of N-acetylcysteine on the functional responses of human eosinophils in vitro. Clin Exp Allergy 2007; 37:714-22. [PMID: 17456219 DOI: 10.1111/j.1365-2222.2007.02694.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
BACKGROUND Oxidative stress appears to be relevant in the pathogenesis of inflammation in allergic diseases like bronchial asthma. Eosinophils are oxidant-sensitive cells considered as key effectors in allergic inflammation. OBJECTIVE The aim of this work was to study the effects of the clinically used antioxidant N-acetyl-L-cysteine (NAC) on the functional responses of human-isolated eosinophils. METHODS Human eosinophils were purified from the blood of healthy donors by a magnetic bead separation system. The effects of NAC were investigated on the generation of reactive oxygen species (chemiluminescence and flow cytometry), Ca(2+) signal (fluorimetry), intracellular glutathione (GSH; flow cytometry), p47(phox)-p67(phox) translocation (Western blot) and eosinophil cationic protein (ECP) release (radioimmunoassay). RESULTS NAC (0.1-1 mm) inhibited the extracellular generation of oxygen species induced by N-formyl-L-methionyl-L-leucyl-L-phenylalanine (fMLP) and eotaxin (in the presence of IL-5) with -logIC(50) values of 3.61+/-0.03 and 3.36+/-0.09, respectively. Also, the intracellular generation of hydrogen peroxide was virtually abolished by NAC (0.5-1 mm). NAC (1 mm) did not alter the fMLP-induced Ca(2+) signal but augmented the eosinophil content of reduced GSH and inhibited p47(phox)-p67(phox) translocation. NAC inhibited the release of ECP ( approximately 90% inhibition at 1 mm) from fMLP-activated eosinophils. CONCLUSION Inhibition by NAC of human eosinophil functions in vitro is potentially useful in the treatment of allergic inflammation.
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Affiliation(s)
- M Martinez-Losa
- Department of Pharmacology, University of Valencia, Valencia, Spain
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Sadowska AM, Manuel-Y-Keenoy B, De Backer WA. Antioxidant and anti-inflammatory efficacy of NAC in the treatment of COPD: discordant in vitro and in vivo dose-effects: a review. Pulm Pharmacol Ther 2006; 20:9-22. [PMID: 16458553 DOI: 10.1016/j.pupt.2005.12.007] [Citation(s) in RCA: 234] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/17/2005] [Accepted: 12/16/2005] [Indexed: 01/07/2023]
Abstract
In order to develop efficient therapeutic regimes for chronic obstructive pulmonary disease (COPD), N-acetylcysteine (NAC) has been tested as a medication which can suppress various pathogenic processes in this disease. Besides its well-known and efficient mucolytic action, NAC meets these needs by virtue of its antioxidant and anti-inflammatory modes of action. NAC is a thiol compound which by providing sulfhydryl groups, can act both as a precursor of reduced glutathione and as a direct ROS scavenger, hence regulating the redox status in the cells. In this way it can interfere with several signaling pathways that play a role in regulating apoptosis, angiogenesis, cell growth and arrest and inflammatory response. Overall, the antioxidant effects of NAC are well documented in in vivo and in vitro studies. It successfully inhibits oxidative stress at both high and low concentrations, under acute (in vitro) and chronic administration (in vivo). With regard to its anti-inflammatory action, in contrast, the effects of NAC differ in vivo and in vitro and are highly dose-dependent. In the in vitro settings anti-inflammatory effects are seen at high but not at low concentrations. On the other hand, some long-term effectiveness is reported in several in vivo studies even at low dosages. Increasing the dose seems to improve NAC bioavailability and may also consolidate some of its effects. In this way, the effects that are observed in the clinical and in vivo studies do not always reflect the success of the in vitro experiments. Furthermore, the results obtained with healthy volunteers do not always provide incontrovertible proof of its usefulness in COPD especially when number of exacerbations and changes in lung function are chosen as the primary outcomes. Despite these considerations and in view of the present lack of effective therapies to inhibit disease progression in COPD, NAC and its derivatives, because of their multiple molecular modes of action, remain promising medication once doses and route of administration are optimized.
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Affiliation(s)
- A M Sadowska
- Department of Respiratory Medicine, University of Antwerp, Universiteitsplein 1, 2610 Antwerp, Belgium.
