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Alqarni AA, Aldhahir AM, Alghamdi SA, Alqahtani JS, Siraj RA, Alwafi H, AlGarni AA, Majrshi MS, Alshehri SM, Pang L. Role of prostanoids, nitric oxide and endothelin pathways in pulmonary hypertension due to COPD. Front Med (Lausanne) 2023; 10:1275684. [PMID: 37881627 PMCID: PMC10597708 DOI: 10.3389/fmed.2023.1275684] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Accepted: 09/19/2023] [Indexed: 10/27/2023] Open
Abstract
Pulmonary hypertension (PH) due to chronic obstructive pulmonary disease (COPD) is classified as Group 3 PH, with no current proven targeted therapies. Studies suggest that cigarette smoke, the most risk factor for COPD can cause vascular remodelling and eventually PH as a result of dysfunction and proliferation of pulmonary artery smooth muscle cells (PASMCs) and pulmonary artery endothelial cells (PAECs). In addition, hypoxia is a known driver of pulmonary vascular remodelling in COPD, and it is also thought that the presence of hypoxia in patients with COPD may further exaggerate cigarette smoke-induced vascular remodelling; however, the underlying cause is not fully understood. Three main pathways (prostanoids, nitric oxide and endothelin) are currently used as a therapeutic target for the treatment of patients with different groups of PH. However, drugs targeting these three pathways are not approved for patients with COPD-associated PH due to lack of evidence. Thus, this review aims to shed light on the role of impaired prostanoids, nitric oxide and endothelin pathways in cigarette smoke- and hypoxia-induced pulmonary vascular remodelling and also discusses the potential of using these pathways as therapeutic target for patients with PH secondary to COPD.
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Affiliation(s)
- Abdullah A. Alqarni
- Department of Respiratory Therapy, Faculty of Medical Rehabilitation Sciences, King Abdulaziz University, Jeddah, Saudi Arabia
- Respiratory Therapy Unit, King Abdulaziz University Hospital, Jeddah, Saudi Arabia
| | - Abdulelah M. Aldhahir
- Respiratory Therapy Department, Faculty of Applied Medical Sciences, Jazan University, Jazan, Saudi Arabia
| | - Sara A. Alghamdi
- Respiratory Care Department, Al Murjan Hospital, Jeddah, Saudi Arabia
| | - Jaber S. Alqahtani
- Department of Respiratory Care, Prince Sultan Military College of Health Sciences, Dammam, Saudi Arabia
| | - Rayan A. Siraj
- Department of Respiratory Care, College of Applied Medical Sciences, King Faisal University, Al Ahsa, Saudi Arabia
| | - Hassan Alwafi
- Faculty of Medicine, Umm Al-Qura University, Mecca, Saudi Arabia
| | - Abdulkareem A. AlGarni
- King Abdulaziz Hospital, The Ministry of National Guard Health Affairs, Al Ahsa, Saudi Arabia
- King Saud bin Abdulaziz University for Health Sciences, College of Applied Medical Sciences, Al Ahsa, Saudi Arabia
| | - Mansour S. Majrshi
- National Heart and Lung Institute, Imperial College London, London, United Kingdom
- Respiratory Medicine, Royal Brompton Hospital, London, United Kingdom
| | - Saad M. Alshehri
- Department of Respiratory Therapy, King Fahad General Hospital, Jeddah, Saudi Arabia
| | - Linhua Pang
- Respiratory Medicine Research Group, Academic Unit for Translational Medical Sciences, University of Nottingham School of Medicine, Nottingham, United Kingdom
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Kotlyarov S. The Role of Smoking in the Mechanisms of Development of Chronic Obstructive Pulmonary Disease and Atherosclerosis. Int J Mol Sci 2023; 24:ijms24108725. [PMID: 37240069 DOI: 10.3390/ijms24108725] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2023] [Revised: 05/05/2023] [Accepted: 05/11/2023] [Indexed: 05/28/2023] Open
Abstract
Tobacco smoking is a major cause of chronic obstructive pulmonary disease (COPD) and atherosclerotic cardiovascular disease (ASCVD). These diseases share common pathogenesis and significantly influence each other's clinical presentation and prognosis. There is increasing evidence that the mechanisms underlying the comorbidity of COPD and ASCVD are complex and multifactorial. Smoking-induced systemic inflammation, impaired endothelial function and oxidative stress may contribute to the development and progression of both diseases. The components present in tobacco smoke can have adverse effects on various cellular functions, including macrophages and endothelial cells. Smoking may also affect the innate immune system, impair apoptosis, and promote oxidative stress in the respiratory and vascular systems. The purpose of this review is to discuss the importance of smoking in the mechanisms underlying the comorbid course of COPD and ASCVD.
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Affiliation(s)
- Stanislav Kotlyarov
- Department of Nursing, Ryazan State Medical University, 390026 Ryazan, Russia
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3
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Liu C, Lu J, Yuan T, Xie L, Zhang L. EPC-exosomal miR-26a-5p improves airway remodeling in COPD by inhibiting ferroptosis of bronchial epithelial cells via PTGS2/PGE2 signaling pathway. Sci Rep 2023; 13:6126. [PMID: 37059741 PMCID: PMC10104834 DOI: 10.1038/s41598-023-33151-w] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Accepted: 04/07/2023] [Indexed: 04/16/2023] Open
Abstract
We aimed to investigate whether exosomes (Exo) affected chronic obstructive pulmonary disease (COPD) by influencing ferroptosis of bronchial epithelial cells (BECs) and the mechanisms involved. Here we took the peripheral blood samples of normal subjects and COPD patients, extracted and identified endothelial progenitor cells (EPCs) and EPC-Exo. An animal model of COPD was established. Then human BECs were taken and treated with cigarette smoke extract (CSE) for 24 h to construct a COPD cell model. Next, we screened differentially expressed ferroptosis-related genes in COPD patients by bioinformatics. Bioinformatics predicted the miRNA targeting PTGS2. Then, the mechanism of action of miR-26a-5p and Exo-miR-26a-5p was investigated in vitro. We successfully isolated and identified EPC and Exo. In vitro, EPC alleviated CSE-induced ferroptosis in BECs by transporting Exo. In vivo, Exo alleviated cigarette smoke-induced ferroptosis and airway remodeling in mice. Through further validation, we found that CSE-induced ferroptosis promoted the epithelial-mesenchymal transition (EMT) of BECs. Bioinformatics analysis and validation showed that PTGS2/PGE2 pathway affected CSE-induced ferroptosis in BECs. Meanwhile, miR-26a-5p targeting PTGS2 affected CSE-induced ferroptosis in BECs. Additionally, we found that miR-26a-5p affected CSE-induced BECs EMT. Exo-miR-26a-5p alleviated CSE-induced ferroptosis and EMT. In conclusion, EPC-exosomal miR-26a-5p improved airway remodeling in COPD by inhibiting ferroptosis of BECs via the PTGS2/PGE2 pathway.
