1
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Autophagy-related proteases accompany the transition of pre-chondrogenic cells into chondroblasts. Ann Anat 2021; 239:151781. [PMID: 34144159 DOI: 10.1016/j.aanat.2021.151781] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Revised: 05/05/2021] [Accepted: 05/27/2021] [Indexed: 12/15/2022]
Abstract
BACKGROUND Autophagy is classified as a form of programmed cell death. Nevertheless, besides the death-inducing function, autophagy enables removal of damaged organelles, energy savings, and thus cell survival. This applies in particular to cells with poor renewal capabilities, such as chondroblasts. Autophagy is regulated by a complex molecular network, including proteases and their substrates. In autopodium, autophagy-related proteases have been examined particularly within the context of the elimination of the interdigital tissue. However, the death-inducing effects of their expression/activation have not been specified yet. This work focuses on autophagy-associated proteases (cathepsins, matrix metalloproteinases, and caspases) involved in phalangeal cartilage of the mouse autopodium. METHODS PCR Array, Real Time PCR, and immunohistochemistry were used to follow the expression of autophagy-associated genesin vivo at two developmental stages prenatal/embryonic (E)12 vs. E14. Real Time PCR was then applied to investigate the influence of rapamycin (an inductor of autophagy) on the expression of autophagy-associated proteases in chondroblasts in vitro using micromass culture. RESULTS Several proteases showed increased expression levels during the transition of pre-chondrogenic cells into chondroblastsin vivo. The most significant increases were observed for Ctsb (fold regulation 2.22), Ctsd (fold regulation 2.37), Ctss (fold regulation 2.92), Mmp9 (up to 445%), and Casp8 (up to 250%). The transition was associated also with high expression of crucial autophagic inducers, such as Atgs. The in vitro treatment of chondroblasts by autophagy inductor rapamycin showed significantly decreased expression of cathepsins, a mild increase in expression of metalloproteinases, and no effect in caspase expression. CONCLUSIONS The present data provide a screening of autophagy-associated proteases accompanying the formation of cartilage in vivo and specify their expression under rapamycin treatment in vitro. Notably, the selected proteases are assigned to osteoarthritis, therefore their regulation might be used in clinically oriented studies.
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Fox KA, Kirwan DE, Whittington AM, Krishnan N, Robertson BD, Gilman RH, López JW, Singh S, Porter JC, Friedland JS. Platelets Regulate Pulmonary Inflammation and Tissue Destruction in Tuberculosis. Am J Respir Crit Care Med 2019; 198:245-255. [PMID: 29420060 DOI: 10.1164/rccm.201710-2102oc] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
RATIONALE Platelets may interact with the immune system in tuberculosis (TB) to regulate human inflammatory responses that lead to morbidity and spread of infection. OBJECTIVES To identify a functional role of platelets in the innate inflammatory and matrix-degrading response in TB. METHODS Markers of platelet activation were examined in plasma from 50 patients with TB before treatment and 50 control subjects. Twenty-five patients were followed longitudinally. Platelet-monocyte interactions were studied in a coculture model infected with live, virulent Mycobacterium tuberculosis (M.tb) and dissected using qRT-PCR, Luminex multiplex arrays, matrix degradation assays, and colony counts. Immunohistochemistry detected CD41 (cluster of differentiation 41) expression in a pulmonary TB murine model, and secreted platelet factors were measured in BAL fluid from 15 patients with TB and matched control subjects. MEASUREMENTS AND MAIN RESULTS Five of six platelet-associated mediators were upregulated in plasma of patients with TB compared with control subjects, with concentrations returning to baseline by Day 60 of treatment. Gene expression of the monocyte collagenase MMP-1 (matrix metalloproteinase-1) was upregulated by platelets in M.tb infection. Platelets also enhanced M.tb-induced MMP-1 and -10 secretion, which drove type I collagen degradation. Platelets increased monocyte IL-1 and IL-10 and decreased IL-12 and MDC (monocyte-derived chemokine; also known as CCL-22) secretion, as consistent with an M2 monocyte phenotype. Monocyte killing of intracellular M.tb was decreased. In the lung, platelets were detected in a TB mouse model, and secreted platelet mediators were upregulated in human BAL fluid and correlated with MMP and IL-1β concentrations. CONCLUSIONS Platelets drive a proinflammatory, tissue-degrading phenotype in TB.
