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Dropmann A, Alex S, Schorn K, Tong C, Caccamo T, Godoy P, Ilkavets I, Liebe R, Gonzalez D, Hengstler JG, Piiper A, Quagliata L, Matter MS, Waidmann O, Finkelmeier F, Feng T, Weiss TS, Rahbari N, Birgin E, Rasbach E, Roessler S, Breuhahn K, Tóth M, Ebert MP, Dooley S, Hammad S, Meindl-Beinker NM. The TGF-β1 target WISP1 is highly expressed in liver cirrhosis and cirrhotic HCC microenvironment and involved in pro- and anti-tumorigenic effects. Biochem Biophys Res Commun 2024; 732:150409. [PMID: 39033550 DOI: 10.1016/j.bbrc.2024.150409] [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: 05/24/2024] [Revised: 07/10/2024] [Accepted: 07/15/2024] [Indexed: 07/23/2024]
Abstract
INTRODUCTION WNT1-inducible signalling pathway protein 1 (WISP1) promotes progression of several tumor entities often correlating with worse prognosis. Here its expression regulation and role in the progression of chronic liver diseases (CLD) was investigated. METHODS WISP1 expression was analyzed in human HCC datasets, in biopsies and serum samples and an HCC patient tissue microarray (TMA) including correlation to clinicopathological parameters. Spatial distribution of WISP1 expression was determined using RNAscope analysis. Regulation of WISP1 expression was investigated in cytokine-stimulated primary mouse hepatocytes (PMH) by array analysis and qRT-PCR. Outcome of WISP1 stimulation was analyzed by IncuCyte S3-live cell imaging, qRT-PCR, and immunoblotting in murine AML12 cells. RESULTS In a TMA, high WISP1 expression was positively correlated with early HCC stages and male sex. Highest WISP1 expression levels were detected in patients with cirrhosis as compared to healthy individuals, patients with early fibrosis, and non-cirrhotic HCC in liver biopsies, expression datasets and serum samples. WISP1 transcripts were predominantly detected in hepatocytes of cirrhotic rather than tumorous liver tissue. High WISP1 expression was associated with better survival. In PMH, AML12 and HepaRG, WISP1 was identified as a specific TGF-β1 target gene. Accordingly, expression levels of both cytokines positively correlated in human HCC patient samples. WISP1-stimulation induced the expression of Bcl-xL, PCNA and p21 in AML12 cells. CONCLUSIONS WISP1 expression is induced by TGF-β1 in hepatocytes and is associated with cirrhotic liver disease. We propose a crucial role of WISP1 in balancing pro- and anti-tumorigenic effects during premalignant stages of CLD.
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Affiliation(s)
- Anne Dropmann
- Department of Medicine II, Section Molecular Hepatology, Medical Faculty Mannheim, Heidelberg University, Theodor-Kutzer-Ufer 1-3, 68167, Mannheim, Germany
| | - Sophie Alex
- Department of Medicine II, Section Molecular Hepatology, Medical Faculty Mannheim, Heidelberg University, Theodor-Kutzer-Ufer 1-3, 68167, Mannheim, Germany
| | - Katharina Schorn
- Department of Medicine II, Section Molecular Hepatology, Medical Faculty Mannheim, Heidelberg University, Theodor-Kutzer-Ufer 1-3, 68167, Mannheim, Germany
| | - Chenhao Tong
- Department of Medicine II, Section Molecular Hepatology, Medical Faculty Mannheim, Heidelberg University, Theodor-Kutzer-Ufer 1-3, 68167, Mannheim, Germany
| | - Tiziana Caccamo
- Department of Medicine II, Section Molecular Hepatology, Medical Faculty Mannheim, Heidelberg University, Theodor-Kutzer-Ufer 1-3, 68167, Mannheim, Germany
| | - Patricio Godoy
- Department of Medicine II, Section Molecular Hepatology, Medical Faculty Mannheim, Heidelberg University, Theodor-Kutzer-Ufer 1-3, 68167, Mannheim, Germany; IfADo-Leibniz Research Centre for Working Environment and Human Factors, Technical University Dortmund, Ardeystr. 67, 44139, Dortmund, Germany
| | - Iryna Ilkavets
- Department of Medicine II, Section Molecular Hepatology, Medical Faculty Mannheim, Heidelberg University, Theodor-Kutzer-Ufer 1-3, 68167, Mannheim, Germany
| | - Roman Liebe
- Department of Medicine II, Section Molecular Hepatology, Medical Faculty Mannheim, Heidelberg University, Theodor-Kutzer-Ufer 1-3, 68167, Mannheim, Germany; Clinic of Gastroenterology, Hepatology and Infectious Diseases, Otto-von-Guericke-University, Leipziger Straße 44, 39120, Magdeburg, Germany
| | - Daniela Gonzalez
- IfADo-Leibniz Research Centre for Working Environment and Human Factors, Technical University Dortmund, Ardeystr. 67, 44139, Dortmund, Germany
| | - Jan G Hengstler
- IfADo-Leibniz Research Centre for Working Environment and Human Factors, Technical University Dortmund, Ardeystr. 67, 44139, Dortmund, Germany
| | - Albrecht Piiper
- Department of Internal Medicine 1, University Hospital Frankfurt, Goethe University, Theodor-Stern-Kai 7, 60596, Frankfurt am Main, Germany
| | - Luca Quagliata
- Institute of Pathology, University Hospital Basel, Schönbeinstrasse 40, 4031, Basel, Switzerland
| | - Matthias S Matter
- Institute of Pathology, University Hospital Basel, Schönbeinstrasse 40, 4031, Basel, Switzerland
| | - Oliver Waidmann
- Department of Internal Medicine 1, University Hospital Frankfurt, Goethe University, Theodor-Stern-Kai 7, 60596, Frankfurt am Main, Germany
| | - Fabian Finkelmeier
- Department of Internal Medicine 1, University Hospital Frankfurt, Goethe University, Theodor-Stern-Kai 7, 60596, Frankfurt am Main, Germany
