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Kim JW, Kim JH, Jeong JS, Kim CY, Chung EH, Kim SH, Hong EJ, Kwon HJ, Ko JW, Kim TW. Green tea extract suppresses airway inflammation via oxidative stress-driven MAPKs/MMP-9 signaling in asthmatic mice and human airway epithelial cells. Front Immunol 2024; 15:1362404. [PMID: 38745671 PMCID: PMC11091254 DOI: 10.3389/fimmu.2024.1362404] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2023] [Accepted: 04/18/2024] [Indexed: 05/16/2024] Open
Abstract
Introduction The anti-inflammatory effect of green tea extract (GTE) has been confirmed in asthmatic mice, however, the pharmacological mechanism is not fully elucidated. Methods To investigate the therapeutic efficacy of GTE in asthma and identify specific pathways, murine model of allergic asthma was established by ovalbumin (OVA) sensitization and the challenge for 4 weeks, with oral treatment using GTE and dexamethasone (DEX). Inflammatory cell counts, cytokines, OVA-specific IgE, airway hyperreactivity, and antioxidant markers in the lung were evaluated. Also, pulmonary histopathological analysis and western blotting were performed. In vitro, we established the model by stimulating the human airway epithelial cell line NCI-H292 using lipopolysaccharide, and treating with GTE and mitogen-activated protein kinases (MAPKs) inhibitors. Results The GTE100 and GTE400 groups showed a decrease in airway hyperresponsiveness and the number of inflammatory cells in the bronchoalveolar lavage fluid (BALF) compared to the OVA group. GTE treatment also reduced interleukin (IL)-13, IL-5, and IL-4 levels in the BALF, and OVA-specific immunoglobulin E levels in the serum compared to those in the OVA group. GTE treatment decreased OVA-induced mucus secretion and airway inflammation. In addition, GTE suppressed the oxidative stress, and phosphorylation of MAPKs, which generally occurs after exposure to OVA. GTE administration also reduced matrix metalloproteinase-9 activity and protein levels. Conclusion GTE effectively inhibited asthmatic respiratory inflammation and mucus hyperproduction induced by OVA inhalation. These results suggest that GTE has the potential to be used for the treatment of asthma.
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Affiliation(s)
- Jeong-Won Kim
- College of Veterinary Medicine (BK21 FOUR Program), Chungnam National University, Daejeon, Republic of Korea
| | - Jin-Hwa Kim
- College of Veterinary Medicine (BK21 FOUR Program), Chungnam National University, Daejeon, Republic of Korea
| | - Ji-Soo Jeong
- College of Veterinary Medicine (BK21 FOUR Program), Chungnam National University, Daejeon, Republic of Korea
| | - Chang-Yeop Kim
- College of Veterinary Medicine (BK21 FOUR Program), Chungnam National University, Daejeon, Republic of Korea
| | - Eun-Hye Chung
- College of Veterinary Medicine (BK21 FOUR Program), Chungnam National University, Daejeon, Republic of Korea
| | - Sung-Hwan Kim
- Jeonbuk Department of Inhalation Research, Korea Institute of Toxicology, Jeongeup, Republic of Korea
| | - Eui-Ju Hong
- College of Veterinary Medicine (BK21 FOUR Program), Chungnam National University, Daejeon, Republic of Korea
| | - Hyo-Jung Kwon
- College of Veterinary Medicine (BK21 FOUR Program), Chungnam National University, Daejeon, Republic of Korea
| | - Je-Won Ko
- College of Veterinary Medicine (BK21 FOUR Program), Chungnam National University, Daejeon, Republic of Korea
| | - Tae-Won Kim
- College of Veterinary Medicine (BK21 FOUR Program), Chungnam National University, Daejeon, Republic of Korea
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Zhu Z, Zhao S, Li J, Wang Y, Xu L, Jia Y, Li Z, Li W, Chen G, Wu X. Development and application of a deep learning-based comprehensive early diagnostic model for chronic obstructive pulmonary disease. Respir Res 2024; 25:167. [PMID: 38637823 PMCID: PMC11027407 DOI: 10.1186/s12931-024-02793-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2023] [Accepted: 03/28/2024] [Indexed: 04/20/2024] Open
Abstract
BACKGROUND Chronic obstructive pulmonary disease (COPD) is a frequently diagnosed yet treatable condition, provided it is identified early and managed effectively. This study aims to develop an advanced COPD diagnostic model by integrating deep learning and radiomics features. METHODS We utilized a dataset comprising CT images from 2,983 participants, of which 2,317 participants also provided epidemiological data through questionnaires. Deep learning features were extracted using a Variational Autoencoder, and radiomics features were obtained using the PyRadiomics package. Multi-Layer Perceptrons were used to construct models based on deep learning and radiomics features independently, as well as a fusion model integrating both. Subsequently, epidemiological questionnaire data were incorporated to establish a more comprehensive model. The diagnostic performance of standalone models, the fusion model and the comprehensive model was evaluated and compared using metrics including accuracy, precision, recall, F1-score, Brier score, receiver operating characteristic curves, and area under the curve (AUC). RESULTS The fusion model exhibited outstanding performance with an AUC of 0.952, surpassing the standalone models based solely on deep learning features (AUC = 0.844) or radiomics features (AUC = 0.944). Notably, the comprehensive model, incorporating deep learning features, radiomics features, and questionnaire variables demonstrated the highest diagnostic performance among all models, yielding an AUC of 0.971. CONCLUSION We developed and implemented a data fusion strategy to construct a state-of-the-art COPD diagnostic model integrating deep learning features, radiomics features, and questionnaire variables. Our data fusion strategy proved effective, and the model can be easily deployed in clinical settings. TRIAL REGISTRATION Not applicable. This study is NOT a clinical trial, it does not report the results of a health care intervention on human participants.
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Affiliation(s)
- Zecheng Zhu
- Center of Clinical Big Data and Analytics of The Second Affiliated Hospital and Department of Big Data in Health Science School of Public Health, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Shunjin Zhao
- Department of Respiratory and Critical Care Medicine, The Second Affiliated Hospital of Zhejiang University School of Medicine, Lanxi Branch (Lanxi People's Hospital), Hangzhou, Zhejiang, China
| | - Jiahui Li
- Center of Clinical Big Data and Analytics of The Second Affiliated Hospital and Department of Big Data in Health Science School of Public Health, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Yuting Wang
- Center of Clinical Big Data and Analytics of The Second Affiliated Hospital and Department of Big Data in Health Science School of Public Health, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Luopiao Xu
- Center of Clinical Big Data and Analytics of The Second Affiliated Hospital and Department of Big Data in Health Science School of Public Health, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Yubing Jia
- Center of Clinical Big Data and Analytics of The Second Affiliated Hospital and Department of Big Data in Health Science School of Public Health, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Zihan Li
- Center of Clinical Big Data and Analytics of The Second Affiliated Hospital and Department of Big Data in Health Science School of Public Health, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Wenyuan Li
- Center of Clinical Big Data and Analytics of The Second Affiliated Hospital and Department of Big Data in Health Science School of Public Health, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Gang Chen
- College of Computer Science and Technology, Zhejiang University, Hangzhou, Zhejiang, China.
| | - Xifeng Wu
- Center of Clinical Big Data and Analytics of The Second Affiliated Hospital and Department of Big Data in Health Science School of Public Health, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China.
- National Institute for Data Science in Health and Medicine, Zhejiang University, Hangzhou, Zhejiang, China.
- The Key Laboratory of Intelligent Preventive Medicine of Zhejiang Province, Hangzhou, Zhejiang, China.
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Chen L, Deng Y, Wang T, Lin X, Zheng L, Chen X, Chen T. Tea consumption and risk of lung diseases: a two‑sample Mendelian randomization study. BMC Pulm Med 2023; 23:461. [PMID: 37993830 PMCID: PMC10664472 DOI: 10.1186/s12890-023-02762-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2023] [Accepted: 11/14/2023] [Indexed: 11/24/2023] Open
Abstract
BACKGROUND Numerous studies have reported the association between tea intake and lung diseases. However, the probable relationship between tea consumption on lung diseases still remain controversial and it is unclear whether these findings are due to reverse causality or confounding factor. METHODS In order to systematically investigate the causal connection between tea intake on respiratory system disorders, we employed a two-sample Mendelian randomized (MR) study. Genetic instruments for tea intake were identified from a genome-wide association study (GWAS) involving 447,385 individuals. Data on lung diseases were collected from a variety of publicly available genome-wide association studies. The main method used for MR analysis is the inverse variance weighting (IVW) method. To ensure the accuracy of the findings, further sensitivity analysis was conducted. RESULTS The IVW method in our MR analysis revealed no evidence to support a causal relationship between tea intake and lung diseases (IPF: OR = 0.997, 95% CI = 0.994-1.000, p = 0.065; Lung cancer: OR = 1.003, 95% CI = 0.998-1.008, P = 0.261; COPD: OR = 1.001, 95% CI = 0.993-1.006, p = 0.552; acute bronchitis: OR = 0.919, 95% CI = 0.536-1.576, p = 0.759; tuberculosis: OR = 1.002, 95% CI = 0.998-1.008, p = 0.301; pneumonia: OR = 0.789, 95% CI = 0.583-1.068, p = 0.125). The reliability of the results was further demonstrated by four additional MR analysis techniques and additional sensitivity testing. CONCLUSION We found no evidence of a link between tea intake on lung diseases in our MR results based on genetic information.
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Affiliation(s)
- Linjie Chen
- Institute of Respiratory Diseases, Xiamen Medical College, Xiamen, Fujian Province, 361023, P.R. China
- Fujian Provincial Key Laboratory of Functional and Clinical Translational Medicine, Xiamen Medical College, Xiamen, Fujian Province, 361023, P.R. China
- Department of Clinical Medicine, Xiamen Medical College, Xiamen, Fujian Province, 361023, P.R. China
| | - Yaru Deng
- Institute of Respiratory Diseases, Xiamen Medical College, Xiamen, Fujian Province, 361023, P.R. China
- Fujian Provincial Key Laboratory of Functional and Clinical Translational Medicine, Xiamen Medical College, Xiamen, Fujian Province, 361023, P.R. China
| | - Tiexu Wang
- Institute of Respiratory Diseases, Xiamen Medical College, Xiamen, Fujian Province, 361023, P.R. China
- Fujian Provincial Key Laboratory of Functional and Clinical Translational Medicine, Xiamen Medical College, Xiamen, Fujian Province, 361023, P.R. China
| | - Xinyu Lin
- Institute of Respiratory Diseases, Xiamen Medical College, Xiamen, Fujian Province, 361023, P.R. China
- Fujian Provincial Key Laboratory of Functional and Clinical Translational Medicine, Xiamen Medical College, Xiamen, Fujian Province, 361023, P.R. China
| | - Lukun Zheng
- Institute of Respiratory Diseases, Xiamen Medical College, Xiamen, Fujian Province, 361023, P.R. China
- Fujian Provincial Key Laboratory of Functional and Clinical Translational Medicine, Xiamen Medical College, Xiamen, Fujian Province, 361023, P.R. China
| | - Xiaohong Chen
- Institute of Respiratory Diseases, Xiamen Medical College, Xiamen, Fujian Province, 361023, P.R. China.