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Affiliation(s)
- Caihong Liu
- Department of Pulmonary and Critical Care Medicine, The Third Xiangya Hospital of Central South University, 138 Tongzipo Road, Yuelu District, Changsha, 410013, Hunan, China
| | - Junjuan Lu
- Department of Pulmonary and Critical Care Medicine, The Third Xiangya Hospital of Central South University, 138 Tongzipo Road, Yuelu District, Changsha, 410013, Hunan, China
| | - Ting Yuan
- Department of Nutriology, Second Xiangya Hospital, Central South University, Changsha, 410001, Hunan, China
| | - Lihua Xie
- Department of Pulmonary and Critical Care Medicine, The Third Xiangya Hospital of Central South University, 138 Tongzipo Road, Yuelu District, Changsha, 410013, Hunan, China
| | - Li Zhang
- Department of Pulmonary and Critical Care Medicine, The Third Xiangya Hospital of Central South University, 138 Tongzipo Road, Yuelu District, Changsha, 410013, Hunan, China.
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4
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Alqarni AA, Brand OJ, Pasini A, Alahmari M, Alghamdi A, Pang L. Imbalanced prostanoid release mediates cigarette smoke-induced human pulmonary artery cell proliferation. Respir Res 2022; 23:136. [PMID: 35643499 PMCID: PMC9145181 DOI: 10.1186/s12931-022-02056-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2022] [Accepted: 05/10/2022] [Indexed: 11/20/2022] Open
Abstract
BACKGROUND Pulmonary hypertension is a common and serious complication of chronic obstructive pulmonary disease (COPD). Studies suggest that cigarette smoke can initiate pulmonary vascular remodelling by stimulating cell proliferation; however, the underlying cause, particularly the role of vasoactive prostanoids, is unclear. We hypothesize that cigarette smoke extract (CSE) can induce imbalanced vasoactive prostanoid release by differentially modulating the expression of respective synthase genes in human pulmonary artery smooth muscle cells (PASMCs) and endothelial cells (PAECs), thereby contributing to cell proliferation. METHODS Aqueous CSE was prepared from 3R4F research-grade cigarettes. Human PASMCs and PAECs were treated with or without CSE. Quantitative real-time RT-PCR and Western blotting were used to analyse the mRNA and protein expression of vasoactive prostanoid syhthases. Prostanoid concentration in the medium was measured using ELISA kits. Cell proliferation was assessed using the cell proliferation reagent WST-1. RESULTS We demonstrated that CSE induced the expression of cyclooxygenase-2 (COX-2), the rate-limiting enzyme in prostanoid synthesis, in both cell types. In PASMCs, CSE reduced the downstream prostaglandin (PG) I synthase (PGIS) mRNA and protein expression and PGI2 production, whereas in PAECs, CSE downregulated PGIS mRNA expression, but PGIS protein was undetectable and CSE had no effect on PGI2 production. CSE increased thromboxane (TX) A synthase (TXAS) mRNA expression and TXA2 production, despite undetectable TXAS protein in both cell types. CSE also reduced microsomal PGE synthase-1 (mPGES-1) protein expression and PGE2 production in PASMCs, but increased PGE2 production despite unchanged mPGES-1 protein expression in PAECs. Furthermore, CSE stimulated proliferation of both cell types, which was significantly inhibited by the selective COX-2 inhibitor celecoxib, the PGI2 analogue beraprost and the TXA2 receptor antagonist daltroban. CONCLUSIONS These findings provide the first evidence that cigarette smoke can induce imbalanced prostanoid mediator release characterized by the reduced PGI2/TXA2 ratio and contribute to pulmonary vascular remodelling and suggest that TXA2 may represent a novel therapeutic target for pulmonary hypertension in COPD.
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Affiliation(s)
- Abdullah A Alqarni
- Respiratory Medicine Research Group, Academic Unit for Translational Medical Sciences, University of Nottingham School of Medicine, City Hospital Campus, Nottingham, NG5 1PB, UK
- Department of Respiratory Therapy, Faculty of Medical Rehabilitation Sciences, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Oliver J Brand
- Respiratory Medicine Research Group, Academic Unit for Translational Medical Sciences, University of Nottingham School of Medicine, City Hospital Campus, Nottingham, NG5 1PB, UK
- Manchester Collaborative Centre for Inflammation Research, The Lydia Becker Institute of Immunology and Inflammation, University of Manchester, Manchester, UK
| | - Alice Pasini
- Respiratory Medicine Research Group, Academic Unit for Translational Medical Sciences, University of Nottingham School of Medicine, City Hospital Campus, Nottingham, NG5 1PB, UK
- Department of Electrical, Electronic and Information Engineering "Guglielmo Marconi" (DEI), University of Bologna, Via dell'Università 50, 47522, Cesena, FC, Italy
| | - Mushabbab Alahmari
- Respiratory Medicine Research Group, Academic Unit for Translational Medical Sciences, University of Nottingham School of Medicine, City Hospital Campus, Nottingham, NG5 1PB, UK
- Faculty of Applied Medical Sciences, Department of Respiratory Therapy, University of Bisha, 255, Al Nakhil, Bisha, 67714, Saudi Arabia
| | - Abdulrhman Alghamdi
- Respiratory Medicine Research Group, Academic Unit for Translational Medical Sciences, University of Nottingham School of Medicine, City Hospital Campus, Nottingham, NG5 1PB, UK
- Department of Rehabilitation Science, Respiratory Care Program, King Saud University, Riyadh, Saudi Arabia
| | - Linhua Pang
- Respiratory Medicine Research Group, Academic Unit for Translational Medical Sciences, University of Nottingham School of Medicine, City Hospital Campus, Nottingham, NG5 1PB, UK.
