1
|
Higashi T, Handa H, Mai Y, Maenaka K, Tadokoro T. Protein kinase Cβ is involved in cigarette smoke gas phase-induced ferroptosis in J774 macrophages. J Pharmacol Sci 2023; 153:22-25. [PMID: 37524450 DOI: 10.1016/j.jphs.2023.06.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2023] [Revised: 06/01/2023] [Accepted: 06/20/2023] [Indexed: 08/02/2023] Open
Abstract
Cigarette smoking is a risk factor for respiratory infection caused by immune cell dysfunction. Cigarette smoke is divided into tar and gas phases. Although the gas phase induces cell death in various cell types, the mechanism for gas phase-induced cell death remains to be clarified. In this study, we have examined the effects of cigarette smoke gas phase on J774 macrophages. Cigarette smoke gas phase and cytotoxic factors in the gas phase induced protein kinase C (PKC)-dependent ferroptosis. Pharmacological studies using isoform-specific PKC inhibitors have revealed that PKCβ is involved in cigarette smoke gas phase-induced ferroptosis in J774 macrophages.
Collapse
Affiliation(s)
- Tsunehito Higashi
- Department of Cellular Pharmacology, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, West 7, North 15, Kita-ku, Sapporo, Hokkaido 060-8638, Japan.
| | - Haruka Handa
- Department of Molecular Biology, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, West 7, North 15, Kita-ku, Sapporo, Hokkaido 060-8638, Japan
| | - Yosuke Mai
- Department of Dermatology, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, West 7, North 15, Kita-ku, Sapporo, Hokkaido 060-8638, Japan
| | - Katsumi Maenaka
- Laboratory of Biomolecule Science, Faculty of Pharmaceutical Sciences, Hokkaido University, West 6, North 12, Kita-ku, Sapporo, Hokkaido, 060-0812, Japan; Center for Research and Education on Drug Discovery, Faculty of Pharmaceutical Sciences, Hokkaido University, West 6, North 12, Kita-ku, Sapporo, Hokkaido, 060-0812, Japan; Hokkaido University Institute for Vaccine Research & Development, West 6, North 12, Kita-ku, Sapporo, Hokkaido, 060-0812, Japan; Global Station for Biosurfaces and Drug Discovery, Hokkaido University, West 6, North 12, Kita-ku, Sapporo, Hokkaido, 060-0812, Japan
| | - Takashi Tadokoro
- Center for Research and Education on Drug Discovery, Faculty of Pharmaceutical Sciences, Hokkaido University, West 6, North 12, Kita-ku, Sapporo, Hokkaido, 060-0812, Japan; Faculty of Pharmaceutical Sciences, Sanyo-Onoda City University, 1-1-1 Daigakudori, Sanyo-Onoda, Yamaguchi, 756-0884, Japan
| |
Collapse
|
2
|
Huber ME, Larson E, Lust TN, Heisler CM, Harriff MJ. Chronic Obstructive Pulmonary Disease and Cigarette Smoke Lead to Dysregulated Mucosal-associated Invariant T-Cell Activation. Am J Respir Cell Mol Biol 2023; 68:90-102. [PMID: 36174211 PMCID: PMC9817907 DOI: 10.1165/rcmb.2022-0131oc] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2022] [Accepted: 09/29/2022] [Indexed: 02/05/2023] Open
Abstract
Chronic obstructive pulmonary disease (COPD) is associated with airway inflammation, increased infiltration by CD8+ T lymphocytes, and infection-driven exacerbations. Although cigarette smoke is the leading risk factor for COPD, the mechanisms driving the development of COPD in only a subset of smokers are incompletely understood. Lung-resident mucosal-associated invariant T (MAIT) cells play a role in microbial infections and inflammatory diseases. The role of MAIT cells in COPD pathology is unknown. Here, we examined MAIT cell activation in response to cigarette smoke-exposed primary human bronchial epithelial cells (BECs) from healthy, COPD, or smoker donors. We observed significantly higher baseline MAIT cell responses to COPD BECs than healthy BECs. However, infected COPD BECs stimulated a smaller fold increase in MAIT cell response despite increased microbial infection. For all donor groups, cigarette smoke-exposed BECs elicited reduced MAIT cell responses; conversely, cigarette smoke exposure increased ligand-mediated MR1 surface translocation in healthy and COPD BECs. Our data demonstrate that MAIT cell activation is dysregulated in the context of cigarette smoke and COPD. MAIT cells could contribute to cigarette smoke- and COPD-associated inflammation through inappropriate activation and reduced early recognition of bacterial infection, contributing to microbial persistence and COPD exacerbations.
Collapse
Affiliation(s)
| | - Emily Larson
- Portland Veterans Affairs Research Foundation, Portland, Oregon; and
| | - Taylor N. Lust
- Division of Pulmonary, Allergy, and Critical Care Medicine, Oregon Health & Science University, Portland, Oregon
| | - Chelsea M. Heisler
- Division of Pulmonary, Allergy, and Critical Care Medicine, Oregon Health & Science University, Portland, Oregon
| | - Melanie J. Harriff
- Department of Molecular and Microbial Immunology and
- Division of Pulmonary, Allergy, and Critical Care Medicine, Oregon Health & Science University, Portland, Oregon
- Veterans Affairs Portland Health Care System, Portland, Oregon
| |
Collapse
|
3
|
Bhattacharya SS, Yadav B, Yadav E, Hus A, Yadav N, Kaur P, Rosen L, Jandarov R, Yadav JS. Differential modulation of lung aquaporins among other pathophysiological markers in acute (Cl2 gas) and chronic (carbon nanoparticles, cigarette smoke) respiratory toxicity mouse models. Front Physiol 2022; 13:880815. [PMID: 36246134 PMCID: PMC9554232 DOI: 10.3389/fphys.2022.880815] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Accepted: 08/29/2022] [Indexed: 11/18/2022] Open
Abstract
Inhaled toxic chemicals and particulates are known to disrupt lung homeostasis causing pulmonary toxicity and tissue injury. However, biomarkers of such exposures and their underlying mechanisms are poorly understood, especially for emerging toxicants such as engineered nanoparticles and chemical threat agents such as chlorine gas (Cl2). Aquaporins (AQPs), commonly referred to as water channels, are known to play roles in lung homeostasis and pathophysiology. However, little is known on their regulation in toxicant-induced lung injuries. Here, we compared four lung toxicity models namely, acute chemical exposure (Cl2)-, chronic particulate exposure (carbon nanotubes/CNT)-, chronic chemical exposure (cigarette smoke extract/CSE)-, and a chronic co-exposure (CNT + CSE)- model, for modulation of lung aquaporins (AQPs 1, 3, 4, and 5) in relation to other pathophysiological endpoints. These included markers of compromised state of lung mucosal lining [mucin 5b (MUC5B) and surfactant protein A (SP-A)] and lung-blood barrier [protein content in bronchoalveolar lavage (BAL) fluid and, cell tight junction proteins occludin and zona-occludens]. The results showed toxicity model-specific regulation of AQPs measured in terms of mRNA abundance. A differential upregulation was observed for AQP1 in acute Cl2 exposure model (14.71-fold; p = 0.002) and AQP3 in chronic CNT exposure model (3.83-fold; p = 0.044). In contrast, AQP4 was downregulated in chronic CSE model whereas AQP5 showed no significant change in any of the models. SP-A and MUC5B expression showed a decreasing pattern across all toxicity models except the acute Cl2 toxicity model, which showed a highly significant upregulation of MUC5B (25.95-fold; p = 0.003). This was consistent with other significant pathophysiological changes observed in this acute model, particularly a compromised lung epithelial-endothelial barrier indicated by significantly increased protein infiltration and expression of tight junction proteins, and more severe histopathological (structural and immunological) changes. To our knowledge, this is the first report on lung AQPs as molecular targets of the study toxicants. The differentially regulated AQPs, AQP1 in acute Cl2 exposure versus AQP3 in chronic CNT nanoparticle exposure, in conjunction with the corresponding differentially impacted pathophysiological endpoints (particularly MUC5B) could potentially serve as predictive markers of toxicant type-specific pulmonary injury and as candidates for future investigation for clinical intervention.