- Fujian Provincial Key Laboratory of Functional and Clinical Translational Medicine, Xiamen Medical College, Xiamen, Fujian Province, 361023, P.R. China.
| | - Tongsheng Chen
- Institute of Respiratory Diseases, Xiamen Medical College, Xiamen, Fujian Province, 361023, P.R. China.
- Fujian Provincial Key Laboratory of Functional and Clinical Translational Medicine, Xiamen Medical College, Xiamen, Fujian Province, 361023, P.R. China.
- Department of Physiology, Xiamen Medical College, Xiamen, Fujian Province, 361023, P.R. China.
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Kang S, Kim HY, Lee AY, Kim HS, Park JH, Moon BC, Nam HH, Chae SW, Jung B, Moon C, Shin IS, Kim JS, Seo YS. Camellia sinensis (L.) Kuntze Extract Attenuates Ovalbumin-Induced Allergic Asthma by Regulating Airway Inflammation and Mucus Hypersecretion. Pharmaceutics 2023; 15:2355. [PMID: 37765323 PMCID: PMC10537373 DOI: 10.3390/pharmaceutics15092355] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Revised: 08/29/2023] [Accepted: 09/07/2023] [Indexed: 09/29/2023] Open
Abstract
Asthma is a pulmonary disease induced by the inhalation of aeroallergens and subsequent inappropriate immune responses. Camellia sinensis (L.) Kuntze has been evaluated as an effective antioxidant supplement produced from bioactive compounds, including flavonoids. In this study, we aimed to determine the effects of Camellia sinensis (L.) Kuntze extract (CE) on ovalbumin-induced allergic asthma. The components of CE were analyzed using high-performance liquid chromatography (HPLC) chromatogram patterns, and asthmatic animal models were induced via ovalbumin treatment. The antioxidant and anti-inflammatory effects of CE were evaluated using 2,2-diphenyl-1-picryl-hydrazyl-hydrate (DPPH), 2,2'-azino-bis-3-ethylbenzthiazoline-6-sulphonic acid (ABTS), and nitric oxide (NO) assays. Seven compounds were detected in the CE chromatogram. In the ovalbumin-induced mouse model, CE treatment significantly decreased the inflammation index in the lung tissue. CE also significantly decreased eosinophilia and the production of inflammatory cytokines and OVA-specific IgE in animals with asthma. Collectively, our results indicate that CE has anti-inflammatory and antioxidant activities, and that CE treatment suppresses asthmatic progression, including mucin accumulation, inflammation, and OVA-specific IgE production.
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Affiliation(s)
- Sohi Kang
- College of Veterinary Medicine and BK21 FOUR Program, Chonnam National University, Gwangju 61186, Republic of Korea; (S.K.); (B.J.); (C.M.); (I.S.S.)
| | - Hyun-Yong Kim
- Herbal Medicine Resources Research Center, Korea Institute of Oriental Medicine, 111, Geonjae-ro, Naju-si 58245, Jeollanam-do, Republic of Korea; (H.-Y.K.); (A.Y.L.); (H.S.K.); (J.H.P.); (B.C.M.); (H.H.N.)
| | - A Yeong Lee
- Herbal Medicine Resources Research Center, Korea Institute of Oriental Medicine, 111, Geonjae-ro, Naju-si 58245, Jeollanam-do, Republic of Korea; (H.-Y.K.); (A.Y.L.); (H.S.K.); (J.H.P.); (B.C.M.); (H.H.N.)
| | - Hyo Seon Kim
- Herbal Medicine Resources Research Center, Korea Institute of Oriental Medicine, 111, Geonjae-ro, Naju-si 58245, Jeollanam-do, Republic of Korea; (H.-Y.K.); (A.Y.L.); (H.S.K.); (J.H.P.); (B.C.M.); (H.H.N.)
| | - Jun Hong Park
- Herbal Medicine Resources Research Center, Korea Institute of Oriental Medicine, 111, Geonjae-ro, Naju-si 58245, Jeollanam-do, Republic of Korea; (H.-Y.K.); (A.Y.L.); (H.S.K.); (J.H.P.); (B.C.M.); (H.H.N.)
| | - Byeong Cheol Moon
- Herbal Medicine Resources Research Center, Korea Institute of Oriental Medicine, 111, Geonjae-ro, Naju-si 58245, Jeollanam-do, Republic of Korea; (H.-Y.K.); (A.Y.L.); (H.S.K.); (J.H.P.); (B.C.M.); (H.H.N.)
| | - Hyeon Hwa Nam
- Herbal Medicine Resources Research Center, Korea Institute of Oriental Medicine, 111, Geonjae-ro, Naju-si 58245, Jeollanam-do, Republic of Korea; (H.-Y.K.); (A.Y.L.); (H.S.K.); (J.H.P.); (B.C.M.); (H.H.N.)
- Center for Companion Animal New Drug Development, Jeonbuk Branch, Korea Institute of Toxicology, Jeongeup 56212, Jeollabuk-do, Republic of Korea;
| | - Sung-Wook Chae
- Center for Companion Animal New Drug Development, Jeonbuk Branch, Korea Institute of Toxicology, Jeongeup 56212, Jeollabuk-do, Republic of Korea;
- KM Convergence Research Division, Korea Institute of Oriental Medicine, 111, Geonjae-ro, Naju-si 58245, Jeollanam-do, Republic of Korea
| | - Bokyung Jung
- College of Veterinary Medicine and BK21 FOUR Program, Chonnam National University, Gwangju 61186, Republic of Korea; (S.K.); (B.J.); (C.M.); (I.S.S.)
| | - Changjong Moon
- College of Veterinary Medicine and BK21 FOUR Program, Chonnam National University, Gwangju 61186, Republic of Korea; (S.K.); (B.J.); (C.M.); (I.S.S.)
| | - In Sik Shin
- College of Veterinary Medicine and BK21 FOUR Program, Chonnam National University, Gwangju 61186, Republic of Korea; (S.K.); (B.J.); (C.M.); (I.S.S.)
| | - Joong Sun Kim
- College of Veterinary Medicine and BK21 FOUR Program, Chonnam National University, Gwangju 61186, Republic of Korea; (S.K.); (B.J.); (C.M.); (I.S.S.)
| | - Yun-Soo Seo
- Herbal Medicine Resources Research Center, Korea Institute of Oriental Medicine, 111, Geonjae-ro, Naju-si 58245, Jeollanam-do, Republic of Korea; (H.-Y.K.); (A.Y.L.); (H.S.K.); (J.H.P.); (B.C.M.); (H.H.N.)
- KM Convergence Research Division, Korea Institute of Oriental Medicine, 111, Geonjae-ro, Naju-si 58245, Jeollanam-do, Republic of Korea
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Fu YS, Kang N, Yu Y, Mi Y, Guo J, Wu J, Weng CF. Polyphenols, flavonoids and inflammasomes: the role of cigarette smoke in COPD. Eur Respir Rev 2022; 31:31/164/220028. [PMID: 35705209 PMCID: PMC9648508 DOI: 10.1183/16000617.0028-2022] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2022] [Accepted: 04/20/2022] [Indexed: 11/24/2022] Open
Abstract
COPD is predicted to become the third leading cause of morbidity and mortality worldwide by 2030. Cigarette smoking (active or passive) is one of its chief causes, with about 20% of cigarette smokers developing COPD from cigarette smoke (CS)-induced irreversible damage and sustained inflammation of the airway epithelium. Inflammasome activation leads to the cleavage of pro-interleukin (IL)-1β and pro-IL-18, along with the release of pro-inflammatory cytokines via gasdermin D N-terminal fragment membrane pores, which further triggers acute phase pro-inflammatory responses and concurrent pyroptosis. There is currently intense interest in the role of nucleotide-binding oligomerisation domain-like receptor family, pyrin domain containing protein-3 inflammasomes in chronic inflammatory lung diseases such as COPD and their potential for therapeutic targeting. Phytochemicals including polyphenols and flavonoids have phyto-medicinal benefits in CS-COPD. Here, we review published articles from the last decade regarding the known associations between inflammasome-mediated responses and ameliorations in pre-clinical manifestations of CS-COPD via polyphenol and flavonoid treatment, with a focus on the underlying mechanistic insights. This article will potentially assist the development of drugs for the prevention and therapy of COPD, particularly in cigarette smokers. This review compiles current investigations into the role of polyphenols/flavonoids in the alleviation of cigarette smoke-induced inflammasome; notably it provides a promising hit for rectifying the treatment of COPD.https://bit.ly/36OcUO9
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Affiliation(s)
- Yaw-Syan Fu
- Anatomy and Functional Physiology Section, Dept of Basic Medical Science, Xiamen Medical College, Xiamen, Fujian, China.,Institute of Respiratory Disease, Dept of Basic Medical Science, Xiamen Medical College, Xiamen, Fujian, China
| | - Ning Kang
- Dept of Otorhinolaryngology, the Second Affiliated Hospital of Xiamen Medical College, Xiamen, Fujian, China
| | - Yanping Yu
- Institute of Respiratory Disease, Dept of Basic Medical Science, Xiamen Medical College, Xiamen, Fujian, China
| | - Yan Mi
- Institute of Respiratory Disease, Dept of Basic Medical Science, Xiamen Medical College, Xiamen, Fujian, China
| | - Jialin Guo
- Anatomy and Functional Physiology Section, Dept of Basic Medical Science, Xiamen Medical College, Xiamen, Fujian, China
| | - Jingyi Wu
- Anatomy and Functional Physiology Section, Dept of Basic Medical Science, Xiamen Medical College, Xiamen, Fujian, China
| | - Ching-Feng Weng
- Anatomy and Functional Physiology Section, Dept of Basic Medical Science, Xiamen Medical College, Xiamen, Fujian, China .,Institute of Respiratory Disease, Dept of Basic Medical Science, Xiamen Medical College, Xiamen, Fujian, China
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Liang Y, Chu PH, Tian L, Ho KF, Ip MSM, Mak JCW. Targeting mitochondrial permeability transition pore ameliorates PM 2.5-induced mitochondrial dysfunction in airway epithelial cells. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2022; 295:118720. [PMID: 34953947 DOI: 10.1016/j.envpol.2021.118720] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2021] [Revised: 12/15/2021] [Accepted: 12/19/2021] [Indexed: 06/14/2023]
Abstract
Particulate matter with aerodynamic diameter not larger than 2.5 μm (PM2.5) escalated the risk of respiratory diseases. Mitochondrial dysfunction may play a pivotal role in PM2.5-induced airway injury. However, the potential effect of PM2.5 on mitochondrial permeability transition pore (mPTP)-related airway injury is still unknown. This study aimed to investigate the role of mPTP in PM2.5-induced mitochondrial dysfunction in airway epithelial cells in vitro. PM2.5 significantly reduced cell viability and caused apoptosis in BEAS-2B cells. We also found PM2.5 caused cellular and mitochondrial morphological alterations, evidenced by the disappearance of mitochondrial cristae, mitochondrial swelling, and the rupture of the outer mitochondrial membrane. PM2.5 induced mPTP opening via upregulation of voltage-dependent anion-selective channel (VDAC), leading to deprivation of mitochondrial membrane potential, increased mitochondrial reactive oxygen species (ROS) generation and intracellular calcium level. PM2.5 suppressed mitochondrial respiratory function by reducing basal and maximal respiration, and ATP production. The mPTP targeting compounds cyclosporin A [CsA; a potent inhibitor of cyclophilin D (CypD)] and VBIT-12 (a selective VDAC1 inhibitor) significantly inhibited PM2.5-induced mPTP opening and apoptosis, and preserved mitochondrial function by restoring mitochondrial membrane potential, reducing mitochondrial ROS generation and intracellular calcium content, and maintaining mitochondrial respiration function. Our data further demonstrated that PM2.5 caused reduction in nuclear expressions of PPARγ and PGC-1α, which were reversed in the presence of CsA. These findings suggest that mPTP might be a potential therapeutic target in the treatment of PM2.5-induced airway injury.