| | - Teng Feng
- Department of Medicine II, Section Molecular Hepatology, Medical Faculty Mannheim, Heidelberg University, Theodor-Kutzer-Ufer 1-3, 68167, Mannheim, Germany
| | - Thomas S Weiss
- Children's University Hospital (KUNO), Center for Liver Cell Research, University Hospital Regensburg, Josef-Engert-Straße 9, 93053, Regensburg, Germany
| | - Nuh Rahbari
- Department of Surgery and European Center of Angioscience (ECAS), Medical Faculty Mannheim, Heidelberg University, Theodor-Kutzer-Ufer 1-3, 68167, Mannheim, Germany; Department of General and Visceral Surgery, University Hospital Ulm, Albert-Einstein-Allee 23, 89081, Ulm, Germany
| | - Emrullah Birgin
- Department of Surgery and European Center of Angioscience (ECAS), Medical Faculty Mannheim, Heidelberg University, Theodor-Kutzer-Ufer 1-3, 68167, Mannheim, Germany; Department of General and Visceral Surgery, University Hospital Ulm, Albert-Einstein-Allee 23, 89081, Ulm, Germany
| | - Erik Rasbach
- Department of General and Visceral Surgery, University Hospital Ulm, Albert-Einstein-Allee 23, 89081, Ulm, Germany; Department of Surgery, Medical Faculty Mannheim, Universitätsmedizin Mannheim, Heidelberg University, Theodor-Kutzer-Ufer 1-3, 68167, Mannheim, Germany
| | - Stephanie Roessler
- Institute of Pathology, University Hospital Heidelberg, Medical Faculty, Heidelberg University, Im Neuenheimer Feld 224, 69120, Heidelberg, Germany
| | - Kai Breuhahn
- Institute of Pathology, University Hospital Heidelberg, Medical Faculty, Heidelberg University, Im Neuenheimer Feld 224, 69120, Heidelberg, Germany
| | - Marcell Tóth
- Institute of Pathology, University Hospital Heidelberg, Medical Faculty, Heidelberg University, Im Neuenheimer Feld 224, 69120, Heidelberg, Germany
| | - Matthias P Ebert
- Department of Medicine II, Medical Faculty Mannheim, Heidelberg University, Theodor-Kutzer-Ufer 1-3, 68167, Mannheim, Germany; DKFZ-Hector Cancer Institute at the University Medical Center, Im Neuenheimer Feld 280, 69120, Heidelberg, Germany; Molecular Medicine Partnership Unit, European Molecular Biology Laboratory, Meyerhofstraße 1, 69117, Heidelberg, Germany
| | - Steven Dooley
- Department of Medicine II, Section Molecular Hepatology, Medical Faculty Mannheim, Heidelberg University, Theodor-Kutzer-Ufer 1-3, 68167, Mannheim, Germany
| | - Seddik Hammad
- Department of Medicine II, Section Molecular Hepatology, Medical Faculty Mannheim, Heidelberg University, Theodor-Kutzer-Ufer 1-3, 68167, Mannheim, Germany
| | - Nadja M Meindl-Beinker
- Department of Medicine II, Medical Faculty Mannheim, Heidelberg University, Theodor-Kutzer-Ufer 1-3, 68167, Mannheim, Germany.
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Christopoulou ME, Skandalis SS, Papakonstantinou E, Stolz D, Aletras AJ. WISP1 induces the expression of macrophage migration inhibitory factor in human lung fibroblasts through Src kinases and EGFR-activated signaling pathways. Am J Physiol Cell Physiol 2024; 326:C850-C865. [PMID: 38145300 PMCID: PMC11193488 DOI: 10.1152/ajpcell.00410.2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2023] [Revised: 12/18/2023] [Accepted: 12/18/2023] [Indexed: 12/26/2023]
Abstract
Wnt1-inducible signaling protein 1 (WISP1/CCN4) is a secreted matricellular protein that is implicated in lung and airway remodeling. The macrophage migration inhibitory factor (MIF) is a pleiotropic cytokine that has been associated with chronic lung diseases. In this study, we aimed to investigate the WISP1 signaling pathway and its ability to induce the expression of MIF in primary cultures of fibroblasts from normal human lungs (HLFs). Our results showed that WISP1 significantly stimulated the expression of MIF in a concentration- and time-dependent fashion. In WISP1-induced expression of MIF, αvβ5-integrin and chondroitin sulfate proteoglycans as well as Src tyrosine kinases, MAP kinases, phosphatidylinositol 3-kinase/Akt, PKC, and NF-κB were involved. WISP1-induced expression of MIF was attenuated in the presence of the Src kinase inhibitor PP2 or the MIF tautomerase activity inhibitor ISO-1. Moreover, WISP1 significantly increased the phosphorylation and activation of EGF receptor (EGFR) through transactivation by Src kinases. WISP1 also induced the expression of MIF receptor CD74 and coreceptor CD44, through which MIF exerts its effects on HLFs. In addition, it was found that MIF induced its own expression, as well as its receptors CD74/CD44, acting in an autocrine manner. Finally, WISP1-induced MIF promoted the expression of cyclooxygenase 2, prostaglandin E2, IL-6, and matrix metalloproteinase-2 demonstrating the regulatory role of WISP1-MIF axis in lung inflammation and remodeling involving mainly integrin αvβ5, Src kinases, PKC, NF-κB, and EGFR. The specific signaling pathways involved in WISP1-induced expression of MIF may prove to be excellent candidates for novel targets to control inflammation in chronic lung diseases.NEW & NOTEWORTHY The present study demonstrates for the first time that Wnt1-inducible signaling protein 1 (WISP1) regulates migration inhibitory factor (MIF) expression and activity and identifies the main signaling pathways involved. The newly discovered WISP1-MIF axis may drive lung inflammation and could result in the design of novel targeted therapies in inflammatory lung diseases.