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Affiliation(s)
- Katharine A Fox
- 1 Infectious Diseases and Immunity, Wellcome Trust Centre for Global Health Research, and
| | - Daniela E Kirwan
- 1 Infectious Diseases and Immunity, Wellcome Trust Centre for Global Health Research, and
| | - Ashley M Whittington
- 1 Infectious Diseases and Immunity, Wellcome Trust Centre for Global Health Research, and
| | - Nitya Krishnan
- 2 Medical Research Council Centre for Molecular Bacteriology and Infection, Department of Medicine, Imperial College London, United Kingdom
| | - Brian D Robertson
- 2 Medical Research Council Centre for Molecular Bacteriology and Infection, Department of Medicine, Imperial College London, United Kingdom
| | - Robert H Gilman
- 3 Department of International Health, Johns Hopkins University, Baltimore Maryland.,4 Laboratorio de Investigación en Enfermedades Infecciosas, Universidad Peruana Cayetano Heredia, Lima, Peru
| | - José W López
- 5 Laboratorio de Bioinformática y Biología Molecular, Universidad Peruana Cayetano Heredia, Lima, Peru.,6 Instituto Nacional de Salud del Niño, Lima, Peru; and
| | - Shivani Singh
- 1 Infectious Diseases and Immunity, Wellcome Trust Centre for Global Health Research, and
| | - Joanna C Porter
- 7 Centre for Inflammation and Tissue Repair, Respiratory Medicine, University College London, United Kingdom
| | - Jon S Friedland
- 1 Infectious Diseases and Immunity, Wellcome Trust Centre for Global Health Research, and
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3
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Zhou X, Yang J, Zhang Z, Zhang L, Lie L, Zhu B, Xu L, Gao Y, Du X, Huang Y, Wang R, Liu H, Li Y, Hu S, Zhou C, Wen Q, Pan Q, Ma L. Interferon regulatory factor 1 eliminates mycobacteria by suppressing p70 S6 kinase via mechanistic target of rapamycin signaling. J Infect 2019; 79:262-276. [DOI: 10.1016/j.jinf.2019.06.007] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2018] [Revised: 04/23/2019] [Accepted: 06/12/2019] [Indexed: 01/21/2023]
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4
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Sabir N, Hussain T, Mangi MH, Zhao D, Zhou X. Matrix metalloproteinases: Expression, regulation and role in the immunopathology of tuberculosis. Cell Prolif 2019; 52:e12649. [PMID: 31199047 PMCID: PMC6668971 DOI: 10.1111/cpr.12649] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2019] [Revised: 05/11/2019] [Accepted: 05/15/2019] [Indexed: 12/25/2022] Open
Abstract
Mycobacterium tuberculosis (Mtb) leads to approximately 1.5 million human deaths every year. In pulmonary tuberculosis (TB), Mtb must drive host tissue destruction to cause pulmonary cavitation and dissemination in the tissues. Matrix metalloproteinases (MMPs) are endopeptidases capable of degrading all components of pulmonary extracellular matrix (ECM). It is well established that Mtb infection leads to upregulation of MMPs and also causes disturbance in the balance between MMPs and tissue inhibitors of metalloproteinases (TIMPs), thus altering the extracellular matrix deposition. In TB, secretion of MMPs is mainly regulated by NF-κB, p38 and MAPK signalling pathways. In addition, recent studies have demonstrated the immunomodulatory roles of MMPs in Mtb pathogenesis. Researchers have proposed a new regimen of improved TB treatment by inhibition of MMP activity to hinder matrix destruction and to minimize the TB-associated morbidity and mortality. The proposed regimen involves adjunctive use of MMP inhibitors such as doxycycline, marimastat and other related drugs along with front-line anti-TB drugs to reduce granuloma formation and bacterial load. These findings implicate the possible addition of economical and well-tolerated MMP inhibitors to current multidrug regimens as an attractive mean to increase the drug potency. Here, we will summarize the recent advancements regarding expression of MMPs in TB, their immunomodulatory role, as well as their potential as therapeutic targets to control the deadly disease.