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Peng Y, Cheng W, Duan J, Zhao Y, Zhou Z, Zhou A, Deng M, Peng H, Ouyang R, Chen Y, Chen P. Prohibitin Protects Pulmonary Microvascular Endothelial Cells Against Cigarette Smoke Extract-Induced Cell Apoptosis and Inflammation. Int J Chron Obstruct Pulmon Dis 2022; 17:653-665. [PMID: 35378837 PMCID: PMC8976484 DOI: 10.2147/copd.s345058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Accepted: 03/12/2022] [Indexed: 11/23/2022] Open
Abstract
Background Prohibitin has been identified to play roles in cell survival and apoptosis. Here, this study aimed to clarify the role of prohibitin in cigarette smoke extract (CSE)-induced endothelial cell apoptosis. Methods The protein level of prohibitin was assessed by Western blot in lung tissues from emphysema and control mice. CSE-induced human pulmonary microvascular endothelial cells (hPMECs) were applied to mimic smoke-related cell apoptosis in vitro. Prohibitin was overexpressed in hPMECs with or without CSE. Mitochondrial function was analyzed by JC-1 staining and ATP assay kits. Oxidative stress was assessed by flow cytometry, fluorescence staining and immunocytochemistry. Apoptosis was analyzed by flow cytometry, Western blot and caspase-3 activity assays. In addition, the expression of inflammatory markers was assessed by Western blot and real-time polymerase chain reaction (PCR). The secretion of inflammatory cytokines was measured by ELISA. Results Prohibitin was downregulated in emphysema mouse tissues compared with control experiments. Consistently, CSE inhibited both the protein and RNA levels of prohibitin in hPMECs in a dose-dependent manner. Gain-of-function experiments indicated that CSE induced collapse of mitochondrial membrane potential (MMP) and loss of ATP, while prohibitin improved mitochondrial function. CSE induced robust ROS production and oxidative DNA damage, while prohibitin decreased this damage. Upregulation of prohibitin protected the apoptosis of hPMECs from CSE. Overexpression of prohibitin significantly reduced the levels of the main proinflammatory cytokines. Finally, prohibitin inhibited nuclear factor-kappa B (NF-κB) p65 accumulation and IκBα degradation induced by CSE. Conclusion The current findings suggest that CSE-mediated mitochondrial dysfunction, oxidative stress, cell apoptosis and inflammation in hPMECs were reduced by overexpression of prohibitin. We identified prohibitin as a novel regulator of endothelial cell apoptosis and survival in the context of CSE exposure.
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Affiliation(s)
- Yating Peng
- Department of Pulmonary and Critical Care Medicine, Second Xiang Ya Hospital, Central South University, Changsha, Hunan, 410011, People’s Republic of China
- Institute of Respiratory Disease, Central South University, Changsha, Hunan, 410011, People’s Republic of China
- Hunan Centre for Diagnosis and Treatment of Respiratory Disease, Changsha, Hunan, 410011, People’s Republic of China
| | - Wei Cheng
- Department of Pulmonary and Critical Care Medicine, Second Xiang Ya Hospital, Central South University, Changsha, Hunan, 410011, People’s Republic of China
- Institute of Respiratory Disease, Central South University, Changsha, Hunan, 410011, People’s Republic of China
- Hunan Centre for Diagnosis and Treatment of Respiratory Disease, Changsha, Hunan, 410011, People’s Republic of China
| | - Jiaxi Duan
- Department of Pulmonary and Critical Care Medicine, Second Xiang Ya Hospital, Central South University, Changsha, Hunan, 410011, People’s Republic of China
- Institute of Respiratory Disease, Central South University, Changsha, Hunan, 410011, People’s Republic of China
- Hunan Centre for Diagnosis and Treatment of Respiratory Disease, Changsha, Hunan, 410011, People’s Republic of China
| | - Yiyang Zhao
- Department of Pulmonary and Critical Care Medicine, Second Xiang Ya Hospital, Central South University, Changsha, Hunan, 410011, People’s Republic of China
- Institute of Respiratory Disease, Central South University, Changsha, Hunan, 410011, People’s Republic of China
- Hunan Centre for Diagnosis and Treatment of Respiratory Disease, Changsha, Hunan, 410011, People’s Republic of China
| | - Zijing Zhou
- Department of Pulmonary and Critical Care Medicine, Second Xiang Ya Hospital, Central South University, Changsha, Hunan, 410011, People’s Republic of China
- Institute of Respiratory Disease, Central South University, Changsha, Hunan, 410011, People’s Republic of China
- Hunan Centre for Diagnosis and Treatment of Respiratory Disease, Changsha, Hunan, 410011, People’s Republic of China
| | - Aiyuan Zhou
- Department of Pulmonary and Critical Care Medicine, Second Xiang Ya Hospital, Central South University, Changsha, Hunan, 410011, People’s Republic of China
- Institute of Respiratory Disease, Central South University, Changsha, Hunan, 410011, People’s Republic of China
- Hunan Centre for Diagnosis and Treatment of Respiratory Disease, Changsha, Hunan, 410011, People’s Republic of China
| | - Minhua Deng
