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Li F, Wang Y, Tian J, Zhou Z, Yin W, Qin X, Wang H, Zeng T, Li A, Jiang J. Inhibition of calpain9 attenuates peritoneal dialysis-related peritoneal fibrosis. Front Pharmacol 2022; 13:962770. [DOI: 10.3389/fphar.2022.962770] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2022] [Accepted: 11/18/2022] [Indexed: 12/04/2022] Open
Abstract
Aim: Peritoneal dialysis is a common renal replacement method for end-stage renal disease. Long-term peritoneal dialysis leads to peritoneal dialysis-related peritoneal fibrosis, which leads to a cessation of treatment. Calpain is a protein belonging to calcium-dependent endopeptidase family and plays an important role in extracellular matrix remodeling. Here, we evaluated the effect of calpain in peritoneal dialysis-related peritoneal fibrosis.Methods: We established two animal models of peritoneal fibrosis and inhibited the activity of Calpain, and then collected peritoneal tissue to evaluate the progress of fibrosis and the changes of Calpain and β-catenin. We obtained Rat peritoneal mesothelial cells and Human peritoneal mesothelial cell line and stimulated with TGF-β to produce extracellular matrix. Next we inhibited Calpain activity or reduced Calpain9 expression, and then assessed changes in extracellular matrix and β-catenin.Results: Inhibition of calpain activity attenuated chlorhexidine glucose and peritoneal dialysis-induced peritoneal thickening and β-catenin expression in mice. In addition, compared with the control group, when primary rat peritoneal mesothelial cells or human peritoneal mesothelial cells were treated with transforming growth factor beta, down-regulation of calpain activity inhibited the expression of Fibronectin and Collagen I, and increased the expression of E-cadherin. These changes could be adjusted after silencing calpain9. Finally, calpain9 deficiency was associated with down-regulation of Fibronectin and β-catenin in human peritoneal mesothelial cells.Conclusion: Our results suggest that calpain9 may be a key molecule in mediating peritoneal dialysis-related peritoneal fibrosis.
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2
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Kang N, Shan H, Wang J, Mei J, Jiang Y, Zhou J, Huang C, Zhang H, Zhang M, Zhen X, Yan G, Sun H. Calpain7 negatively regulates human endometrial stromal cell decidualization in EMs by promoting FoxO1 nuclear exclusion via hydrolyzing AKT1. Biol Reprod 2022; 106:1112-1125. [PMID: 35191464 DOI: 10.1093/biolre/ioac041] [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: 10/20/2021] [Revised: 01/31/2022] [Accepted: 02/18/2022] [Indexed: 11/14/2022] Open
Abstract
Endometrial receptivity damage caused by impaired decidualization may be one of the mechanisms of infertility in endometriosis (EMs). Our previous study demonstrated that Calpain-7 (CAPN7) is abnormally overexpressed in EMs. Whether CAPN7 affects the regulation of decidualization and by what mechanism CAPN7 regulates decidualization remains to be determined. In this study, we found CAPN7 expression decreased during human endometrial stromal cell (HESC) decidualization in vitro. CAPN7 negatively regulated decidualization in vitro and in vivo. We also identified one conserved potential PEST sequence in the AKT1 protein and found that CAPN7 was able to hydrolyse AKT1 and enhance AKT1's phosphorylation. Correspondingly, CAPN7 notably promoted the phosphorylation of Forkhead Box O1 (FoxO1), the downstream of AKT1 protein, at Ser319, leading to increased FoxO1 exclusion from nuclei and attenuated FoxO1 transcriptional activity in decidualized HESC. In addition, we detected endometrium CAPN7, p-AKT1 and p-FoxO1 expressions were increased in EMs. These data demonstrate that CAPN7 negatively regulates HESC decidualization in EMs probably by promoting FoxO1's phosphorylation and FoxO1 nuclear exclusion via hydrolyzing AKT1. The dysregulation of CAPN7 may be a novel cause of EMs.
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Affiliation(s)
- Nannan Kang
- Center for Reproductive Medicine, Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, 210008, People's Republic of China.,Center for Molecular Reproductive Medicine, Nanjing University, Nanjing, 210008, People's Republic of China
| | - Huizhi Shan
- Center for Reproductive Medicine, Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, 210008, People's Republic of China.,Center for Molecular Reproductive Medicine, Nanjing University, Nanjing, 210008, People's Republic of China
| | - Junxia Wang
- Center for Reproductive Medicine, Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, 210008, People's Republic of China.,Center for Molecular Reproductive Medicine, Nanjing University, Nanjing, 210008, People's Republic of China
| | - Jie Mei
- Center for Reproductive Medicine, Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, 210008, People's Republic of China.,Center for Molecular Reproductive Medicine, Nanjing University, Nanjing, 210008, People's Republic of China
| | - Yue Jiang
- Center for Reproductive Medicine, Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, 210008, People's Republic of China.,Center for Molecular Reproductive Medicine, Nanjing University, Nanjing, 210008, People's Republic of China
| | - Jidong Zhou
- Center for Reproductive Medicine, Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, 210008, People's Republic of China.,Center for Molecular Reproductive Medicine, Nanjing University, Nanjing, 210008, People's Republic of China
| | - Chenyang Huang
- Center for Reproductive Medicine, Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, 210008, People's Republic of China.,Center for Molecular Reproductive Medicine, Nanjing University, Nanjing, 210008, People's Republic of China
| | - Hui Zhang
- Center for Reproductive Medicine, Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, 210008, People's Republic of China.,Center for Molecular Reproductive Medicine, Nanjing University, Nanjing, 210008, People's Republic of China
| | - Mei Zhang
- Center for Reproductive Medicine, Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, 210008, People's Republic of China.,Center for Molecular Reproductive Medicine, Nanjing University, Nanjing, 210008, People's Republic of China
| | - Xin Zhen
- Center for Reproductive Medicine, Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, 210008, People's Republic of China.,Center for Molecular Reproductive Medicine, Nanjing University, Nanjing, 210008, People's Republic of China
| | - Guijun Yan
- Center for Reproductive Medicine, Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, 210008, People's Republic of China.,Center for Molecular Reproductive Medicine, Nanjing University, Nanjing, 210008, People's Republic of China
| | - Haixiang Sun
- Center for Reproductive Medicine, Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, 210008, People's Republic of China.,Center for Molecular Reproductive Medicine, Nanjing University, Nanjing, 210008, People's Republic of China.,State Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing, 210032, People's Republic of China