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Affiliation(s)
- Naveed Sabir
- Key Laboratory of Animal Epidemiology and Zoonosis, Ministry of Agriculture, National Animal Transmissible Spongiform Encephalopathy Laboratory, College of Veterinary Medicine, China Agricultural University, Beijing, China
| | - Tariq Hussain
- Key Laboratory of Animal Epidemiology and Zoonosis, Ministry of Agriculture, National Animal Transmissible Spongiform Encephalopathy Laboratory, College of Veterinary Medicine, China Agricultural University, Beijing, China
| | - Mazhar Hussain Mangi
- Key Laboratory of Animal Epidemiology and Zoonosis, Ministry of Agriculture, National Animal Transmissible Spongiform Encephalopathy Laboratory, College of Veterinary Medicine, China Agricultural University, Beijing, China
| | - Deming Zhao
- Key Laboratory of Animal Epidemiology and Zoonosis, Ministry of Agriculture, National Animal Transmissible Spongiform Encephalopathy Laboratory, College of Veterinary Medicine, China Agricultural University, Beijing, China
| | - Xiangmei Zhou
- Key Laboratory of Animal Epidemiology and Zoonosis, Ministry of Agriculture, National Animal Transmissible Spongiform Encephalopathy Laboratory, College of Veterinary Medicine, China Agricultural University, Beijing, China
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5
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Xu S, Liu C, Ji H. Concise Review: Therapeutic Potential of the Mesenchymal Stem Cell Derived Secretome and Extracellular Vesicles for Radiation-Induced Lung Injury: Progress and Hypotheses. Stem Cells Transl Med 2019; 8:344-354. [PMID: 30618085 PMCID: PMC6431606 DOI: 10.1002/sctm.18-0038] [Citation(s) in RCA: 61] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2018] [Accepted: 11/27/2018] [Indexed: 12/15/2022] Open
Abstract
Radiation-induced lung injury (RILI) is a common complication in radiotherapy of thoracic tumors and limits the therapeutic dose of radiation that can be given to effectively control tumors. RILI develops through a complex pathological process, resulting in induction and activation of various cytokines, infiltration by inflammatory cells, cytokine-induced activation of fibroblasts, and subsequent tissue remodeling by activated fibroblasts, ultimately leading to impaired lung function and respiratory failure. Increasing evidence shows that mesenchymal stem cells (MSCs) may play a main role in modulating inflammation and immune responses, promoting survival and repair of damaged resident cells and enhancing regeneration of damaged tissue through soluble paracrine factors and therapeutic extracellular vesicles. Therefore, the use of the MSC-derived secretome and exosomes holds promising potential for RILI therapy. Here, we review recent progress on the potential mechanisms of MSC therapy for RILI, with an emphasis on soluble paracrine factors of MSCs. Hypotheses on how MSC derived exosomes or MSC-released exosomal miRNAs could attenuate RILI are also proposed. Problems and translational challenges of the therapies based on the MSC-derived secretome and exosomes are further summarized and underline the need for caution on rapid clinical translation. Stem Cells Translational Medicine 2019;8:344-354.
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Affiliation(s)
- Siguang Xu
- Institute of Lung and Molecular TherapyXinxiang Medical UniversityXinxiangHenanPeople's Republic of China
| | - Cong Liu
- Institute of Lung and Molecular TherapyXinxiang Medical UniversityXinxiangHenanPeople's Republic of China
| | - Hong‐Long Ji
- Department of Cellular and Molecular BiologyUniversity of Texas Health Science Center at TylerTylerTexasUSA
- Texas Lung Injury InstituteUniversity of Texas Health Science Center at TylerTylerTexasUSA
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6
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Rohlwink UK, Walker NF, Ordonez AA, Li YJ, Tucker EW, Elkington PT, Wilkinson RJ, Wilkinson KA. Matrix Metalloproteinases in Pulmonary and Central Nervous System Tuberculosis-A Review. Int J Mol Sci 2019; 20:ijms20061350. [PMID: 30889803 PMCID: PMC6471445 DOI: 10.3390/ijms20061350] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2019] [Revised: 02/27/2019] [Accepted: 03/03/2019] [Indexed: 01/06/2023] Open
Abstract
Tuberculosis (TB) remains the single biggest infectious cause of death globally, claiming almost two million lives and causing disease in over 10 million individuals annually. Matrix metalloproteinases (MMPs) are a family of proteolytic enzymes with various physiological roles implicated as key factors contributing to the spread of TB. They are involved in the breakdown of lung extracellular matrix and the consequent release of Mycobacterium tuberculosis bacilli into the airways. Evidence demonstrates that MMPs also play a role in central nervous system (CNS) tuberculosis, as they contribute to the breakdown of the blood brain barrier and are associated with poor outcome in adults with tuberculous meningitis (TBM). However, in pediatric TBM, data indicate that MMPs may play a role in both pathology and recovery of the developing brain. MMPs also have a significant role in HIV-TB-associated immune reconstitution inflammatory syndrome in the lungs and the brain, and their modulation offers potential novel therapeutic avenues. This is a review of recent research on MMPs in pulmonary and CNS TB in adults and children and in the context of co-infection with HIV. We summarize different methods of MMP investigation and discuss the translational implications of MMP inhibition to reduce immunopathology.
