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Petersson Sjögren M, Kåredal M, Broberg K, Assarsson E, Thuresson S, Dierschke K, Hedmer M, Rissler J, Wollmer P, Löndahl J. Sensitive methods for assessment of lung health in welders and controls. Respir Med 2023; 212:107244. [PMID: 37062499 DOI: 10.1016/j.rmed.2023.107244] [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: 11/11/2022] [Revised: 04/04/2023] [Accepted: 04/05/2023] [Indexed: 04/18/2023]
Abstract
BACKGROUND Welders are exposed to gas and particle emissions that can cause severe lung disease, such as chronic obstructive pulmonary disease (COPD), a leading cause of mortality and morbidity worldwide. It is hard to detect COPD early and therefore mitigating measures may be delayed. The aim of this study was to investigate lung health in welders and evaluate new sensitive methods with potential to assess early onset pulmonary changes in occupational settings. METHODS This study assessed the lung health and symptoms in active welders (n = 28) and controls (n = 17). Lung measurements were performed with standard spirometry and new methods: airspace dimension assessment (AiDA), oscillometry, blood serum biomarkers (club cell secretory protein 16, surfactant protein D, matrix metalloproteinases, fibroblast, hepatocyte growth factor, interleukins), and one urine biomarker (desmosine). RESULTS According to spirometry measurements, all participants had normal lung function. However, prevalence of cough was significantly higher among welders compared with controls and lung changes were found in welders with the novel methods. Welders had significantly higher respiratory system resistance assessed with oscillometry, serum levels of metalloproteinases 9 and hepatocyte growth factor, compared with controls. Airspace dimensions were on average higher among welders compared with controls, but the difference was not significant. The number of welding years correlated with decreased respiratory system reactance and increased serum levels of matrix metalloproteinases 9, interleukin 6, and hepatocyte growth factor. Airspace dimension assessment indices significantly correlated with increasing levels of inflammatory markers and matrix metalloproteinases. CONCLUSIONS This study indicated the potential to use new and more sensitive methods for identification of changes in lungs when standard spirometry failed to do so.
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Affiliation(s)
- Madeleine Petersson Sjögren
- Ergonomics and Aerosol Technology, Department of Design Sciences, Lund University, Lund, Sweden; NanoLund, Lund, Sweden
| | - Monica Kåredal
- NanoLund, Lund, Sweden; Division of Occupational and Environmental Medicine, Department of Laboratory Medicine, Lund University, Lund, Sweden; Department of Occupational and Environmental Medicine, Region Skåne, Lund, Sweden
| | - Karin Broberg
- Division of Occupational and Environmental Medicine, Department of Laboratory Medicine, Lund University, Lund, Sweden; Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Eva Assarsson
- Division of Occupational and Environmental Medicine, Department of Laboratory Medicine, Lund University, Lund, Sweden
| | - Sara Thuresson
- Ergonomics and Aerosol Technology, Department of Design Sciences, Lund University, Lund, Sweden; NanoLund, Lund, Sweden
| | - Katrin Dierschke
- Division of Occupational and Environmental Medicine, Department of Laboratory Medicine, Lund University, Lund, Sweden; Department of Occupational and Environmental Medicine, Region Skåne, Lund, Sweden
| | - Maria Hedmer
- NanoLund, Lund, Sweden; Division of Occupational and Environmental Medicine, Department of Laboratory Medicine, Lund University, Lund, Sweden; Department of Occupational and Environmental Medicine, Region Skåne, Lund, Sweden
| | - Jenny Rissler
- Ergonomics and Aerosol Technology, Department of Design Sciences, Lund University, Lund, Sweden; NanoLund, Lund, Sweden; RISE Research Institutes of Sweden, Borås, Sweden
| | - Per Wollmer
- Department of Translational Medicine, Clinical Physiology and Nuclear Medicine, Lund University, Malmö, Sweden
| | - Jakob Löndahl
- Ergonomics and Aerosol Technology, Department of Design Sciences, Lund University, Lund, Sweden; NanoLund, Lund, Sweden.
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2
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Nebulization Therapy with Umbilical Cord Mesenchymal Stem Cell-Derived Exosomes for COVID-19 Pneumonia. Stem Cell Rev Rep 2022; 18:2152-2163. [PMID: 35665467 PMCID: PMC9166932 DOI: 10.1007/s12015-022-10398-w] [Citation(s) in RCA: 38] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/16/2022] [Indexed: 12/28/2022]
Abstract
Background
Scientists have been facing numerous challenges in the development of an effective therapeutic strategy for the treatment of COVID-19 pneumonia. Several studies have suggested that improving patient immunity and reducing lung injury induced by SARS-CoV-2 may be effective for treating patients with COVID-19. Methods A pilot trial of nebulization therapy with exosomes of mesenchymal stem cells (MSCs) was performed on seven patients with COVID-19 pneumonia. Exosomes secreted from MSCs were collected and purified using multiple ultrafiltration steps. All patients were treated with nebulization of MSC-derived exosomes, and primary safety and efficacy outcomes were evaluated. Results Our clinical study demonstrated that nebulization of MSC-derived exosomes is a novel method that might be utilized in the treatment of COVID-19 pneumonia. Nebulization of MSC-derived exosomes did not induce acute allergic or secondary allergic reactions but did promote the absorption of pulmonary lesions and reduce the duration of hospitalization for mild cases of COVID-19 pneumonia. Conclusions Nebulization of MSC-derived exosomes is a safe, effective, and simple method, and their application at the beginning of treatment may be more beneficial. Trial Registration Chinese Clinical Trial Registry, ChiCTR2000030261. Registered on 26 February 2020. Graphical Abstract ![]()
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3
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Jing W, Wang H, Zhan L, Yan W. Extracellular Vesicles, New Players in Sepsis and Acute Respiratory Distress Syndrome. Front Cell Infect Microbiol 2022; 12:853840. [PMID: 35463634 PMCID: PMC9021632 DOI: 10.3389/fcimb.2022.853840] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2022] [Accepted: 03/14/2022] [Indexed: 11/15/2022] Open
Abstract
Sepsis refers to a complex syndrome associated with physiological, pathological, and biochemical abnormalities resulted from infection. Sepsis is the major cause of acute respiratory distress syndrome (ARDS). Extracellular vesicles (EVs) are serving as new messengers to mediate cell-cell communication in vivo. Non-coding RNAs, proteins and metabolites encapsulated by EVs could result in either pro-inflammatory or anti-inflammatory effects in the recipient cells. Pathogens or host cells derived EVs play an important role in pathogens infection during the occurrence and development of sepsis and ARDS. Additionally, we summarize the potential application for EVs in diagnosis, prevention and treatment for sepsis and ARDS.