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3
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Zhou LL, Cheng PP, He XL, Liang LM, Wang M, Lu YZ, Song LJ, Xiong L, Xiang F, Yu F, Wang X, Xin JB, Greer PA, Su Y, Ma WL, Ye H. Pleural mesothelial cell migration into lung parenchyma by calpain contributes to idiopathic pulmonary fibrosis. J Cell Physiol 2021; 237:566-579. [PMID: 34231213 DOI: 10.1002/jcp.30500] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2020] [Revised: 06/22/2021] [Accepted: 06/25/2021] [Indexed: 12/16/2022]
Abstract
Idiopathic pulmonary fibrosis (IPF) is defined as a specific form of chronic, progressive fibrosing interstitial pneumonia. It is unknown why fibrosis in IPF distributes in the peripheral or named sub-pleural area. Migration of pleural mesothelial cells (PMC) should contribute to sub-pleural fibrosis. Calpain is known to be involved in cell migration, but the role of calpain in PMC migration has not been investigated. In this study, we found that PMCs migrated into lung parenchyma in patients with IPF. Then using Wt1tm1(EGFP/Cre)Wtp /J knock-in mice, we observed PMC migration into lung parenchyma in bleomycin-induced pleural fibrosis models, and calpain inhibitor attenuated pulmonary fibrosis with prevention of PMC migration. In vitro studies revealed that bleomycin and transforming growth factor-β1 increased calpain activity in PMCs, and activated calpain-mediated focal adhesion (FA) turnover as well as cell migration, cell proliferation, and collagen-I synthesis. Furthermore, we determined that calpain cleaved FA kinase in both C-terminal and N-terminal regions, which mediated FA turnover. Lastly, the data revealed that activated calpain was also involved in phosphorylation of cofilin-1, and p-cofilin-1 induced PMC migration. Taken together, this study provides evidence that calpain mediates PMC migration into lung parenchyma to promote sub-pleural fibrosis in IPF.
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Affiliation(s)
- Li-Ling Zhou
- Department of Respiratory and Critical Care Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Pei-Pei Cheng
- Department of Pathophysiology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Xin-Liang He
- Department of Respiratory and Critical Care Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Key Laboratory of Respiratory Diseases, National Health Commission of China, Wuhan, China
| | - Li-Mei Liang
- Department of Respiratory and Critical Care Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Meng Wang
- Department of Pathophysiology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yu-Zhi Lu
- Department of Respiratory and Critical Care Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Lin-Jie Song
- Department of Respiratory and Critical Care Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Key Laboratory of Respiratory Diseases, National Health Commission of China, Wuhan, China
| | - Liang Xiong
- Department of Respiratory and Critical Care Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Key Laboratory of Respiratory Diseases, National Health Commission of China, Wuhan, China
| | - Fei Xiang
- Department of Respiratory and Critical Care Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Key Laboratory of Respiratory Diseases, National Health Commission of China, Wuhan, China
| | - Fan Yu
- Department of Respiratory and Critical Care Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Key Laboratory of Respiratory Diseases, National Health Commission of China, Wuhan, China
| | - Xiaorong Wang
- Department of Respiratory and Critical Care Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Key Laboratory of Respiratory Diseases, National Health Commission of China, Wuhan, China
| | - Jian-Bao Xin
- Department of Respiratory and Critical Care Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Key Laboratory of Respiratory Diseases, National Health Commission of China, Wuhan, China
| | - Peter A Greer
- Division of Cancer Biology and Genetics, Queen's University Cancer Research Institute, Kingston, Ontario, Canada
| | - Yunchao Su
- Department of Pharmacology and Toxicology, Medical College of Georgia, Augusta University, Augusta, Georgia, USA
| | - Wan-Li Ma
- Department of Respiratory and Critical Care Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Key Laboratory of Respiratory Diseases, National Health Commission of China, Wuhan, China
| | - Hong Ye
- Department of Pathophysiology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Key Laboratory of Respiratory Diseases, National Health Commission of China, Wuhan, China
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4
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Li F, Hong X, Jiang J. [Calpain activation promotes dialysis-associated peritoneal fibrosis in rats]. NAN FANG YI KE DA XUE XUE BAO = JOURNAL OF SOUTHERN MEDICAL UNIVERSITY 2021; 41:593-599. [PMID: 33963721 DOI: 10.12122/j.issn.1673-4254.2021.04.17] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
OBJECTIVE To explore the role of calpain activation in the progression of peritoneal fibrosis. OBJECTIVE Twenty-four male Sprague-Dawley rats were randomized equally into control group, MDL28170 (a calpain inhibitor)+normal saline group, peritoneal dialysis (PD) model group and PD + MDL28170 group. In the latter two groups, the rats received daily intraperitoneal injections of 100 mL/kg of 4.25% glucose PD solution, and those in PD+MDL28170 group and MDL28170 saline group received daily infusion of 4 mg/kg MDL28170 every other day. Eight weeks later, the rats were euthanized for pathological examination of the parietal peritoneum, and the visceral peritoneum was used for examining the activation status of calpain and the expressions of fibronectin (FN) and collagen I (COL-I). Calpain activation and expressions of FN, COL-I and α-SMA were also examined using Western blotting and immunofluorescence assay in primary cultures of rat peritoneal mesothelial cells treated with MDL28170, transforming growth factor-β (TGF-β), or both. OBJECTIVE Compared with the control rats, the rats in PD model group showed significantly increased peritoneal peritoneum thickness, calpain activation in the peritoneal tissue, and expressions of FN and COL-I (P < 0.05). Treatment with MDL28170 significantly alleviated associated peritoneal fibrosis, decreased the thickness of the peritoneum (P < 0.05), and reduced the expressions of FN and COL-I in the rats with daily PD (P < 0.05). In the in vitro experiment, the expressions of FN and COL-I were also significantly lower in rat peritoneal mesothelial cells treated with both MDL28170 and TGF-β than in the cells treated with TGF-β alone (P < 0.05). OBJECTIVE Peritoneal calpain activity and expressions FN and COL-I all increase significantly in rat models of PD-associated peritoneal fibrosis. Calpain activation can promote peritoneal fibrosis, and inhibition of calpain can alleviate peritoneal fibrosis.