Collapse
Affiliation(s)
- Sukanta S. Bhattacharya
- Pulmonary Pathogenesis and Immunotoxicology Laboratory, Department of Environmental and Public Health Sciences, University of Cincinnati College of Medicine, Cincinnati, OH, United States
| | - Brijesh Yadav
- Pulmonary Pathogenesis and Immunotoxicology Laboratory, Department of Environmental and Public Health Sciences, University of Cincinnati College of Medicine, Cincinnati, OH, United States
| | - Ekta Yadav
- Pulmonary Pathogenesis and Immunotoxicology Laboratory, Department of Environmental and Public Health Sciences, University of Cincinnati College of Medicine, Cincinnati, OH, United States
- Department of Physiology and Biophysics, Case Western Reserve University School of Medicine, Cleveland, OH, United States
| | - Ariel Hus
- Department of Biology, University of Miami, Coral Gables, FL, United States
| | - Niket Yadav
- Pulmonary Pathogenesis and Immunotoxicology Laboratory, Department of Environmental and Public Health Sciences, University of Cincinnati College of Medicine, Cincinnati, OH, United States
- Medical Scientist Training Program, University of Virginia School of Medicine, Charlottesville, VA, United States
| | - Perminder Kaur
- Pulmonary Pathogenesis and Immunotoxicology Laboratory, Department of Environmental and Public Health Sciences, University of Cincinnati College of Medicine, Cincinnati, OH, United States
| | - Lauren Rosen
- Department of Pathology and Laboratory Medicine, University of Cincinnati, UC Health University Hospital Laboratory Medicine Building, Cincinnati, OH, United States
| | - Roman Jandarov
- Division of Biostatistics and Bioinformatics, Department of Environmental and Public Health Sciences, University of Cincinnati College of Medicine, Cincinnati, OH, United States
| | - Jagjit S. Yadav
- Pulmonary Pathogenesis and Immunotoxicology Laboratory, Department of Environmental and Public Health Sciences, University of Cincinnati College of Medicine, Cincinnati, OH, United States
- *Correspondence: Jagjit S. Yadav,
| |
Collapse
|
4
|
Guan H, Zhou P, Qi Y, Huang H, Wang J, Liu X. Cigarette smoke-induced trophoblast cell ferroptosis in rat placenta and the effects of L-arginine intervention. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2022; 243:114015. [PMID: 36030684 DOI: 10.1016/j.ecoenv.2022.114015] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2022] [Revised: 08/08/2022] [Accepted: 08/21/2022] [Indexed: 06/15/2023]
Abstract
Cigarette smoke (CS) disrupts placental development, and impairs fetal health and maternal fertility, thus resulting in low birth weight, premature delivery, and spontaneous abortion; however, the underlying mechanisms remain unclear. This study investigated the mechanism through which CS impairs placental trophoblast cell viability and function. An in vivo study in pregnant rats exposed to CS indicated that CS- exposure decreased antioxidant factors expression and blocked NRF2 activation in the placenta. Anti-ferroptosis regulators expression was downregulated, and pro-ferroptosis regulators expression was upregulated in placentas from CS-exposed rats. Further analysis revealed that cigarette smoke extract (CSE) led to peroxins downregulation and decreased the number of peroxisomes. An in vitro study in HTR-8/SVneo(HTR-8) cells showed that CSE led to free iron and ROS accumulation, and subsequently induced lipid peroxidation and cell death. Ferroptosis inhibitors and the antioxidant L-arginine (ARG) partially inhibited CSE-induced cell death. ARG partially alleviated the toxic effects of CSE by promoting antioxidant factors expression in placenta and suppressing HTR-8 cell ferroptosis. Knockdown of PEX14, a peroxisome biogenesis marker, led to the downregulation of multiple PEXs, thus increasing intracellular H2O2 levels and inducing HTR-8 cell ferroptosis. These findings demonstrated that ferroptosis is responsible for CSE-induced trophoblast cell death and suggest that peroxisome dysfunction is involved in CSE-induced ferroptosis. Therefore, CSE-induced ferroptosis may serve as a potential therapeutic target for preventing adverse pregnancy outcomes.
Collapse
Affiliation(s)
- Hongbo Guan
- Department of Obstetrics and Gynecology, Shengjing Hospital of China Medical University, Shenyang 110004, China
| | - Pei Zhou
- Department of Obstetrics and Gynecology, Shengjing Hospital of China Medical University, Shenyang 110004, China
| | - Ying Qi
- Virology Laboratory, Shengjing Hospital of China Medical University, Shenyang 110004, China
| | - Huan Huang
- Department of Obstetrics and Gynecology, Shengjing Hospital of China Medical University, Shenyang 110004, China
| | - Jun Wang
- Department of Obstetrics and Gynecology, Shengjing Hospital of China Medical University, Shenyang 110004, China
| | - Xiaomei Liu
- Department of Obstetrics and Gynecology, Shengjing Hospital of China Medical University, Shenyang 110004, China.
| |
Collapse
|
5
|
Crosstalk between gut microbiota and lung inflammation in murine toxicity models of respiratory exposure or co-exposure to carbon nanotube particles and cigarette smoke extract. Toxicol Appl Pharmacol 2022; 447:116066. [PMID: 35595072 DOI: 10.1016/j.taap.2022.116066] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2022] [Revised: 05/08/2022] [Accepted: 05/11/2022] [Indexed: 11/23/2022]
Abstract
Carbon nanotubes (CNTs) are emerging environmental and occupational toxicants known to induce lung immunotoxicity. While the underlying mechanisms are evolving, it is yet unknown whether inhaled CNTs would cause abnormalities in gut microbiota (dysbiosis), and if such microbiota alteration plays a role in the modulation of CNT-induced lung immunotoxicity. It is also unknown whether co-exposure to tobacco smoke will modulate CNT effects. We compared the effects of lung exposure to multi-wall CNT, cigarette smoke extract (CSE), and their combination (CNT + CSE) in a 4-week chronic toxicity mouse model. The exposures induced differential perturbations in gut microbiome as evidenced by altered microbial α- and β- diversity, indicating a lung-to-gut communication. The gut dysbiosis due to CNTs, unlike CSE, was characterized by an increase in Firmicutes/Bacteroidetes ratio typically associated with proinflammatory condition. Notably, while all three exposures reduced Proteobacteria, the CNT exposure and co-exposure induced appearance of Tenericutes and Cyanobacteria, respectively, implicating them as potential biomarkers of exposure. CNTs differentially induced certain lung proinflammatory mediators (TNF-α, IL-1β, CCL2, CXCL5) whereas CNTs and CSE commonly induced other mediators (CXCL1 and TGF-β). The co-exposure showed either a component-dominant effect or a summative effect for both dysbiosis and lung inflammation. Depletion of gut microbiota attenuated both the differentially-induced and commonly-induced (TGF-β) lung inflammatory mediators as well as granulomas implying gut-to-lung communication and a modulatory role of gut dysbiosis. Taken together, the results demonstrated gut dysbiosis as a systemic effect of inhaled CNTs and provided the first evidence of a bidirectional gut-lung crosstalk modulating CNT lung immunotoxicity.
Collapse
|
6
|
Zhang Z, Fu C, Liu J, Sai X, Qin C, Di T, Yang Y, Wu Y, Bian T. Hypermethylation of the Nrf2 Promoter Induces Ferroptosis by Inhibiting the Nrf2-GPX4 Axis in COPD. Int J Chron Obstruct Pulmon Dis 2021; 16:3347-3362. [PMID: 34934311 PMCID: PMC8684379 DOI: 10.2147/copd.s340113] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2021] [Accepted: 11/22/2021] [Indexed: 12/12/2022] Open
Abstract
Background Nuclear factor E2-related factor 2 (Nrf2) is involved in oxidative stress and lung inflammation and regulates the etiology of chronic obstructive pulmonary disease (COPD). Ferroptosis is characterized by the accumulation of lipid reactive oxygen species (ROS) via ferrous ion-dependent Fenton reactions and is involved in COPD. However, the role of Nrf2 in ferroptosis and its epigenetic regulation in the pathogenesis of COPD remain unclear. Methods Ferroptosis was detected by 4-HNE, MDA, C11BODIPY, DCFH-DA, Peals’ staining and CCK-8 assays. qPCR and Western blotting were performed to examine the Nrf2 levels in peripheral lung tissues, primary epithelial cells collected from patients with COPD and subjects with normal pulmonary function (never-smoker [control-NS]; smoker [control-S]), and cigarette smoke extract (CSE)-treated human bronchial epithelial (HBE) cells. ELISA was used to quantify IL-8 and IL-1β levels. Methylation of the Nrf2 promoter was analyzed by bisulfite sequencing and pyrosequencing. Results Ferroptosis was involved in COPD and glutathione peroxidase 4 (GPX4) expression was downregulated in the COPD group. Reactive oxygen species (ROS), lipid peroxides and MDA were increased, but GPX4 and SOD were exhausted in CSE-treated HBE cells. The production of IL-1β and IL-8 was promoted in HBE cells in response to CSE but could be reversed by the ferroptosis inhibitor fer-1. The Nrf2 level was significantly decreased in the COPD group compared with the control-S and control-NS groups. Increased Nrf2 expression enhanced GPX4 and SOD levels and inhibited ferroptosis and proinflammatory cytokines in the supernatant. Inhibition of GPX4 reversed the effect of Nrf2 overexpression and promoted ferroptosis. Two specific CpG sites within the Nrf2 promoter were hypermethylated in the COPD group. Similarly, CSE-treated HBE cells exhibited hypermethylation of the Nrf2 gene. Conclusion Nrf2 expression was downregulated in the lungs of COPD patients due to hypermethylation of the Nrf2 promoter, inhibiting Nrf2/GPX4 and ferroptosis, which is related to the initiation and progression of COPD. Targeting Nrf2/GPX4 may inhibit ferroptosis, which could provide strategies to delay or treat COPD.