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Affiliation(s)
- Wenqiang Jing
- Department of Critical Care Medicine, Renmin Hospital of Wuhan University, Hubei Key Laboratory of Cell Homeostasis, College of Life Sciences, Wuhan University, Wuhan, China
| | - Huijuan Wang
- Department of Critical Care Medicine, Renmin Hospital of Wuhan University, Wuhan, China
| | - Liying Zhan
- Department of Critical Care Medicine, Renmin Hospital of Wuhan University, Wuhan, China
- *Correspondence: Liying Zhan, ; Wei Yan,
| | - Wei Yan
- Department of Critical Care Medicine, Renmin Hospital of Wuhan University, Hubei Key Laboratory of Cell Homeostasis, College of Life Sciences, Wuhan University, Wuhan, China
- *Correspondence: Liying Zhan, ; Wei Yan,
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4
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Georgescu A, Simionescu M. Extracellular Vesicles: Versatile Nanomediators, Potential Biomarkers and Therapeutic Agents in Atherosclerosis and COVID-19-Related Thrombosis. Int J Mol Sci 2021; 22:5967. [PMID: 34073119 PMCID: PMC8198837 DOI: 10.3390/ijms22115967] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2021] [Revised: 05/28/2021] [Accepted: 05/28/2021] [Indexed: 02/06/2023] Open
Abstract
Cells convey information among one another. One instrument employed to transmit data and constituents to specific (target) cells is extracellular vesicles (EVs). They originate from a variety of cells (endothelial, immune cells, platelets, mesenchymal stromal cells, etc.), and consequently, their surface characteristics and cargo vary according to the paternal cell. The cargo could be DNA, mRNA, microRNA, receptors, metabolites, cytoplasmic proteins, or pathological molecules, as a function of which EVs exert different effects upon endocytosis in recipient cells. Recently, EVs have become important participants in a variety of pathologies, including atherogenesis and coronavirus disease 2019 (COVID-19)-associated thrombosis. Herein, we summarize recent advances and some of our own results on the role of EVs in atherosclerotic cardiovascular diseases, and discuss their potential to function as signaling mediators, biomarkers and therapeutic agents. Since COVID-19 patients have a high rate of thrombotic events, a special section of the review is dedicated to the mechanism of thrombosis and the possible therapeutic potential of EVs in COVID-19-related thrombosis. Yet, EV mechanisms and their role in the transfer of information between cells in normal and pathological conditions remain to be explored.
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Affiliation(s)
| | - Maya Simionescu
- Institute of Cellular Biology and Pathology ‘Nicolae Simionescu’ of the Romanian Academy, 050568 Bucharest, Romania;
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5
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Khalaj K, Figueira RL, Antounians L, Lauriti G, Zani A. Systematic review of extracellular vesicle-based treatments for lung injury: are EVs a potential therapy for COVID-19? J Extracell Vesicles 2020; 9:1795365. [PMID: 32944185 PMCID: PMC7481829 DOI: 10.1080/20013078.2020.1795365] [Citation(s) in RCA: 51] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Severe COVID-19 infection results in bilateral interstitial pneumonia, often leading to
acute respiratory distress syndrome (ARDS) and pulmonary fibrosis in survivors. Most
patients with severe COVID-19 infections who died had developed ARDS. Currently, ARDS is
treated with supportive measures, but regenerative medicine approaches including
extracellular vesicle (EV)-based therapies have shown promise. Herein, we aimed to analyse
whether EV-based therapies could be effective in treating severe pulmonary conditions that
affect COVID-19 patients and to understand their relevance for an eventual therapeutic
application to human patients. Using a defined search strategy, we conducted a systematic
review of the literature and found 39 articles (2014–2020) that reported effects of EVs,
mainly derived from stem cells, in lung injury models (one large animal study, none in
human). EV treatment resulted in: (1) attenuation of inflammation (reduction of
pro-inflammatory cytokines and neutrophil infiltration, M2 macrophage polarization); (2)
regeneration of alveolar epithelium (decreased apoptosis and stimulation of surfactant
production); (3) repair of microvascular permeability (increased endothelial cell junction
proteins); (4) prevention of fibrosis (reduced fibrin production). These effects were
mediated by the release of EV cargo and identified factors including miRs-126, −30b-3p,
−145, −27a-3p, syndecan-1, hepatocyte growth factor and angiopoietin-1. This review
indicates that EV-based therapies hold great potential for COVID-19 related lung injuries
as they target multiple pathways and enhance tissue regeneration. However, before
translating EV therapies into human clinical trials, efforts should be directed at
developing good manufacturing practice solutions for EVs and testing optimal dosage and
administration route in large animal models.