- Department of Pulmonary and Critical Care Medicine, Second Xiang Ya Hospital, Central South University, Changsha, Hunan, 410011, People’s Republic of China
- Institute of Respiratory Disease, Central South University, Changsha, Hunan, 410011, People’s Republic of China
- Hunan Centre for Diagnosis and Treatment of Respiratory Disease, Changsha, Hunan, 410011, People’s Republic of China
- Department of Respiratory, PLA Rocket Force Characteristic Medical Center, Beijing, 100088, People’s Republic of China
| | - Hong Peng
- Department of Pulmonary and Critical Care Medicine, Second Xiang Ya Hospital, Central South University, Changsha, Hunan, 410011, People’s Republic of China
- Institute of Respiratory Disease, Central South University, Changsha, Hunan, 410011, People’s Republic of China
- Hunan Centre for Diagnosis and Treatment of Respiratory Disease, Changsha, Hunan, 410011, People’s Republic of China
| | - Ruoyun Ouyang
- Department of Pulmonary and Critical Care Medicine, Second Xiang Ya Hospital, Central South University, Changsha, Hunan, 410011, People’s Republic of China
- Institute of Respiratory Disease, Central South University, Changsha, Hunan, 410011, People’s Republic of China
- Hunan Centre for Diagnosis and Treatment of Respiratory Disease, Changsha, Hunan, 410011, People’s Republic of China
| | - Yan Chen
- Department of Pulmonary and Critical Care Medicine, Second Xiang Ya Hospital, Central South University, Changsha, Hunan, 410011, People’s Republic of China
- Institute of Respiratory Disease, Central South University, Changsha, Hunan, 410011, People’s Republic of China
- Hunan Centre for Diagnosis and Treatment of Respiratory Disease, Changsha, Hunan, 410011, People’s Republic of China
| | - Ping Chen
- Department of Pulmonary and Critical Care Medicine, Second Xiang Ya Hospital, Central South University, Changsha, Hunan, 410011, People’s Republic of China
- Institute of Respiratory Disease, Central South University, Changsha, Hunan, 410011, People’s Republic of China
- Hunan Centre for Diagnosis and Treatment of Respiratory Disease, Changsha, Hunan, 410011, People’s Republic of China
- Correspondence: Ping Chen, Email
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Low-dose aspirin and incidence of lung carcinoma in patients with chronic obstructive pulmonary disease in Hong Kong: A cohort study. PLoS Med 2022; 19:e1003880. [PMID: 35025879 PMCID: PMC8757901 DOI: 10.1371/journal.pmed.1003880] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/13/2021] [Accepted: 11/30/2021] [Indexed: 12/24/2022] Open
Abstract
BACKGROUND Evidence suggests that chronic obstructive pulmonary disease (COPD) is associated with a higher risk of lung carcinoma. Using a territory-wide clinical electronic medical records system, we investigated the association between low-dose aspirin use (≤160 mg) among patients with COPD and incidence of lung carcinoma and the corresponding risk of bleeding. METHODS AND FINDINGS This is a retrospective cohort study conducted utilizing Clinical Data Analysis Reporting System (CDARS), a territory-wide database developed by the Hong Kong Hospital Authority. Inverse probability of treatment weighting (IPTW) was used to balance baseline covariates between aspirin nonusers (35,049 patients) with new aspirin users (7,679 patients) among all eligible COPD patients from 2005 to 2018 attending any public hospitals. The median age of the cohort was 75.7 years (SD = 11.5), and 80.3% were male. Competing risk regression with Cox proportional hazards model were performed to estimate the subdistribution hazard ratio (SHR) of lung carcinoma with low-dose aspirin and the associated bleeding events. Of all eligible patients, 1,779 (4.2%, 1,526 and 253 among nonusers and users) were diagnosed with lung carcinoma over a median follow-up period of 2.6 years (interquartile range [IQR]: 1.4 to 4.8). Aspirin use was associated with a 25% lower risk of lung carcinoma (SHR = 0.75, 95% confidence interval [CI] 0.65 to 0.87, p = <0.001) and 26% decrease in lung carcinoma-related mortality (SHR = 0.74, 95% CI 0.64 to 0.86, p = <0.001). Subgroup analysis revealed that aspirin was beneficial for patients aged above or below 75 years, but was also beneficial among populations who were male, nondiabetic, and nonhypertensive. Aspirin use was not associated with an increased risk of upper gastrointestinal bleeding (UGIB) (SHR = 1.19, 95% CI 0.94 to 1.53, p = 0.16), but was associated with an increased risk of hemoptysis (SHR = 1.96, 95% CI 1.73 to 2.23, p < 0.001). The main limitations of the study were (i) that one group of patients may be more likely to seek additional medical attention, although this was partially mitigated by the use of propensity score analysis; and (ii) the observational nature of the study renders it unable to establish causality between aspirin use and lung carcinoma incidence. CONCLUSIONS In this study, we observed that low-dose aspirin use was associated with a lower risk of lung carcinoma and lung carcinoma-related mortality among COPD patients. While aspirin was not associated with an increased risk of UGIB, the risk of hemoptysis was elevated.