Collapse
Affiliation(s)
- Zixiao Zhang
- Department of Respiratory Medicine, Wuxi People's Hospital Affiliated to Nanjing, Medical University, Wuxi, Jiangsu, 214023, People's Republic of China
| | - Congli Fu
- Department of Respiratory Medicine, Wuxi People's Hospital Affiliated to Nanjing, Medical University, Wuxi, Jiangsu, 214023, People's Republic of China.,Department of Pulmonary and Critical Care Medicine, Zhejiang Provincial People's Hospital, People's Hospital of Hangzhou Medical College, Hangzhou, Zhejiang, 310014, People's Republic of China
| | - Jiaxin Liu
- Department of Respiratory Medicine, Wuxi People's Hospital Affiliated to Nanjing, Medical University, Wuxi, Jiangsu, 214023, People's Republic of China
| | - Xiaoyan Sai
- Department of Respiratory Medicine, Wuxi People's Hospital Affiliated to Nanjing, Medical University, Wuxi, Jiangsu, 214023, People's Republic of China
| | - Chu Qin
- Department of Respiratory Medicine, Wuxi People's Hospital Affiliated to Nanjing, Medical University, Wuxi, Jiangsu, 214023, People's Republic of China
| | - Tingting Di
- Department of Respiratory Medicine, Wuxi People's Hospital Affiliated to Nanjing, Medical University, Wuxi, Jiangsu, 214023, People's Republic of China
| | - Yue Yang
- Department of Respiratory Medicine, Wuxi People's Hospital Affiliated to Nanjing, Medical University, Wuxi, Jiangsu, 214023, People's Republic of China
| | - Yan Wu
- Department of Respiratory Medicine, Wuxi People's Hospital Affiliated to Nanjing, Medical University, Wuxi, Jiangsu, 214023, People's Republic of China
| | - Tao Bian
- Department of Respiratory Medicine, Wuxi People's Hospital Affiliated to Nanjing, Medical University, Wuxi, Jiangsu, 214023, People's Republic of China
| |
Collapse
|
7
|
Lian N, Zhang Q, Chen J, Chen M, Huang J, Lin Q. The Role of Ferroptosis in Bronchoalveolar Epithelial Cell Injury Induced by Cigarette Smoke Extract. Front Physiol 2021; 12:751206. [PMID: 34658933 PMCID: PMC8511776 DOI: 10.3389/fphys.2021.751206] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2021] [Accepted: 09/08/2021] [Indexed: 01/31/2023] Open
Abstract
Background: Cigarette smoking is a major risk factor for bronchoalveolar epithelial cell (BAEC) injury. Understanding the relevant pathogenesis is important for the treatment of cigarette smoke–related chronic airway diseases such as chronic obstructive pulmonary disease. Methods: In this study, BAECs were cultured in 5% cigarette smoke extract (CSE) or regular culture medium for 24 h. Differentially expressed genes (DEGs) were detected by next-generation RNA sequencing (RNA-seq) and validated by quantitative reverse transcription polymerase chain reaction (qRT-PCR). Bioinformatic analysis was performed on DEGs. Co-treated BAECs with 5% CSE and the ferroptosis inhibitor, ferrostatin-1 was applied to observe the role of ferroptosis. Results: In the CSE group, 210 upregulated genes and 159 downregulated genes were identified compared with the control group. Gene Ontology and Kyoto Encyclopedia of Genes and Genomes (KEGG) analyses showed that the DEGs were related to oxidative stress and ferroptosis. Ferroptosis-related genes were further verified by qRT-PCR. The mRNA level of GPX4 decreased; the mRNA levels of ACSL4, FTH1 and SLC7A11 increased (p < 0.05). Pretreatment with the ferroptosis inhibitor ferrostatin-1 mitigated CSE-induced ROS accumulation and inflammatory mediator expression in BAECs (p < 0.05). Conclusion: CSE treatment altered ferroptosis-related gene expression patterns in cultured BAECs. Inhibition of ferroptosis reduced the inflammatory response of CSE-treated BAECs. These data provide a better understanding of the underlying molecular mechanisms of CSE-related lung injury.
Collapse
Affiliation(s)
- Ningfang Lian
- Department of Pulmonary and Critical Care Medicine, The First Affiliated Hospital of Fujian Medical University, Institute of Respiratory Disease, Fujian Medical University, Fuzhou, China
| | - Qiaoxian Zhang
- Department of Pulmonary and Critical Care Medicine, The First Affiliated Hospital of Fujian Medical University, Institute of Respiratory Disease, Fujian Medical University, Fuzhou, China
| | - Jia Chen
- Department of Pulmonary and Critical Care Medicine, The First Affiliated Hospital of Fujian Medical University, Institute of Respiratory Disease, Fujian Medical University, Fuzhou, China
| | - Mengxue Chen
- Department of Pulmonary and Critical Care Medicine, The First Affiliated Hospital of Fujian Medical University, Institute of Respiratory Disease, Fujian Medical University, Fuzhou, China
| | - Jiefeng Huang
- Department of Pulmonary and Critical Care Medicine, The First Affiliated Hospital of Fujian Medical University, Institute of Respiratory Disease, Fujian Medical University, Fuzhou, China
| | - Qichang Lin
- Department of Pulmonary and Critical Care Medicine, The First Affiliated Hospital of Fujian Medical University, Institute of Respiratory Disease, Fujian Medical University, Fuzhou, China
| |
Collapse
|
8
|
Nicotine Exacerbates TAAD Formation Induced by Smooth Muscle-Specific Deletion of the TGF- β Receptor 2. J Immunol Res 2021; 2021:6880036. [PMID: 34646889 PMCID: PMC8505064 DOI: 10.1155/2021/6880036] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2021] [Accepted: 09/04/2021] [Indexed: 01/22/2023] Open
Abstract
Tobacco smoke is an established risk factor for thoracic aortic aneurysms and dissections (TAAD). However, little is known about its underlying mechanisms due to the lack of validated animal models. The present study developed a mouse model that may be utilized to investigate exacerbation of TAAD formation by mimetics of tobacco smoke. TAADs were created via inducible deletion of smooth muscle cell-specific Tgfbr2 receptors. Using this model, the first set of experiments evaluated the efficacy of nicotine salt (34.0 mg/kg/day), nicotine free base (NFB, 5.0 mg 90-day pellets), and cigarette smoke extract (0.1 ml/mouse/day). Compared with their respective control groups, only NFB pellets promoted TAAD dilation (23 ± 3% vs. 12 ± 2%, P = 0.014), and this efficacy was achieved at a cost of >50% acute mortality. Infusion of NFB with osmotic minipumps at extremely high, but nonlethal, doses (15.0 or 45.0 mg/kg/day) failed to accelerate TAAD dilation. Interestingly, costimulation with β-aminopropionitrile (BAPN) promoted TAAD dilation and aortic rupture at dosages of 3.0 and 45.0 mg/kg/day, respectively, indicating that BAPN sensitizes the response of TAADs to NFB. In subsequent analyses, the detrimental effects of NFB were associated with clustering of macrophages, neutrophils, and T-cells in areas with structural destruction, enhanced matrix metalloproteinase- (MMP-) 2 production, and pathological angiogenesis with attenuated fibrosis in the adventitia. In conclusion, modeling nicotine exacerbation of TAAD formation requires optimization of chemical form, route of delivery, and dosage of the drug as well as the pathologic complexity of TAADs. Under the optimized conditions of the present study, chronic inflammation and adventitial mal-remodeling serve as critical pathways through which NFB exacerbates TAAD formation.