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Affiliation(s)
- Ursula K Rohlwink
- Neuroscience Institute, University of Cape Town, Faculty of Health Sciences, Anzio Road, Observatory 7925, South Africa.
| | - Naomi F Walker
- TB Centre and Department of Clinical Research, London School of Hygiene and Tropical Medicine, Keppel St, London WC1E 7HT, UK.
| | - Alvaro A Ordonez
- Department of Pediatrics, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA.
- Center for Tuberculosis Research, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA.
| | - Yifan J Li
- Faculty of Health Sciences, University of Cape Town, Anzio Road, Observatory 7925, South Africa.
| | - Elizabeth W Tucker
- Center for Tuberculosis Research, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA.
- Department of Anesthesiology and Critical Care Medicine, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA.
- Division of Pediatric Critical Care, Johns Hopkins All Children's Hospital, St. Petersburg, FL 33701, USA.
| | - Paul T Elkington
- NIHR Biomedical Research Centre, School of Clinical and Experimental Sciences, Faculty of Medicine, University of Southampton, Southampton, SO16 6YD, UK.
| | - Robert J Wilkinson
- Wellcome Centre for Infectious Diseases Research in Africa, Institute of Infectious Diseases and Molecular Medicine, University of Cape Town, Cape Town 7925, South Africa.
- The Francis Crick Institute, 1 Midland Road, London NW1 1AT, UK.
- Department of Medicine, Imperial College London, London W2 1PG, UK.
| | - Katalin A Wilkinson
- Wellcome Centre for Infectious Diseases Research in Africa, Institute of Infectious Diseases and Molecular Medicine, University of Cape Town, Cape Town 7925, South Africa.
- The Francis Crick Institute, 1 Midland Road, London NW1 1AT, UK.
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7
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Stek C, Allwood B, Walker NF, Wilkinson RJ, Lynen L, Meintjes G. The Immune Mechanisms of Lung Parenchymal Damage in Tuberculosis and the Role of Host-Directed Therapy. Front Microbiol 2018; 9:2603. [PMID: 30425706 PMCID: PMC6218626 DOI: 10.3389/fmicb.2018.02603] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2018] [Accepted: 10/11/2018] [Indexed: 12/20/2022] Open
Abstract
Impaired lung function is common in people with a history of tuberculosis. Host-directed therapy added to tuberculosis treatment may reduce lung damage and result in improved lung function. An understanding of the pathogenesis of pulmonary damage in TB is fundamental to successfully predicting which interventions could be beneficial. In this review, we describe the different features of TB immunopathology that lead to impaired lung function, namely cavities, bronchiectasis, and fibrosis. We discuss the immunological processes that cause lung damage, focusing on studies performed in humans, and using chest radiograph abnormalities as a marker for pulmonary damage. We highlight the roles of matrix metalloproteinases, neutrophils, eicosanoids and cytokines, like tumor necrosis factor-α and interleukin 1β, as well as the role of HIV co-infection. Finally, we focus on various existing drugs that affect one or more of the immunological mediators of lung damage and could therefore play a role as host-directed therapy.