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Affiliation(s)
- Kasra Khalaj
- Developmental and Stem Cell Biology Program, Peter Gilgan Centre for Research and Learning, The Hospital for Sick Children, Toronto, Ontario, Canada.,Division of General and Thoracic Surgery, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Rebeca Lopes Figueira
- Developmental and Stem Cell Biology Program, Peter Gilgan Centre for Research and Learning, The Hospital for Sick Children, Toronto, Ontario, Canada.,Division of General and Thoracic Surgery, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Lina Antounians
- Developmental and Stem Cell Biology Program, Peter Gilgan Centre for Research and Learning, The Hospital for Sick Children, Toronto, Ontario, Canada.,Division of General and Thoracic Surgery, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Giuseppe Lauriti
- Department of Pediatric Surgery, Spirito Santo Hospital, Pescara, Italy.,Department of Medicine and Aging Sciences, G. D'Annunzio University, Chieti-Pescara, Italy
| | - Augusto Zani
- Developmental and Stem Cell Biology Program, Peter Gilgan Centre for Research and Learning, The Hospital for Sick Children, Toronto, Ontario, Canada.,Division of General and Thoracic Surgery, The Hospital for Sick Children, Toronto, Ontario, Canada
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6
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Wang L, Zhao Y, Yang F, Feng M, Zhao Y, Chen X, Mi J, Yao Y, Guan D, Xiao Z, Chen B, Dai J. Biomimetic collagen biomaterial induces in situ lung regeneration by forming functional alveolar. Biomaterials 2020; 236:119825. [PMID: 32044576 DOI: 10.1016/j.biomaterials.2020.119825] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2019] [Revised: 01/07/2020] [Accepted: 01/25/2020] [Indexed: 01/02/2023]
Abstract
In situ restoration of severely damaged lung remains difficult due to its limited regeneration capacity after injury. Artificial lung scaffolds are emerging as potential substitutes, but it is still a challenge to reconstruct lung regeneration microenvironment in scaffold after lung resection injury. Here, a 3D biomimetic porous collagen scaffold with similar structure characteristics as lung is fabricated, and a novel collagen binding hepatocyte growth factor (CBD-HGF) is tethered on the collagen scaffold for maintaining the biomimetic function of HGF to improve the lung regeneration microenvironment. The biomimetic scaffold was implanted into the operative region of a rat partial lung resection model. The results revealed that vascular endothelial cells and endogenous alveolar stem cells entered the scaffold at the early stage of regeneration. At the later stage, inflammation and fibrosis were attenuated, the microvascular and functional alveolar-like structures were formed, and the general morphology of the injured lung was restored. Taken together, the functional 3D biomimetic collagen scaffold facilitates recovery of the injured lung, alveolar regeneration, and angiogenesis after acute lung injury. Particularly, this is the first study of lung regeneration in vivo guided by biomimetic collagen scaffold materials, which supports the concept that tissue engineering is an effective strategy for alveolar regeneration.
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Affiliation(s)
- Linjie Wang
- Institute of Combined Injury, State Key Laboratory of Trauma, Burns and Combined Injury, Chongqing Engineering Research Center for Nanomedicine, College of Preventive Medicine, Chongqing Engineering Research Center for Biomaterials and Regenerative Medicine, Army Medical University (Third Military Medical University), Chongqing, 400038, China
| | - Yannan Zhao
- Institute of Combined Injury, State Key Laboratory of Trauma, Burns and Combined Injury, Chongqing Engineering Research Center for Nanomedicine, College of Preventive Medicine, Chongqing Engineering Research Center for Biomaterials and Regenerative Medicine, Army Medical University (Third Military Medical University), Chongqing, 400038, China; State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, 100101, China
| | - Feng Yang
- Institute of Combined Injury, State Key Laboratory of Trauma, Burns and Combined Injury, Chongqing Engineering Research Center for Nanomedicine, College of Preventive Medicine, Chongqing Engineering Research Center for Biomaterials and Regenerative Medicine, Army Medical University (Third Military Medical University), Chongqing, 400038, China
| | - Meng Feng
- Institute of Combined Injury, State Key Laboratory of Trauma, Burns and Combined Injury, Chongqing Engineering Research Center for Nanomedicine, College of Preventive Medicine, Chongqing Engineering Research Center for Biomaterials and Regenerative Medicine, Army Medical University (Third Military Medical University), Chongqing, 400038, China
| | - Yazhen Zhao
- Institute of Combined Injury, State Key Laboratory of Trauma, Burns and Combined Injury, Chongqing Engineering Research Center for Nanomedicine, College of Preventive Medicine, Chongqing Engineering Research Center for Biomaterials and Regenerative Medicine, Army Medical University (Third Military Medical University), Chongqing, 400038, China
| | - Xi Chen
- Institute of Combined Injury, State Key Laboratory of Trauma, Burns and Combined Injury, Chongqing Engineering Research Center for Nanomedicine, College of Preventive Medicine, Chongqing Engineering Research Center for Biomaterials and Regenerative Medicine, Army Medical University (Third Military Medical University), Chongqing, 400038, China
| | - Junwei Mi
- Institute of Combined Injury, State Key Laboratory of Trauma, Burns and Combined Injury, Chongqing Engineering Research Center for Nanomedicine, College of Preventive Medicine, Chongqing Engineering Research Center for Biomaterials and Regenerative Medicine, Army Medical University (Third Military Medical University), Chongqing, 400038, China
| | - Yuanjiang Yao
- Institute of Combined Injury, State Key Laboratory of Trauma, Burns and Combined Injury, Chongqing Engineering Research Center for Nanomedicine, College of Preventive Medicine, Chongqing Engineering Research Center for Biomaterials and Regenerative Medicine, Army Medical University (Third Military Medical University), Chongqing, 400038, China
| | - Dongwei Guan
- Institute of Combined Injury, State Key Laboratory of Trauma, Burns and Combined Injury, Chongqing Engineering Research Center for Nanomedicine, College of Preventive Medicine, Chongqing Engineering Research Center for Biomaterials and Regenerative Medicine, Army Medical University (Third Military Medical University), Chongqing, 400038, China
| | - Zhifeng Xiao
- Institute of Combined Injury, State Key Laboratory of Trauma, Burns and Combined Injury, Chongqing Engineering Research Center for Nanomedicine, College of Preventive Medicine, Chongqing Engineering Research Center for Biomaterials and Regenerative Medicine, Army Medical University (Third Military Medical University), Chongqing, 400038, China; State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, 100101, China
| | - Bing Chen
- Institute of Combined Injury, State Key Laboratory of Trauma, Burns and Combined Injury, Chongqing Engineering Research Center for Nanomedicine, College of Preventive Medicine, Chongqing Engineering Research Center for Biomaterials and Regenerative Medicine, Army Medical University (Third Military Medical University), Chongqing, 400038, China; State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, 100101, China.
| | - Jianwu Dai
- Institute of Combined Injury, State Key Laboratory of Trauma, Burns and Combined Injury, Chongqing Engineering Research Center for Nanomedicine, College of Preventive Medicine, Chongqing Engineering Research Center for Biomaterials and Regenerative Medicine, Army Medical University (Third Military Medical University), Chongqing, 400038, China; State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, 100101, China.