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Affiliation(s)
- F Li
- Department of Nephrology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - X Hong
- Department of Nephrology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - J Jiang
- Department of Nephrology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
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5
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Lu YZ, Liang LM, Cheng PP, Xiong L, Wang M, Song LJ, Yu F, He XL, Xiong L, Wang XR, Xin JB, Ye H, Ma WL. VEGF/Src signaling mediated pleural barrier damage and increased permeability contributes to subpleural pulmonary fibrosis. Am J Physiol Lung Cell Mol Physiol 2021; 320:L990-L1004. [PMID: 33787325 DOI: 10.1152/ajplung.00436.2020] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
The distribution of fibrosis in idiopathic pulmonary fibrosis (IPF) is subpleural with basal predominance. Alveolar epithelial cell was considered as the key cell in the initial phase of IPF. However, the idea of activation and damage of alveolar epithelial cells is very difficult to explain why fibrosis distributes in the subpleural area. In this study, human pleural mesothelial cell (PMC) line and primary rat PMC was used as in vitro model. Intraperitoneal injection of bleomycin was used for making a pulmonary fibrosis model. The integrity of cultured monolayer PMCs was determined by transepithelial electric resistance (TEER). Pleural permeability was estimated by measuring paracellular transport of fluorescein isothiocyanate (FITC)-conjugated dextran. Changes in lung tissue of patients with IPF were analyzed by Masson's and immunofluorescence staining. We found bleomycin induced PMCs damage and increased PMCs permeability; increased PMCs permeability aggravated bleomycin-induced subpleural inflammation and pulmonary fibrosis. Moreover, bleomycin was found to activate VEGF/Src signaling which increased PMCs permeability. In vivo, inhibition of VEGF/Src signaling prevented bleomycin-induced subpleural pulmonary fibrosis. At last, activation of VEGF/Src signaling was confirmed in subpleural area in patients with IPF. Taken together, our findings indicate that VEGF/Src signaling mediated pleural barrier damage and increased permeability which contributes to subpleural pulmonary fibrosis.
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Affiliation(s)
- Yu-Zhi Lu
- Department of Respiratory and Critical Care Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People's Republic of China
| | - Li-Mei Liang
- Department of Respiratory and Critical Care Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People's Republic of China
| | - Pei-Pei Cheng
- Department of Pathophysiology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People's Republic of China
| | - Li Xiong
- Department of Respiratory and Critical Care Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People's Republic of China
| | - Meng Wang
- Department of Pathophysiology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People's Republic of China
| | - Lin-Jie Song
- Department of Respiratory and Critical Care Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People's Republic of China.,Key Laboratory of Respiratory Diseases, Ministry of Health of China, Wuhan, People's Republic of China
| | - Fan Yu
- Department of Respiratory and Critical Care Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People's Republic of China.,Key Laboratory of Respiratory Diseases, Ministry of Health of China, Wuhan, People's Republic of China
| | - Xin-Liang He
- Department of Respiratory and Critical Care Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People's Republic of China.,Key Laboratory of Respiratory Diseases, Ministry of Health of China, Wuhan, People's Republic of China
| | - Liang Xiong
- Department of Respiratory and Critical Care Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People's Republic of China.,Key Laboratory of Respiratory Diseases, Ministry of Health of China, Wuhan, People's Republic of China
| | - Xiao-Rong Wang
- Department of Respiratory and Critical Care Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People's Republic of China.,Key Laboratory of Respiratory Diseases, Ministry of Health of China, Wuhan, People's Republic of China
| | - Jian-Bao Xin
- Department of Respiratory and Critical Care Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People's Republic of China.,Key Laboratory of Respiratory Diseases, Ministry of Health of China, Wuhan, People's Republic of China
| | - Hong Ye
- Department of Pathophysiology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People's Republic of China.,Key Laboratory of Respiratory Diseases, Ministry of Health of China, Wuhan, People's Republic of China
| | - Wan-Li Ma
- Department of Respiratory and Critical Care Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People's Republic of China.,Key Laboratory of Respiratory Diseases, Ministry of Health of China, Wuhan, People's Republic of China
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6
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Tuberculous Fibrosis Enhances Tumorigenic Potential via the NOX4-Autophagy Axis. Cancers (Basel) 2021; 13:cancers13040687. [PMID: 33567693 PMCID: PMC7916030 DOI: 10.3390/cancers13040687] [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: 12/18/2020] [Revised: 01/28/2021] [Accepted: 02/01/2021] [Indexed: 12/18/2022] Open
Abstract