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Affiliation(s)
- Cari Stek
- Wellcome Centre for Infectious Diseases Research in Africa, Institute of Infectious Disease and Molecular Medicine, University of Cape Town, Cape Town, South Africa.,Department of Clinical Sciences, Institute of Tropical Medicine Antwerp, Antwerp, Belgium.,Department of Medicine, University of Cape Town, Cape Town, South Africa
| | - Brian Allwood
- Division of Pulmonology, Department of Medicine, Stellenbosch University, Stellenbosch, South Africa
| | - Naomi F Walker
- Wellcome Centre for Infectious Diseases Research in Africa, Institute of Infectious Disease and Molecular Medicine, University of Cape Town, Cape Town, South Africa.,Department of Clinical Research, London School of Hygiene & Tropical Medicine, London, United Kingdom
| | - Robert J Wilkinson
- Wellcome Centre for Infectious Diseases Research in Africa, Institute of Infectious Disease and Molecular Medicine, University of Cape Town, Cape Town, South Africa.,Department of Medicine, University of Cape Town, Cape Town, South Africa.,Department of Medicine, Imperial College London, London, United Kingdom.,Francis Crick Institute, London, United Kingdom
| | - Lutgarde Lynen
- Department of Clinical Sciences, Institute of Tropical Medicine Antwerp, Antwerp, Belgium
| | - Graeme Meintjes
- Wellcome Centre for Infectious Diseases Research in Africa, Institute of Infectious Disease and Molecular Medicine, University of Cape Town, Cape Town, South Africa.,Department of Medicine, University of Cape Town, Cape Town, South Africa
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8
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Brilha S, Chong DLW, Khawaja AA, Ong CWM, Guppy NJ, Porter JC, Friedland JS. Integrin α2β1 Expression Regulates Matrix Metalloproteinase-1-Dependent Bronchial Epithelial Repair in Pulmonary Tuberculosis. Front Immunol 2018; 9:1348. [PMID: 29988449 PMCID: PMC6024194 DOI: 10.3389/fimmu.2018.01348] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2018] [Accepted: 05/31/2018] [Indexed: 11/22/2022] Open
Abstract
Pulmonary tuberculosis (TB) is caused by inhalation of Mycobacterium tuberculosis, which damages the bronchial epithelial barrier to establish local infection. Matrix metalloproteinase-1 plays a crucial role in the immunopathology of TB, causing breakdown of type I collagen and cavitation, but this collagenase is also potentially involved in bronchial epithelial repair. We hypothesized that the extracellular matrix (ECM) modulates M. tuberculosis-driven matrix metalloproteinase-1 expression by human bronchial epithelial cells (HBECs), regulating respiratory epithelial cell migration and repair. Medium from monocytes stimulated with M. tuberculosis induced collagenase activity in bronchial epithelial cells, which was reduced by ~87% when cells were cultured on a type I collagen matrix. Matrix metalloproteinase-1 had a focal localization, which is consistent with cell migration, and overall secretion decreased by 32% on type I collagen. There were no associated changes in the specific tissue inhibitors of metalloproteinases. Decreased matrix metalloproteinase-1 secretion was due to ligand-binding to the α2β1 integrin and was dependent on the actin cytoskeleton. In lung biopsies, samples from patients with pulmonary TB, integrin α2β1 is highly expressed on the bronchial epithelium. Areas of lung with disrupted collagen matrix showed an increase in matrix metalloproteinases-1 expression compared with areas where collagen was comparable to control lung. Type I collagen matrix increased respiratory epithelial cell migration in a wound-healing assay, and this too was matrix metalloproteinase-dependent, since it was blocked by the matrix metalloproteinase inhibitor GM6001. In summary, we report a novel mechanism by which α2β1-mediated signals from the ECM modulate matrix metalloproteinase-1 secretion by HBECs, regulating their migration and epithelial repair in TB.