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7
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Zhang X, Guo Y, Yang J, Niu J, Du L, Li H, Li X. A functional variant alters binding of activating protein 1 regulating expression of FGF7 gene associated with chronic obstructive pulmonary disease. BMC MEDICAL GENETICS 2019; 20:33. [PMID: 30777021 PMCID: PMC6380023 DOI: 10.1186/s12881-019-0761-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/13/2018] [Accepted: 01/29/2019] [Indexed: 02/07/2023]
Abstract
Background Genome-wide association studies (GWASs) of a large cohort of subjects with chronic obstructive pulmonary disease (COPD) have successfully identified multiple risk genes, including fibroblast growth factor 7 (FGF7). However, the underlying molecular mechanism influencing function of FGF7 and risk of COPD remains further study. Methods In this study, we replicated the genetic association of variants near the FGF7 gene in 258 Chinese Han patients with COPD and 311 healthy controls. Additionally, we functionally evaluated a candidate causal variant upstream of the FGF7 gene. Results The most significant association was observed at rs12905203 (P = 5.9 × 10− 3, odd ratio, OR = 1.516) that explains associations of previously reported variants at the FGF7 locus. Electrophoretic mobility shift assay (EMSA) and chromatin immunoprecipitation-quantitative polymerase chain reaction (ChIP-qPCR) assays showed that the risk allele of the variant was bound to activator protein 1 transcription factors (c-Fos and c-Jun) with a significantly reduced affinity and associated with decreased mRNA expression of FGF7 in fibroblast cells at both resting and PMA/Ionomycin-stimulated conditions. Overexpression of c-Fos and c-Jun proteins or stimulation with PMA/Ionomycin significantly increases mRNA expression of FGF7 in fibroblast cells. Bioinformatic analysis showed that the variant overlaps with multiple genetic regulatory marks, suggesting the regulatory DNA element might function as an enhancer for the FGF7 gene. Luciferase enhancer activity assays demonstrated that the DNA sequences carrying the variant produce enhancer activity while the risk allele of the variant reduces its activity. Conclusions In this study, we demonstrated a consistent association of the FGF7 gene with COPD and mechanistically characterized a candidate functional variant upstream of the FGF7 gene. These data highlighted the important role of the risk variant and the FGF7 gene in influencing risk for COPD. Electronic supplementary material The online version of this article (10.1186/s12881-019-0761-7) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Xiaomei Zhang
- College of Life Science, Engineering Research Center of the Chinese Ministry of Education for Bioreactor and Pharmaceutical Development, Jilin Agricultural University, NO. 2888, XinCheng Avenue, Changchun, 130118, China.
| | - Yongxin Guo
- College of Life Science, Engineering Research Center of the Chinese Ministry of Education for Bioreactor and Pharmaceutical Development, Jilin Agricultural University, NO. 2888, XinCheng Avenue, Changchun, 130118, China
| | - Jing Yang
- College of Life Science, Engineering Research Center of the Chinese Ministry of Education for Bioreactor and Pharmaceutical Development, Jilin Agricultural University, NO. 2888, XinCheng Avenue, Changchun, 130118, China
| | - Jianlou Niu
- School of Pharmacy, Wenzhou Medical University, Chashan Avenue, Wenzhou, 325035, Zhejiang, China
| | - Lina Du
- College of Life Science, Engineering Research Center of the Chinese Ministry of Education for Bioreactor and Pharmaceutical Development, Jilin Agricultural University, NO. 2888, XinCheng Avenue, Changchun, 130118, China
| | - Haiyan Li
- College of Life Science, Engineering Research Center of the Chinese Ministry of Education for Bioreactor and Pharmaceutical Development, Jilin Agricultural University, NO. 2888, XinCheng Avenue, Changchun, 130118, China.
| | - Xiaokun Li
- College of Life Science, Engineering Research Center of the Chinese Ministry of Education for Bioreactor and Pharmaceutical Development, Jilin Agricultural University, NO. 2888, XinCheng Avenue, Changchun, 130118, China. .,School of Pharmacy, Wenzhou Medical University, Chashan Avenue, Wenzhou, 325035, Zhejiang, China.
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8
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Bade G, Khan MA, Srivastava AK, Khare P, Solaiappan KK, Guleria R, Palaniyar N, Talwar A. Serum cytokine profiling and enrichment analysis reveal the involvement of immunological and inflammatory pathways in stable patients with chronic obstructive pulmonary disease. Int J Chron Obstruct Pulmon Dis 2014; 9:759-73. [PMID: 25125975 PMCID: PMC4130715 DOI: 10.2147/copd.s61347] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Chronic obstructive pulmonary disease (COPD) is a major global health problem. It results from chronic inflammation and causes irreversible airway damage. Levels of different serum cytokines could be surrogate biomarkers for inflammation and lung function in COPD. We aimed to determine the serum levels of different biomarkers in COPD patients, the association between cytokine levels and various prognostic parameters, and the key pathways/networks involved in stable COPD. In this study, serum levels of 48 cytokines were examined by multiplex assays in 30 subjects (control, n=9; COPD, n=21). Relationships between serum biomarkers and forced expiratory volume in 1 second, peak oxygen uptake, body mass index, dyspnea score, and smoking were assessed. Enrichment pathways and network analyses were implemented, using a list of cytokines showing differential expression between healthy controls and patients with COPD by Cytoscape and GeneGo Metacore™ software (Thomson-Reuters Corporation, New York, NY, USA). Concentrations of cutaneous T-cell attracting chemokine, eotaxin, hepatocyte growth factor, interleukin 6 (IL-6), IL-16, and stem cell factor are significantly higher in COPD patients compared with in control patients. Notably, this study identifies stem cell factor as a biomarker for COPD. Multiple regression analysis predicts that cutaneous T-cell-attracting chemokine, eotaxin, IL-6, and stem cell factor are inversely associated with forced expiratory volume in 1 second and peak oxygen uptake change, whereas smoking is related to eotaxin and hepatocyte growth factor changes. Enrichment pathways and network analyses reveal the potential involvement of specific inflammatory and immune process pathways in COPD. Identified network interaction and regulation of different cytokines would pave the way for deeper insight into mechanisms of the disease process.