Simple Summary Although previous studies have reported coexistence of pulmonary TB and carcinoma, the underlying mechanism of tuberculous fibrosis-induced tumorigenicity remains to be investigated. We previously reported that NOX4 signaling mediates tuberculous pleural fibrosis by activating ERK–ROS–EMT pathways. We were interested in the role of NOX4 in the tumor microenvironment changed by tuberculosis fibrosis. Our results showed that lung cancer cells enhanced the NOX4 expression and invasive potential after exposure to the conditioned medium of heat-killed Mycobacterium tuberculosis stimulated mesothelial cells or tuberculous pleural effusion. NOX4–autophagy signaling axis contributes to the interaction between tuberculosis fibrosis and lung cancer. Silencing of NOX4 signaling in tuberculous fibrosis reduced the metastatic potential by enhancing autophagy in both in vivoand in vitro studies. This result suggests that NOX4-P62 might serve as a therapeutic target for tuberculous fibrosis-associated lung cancer. Abstract While a higher incidence of lung cancer in subjects with previous tuberculous infection has been reported in epidemiologic data, the mechanism by which previous tuberculosis affects lung cancer remains unclear. We investigated the role of NOX4 in tuberculous pleurisy-assisted tumorigenicity both in vitro and in vivo.Heat-killed Mycobacterium tuberculosis-stimulated mesothelial cells augmented the migrationand invasive potential of lung cancer cells in a NOX4-dependent manner. Mice with Mycobacterium bovis bacillus Calmette–Guérin (BCG) pleural infection exhibited increased expression of NOX4 and enhanced malignant potential of lung cancer compared to mice with intrathoracic injection of phosphate-buffered saline. The BCG+ KLN205 (KLN205 cancer cell injection after BCG treatment) NOX4 KO mice group showed reduced tuberculous fibrosis-promoted metastatic potential of lung cancer, increased autophagy, and decreased expression of TGF-β, IL-6, and TNF-α compared to the BCG+KLN205 WT mice group. Finally, NOX4 silencing mitigated the malignant potential of A549 cells that was enhanced by tuberculous pleural effusion and restored autophagy signaling. Our results suggest that the NOX4–autophagy axis regulated by tuberculous fibrosis could result in enhanced tumorigenic potential and that NOX4-P62 might serve as a target for tuberculous fibrosis-induced lung cancer.
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Crosstalk between pleural mesothelial cell and lung fibroblast contributes to pulmonary fibrosis. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2020; 1867:118806. [PMID: 32739525 DOI: 10.1016/j.bbamcr.2020.118806] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2019] [Revised: 07/17/2020] [Accepted: 07/28/2020] [Indexed: 12/12/2022]
Abstract
Idiopathic pulmonary fibrosis (IPF) is a specific form of chronic, progressive and fibrosing interstitial pneumonia of unknown cause. The main feature of IPF is a heterogeneous appearance with areas of sub-pleural fibrosis. However, the mechanism of sub-pleural fibrosis was poorly understood. In this study, our in vivo study revealed that pleural mesothelial cells (PMCs) migrated into lung parenchyma and localized alongside lung fibroblasts in sub-pleural area in mouse pulmonary fibrosis. Our in vitro study displayed that cultured-PMCs-medium induced lung fibroblasts transforming into myofibroblast, cultured-fibroblasts-medium promoted mesothelial-mesenchymal transition of PMCs. Furthermore, these changes in lung fibroblasts and PMCs were prevented by blocking TGF-β1/Smad2/3 signaling with SB431542. TGF-β1 neutralized antibody attenuated bleomycin-induced pulmonary fibrosis. Similar to TGF-β1/Smad2/3 signaling, wnt/β-catenin signaling was also activated in the process of PMCs crosstalk with lung fibroblasts. Moreover, inhibition of CD147 attenuated cultured-PMCs-medium induced collagen-I synthesis in lung fibroblasts. Blocking CD147 signaling also prevented bleomycin-induced pulmonary fibrosis. Our data indicated that crosstalk between PMC and lung fibroblast contributed to sub-pleural pulmonary fibrosis. TGF-β1, Wnt/β-catenin and CD147 signaling was involved in the underling mechanism.
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Feng R, Du W, Lui P, Zhang J, Liu Y. CAPN2 acts as an indicator of hepatitis B virus to induce hepatic fibrosis. J Cell Biochem 2019; 121:2428-2436. [PMID: 31680308 DOI: 10.1002/jcb.29465] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2018] [Accepted: 03/15/2019] [Indexed: 12/16/2022]
Abstract
This study is aimed to investigate whether calpain 2 (CAPN2) serves as an indicator of the hepatitis B virus (HBV) to induce hepatic fibrosis. Differentially-expressed genes (DEGs) in HBV-induced hepatic fibrosis and normal liver tissues were analyzed, and signal pathway which was analyzed by the Kyoto Encyclopedia of Genes and Genomes (KEGG) analysis using DEGs. Next, the gene-related network map was constructed using the Search Tool for the Retrieval of Interacting Genes. Moreover, CAPN2 protein expression, level of hepatic fibrosis, CAPN2 messenger RNA level, and protein levels of CAPN2, a-SAM, COL3A1, COL1A1, and MAPK1 were determined using Immunohistochemistry (IHC), hematoxylin and eosin, RT-qPCR, and western blot (WB), respectively. There were 420 DEGs screened in HBV-induced hepatic fibrosis and normal liver tissues, among which, 373 were significantly upregulated and 47 were obviously downregulated. KEGG analysis showed that the upregulated DEGs were mainly concentrated in extracellular matrix-receptor interaction, protein digestion, and absorption signaling pathways. The network diagram analysis showed that the DEGs, such as CAPN2, ITGAV, and CCR2, play the key role in the DEG network map, and CAPN2 related to hepatic fibrosis via MAPK1. The increased CAPN2 expression and obvious hepatic fibrosis was displayed in the HBV-induced hepatic fibrosis tissues. In addition, HBV could induce CAPN2 expression, and the interference of CAPN2 could inhibit the expression of hepatic fibrosis markers, including a-SAM, COL3A1, COL1A1, and MAPK1. CAPN2 is regarded as a biomarker of hepatic fibrosis induced by HBV.