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Affiliation(s)
- Yingmin Liang
- Department of Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong
| | - Pak Hin Chu
- Department of Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong
| | - Linwei Tian
- School of Public Health, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong
| | - Kin Fai Ho
- JC School of Public Health and Primary Care, The Chinese University of Hong Kong, Hong Kong
| | - Mary Sau Man Ip
- Department of Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong
| | - Judith Choi Wo Mak
- Department of Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong; Department of Pharmacology & Pharmacy, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong.
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Liang Y, Du R, Chen R, Chu PH, Ip MSM, Zhang KYB, Mak JCW. Therapeutic potential and mechanism of Dendrobium officinale polysaccharides on cigarette smoke-induced airway inflammation in rat. Biomed Pharmacother 2021; 143:112101. [PMID: 34474340 DOI: 10.1016/j.biopha.2021.112101] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2021] [Revised: 08/20/2021] [Accepted: 08/23/2021] [Indexed: 11/25/2022] Open
Abstract
Chronic obstructive pulmonary disease (COPD) is among the leading causes of death worldwide, and is characterized by persistent respiratory symptoms and airflow limitation due to chronic airway inflammation. Cigarette smoking is a major risk factor for COPD. This study aims to determine the therapeutic effects of polysaccharides extracted from Dendrobium officinale (DOPs), a valuable traditional Chinese Medicinal herb, on cigarette smoke (CS)-induced airway inflammation in a rat passive smoking model. Male Sprague-Dawley rats were exposed to CS or sham air (SA) as control for a 56-day period. On Day 29, rats were subdivided and given water, DOPs or N-acetylcysteine (NAC) via oral gavage on a daily basis for the remaining duration. DOPs reduced CS-induced oxidative stress as evidenced by reducing malondialdehyde (MDA) levels in the lung. DOPs also exerted potent anti-inflammatory properties as evidenced by a reduction in the number of lymphocytes and monocytes in serum, significantly attenuating infiltration of inflammatory cells in lung tissue, as well as pro-inflammatory mediators in serum, bronchoalveolar lavage (BAL) and lung. Additionally, DOPs inhibited the CS-induced activation of ERK, p38 MAPK and NF-κB signaling pathways. These findings suggest that DOPs may have potentially beneficial effects in limiting smoking-related lung oxidative stress, and inflammation mediated via the inhibition of MAPK and NF-κB signaling pathways in smokers, without or with COPD.
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Affiliation(s)
- Yingmin Liang
- Departments of Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China
| | - Ruixuan Du
- Departments of Pharmacology & Pharmacy, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China
| | - Rui Chen
- Departments of Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China
| | - Pak Hin Chu
- Departments of Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China
| | - Mary Sau Man Ip
- Departments of Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China
| | - Kalin Yan Bo Zhang
- School of Chinese Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China
| | - Judith Choi Wo Mak
- Departments of Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China; Departments of Pharmacology & Pharmacy, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China.
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Ng TP, Gao Q, Gwee X, Chua DQL, Tan WC. Tea Consumption and Risk of Chronic Obstructive Pulmonary Disease in Middle-Aged and Older Singaporean Adults. Int J Chron Obstruct Pulmon Dis 2021; 16:13-23. [PMID: 33442245 PMCID: PMC7800434 DOI: 10.2147/copd.s273406] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Accepted: 10/07/2020] [Indexed: 01/02/2023] Open
Abstract
Objective The anti-oxidant and anti-inflammatory actions of phytochemicals and the smooth muscle relaxant actions of theophylline present in tea may confer pulmonary protection and reduce COPD risk. We investigated tea consumption (black, oolong, or green) association with COPD risks in a population-based cohort study of older adults aged ≥55. Methods GOLD criteria was used to identify prevalent and incident cases of COPD (FEV1/FVC <0.70) among 4617 participants and 920 participants free of COPD at baseline who were assessed at follow-up 4.5 years later. Results Prevalent cases of COPD consumed less tea than their non-COPD counterparts. Estimated odds ratio (OR) and 95% confidence intervals (95% CI) of association with prevalent COPD, adjusted for age, sex, ethnicity, housing type, smoking, alcohol, physical activity and BMI declined across tea consumption levels (p-trend=0.048), and was lowest for ≥3 cups/day (OR=0.77, 95% CI=0.61–0.96). The cumulated incidence of COPD declined across tea consumption categories (p-trend=0.012) and the lowest OR of association (OR=0.35, 95% CI=0.17–0.69) with consuming ≥3 cups/day after co-variate adjustment. Conclusion Different kinds of tea showed similar non-significant trends of associations but appeared to be strongest for green tea. Tea consumption in this Asian population was associated with lowered COPD prevalence and incidence.
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Affiliation(s)
- Tze Pin Ng
- Gerontology Research Programme, Department of Psychological Medicine, National University of Singapore, Singapore
| | - Qi Gao
- Gerontology Research Programme, Department of Psychological Medicine, National University of Singapore, Singapore
| | - Xinyi Gwee
- Gerontology Research Programme, Department of Psychological Medicine, National University of Singapore, Singapore
| | - Denise Q L Chua
- Gerontology Research Programme, Department of Psychological Medicine, National University of Singapore, Singapore
| | - Wan C Tan
- Centre for Heart Lung Innovation, Department of Medicine, University of British Columbia, Vancouver, BC, Canada
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9
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Cui Y, Liu KWK, Ip MSM, Liang Y, Mak JCW. Protective effect of selegiline on cigarette smoke-induced oxidative stress and inflammation in rat lungs in vivo. ANNALS OF TRANSLATIONAL MEDICINE 2020; 8:1418. [PMID: 33313163 PMCID: PMC7723576 DOI: 10.21037/atm-20-2426] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Background Cigarette smoke (CS)-induced build-up of oxidative stress is the leading cause of chronic obstructive pulmonary disease (COPD). Monoamine oxidases (MAOs) are novel sources of reactive oxygen species (ROS) due to the production of hydrogen peroxide (H2O2). However, it remains unclear whether MAO signaling is involved in CS-induced oxidative stress in vivo. This study aimed at investigating the impact of selegiline, a selective MAO-B inhibitor, on CS-induced lung oxidative stress and inflammation in vivo and its underlying mechanism. Methods Sprague Dawley rats were randomly divided into four groups: saline plus sham air (Saline/air), saline plus cigarette smoke (Saline/CS), selegiline plus sham air (Slg/air) and selegiline plus cigarette smoke (Slg/CS). Rats from Saline/air and Saline/CS groups were intraperitoneally injected with saline (2 mL/kg body weight) while rats from Slg/air and Slg/CS groups were injected with selegiline (2 mg/kg body weight) about 30 min prior to exposure daily. The Saline/air and Slg/air groups were exposed to atmospheric air while the Saline/CS and Slg/CS groups were exposed to mainstream CS generated from the whole body inExpose smoking system (SCIREQ, Canada) for twice daily (each for 1 hour with 20 cigarettes). After 7 days, rats were sacrificed to collect bronchoalveolar lavage (BAL) and lung tissues for the measurement of oxidative/anti-oxidative and inflammatory/anti-inflammatory makers respectively. Results CS caused significant elevation of MAO-B activity, reduction of total antioxidant capacity (T-AOC) and rGSH/GSSG ratio, and enhancement of superoxide dismutase (SOD) activity in rat lung. Selegiline significantly only reversed CS-induced elevation of MAO-B activity and reduction of rGSH/GSSG ratio. The CS-induced elevation of heme oxygenase-1 (HO-1) and NAD(P)H quinone dehydrogenase 1 (NQO1) expression via nuclear factor erythroid 2-related factor 2 (Nrf2) was also reversed by selegiline. Despite of CS-induced increase in total cell counts, especially the number of macrophages, selegiline had no effect. Selegiline attenuated CS-induced elevation of pro-inflammatory mediators (CINC-1, MCP-1 and IL-6) and restored CS-induced reduction of anti-inflammatory mediator IL-10 in BAL, which was driven through MAPK and NF-κB. Conclusions Inhibition of MAO-B may provide a promising therapeutic strategy for CS-mediated oxidative stress and inflammation in acute CS-exposed rat lungs.