Collapse
|
9
|
Duffy E, Huttunen K, Lahnavik R, Smeaton AF, Morrin A. Visualising household air pollution: Colorimetric sensor arrays for monitoring volatile organic compounds indoors. PLoS One 2021; 16:e0258281. [PMID: 34614030 PMCID: PMC8494322 DOI: 10.1371/journal.pone.0258281] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Accepted: 09/22/2021] [Indexed: 11/18/2022] Open
Abstract
Indoor air quality monitoring as it relates to the domestic setting is an integral part of human exposure monitoring and health risk assessment. Hence there is a great need for easy to use, fast and economical indoor air quality sensors to monitor the volatile organic compound composition of the air which is known to be significantly perturbed by the various source emissions from activities in the home. To meet this need, paper-based colorimetric sensor arrays were deployed as volatile organic compound detectors in a field study aiming to understand which activities elicit responses from these sensor arrays in household settings. The sensor array itself is composed of pH indicators and aniline dyes that enable molecular recognition of carboxylic acids, amines and carbonyl-containing compounds. The sensor arrays were initially deployed in different rooms in a single household having different occupant activity types and levels. Sensor responses were shown to differ for different room settings on the basis of occupancy levels and the nature of the room emission sources. Sensor responses relating to specific activities such as cooking, cleaning, office work, etc were noted in the temporal response. Subsequently, the colorimetric sensor arrays were deployed in a broader study across 9 different households and, using multivariate analysis, the sensor responses were shown to correlate strongly with household occupant activity and year of house build. Overall, this study demonstrates the significant potential for this type of simple approach to indoor air pollution monitoring in residential environments.
Collapse
Affiliation(s)
- Emer Duffy
- Insight SFI Research Centre for Data Analytics, Dublin City University, Dublin, Ireland
- National Centre for Sensor Research, School of Chemical Sciences, Dublin City University, Dublin, Ireland
| | - Kati Huttunen
- Department of Environmental and Biological Sciences, University of Eastern Finland, Kuopio, Finland
| | - Roosa Lahnavik
- Department of Environmental and Biological Sciences, University of Eastern Finland, Kuopio, Finland
| | - Alan F. Smeaton
- Insight SFI Research Centre for Data Analytics, Dublin City University, Dublin, Ireland
| | - Aoife Morrin
- Insight SFI Research Centre for Data Analytics, Dublin City University, Dublin, Ireland
- National Centre for Sensor Research, School of Chemical Sciences, Dublin City University, Dublin, Ireland
- * E-mail:
| |
Collapse
|
10
|
Sepand MR, Maghsoudi AS, Shadboorestan A, Mirnia K, Aghsami M, Raoufi M. Cigarette smoke-induced toxicity consequences of intracellular iron dysregulation and ferroptosis. Life Sci 2021; 281:119799. [PMID: 34229007 DOI: 10.1016/j.lfs.2021.119799] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2021] [Revised: 06/27/2021] [Accepted: 06/30/2021] [Indexed: 01/18/2023]
Abstract
Despite numerous studies on the mechanisms of cigarette smoking toxicity over the past three decades, some aspects remain obscure. Recent developments have drawn attention to some hopeful indicators that allow us to advance our awareness of cigarette-induced cell death. Ferroptosis is considered a type of governed death of cells distinguished by the iron-dependent lipid hydroperoxide deposition to fatal concentrations. Ferroptosis has been linked with pathological settings such as neurodegenerative diseases, cancer, heart attack, hemorrhagic stroke, traumatic brain injury, ischemia-reperfusion injury, and renal dysfunction. This review tries to explain the causal role of ferroptosis cascade in cigarette smoke-mediated toxicity and cell death, highlighting associations on potential action mechanisms and proposing suggestions for its detoxifying and therapeutic interventions.
Collapse
Affiliation(s)
- Mohammad Reza Sepand
- Nanotechnology Research Center, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran 13169-43551, Iran
| | - Armin Salek Maghsoudi
- Toxicology and Diseases Group (TDG), Pharmaceutical Sciences Research Center (PSRC), The Institute of Pharmaceutical Sciences (TIPS), Tehran University of Medical Sciences, Tehran, Iran
| | - Amir Shadboorestan
- Department of Toxicology, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
| | - Kayvan Mirnia
- Department of Neonatology, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Mehdi Aghsami
- Department of Pharmacology and Toxicology, School of Pharmacy, Iran University of Medical Sciences, Tehran, Iran
| | - Mohammad Raoufi
- Nanotechnology Research Center, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran 13169-43551, Iran; Physical Chemistry I and Research Center of Micro and Nanochemistry (Cμ), University of Siegen, Siegen, Germany.
| |
Collapse
|
11
|
Suzuki Y, Tanaka H, Horinouchi T, Sano H, Honkura N, Unno N, Miwa S, Urano T. Fibrinolysis-resistant carbonylated fibrin detected in thrombi attached to the vascular wall of abdominal aortic aneurysms. Sci Rep 2020; 10:20728. [PMID: 33244022 PMCID: PMC7691368 DOI: 10.1038/s41598-020-77582-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2020] [Accepted: 11/03/2020] [Indexed: 12/22/2022] Open
Abstract
In this study, we investigated how carbonylation of fibrinogen by acrolein modified its indispensable function to enhance fibrinolysis after being converted to fibrin and contributed to generating a fibrinolysis-resistant fibrin clot. Acrolein-treated fibrinogen was subjected to tissue plasminogen activator-induced fibrinolysis assay and the effect of lysine residue carbonylation in fibrinogen on fibrinolysis was analyzed. The acrolein-treated fibrinogen-derived fibrin clot appeared more resistant to fibrinolysis and the N-acetyl 3-formyl-3,4-dehydropiperidino (FDP)-Lysine levels in the lysed solution were positively correlated with the duration of clot lysis. The lysine analog 6-amino hexanoic acid (6AHA), which mimics the C-terminal lysine of fibrin, was carbonylated and its enhancing effect on Glu1-plasminogen activation was evaluated. After incubation with acrolein, 6AHA was converted to N-acetyl FDP-6AHA, losing its ability to enhance Glu1-plasminogen activation. These results suggest that fibrinogen carbonylation by acrolein to generate N-acetyl FDP-Lysine resulted in the generation of fibrinolysis-resistant fibrin by attenuating the C-terminal lysine-dependent activation of the Glu1-plasminogen. In abdominal aortic aneurysms, fibrin(ogen) containing the acrolein adduct N-acetyl FDP-Lysine was detected in the vascular wall-attached thrombi. These results suggest that this mechanism is likely involved in the modification of fibrinolysis-resistant thrombi and to their persistence for a long period.
Collapse
Affiliation(s)
- Yuko Suzuki
- Department of Medical Physiology, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Hiroki Tanaka
- Department of Medical Physiology, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Takahiro Horinouchi
- Department of Cellular Pharmacology, Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Hideto Sano
- Department of Medical Physiology, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Naoki Honkura
- Department of Medical Physiology, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Naoki Unno
- The Second Department of Surgery, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Soichi Miwa
- Toyooka Hospital, Toyooka Public Hospitals' Association, Toyooka, Japan
| | - Tetsumei Urano
- Department of Medical Physiology, Hamamatsu University School of Medicine, Hamamatsu, Japan.
| |
Collapse
|
12
|
Sampilvanjil A, Karasawa T, Yamada N, Komada T, Higashi T, Baatarjav C, Watanabe S, Kamata R, Ohno N, Takahashi M. Cigarette smoke extract induces ferroptosis in vascular smooth muscle cells. Am J Physiol Heart Circ Physiol 2020; 318:H508-H518. [PMID: 31975626 DOI: 10.1152/ajpheart.00559.2019] [Citation(s) in RCA: 105] [Impact Index Per Article: 26.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Cigarette smoking is a major risk factor for aortic aneurysm and dissection; however, no causative link between smoking and these aortic disorders has been proven. In the present study, we investigated the mechanism by which cigarette smoke affects vascular wall cells and found that cigarette smoke extract (CSE) induced a novel form of regulated cell death termed ferroptosis in vascular smooth muscle cells (VSMCs). CSE markedly induced cell death in A7r5 cells and primary rat VSMCs, but not in endothelial cells, which was completely inhibited by specific ferroptosis inhibitors [ferrostatin-1 (Fer-1) and Liproxstatin-1] and an iron chelator (deferoxamine). CSE-induced VSMC death was partially inhibited by a GSH precursor (N-acetyl cysteine) and an NADPH oxidase inhibitor [diphenyleneiodonium chloride (DPI)], but not by inhibitors of pan-caspases (Z-VAD), caspase-1 (Z-YVAD), or necroptosis (necrostatin-1). CSE also upregulated IL-1β, IL-6, TNF-α, matrix metalloproteinase (MMP)-2, MMP-9, and TIMP-1 (tissue inhibitor of metalloproteinase)in A7r5 cells, which was inhibited by Fer-1. Furthermore, CSE induced the upregulation of Ptgs2 mRNA, lipid peroxidation, and intracellular GSH depletion, which are key features of ferroptosis. VSMC ferroptosis was induced by acrolein and methyl vinyl ketone, major constituents of CSE. Furthermore, CSE caused medial VSMC loss in ex vivo aortas. Electron microscopy analysis showed mitochondrial damage and fragmentation in medial VSMCs of CSE-treated aortas. All of these manifestations were partially restored by Fer-1. These findings demonstrate that ferroptosis is responsible for CSE-induced VSMC death and suggest that ferroptosis is a potential therapeutic target for preventing aortic aneurysm and dissection.NEW & NOTEWORTHY Cigarette smoke extract (CSE)-induced cell death in rat vascular smooth muscle cells (VSMCs) was completely inhibited by specific ferroptosis inhibitors and an iron chelator. CSE also induced the upregulation of Ptgs2 mRNA, lipid peroxidation, and intracellular GSH depletion, which are key features of ferroptosis. CSE caused medial VSMC loss in ex vivo aortas. These findings demonstrate that ferroptosis is responsible for CSE-induced VSMC death.