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Affiliation(s)
- Geetanjali Bade
- Department of Physiology, All India Institute of Medical Sciences, New Delhi, India
| | - Meraj Alam Khan
- Program in Physiology and Experimental Medicine, The Hospital for Sick Children, Department of Laboratory Medicine and Pathobiology, and Institute of Medical Sciences, Faculty of Medicine, University of Toronto, Toronto, ON, Canada
| | | | - Parul Khare
- Department of Physiology, All India Institute of Medical Sciences, New Delhi, India
| | | | - Randeep Guleria
- Department of Pulmonary Medicine and Sleep Disorders, All India Institute of Medical Sciences, New Delhi, India
| | - Nades Palaniyar
- Program in Physiology and Experimental Medicine, The Hospital for Sick Children, Department of Laboratory Medicine and Pathobiology, and Institute of Medical Sciences, Faculty of Medicine, University of Toronto, Toronto, ON, Canada
| | - Anjana Talwar
- Department of Physiology, All India Institute of Medical Sciences, New Delhi, India
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9
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Hepatocyte growth factor, a determinant of airspace homeostasis in the murine lung. PLoS Genet 2013; 9:e1003228. [PMID: 23459311 PMCID: PMC3573081 DOI: 10.1371/journal.pgen.1003228] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2012] [Accepted: 11/23/2012] [Indexed: 12/02/2022] Open
Abstract
The alveolar compartment, the fundamental gas exchange unit in the lung, is critical for tissue oxygenation and viability. We explored hepatocyte growth factor (HGF), a pleiotrophic cytokine that promotes epithelial proliferation, morphogenesis, migration, and resistance to apoptosis, as a candidate mediator of alveolar formation and regeneration. Mice deficient in the expression of the HGF receptor Met in lung epithelial cells demonstrated impaired airspace formation marked by a reduction in alveolar epithelial cell abundance and survival, truncation of the pulmonary vascular bed, and enhanced oxidative stress. Administration of recombinant HGF to tight-skin mice, an established genetic emphysema model, attenuated airspace enlargement and reduced oxidative stress. Repair in the TSK/+ mouse was punctuated by enhanced akt and stat3 activation. HGF treatment of an alveolar epithelial cell line not only induced proliferation and scattering of the cells but also conferred protection against staurosporine-induced apoptosis, properties critical for alveolar septation. HGF promoted cell survival was attenuated by akt inhibition. Primary alveolar epithelial cells treated with HGF showed improved survival and enhanced antioxidant production. In conclusion, using both loss-of-function and gain-of-function maneuvers, we show that HGF signaling is necessary for alveolar homeostasis in the developing lung and that augmentation of HGF signaling can improve airspace morphology in murine emphysema. Our studies converge on prosurvival signaling and antioxidant protection as critical pathways in HGF–mediated airspace maintenance or repair. These findings support the exploration of HGF signaling enhancement for diseases of the airspace. The airspace compartment of the mammalian lung, comprised of spherical sacs termed alveoli, harbors the architecture, cellular composition, and molecular armamentarium to perform the critical function of gas exchange or oxygen uptake. Despite the necessity of this alveolar compartment for organismal viability, the mechanism by which alveoli are formed and maintained is obscure. Furthermore, no treatments are currently available that can regenerate the airspace once damaged. In this manuscript, we sought to determine whether hepatocyte growth factor, a cytokine with a functional armamentarium that subserves the critical events of alveolar formation (epithelial proliferation, migration, resistance from apoptosis and angiogenesis), could be an important mediator of alveolar formation and airspace maintenance. Our simple paradigm was that critical homeostatic pathways for the lung should operate both in lung formation and in lung maintenance/regeneration. Using an informative battery of mouse models and cell lines, we show that hepatocyte growth factor is a determinant of alveolar formation and that the enhancement of hepatocyte growth factor signaling can both protect and repair the airspace from pathologic airspace enlargement or emphysema.
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10
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Muyal JP, Muyal V, Kotnala S, Kumar D, Bhardwaj H. Therapeutic potential of growth factors in pulmonary emphysematous condition. Lung 2012; 191:147-63. [PMID: 23161370 DOI: 10.1007/s00408-012-9438-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2012] [Accepted: 11/04/2012] [Indexed: 02/02/2023]
Abstract
Pulmonary emphysema is a major manifestation of chronic obstructive pulmonary disease (COPD), which is characterized by progressive destruction of alveolar parenchyma with persistent inflammation of the small airways. Such destruction in the distal respiratory tract is irreversible and irreparable. All-trans-retinoic acid was suggested as a novel therapy for regeneration of lost alveoli in emphysema. However, profound discrepancies were evident between studies. At present, no effective therapeutic options are available that allow for the regeneration of lost alveoli in emphysematous human lungs. Recently, some reports on rodent's models have suggested the beneficial effects of various growth factors toward alveolar maintenance and repair processes.
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Affiliation(s)
- Jai Prakash Muyal
- Department of Biotechnology, School of Biotechnology, Gautam Buddha University, Greater Noida, 201308, India.