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Affiliation(s)
- Yuting Cui
- Department of Medicine, The University of Hong Kong, Hong Kong, China
| | - Kenneth W K Liu
- Department of Medicine, The University of Hong Kong, Hong Kong, China.,Research Centre of Heart, Brain, Hormone and Healthy Aging, The University of Hong Kong, Hong Kong, China
| | - Mary S M Ip
- Department of Medicine, The University of Hong Kong, Hong Kong, China.,Research Centre of Heart, Brain, Hormone and Healthy Aging, The University of Hong Kong, Hong Kong, China
| | - Yingmin Liang
- Department of Medicine, The University of Hong Kong, Hong Kong, China
| | - Judith C W Mak
- Department of Medicine, The University of Hong Kong, Hong Kong, China.,Research Centre of Heart, Brain, Hormone and Healthy Aging, The University of Hong Kong, Hong Kong, China.,Pharmacology & Pharmacy, The University of Hong Kong, Hong Kong, China
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10
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The acute effects of cigarette smoke exposure on muscle fiber type dynamics in rats. PLoS One 2020; 15:e0233523. [PMID: 32433675 PMCID: PMC7239437 DOI: 10.1371/journal.pone.0233523] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2019] [Accepted: 05/06/2020] [Indexed: 11/30/2022] Open
Abstract
Reduced exercise capacity is common in people with chronic obstructive pulmonary diseases (COPD) and chronic smokers and is suggested to be related to skeletal muscle dysfunction. Previous studies using human muscle biopsies have shown fiber-type shifting in chronic smokers particularly those with COPD. These results, however, are confounded with aging effects because people with COPD tend to be older. In the present study, we implemented an acute 7-day cigarette smoke-exposed model using Sprague-Dawley rats to evaluate early effects of cigarette smoking on soleus muscles. Rats (n = 5 per group) were randomly assigned to either a sham air (SA) or cigarette smoking (CS) groups of three different concentrations of total particulate matters (TPM) (CSTPM2.5, CSTPM5, CSTPM10). Significantly lower percentages of type I and higher type IIa fiber were detected in the soleus muscle in CS groups when compared with SA group. Of these, only CSTMP10 group exhibited significantly lower citrate synthase activity and higher muscle tumor necrosis factor-α level than that of SA group. Tumor necrosis factor-α level was correlated with the percentage of type I and IIa fibers. However, no significant between-group differences were found in fiber cross-sectional area, physical activities, or lung function assessments. In conclusion, acute smoking may directly trigger the onset of glycolytic fiber type shift in skeletal muscle independent of aging.
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11
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Al-Awaida WJ, Zihlif MA, Al-Ameer HJ, Sharab A, Akash M, Aburubaiha ZA, Fattash IA, Imraish A, Ali KH. The effect of green tea consumption on the expression of antioxidant- and inflammation-related genes induced by nicotine. J Food Biochem 2019; 43:e12874. [PMID: 31353688 DOI: 10.1111/jfbc.12874] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2019] [Revised: 04/01/2019] [Accepted: 04/03/2019] [Indexed: 12/22/2022]
Abstract
The aim of this study is to investigate the protective effect of green tea (GT) against the toxicity of nicotine. BALB/c mice were divided into four groups. Group I received food and water intake ad libidium, Group II received GT solution at a dose of 1 ml/kg body weight orally twice a day via gastric gavage, Group III was injected intraperitoneally with nicotine (2.5 mg/kg) once per day for 4 weeks, and Group IV received both nicotine and GT; GT was introduced using gastric gavage 1 hr before and 1 hr after the nicotine injection. The administration of nicotine altered the cellular antioxidant defense system by inducing inflammation and damage in the tissues of liver, lungs, and kidneys. In addition, nicotine treatment significantly enhanced the expression antioxidant- and inflammation-related genes. There were significant improvements when the nicotine-exposed mice treated with GT. PRACTICAL APPLICATIONS: In this study, it is revealed that the administration of nicotine altered the cellular antioxidant defense system by inducing inflammation manifested by the infiltration of inflammatory cells and damage seen in liver, lungs, and kidneys. GT contributed to the reduction of toxicity of nicotine, probably mediated by free radicals, through downregulation of nicotine-induced upregulated antioxidant- and inflammation-related genes. Never the less, further in depth investigation on characterization of the active constituents of GT responsible for their effect seen here and the mechanism that contributes to the effects seen in this reports is highly demanded. Furthermore, GT extract could be considered as a dietary supplement for the reduction of nicotine toxicity among cigarette smoker.
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Affiliation(s)
- Wajdy J Al-Awaida
- Department of Biology and Biotechnology, American University of Madaba, Madaba, Jordan
| | - Malek A Zihlif
- Faculty of Medicine, Department of Pharmacology, The University of Jordan, Amman, Jordan
| | - Hamzeh J Al-Ameer
- Department of Biology and Biotechnology, American University of Madaba, Madaba, Jordan
| | - Ahmad Sharab
- Faculty of Medicine, Department of Pharmacology, The University of Jordan, Amman, Jordan
| | - Muhanad Akash
- Faculty of Agriculture, Department of Horticulture and Crop Science, The University of Jordan, Amman, Jordan
| | - Zaid A Aburubaiha
- Faculty of Health Sciences, Department of Medical Laboratories, American University of Madaba, Madaba, Jordan
| | - Isam A Fattash
- Department of Biology and Biotechnology, American University of Madaba, Madaba, Jordan
| | - Amer Imraish
- Faculty of Science, Department of Biology, The University of Jordan, Amman, Jordan
| | - Khedhir H Ali
- Faculty of Health Sciences, Department of Medical Laboratories, American University of Madaba, Madaba, Jordan
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12
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Dianat M, Radan M, Badavi M, Mard SA, Bayati V, Ahmadizadeh M. Crocin attenuates cigarette smoke-induced lung injury and cardiac dysfunction by anti-oxidative effects: the role of Nrf2 antioxidant system in preventing oxidative stress. Respir Res 2018; 19:58. [PMID: 29631592 PMCID: PMC5891913 DOI: 10.1186/s12931-018-0766-3] [Citation(s) in RCA: 64] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2018] [Accepted: 04/02/2018] [Indexed: 01/22/2023] Open
Abstract
BACKGROUND Chronic obstructive pulmonary disease (COPD) has been emerging as a great health problem in world. Cigarette smoke is known to cause oxidative stress and deplete glutathione (GSH) levels. Nuclear erythroid-related factor 2 (Nrf2) is involved in transcriptional regulation of glutamate-cysteine ligase catalytic subunit (GCLc). Antioxidant compounds may be of therapeutic value in monitoring disease progression. Crocin demonstrates antioxidant and anti-inflammatory functions. The aim of this study was to investigate the protective role of crocin against CSE-mediated oxidative stress, inflammatory process, Nrf2 modifications and impairment of cardiac function in rats with COPD. METHODS Eighty rats were divided into four groups: Control, Cigarette smoke exposure (CSE), Crocin, Crocin+CS. Each group was divided into the two parts: 1) to evaluate lung inflammatory and oxidative process, 2) to evaluate the effect of Cigarette smoke induced-lung injuries on cardiac electrocardiogram (such as heart rate and QRS complex) and hemodynamic parameters (such as perfusion pressure and left ventricular developed pressure). RESULTS CSE rats showed a significant increase in cotinine concentration (17.24 ng/ml), and inflammatory parameters and a decrease in PO2 (75.87 mmHg) and expression of PKC (0.86 fold), PI3K (0.79 fold), MAPK (0.87 fold), Nrf2 (0.8 fold) and GCLc (0.75 fold) genes, antioxidant activity, and finally cardiac abnormalities in electrocardiogram and hemodynamic parameters. Co-treatment whit crocin could restore all these values to normal levels. CONCLUSIONS CS induced-COPD in rat model provides evidence that chronic CS exposure leads to lung injury and mediated cardiac dysfunction. Crocin co-treatment by modulating of Nrf2 pathway protected lung injury caused by COPD and its related cardiac dysfunction. In this study, we showed the importance of Nrf2 activators as a therapeutic target for the development of novel therapy for lung oxidative injuries.
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Affiliation(s)
- Mahin Dianat
- Department of Physiology, Physiology Research Center, Faculty of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Maryam Radan
- Department of Physiology, Physiology Research Center, Faculty of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Mohammad Badavi
- Department of Physiology, Physiology Research Center, Faculty of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Seyyed Ali Mard
- Department of Physiology, Physiology Research Center, Faculty of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Vahid Bayati
- Cellular and Molecular Research Center, Faculty of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Masoumeh Ahmadizadeh
- Physiology Research Center, School of Health, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, IR Iran
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13
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Oh CM, Oh IH, Choe BK, Yoon TY, Choi JM, Hwang J. Consuming Green Tea at Least Twice Each Day Is Associated with Reduced Odds of Chronic Obstructive Lung Disease in Middle-Aged and Older Korean Adults. J Nutr 2018; 148:70-76. [PMID: 29378037 DOI: 10.1093/jn/nxx016] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2017] [Accepted: 10/19/2017] [Indexed: 01/24/2023] Open
Abstract
Background The frequent consumption of green tea has been shown to have antioxidant and anti-inflammatory effects and to reduce the risk of lung cancer and type 2 diabetes. However, few studies have investigated the relation between green tea consumption and the risk of chronic obstructive lung disease (COPD). Objective This study aimed to examine the association between green tea intake and COPD with the use of a nationwide representative database. Methods This study was designed as a cross-sectional survey with the use of data from the Korean National Health and Nutritional Examination Survey collected between 2008 and 2015. Of these participants, 13,570 participants aged ≥40 y were included in the study population. COPD was defined as forced expiratory volume in 1 s (FEV1) divided by forced vital capacity (FVC) <0.70. Multiple linear and logistic regression models were used to examine the association between the frequency of green tea intake and risk of COPD after adjusting for age, sex, body mass index, smoking status, alcohol consumption, physical activity, and socioeconomic status. Results The incidence of COPD decreased from 14.1% to 5.9% with increased frequency of green tea intake from never to ≥2 times/d (P < 0.001). In the fully adjusted multiple linear regression model, the frequency of green tea intake showed a linear dose-response relation with FEV1/FVC (P-trend = 0.031). In the multiple logistic regression model, the OR for COPD among people who consumed green tea ≥2 times/d was 0.62 (95% CI: 0.40, 0.97), compared with those who never drank green tea, after adjusting for all covariates. Conclusion This study suggests that the consumption of green tea ≥2 times/d is associated with a reduced risk of COPD in Korean populations.