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Affiliation(s)
- Maria-Elpida Christopoulou
- Laboratory of Biochemistry, Department of Chemistry, University of Patras, Patras, Greece
- Clinic of Pneumology, Medical Center-University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Spyros S Skandalis
- Laboratory of Biochemistry, Department of Chemistry, University of Patras, Patras, Greece
| | - Eleni Papakonstantinou
- Clinic of Pneumology, Medical Center-University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Daiana Stolz
- Clinic of Pneumology, Medical Center-University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Alexios J Aletras
- Laboratory of Biochemistry, Department of Chemistry, University of Patras, Patras, Greece
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Chang KS, Chen ST, Sung HC, Hsu SY, Lin WY, Hou CP, Lin YH, Feng TH, Tsui KH, Juang HH. WNT1 Inducible Signaling Pathway Protein 1 Is a Stroma-Specific Secreting Protein Inducing a Fibroblast Contraction and Carcinoma Cell Growth in the Human Prostate. Int J Mol Sci 2022; 23:ijms231911437. [PMID: 36232736 PMCID: PMC9570503 DOI: 10.3390/ijms231911437] [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: 08/24/2022] [Revised: 09/18/2022] [Accepted: 09/26/2022] [Indexed: 11/16/2022] Open
Abstract
The WNT1 inducible signaling pathway protein 1 (WISP1), a member of the connective tissue growth factor family, plays a crucial role in several important cellular functions in a highly tissue-specific manner. Results of a RT-qPCR indicated that WISP1 expressed only in cells of the human prostate fibroblasts, HPrF and WPMY-1, but not the prostate carcinoma cells in vitro. Two major isoforms (WISP1v1 and WISP1v2) were identified in the HPrF cells determined by RT-PCR and immunoblot assays. The knock-down of a WISP1 blocked cell proliferation and contraction, while treating respectively with the conditioned medium from the ectopic WISP1v1- and WISPv2-overexpressed 293T cells enhanced the migration of HPrF cells. The TNFα induced WISP1 secretion and cell contraction while the knock-down of WISP1 attenuated these effects, although TNFα did not affect the proliferation of the HPrF cells. The ectopic overexpression of WISP1v1 but not WISP1v2 downregulated the N-myc downstream regulated 1 (NDRG1) while upregulating N-cadherin, slug, snail, and vimentin gene expressions which induced not only the cell proliferation and invasion in vitro but also tumor growth of prostate carcinoma cells in vivo. The results confirmed that WISP1 is a stroma-specific secreting protein, enhancing the cell migration and contraction of prostate fibroblasts, as well as the proliferation, invasion, and tumor growth of prostate carcinoma cells.
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Affiliation(s)
- Kang-Shuo Chang
- Department of Anatomy, College of Medicine, Chang Gung University, Kwei-Shan, Taoyuan 33302, Taiwan
| | - Syue-Ting Chen
- Department of Anatomy, College of Medicine, Chang Gung University, Kwei-Shan, Taoyuan 33302, Taiwan
- Graduate Institute of Biomedical Sciences, College of Medicine, Chang Gung University, Kwei-Shan, Taoyuan 33302, Taiwan
- Department of Urology, Chang Gung Memorial Hospital-Linkou, Kwei-Shan, Taoyuan 33302, Taiwan
| | - Hsin-Ching Sung
- Department of Anatomy, College of Medicine, Chang Gung University, Kwei-Shan, Taoyuan 33302, Taiwan
- Graduate Institute of Biomedical Sciences, College of Medicine, Chang Gung University, Kwei-Shan, Taoyuan 33302, Taiwan
| | - Shu-Yuan Hsu
- Department of Anatomy, College of Medicine, Chang Gung University, Kwei-Shan, Taoyuan 33302, Taiwan
- Graduate Institute of Biomedical Sciences, College of Medicine, Chang Gung University, Kwei-Shan, Taoyuan 33302, Taiwan
| | - Wei-Yin Lin
- Department of Internal Medicine, Chang Gung Memorial Hospital-Linkou, Kwei-Shan, Taoyuan 33302, Taiwan
| | - Chen-Pang Hou
- Department of Urology, Chang Gung Memorial Hospital-Linkou, Kwei-Shan, Taoyuan 33302, Taiwan
| | - Yu-Hsiang Lin
- Department of Urology, Chang Gung Memorial Hospital-Linkou, Kwei-Shan, Taoyuan 33302, Taiwan
| | - Tsui-Hsia Feng
- School of Nursing, College of Medicine, Chang Gung University, Kwei-Shan, Taoyuan 33302, Taiwan
| | - Ke-Hung Tsui
- Department of Urology, Shuang Ho Hospital, New Taipei City 235041, Taiwan
- TMU Research Center of Urology and Kidney, Department of Medicine, College of Medicine, Taipei Medical University, Taipei 11031, Taiwan
- Correspondence: (K.-H.T.); (H.-H.J.); Tel.: +886-3-2118800 (ext. 5071) (H.-H.J.); Fax: +886-3-2118112 (H.-H.J.)
| | - Horng-Heng Juang
- Department of Anatomy, College of Medicine, Chang Gung University, Kwei-Shan, Taoyuan 33302, Taiwan
- Graduate Institute of Biomedical Sciences, College of Medicine, Chang Gung University, Kwei-Shan, Taoyuan 33302, Taiwan
- Department of Urology, Chang Gung Memorial Hospital-Linkou, Kwei-Shan, Taoyuan 33302, Taiwan
- Correspondence: (K.-H.T.); (H.-H.J.); Tel.: +886-3-2118800 (ext. 5071) (H.-H.J.); Fax: +886-3-2118112 (H.-H.J.)