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11
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Fakin R, Hamacher J, Gugger M, Gazdhar A, Moser H, Schmid RA. Prolonged amelioration of acute lung allograft rejection by sequential overexpression of human interleukin-10 and hepatocyte growth factor in rats. Exp Lung Res 2011; 37:555-62. [PMID: 21895445 DOI: 10.3109/01902148.2011.601785] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
The effect of prolonged electroporation-mediated human interleukin-10 (hIL-10) overexpression 24 hours before transplantation, combined with sequential human hepatocyte growth factor (HGF) overexpression into skeletal muscle on day 5, on rat lung allograft rejection was evaluated. Left lung allotransplantation was performed from Brown-Norway to Fischer-F344 rats. Gene transfer into skeletal muscle was enhanced by electroporation. Three groups were studied: group I animals (n = 5) received 2.5 μg pCIK-hIL-10 (hIL-10/CMV [cytomegalovirus] early promoter enhancer) on day -1 and 80 μg pCIK-HGF (HGF/CMV early promoter enhancer) on day 5. Group II animals (n = 4) received 2.5 μg pCIK-hIL-10 and pUbC-hIL-10 (hIL-10/pUbC promoter) on day -1. Control group III animals (n = 4) were treated by sham electroporation on days -1 and 5. All animals received daily nontherapeutic intraperitoneal dose of cyclosporin A (2.5 mg/kg) and were sacrificed on day 15. Graft oxygenation and allograft rejection were evaluated. Significant differences were found between study groups in graft oxygenation (Pao(2)) (P = .0028; group I vs. groups II and III, P < .01 each). Pao(2) was low in group II (31 ± 1 mm Hg) and in group III controls (34 ± 10 mm Hg), without statistically significant difference between these 2 groups (P = .54). In contrast, in group I, Pao(2) of recipients sequentially transduced with IL-10 and HGF plasmids was much improved, with 112 ± 39 mm Hg (vs. groups II and III; P < .01 each), paralleled by reduced vascular and bronchial rejection (group I vs. groups II and III, P < .021 each). Sequential overexpression of anti-inflammatory cytokine IL-10, followed by sequential and overlapping HGF overexpression on day 5, preserves lung function and reduces acute lung allograft rejection up to day 15 post transplant as compared to prolonged IL-10 overexpression alone.
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Affiliation(s)
- Richard Fakin
- Division of General Thoracic Surgery, University Hospital Bern, University of Bern, Switzerland
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Takahashi Y, Izumi Y, Kohno M, Kimura T, Kawamura M, Okada Y, Nomori H, Ikeda E. Thyroid Transcription Factor-1 Influences the Early Phase of Compensatory Lung Growth in Adult Mice. Am J Respir Crit Care Med 2010; 181:1397-406. [DOI: 10.1164/rccm.200908-1265oc] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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13
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Sauleda J, Noguera A, Blanquer D, Pons J, López M, Villena C, Agustí AGN. Pulmonary and systemic hepatocyte and keratinocyte growth factors in patients with chronic obstructive pulmonary disease. Int J Chron Obstruct Pulmon Dis 2009; 3:719-25. [PMID: 19281086 PMCID: PMC2650601 DOI: 10.2147/copd.s3078] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Background The potential role of growth factors in chronic obstructive pulmonary disease (COPD) has begun to be addressed only recently and is still poorly understood. For this study, we investigated potential abnormalities of hepatocyte growth factor (HGF) and keratinocyte growth factor (KGF) in patients with COPD. Methods To this end, we compared the levels of HGF and KGF, measured by enzyme-linked immunosorbent assay (ELISA), in bronchoalveolar lavage (BAL) fluid and in serum in 18 patients with COPD (62 ± 9 yrs, forced expiratory volume in one second [FEV1] 57 ± 12% ref, X ± standard deviation of mean), 18 smokers with normal lung function (58 ± 8 yrs, FEV1 90 ± 6% ref) and 8 never smokers (67 ± 9 yrs, 94 ± 14% ref). Results We found that in BAL, HGF levels were higher in patients with COPD than in the other two groups whereas, in serum, HGF concentration was highest in smokers with normal lung function (p < 0.01). KGF levels were not significantly different between groups, neither in blood nor in BAL (most values were below the detection limit). Conclusions These results highlight a different response of HGF in BAL and serum in smokers with and without COPD that may be relevant for tissue repair in COPD.
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Affiliation(s)
- Jaume Sauleda
- Servei de Pneumologia, Hospital Universitari Son Dureta, Fundació Caubet-Cimera Illes Balears, Illes Balears, Spain.
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Shigemura N, Okumura M, Mizuno S, Imanishi Y, Nakamura T, Sawa Y. Autologous transplantation of adipose tissue-derived stromal cells ameliorates pulmonary emphysema. Am J Transplant 2006; 6:2592-600. [PMID: 17049053 DOI: 10.1111/j.1600-6143.2006.01522.x] [Citation(s) in RCA: 94] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Adipose tissue is a useful tool for management of most complex cardiothoracic problems, including the reinforcement of damaged lungs, and adipose tissue-derived stromal cells (ASCs) have been suggested to secrete hepatocyte growth factor (HGF), a multipotent regenerative factor that contributes to the repair process after lung injury. The goal of this study was to demonstrate the therapeutic impact of autologous transplantation of ASCs through HGF supplementation for the enhancement of alveolar repair in a rat model of emphysema. ASCs were isolated from inguinal subcutaneous fat pads and characterized by flow cytometry. Cultured ASC were found to secrete significantly larger amounts of HGF (15 112 +/- 1628 pg per 10(6) cells) than other angiogenic factors. Transplantation of ASCs into elastase-treated emphysema models induced a significant increase in endogenous HGF expression in lung tissues with a small amount of increase in other organs, with the high levels lasting for up to 4 weeks after transplantation. Further, alveolar and vascular regeneration were significantly enhanced via inhibition of alveolar cell apoptosis, enhancement of epithelial cell proliferation and promotion of angiogenesis in pulmonary vasculature, leading to restoration of pulmonary function affected by emphysema. These data suggest that autologous ASC cell therapy may have a therapeutic potential for pulmonary emphysema, through inducing HGF expression selectively in injured lung tissues.