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Affiliation(s)
- Chang-Mo Oh
- Department of Preventive Medicine, School of Medicine, Kyung Hee University, Seoul, South Korea
| | - In-Hwan Oh
- Department of Preventive Medicine, School of Medicine, Kyung Hee University, Seoul, South Korea
| | - Bong-Keun Choe
- Department of Preventive Medicine, School of Medicine, Kyung Hee University, Seoul, South Korea
| | - Tai-Young Yoon
- Department of Preventive Medicine, School of Medicine, Kyung Hee University, Seoul, South Korea
| | - Joong-Myung Choi
- Department of Preventive Medicine, School of Medicine, Kyung Hee University, Seoul, South Korea
| | - Jihyen Hwang
- Department of Preventive Medicine, School of Medicine, Kyung Hee University, Seoul, South Korea
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14
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Liang Y, Liu KWK, Yeung SC, Li X, Ip MSM, Mak JCW. (-)-Epigallocatechin-3-gallate Reduces Cigarette Smoke-Induced Airway Neutrophilic Inflammation and Mucin Hypersecretion in Rats. Front Pharmacol 2017; 8:618. [PMID: 28932196 PMCID: PMC5592236 DOI: 10.3389/fphar.2017.00618] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2017] [Accepted: 08/24/2017] [Indexed: 12/20/2022] Open
Abstract
Background: Cigarette smoking is the leading cause of chronic obstructive pulmonary disease. (-)-Epigallocatechin-3-gallate (EGCG), the major catechins in Chinese green tea, has been studied for its anti-oxidative and anti-inflammatory properties in cell and animal models. In this study, we aimed to analyze the effects of EGCG on cigarette smoke (CS)-induced airway inflammation and mucus secretion in the CS-exposed rat model. Methods: Male Sprague-Dawley rats were randomly divided into either sham air (SA) or CS exposure. EGCG (50 mg/kg b.wt.) was given by oral gavage every other day in both SA and CS-exposed animals. Oxidative stress and inflammatory markers were determined in serum and/or bronchoalveolar lavage fluid by biochemical assays or ELISA. Lung morphological changes were examined by Periodic Acid-Schiff, Masson's Trichrome staining and immunohistochemical analysis. Western blot analysis was performed to explore the effects of EGCG on epidermal growth factor receptor (EGFR)-mediated signaling pathway. Results: (-)-Epigallocatechin-3-gallate treatment attenuated CS-induced oxidative stress, lung cytokine-induced neutrophil chemoattractant-1 release and neutrophil recruitment. CS exposure caused an increase in the number of goblet cells in line with MUC5AC upregulation, and increased lung collagen deposition, which were alleviated in the presence of EGCG. In addition, CS-induced phosphorylation of EGFR in rat lung was abrogated by EGCG treatment. Conclusion: (-)-Epigallocatechin-3-gallate treatment ameliorated CS-induced oxidative stress and neutrophilic inflammation, as well as airway mucus production and collagen deposition in rats. The present findings suggest that EGCG has a therapeutic effect on chronic airway inflammation and abnormal airway mucus production probably via inhibition of EGFR signaling pathway.
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Affiliation(s)
- Yingmin Liang
- Department of Medicine, The University of Hong KongPokfulam, Hong Kong.,Research Centre of Heart, Brain, Hormone and Healthy Aging, The University of Hong KongPokfulam, Hong Kong.,Shenzhen Institute of Research and Innovation, The University of Hong KongPokfulam, Hong Kong
| | - Kenneth W K Liu
- Department of Medicine, The University of Hong KongPokfulam, Hong Kong.,Research Centre of Heart, Brain, Hormone and Healthy Aging, The University of Hong KongPokfulam, Hong Kong
| | - Sze C Yeung
- Department of Medicine, The University of Hong KongPokfulam, Hong Kong.,Shenzhen Institute of Research and Innovation, The University of Hong KongPokfulam, Hong Kong
| | - Xiang Li
- Department of Medicine, The University of Hong KongPokfulam, Hong Kong.,Shenzhen Institute of Research and Innovation, The University of Hong KongPokfulam, Hong Kong
| | - Mary S M Ip
- Department of Medicine, The University of Hong KongPokfulam, Hong Kong.,Research Centre of Heart, Brain, Hormone and Healthy Aging, The University of Hong KongPokfulam, Hong Kong.,Shenzhen Institute of Research and Innovation, The University of Hong KongPokfulam, Hong Kong
| | - Judith C W Mak
- Department of Medicine, The University of Hong KongPokfulam, Hong Kong.,Research Centre of Heart, Brain, Hormone and Healthy Aging, The University of Hong KongPokfulam, Hong Kong.,Shenzhen Institute of Research and Innovation, The University of Hong KongPokfulam, Hong Kong.,Department of Pharmacology and Pharmacy, The University of Hong KongPokfulam, Hong Kong
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15
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Liang Y, Li X, Zhang Y, Yeung SC, Zhen Z, Ip MSM, Tse HF, Lian Q, Mak JCW. Induced Pluripotent Stem Cells-Derived Mesenchymal Stem Cells Attenuate Cigarette Smoke-Induced Cardiac Remodeling and Dysfunction. Front Pharmacol 2017; 8:501. [PMID: 28804458 PMCID: PMC5532447 DOI: 10.3389/fphar.2017.00501] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2017] [Accepted: 07/14/2017] [Indexed: 12/11/2022] Open
Abstract
The strong relationship between cigarette smoking and cardiovascular disease (CVD) has been well-documented, but the mechanisms by which smoking increases CVD risk appear to be multifactorial and incompletely understood. Mesenchymal stem cells (MSCs) are regarded as an important candidate for cell-based therapy in CVD. We hypothesized that MSCs derived from induced pluripotent stem cell (iPSC-MSCs) or bone marrow (BM-MSCs) might alleviate cigarette smoke (CS)-induced cardiac injury. This study aimed to investigate the effects of BM-MSCs or iPSC-MSCs on CS-induced changes in serum and cardiac lipid profiles, oxidative stress and inflammation as well as cardiac function in a rat model of passive smoking. Male Sprague-Dawley rats were randomly selected for exposure to either sham air (SA) as control or 4% CS for 1 h per day for 56 days. On day 29 and 43, human adult BM-MSCs, iPSC-MSCs or PBS were administered intravenously to CS-exposed rats. Results from echocardiography, serum and cardiac lipid profiles, cardiac antioxidant capacity, cardiac pro- and anti-inflammatory cytokines and cardiac morphological changes were evaluated at the end of treatment. iPSC-MSC-treated group showed a greater effect in the improvement of CS-induced cardiac dysfunction over BM-MSCs-treated group as shown by increased percentage left ventricular ejection fraction and percentage fractional shortening, in line with the greater reversal of cardiac lipid abnormality. In addition, iPSC-MSCs administration attenuated CS-induced elevation of cardiac pro-inflammatory cytokines as well as restoration of anti-inflammatory cytokines and anti-oxidative markers, leading to ameliorate cardiac morphological abnormalities. These data suggest that iPSC-MSCs on one hand may restore CS-induced cardiac lipid abnormality and on the other hand may attenuate cardiac oxidative stress and inflammation via inhibition of CS-induced NF-κB activation, leading to improvement of cardiac remodeling and dysfunction. Thus, iPSC-MSCs may be a promising candidate in cell-based therapy to prevent cardiac complications in smokers.
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Affiliation(s)
- Yingmin Liang
- Department of Medicine, The University of Hong KongPok Fu Lam, Hong Kong.,Shenzhen Institute of Research and Innovation, The University of Hong KongPok Fu Lam, Hong Kong
| | - Xiang Li
- Department of Medicine, The University of Hong KongPok Fu Lam, Hong Kong.,Shenzhen Institute of Research and Innovation, The University of Hong KongPok Fu Lam, Hong Kong
| | - Yuelin Zhang
- Department of Medicine, The University of Hong KongPok Fu Lam, Hong Kong
| | - Sze Chun Yeung
- Department of Medicine, The University of Hong KongPok Fu Lam, Hong Kong.,Shenzhen Institute of Research and Innovation, The University of Hong KongPok Fu Lam, Hong Kong
| | - Zhe Zhen
- Department of Medicine, The University of Hong KongPok Fu Lam, Hong Kong
| | - Mary S M Ip
- Department of Medicine, The University of Hong KongPok Fu Lam, Hong Kong.,Shenzhen Institute of Research and Innovation, The University of Hong KongPok Fu Lam, Hong Kong.,Research Centre of Heart, Brain, Hormone and Healthy Aging, The University of Hong KongPok Fu Lam, Hong Kong
| | - Hung Fat Tse
- Department of Medicine, The University of Hong KongPok Fu Lam, Hong Kong
| | - Qizhou Lian
- Department of Medicine, The University of Hong KongPok Fu Lam, Hong Kong.,Shenzhen Institute of Research and Innovation, The University of Hong KongPok Fu Lam, Hong Kong.,Research Centre of Heart, Brain, Hormone and Healthy Aging, The University of Hong KongPok Fu Lam, Hong Kong.,Department of Ophthalmology, The University of Hong KongPok Fu Lam, Hong Kong
| | - Judith C W Mak
- Department of Medicine, The University of Hong KongPok Fu Lam, Hong Kong.,Shenzhen Institute of Research and Innovation, The University of Hong KongPok Fu Lam, Hong Kong.,Research Centre of Heart, Brain, Hormone and Healthy Aging, The University of Hong KongPok Fu Lam, Hong Kong.,Department of Pharmacology and Pharmacy, The University of Hong KongPok Fu Lam, Hong Kong
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16
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Azimi S, Mansouri Z, Bakhtiari S, Tennant M, Kruger E, Rajabibazl M, Daraei A. Does green tea consumption improve the salivary antioxidant status of smokers? Arch Oral Biol 2017; 78:1-5. [DOI: 10.1016/j.archoralbio.2017.02.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2016] [Revised: 02/01/2017] [Accepted: 02/03/2017] [Indexed: 10/20/2022]
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17
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Li X, Zhang Y, Liang Y, Cui Y, Yeung SC, Ip MSM, Tse HF, Lian Q, Mak JCW. iPSC-derived mesenchymal stem cells exert SCF-dependent recovery of cigarette smoke-induced apoptosis/proliferation imbalance in airway cells. J Cell Mol Med 2016; 21:265-277. [PMID: 27641240 PMCID: PMC5264148 DOI: 10.1111/jcmm.12962] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2016] [Accepted: 07/29/2016] [Indexed: 01/08/2023] Open
Abstract
Mesenchymal stem cells (MSCs) have emerged as a potential cell‐based therapy for pulmonary emphysema in animal models. Our previous study demonstrated that human induced pluripotent stem cell–derived MSCs (iPSC‐MSCs) were superior over bone marrow–derived MSCs (BM‐MSCs) in attenuating cigarette smoke (CS)‐induced airspace enlargement possibly through mitochondrial transfer. This study further investigated the effects of iPSC‐MSCs on inflammation, apoptosis, and proliferation in a CS‐exposed rat model and examined the effects of the secreted paracrine factor from MSCs as another possible mechanism in an in vitro model of bronchial epithelial cells. Rats were exposed to 4% CS for 1 hr daily for 56 days. At days 29 and 43, human iPSC‐MSCs or BM‐MSCs were administered intravenously. We observed significant attenuation of CS‐induced elevation of circulating 8‐isoprostane and cytokine‐induced neutrophil chemoattractant‐1 after iPSC‐MSC treatment. In line, a superior capacity of iPSC‐MSCs was also observed in ameliorating CS‐induced infiltration of macrophages and neutrophils and apoptosis/proliferation imbalance in lung sections over BM‐MSCs. In support, the conditioned medium (CdM) from iPSC‐MSCs ameliorated CS medium‐induced apoptosis/proliferation imbalance of bronchial epithelial cells in vitro. Conditioned medium from iPSC‐MSCs contained higher level of stem cell factor (SCF) than that from BM‐MSCs. Deprivation of SCF from iPSC‐MSC‐derived CdM led to a reduction in anti‐apoptotic and pro‐proliferative capacity. Taken together, our data suggest that iPSC‐MSCs may possess anti‐apoptotic/pro‐proliferative capacity in the in vivo and in vitro models of CS‐induced airway cell injury partly through paracrine secretion of SCF.