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Affiliation(s)
- Rui Feng
- Department of Infectious Diseases, Renmin Hospital, Hubei University of Medicine, Shiyan, China
| | - Weixing Du
- Department of Infectious Diseases, Renmin Hospital, Hubei University of Medicine, Shiyan, China
| | - Ping Lui
- Department of Infectious Diseases, Renmin Hospital, Hubei University of Medicine, Shiyan, China
| | - Jun Zhang
- Department of Oncology, Renmin Hospital, Hubei University of Medicine, Shiyan, China
| | - Yanqing Liu
- Department of Infectious Diseases, Renmin Hospital, Hubei University of Medicine, Shiyan, China
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9
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miR-4739 mediates pleural fibrosis by targeting bone morphogenetic protein 7. EBioMedicine 2019; 41:670-682. [PMID: 30850350 PMCID: PMC6443597 DOI: 10.1016/j.ebiom.2019.02.057] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2018] [Revised: 02/20/2019] [Accepted: 02/26/2019] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Pleural fibrosis is defined as excessive depositions of matrix components that result in pleural tissue architecture destruction and dysfunction. In severe cases, the progression of pleural fibrosis leads to lung entrapment, resulting in dyspnea and respiratory failure. However, the mechanism of pleural fibrosis is poorly understood. METHODS miR-4739 levels were detected by miRNA array and real-time PCR. Real-time PCR, western blotting and immunofluorescence were used to identify the expression profile of indicators related to fibrosis. Target gene of miR-4739 and promoter activity assay was measured by using dual-luciferase reporter assay system. In vivo, pleural fibrosis was evaluated by Masson staining and miR-4739 level was detected by In situ hybridization histochemistry. FINDINGS We found that bleomycin induced up-regulation of miR-4739 in pleural mesothelial cells (PMCs). Over-regulated miR-4739 mediated mesothelial-mesenchymal transition and increased collagen-I synthesis in PMCs. Investigation on the clinical specimens revealed that high levels of miR-4739 and low levels of bone morphogenetic protein 7 (BMP-7) associated with pleural fibrosis in patients. Then we next identified that miR-4739 targeted and down-regulated BMP-7 which further resulted in unbalance between Smad1/5/9 and Smad2/3 signaling. Lastly, in vivo studies revealed that miR-4739 over-expression induced pleural fibrosis, and exogenous BMP-7 prevented pleural fibrosis in mice. INTERPRETATION Our data indicated that miR-4739 targets BMP-7 which mediates pleural fibrosis. The miR-4739/BMP-7 axis is a promising therapeutic target for the disease. FUND: The National Natural Science Foundation of China.
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10
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Kim Y, Park SY, Jung H, Noh YS, Lee JJ, Hong JY. Inhibition of NADPH Oxidase 4 (NOX4) Signaling Attenuates Tuberculous Pleural Fibrosis. J Clin Med 2019; 8:jcm8010116. [PMID: 30669315 PMCID: PMC6351931 DOI: 10.3390/jcm8010116] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2018] [Revised: 01/15/2019] [Accepted: 01/15/2019] [Indexed: 02/06/2023] Open
Abstract
Nicotinamide adenine dinucleotide phosphate (NADPH) oxidase [NOX] enzymes serve several hemostatic and host defense functions in various lung diseases, but the role of NOX4 signaling in tuberculous pleurisy is not well understood. The role of NOX4 signaling in tuberculous pleural fibrosis was studied using invitro pleural mesothelial cell (PMC) experiments and a murine model of Mycobacterium bovis bacillus Calmette–Guérin (BCG) pleural infection. The production of NOX4 reactive oxygen species (NOX4–ROS) and the epithelial mesenchymal transition (EMT) in PMCs were both induced by heat-killed mycobacterium tuberculosis (HKMT). In cultured PMCs, HKMT-induced collagen-1 synthesis and EMT were blocked by pretreatment with small interfering RNA (siRNA) NOX4. Moreover, NOX4–ROS production and subsequent fibrosis were reduced by treatment with losartan and the toll-like receptor 4 (TLR4) inhibitor TAK-242. The HKMT-induced EMT and intracellular ROS production were mediated by NOX4 via the activation of extracellular signal-regulated kinase (ERK) signaling. Finally, in a BCG-induced pleurisy model, recruitment of inflammatory pleural cells, release of inflammatory cytokines, and thickened mesothelial fibrosis were attenuated by SiNOX4 compared to SiCon. Our study identified that HKMT-induced pleural fibrosis is mediated by NOX4–ERK–ROS via TLR4 and Angiotensin II receptor type1 (AT1R). There results suggest that NOX4 may be a novel therapeutic target for intervention in tuberculous pleural fibrosis.