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Zhang QN, Xiao H, Fang LT, Sun QX, Li LD, Xu SY, Li CQ. Aerosol inhalation of Mycobacterium vaccae ameliorates airway structural remodeling in chronic asthma mouse model. Exp Lung Res 2022; 48:239-250. [PMID: 36001552 DOI: 10.1080/01902148.2022.2115166] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Background: Airway remodeling is accepted to be a determining component within the natural history of asthma. Nebulized inhalation of Mycobacterium vaccae (M. vaccae) has a protective effect on asthmatic mice. However, little is known regarding the effect of M. vaccae on airway structural remodeling in asthmatic mice. The purpose of this study was to explore the effect and the underlying mechanism of M. vaccae aerosol inhalation on airway structural remodeling in an asthma mouse model. Methods: Chronic asthma mouse models were established by ovalbumin induction. The number of inflammatory cells in bronchoalveolar lavage fluid (BALF), pathological alterations in lung tissue, and levels of associated cytokines (IL-5, IL-13, TNF-α, and ovalbumin-specific immunoglobulin E [OVA-sIgE]) were all assessed after M. vaccae therapy. The relative expression of interleukin (IL)-1β, tumor necrosis factor-alpha (TNF-α), nuclear factor kappa B (NF-κB), and Wnt1-induced signaling protein 1 (WISP1) mRNA were detected. Western blotting and immunohistochemistry detected the expression of Wnt/β-catenin pathway-related proteins in lung tissue. Results: M. vaccae aerosol inhalation relieved airway inflammation, airway hyper-responsiveness, and airway remodeling. M. vaccae reduced the levels of IL-5, IL-13, TNF-α, and OVA-sIgE in and downregulated the expression of IL-1β, TNF-α, NF-κB, and WISP1 mRNA in the pulmonary. In addition, M. vaccae inhibited the expression of β-catenin, WISP1, and Wnt1 protein and upregulated the expression of glycogen synthase kinase-3beta (GSK-3β). Conclusion: Nebulized inhalation of M. vaccae can reduce airway remodeling during asthma.
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Affiliation(s)
- Qian-Nan Zhang
- Departments of Emergency, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Huan Xiao
- Departments of Emergency, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Li-Ting Fang
- Departments of Emergency, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Qi-Xiang Sun
- Department of Respiratory Medicine, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Lao-Dong Li
- Department of Respiratory Medicine, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Si-Yue Xu
- Department of Respiratory Medicine, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Chao-Qian Li
- Departments of Emergency, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
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Shan L, Liu S, Zhang Q, Zhou Q, Shang Y. Human bone marrow-mesenchymal stem cell-derived exosomal microRNA-188 reduces bronchial smooth muscle cell proliferation in asthma through suppressing the JARID2/Wnt/β-catenin axis. Cell Cycle 2022; 21:352-367. [PMID: 34974799 PMCID: PMC8855860 DOI: 10.1080/15384101.2021.2020432] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
The functions of exosomes in allergic diseases including asthma have aroused increasing concerns. This paper focuses on the effects of exosomes derived from human bone marrow-mesenchymal stem cells (hBM-MSCs) on the proliferation of bronchial smooth muscle cells in asthma and the mechanism involved. Exosomes were extracted from hBM-MSCs and identified. Human BSMCs were induced with transforming growth factor (TGF)-β1 to mimic an asthma-like condition in vitro and then treated with exosomes. A mouse model with asthma was induced by ovalbumin (OVA) and treated with exosomes for in vivo study. The hBM-MSC-derived exosomes significantly reduced the abnormal proliferation and migration of TGF-β1-treated BSMCs. microRNA (miR)-188 was the most enriched miRNA in exosomes according the microarray analysis, and JARID2 was identified as a mRNA target of miR-188. Either downregulation of miR-188 or upregulation of JARID2 blocked the protective effects of exosomes on BSMCs. JARID2 activated the Wnt/β-catenin signaling pathway. In the asthmatic mice, hBM-MSC-derived exosomes reduced inflammatory cell infiltration, mucus production, and collagen deposition in mouse lung tissues. In conclusion, this study suggestes that hBM-MSC-derived exosomes suppress proliferation of BSMCs and lung injury in asthmatic mice through the miR-188/JARID2/Wnt/β-catenin axis. This study may provide novel insights into asthma management.
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Affiliation(s)
- Lishen Shan
- Department of Pediatrics, Shengjing Hospital of China Medical University, Shenyang, P.R. China
| | - Si Liu
- Department of Pediatrics, Shengjing Hospital of China Medical University, Shenyang, P.R. China
| | - Qinzhen Zhang
- Department of Pediatrics, Shengjing Hospital of China Medical University, Shenyang, P.R. China
| | - Qianlan Zhou
- Department of Pediatrics, Shengjing Hospital of China Medical University, Shenyang, P.R. China
| | - Yunxiao Shang
- Department of Pediatrics, Shengjing Hospital of China Medical University, Shenyang, P.R. China,CONTACT Yunxiao Shang Department of Pediatrics, Shengjing Hospital of China Medical University, No. 36, San Hao Street, Heping District, Shenyang110004, Liaoning, P.R. China
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Bai SY, Li ML, Ren Y, Su XM. HDAC8-inhibitor PCI-34051-induced exosomes inhibit human bronchial smooth muscle cell proliferation via miR-381-3p mediated TGFB3. Pulm Pharmacol Ther 2021; 71:102096. [PMID: 34740750 DOI: 10.1016/j.pupt.2021.102096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/07/2021] [Revised: 10/18/2021] [Accepted: 10/29/2021] [Indexed: 10/19/2022]
Abstract
The present study aimed to investigate the effects of PCI-34051-induced human bronchial epithelial cells (HBECs)-derived exosomes (PCI-Exo) on human bronchial smooth muscle cells (HBSMCs) and the key exosomal miRNAs involved in this process. Blank exosomes (Exo) and PCI-Exo were extracted from HBECs treated with PBS and PCI-34051, respectively. RNA-sequencing was performed to uncover the miRNA expression profile affected by PCI-Exo. The MTT, flow cytometry and TUNEL assays were performed to reveal the effect of PCI-34051 and PCI-Exo on the proliferation and apoptosis of HBSMCs. Western blotting and qRT-PCR were used for detecting protein and mRNA expression. A total of 25 exosomal miRNAs consisted of 17 down-regulated and eight up-regulated miRNAs were differentially expressed among PCI-Exo and Exo. Target genes of the exosomal miRNAs were mainly associated with signal transduction, cell adhesion, microRNAs in cancer, and ECM receptor interaction. miR-381-3p was identified as the most significant upregulated differential miRNA in PCI-Exo after qRT-PCR validation and could be transferred to HBSMCs by PCI-Exo. PCI-Exo treatment inhibited the proliferation but induced the apoptosis of HBSMCs. TGFβ3 was identified as a target gene of miR-381-3p which could directly bind to the 3'UTR of TGFβ3 mRNA. After transfecting the miR-381-3p mimic into HBSMCs, the proliferation inhibition and apoptosis rate of HBSMCs was significantly increased, and siTGFβ3 transfection showed similar effects. Moreover, miR-381-3p overexpression could not only decrease the expression of α-SMA, FN1 and collagen I but also increase that of E-cadherin in HBSMCs. Our findings suggested that PCI-Exo could hinder the proliferation and obviously induce the apoptosis of HBSMCs, and its mechanisms might partly be attributable to the reduction of TGFβ3 level by up-regulating exosomal miR-381-3p expression. These results may be vital for the treatment of lung related-diseases, especially asthma.