Collapse
Affiliation(s)
- Ariunaa Sampilvanjil
- Division of Inflammation Research, Center for Molecular Medicine, Jichi Medical University, Tochigi, Japan
| | - Tadayoshi Karasawa
- Division of Inflammation Research, Center for Molecular Medicine, Jichi Medical University, Tochigi, Japan
| | - Naoya Yamada
- Division of Inflammation Research, Center for Molecular Medicine, Jichi Medical University, Tochigi, Japan
| | - Takanori Komada
- Division of Inflammation Research, Center for Molecular Medicine, Jichi Medical University, Tochigi, Japan
| | - Tsunehito Higashi
- Department of Cellular Pharmacology, Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Chintogtokh Baatarjav
- Division of Inflammation Research, Center for Molecular Medicine, Jichi Medical University, Tochigi, Japan
| | - Sachiko Watanabe
- Division of Inflammation Research, Center for Molecular Medicine, Jichi Medical University, Tochigi, Japan
| | - Ryo Kamata
- Division of Inflammation Research, Center for Molecular Medicine, Jichi Medical University, Tochigi, Japan
| | - Nobuhiko Ohno
- Division of Histology and Cell Biology, Department of Anatomy, Jichi Medical University, Tochigi, Japan.,Division of Ultrastructural Research, National Institute for Physiological Sciences, Aichi, Japan
| | - Masafumi Takahashi
- Division of Inflammation Research, Center for Molecular Medicine, Jichi Medical University, Tochigi, Japan
| |
Collapse
|
13
|
Hatai M, Horiyama S, Yoshikawa N, Kinoshita E, Kagota S, Shinozuka K, Nakamura K. trans-2-Pentenal, an Active Compound in Cigarette Smoke, Identified via Its Ability to Form Adducts with Glutathione. Chem Pharm Bull (Tokyo) 2019; 67:1000-1005. [DOI: 10.1248/cpb.c19-00345] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Mayuko Hatai
- Department of Pharmacology, School of Pharmacy and Pharmaceutical Sciences, Mukogawa Women’s University
| | | | - Noriko Yoshikawa
- Department of Pharmacology, School of Pharmacy and Pharmaceutical Sciences, Mukogawa Women’s University
- Mukogawa Women’s University, Institute for Bioscience
| | - Eriko Kinoshita
- Department of Pharmacology, School of Pharmacy and Pharmaceutical Sciences, Mukogawa Women’s University
| | - Satomi Kagota
- Department of Pharmacology, School of Pharmacy and Pharmaceutical Sciences, Mukogawa Women’s University
| | - Kazumasa Shinozuka
- Department of Pharmacology, School of Pharmacy and Pharmaceutical Sciences, Mukogawa Women’s University
| | - Kazuki Nakamura
- Department of Pharmacology, School of Pharmacy and Pharmaceutical Sciences, Mukogawa Women’s University
| |
Collapse
|
14
|
Meehan-Atrash J, Duell AK, McWhirter KJ, Luo W, Peyton DH, Strongin RM. Free-Base Nicotine Is Nearly Absent in Aerosol from IQOS Heat-Not-Burn Devices, As Determined by 1H NMR Spectroscopy. Chem Res Toxicol 2019; 32:974-976. [PMID: 31088073 PMCID: PMC9888077 DOI: 10.1021/acs.chemrestox.9b00076] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Heat-not-burn products, eg, I quit ordinary smoking (IQOS), are becoming popular alternative tobacco products. The nicotine aerosol protonation state has addiction implications due to differences in absorption kinetics and harshness. Nicotine free-base fraction (αfb) ranges from 0 to 1. Herein, we report αfb for IQOS aerosols by exchange-averaged 1H NMR chemical shifts of the nicotine methyl protons in bulk aerosol and verified by headspace-solid phase microextraction-gas chromatography-mass spectrometry. The αfb ≈ 0 for products tested; likely a result of proton transfer from acetic acid and/or other additives in the largely aqueous aerosol. Others reported higher αfb for these products, however, their methods were subject to error due to solvent perturbation.
Collapse
Affiliation(s)
- Jiries Meehan-Atrash
- Department of Chemistry, Portland State University, Portland, Oregon 97207-0751, United States
| | - Anna K Duell
- Department of Chemistry, Portland State University, Portland, Oregon 97207-0751, United States
| | - Kevin J. McWhirter
- Department of Civil and Environmental Engineering, Portland State University, Portland, Oregon 97207-0751, United States
| | - Wentai Luo
- Department of Chemistry, Portland State University, Portland, Oregon 97207-0751, United States,Department of Civil and Environmental Engineering, Portland State University, Portland, Oregon 97207-0751, United States
| | - David H. Peyton
- Department of Chemistry, Portland State University, Portland, Oregon 97207-0751, United States
| | - Robert M. Strongin
- Department of Chemistry, Portland State University, Portland, Oregon 97207-0751, United States,Corresponding Author:
| |
Collapse
|
15
|
Higashi T, Elmeligy E, Mai Y, Noya Y, Terada K, Mazaki Y, Kuge Y, Miwa S. Glutathione and cysteines suppress cytotoxicity of gas phase of cigarette smoke by direct reacting with unsaturated carbonyl compounds in the gas phase. Biochem Biophys Res Commun 2019; 509:988-993. [PMID: 30654934 DOI: 10.1016/j.bbrc.2019.01.040] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2018] [Accepted: 01/08/2019] [Indexed: 01/12/2023]
Abstract
Unsaturated carbonyl compounds, such as acrolein (ACR) and methyl vinyl ketone (MVK), are environmental pollutants, and are contained in smoke, automobile exhaust, and heated oil. We have previously reported that major cytotoxic factors in the gas phase of cigarette smoke are ACR and MVK. ACR and MVK induce cell damage by reactive oxygen species generation via protein kinase C and NADPH oxidases, and antioxidants, such as glutathione (GSH) and N-acetylcysteine (NAC), can effectively suppress their cytotoxic activities. In this study, we attempted to elucidate the molecular mechanism(s) for suppression of ACR- and MVK-induced cytotoxic activities by these antioxidants. GSH, NAC, L- and D-cysteines completely suppressed cell damage induced by gas phase extract of cigarette smoke. The results of HPLC and mass spectrometry showed that GSH and NAC directly reacted with ACR and MVK. Cysteines and cysteine derivatives suppressed ACR-induced GAPDH carbonylation, a representative protein for carbonylation. The current results suggest that GSH, NAC, and cysteines directly reacted with ACR and MVK, and suppressed these unsaturated carbonyl compounds-induced cell damage by inhibition of protein carbonylation.