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Affiliation(s)
- Youngmi Kim
- Institute of New frontier Research, Hallym University College of Medicine, Chuncheon 24253, Korea.
| | - So Yeong Park
- Institute of New frontier Research, Hallym University College of Medicine, Chuncheon 24253, Korea.
| | - Harry Jung
- Institute of New frontier Research, Hallym University College of Medicine, Chuncheon 24253, Korea.
| | - You Sun Noh
- Institute of New frontier Research, Hallym University College of Medicine, Chuncheon 24253, Korea.
| | - Jae Jun Lee
- Institute of New frontier Research, Hallym University College of Medicine, Chuncheon 24253, Korea.
| | - Ji Young Hong
- Institute of New frontier Research, Hallym University College of Medicine, Chuncheon 24253, Korea.
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Internal Medicine, Chuncheon Sacred Heart Hospital, Hallym University Medical Center, Chuncheon 24235, Korea.
- Lung Research Institute of Hallym University College of Medicine, Chuncheon 24253, Korea.
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11
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BAYIR YASIN, UN HARUN, CADIRCI ELIF, AKPINAR EROL, DIYARBAKIR BUSRA, CALIK ILKNUR, HALICI ZEKAI. Effects of Aliskiren, an RAAS inhibitor, on a carrageenan-induced pleurisy model of rats. ACTA ACUST UNITED AC 2019; 91:e20180106. [DOI: 10.1590/0001-3765201820180106] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2018] [Accepted: 05/15/2018] [Indexed: 02/07/2023]
Affiliation(s)
| | - HARUN UN
- Agri Ibrahim Cecen University Campus, Turkey
| | | | | | | | - ILKNUR CALIK
- Erzurum Region Education and Research Hospital, Turkey
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12
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Hong JY, Park SY, Kim Y, Lee CY, Lee MG. Calpain and spectrin breakdown products as potential biomarkers in tuberculous pleural effusion. J Thorac Dis 2018; 10:2558-2566. [PMID: 29997916 DOI: 10.21037/jtd.2018.04.85] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Background Early diagnosis of tuberculous pleural effusion (TPE) remains difficult. Calpain is a family of calcium-dependent endopeptidase that plays an important role in extracellular matrix (ECM) remodeling and collagen synthesis. The aim of this study was to explore the diagnostic value of pleural fluid angiotensin-converting enzyme (ACE), calpain-1, spectrin breakdown products (SBDP), and matrix metalloproteinase-1 (MMP-1) in TPE and malignant pleural effusion (MPE). Methods The study included 47 patients with TPE, 28 patients with MPE, and 10 patients with transudate of non-tuberculous and non-malignant origin as controls. Calpain-1, ACE, SBDP, and MMP-1 levels in pleural fluid were measured by the ELISA method. Results ACE, calpain-1, SBDP, and MMP-1 levels were higher in TPE than MPE and transudate (all, P<0.05). On multivariate logistic regression analysis, adenosine deaminase (ADA) ≥40 IU/mL, calpain-1 ≥787 ng/mL, and SBDP ≥2.745 ng/mL were independent factors associated with TPE. The predicted probability of TPE based on these three predictors had an area under the receiver operating characteristic (ROC) curve of 0.985, with 97.9% sensitivity and 86.6% specificity under a cut-off value of 0.326. In patients with TPE, residual pulmonary thickening (RPT) was associated with significantly higher calpain-1, SBDP, and MMP-1 levels (all, P<0.05) versus cases without RPT. Conclusions Our results suggest that the overproduction of calpain-1 and SBDP is associated with pleural fibrosis in tuberculous pleurisy. While ADA is a conventional marker for diagnostic TPE, the simultaneous measurement of calpain-1 and SBDP l in pleural fluid may improve the diagnostic efficacy.
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Affiliation(s)
- Ji Young Hong
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Internal Medicine, Chuncheon Sacred Heart Hospital, Hallym University Medical Center, Chuncheon, Gangwon-do, Republic of Korea.,Lung Research Institute, Hallym University College of Medicine, Chuncheon, Gangwon-do, Republic of Korea.,Institute of New Frontier Research, Hallym University College of Medicine, Chuncheon, Gangwon-do, Republic of Korea
| | - So Yeong Park
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Internal Medicine, Chuncheon Sacred Heart Hospital, Hallym University Medical Center, Chuncheon, Gangwon-do, Republic of Korea.,Institute of New Frontier Research, Hallym University College of Medicine, Chuncheon, Gangwon-do, Republic of Korea
| | - Youngmi Kim
- Institute of New Frontier Research, Hallym University College of Medicine, Chuncheon, Gangwon-do, Republic of Korea
| | - Chang Youl Lee
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Internal Medicine, Chuncheon Sacred Heart Hospital, Hallym University Medical Center, Chuncheon, Gangwon-do, Republic of Korea.,Lung Research Institute, Hallym University College of Medicine, Chuncheon, Gangwon-do, Republic of Korea
| | - Myung Goo Lee
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Internal Medicine, Chuncheon Sacred Heart Hospital, Hallym University Medical Center, Chuncheon, Gangwon-do, Republic of Korea.,Lung Research Institute, Hallym University College of Medicine, Chuncheon, Gangwon-do, Republic of Korea
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13
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Song LJ, Xiang F, Ye H, Huang H, Yang J, Yu F, Xiong L, Xu JJ, Greer PA, Shi HZ, Xin JB, Su Y, Ma WL. Inhibition of angiotensin II and calpain attenuates pleural fibrosis. Pulm Pharmacol Ther 2017; 48:46-52. [PMID: 29107090 DOI: 10.1016/j.pupt.2017.10.012] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/07/2017] [Revised: 08/30/2017] [Accepted: 10/24/2017] [Indexed: 11/26/2022]
Abstract
Pleural fibrosis is associated with various inflammatory processes such as tuberculous pleurisy and bacterial empyema. There is currently no ideal therapeutic to attenuate pleural fibrosis. Some pro-fibrogenic mediators induce fibrosis through inflammatory processes, suggesting that blockage of these mediators might prevent pleural fibrosis. The MeT-5A human pleural mesothelial cell line (PMC) was used in this study as an in vitro model of fibrosis; and intra-pleural injection of bleomycin with carbon particles was used as an in vivo mouse model of pleural fibrosis. Calpain knockout mice, calpain inhibitor (calpeptin), and angiotensin (Ang) II type 1 receptor (AT1R) antagonist (losartan) were evaluated in prevention of experimental pleural fibrosis. We found that bleomycin and carbon particles induced calpain activation in cultured PMCs. This in vitro response was associated with increased collagen-I synthesis, and was blocked by calpain inhibitor or AT1R antagonist. Calpain genetic or treatment with calpeptin or losartan prevented pleural fibrosis in a mouse model induced by bleomycin and carbon particles. Our findings indicate that Ang II signaling and calpain activation induce collagen-I synthesis and contribute to fibrotic alterations in pleural fibrosis. Inhibition of Ang II and calpain might therefore be a novel strategy in treatment of pleural fibrosis.