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Zhang L, Tai Y, Zhao C, Ma X, Tang S, Tong H, Tang C, Gao J. Inhibition of cyclooxygenase-2 enhanced intestinal epithelial homeostasis via suppressing β-catenin signalling pathway in experimental liver fibrosis. J Cell Mol Med 2021; 25:7993-8005. [PMID: 34145945 PMCID: PMC8358882 DOI: 10.1111/jcmm.16730] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2021] [Revised: 05/25/2021] [Accepted: 05/29/2021] [Indexed: 02/05/2023] Open
Abstract
The intestinal barrier dysfunction is crucial for the development of liver fibrosis but can be disturbed by intestinal chronic inflammation characterized with cyclooxygenase‐2 (COX‐2) expression. This study focused on the unknown mechanism by which COX‐2 regulates intestinal epithelial homeostasis in liver fibrosis. The animal models of liver fibrosis induced with TAA were established in rats and in intestinal epithelial–specific COX‐2 knockout mice. The impacts of COX‐2 on intestinal epithelial homeostasis via suppressing β‐catenin signalling pathway were verified pharmacologically and genetically in vivo. A similar assumption was tested in Ls174T cells with goblet cell phenotype in vitro. Firstly, disruption of intestinal epithelial homeostasis in cirrhotic rats was ameliorated by celecoxib, a selective COX‐2 inhibitor. Then, β‐catenin signalling pathway in cirrhotic rats was associated with the activation of COX‐2. Furthermore, intestinal epithelial–specific COX‐2 knockout could suppress β‐catenin signalling pathway and restore the disruption of ileal epithelial homeostasis in cirrhotic mice. Moreover, the effect of COX‐2/PGE2 was dependent on the β‐catenin signalling pathway in Ls174T cells. Therefore, inhibition of COX‐2 may enhance intestinal epithelial homeostasis via suppression of the β‐catenin signalling pathway in liver fibrosis.
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Affiliation(s)
- Linhao Zhang
- Laboratory of Gastroenterology & Hepatology, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, China.,Department of Gastroenterology, West China Hospital, Sichuan University, Chengdu, China
| | - Yang Tai
- Laboratory of Gastroenterology & Hepatology, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, China.,Department of Gastroenterology, West China Hospital, Sichuan University, Chengdu, China
| | - Chong Zhao
- Laboratory of Gastroenterology & Hepatology, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, China.,Department of Gastroenterology, West China Hospital, Sichuan University, Chengdu, China
| | - Xiao Ma
- Laboratory of Gastroenterology & Hepatology, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, China.,Department of Gastroenterology, West China Hospital, Sichuan University, Chengdu, China
| | - Shihang Tang
- Laboratory of Gastroenterology & Hepatology, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, China.,Department of Gastroenterology, West China Hospital, Sichuan University, Chengdu, China
| | - Huan Tong
- Laboratory of Gastroenterology & Hepatology, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, China.,Department of Gastroenterology, West China Hospital, Sichuan University, Chengdu, China
| | - Chengwei Tang
- Laboratory of Gastroenterology & Hepatology, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, China.,Department of Gastroenterology, West China Hospital, Sichuan University, Chengdu, China
| | - Jinhang Gao
- Laboratory of Gastroenterology & Hepatology, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, China.,Department of Gastroenterology, West China Hospital, Sichuan University, Chengdu, China
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Increased Serum Levels of Matrix-metalloproteinase-9, Cyclo-oxygenase-2 and Prostaglandin E-2 in Patients with Chronic Obstructive Pulmonary Disease (COPD). Indian J Clin Biochem 2021; 37:169-177. [PMID: 35463116 PMCID: PMC8994009 DOI: 10.1007/s12291-021-00973-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Accepted: 04/03/2021] [Indexed: 10/21/2022]
Abstract
Chronic obstructive pulmonary disease (COPD), a heterogeneous lung disorder that is characterized by airflow obstruction and the third leading cause of death, globally. COPD is influenced by environmental and genetic factors. Here, we measured the serum level of matrix metalloproteinase-9 (MMP-9), cyclooxygenase-2 (COX-2) and prostaglandin E-2 (PGE-2) and reveal the correlation between their levels in COPD subjects. In this study, we included a total of 79 COPD and 79 healthy controls. We assessed demographic profile, risk factors, respiratory symptoms, clinical history, COPD Assessment Test (CAT) score and spirometry. Further, we determined the serum levels of MMP-9, COX-2 and PGE-2 by enzyme-linked immunosorbent assay (ELISA). The correlation between their serum levels was also determined. Among the studied population age, gender, body mass index and socioeconomic status were comparable. Serum levels of MMP-9, COX-2 and PGE-2 were significantly increased in the COPD group than in healthy controls (P < 0.0001). Moreover, MMP-9, COX-2 and PGE-2 levels were increased with the GOLD grades and CAT score (> 10). Serum levels of MMP-9, COX-2 and PGE-2 was enhanced in patients with larger clinical history (> 20 years) than those with lower clinical history (< 10 years). Serum levels of MMP-9 and COX-2; MMP-9 and PGE-2; COX-2 and PGE-2 showed a positive correlation (P < 0.0001) with the COPD group. Our data demonstrate that serum levels of MMP-9, COX-2 and PGE-2 were correlated with the GOLD grade, CAT score and clinical history of the COPD group, pointing that they can be used as a indicators to understand the disease progression. Supplementary Information The online version contains supplementary material available at 10.1007/s12291-021-00973-2.
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9
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Song Q, Chen P, Liu XM. The role of cigarette smoke-induced pulmonary vascular endothelial cell apoptosis in COPD. Respir Res 2021; 22:39. [PMID: 33546691 PMCID: PMC7866753 DOI: 10.1186/s12931-021-01630-1] [Citation(s) in RCA: 56] [Impact Index Per Article: 18.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2020] [Accepted: 01/20/2021] [Indexed: 12/13/2022] Open
Abstract
Chronic obstructive pulmonary disease (COPD) is one of the most common chronic respiratory diseases with high morbidity and mortality. It has become the fifth most burdened and the third most deadly disease in the global economy and increases year by year. The prevention and treatment of COPD are urgent. Smoking is the main and most common risk factor for COPD. Cigarette smoke (CS) contains a large number of toxic substances, can cause a series of changes in the trachea, lung tissue, pulmonary blood vessels, and promotes the occurrence and development of COPD. In recent years, the development of epigenetics and molecular biology have provided new guidance for revealing the pathogenesis, diagnosis, and treatment of diseases. The latest research indicates that pulmonary vascular endothelial cell apoptosis initiates and participates in the pathogenesis of COPD. In this review, we summarize the current research on the epigenetic mechanisms and molecular biology of CS-induced pulmonary vascular endothelial cell apoptosis in COPD, providing a new research direction for pathogenesis of COPD and a new target for the diagnosis, treatment, and prevention of COPD.