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Affiliation(s)
- Shi-Yao Bai
- Department of Pulmonary and Critical Care Medicine, Institute of Respiratory Diseases, The First Affiliated Hospital of China Medical University, Shenyang, 110001, China
| | - Meng-Lu Li
- Department of Pulmonary and Critical Care Medicine, Institute of Respiratory Diseases, The First Affiliated Hospital of China Medical University, Shenyang, 110001, China
| | - Yuan Ren
- Department of Pulmonary and Critical Care Medicine, Institute of Respiratory Diseases, The First Affiliated Hospital of China Medical University, Shenyang, 110001, China
| | - Xin-Ming Su
- Department of Pulmonary and Critical Care Medicine, Institute of Respiratory Diseases, The First Affiliated Hospital of China Medical University, Shenyang, 110001, China.
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Sun C, Zhang H, Liu X. Emerging role of CCN family proteins in fibrosis. J Cell Physiol 2020; 236:4195-4206. [PMID: 33222181 DOI: 10.1002/jcp.30171] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2020] [Revised: 10/30/2020] [Accepted: 11/10/2020] [Indexed: 12/11/2022]
Abstract
Fibrosis is a common pathological change characterized by the excessive accumulation of fibrous connective tissue. Once uncontrolled, this pathological progress can lead to irreversible damage to the structure and function of organs, which is a serious threat to human health and life. Actually, the disability and death of patients caused by many chronic diseases have a closed relationship with fibrosis. The CCN protein family, including six members, is a small group of matrix proteins exhibiting structurally similar features. In the past 20 years, different biological functions of CCN proteins have been identified in various diseases. Of note, it has been recently shown that they are implicated in the key pathological process of fibrosis. In this review, we summarize the current status of knowledge regarding the role of CCN proteins involved in the pathogenesis of fibrosis diseases in detail. Furthermore, we highlight some of the underlying interaction mechanisms of CCN protein acting in fibrosis that helps to develop new drugs and determine appropriate clinical strategies for fibrotic diseases.
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Affiliation(s)
- Chao Sun
- Department of Spine Surgery, the Affiliated Jiangning Hospital with Nanjing Medical University, Nanjing, Jiangsu, China
| | - Han Zhang
- Department of Spine Surgery, the Affiliated Jiangning Hospital with Nanjing Medical University, Nanjing, Jiangsu, China
| | - Xinhui Liu
- Department of Spine Surgery, the Affiliated Jiangning Hospital with Nanjing Medical University, Nanjing, Jiangsu, China
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Guguen C, Launois C, Dormoy V, Dewolf M, Dumazet A, Dury S, Lebargy F, Deslee G, Perotin JM. [Obesity and asthma: Mechanisms and therapeutic options]. Rev Mal Respir 2019; 37:134-143. [PMID: 31864881 DOI: 10.1016/j.rmr.2019.03.015] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2018] [Accepted: 03/06/2019] [Indexed: 12/22/2022]
Abstract
Asthma and obesity are both common conditions, which lead to a substantial public health burden. The obese-asthma phenotype is characterized by poor asthma control, impaired lung function and decreased efficacy of inhaled treatment. However, this phenotype is highly heterogeneous and involves numerous mechanisms, including systemic inflammation and adipokines. A role for microbiota modifications and genetics has been suggested. Obese-asthma patient management currently consists in weight loss and usual anti-asthmatic treatment. New therapeutic options are being evaluated.
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Affiliation(s)
- C Guguen
- Service des maladies respiratoires, Inserm UMR-S 1250, CHU de Reims, 45, rue Cognacq-Jay, 51100 Reims, France
| | - C Launois
- Service des maladies respiratoires, Inserm UMR-S 1250, CHU de Reims, 45, rue Cognacq-Jay, 51100 Reims, France
| | - V Dormoy
- Service des maladies respiratoires, Inserm UMR-S 1250, CHU de Reims, 45, rue Cognacq-Jay, 51100 Reims, France
| | - M Dewolf
- Service des maladies respiratoires, Inserm UMR-S 1250, CHU de Reims, 45, rue Cognacq-Jay, 51100 Reims, France
| | - A Dumazet
- Service des maladies respiratoires, Inserm UMR-S 1250, CHU de Reims, 45, rue Cognacq-Jay, 51100 Reims, France
| | - S Dury
- Service des maladies respiratoires, Inserm UMR-S 1250, CHU de Reims, 45, rue Cognacq-Jay, 51100 Reims, France
| | - F Lebargy
- Service des maladies respiratoires, Inserm UMR-S 1250, CHU de Reims, 45, rue Cognacq-Jay, 51100 Reims, France
| | - G Deslee
- Service des maladies respiratoires, Inserm UMR-S 1250, CHU de Reims, 45, rue Cognacq-Jay, 51100 Reims, France
| | - J-M Perotin
- Service des maladies respiratoires, Inserm UMR-S 1250, CHU de Reims, 45, rue Cognacq-Jay, 51100 Reims, France.