Collapse
Affiliation(s)
- Tsunehito Higashi
- Department of Cellular Pharmacology, Graduate School of Medicine, Hokkaido University, Japan.
| | - Enas Elmeligy
- Faculty of Veterinary Medicine, Assiut University, Egypt
| | - Yosuke Mai
- Department of Cellular Pharmacology, Graduate School of Medicine, Hokkaido University, Japan
| | - Yoichi Noya
- Central Institute of Isotope Science, Hokkaido University, Japan
| | - Koji Terada
- Department of Cellular Pharmacology, Graduate School of Medicine, Hokkaido University, Japan
| | - Yuichi Mazaki
- Department of Cellular Pharmacology, Graduate School of Medicine, Hokkaido University, Japan
| | - Yuji Kuge
- Central Institute of Isotope Science, Hokkaido University, Japan
| | - Soichi Miwa
- Department of Cellular Pharmacology, Graduate School of Medicine, Hokkaido University, Japan
| |
Collapse
|
16
|
Higashi T, Mai Y, Mazaki Y. Protein kinase C-dependent cell damage by unsaturated carbonyl compounds in vascular cells. J Biosci Bioeng 2018; 126:527-532. [DOI: 10.1016/j.jbiosc.2018.04.020] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2018] [Revised: 03/26/2018] [Accepted: 04/27/2018] [Indexed: 11/26/2022]
|
17
|
Horiyama S, Hatai M, Ichikawa A, Yoshikawa N, Nakamura K, Kunitomo M. Detoxification Mechanism of α,β-Unsaturated Carbonyl Compounds in Cigarette Smoke Observed in Sheep Erythrocytes. Chem Pharm Bull (Tokyo) 2018; 66:721-726. [PMID: 29962455 DOI: 10.1248/cpb.c18-00061] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Highly reactive α,β-unsaturated carbonyl compounds, such as acrolein (ACR), crotonaldehyde (CA) and methyl vinyl ketone (MVK), are environmental pollutants present in high concentrations in cigarette smoke. We have previously found that these carbonyl compounds in cigarette smoke extract (CSE) react with intracellular glutathione (GSH) to produce the corresponding GSH-ACR, GSH-CA and GSH-MVK adducts via Michael addition reaction. These adducts are then further reduced to the corresponding alcohol forms by intracellular aldo-keto reductases in highly metastatic mouse melanoma (B16-BL6) cells and then excreted into the extracellular fluid. This time, we conducted a similar study using sheep erythrocytes and found analogous changes in the sheep erythrocytes after exposure to CSE as those with B16-BL6 cells. This indicates similarity of the detoxification pathways of the α,β-unsaturated carbonyl compounds in sheep blood cells and B16-BL6 cells. Also, we found that the GSH-MVK adduct was reduced by aldose reductase in a cell-free solution to generate its alcohol form, and its reduction reaction was completely suppressed by pretreatment with epalrestat, an aldose reductase inhibitor, a member of the aldo-keto reductase family. In the presence of sheep blood cells, however, reduction of the GSH-MVK adduct was partially inhibited by epalrestat. This revealed that some member of the aldo-keto reductase superfamily other than aldose reductase is involved in reduction of the GSH-MVK adduct in sheep blood. These results suggest that blood cells, mainly erythrocytes are involved in reducing the inhalation toxicity of cigarette smoke via an aldo-keto reductase pathway other than that of aldose reductase.
Collapse
Affiliation(s)
- Shizuyo Horiyama
- Mukogawa Women's University, Institute for Bioscience.,School of Pharmacy and Pharmaceutical Sciences, Mukogawa Women's University
| | - Mayuko Hatai
- School of Pharmacy and Pharmaceutical Sciences, Mukogawa Women's University
| | - Atsushi Ichikawa
- Mukogawa Women's University, Institute for Bioscience.,School of Pharmacy and Pharmaceutical Sciences, Mukogawa Women's University
| | - Noriko Yoshikawa
- Mukogawa Women's University, Institute for Bioscience.,School of Pharmacy and Pharmaceutical Sciences, Mukogawa Women's University
| | - Kazuki Nakamura
- School of Pharmacy and Pharmaceutical Sciences, Mukogawa Women's University
| | - Masaru Kunitomo
- School of Pharmacy and Pharmaceutical Sciences, Mukogawa Women's University
| |
Collapse
|
18
|
Buratto R, Correia D, Parel M, Crenna M, Bilger M, Debrick A. Determination of eight carbonyl compounds in aerosols trapped in phosphate buffer saline solutions to support in vitro assessment studies. Talanta 2018; 184:42-49. [PMID: 29674064 DOI: 10.1016/j.talanta.2018.02.048] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2017] [Revised: 02/11/2018] [Accepted: 02/12/2018] [Indexed: 11/17/2022]
Abstract
When investigating the toxicological impact of aerosols using in vitro systems like cell cultures, it is essential to have a quantitative measurement of the chemicals that the cells are exposed to. Carbonyl compounds represent an important class of marker compounds for in vitro and in vivo exposure to different toxicological agents, including cigarette smoke (CS). A new LC-MS/MS method that quantifies eight of these analytes in aerosols trapped in phosphate-buffered saline solutions has been developed to measure exposure. During the method development phase, particular attention has been paid to the efficient derivatization of the target compounds in the trapped aerosols and to avoid the formation of poly-derivatized molecules, which could lead to inaccurate quantifications. The method has been successively validated using the accuracy profile procedure. Selectivity, detection limits, precision, and accuracy have been evaluated for Vitrocell®, Gas Vapor Phase (GVP), and Whole Smoke (WS) matrices of smoke generated by 3R4F cigarettes and aerosol generated by the Tobacco Heating System (THS) 2.2, a heat-not-burn tobacco product developed by Philip Morris International (Smith et al., 2016) [1]. Validation results confirmed that the established working ranges also allow the analysis of THS aerosols, where the concentrations of carbonyl compounds are substantially lower than those generated by 3R4F cigarettes. Moreover, data gathered on 3R4F aerosol samples trapped with DNPH in acetonitrile solutions have been compared to the quantification given by an in-house UHPLC-MS/MS and reference values from the literature.
Collapse
Affiliation(s)
- Roberto Buratto
- PMI R&D (Part of Philip Morris International Group of Companies), Philip Morris Products S.A., Quai Jeanrenaud 5, CH-2000 Neuchâtel, Switzerland
| | - Daniela Correia
- PMI R&D (Part of Philip Morris International Group of Companies), Philip Morris Products S.A., Quai Jeanrenaud 5, CH-2000 Neuchâtel, Switzerland.
| | - Monique Parel
- PMI R&D (Part of Philip Morris International Group of Companies), Philip Morris Products S.A., Quai Jeanrenaud 5, CH-2000 Neuchâtel, Switzerland
| | - Maude Crenna
- PMI R&D (Part of Philip Morris International Group of Companies), Philip Morris Products S.A., Quai Jeanrenaud 5, CH-2000 Neuchâtel, Switzerland
| | - Mickaël Bilger
- PMI R&D (Part of Philip Morris International Group of Companies), Philip Morris Products S.A., Quai Jeanrenaud 5, CH-2000 Neuchâtel, Switzerland
| | - Audrey Debrick
- PMI R&D (Part of Philip Morris International Group of Companies), Philip Morris Products S.A., Quai Jeanrenaud 5, CH-2000 Neuchâtel, Switzerland
| |
Collapse
|
19
|
Hatai M, Yoshikawa N, Kinoshita E, Horiyama S, Kagota S, Shinozuka K, Nakamura K. Invasion-inhibiting Effects of Gaseous Components in Cigarette Smoke on Mouse Rectal Carcinoma Colon-26 Cells. ACTA ACUST UNITED AC 2018; 32:493-497. [PMID: 29695551 DOI: 10.21873/invivo.11266] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2018] [Revised: 02/12/2018] [Accepted: 02/13/2018] [Indexed: 11/10/2022]
Abstract
We investigated the anti-metastatic action of nicotine- and tar-removed cigarette smoke extract (CSE) on highly metastatic mouse Colon-26 cells using syngeneic BALB/c mice. Colon-26 cells were injected into the spleen of mice, cells were grown in the spleen as the primary lesion, and some metastasized from the spleen to liver and established a metastatic lesion. CSE (10, 30, and 100%) was intraperitoneally administered daily to the mice for 14 days after tumor inoculation. As a result, the relative spleen weights of CSE-administered mice did not differ significantly from those of the control mice. However, the relative liver weights of CSE 30%-administered mice significantly decreased compared to control mice. In order to identify the active component in CSE, we examined the action of methyl vinyl ketone (MVK) on the invasiveness of Colon-26 cells. MVK significantly reduced the invasiveness of cells. MVK may be a candidate active component of CSE.