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Affiliation(s)
- Qing Song
- Department of Respiratory and Critical Care Medicine, The Second Xiangya Hospital, Research Unit of Respiratory Disease, Diagnosis and Treatment Center of Respiratory Disease, Central South University, 139 Renmin Middle Road, Changsha, 410011, Hunan, China
| | - Ping Chen
- Department of Respiratory and Critical Care Medicine, The Second Xiangya Hospital, Research Unit of Respiratory Disease, Diagnosis and Treatment Center of Respiratory Disease, Central South University, 139 Renmin Middle Road, Changsha, 410011, Hunan, China.
| | - Xiang-Ming Liu
- Department of Respiratory and Critical Care Medicine, The Second Xiangya Hospital, Research Unit of Respiratory Disease, Diagnosis and Treatment Center of Respiratory Disease, Central South University, 139 Renmin Middle Road, Changsha, 410011, Hunan, China
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Zong DD, Liu XM, Li JH, Ouyang RY, Long YJ, Chen P, Chen Y. Resveratrol attenuates cigarette smoke induced endothelial apoptosis by activating Notch1 signaling mediated autophagy. Respir Res 2021; 22:22. [PMID: 33468121 PMCID: PMC7816466 DOI: 10.1186/s12931-021-01620-3] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Accepted: 01/07/2021] [Indexed: 12/28/2022] Open
Abstract
Background Increasing evidence shows that endothelial apoptosis contributes to cigarette smoke (CS)-induced disease progression, such as chronic obstructive pulmonary disease (COPD). Our previous studies have validated Notch1 as an anti-apoptotic signaling in CS-induced endothelial apoptosis. Resveratrol (RESV) is a naturally occurring polyphenol that exhibits an anti-apoptotic activity in endothelial cells that exposed to many kinds of destructive stimulus. However, the effects of resveratrol on Notch1 signaling in CS-induced endothelial apoptosis have not yet been fully elucidated. Therefore, the aim of this study was to examine whether RESV can protect endothelial cells from CS-induced apoptosis via regulating Notch1 signaling. Methods Human umbilical vein endothelial cells (HUVECs) were pretreated with RESV for 2 h, followed by cotreatment with 2.5%CSE for 24 h to explore the role of RESV in CSE induced endothelial apoptosis. 3-methyladenine (3-MA) or rapamycin was used to alter autophagic levels. Lentivirus Notch1 intracellular domain (LV-N1ICD), γ-secretase inhibitor (DAPT) and Notch1 siRNA were used to change Notch1 expression. The expression of Notch1, autophagic and apoptotic markers were examined by Western blot and the apoptosis rate was detected by Flow cytometry analysis. Results Our results showed that activating autophagy reduced CSE-induced endothelial apoptosis, while blocking autophagy promoted cell apoptosis in HUVECs. RESV pretreatment attenuated the CSE-induced endothelial apoptosis and activated Notch1 signaling. RESV pretreatment also increased LC3b-II and Beclin1 production, decreased p62 and mTOR expression. 3-MA treatment inhibited autophagy and aggravated CSE induced apoptosis, while rapamycin promoted autophagy, led to a decrease in cell apoptosis. LV-N1ICD transfection upregulated autophagy and reduced apoptosis. However, this protective effect was abolished by 3-MA treatment. In cells treated with DAPT or Notch1 siRNA, autophagy was decreased, while apoptosis was increased. RESV partly rescued the DAPT or Notch1 siRNA induced apoptosis by activating Notch1 signaling. Conclusion In HUVECs, RESV attenuates CSE induced endothelial apoptosis by inducing autophagy in a Notch1-dependent manner.
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Affiliation(s)
- Dan-Dan Zong
- Department of Respiratory and Critical Care Medicine, The Second Xiangya Hospital, Central South University, Changsha, 410011, Hunan, China.,Research Unit of Respiratory Disease, Central South University, Changsha, 410011, Hunan, China.,Diagnosis and Treatment Center of Respiratory Disease, Central South University, Changsha, 410011, Hunan, China
| | - Xiang-Ming Liu
- Department of Respiratory and Critical Care Medicine, The Second Xiangya Hospital, Central South University, Changsha, 410011, Hunan, China.,Research Unit of Respiratory Disease, Central South University, Changsha, 410011, Hunan, China.,Diagnosis and Treatment Center of Respiratory Disease, Central South University, Changsha, 410011, Hunan, China
| | - Jin-Hua Li
- Department of Respiratory and Critical Care Medicine, The Second Xiangya Hospital, Central South University, Changsha, 410011, Hunan, China.,Research Unit of Respiratory Disease, Central South University, Changsha, 410011, Hunan, China.,Diagnosis and Treatment Center of Respiratory Disease, Central South University, Changsha, 410011, Hunan, China
| | - Ruo-Yun Ouyang
- Department of Respiratory and Critical Care Medicine, The Second Xiangya Hospital, Central South University, Changsha, 410011, Hunan, China.,Research Unit of Respiratory Disease, Central South University, Changsha, 410011, Hunan, China.,Diagnosis and Treatment Center of Respiratory Disease, Central South University, Changsha, 410011, Hunan, China
| | - Ying-Jiao Long
- Department of Respiratory and Critical Care Medicine, The Second Xiangya Hospital, Central South University, Changsha, 410011, Hunan, China.,Research Unit of Respiratory Disease, Central South University, Changsha, 410011, Hunan, China.,Diagnosis and Treatment Center of Respiratory Disease, Central South University, Changsha, 410011, Hunan, China
| | - Ping Chen
- Department of Respiratory and Critical Care Medicine, The Second Xiangya Hospital, Central South University, Changsha, 410011, Hunan, China. .,Research Unit of Respiratory Disease, Central South University, Changsha, 410011, Hunan, China. .,Diagnosis and Treatment Center of Respiratory Disease, Central South University, Changsha, 410011, Hunan, China.
| | - Yan Chen
- Department of Respiratory and Critical Care Medicine, The Second Xiangya Hospital, Central South University, Changsha, 410011, Hunan, China. .,Research Unit of Respiratory Disease, Central South University, Changsha, 410011, Hunan, China. .,Diagnosis and Treatment Center of Respiratory Disease, Central South University, Changsha, 410011, Hunan, China.