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Affiliation(s)
- Lin-Jie Song
- Department of Respiratory and Critical Care Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Fei Xiang
- Department of Respiratory and Critical Care Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Hong Ye
- Department of Pathophysiology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China; Key Laboratory of Respiratory Diseases, Ministry of Health of China, Wuhan 430030, China
| | - Hai Huang
- Department of Internal Medicine, Wuhan Institute of Tuberculosis Prevention and Control, Wuhan 430030, China
| | - Jie Yang
- Department of Respiratory and Critical Care Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Fan Yu
- Department of Respiratory and Critical Care Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Liang Xiong
- Department of Respiratory and Critical Care Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Juan-Juan Xu
- Department of Respiratory and Critical Care Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Peter A Greer
- Queen's University Cancer Research Institute, Kingston, Ontario K7L 3N6, Canada
| | - Huan-Zhong Shi
- Department of Respiratory and Critical Care Medicine, Beijing Chaoyang Hospital, Capital Medical University, Beijing 100020, China
| | - Jian-Bao Xin
- Department of Respiratory and Critical Care Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China; Key Laboratory of Respiratory Diseases, Ministry of Health of China, Wuhan 430030, China
| | - Yunchao Su
- Department of Pharmacology and Toxicology, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA.
| | - Wan-Li Ma
- Department of Respiratory and Critical Care Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China; Key Laboratory of Respiratory Diseases, Ministry of Health of China, Wuhan 430030, China.
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14
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Kumar V, Ahmad A. Targeting calpains: A novel immunomodulatory approach for microbial infections. Eur J Pharmacol 2017; 814:28-44. [PMID: 28789934 DOI: 10.1016/j.ejphar.2017.08.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2017] [Revised: 08/01/2017] [Accepted: 08/03/2017] [Indexed: 02/09/2023]
Abstract
Calpains are a family of Ca2+ dependent cytosolic non-lysosomal proteases with well conserved cysteine-rich domains for enzymatic activity. Due to their functional dependency on Ca2+ concentrations, they are involved in various cellular processes that are regulated by intracellular ca2+ concentration (i.e. embryo development, cell development and migration, maintenance of cellular architecture and structure etc.). Calpains are widely studied proteases in mammalian (i.e. mouse and human) physiology and pathophysiology due to their ubiquitous presence. For example, these proteases have been found to be involved in various inflammatory disorders such as neurodegeneration, cancer, brain and myocardial ischemia and infarction, cataract and muscular dystrophies etc. Besides their role in these sterile inflammatory conditions, calpains have also been shown to regulate a wide range of infectious diseases (i.e. sepsis, tuberculosis, gonorrhoea and bacillary dysentery etc.). One of these regulatory mechanisms mediated by calpains (i.e. calpain 1 and 2) during microbial infections involves the regulation of innate immune response, inflammation and cell death. Thus, the major emphasis of this review is to highlight the importance of calpains in the pathogenesis of various microbial (i.e. bacterial, fungal and viral) diseases and the use of calpain modulators as potential immunomodulators in microbial infections.
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Affiliation(s)
- Vijay Kumar
- Department of Paediatrics and Child Health, Children's Health Queensland Clinical Unit, School of Medicine, University of Queensland, Brisbane, Queensland, Australia.
| | - Ali Ahmad
- Laboratory of innate immunity, CHU Ste-Justine Research Center/Department of Microbiology, Infectious Diseases and Immunology, University of Montreal, 3175 Cote Ste Catherine, Montreal, Quebec, Canada H3T 1C5.