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Affiliation(s)
- Sara Brilha
- Infectious Diseases and Immunity, Imperial College London, London, United Kingdom.,Centre for Inflammation and Tissue Repair, University College London, London, United Kingdom
| | - Deborah L W Chong
- Centre for Inflammation and Tissue Repair, University College London, London, United Kingdom
| | - Akif A Khawaja
- Centre for Inflammation and Tissue Repair, University College London, London, United Kingdom
| | - Catherine W M Ong
- Infectious Diseases and Immunity, Imperial College London, London, United Kingdom.,Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Naomi J Guppy
- UCL Advanced Diagnostics, University College London, London, United Kingdom
| | - Joanna C Porter
- Centre for Inflammation and Tissue Repair, University College London, London, United Kingdom
| | - Jon S Friedland
- Infectious Diseases and Immunity, Imperial College London, London, United Kingdom
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9
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Singh S, Maniakis‐Grivas G, Singh UK, Asher RM, Mauri F, Elkington PT, Friedland JS. Interleukin-17 regulates matrix metalloproteinase activity in human pulmonary tuberculosis. J Pathol 2018; 244:311-322. [PMID: 29210073 PMCID: PMC5838784 DOI: 10.1002/path.5013] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2017] [Revised: 10/21/2017] [Accepted: 11/24/2017] [Indexed: 12/21/2022]
Abstract
Tuberculosis (TB) is characterized by extensive pulmonary matrix breakdown. Interleukin-17 (IL-17) is key in host defence in TB but its role in TB-driven tissue damage is unknown. We investigated the hypothesis that respiratory stromal cell matrix metalloproteinase (MMP) production in TB is regulated by T-helper 17 (TH -17) cytokines. Biopsies of patients with pulmonary TB were analysed by immunohistochemistry (IHC), and patient bronchoalveolar lavage fluid (BALF) MMP and cytokine concentrations were measured by Luminex assays. Primary human airway epithelial cells were stimulated with conditioned medium from human monocytes infected with Mycobacterium tuberculosis (Mtb) and TH -17 cytokines. MMP secretion, activity, and gene expression were determined by ELISA, Luminex assay, zymography, RT-qPCR, and dual luciferase reporter assays. Signalling pathways were examined using phospho-western analysis and siRNA. IL-17 is expressed in TB patient granulomas and MMP-3 is expressed in adjacent pulmonary epithelial cells. IL-17 had a divergent, concentration-dependent effect on MMP secretion, increasing epithelial secretion of MMP-3 (p < 0.001) over 72 h, whilst decreasing that of MMP-9 (p < 0.0001); mRNA levels were similarly affected. Both IL-17 and IL-22 increased fibroblast Mtb-dependent MMP-3 secretion but IL-22 did not modulate epithelial MMP-3 expression. Both IL-17 and IL-22, but not IL-23, were significantly up-regulated in BALF from TB patients. IL-17-driven MMP-3 was dependent on p38 MAP kinase and the PI3K p110α subunit. In summary, IL-17 drives airway stromal cell-derived MMP-3, a mediator of tissue destruction in TB, alone and with monocyte-dependent networks in TB. This is regulated by p38 MAP kinase and PI3K pathways. © 2017 The Authors. The Journal of Pathology published by John Wiley & Sons Ltd on behalf of Pathological Society of Great Britain and Ireland.
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Affiliation(s)
- Shivani Singh
- Infectious Diseases and ImmunityImperial CollegeLondonUK
| | | | - Utpal K Singh
- Tuberculosis Unit, Department of MedicineNalanda University HospitalsAgam KuanPatnaIndia
| | - Radha M Asher
- Infectious Diseases and ImmunityImperial CollegeLondonUK
| | - Francesco Mauri
- Department of Histopathology, Hammersmith HospitalsImperial College LondonUK
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10
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Lou J, Wang Y, Zhang Z, Qiu W. Activation of MMPs in Macrophages by Mycobacterium tuberculosis via the miR-223-BMAL1 Signaling Pathway. J Cell Biochem 2017; 118:4804-4812. [PMID: 28543681 DOI: 10.1002/jcb.26150] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2017] [Accepted: 05/18/2017] [Indexed: 12/12/2022]
Abstract
An interaction between Mycobacterium tuberculosis and macrophages constitutes an essential step in tuberculosis development, as macrophages exert both positive and negative effects on M. tuberculosis-triggered organ lesions. In this study, we focused on the regulation of the expression of matrix metalloproteinases (MMPs), which is responsible for lung matrix degradation and bacteria dissection, in macrophages following M. tuberculosis infection. Female BALB/c mice were intravenously injected with the M. tuberculosis strain H37Rv at 0 h zeitgeber time (ZT0) or 12 h zeitgeber time (ZT12). The expression and activity of MMP-1, -2, -3, and -9 in lungs and spleens were then evaluated. In vitro, peritoneal macrophages were harvested at ZT0 or at ZT12 and infected with 10 MOI M. tuberculosis. The expression of MMPs, microRNA-223 and BMAL1 was analyzed by qRT-PCR and/or Western blot. The binding of BMAL1 3'-UTR by miR-223 was confirmed by luciferase activity assay. Additionally, wild-type BMAL1 or NLSmut BMAL1 plasmids were transfected to evaluate the effect of BMAL1 on MMPs. The results showed a differential expression of MMPs in mice tissues infected at different times. M. tuberculosis infection caused enhanced MMP-1, -9, and miR-223 expression, with inhibited BMAL1 expression. MiR-223 modulated BMAL1 expression via the direct binding of BMAL1 3'-UTR. Furthermore, wild-type BMAL1 other than NLSmut BMAL1 attenuated MMPs expression in M. tuberculosis-infected macrophages. Overall, this study demonstrated a potential involvement of circadian rhythm in MMP activation by M. tuberculosis in macrophages. J. Cell. Biochem. 118: 4804-4812, 2017. © 2017 Wiley Periodicals, Inc.