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Affiliation(s)
- Xiang Li
- Department of Medicine, The University of Hong Kong, Hong Kong
| | - Yuelin Zhang
- Department of Medicine, The University of Hong Kong, Hong Kong.,Department of Ophthalmology, The University of Hong Kong, Hong Kong
| | - Yingmin Liang
- Department of Medicine, The University of Hong Kong, Hong Kong
| | - Yuting Cui
- Department of Medicine, The University of Hong Kong, Hong Kong
| | - Sze C Yeung
- Department of Medicine, The University of Hong Kong, Hong Kong
| | - Mary S M Ip
- Department of Medicine, The University of Hong Kong, Hong Kong.,Research Centre of Heart, Brain, Hormone and Healthy Aging, The University of Hong Kong, Hong Kong
| | - Hung-Fat Tse
- Department of Medicine, The University of Hong Kong, Hong Kong
| | - Qizhou Lian
- Department of Medicine, The University of Hong Kong, Hong Kong.,Department of Ophthalmology, The University of Hong Kong, Hong Kong.,Research Centre of Heart, Brain, Hormone and Healthy Aging, The University of Hong Kong, Hong Kong.,Shenzhen Institute of Research and Innovation, The University of Hong Kong, Hong Kong
| | - Judith C W Mak
- Department of Medicine, The University of Hong Kong, Hong Kong.,Research Centre of Heart, Brain, Hormone and Healthy Aging, The University of Hong Kong, Hong Kong.,Shenzhen Institute of Research and Innovation, The University of Hong Kong, Hong Kong.,Department of Pharmacology & Pharmacy, The University of Hong Kong, Hong Kong
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18
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Therapeutic properties of green tea against environmental insults. J Nutr Biochem 2016; 40:1-13. [PMID: 27723473 DOI: 10.1016/j.jnutbio.2016.05.005] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2016] [Revised: 05/04/2016] [Accepted: 05/06/2016] [Indexed: 12/23/2022]
Abstract
Pesticides, smoke, mycotoxins, polychlorinated biphenyls (PCBs), and arsenic are the most common environmental toxins and toxicants to humans. These toxins and toxicants may impact on human health at the molecular (DNA, RNA, or protein), organelle (mitochondria, lysosome, or membranes), cellular (growth inhibition or cell death), tissue, organ, and systemic levels. Formation of reactive radicals, lipid peroxidation, inflammation, genotoxicity, hepatotoxicity, embryotoxicity, neurological alterations, apoptosis, and carcinogenic events are some of the mechanisms mediating the toxic effects of the environmental toxins and toxicants. Green tea, the nonoxidized and nonfermented form of tea that contains several polyphenols, including green tea catechins, exhibits protective effects against these environmental toxins and toxicants in preclinical studies and to a much-limited extent, in clinical trials. The protective effects are collectively mediated by antioxidant, antiinflammatory, antimutagenic, hepatoprotective and neuroprotective, and anticarcinogenic activities. In addition, green tea modulates signaling pathway including NF-κB and ERK pathways, preserves mitochondrial membrane potential, inhibits caspase-3 activity, down-regulates proapoptotic proteins, and induces the phase II detoxifying pathway. The bioavailability and metabolism of green tea and its protective effects against environmental insults induced by pesticides, smoke, mycotoxins, PCBs, and arsenic are reviewed in this paper. Future studies with emphasis on clinical trials should identify biomarkers of green tea intake, examine the mechanisms of action of green tea polyphenols, and investigate potential interactions of green tea with other toxicant-modulating dietary factors.
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19
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Determination of the oxidative stress biomarker urinary 8-hydroxy-2⿲-deoxyguanosine by automated on-line in-tube solid-phase microextraction coupled with liquid chromatographytandem mass spectrometry. J Chromatogr B Analyt Technol Biomed Life Sci 2016; 1019:140-6. [DOI: 10.1016/j.jchromb.2015.08.028] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2015] [Revised: 08/18/2015] [Accepted: 08/20/2015] [Indexed: 11/18/2022]
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Analysis of urinary 8-isoprostane as an oxidative stress biomarker by stable isotope dilution using automated online in-tube solid-phase microextraction coupled with liquid chromatography–tandem mass spectrometry. J Pharm Biomed Anal 2015; 112:36-42. [DOI: 10.1016/j.jpba.2015.04.020] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2015] [Revised: 04/13/2015] [Accepted: 04/16/2015] [Indexed: 11/18/2022]
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Inhibitory effects of Cnidium monnieri fruit extract on pulmonary inflammation in mice induced by cigarette smoke condensate and lipopolysaccharide. Chin J Nat Med 2015; 12:641-7. [PMID: 25263974 DOI: 10.1016/s1875-5364(14)60098-4] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2013] [Indexed: 01/13/2023]
Abstract
The aim of this study was to investigate the inhibitory effect of Cnidium monnieri fruit (CM) extracts on pulmonary inflammation induced in mice by cigarette smoke condensate (CSC) and lipopolysaccharide (LPS). Pulmonary inflammation was induced by intratracheal instillation of LPS and CSC five times within 12 days. CM extract was administered orally at a dose of 50 or 200 mg·kg(-1). The number of inflammatory cells in the bronchoalveolar lavage fluid was counted using a fluorescence activated cell sorter. Inflammatory mediator levels were determined by enzyme-linked immunosorbent assay. The administration of LPS and CSC exacerbated airway hyper-responsiveness (AHR) and induced an accumulation of inflammatory cells and mediators, and led to histological changes. However, these responses are modulated by treatment with CM, and the treatment with CM extract produces similar or more extensive results than the treatment with cyclosporin A (CSA). CM extract may have an inhibitory effect on pulmonary inflammation related with chronic obstructive pulmonary disease.
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Schamberger AC, Mise N, Meiners S, Eickelberg O. Epigenetic mechanisms in COPD: implications for pathogenesis and drug discovery. Expert Opin Drug Discov 2015; 9:609-28. [PMID: 24850530 DOI: 10.1517/17460441.2014.913020] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
INTRODUCTION Chronic obstructive pulmonary disease (COPD) is the fourth leading cause of death worldwide. The growing burden of COPD is due to continuous tobacco use, which is the most important risk factor of the disease, indoor fumes, occupational exposures and also aging of the world's population. Epigenetic mechanisms significantly contribute to COPD pathophysiology. AREAS COVERED This review focuses on disease-relevant changes in DNA modification, histone modification and non-coding RNA expression in COPD, and provides insight into novel therapeutic approaches modulating epigenetic mechanisms. Recent findings revealed, among others, globally changed DNA methylation patterns, decreased levels of histone deacetylases and reduced microRNAs levels in COPD. The authors also discuss a potential role of the chromatin silencing Polycomb group of proteins in COPD. EXPERT OPINION COPD is a highly complex disease and therapy development is complicated by the fact that many smokers develop both COPD and lung cancer. Of interest, combination therapies involving DNA methyltransferase inhibitors and anti-inflammatory drugs provide a promising approach, as they might be therapeutic for both COPD and cancer. Although the field of epigenetic research has virtually exploded over the last 10 years, particular efforts are required to enhance our knowledge of the COPD epigenome in order to successfully establish epigenetic-based therapies for this widespread disease.
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Affiliation(s)
- Andrea C Schamberger
- Comprehensive Pneumology Center, Institute of Lung Biology and Disease, Helmholtz Zentrum München, University Hospital and Ludwig-Maximilians-University, Member of the German Center for Lung Research (DZL) , Max-Lebsche-Platz 31, 81377 Munich , Germany
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Li X, Zhang Y, Yeung SC, Liang Y, Liang X, Ding Y, Ip MSM, Tse HF, Mak JCW, Lian Q. Mitochondrial transfer of induced pluripotent stem cell-derived mesenchymal stem cells to airway epithelial cells attenuates cigarette smoke-induced damage. Am J Respir Cell Mol Biol 2014; 51:455-65. [PMID: 24738760 DOI: 10.1165/rcmb.2013-0529oc] [Citation(s) in RCA: 212] [Impact Index Per Article: 21.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
Transplantation of mesenchymal stem cells (MSCs) holds great promise in the repair of cigarette smoke (CS)-induced lung damage in chronic obstructive pulmonary disease (COPD). Because CS leads to mitochondrial dysfunction, we aimed to investigate the potential benefit of mitochondrial transfer from human-induced pluripotent stem cell-derived MSCs (iPSC-MSCs) to CS-exposed airway epithelial cells in vitro and in vivo. Rats were exposed to 4% CS for 1 hour daily for 56 days. At Days 29 and, human iPSC-MSCs or adult bone marrow-derived MSCs (BM-MSCs) were administered intravenously to CS-exposed rats. CS-exposed rats exhibited severe alveolar destruction with a higher mean linear intercept (Lm) than sham air-exposed rats (P < 0.001) that was attenuated in the presence of iPSC-MSCs or BM-MSCs (P < 0.01). The attenuation of Lm value and the severity of fibrosis was greater in the iPSC-MSC-treated group than in the BM-MSC-treated group (P < 0.05). This might have contributed to the novel observation of mitochondrial transfer from MSCs to rat airway epithelial cells in lung sections exposed to CS. In vitro studies further revealed that transfer of mitochondria from iPSC-MSCs to bronchial epithelial cells (BEAS-2B) was more effective than from BM-MSCs, with preservation of adenosine triphosphate contents. This distinct mitochondrial transfer occurred via the formation of tunneling nanotubes. Inhibition of tunneling nanotube formation blocked mitochondrial transfer. Our findings indicate a higher mitochondrial transfer capacity of iPSC-MSCs than BM-MSCs to rescue CS-induced mitochondrial damage. iPSC-MSCs may thus hold promise for the development of cell therapy in COPD.