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15
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Lam A, Prabhu R, Gross CM, Riesenberg LA, Singh V, Aggarwal S. Role of apoptosis and autophagy in tuberculosis. Am J Physiol Lung Cell Mol Physiol 2017; 313:L218-L229. [PMID: 28495854 DOI: 10.1152/ajplung.00162.2017] [Citation(s) in RCA: 112] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2017] [Revised: 05/03/2017] [Accepted: 05/03/2017] [Indexed: 01/08/2023] Open
Abstract
Tuberculosis (TB) is one of the oldest known human diseases and is transmitted by the bacteria Mycobacterium tuberculosis (Mtb). TB has a rich history with evidence of TB infections dating back to 5,800 bc TB is unique in its ability to remain latent in an individual for decades, with the possibility of later reactivation, causing widespread systemic symptoms. Currently, it is estimated that more than one-third of the world's population (~2 billion people) are infected with Mtb. Prolonged periods of therapy and complexity of treatment regimens, especially in active infection, have led to poor compliance in patients being treated for TB. Therefore, it is vitally important to have a thorough knowledge of the pathophysiology of Mtb to understand the disease progression, as well as to develop novel diagnostic tests and treatments. Alveolar macrophages represent both the primary host cell and the first line of defense against the Mtb infection. Apoptosis and autophagy of macrophages play a vital role in the pathogenesis and also in the host defense against Mtb. This review will outline the role of these two cellular processes in defense against Mtb with particular emphasis on innate immunity and explore developing therapies aimed at altering host responses to the disease.
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Affiliation(s)
- Adam Lam
- Department of Anesthesiology and Perioperative Medicine, University of Alabama at Birmingham, Birmingham, Alabama; and
| | - Rohan Prabhu
- Department of Anesthesiology and Perioperative Medicine, University of Alabama at Birmingham, Birmingham, Alabama; and
| | | | - Lee Ann Riesenberg
- Department of Anesthesiology and Perioperative Medicine, University of Alabama at Birmingham, Birmingham, Alabama; and
| | - Vinodkumar Singh
- Department of Anesthesiology and Perioperative Medicine, University of Alabama at Birmingham, Birmingham, Alabama; and
| | - Saurabh Aggarwal
- Department of Anesthesiology and Perioperative Medicine, University of Alabama at Birmingham, Birmingham, Alabama; and
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16
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Zhang Q, Ye H, Xiang F, Song LJ, Zhou LL, Cai PC, Zhang JC, Yu F, Shi HZ, Su Y, Xin JB, Ma WL. miR-18a-5p Inhibits Sub-pleural Pulmonary Fibrosis by Targeting TGF-β Receptor II. Mol Ther 2017; 25:728-738. [PMID: 28131417 DOI: 10.1016/j.ymthe.2016.12.017] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2016] [Revised: 12/04/2016] [Accepted: 12/12/2016] [Indexed: 11/18/2022] Open
Abstract
Idiopathic pulmonary fibrosis (IPF) is a chronic progressive lung disease that typically leads to respiratory failure and death within 3-5 years of diagnosis. Sub-pleural pulmonary fibrosis is a pathological hallmark of IPF. Bleomycin treatment of mice is a an established pulmonary fibrosis model. We recently showed that bleomycin-induced epithelial-mesenchymal transition (EMT) contributes to pleural mesothelial cell (PMC) migration and sub-pleural pulmonary fibrosis. MicroRNA (miRNA) expression has recently been implicated in the pathogenesis of IPF. However, changes in miRNA expression in PMCs and sub-pleural fibrosis have not been reported. Using cultured PMCs and a pulmonary fibrosis animal model, we found that miR-18a-5p was reduced in PMCs treated with bleomycin and that downregulation of miR-18a-5p contributed to EMT of PMCs. Furthermore, we determined that miR-18a-5p binds to the 3' UTR region of transforming growth factor β receptor II (TGF-βRII) mRNA, and this is associated with reduced TGF-βRII expression and suppression of TGF-β-Smad2/3 signaling. Overexpression of miR-18a-5p prevented bleomycin-induced EMT of PMC and inhibited bleomycin-induced sub-pleural fibrosis in mice. Taken together, our data indicate that downregulated miR-18a-5p mediates sub-pleural pulmonary fibrosis through upregulation of its target, TGF-βRII, and that overexpression of miR-18a-5p might therefore provide a novel approach to the treatment of IPF.
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Affiliation(s)
- Qian Zhang
- Department of Respiratory and Critical Care Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430022, China
| | - Hong Ye
- Department of Pathophysiology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, China; Key Laboratory of Pulmonary Diseases, Ministry of Health of China, Wuhan, Hubei 430030, China
| | - Fei Xiang
- Department of Respiratory and Critical Care Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430022, China; Key Laboratory of Pulmonary Diseases, Ministry of Health of China, Wuhan, Hubei 430030, China
| | - Lin-Jie Song
- Department of Respiratory and Critical Care Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430022, China
| | - Li-Ling Zhou
- Department of Respiratory and Critical Care Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430022, China
| | - Peng-Cheng Cai
- Department of Clinical Laboratory, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430022, China
| | - Jian-Chu Zhang
- Department of Respiratory and Critical Care Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430022, China; Key Laboratory of Pulmonary Diseases, Ministry of Health of China, Wuhan, Hubei 430030, China
| | - Fan Yu
- Department of Respiratory and Critical Care Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430022, China; Key Laboratory of Pulmonary Diseases, Ministry of Health of China, Wuhan, Hubei 430030, China
| | - Huan-Zhong Shi
- Department of Respiratory and Critical Care Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430022, China; Department of Respiratory and Critical Care Medicine, Beijing Chaoyang Hospital, Capital Medical University, Beijing 100020, China
| | - Yunchao Su
- Department of Pharmacology and Toxicology, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA
| | - Jian-Bao Xin
- Department of Respiratory and Critical Care Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430022, China; Key Laboratory of Pulmonary Diseases, Ministry of Health of China, Wuhan, Hubei 430030, China.
| | - Wan-Li Ma
- Department of Respiratory and Critical Care Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430022, China; Key Laboratory of Pulmonary Diseases, Ministry of Health of China, Wuhan, Hubei 430030, China.
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