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Mozdzan M, Szemraj J, Rysz J, Stolarek RA, Nowak D. Anti-oxidant activity of spermine and spermidine re-evaluated with oxidizing systems involving iron and copper ions. Int J Biochem Cell Biol 2006; 38:69-81. [PMID: 16107320 DOI: 10.1016/j.biocel.2005.07.004] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2005] [Accepted: 07/11/2005] [Indexed: 11/24/2022]
Abstract
This study was designed to investigate the direction of redox reactions of spermine and spermidine in the presence of iron and copper. The redox activity of spermine and spermidine was assessed using a variety of methods, including their ability to: (1) reduce Fe(3+) to Fe(2+) ions; (2) protect deoxyribose from oxidation by Fe(2+)-ethylene diaminetetraacetic acid, Fe(3+)-ethylene diaminetetraacetic acid systems with and without H(2)O(2); (3) protect DNA from damage caused by Cu(2+)-H(2)O(2), and Fe(2+)-H(2)O(2) with and without ascorbic acid; (4) inhibit H(2)O(2)-peroxidase-induced luminol dependent chemiluminescence; (5) scavenge diphenyl-picryl-hydrazyl radical. Spermine and spermidine at concentration 1mM reduced 1.8+/-0.3 and 2.5+/-0.1 nmol of Fe(3+) ions during 20 min incubation. Both polyamines enhanced deoxyribose oxidation. The highest enhancement of 7.6-fold in deoxyribose degradation was found for combination of spermine with Fe(3+)-ethylene diaminetetraacetic acid. An 10mM spermine and spermidine decreased CuSO(4)-H(2)O(2)-ascorbic acid- and FeSO(4)-H(2)O(2)-ascorbic-induced DNA damage by 73+/-6, 69+/-4% and 90+/-5, 53+/-4%, respectively. They did not protect DNA from CuSO(4)-H(2)O(2) and FeSO(4)-H(2)O(2). Spermine apparently increased the CuSO(4)-H(2)O(2)-dependent injury to DNA. Polyamines attenuated H(2)O(2)-peroxidase-induced luminol dependent chemiluminescence. Total light emission from specimens containing 10mM spermine or spermidine was attenuated by 85.3+/-1.5 and 87+/-3.6%. During 20 min incubation 1mM spermine or spermidine decomposed 8.1+/-1.4 and 9.2+/-1.8% of diphenyl-picryl-hydrazyl radical. These results demonstrate that polyamines of well known anti-oxidant properties may act as pro-oxidants and enhance oxidative damage to DNA components in the presence of free iron ions and H(2)O(2).
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Affiliation(s)
- Monika Mozdzan
- Department of Experimental and Clinical Physiology, Institute of Physiology and Biochemistry, Medical University of Lodz, 6/8 Mazowiecka Street, 92-215 Lodz, Poland
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Duez JM, Péchinot A, Neuwirth C. [Modulatory effect of antimicrobial agents or aminoacids on the oxidative burst of polymorphonuclear neutrophils triggered by formylmethionyl-leucyl-phenylalanine (fMLP)]. ACTA ACUST UNITED AC 2005; 54:37-43. [PMID: 16376177 DOI: 10.1016/j.patbio.2004.10.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2004] [Accepted: 10/25/2004] [Indexed: 11/18/2022]
Abstract
We have compared the interplay of several antimicrobial agents and aminoacids on the neutrophil respiratory burst in response to formylmethionyl-leucyl-phenylalanine (fMLP), a chemoattractant. Mainly, an inhibitory effect has been observed in the penicillin family of agents and an enhancing effect in the cephalosporin family of agents. The molecules in which the sulfur numbered 1 in the 6-APA or 7-ACA nucleus was replaced by a carbon or an oxygen, had a different effect as compared with the other members of the family. The modulatory effects of ampicillin and cephalothine were not significant at a concentration lower than 10 mg/l and the effect of cephalothine looked maximum at 20-40 mg/l. If studies in cell-free systems demonstrated that the inhibitory effect of some antimicrobials could be due to a direct oxidant-scavenger activity mainly of HOCl, only hypotheses are proposed to explain the enhancing activity of the others. It could be in relation with (i) a synergistic effect upon fMLP receptor leading to an increase in H(2)O(2)/HOCl production or (ii) the generation of new oxydant products originating in cephalosporin lysis under HOCl attack, which would be able to react with luminol. The interplay of antimicrobial agents with the respiratory burst measured outside the cells probably has no therapeutic consequences because the bactericidal activity of neutrophils is achieved inside phagosomes where few agents are known to come into and where chemical conditions are different. On the opposite, in clinical use, this interplay could be interesting to study for a prevention of side effects.
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Affiliation(s)
- J-M Duez
- Laboratoire de bactériologie, CHU de Dijon 2, boulevard Mal-de-Lattre-de-Tassigny, BP 77908, 21079 Dijon cedex, France.