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Affiliation(s)
- N Shigemura
- Division of Cardiothoracic Surgery, Osaka University Graduate School of Medicine, Osaka, Japan
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Shigemura N, Sawa Y, Mizuno S, Ono M, Ohta M, Nakamura T, Kaneda Y, Matsuda H. Amelioration of pulmonary emphysema by in vivo gene transfection with hepatocyte growth factor in rats. Circulation 2005; 111:1407-14. [PMID: 15781752 DOI: 10.1161/01.cir.0000158433.89103.85] [Citation(s) in RCA: 74] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND Hepatocyte growth factor (HGF) is an important mitogen and morphogen that contributes to the repair process after lung injury. The goal of the present study was to characterize its role in pulmonary emphysema, which may lead to the development of new treatment strategies with HGF. METHODS AND RESULTS HGF mRNA and protein levels in lung tissue and plasma from elastase-induced emphysema rats transiently increased, then declined significantly to below the basal level in a time-dependent manner (P<0.01). Furthermore, changes in HGF were correlated with histologically progressive emphysematous changes and deterioration in pulmonary physiology. Use of the HVJ (hemagglutinating virus of Japan) envelope method resulted in successful transfection of cDNA encoding human HGF, as demonstrated by an efficient expression of HGF in alveolar endothelial and epithelial cells. Transfection of HGF resulted in a more extensive pulmonary vasculature and inhibition of alveolar wall cell apoptosis, and those effects led to improved exercise tolerance and gas exchange (P<0.05), which persisted for more than 1 month. CONCLUSIONS Decreased HGF expression due to a failure in sustained endogenous production after injury was associated with emphysema-related histopathologic and physiological changes in the present rat model. In addition, induction of HGF expression by a gene-transfection method resulted in improved pulmonary function via inhibition of alveolar cell apoptosis, enhancement of alveolar regeneration, and promotion of angiogenesis.
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Affiliation(s)
- Norihisa Shigemura
- Department of Surgery, Osaka University Graduate School of Medicine, Osaka, Japan
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Padela S, Cabacungan J, Shek S, Belcastro R, Yi M, Jankov RP, Tanswell AK. Hepatocyte growth factor is required for alveologenesis in the neonatal rat. Am J Respir Crit Care Med 2005; 172:907-14. [PMID: 15994466 DOI: 10.1164/rccm.200504-567oc] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
RATIONALE Our core hypothesis is that growth factors that have dysregulated expression during experimental neonatal lung injury are likely to be involved in normal postnatal lung growth and alveologenesis. OBJECTIVES To determine if hepatocyte growth factor (HGF) is upregulated in neonatal lung injury and is essential for postnatal alveologenesis. METHODS A neonatal lung injury, in which there were patchy areas of interstitial thickening with a relative increase in the proportion of epithelial cells, was induced in newborn rats by exposing them to 60% oxygen for 14 days. Air-exposed pups had binding of endogenous HGF to its natural receptor, c-Met, inhibited by the intraperitoneal injection of either neutralizing antibody to HGF, or a truncated soluble c-Met receptor. MEASUREMENTS AND MAIN RESULTS The 60% oxygen-mediated lung injury was associated with increased lung mRNAs for hepatocyte growth factor and c-Met, relative to air-exposed control lungs, at Day 7 after birth. After exposure to 60% oxygen, immunoreactive HGF was increased at Days 4 and 7, and immunoreactive c-Met was increased at Day 14. In air-exposed pups, intraperitoneal injections of neutralizing antibody to HGF inhibited DNA synthesis in alveoli-forming secondary crests, and reduced the number of alveoli in 6-day-old pups. Intraperitoneal injections of a truncated soluble c-Met receptor inhibited DNA synthesis in secondary crests in 4-day-old air-exposed rat pups. CONCLUSIONS HGF and its c-Met receptor are required for normal postnatal alveolar formation from secondary crests, and are upregulated during 60% oxygen-induced neonatal lung injury.
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Affiliation(s)
- Sanna Padela
- Canadian Institutes of Health Research Group in Lung Development, Hospital for Sick Children Research Institute, University of Toronto, Ontario, Canada
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Gern JE, Rosenthal LA, Sorkness RL, Lemanske RF. Effects of viral respiratory infections on lung development and childhood asthma. J Allergy Clin Immunol 2005; 115:668-74; quiz 675. [PMID: 15805982 PMCID: PMC7119046 DOI: 10.1016/j.jaci.2005.01.057] [Citation(s) in RCA: 115] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Viral infections are closely linked to wheezing in infancy, and those children with recurrent virus-induced wheezing episodes are at great risk for chronic childhood asthma. Infancy is a time of increased susceptibility to viral infections, and this stage is also characterized by pulmonary alveolar multiplication and extensive remodeling of the airways to accommodate growth. This coincidence, together with the observation that children with asthma can have structural lung changes and functional deficits at an early age, suggests that viral infections could adversely affect lung development. Inflammatory mediators induced by viral infection are known to have effects on the remodeling process, suggesting a plausible mechanism to support this theory. Furthermore, animal models of viral infection during lung growth and development suggest that developmental factors are important in determining the consequences of infection on long-term lung function. Greater understanding of the effects of viral infections on lung development and growth in early childhood might lead to the discovery of additional strategies for the prevention of recurrent wheezing and chronic asthma.
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Affiliation(s)
- James E Gern
- Department of Pediatrics, University of Wisconsin-Madison, 600 Highland Avenue, Madison, WI 53792-9988, USA.