Collapse
Affiliation(s)
- Mayuko Hatai
- Department of Pharmacology, School of Pharmacy and Pharmaceutical Sciences, Mukogawa Women's University, Nishinomiya, Japan
| | - Noriko Yoshikawa
- Department of Pharmacology, School of Pharmacy and Pharmaceutical Sciences, Mukogawa Women's University, Nishinomiya, Japan
| | - Eriko Kinoshita
- Department of Pharmacology, School of Pharmacy and Pharmaceutical Sciences, Mukogawa Women's University, Nishinomiya, Japan
| | - Shizuyo Horiyama
- Department of Pharmacology, School of Pharmacy and Pharmaceutical Sciences, Mukogawa Women's University, Nishinomiya, Japan
| | - Satomi Kagota
- Department of Pharmacology, School of Pharmacy and Pharmaceutical Sciences, Mukogawa Women's University, Nishinomiya, Japan
| | - Kazumasa Shinozuka
- Department of Pharmacology, School of Pharmacy and Pharmaceutical Sciences, Mukogawa Women's University, Nishinomiya, Japan
| | - Kazuki Nakamura
- Department of Pharmacology, School of Pharmacy and Pharmaceutical Sciences, Mukogawa Women's University, Nishinomiya, Japan
| |
Collapse
|
20
|
Wang SK, Green LA, Gutwein AR, Gupta AK, Babbey CM, Motaganahalli RL, Fajardo A, Murphy MP. Osteopontin may be a driver of abdominal aortic aneurysm formation. J Vasc Surg 2018; 68:22S-29S. [PMID: 29402664 DOI: 10.1016/j.jvs.2017.10.068] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2017] [Accepted: 10/04/2017] [Indexed: 10/18/2022]
Abstract
OBJECTIVE Previous in vitro and animal studies have suggested that osteopontin (OPN), an inflammatory extracellular matrix protein, is involved in the formation and growth of abdominal aortic aneurysms (AAAs). However, the mechanism by which this occurs continues to be nebulous. The relationship between OPN and inflammation-suppressing lymphocytes present in the human AAA condition was investigated and presented herein. METHODS Serum OPN concentrations were measured in healthy, risk factor-matched non-AAA and AAA patients by enzyme-linked immunosorbent assay (ELISA). Immunohistochemistry was used to determine the source of OPN secretion using aortic tissue collected from multiorgan donors and AAA patients undergoing open surgical repair. Vascular smooth muscle cells (VSMCs) were exposed to various inflammatory mediators, and OPN expression was evaluated by quantitative reverse transcriptase-polymerase chain reaction and ELISA. The inflammatory nature of OPN and the aortic wall was determined using a TR1 suppressor cell induction assay as a surrogate and characterized by ELISA and fluorescence-activated cell sorting. RESULTS OPN was found to be elevated in both the plasma and aortic homogenate of AAA patients compared with controls. On immunohistochemistry, OPN localized to the tunica media of the diseased aorta but was minimally expressed in healthy aorta. In vitro, cigarette smoke extract was the most potent stimulator of OPN secretion by VSMCs and increased both messenger RNA and supernatant concentrations. OPN demonstrated an ability to inhibit the induction of interleukin 10-secreting TR1 lymphocytes, a depleted population in the AAA patient, from naive precursors. Last, neutralizing receptor targets of OPN in the setting of AAA homogenate coincubation abrogated the inhibition of TR1 induction. CONCLUSIONS OPN, secreted by the VSMCs of the tunica media, is elevated in the circulating plasma and aortic wall of patients with AAA. It can inhibit the induction of the TR1 suppressor cell, leading to an overall proinflammatory state contributing to progressive aortic wall breakdown and dilation.
Collapse
Affiliation(s)
- S Keisin Wang
- Division of Vascular Surgery, Department of Surgery, Indiana University School of Medicine, Richard Roudebush VA Medical Center, Indianapolis, Ind
| | - Linden A Green
- Division of Vascular Surgery, Department of Surgery, Indiana University School of Medicine, Richard Roudebush VA Medical Center, Indianapolis, Ind
| | - Ashley R Gutwein
- Division of Vascular Surgery, Department of Surgery, Indiana University School of Medicine, Richard Roudebush VA Medical Center, Indianapolis, Ind
| | - Alok K Gupta
- Division of Vascular Surgery, Department of Surgery, Indiana University School of Medicine, Richard Roudebush VA Medical Center, Indianapolis, Ind
| | - Clifford M Babbey
- Division of Vascular Surgery, Department of Surgery, Indiana University School of Medicine, Richard Roudebush VA Medical Center, Indianapolis, Ind
| | - Raghu L Motaganahalli
- Division of Vascular Surgery, Department of Surgery, Indiana University School of Medicine, Richard Roudebush VA Medical Center, Indianapolis, Ind
| | - Andres Fajardo
- Division of Vascular Surgery, Department of Surgery, Indiana University School of Medicine, Richard Roudebush VA Medical Center, Indianapolis, Ind
| | - Michael P Murphy
- Division of Vascular Surgery, Department of Surgery, Indiana University School of Medicine, Richard Roudebush VA Medical Center, Indianapolis, Ind.
| |
Collapse
|
21
|
Higashi T, Mai Y, Mazaki Y, Miwa S. Intracellular Ca 2+ is an essential factor for cell damage induced by unsaturated carbonyl compounds. J Biosci Bioeng 2017; 124:680-684. [PMID: 28751126 DOI: 10.1016/j.jbiosc.2017.07.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2017] [Revised: 06/21/2017] [Accepted: 07/07/2017] [Indexed: 01/09/2023]
Abstract
The unsaturated carbonyl compounds are known as the environmental pollutants. Acrolein (ACR) and methyl vinyl ketone (MVK) are representative unsaturated carbonyl compounds. ACR is contained in smoke, automobile exhaust, industrial waste, and several foods. MVK is widely used as the industrial chemical. Although ACR and MVK are highly toxic, the molecular mechanism for their cytotoxicity has been unclear. We have previously reported that ACR and MVK are major cytotoxic compounds in the gas phase of cigarette smoke, and protein kinase C (PKC) inhibitor and NADPH oxidases inhibitor partially rescued cells from ACR- or MVK-induced cell death (Noya et al., Toxicology, 314, 1-10, 2013). PKC translocation, which is hallmark for PKC activation, and cell damage were induced by treatment of cultured cells with ACR or MVK. Intracellular Ca2+ chelator completely suppressed ACR- or MVK-induced PKC translocation to the cell membrane and cell damage, while extracellular Ca2+ chelator had no effects on ACR- and MVK-induced cytotoxicity. These results suggest that intracellular Ca2+ is an essential factor for cell damage caused by both PKC-dependent and PKC-independent pathways, and mobilization of Ca2+ from intracellular Ca2+ stores is induced by ACR or MVK.
Collapse
Affiliation(s)
- Tsunehito Higashi
- Department of Cellular Pharmacology, Graduate School of Medicine, Hokkaido University, North 15, West 7, Kita-ku, Sapporo, Hokkaido 060-8638, Japan.
| | - Yosuke Mai
- Department of Cellular Pharmacology, Graduate School of Medicine, Hokkaido University, North 15, West 7, Kita-ku, Sapporo, Hokkaido 060-8638, Japan
| | - Yuichi Mazaki
- Department of Cellular Pharmacology, Graduate School of Medicine, Hokkaido University, North 15, West 7, Kita-ku, Sapporo, Hokkaido 060-8638, Japan
| | - Soichi Miwa
- Department of Cellular Pharmacology, Graduate School of Medicine, Hokkaido University, North 15, West 7, Kita-ku, Sapporo, Hokkaido 060-8638, Japan
| |
Collapse
|
22
|
Sabbione F, Keitelman IA, Iula L, Ferrero M, Giordano MN, Baldi P, Rumbo M, Jancic C, Trevani AS. Neutrophil Extracellular Traps Stimulate Proinflammatory Responses in Human Airway Epithelial Cells. J Innate Immun 2017; 9:387-402. [PMID: 28467984 DOI: 10.1159/000460293] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2016] [Accepted: 02/08/2017] [Indexed: 12/13/2022] Open
Abstract
Tissue injury leads to the release of uric acid (UA). At high local concentrations, UA can form monosodium urate crystals (MSU). MSU and UA stimulate neutrophils to release extracellular traps (NET). Here, we investigated whether these NET could be involved in the development of inflammation by stimulating cytokine release by airway epithelial cells. We found that NET significantly increased the secretion of CXCL8/IL-8 and IL-6 by alveolar and bronchial epithelial cells. These effects were not observed when NETosis was inhibited by Diphenyleneiodonium, elastase inhibitor, or Cl-amidine. Similar findings were made with NET induced by cigarette smoke extract, suggesting that NET proinflammatory capacity is independent of the inducing stimulus. Furthermore, NET affected neither the viability and morphology of epithelial cells nor the barrier integrity of polarized cells. The epithelial stimulatory capacity of NET was not affected by degradation of DNA with micrococcal nuclease, treatment with heparin, or inhibition of the elastase immobilized to DNA, but it was significantly reduced by pretreatment with an anti-HMGB-1 blocking antibody. Altogether, our findings indicate that NET exert direct proinflammatory effects on airway epithelial cells that might contribute in vivo to the further recruitment of neutrophils and the perpetuation of inflammation upon lung tissue damage.