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Affiliation(s)
- Jun Lou
- Department of Clinical Laboratory, Zhumadian Central Hospital, Zhumadian, 463000, P.R. China
| | - Yongli Wang
- Neonatal Intensive Care Unit, Zhumadian Central Hospital, Zhumadian, 463000, P.R. China
| | - Zhimin Zhang
- Department of Clinical Laboratory, Zhumadian Central Hospital, Zhumadian, 463000, P.R. China
| | - Weiqiang Qiu
- Department of Clinical Laboratory, Zhumadian Central Hospital, Zhumadian, 463000, P.R. China
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11
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Matrix metalloproteinase-9 activity and a downregulated Hedgehog pathway impair blood-brain barrier function in an in vitro model of CNS tuberculosis. Sci Rep 2017; 7:16031. [PMID: 29167512 PMCID: PMC5700087 DOI: 10.1038/s41598-017-16250-3] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2017] [Accepted: 11/03/2017] [Indexed: 12/21/2022] Open
Abstract
Central nervous system tuberculosis (CNS TB) has a high mortality and morbidity associated with severe inflammation. The blood-brain barrier (BBB) protects the brain from inflammation but the mechanisms causing BBB damage in CNS TB are uncharacterized. We demonstrate that Mycobacterium tuberculosis (Mtb) causes breakdown of type IV collagen and decreases tight junction protein (TJP) expression in a co-culture model of the BBB. This increases permeability, surface expression of endothelial adhesion molecules and leukocyte transmigration. TJP breakdown was driven by Mtb-dependent secretion of matrix metalloproteinase (MMP)-9. TJP expression is regulated by Sonic hedgehog (Shh) through transcription factor Gli-1. In our model, the hedgehog pathway was downregulated by Mtb-stimulation, but Shh levels in astrocytes were unchanged. However, Scube2, a glycoprotein regulating astrocyte Shh release was decreased, inhibiting Shh delivery to brain endothelial cells. Activation of the hedgehog pathway by addition of a Smoothened agonist or by addition of exogenous Shh, or neutralizing MMP-9 activity, decreased permeability and increased TJP expression in the Mtb-stimulated BBB co-cultures. In summary, the BBB is disrupted by downregulation of the Shh pathway and breakdown of TJPs, secondary to increased MMP-9 activity which suggests that these pathways are potential novel targets for host directed therapy in CNS TB.