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Vallée A, Vallée JN, Lecarpentier Y. Metabolic reprogramming in atherosclerosis: Opposed interplay between the canonical WNT/β-catenin pathway and PPARγ. J Mol Cell Cardiol 2019; 133:36-46. [PMID: 31153873 DOI: 10.1016/j.yjmcc.2019.05.024] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/02/2019] [Revised: 05/27/2019] [Accepted: 05/29/2019] [Indexed: 01/08/2023]
Abstract
Atherosclerosis, a chronic inflammatory and age-related disease, is a complex mechanism presenting a dysregulation of vessel structures. During this process, the canonical WNT/β-catenin pathway is increased whereas PPARγ is downregulated. The two systems act in an opposite manner. This paper reviews the opposing interplay of these systems and their metabolic-reprogramming pathway in atherosclerosis. Activation of the WNT/β-catenin pathway enhances the transcription of targets involved in inflammation, endothelial dysfunction, the proliferation of vascular smooth muscle cells, and vascular calcification. This complex mechanism, which is partly controlled by the WNT/β-catenin pathway, presents several metabolic dysfunctions. This phenomenon, called aerobic glycolysis (or the Warburg effect), consists of a shift in ATP production from mitochondrial oxidative phosphorylation to aerobic glycolysis, leading to the overproduction of intracellular lactate. This mechanism is partially due to the injury of mitochondrial respiration and an increase in the glycolytic pathway. In contrast, PPARγ agonists downregulate the WNT/β-catenin pathway. Therefore, the development of therapeutic targets, such as PPARγ agonists, for the treatment of atherosclerosis could be an interesting and innovative way of counteracting the canonical WNT pathway.
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Affiliation(s)
- Alexandre Vallée
- Diagnosis and Therapeutic Center, Hypertension and Cardiovascular Prevention Unit, Hotel-Dieu Hospital, AP-HP, Université Paris Descartes, Paris, France.
| | - Jean-Noël Vallée
- Centre Hospitalier Universitaire (CHU) Amiens Picardie, Université Picardie Jules Verne (UPJV), 80054 Amiens, France; Laboratoire de Mathématiques et Applications (LMA), UMR CNRS 7348, Université de Poitiers, Poitiers, France
| | - Yves Lecarpentier
- Centre de Recherche Clinique, Grand Hôpital de l'Est Francilien (GHEF), 6-8 rue Saint-fiacre, 77100 Meaux, France
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10
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Ding X, Tong Y, Jin S, Chen Z, Li T, Billiar TR, Pitt BR, Li Q, Zhang LM. Mechanical ventilation enhances extrapulmonary sepsis-induced lung injury: role of WISP1-αvβ5 integrin pathway in TLR4-mediated inflammation and injury. CRITICAL CARE : THE OFFICIAL JOURNAL OF THE CRITICAL CARE FORUM 2018; 22:302. [PMID: 30445996 PMCID: PMC6240278 DOI: 10.1186/s13054-018-2237-0] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/02/2018] [Accepted: 10/15/2018] [Indexed: 12/19/2022]
Abstract
Background High tidal volume ventilation of healthy lungs or exacerbation of existing acute lung injury (ALI) by more moderate mechanical ventilation (MTV) produces ventilator-induced lung injury. It is less clear whether extrapulmonary sepsis sensitizes the lung to MTV. Methods We used a two-hit model of cecal ligation and puncture (CLP) followed 12 h later by MTV (10 ml/kg; 6 h) to determine whether otherwise noninjurious MTV enhances CLP-induced ALI by contrasting wildtype and TLR4−/− mice with respect to: alveolar-capillary permeability, histopathology and intrapulmonary levels of WNT-inducible secreted protein 1 (WISP1) and integrin β5; plasma levels of cytokines and chemokines (TNF-α, IL-6, MIP-2, MCP-1) and intrapulmonary neutrophil infiltration; and other inflammatory signaling via intrapulmonary activation of JNK, p38 and ERK. A separate cohort of mice was pretreated with intratracheal neutralizing antibodies to WISP1, integrin β5 or IgG as control and the presented phenotyping repeated in a two-hit model; there were 10 mice per group in these first three experiments. Also, isolated peritoneal macrophages (PM) from wildtype and TLR4−/−, MyD88−/− and TRIF−/− mice were used to identify a WISP1–TLR4–integrin β5 pathway; and the requisite role of integrin β5 in WISP1-induced cytokine and chemokine production in LPS-primed PM was examined by siRNA treatment. Results MTV, that in itself did not cause ALI, exacerbated increases in alveolar-capillary permeability, histopathologic scoring and indices of pulmonary inflammation in mice that previously underwent CLP; the effects of this two-hit model were abrogated in TLR4−/− mice. Attendant with these findings was a significant increase in intrapulmonary WISP1 and integrin β5 in the two-hit model. Anti-WISP1 or anti-integrin β5 antibodies partially inhibited the two-hit phenotype. In PM, activation of TLR4 led to an increase in integrin β5 expression that was MyD88 and NF-κB dependent. Recombinant WISP1 increased LPS-induced cytokine release in PM that was inhibited by silencing either TLR4 or integrin β5. Conclusions These data show for the first time that otherwise noninjurious mechanical ventilation can exacerbate ALI due to extrapulmonary sepsis underscoring a potential interactive contribution of common events (sepsis and mechanical ventilation) in critical care, and that a WISP1–TLR4–integrin β5 pathway contributes to this phenomenon. Electronic supplementary material The online version of this article (10.1186/s13054-018-2237-0) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Xibing Ding
- Department of Anesthesiology, East Hospital, Tongji University School of Medicine, 150 Jimo Road, Pudong, Shanghai, China.,Department of Surgery, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA.,Department of Anesthesiology, University of Pittsburgh School of Medicine, 200 Lothrop St. UPMC MUH N467, Pittsburgh, 15213, PA, USA.,Department of Anesthesiology, Renji Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Yao Tong
- Department of Anesthesiology, East Hospital, Tongji University School of Medicine, 150 Jimo Road, Pudong, Shanghai, China
| | - Shuqing Jin
- Department of Anesthesiology, East Hospital, Tongji University School of Medicine, 150 Jimo Road, Pudong, Shanghai, China.,Department of Surgery, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Zhixia Chen
- Department of Anesthesiology, East Hospital, Tongji University School of Medicine, 150 Jimo Road, Pudong, Shanghai, China
| | - Tunliang Li
- Department of Anesthesiology, Xiangya 3rd Hospital, Central South University, Hunan, China.,Department of Surgery, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Timothy R Billiar
- Department of Surgery, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Bruce R Pitt
- Department of Environmental and Occupational Health, University of Pittsburgh Graduate School Public Health, Pittsburgh, PA, USA
| | - Quan Li
- Department of Anesthesiology, East Hospital, Tongji University School of Medicine, 150 Jimo Road, Pudong, Shanghai, China. .,Department of Anesthesiology, Cancer Hospital Chinese Academy of Medical Sciences, Shenzhen, China.