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11
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Peng H, Guo T, Chen Z, Zhang H, Cai S, Yang M, Chen P, Guan C, Fang X. Hypermethylation of mitochondrial transcription factor A induced by cigarette smoke is associated with chronic obstructive pulmonary disease. Exp Lung Res 2019; 45:101-111. [PMID: 31198067 DOI: 10.1080/01902148.2018.1556748] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2018] [Revised: 11/21/2018] [Accepted: 12/04/2018] [Indexed: 02/08/2023]
Abstract
Purpose of the study: Cigarette smoking is a leading environmental contributor to chronic obstructive pulmonary disease (COPD), but its epigenetic regulation of mtTFA gene remains elusive. This study aims to explore the relationship of DNA methylation of mtTFA and cigarette smoking in COPD. Materials and Methods: We analyzed DNA methylation on mtTFA promoters in clinical samples from COPD patients and subjects with normal pulmonary function. Expression of mtTFA mRNA in the clinical samples and mtTFA mRNA and protein in human umbilical vein endothelial cells(HUVECs) treated with cigarette smoke extract (CSE) was evaluated. mtTFA mRNA and protein levels were measured to determine effects of demethylation agents on CSE-treated HUVECs. Results: The DNA methylation level of the mtTFA promoter was significantly increased in COPD group. Expression of mtTFA mRNA was downregulated in the lungs as a consequence of hypermethylation of mtTFA promoter. Expression of mtTFA mRNA and protein was downregulated in CSE-treated HUVECs as a consequence of hypermethylation of the mtTFA promoter. mtTFA expression in CSE-treated HUVECs was restored by the methylation inhibitor, 5-aza-2'-deoxycytidine(AZA). Conclusions: Cigarette smoke-induced hypermethylation of the mtTFA promoter is related to the initiation and progression of COPD. Our finding may provide a new strategy for the intervention of COPD by developing demethylation agents targeting mtTFA hypermethylation.
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Affiliation(s)
- Hong Peng
- a Department of Respiratory and Critical Care Medicine , The Second Xiangya Hospital of Central-South University , Changsha , PR China
- b b The Respiratory Disease Research Institute of Central South University , Changsha , PR China
- c c The Respiratory Disease Diagnosis and Treatment Center of Hunan Province , Changsha , PR China
| | - Ting Guo
- a Department of Respiratory and Critical Care Medicine , The Second Xiangya Hospital of Central-South University , Changsha , PR China
- b b The Respiratory Disease Research Institute of Central South University , Changsha , PR China
- c c The Respiratory Disease Diagnosis and Treatment Center of Hunan Province , Changsha , PR China
| | - Zhiyong Chen
- d d Department of Urology , Xiangya Hospital of Central-South University , Changsha , PR China
| | - Hongliang Zhang
- a Department of Respiratory and Critical Care Medicine , The Second Xiangya Hospital of Central-South University , Changsha , PR China
- b b The Respiratory Disease Research Institute of Central South University , Changsha , PR China
- c c The Respiratory Disease Diagnosis and Treatment Center of Hunan Province , Changsha , PR China
| | - Shan Cai
- a Department of Respiratory and Critical Care Medicine , The Second Xiangya Hospital of Central-South University , Changsha , PR China
- b b The Respiratory Disease Research Institute of Central South University , Changsha , PR China
- c c The Respiratory Disease Diagnosis and Treatment Center of Hunan Province , Changsha , PR China
| | - Min Yang
- a Department of Respiratory and Critical Care Medicine , The Second Xiangya Hospital of Central-South University , Changsha , PR China
- b b The Respiratory Disease Research Institute of Central South University , Changsha , PR China
- c c The Respiratory Disease Diagnosis and Treatment Center of Hunan Province , Changsha , PR China
| | - Ping Chen
- a Department of Respiratory and Critical Care Medicine , The Second Xiangya Hospital of Central-South University , Changsha , PR China
- b b The Respiratory Disease Research Institute of Central South University , Changsha , PR China
- c c The Respiratory Disease Diagnosis and Treatment Center of Hunan Province , Changsha , PR China
| | - Chaxiang Guan
- e Physiological Research Center , Xiangya Medical School of Central-South University , Changsha , PR China
| | - Xiang Fang
- f Department of Neurology , University of Texas Medical Branch , Galveston , Texas, USA
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12
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Influence of Active Exposure to Tobacco Smoke on Nitric Oxide Status of Pregnant Women. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2018; 15:ijerph15122719. [PMID: 30513890 PMCID: PMC6313314 DOI: 10.3390/ijerph15122719] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/26/2018] [Revised: 11/14/2018] [Accepted: 11/14/2018] [Indexed: 12/12/2022]
Abstract
Smoking tobacco can impair proper vascular endothelial functioning. This is exhibited through reduced nitric oxide synthesis as well as activity due to accompanying oxidative stress. We examined the relationship between nitric oxide and markers of oxidative stress/antioxidant defense in serum of smoking and non-smoking pregnant women. Subjects included 99 healthy pregnant women, who were tested for nitric oxide (NO), endothelial (eNOS) and inducible (iNOS) nitric oxide synthase, total oxidant capacity (TOC), and total antioxidant capacity (TAC). NO, eNOS, and TAC serum concentrations were significantly lower (p < 0.005), but iNOS (p < 0.05) and TOC (p < 0.001) were higher in smokers than in non-smokers. Multivariate regression analysis showed associations between NO concentration and eNOS, TAC, and smoking status in the whole group of patients. In the model estimated separately for smokers, the highest impact of eNOS (β = 0.375; p = 0.021) and cotinine (β = −0.323; p = 0.037) was indicated for NO concentration. In the model of non-smokers, eNOS (β = 0.291, p = 0.030) and TAC (β = 0.350; p = 0.015) were important for NO level. Smoking during pregnancy could exacerbate oxidative stress, impair the action of nitric oxide synthases, and adversely affect the balance of oxygen and nitrogen metabolism. Relationships between NO concentrations and TAC in the studied women’s blood can confirm the antioxidant nature of nitric oxide.