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Han Y, Ling MT, Mao H, Zheng J, Liu M, Lam KT, Liu Y, Tu W, Lau YL. Influenza virus-induced lung inflammation was modulated by cigarette smoke exposure in mice. PLoS One 2014; 9:e86166. [PMID: 24465940 PMCID: PMC3897646 DOI: 10.1371/journal.pone.0086166] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2013] [Accepted: 12/06/2013] [Indexed: 01/24/2023] Open
Abstract
Although smokers have increased susceptibility and severity of seasonal influenza virus infection, there is no report about the risk of 2009 pandemic H1N1 (pdmH1N1) or avian H9N2 (H9N2/G1) virus infection in smokers. In our study, we used mouse model to investigate the effect of cigarette smoke on pdmH1N1 or H9N2 virus infection. Mice were exposed to cigarette smoke for 21 days and then infected with pdmH1N1 or H9N2 virus. Control mice were exposed to air in parallel. We found that cigarette smoke exposure alone significantly upregulated the lung inflammation. Such prior cigarette smoke exposure significantly reduced the disease severity of subsequent pdmH1N1 or H9N2 virus infection. For pdmH1N1 infection, cigarette smoke exposed mice had significantly lower mortality than the control mice, possibly due to the significantly decreased production of inflammatory cytokines and chemokines. Similarly, after H9N2 infection, cigarette smoke exposed mice displayed significantly less weight loss, which might be attributed to lower cytokines and chemokines production, less macrophages, neutrophils, CD4+ and CD8+ T cells infiltration and reduced lung damage compared to the control mice. To further investigate the underlying mechanism, we used nicotine to mimic the effect of cigarette smoke both in vitro and in vivo. Pre-treating the primary human macrophages with nicotine for 72 h significantly decreased their expression of cytokines and chemokines after pdmH1N1 or H9N2 infection. The mice subcutaneously and continuously treated with nicotine displayed significantly less weight loss and lower inflammatory response than the control mice upon pdmH1N1 or H9N2 infection. Moreover, α7 nicotinic acetylcholine receptor knockout mice had more body weight loss than wild-type mice after cigarette smoke exposure and H9N2 infection. Our study provided the first evidence that the pathogenicity of both pdmH1N1 and H9N2 viruses was alleviated in cigarette smoke exposed mice, which might partially be attributed to the immunosuppressive effect of nicotine.
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Affiliation(s)
- Yan Han
- Department of Paediatrics and Adolescent Medicine, Li Ka Shing Faculty of Medicine, University of Hong Kong, Hong Kong Special Administrative Region, People's Republic of China
| | - Man To Ling
- Department of Paediatrics and Adolescent Medicine, Li Ka Shing Faculty of Medicine, University of Hong Kong, Hong Kong Special Administrative Region, People's Republic of China
| | - Huawei Mao
- Department of Paediatrics and Adolescent Medicine, Li Ka Shing Faculty of Medicine, University of Hong Kong, Hong Kong Special Administrative Region, People's Republic of China
| | - Jian Zheng
- Department of Paediatrics and Adolescent Medicine, Li Ka Shing Faculty of Medicine, University of Hong Kong, Hong Kong Special Administrative Region, People's Republic of China
| | - Ming Liu
- State Key Laboratory of Respiratory Diseases, Guangzhou Institute of Respiratory Diseases, First Affiliated Hospital, Guangzhou Medical College, Guangzhou, People's Republic of China
| | - Kwok Tai Lam
- Department of Paediatrics and Adolescent Medicine, Li Ka Shing Faculty of Medicine, University of Hong Kong, Hong Kong Special Administrative Region, People's Republic of China
| | - Yuan Liu
- Department of Paediatrics and Adolescent Medicine, Li Ka Shing Faculty of Medicine, University of Hong Kong, Hong Kong Special Administrative Region, People's Republic of China
| | - Wenwei Tu
- Department of Paediatrics and Adolescent Medicine, Li Ka Shing Faculty of Medicine, University of Hong Kong, Hong Kong Special Administrative Region, People's Republic of China
- * E-mail: (Y. Lau); (WT)
| | - Yu-Lung Lau
- Department of Paediatrics and Adolescent Medicine, Li Ka Shing Faculty of Medicine, University of Hong Kong, Hong Kong Special Administrative Region, People's Republic of China
- * E-mail: (Y. Lau); (WT)
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25
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Guan SP, Tee W, Ng DSW, Chan TK, Peh HY, Ho WE, Cheng C, Mak JC, Wong WSF. Andrographolide protects against cigarette smoke-induced oxidative lung injury via augmentation of Nrf2 activity. Br J Pharmacol 2013; 168:1707-18. [PMID: 23146110 PMCID: PMC3605877 DOI: 10.1111/bph.12054] [Citation(s) in RCA: 99] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2012] [Revised: 10/30/2012] [Accepted: 11/01/2012] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND AND PURPOSE Cigarette smoke is a major cause for chronic obstructive pulmonary disease (COPD). Andrographolide is an active biomolecule isolated from the plant Andrographis paniculata. Andrographolide has been shown to activate nuclear factor erythroid-2-related factor 2 (Nrf2), a redox-sensitive antioxidant transcription factor. As Nrf2 activity is reduced in COPD, we hypothesize that andrographolide may have therapeutic value for COPD. EXPERIMENTAL APPROACH Andrographolide was given i.p. to BALB/c mice daily 2h before 4% cigarette smoke exposure for 1h over five consecutive days. Bronchoalveolar lavage fluid and lungs were collected for analyses of cytokines, oxidative damage markers and antioxidant activities. BEAS-2B bronchial epithelial cells were exposed to cigarette smoke extract (CSE) and used to study the antioxidant mechanism of action of andrographolide. KEY RESULTS Andrographolide suppressed cigarette smoke-induced increases in lavage fluid cell counts; levels of IL-1β, MCP-1, IP-10 and KC; and levels of oxidative biomarkers 8-isoprostane, 8-OHdG and 3-nitrotyrosine in a dose-dependent manner. Andrographolide promoted inductions of glutathione peroxidase (GPx) and glutathione reductase (GR) activities in lungs from cigarette smoke-exposed mice. In BEAS-2B cells, andrographolide markedly increased nuclear Nrf2 accumulation, promoted binding to antioxidant response element (ARE) and total cellular glutathione level in response to CSE. Andrographolide up-regulated ARE-regulated gene targets including glutamate-cysteine ligase catalytic (GCLC) subunit, GCL modifier (GCLM) subunit, GPx, GR and heme oxygenase-1 in BEAS-2B cells in response to CSE. CONCLUSIONS Andrographolide possesses antioxidative properties against cigarette smoke-induced lung injury probably via augmentation of Nrf2 activity and may have therapeutic potential for treating COPD.
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Affiliation(s)
- S P Guan
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University Health System, Singapore
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Mak JCW. Potential role of green tea catechins in various disease therapies: progress and promise. Clin Exp Pharmacol Physiol 2012; 39:265-73. [PMID: 22229384 DOI: 10.1111/j.1440-1681.2012.05673.x] [Citation(s) in RCA: 99] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Green tea (from the plant Camellia sinensis), a beverage whose consumption started 5000 years ago in China, has important biological and pharmacological properties. The beneficial effects of green tea have been attributed to the presence of phenolic compounds that are powerful anti-oxidants and free iron scavengers. Of all the catechins found in green tea, namely (-)-epicatechin-3-gallate, (-)-epigallocatechin, (-)-epicatechin and (-)-epigallocatechin-3-gallate (EGCG), EGCG is the most abundant and powerful. It is widely believed that green tea may protect against death from all causes, especially cardiovascular diseases (coronary heart disease and stroke) owing to the presence of catechins associated with green tea consumption. Other health benefits include various types of cancer chemoprevention, weight loss and protective effects against neurodegenerative diseases (Alzheimer's disease and Parkinson's disease). Thus far, numerous pharmacological activities regulating disease-specific molecular targets have been reported in vitro for EGCG concentrations in the micromolar range, which are physiologically irrelevant. Although most of the studies have shown benefits with two to three cups of green tea per day, the optimal dose has not yet been established to enable any solid conclusions to be drawn regarding the various health benefits of green tea or its constituents in humans. With Phase I trials providing information on the safety profile and pharmacokinetics of EGCG, the window of opportunity is wider to undertake well-controlled long-term human studies to enable a full understanding of the protective effects of green tea catechins on various parameters in different settings.
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Affiliation(s)
- Judith C W Mak
- Departments of Medicine and Pharmacology and Pharmacy, The University of Hong Kong, Hong Kong, China.
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Lau WKW, Li X, Yeung DSC, Chan KH, Ip MSM, Mak JCW. The involvement of serotonin metabolism in cigarette smoke-induced oxidative stress in rat lung in vivo. Free Radic Res 2012; 46:1413-9. [PMID: 22900927 DOI: 10.3109/10715762.2012.721928] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Recently, we have reported the dysregulation of circulating serotonin (5-hydroxytryptamine, 5-HT) homeostasis in patients with chronic obstructive pulmonary disease (COPD). An increase in metabolism of 5-HT has been reported to induce oxidative stress via monoamine oxidase (MAO)-dependent pathway. The present study aimed at investigating the effect of cigarette smoke exposure on the systemic circulation and local airway 5-HT levels as well as MAO-mediated oxidative pathway using a cigarette smoke-exposed rat model. Male Sprague-Dawley rats (150-200 g) were exposed to either sham air or 4% (v/v, smoke/air) cigarette smoke for 1 hour daily for 56 consecutive days. Sera, bronchoalveolar larvage (BAL) and lung tissues were collected 24 hours after the last exposure. We found a significant reduction in the reduced glutathione (rGSH) and an elevation in advanced oxidation protein products (AOPP), a protein oxidation marker, in the lung of cigarette smoke-exposed group (p < 0.05). A significant increase in 5-HT was found in serum (p < 0.05), but not in the BAL or lung, after cigarette smoke exposure. MAO-A activity was significantly elevated in the lung of cigarette smoke-exposed group (p < 0.05). Furthermore, increased superoxide anion levels were found in lung homogenates of cigarette smoke-exposed rats after incubation with 5-HT (p < 0.05), which was positively associated with the increase in MAO-A activity (r = 0.639, p < 0.05). Our findings supported the presence of GSH disruption and protein oxidation in the lung after cigarette smoke exposure. The metabolism of 5-HT by MAO-A in the lung enhanced cigarette smoke-induced superoxides, which might contribute to the pathogenesis of COPD.