| | - Li-Ming Zhang
- Department of Anesthesiology, University of Pittsburgh School of Medicine, 200 Lothrop St. UPMC MUH N467, Pittsburgh, 15213, PA, USA.
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11
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Murgai M, Ju W, Eason M, Kline J, Beury DW, Kaczanowska S, Miettinen MM, Kruhlak M, Lei H, Shern JF, Cherepanova OA, Owens GK, Kaplan RN. KLF4-dependent perivascular cell plasticity mediates pre-metastatic niche formation and metastasis. Nat Med 2017; 23:1176-1190. [PMID: 28920957 PMCID: PMC5724390 DOI: 10.1038/nm.4400] [Citation(s) in RCA: 154] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2016] [Accepted: 08/10/2017] [Indexed: 12/13/2022]
Abstract
A deeper understanding of the metastatic process is required for the development of new therapies that improve patient survival. Metastatic tumor cell growth and survival in distant organs is facilitated by the formation of a pre-metastatic niche composed of hematopoietic cells, stromal cells, and extracellular matrix (ECM). Perivascular cells, including vascular smooth muscle cells (vSMCs) and pericytes, are involved in new vessel formation and in promoting stem cell maintenance and proliferation. Given the well-described plasticity of perivascular cells, we hypothesize that perivascular cells similarly regulate tumor cell fate at metastatic sites. Using perivascular cell-specific and pericyte-specific lineage-tracing models, we trace the fate of perivascular cells in the pre-metastatic and metastatic microenvironments. We show that perivascular cells lose the expression of traditional vSMC/pericyte markers in response to tumor-secreted factors and exhibit increased proliferation, migration, and ECM synthesis. Increased expression of the pluripotency gene Klf4 in these phenotypically-switched perivascular cells promotes a less differentiated state characterized by enhanced ECM production that establishes a pro-metastatic fibronectin-rich environment. Genetic inactivation of Klf4 in perivascular cells decreases pre-metastatic niche formation and metastasis. Our data reveal a previously unidentified role for perivascular cells in pre-metastatic niche formation and uncover novel strategies for limiting metastasis.
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Affiliation(s)
- Meera Murgai
- Pediatric Oncology Branch, Center for Cancer Research (CCR), National Cancer Institute (NCI), National Institutes of Health (NIH), Bethesda, Maryland, USA
| | - Wei Ju
- Pediatric Oncology Branch, Center for Cancer Research (CCR), National Cancer Institute (NCI), National Institutes of Health (NIH), Bethesda, Maryland, USA
| | - Matthew Eason
- Pediatric Oncology Branch, Center for Cancer Research (CCR), National Cancer Institute (NCI), National Institutes of Health (NIH), Bethesda, Maryland, USA
| | - Jessica Kline
- Pediatric Oncology Branch, Center for Cancer Research (CCR), National Cancer Institute (NCI), National Institutes of Health (NIH), Bethesda, Maryland, USA
| | - Daniel W Beury
- Pediatric Oncology Branch, Center for Cancer Research (CCR), National Cancer Institute (NCI), National Institutes of Health (NIH), Bethesda, Maryland, USA
| | - Sabina Kaczanowska
- Pediatric Oncology Branch, Center for Cancer Research (CCR), National Cancer Institute (NCI), National Institutes of Health (NIH), Bethesda, Maryland, USA
| | - Markku M Miettinen
- Laboratory of Pathology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, Maryland, USA
| | - Michael Kruhlak
- Experimental Immunology Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, Maryland, USA
| | - Haiyan Lei
- Pediatric Oncology Branch, Center for Cancer Research (CCR), National Cancer Institute (NCI), National Institutes of Health (NIH), Bethesda, Maryland, USA
| | - Jack F Shern
- Pediatric Oncology Branch, Center for Cancer Research (CCR), National Cancer Institute (NCI), National Institutes of Health (NIH), Bethesda, Maryland, USA
| | - Olga A Cherepanova
- Robert M. Berne Cardiovascular Research Center, School of Medicine, University of Virginia, Charlottesville, Virginia, USA.,Department of Molecular Physiology and Biological Physics, University of Virginia, Charlottesville, Virginia, USA
| | - Gary K Owens
- Robert M. Berne Cardiovascular Research Center, School of Medicine, University of Virginia, Charlottesville, Virginia, USA
| | - Rosandra N Kaplan
- Pediatric Oncology Branch, Center for Cancer Research (CCR), National Cancer Institute (NCI), National Institutes of Health (NIH), Bethesda, Maryland, USA
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12
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Koopmans T, Gosens R. Revisiting asthma therapeutics: focus on WNT signal transduction. Drug Discov Today 2017; 23:49-62. [PMID: 28890197 DOI: 10.1016/j.drudis.2017.09.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2017] [Revised: 07/20/2017] [Accepted: 09/01/2017] [Indexed: 12/16/2022]
Abstract
Asthma is a complex disease of the airways that develops as a consequence of both genetic and environmental factors. This interaction has highlighted genes important in early life, particularly those that control lung development, such as the Wingless/Integrase-1 (WNT) signalling pathway. Although aberrant WNT signalling is involved with an array of human conditions, it has received little attention within the context of asthma. Yet it is highly relevant, driving events involved with inflammation, airway remodelling, and airway hyper-responsiveness (AHR). In this review, we revisit asthma therapeutics by examining whether WNT signalling is a valid therapeutic target for asthma.