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Shigemura N, Sawa Y, Mizuno S, Ono M, Minami M, Okumura M, Nakamura T, Kaneda Y, Matsuda H. Induction of compensatory lung growth in pulmonary emphysema improves surgical outcomes in rats. Am J Respir Crit Care Med 2005; 171:1237-45. [PMID: 15764723 DOI: 10.1164/rccm.200411-1518oc] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
RATIONALE AND OBJECTIVES Although lung volume reduction surgery (LVRS) has been widely used as a therapeutic strategy for pulmonary emphysema, the procedure carries significant disadvantages, including significant operative mortality and a limited duration of effective response. Pulmonary resection is known to elicit compensatory growth in remnant lung tissues; however, it remains unclear whether and how compensatory growth occurs and contributes to clinical outcomes after LVRS. The goal of the present study was to characterize the role of hepatocyte growth factor (HGF) in compensatory lung growth after LVRS in a rat model of elastase-induced emphysema, since HGF is a potent pulmotrophic factor responsible for the regeneration of lung parenchyma in damaged lungs, including after a pulmonary resection. METHODS AND MAIN RESULTS Unexpectedly, LVRS did not cause apparent increases in the endogenous HGF profiles of emphysematous lungs. Further, the lowered HGF production reflected a histologically inferior regenerative capacity in remnant lungs and was linked with impaired pulmonary functional recoveries after LVRS. When HGF was exogenously supplemented by gene transfection into emphysematous lungs simultaneously with LVRS, compensatory lung growth (as evidenced by increased lobe weight and alveolar regeneration and angiogenesis) was significantly enhanced as compared with rats that underwent LVRS alone. Consequently, pulmonary function and gas exchange were also significantly improved. CONCLUSIONS We concluded that the induction of compensatory growth by growth factors after LVRS may be a new strategy to further improve clinical outcomes of LVRS in patients with pulmonary emphysema.
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Affiliation(s)
- Norihisa Shigemura
- Department of Surgery, Division of Molecular Regenerative Medicine, Osaka University Graduate School of Medicine, E1, 2-2 Yamadaoka, Suita, Osaka 565-0871, Japan.
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Mizuno S, Matsumoto K, Li MY, Nakamura T. HGF reduces advancing lung fibrosis in mice: a potential role for MMP-dependent myofibroblast apoptosis. FASEB J 2005; 19:580-2. [PMID: 15665032 DOI: 10.1096/fj.04-1535fje] [Citation(s) in RCA: 135] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Pulmonary fibrosis is characterized by a loss of lung epithelial cells, replaced by interstitial myofibroblasts to deposit extracellular matrix (ECM) proteins. Previous studies demonstrated that hepatocyte growth factor (HGF) improved lung fibrosis in murine models, whereas molecular mechanisms whereby HGF improved lung fibrosis have yet to be fully understood. When MRC-5 human lung fibroblasts were treated with transforming growth factor-beta1, the cells underwent phenotypic change similar to myofibroblasts and this was associated with up-regulation of c-Met/HGF receptor expression. For the myofibroblast-like cells, HGF increased activities of MMP-2/-9, predominant enzymes for breakdown of fibronectin (FN). Under such conditions, HGF induced caspase-dependent apoptosis, linked with a decrease in a FN central cell binding (CCB) domain involved in FAK phosphorylation. When MMI270 (a broad-spectrum MMP inhibitor) was added together with HGF, decreases in FN-CCB domain expression and FAK phosphorylation by HGF were restored, and these events were associated with an inhibition of HGF-induced apoptosis, suggesting that increased activities of MMPs underlie the major mechanism of HGF-mediated apoptosis in myofibroblasts. In bleomycin-treated mice, c-Met expression was found on interstitial myofibroblasts and HGF increased apoptosis in culture of myofibroblasts isolated from bleomycin-treated murine lungs. Furthermore, administration of recombinant HGF to bleomycin-treated mice increased lung MMP activities and enhanced myofibroblast apoptosis, while in vivo MMI270 injections together with HGF inhibited such MMP activation, leading to suppressed myofibroblast apoptosis. In conclusion, we identified HGF as a key ligand to elicit myofibroblast apoptosis and ECM degradation, whereas activation of the HGF/c-Met system in fibrotic lungs may be considered a target to attenuate progression of chronic lung disorders.
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Affiliation(s)
- Shinya Mizuno
- Division of Molecular Regenerative Medicine, Department of Molecular Regenerative Medicine, Osaka University Graduate School of Medicine, Suita, Japan
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Lassus P, Heikkilä P, Andersson LC, von Boguslawski K, Andersson S. Lower concentration of pulmonary hepatocyte growth factor is associated with more severe lung disease in preterm infants. J Pediatr 2003; 143:199-202. [PMID: 12970632 DOI: 10.1067/s0022-3476(03)00297-x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
OBJECTIVES Hepatocyte growth factor (HGF) participates in normal lung development and in regeneration after lung injury in animals. We studied the role of HGF during the perinatal period and in the development of bronchopulmonary dysplasia (BPD). STUDY DESIGN HGF was measured in 172 tracheal aspirate fluid samples (TAF) from 17 preterm infants in whom BPD subsequently developed (gestational age, 27.2+/-1.7 weeks; body weight, 828+/-210 g) and from 15 who survived without BPD (gestational age, 26.8+/-1.9 weeks; body weight, 994+/-265 g) during the first 2 postnatal weeks. RESULTS Infants with subsequent development of BPD had lower HGF in TAF (45+/-9 pg/mL per IgA-sc) than those surviving without BPD (102+/-32 pg/mL per IgA-sc; P=.028). Lower HGF in TAF were seen in infants with more severe acute respiratory distress as defined as requirement for surfactant therapy (50+/-14 vs 146+/-50 pg/mL per IgA-sc in infants requiring no surfactant; P=.0001), for higher number of surfactant doses (r=-0.16, P=.06), and for mechanical ventilation >1 week (167+/-51 vs 51+/-14 pg/mL per IgA-sc in infants intubated <1 week; P=.0012). CONCLUSIONS These data show an association between lower HGF concentration in TAF and more severe lung disease in human preterm infants in the early neonatal period.
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Affiliation(s)
- Patrik Lassus
- Hospital for Children and Adolescents, Stenbäckinkatu 11, 00290 Helsinki, Finland.
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