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Gibbs-Flournoy EA, Gilmour MI, Higuchi M, Jetter J, George I, Copeland L, Harrison R, Moser VC, Dye JA. Differential exposure and acute health impacts of inhaled solid-fuel emissions from rudimentary and advanced cookstoves in female CD-1 mice. ENVIRONMENTAL RESEARCH 2018; 161:35-48. [PMID: 29100208 PMCID: PMC6143295 DOI: 10.1016/j.envres.2017.10.043] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2017] [Revised: 09/25/2017] [Accepted: 10/24/2017] [Indexed: 05/04/2023]
Abstract
BACKGROUND There is an urgent need to provide access to cleaner end user energy technologies for the nearly 40% of the world's population who currently depend on rudimentary cooking and heating systems. Advanced cookstoves (CS) are designed to cut emissions and solid-fuel consumption, thus reducing adverse human health and environmental impacts. STUDY PREMISE We hypothesized that, compared to a traditional (Tier 0) three-stone (3-S) fire, acute inhalation of solid-fuel emissions from advanced natural-draft (ND; Tier 2) or forced-draft (FD; Tier 3) stoves would reduce exposure biomarkers and lessen pulmonary and innate immune system health effects in exposed mice. RESULTS Across two simulated cooking cycles (duration ~ 3h), emitted particulate mass concentrations were reduced 80% and 62% by FD and ND stoves, respectively, compared to the 3-S fire; with corresponding decreases in particles visible within murine alveolar macrophages. Emitted carbon monoxide was reduced ~ 90% and ~ 60%, respectively. Only 3-S-fire-exposed mice had increased carboxyhemoglobin levels. Emitted volatile organic compounds were FD ≪ 3-S-fire ≤ ND stove; increased expression of genes involved in xenobiotic metabolism (COX-2, NQO1, CYP1a1) was detected only in ND- and 3-S-fire-exposed mice. Diminished macrophage phagocytosis was observed in the ND group. Lung glutathione was significantly depleted across all CS groups, however the FD group had the most severe, ongoing oxidative stress. CONCLUSIONS These results are consistent with reports associating exposure to solid fuel stove emissions with modulation of the innate immune system and increased susceptibility to infection. Lower respiratory infections continue to be a leading cause of death in low-income economies. Notably, 3-S-fire-exposed mice were the only group to develop acute lung injury, possibly because they inhaled the highest concentrations of hazardous air toxicants (e.g., 1,3-butadiene, toluene, benzene, acrolein) in association with the greatest number of particles, and particles with the highest % organic carbon. However, no Tier 0-3 ranked CS group was without some untoward health effect indicating that access to still cleaner, ideally renewable, energy technologies for cooking and heating is warranted.
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Affiliation(s)
| | - M Ian Gilmour
- National Health and Environmental Research Laboratory (NHEERL), Office of Research and Development, US Environmental Protection Agency, Research Triangle Park, NC 27711, USA
| | - Mark Higuchi
- National Health and Environmental Research Laboratory (NHEERL), Office of Research and Development, US Environmental Protection Agency, Research Triangle Park, NC 27711, USA
| | - James Jetter
- National Risk Management Research Laboratory (NRMRL), Office of Research and Development, US Environmental Protection Agency, Research Triangle Park, NC 27711, USA
| | - Ingrid George
- National Risk Management Research Laboratory (NRMRL), Office of Research and Development, US Environmental Protection Agency, Research Triangle Park, NC 27711, USA
| | - Lisa Copeland
- National Health and Environmental Research Laboratory (NHEERL), Office of Research and Development, US Environmental Protection Agency, Research Triangle Park, NC 27711, USA
| | - Randy Harrison
- National Health and Environmental Research Laboratory (NHEERL), Office of Research and Development, US Environmental Protection Agency, Research Triangle Park, NC 27711, USA
| | - Virginia C Moser
- National Health and Environmental Research Laboratory (NHEERL), Office of Research and Development, US Environmental Protection Agency, Research Triangle Park, NC 27711, USA
| | - Janice A Dye
- National Health and Environmental Research Laboratory (NHEERL), Office of Research and Development, US Environmental Protection Agency, Research Triangle Park, NC 27711, USA.
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Sakuma K, Yamaguchi A. Drugs of Muscle Wasting and Their Therapeutic Targets. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2018; 1088:463-481. [PMID: 30390265 DOI: 10.1007/978-981-13-1435-3_21] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Muscle wasting and weakness such as cachexia, atrophy, and sarcopenia are characterized by marked decreases in the protein content, myonuclear number, muscle fiber size, and muscle strength. This chapter focuses on the recent advances of pharmacological approach for attenuating muscle wasting.A myostatin-inhibiting approach is very intriguing to prevent sarcopenia but not muscular dystrophy in humans. Supplementation with ghrelin is also an important candidate to combat sarcopenia as well as cachexia. Treatment with soy isoflavone, trichostatin A (TSA), and cyclooxygenase 2 (Cox2) inhibitors seems to be effective modulators attenuating muscle wasting, although further systematic research is needed on this treatment in particular concerning side effects.
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Affiliation(s)
- Kunihiro Sakuma
- Institute for Liberal Arts, Environment and Society, Tokyo Institute of Technology, Tokyo, Japan.
| | - Akihiko Yamaguchi
- Department of Physical Therapy, Health Sciences University of Hokkaido, Ishikari-Tobetsu, Hokkaido, Japan
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