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Affiliation(s)
- Way Kwok-Wai Lau
- Departments of Medicine, The University of Hong Kong, Hong Kong SAR, People's Republic of China
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Lau WKW, Mak JCW, Chan KH, Law ACK. Cigarette smoke-induced cerebral cortical interleukin-6 elevation is not mediated through oxidative stress. Neurotox Res 2012; 22:170-6. [PMID: 22194160 PMCID: PMC3368107 DOI: 10.1007/s12640-011-9301-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2011] [Revised: 11/09/2011] [Accepted: 12/08/2011] [Indexed: 01/01/2023]
Abstract
The author group has previously established an in vivo subchronic cigarette smoke (CS) exposure rat model, in which the systemic oxidative burden as well as the modulation of local anti-oxidative enzymes in the lung has been demonstrated. Oxidative stress has been shown to induce pro-inflammatory cytokine release, including interleukin (IL)-6 in the airways. In this study, we aimed to investigate the changes in IL-6 production, as well as the oxidative/anti-oxidative responses in the cerebral cortex using the same in vivo model. IL-6 was determined by RT-PCR and western-blot analysis. Local oxidative and anti-oxidative responses were determined by measuring cerebral cortical malondialdehyde (MDA) and advanced oxidation protein product (AOPP) levels, superoxide dismutase (SOD) and catalase activities, and the reduced to oxidized glutathione (GSH/GSSG) ratio. Nitrite level was measured by fluorescent spectrophotometry. Our results demonstrated a significant increase in both IL-6 mRNA and protein levels. Reductions of SOD activity and manganese (Mn)SOD protein level were observed together with the increased level of superoxide measured by chemiluminescent signal, after 56 days of CS exposure. There were no significant changes in the cerebral cortical levels of MDA, AOPP, catalase activity, and the GSH/GSSG ratio. Nitrite level was significantly reduced, together with the decreased protein level of nNOS in the cerebral cortex, after 56 days of CS exposure. Our results suggest that exposure to CS induces IL-6 expression in the cerebral cortex, which is not mediated by the oxidative/anti-oxidative imbalance.
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Affiliation(s)
- Way Kwok-Wai Lau
- Division of Respiratory Medicine, Department of Medicine, The University of Hong Kong, Hong Kong SAR, China
| | - Judith Choi-Wo Mak
- Division of Respiratory Medicine, Department of Medicine, The University of Hong Kong, Hong Kong SAR, China
- Department of Pharmacology and Pharmacy, The University of Hong Kong, Hong Kong SAR, China
| | - Ka-Ho Chan
- School of Chinese Medicine and Health Care, Tung Wah Group of Hospitals Community College, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Andrew Chi-Kin Law
- Neurodysfunction Research Laboratory, Department of Psychiatry, The University of Hong Kong, Room 219, Block J, 2nd Floor, Queen Mary Hospital, 102 Pok Fu Lam Road, Hong Kong SAR, China
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Chan KH, Chan SCH, Yeung SC, Man RYK, Ip MSM, Mak JCW. Inhibitory effect of Chinese green tea on cigarette smoke-induced up-regulation of airway neutrophil elastase and matrix metalloproteinase-12 via antioxidant activity. Free Radic Res 2012; 46:1123-9. [DOI: 10.3109/10715762.2012.692786] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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30
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Cigarette smoking accelerated brain aging and induced pre-Alzheimer-like neuropathology in rats. PLoS One 2012; 7:e36752. [PMID: 22606286 PMCID: PMC3350465 DOI: 10.1371/journal.pone.0036752] [Citation(s) in RCA: 86] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2012] [Accepted: 04/12/2012] [Indexed: 12/21/2022] Open
Abstract
Cigarette smoking has been proposed as a major risk factor for aging-related pathological changes and Alzheimer's disease (AD). To date, little is known for how smoking can predispose our brains to dementia or cognitive impairment. This study aimed to investigate the cigarette smoke-induced pathological changes in brains. Male Sprague-Dawley (SD) rats were exposed to either sham air or 4% cigarette smoke 1 hour per day for 8 weeks in a ventilated smoking chamber to mimic the situation of chronic passive smoking. We found that the levels of oxidative stress were significantly increased in the hippocampus of the smoking group. Smoking also affected the synapse through reducing the expression of pre-synaptic proteins including synaptophysin and synapsin-1, while there were no changes in the expression of postsynaptic protein PSD95. Decreased levels of acetylated-tubulin and increased levels of phosphorylated-tau at 231, 205 and 404 epitopes were also observed in the hippocampus of the smoking rats. These results suggested that axonal transport machinery might be impaired, and the stability of cytoskeleton might be affected by smoking. Moreover, smoking affected amyloid precursor protein (APP) processing by increasing the production of sAPPβ and accumulation of β–amyloid peptide in the CA3 and dentate gyrus region. In summary, our data suggested that chronic cigarette smoking could induce synaptic changes and other neuropathological alterations. These changes might serve as evidence of early phases of neurodegeneration and may explain why smoking can predispose brains to AD and dementia.
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Fritz H, Seely D, Kennedy DA, Fernandes R, Cooley K, Fergusson D. Green Tea and Lung Cancer. Integr Cancer Ther 2012; 12:7-24. [DOI: 10.1177/1534735412442378] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Background: Green tea is a beverage widely used by lung cancer patients and the public for its purported anticancer properties. The authors conducted a systematic review of green tea for the treatment and prevention of lung cancer. Methodology: Six electronic databases were searched from inception until November 2011 for human interventional and preclinical evidence pertaining to the safety and efficacy of green tea for lung cancer. Results: A total of 84 articles met inclusion criteria: two Phase I trials, three reports of one surrogate study, and 79 preclinical studies. There is a lack of controlled trials investigating green tea for lung cancer. Two Phase I studies showed no objective tumor responses at the maximum tolerated dose, ranging from 3 to 4.2 g/m2 green tea extract (GTE) per day. Four cups of green tea daily decreased DNA damage (8OH-dG) in smokers. Human studies indicate that 800mg of green tea catechins daily does not alter activity of the CYP2D6, CYP1A2, CYP3A4 and CYP2C9 enzymes, however in vitro evidence suggests that green tea may bind to and reduce the effectiveness of bortezomib. Green tea applied topically may improve the healing time of radiation burns. Conclusions: Although some evidence suggests that chemopreventative benefits can be accrued from green tea, there is currently insufficient evidence to support green tea as a treatment or preventative agent for lung cancer. Green tea should not be used by patients on bortezomib therapy. Further research is warranted to explore this natural agent for lung cancer treatment and prevention.
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Affiliation(s)
- Heidi Fritz
- Canadian College of Naturopathic Medicine, Toronto, ON, Canada
| | - Dugald Seely
- Canadian College of Naturopathic Medicine, Toronto, ON, Canada
- Ottawa Hospital Research Institute, Ottawa, ON, Canada
- Ottawa Integrative Cancer Center, Ottawa, ON, Canada
| | - Deborah A. Kennedy
- Canadian College of Naturopathic Medicine, Toronto, ON, Canada
- The University of Toronto, Toronto, ON, Canada
| | - Rochelle Fernandes
- Canadian College of Naturopathic Medicine, Toronto, ON, Canada
- The University of Toronto, Toronto, ON, Canada
| | - Kieran Cooley
- Canadian College of Naturopathic Medicine, Toronto, ON, Canada
- The University of Toronto, Toronto, ON, Canada
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Lixuan Z, Jingcheng D, Wenqin Y, Jianhua H, Baojun L, Xiaotao F. Baicalin attenuates inflammation by inhibiting NF-kappaB activation in cigarette smoke induced inflammatory models. Pulm Pharmacol Ther 2010; 23:411-9. [PMID: 20566376 DOI: 10.1016/j.pupt.2010.05.004] [Citation(s) in RCA: 80] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/18/2009] [Revised: 04/30/2010] [Accepted: 05/07/2010] [Indexed: 12/29/2022]
Abstract
Nuclear factor kappa-light-chain-enhancer of activated B cells (NF-kappaB) is a key player in the inflammatory response. Baicalin is an extract from roots of the plant scutellaria baicalensis. Many studies show that baicalin has anti-inflammatory, anti-bacterial and antiviral activities. Here we investigated the influence of baicalin on COPD inflammation and the mechanism of anti-inflammatory effect in vivo and in vitro. In vivo, COPD rat model was established by cigarette smoke (CS) exposure. Thirty-six Sprague-Dawley (SD) rats were randomly assigned to six experimental groups: control, CS, dexamethasone (DXM), and baicalin (20 mg/kg, 40 mg/kg, 80 mg/kg). The lung pathology was observed and leukocytes in bronchoalveolar lavage fluid (BALF) were counted by Optical microscope. Pulmonary function was measured by using an animal plethysmograph. The production of cytokines was measured by ELISA and the expression levels of NF-kappaB p65 protein were detected by immunohistochemistry. The results in vivo show CS exposure significantly increased the expression of IL-8, IL-6 and TNF-alpha in plasma and BALF and enhanced NF-kappaB p65 expression in the lungs. Baicalin treatment markedly attenuated the inflammatory effects of CS. In vitro, cell model was established by using cigarette smoke extract (CSE) to stimulate type II pneumocytes. Type II pneumocytes were also divided into six groups: control, CSE, pyrrolidine dithiocarbamate (PDTC), and baicalin (5 mumol, 10 mumol, 20 mumol). Cytokines levels were measured by ELISA. Expression of IkappaB and p65 phosphorylation was detected by western blotting. NF-kappaB DNA-binding activity was detected by EMSA. The results show that CSE resulted in increasing IL-8, IL-6 and TNF-alpha expression and activation of NF-kappaB. The proinflammatory effects of CSE were inhibited by treatment of baicalin in a dose-dependent manner. It can be concluded that baicalin has significant anti-inflammatory effects on CS induced COPD rat models and CSE-induced cell models, and the effectiveness increases with increasing baicalin dosage. The anti-inflammatory effect is likely achieved by inhibiting the NF-kappaB pathway.
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Affiliation(s)
- Zeng Lixuan
- Department of Integrated TCM and Western Medicine, Huashan Hospital Affiliated Fudan University, Shanghai, China
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