Collapse
Affiliation(s)
- Florencia Sabbione
- Laboratorio de Inmunidad Innata, Instituto de Medicina Experimental (IMEX)-CONICET, Academia Nacional de Medicina, Buenos Aires, Argentina
| | | | | | | | | | | | | | | | | |
Collapse
|
23
|
Saruya S, Yamashiro T, Matsuoka S, Matsushita S, Yagihashi K, Nakajima Y. Decrease in Small Pulmonary Vessels on Chest Computed Tomography in Light Smokers Without COPD: An Early Change, but Correlated with Smoking Index. Lung 2017; 195:179-184. [PMID: 28224233 DOI: 10.1007/s00408-017-9985-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2016] [Accepted: 02/07/2017] [Indexed: 01/08/2023]
Abstract
PURPOSE The aim of this study was to evaluate the relationship between the amount of smoking and the cross-sectional area (CSA) of small pulmonary vessels in light smokers without a diagnosis of chronic obstructive pulmonary disease (COPD). METHODS This retrospective study was approved by our institutional review board, which waived the need for informed consent from patients. The study included 34 current smokers without COPD, who were defined as light smokers based on their smoking history (≤25 pack years). The CSA of small pulmonary vessels (<5 mm2 [CSA<5]) was measured on computed tomography (CT) scans, and the percentage of total CSA of the lung (%CSA<5) was calculated. The extent of emphysema was also assessed as the percentage of low attenuation area (%LAA, <-950 Hounsfield units). The correlations of %CSA<5 and %LAA with pack years were determined using the Spearman rank correlation. RESULTS There was a significant negative correlation between %CSA<5 and pack years, whereas no significant correlation was found between %LAA and pack years. The correlations between pack years and percent predicted forced expiratory volume in 1 s (FEV1) and FEV1/forced vital capacity were not significant. CONCLUSIONS The percentage of total CSA of the lung made up of small pulmonary vessels in light smokers without COPD significantly decreases with increasing amount of smoking, in contrast to emphysema measurements. This suggests that small pulmonary vessels might have been injured or might have degenerated because of smoking, and might represent an initial stage in the development of COPD.
Collapse
Affiliation(s)
- Shinji Saruya
- Department of Radiology, St. Marianna University School of Medicine, 2-16-1 Sugao, Miyamae-ku, Kawasaki, Kanagawa, 216-8511, Japan.
| | - Tsuneo Yamashiro
- Department of Radiology, St. Marianna University School of Medicine, 2-16-1 Sugao, Miyamae-ku, Kawasaki, Kanagawa, 216-8511, Japan.,Department of Radiology, Graduate School of Medical Science, University of the Ryukyus, 207 Uehara, Nishihara, Okinawa, 903-0215, Japan
| | - Shin Matsuoka
- Department of Radiology, St. Marianna University School of Medicine, 2-16-1 Sugao, Miyamae-ku, Kawasaki, Kanagawa, 216-8511, Japan
| | - Shoichiro Matsushita
- Department of Radiology, St. Marianna University School of Medicine, 2-16-1 Sugao, Miyamae-ku, Kawasaki, Kanagawa, 216-8511, Japan
| | - Kunihiro Yagihashi
- Department of Radiology, St. Marianna University School of Medicine, 2-16-1 Sugao, Miyamae-ku, Kawasaki, Kanagawa, 216-8511, Japan
| | - Yasuo Nakajima
- Department of Radiology, St. Marianna University School of Medicine, 2-16-1 Sugao, Miyamae-ku, Kawasaki, Kanagawa, 216-8511, Japan
| |
Collapse
|
24
|
Higashi T, Mai Y, Mazaki Y, Horinouchi T, Miwa S. A Standardized Method for the Preparation of a Gas Phase Extract of Cigarette Smoke. Biol Pharm Bull 2016; 39:898-902. [PMID: 27251490 DOI: 10.1248/bpb.b16-00062] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2023]
Abstract
The gas phase of cigarette smoke is important from the viewpoint of human health, because it can pass through alveolar epithelium and enter the circulation. There is no standard method for the preparation of a gas phase extract of cigarette smoke (CSE), although CSE is widely used for research instead of whole cigarette smoke. We have established a standard method for the preparation of CSE. One cigarette per trial is continuously combusted under a reduced pressure generated by an aspiration pump with a velocity of 1.050 L/min: the main stream of the smoke is passed through a Cambridge filter to remove tar, and subsequently, bubbled through a glass ball filter (pore size, 20-30 µm) into 15 mL of phosphate-buffered saline (PBS). To express the concentration of CSE, a virtual tar concentration is introduced, which is calculated assuming that tar trapped on the Cambridge filter is dissolved in the PBS. CSEs prepared from smaller numbers of cigarettes (original virtual tar concentration≤15 mg/mL) show similar concentration-response curves for cytotoxicity versus virtual tar concentrations. CSEs prepared from various brands of cigarettes and by different smoking regimes (continuous and puff smoking) show similar cytotoxic potency if the virtual tar concentrations are the same. In conclusion, using the standardized method for CSE preparation in combination with the virtual tar concentration, it becomes possible to simply and rapidly prepare standard CSEs with defined concentrations from any brand of cigarettes, which are toxicologically equivalent to CSE prepared by puff smoking.
Collapse
Affiliation(s)
- Tsunehito Higashi
- Department of Cellular Pharmacology, Graduate School of Medicine, Hokkaido University
| | | | | | | | | |
Collapse
|
25
|
Horiyama S, Hatai M, Takahashi Y, Date S, Masujima T, Honda C, Ichikawa A, Yoshikawa N, Nakamura K, Kunitomo M, Takayama M. Intracellular Metabolism of α,β-Unsaturated Carbonyl Compounds, Acrolein, Crotonaldehyde and Methyl Vinyl Ketone, Active Toxicants in Cigarette Smoke: Participation of Glutathione Conjugation Ability and Aldehyde–Ketone Sensitive Reductase Activity. Chem Pharm Bull (Tokyo) 2016; 64:585-93. [DOI: 10.1248/cpb.c15-00986] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Shizuyo Horiyama
- School of Pharmacy and Pharmaceutical Sciences, Mukogawa Women’s University
| | - Mayuko Hatai
- School of Pharmacy and Pharmaceutical Sciences, Mukogawa Women’s University
| | - Yuta Takahashi
- School of Pharmacy and Pharmaceutical Sciences, Mukogawa Women’s University
| | - Sachiko Date
- Riken Quantitative Biology Center, OLABB, Osaka University
| | | | - Chie Honda
- School of Pharmacy and Pharmaceutical Sciences, Mukogawa Women’s University
| | - Atsushi Ichikawa
- School of Pharmacy and Pharmaceutical Sciences, Mukogawa Women’s University
| | - Noriko Yoshikawa
- School of Pharmacy and Pharmaceutical Sciences, Mukogawa Women’s University
| | - Kazuki Nakamura
- School of Pharmacy and Pharmaceutical Sciences, Mukogawa Women’s University
| | - Masaru Kunitomo
- School of Pharmacy and Pharmaceutical Sciences, Mukogawa Women’s University
| | - Mitsuo Takayama
- International Graduate School of Arts and Sciences, Yokohama City University
| |
Collapse
|
26
|
Horinouchi T, Higashi T, Mazaki Y, Miwa S. Carbonyl Compounds in the Gas Phase of Cigarette Mainstream Smoke and Their Pharmacological Properties. Biol Pharm Bull 2016; 39:909-14. [PMID: 27251492 DOI: 10.1248/bpb.b16-00025] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Cigarette mainstream smoke is composed of gas and tar phases and contains >4000 chemical constituents, including nicotine and tar. The substances in the gas phase but not in the tar phase can pass through the airway epithelial barrier, enter the systemic circulation via the pulmonary circulation, and increase systemic oxidative damage, leading to the development of cigarette smoking-related diseases such as atherosclerosis. Recently, we identified some stable carbonyl compounds, including acrolein (ACR) and methyl vinyl ketone (MVK), as major cytotoxic factors in nicotine- and tar-free cigarette smoke extract (CSE) of the gas phase. CSE, ACR, and MVK induce protein kinase C (PKC)-dependent activation of reduced nicotinamide adenine dinucleotide phosphate (NADPH) oxidase (NOX) and subsequent generation of reactive oxygen species (ROS) via NOX, causing plasma membrane damage and cell apoptosis. CSE, ACR, and MVK also trigger carbonylation of PKC, which is an irreversible oxidative modification. Cell damage and PKC carbonylation in response to treatment with CSE, ACR, or MVK are abolished by thiol-containing antioxidants such as N-acetyl-L-cysteine and reduced glutathione. Thus pharmacological modulation of PKC and NOX activities and the trapping of ROS are potential strategies for the prevention of diseases related to cigarette smoking.
Collapse
Affiliation(s)
- Takahiro Horinouchi
- Department of Cellular Pharmacology, Hokkaido University Graduate School of Medicine
| | | | | | | |
Collapse
|