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Affiliation(s)
- Tim Koopmans
- Department of Molecular Pharmacology, University of Groningen, The Netherlands; Groningen Research Institute for Asthma and COPD (GRIAC), University of Groningen, The Netherlands
| | - Reinoud Gosens
- Department of Molecular Pharmacology, University of Groningen, The Netherlands; Groningen Research Institute for Asthma and COPD (GRIAC), University of Groningen, The Netherlands.
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13
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14
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Baarsma HA, Königshoff M. 'WNT-er is coming': WNT signalling in chronic lung diseases. Thorax 2017; 72:746-759. [PMID: 28416592 PMCID: PMC5537530 DOI: 10.1136/thoraxjnl-2016-209753] [Citation(s) in RCA: 127] [Impact Index Per Article: 18.1] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2016] [Revised: 03/01/2017] [Accepted: 03/16/2017] [Indexed: 02/06/2023]
Abstract
Chronic lung diseases represent a major public health problem with only limited therapeutic options. An important unmet need is to identify compounds and drugs that target key molecular pathways involved in the pathogenesis of chronic lung diseases. Over the last decade, there has been extensive interest in investigating Wingless/integrase-1 (WNT) signalling pathways; and WNT signal alterations have been linked to pulmonary disease pathogenesis and progression. Here, we comprehensively review the cumulative evidence for WNT pathway alterations in chronic lung pathologies, including idiopathic pulmonary fibrosis, pulmonary arterial hypertension, asthma and COPD. While many studies have focused on the canonical WNT/β-catenin signalling pathway, recent reports highlight that non-canonical WNT signalling may also significantly contribute to chronic lung pathologies; these studies will be particularly featured in this review. We further discuss recent advances uncovering the role of WNT signalling early in life, the potential of pharmaceutically modulating WNT signalling pathways and highlight (pre)clinical studies describing promising new therapies for chronic lung diseases.
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Affiliation(s)
- H A Baarsma
- Comprehensive Pneumology Center, Helmholtz Center Munich, Ludwig Maximilians University Munich, University Hospital Grosshadern, Member of the German Center for Lung Research (DZL), Munich, Germany
| | - M Königshoff
- Comprehensive Pneumology Center, Helmholtz Center Munich, Ludwig Maximilians University Munich, University Hospital Grosshadern, Member of the German Center for Lung Research (DZL), Munich, Germany.,Division of Pulmonary Sciences and Critical Care Medicine, Department of Medicine, University of Colorado School of Medicine, Aurora, Colorado, USA
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15
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Lu S, Liu H, Lu L, Wan H, Lin Z, Qian K, Yao X, Chen Q, Liu W, Yan J, Liu Z. WISP1 overexpression promotes proliferation and migration of human vascular smooth muscle cells via AKT signaling pathway. Eur J Pharmacol 2016; 788:90-97. [DOI: 10.1016/j.ejphar.2016.06.027] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2016] [Revised: 06/15/2016] [Accepted: 06/15/2016] [Indexed: 01/03/2023]
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16
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WISP1 mediates IL-6-dependent proliferation in primary human lung fibroblasts. Sci Rep 2016; 6:20547. [PMID: 26867691 PMCID: PMC4751539 DOI: 10.1038/srep20547] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2015] [Accepted: 11/20/2015] [Indexed: 12/12/2022] Open
Abstract
Idiopathic pulmonary fibrosis (IPF) is a progressive and fatal interstitial lung disease. IPF is characterized by epithelial cell injury and reprogramming, increases in (myo)fibroblasts, and altered deposition of extracellular matrix. The Wnt1-inducible signaling protein 1 (WISP1) is involved in impaired epithelial-mesenchymal crosstalk in pulmonary fibrosis. Here, we aimed to further investigate WISP1 regulation and function in primary human lung fibroblasts (phLFs). We demonstrate that WISP1 is directly upregulated by Transforming growth factor β1 (TGFβ1) and Tumor necrosis factor α (TNFα) in phLFs, using a luciferase-based reporter system. WISP1 mRNA and protein secretion increased in a time- and concentration-dependent manner by TGFβ1 and TNFα in phLFs, as analysed by qPCR and ELISA, respectively. Notably, WISP1 is required for TGFβ1- and TNFα-dependent induction of interleukin 6 (IL-6), a mechanism that is conserved in IPF phLFs. The siRNA-mediated WISP1 knockdown led to a significant IL-6 reduction after TGFβ1 or TNFα stimulation. Furthermore, siRNA-mediated downregulation or antibody-mediated neutralization of WISP1 reduced phLFs proliferation, a process that was in part rescued by IL-6. Taken together, these results strongly indicate that WISP1-induced IL-6 expression contributes to the pro-proliferative effect on fibroblasts, which is likely orchestrated by a variety of profibrotic mediators, including Wnts, TGFβ1 and TNFα.
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