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Real-time monitoring of reactive oxygen species production during differentiation of human monocytic cell lines (THP-1). Anal Chim Acta 2005. [DOI: 10.1016/j.aca.2005.06.034] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Grodzińska L, Starzyk D, Bieroń K, Goszcz A, Korbut R. Antioxidant Properties of Carnosine Re-Evaluated with Oxidizing Systems Involving Iron and Copper Ions. Basic Clin Pharmacol Toxicol 2005; 96:413-9. [PMID: 15910404 DOI: 10.1111/j.1742-7843.2005.pto_03.x] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Carnosine has antioxidant properties and is efficient in the treatment of chemically-induced inflammatory lesions in animals. However, some studies question its biological significance as antioxidant and show lack of protection and even pro-oxidant effect of carnosine in systems containing nickel and iron ions. The ability of carnosine to: (1) reduce Fe(3+) into Fe(2+) ions; (2) protect deoxyribose from oxidation by Fe(2+)-, Fe(3+)-, and Cu(2+)-H(2)O(2)-EDTA systems; (3) protect DNA from damage caused by Cu(2+)-, and Fe(2+)-H(2)O(2)-ascorbate systems; (4) inhibit HClO- and H(2)O(2)-peroxidase-induced luminol dependent chemiluminescence was tested in vitro. At concentration 10 mM carnosine reduced 16.6+/-0.5 nmoles of Fe(3+) into Fe(2+) ions during 20 min. incubation and added to plasma significantly increased its ferric reducing ability. Inhibition of deoxyribose oxidation by 10 mM carnosine reached 56+/-5, 40+/-11 and 30+/-11% for systems containing Fe(2+), Fe(3+) and Cu(2+) ions, respectively. The damage to DNA was decreased by 84+/-9 and 61+/-14% when Cu(2+)-, and Fe(2+)-H(2)O(2)-ascorbate systems were applied. Combination of 10 mM histidine with alanine or histidine alone (but not alanine) enhanced 1.3 and 2.3 times (P<0.05) the DNA damage induced by Fe(2+)-H(2)O(2)-ascorbate. These amino acids added to 10 mM carnosine decreased 3.1-fold (P<0.05) its protective effect on DNA. Carnosine at 10 and 20 mM decreased by more than 90% light emission from both chemiluminescent systems. It is concluded that carnosine has significant antioxidant activity especially in the presence of transition metal ions. However, hydrolysis of carnosine with subsequent histidine release may be responsible for some pro-oxidant effects.
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Affiliation(s)
- Lilia Grodzińska
- Department of Pharmacology, Department of Clinical Pharmacology, Jagiellonian University School of Medicine, 31-531 Cracow, 16 Grzegorzecka, Poland
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Szkudlarek U, Zdziechowski A, Witkowski K, Kasielski M, Luczyńska M, Luczyński R, Sarniak A, Nowak D. Effect of inhaled N-acetylcysteine on hydrogen peroxide exhalation in healthy subjects. Pulm Pharmacol Ther 2004; 17:155-62. [PMID: 15123225 DOI: 10.1016/j.pupt.2004.01.007] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/14/2003] [Revised: 11/28/2003] [Accepted: 01/28/2004] [Indexed: 11/22/2022]
Abstract
N-acetylcysteine (NAC) has antioxidant properties and its oral administration decreased H(2)O(2) exhalation in patients with chronic obstructive pulmonary disease. In this study we tested whether inhaled NAC could suppress H(2)O(2) levels in exhaled breath condensate (EBC) of eight healthy subjects that have never smoked (never-smokers). Original NAC solution (ACC vial, 300 mg NAC in 3 ml solvent), NAC-placebo (vehicle), sterile 0.9% NaCl or distilled water were nebulized via the pneumatic De Vilbiss nebulizer once daily every 7 days and H(2)O(2) and thiols exhalation was measured just before, 30 min and 3 h after the end of drug administration. Additional in vitro experiments were performed to evaluate NAC stability during nebulization, reactivity with H(2)O(2) and possible H(2)O(2) generation in aqueous NAC solutions. NAC almost completely abolished H(2)O(2) exhalation 30 min after inhalation (0.02+/-0.04 vs. 0.21+/-0.09 microM, p<0.001). However, 3 h later the H(2)O(2) levels raised 1.8-fold from baseline (p<0.01). Other inhaled solutions did not affect H(2)O(2) levels. Mean thiol concentration in EBC rose (p<0.05) after treatment with NAC and reached 1.03+/-0.48 microM at 3 h. Although, 25 and 50 mM NAC completely inhibited H(2)O(2)-peroxidase-luminol-dependent chemiluminescence, detectable amounts of H(2)O(2) were generated in NAC solutions. It was accompanied by moderate loss of -SH groups. Catalase and ascorbic acid prevented H(2)O(2) formation in NAC solutions. In conclusion inhaled NAC revealed biphasic effect on H(2)O(2) exhalation in healthy subjects, which depends on direct H(2)O(2) scavenging and H(2)O(2) generation related to drug oxidation. The net result of these processes may determine anti- or pro-oxidant action of inhaled NAC.
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Affiliation(s)
- Urszula Szkudlarek
- Department of Experimental and Clinical Physiology, Institute of Physiology and Biochemistry, Medical University of Lodz, Mazowiecka 6/8, 92-215 Lodz, Poland
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