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12
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Brilha S, Sathyamoorthy T, Stuttaford LH, Walker NF, Wilkinson RJ, Singh S, Moores RC, Elkington PT, Friedland JS. Early Secretory Antigenic Target-6 Drives Matrix Metalloproteinase-10 Gene Expression and Secretion in Tuberculosis. Am J Respir Cell Mol Biol 2017; 56:223-232. [PMID: 27654284 DOI: 10.1165/rcmb.2016-0162oc] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
Tuberculosis (TB) causes disease worldwide, and multidrug resistance is an increasing problem. Matrix metalloproteinases (MMPs), particularly the collagenase MMP-1, cause lung extracellular matrix destruction, which drives disease transmission and morbidity. The role in such tissue damage of the stromelysin MMP-10, a key activator of the collagenase MMP-1, was investigated in direct Mycobacterium tuberculosis (Mtb)-infected macrophages and in conditioned medium from Mtb-infected monocyte-stimulated cells. Mtb infection increased MMP-10 secretion from primary human macrophages 29-fold, whereas Mtb-infected monocytes increased secretion by 4.5-fold from pulmonary epithelial cells and 10.5-fold from fibroblasts. Inhibition of MMP-10 activity decreased collagen breakdown. In two independent cohorts of patients with TB from different continents, MMP-10 was increased in both induced sputum and bronchoalveolar lavage fluid compared with control subjects and patients with other respiratory diseases (both P < 0.05). Mtb drove 3.5-fold greater MMP-10 secretion from human macrophages than the vaccine strain bacillus Calmette-Guerin (P < 0.001), whereas both mycobacteria up-regulated TNF-α secretion equally. Using overlapping, short, linear peptides covering the sequence of early secretory antigenic target-6, a virulence factor secreted by Mtb, but not bacillus Calmette-Guerin, we found that stimulation of human macrophages with a single specific 15-amino acid peptide sequence drove threefold greater MMP-10 secretion than any other peptide (P < 0.001). Mtb-driven MMP-10 secretion was inhibited in a dose-dependent manner by p38 and extracellular signal-related kinase mitogen-activated protein kinase blockade (P < 0.001 and P < 0.01 respectively), but it was not affected by inhibition of NF-κB. In summary, Mtb activates inflammatory and stromal cells to secrete MMP-10, and this is partly driven by the virulence factor early secretory antigenic target-6, implicating it in TB-associated tissue destruction.
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Affiliation(s)
- Sara Brilha
- 1 Infectious Diseases and Immunity, Imperial College London, London, United Kingdom.,2 Centre for Inflammation and Tissue Repair, Respiratory Medicine, University College London, London, United Kingdom
| | | | - Laura H Stuttaford
- 1 Infectious Diseases and Immunity, Imperial College London, London, United Kingdom
| | - Naomi F Walker
- 1 Infectious Diseases and Immunity, Imperial College London, London, United Kingdom.,3 Clinical Infectious Diseases Research Initiative, Institute of Infectious Diseases and Molecular Medicine, University of Cape Town, Cape Town, South Africa.,4 Department of Clinical Research, London School of Hygiene and Tropical Medicine, London, United Kingdom
| | - Robert J Wilkinson
- 3 Clinical Infectious Diseases Research Initiative, Institute of Infectious Diseases and Molecular Medicine, University of Cape Town, Cape Town, South Africa.,5 Department of Medicine, Imperial College London, London, United Kingdom.,6 The Francis Crick Institute, London, United Kingdom.,7 Wellcome Trust Imperial College Centre for Global Health, Imperial College London, London, United Kingdom; and
| | - Shivani Singh
- 1 Infectious Diseases and Immunity, Imperial College London, London, United Kingdom
| | - Rachel C Moores
- 1 Infectious Diseases and Immunity, Imperial College London, London, United Kingdom
| | - Paul T Elkington
- 1 Infectious Diseases and Immunity, Imperial College London, London, United Kingdom.,8 National Institute of Health Research Respiratory Biomedical Research Unit, Faculty of Medicine, University of Southampton, Southampton, United Kingdom
| | - Jon S Friedland
- 1 Infectious Diseases and Immunity, Imperial College London, London, United Kingdom.,7 Wellcome Trust Imperial College Centre for Global Health, Imperial College London, London, United Kingdom; and
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13
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Brace PT, Tezera LB, Bielecka MK, Mellows T, Garay D, Tian S, Rand L, Green J, Jogai S, Steele AJ, Millar TM, Sanchez-Elsner T, Friedland JS, Proud CG, Elkington PT. Mycobacterium tuberculosis subverts negative regulatory pathways in human macrophages to drive immunopathology. PLoS Pathog 2017; 13:e1006367. [PMID: 28570642 PMCID: PMC5453634 DOI: 10.1371/journal.ppat.1006367] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2016] [Accepted: 04/19/2017] [Indexed: 12/23/2022] Open
Abstract
Tuberculosis remains a global pandemic and drives lung matrix destruction to transmit. Whilst pathways driving inflammatory responses in macrophages have been relatively well described, negative regulatory pathways are less well defined. We hypothesised that Mycobacterium tuberculosis (Mtb) specifically targets negative regulatory pathways to augment immunopathology. Inhibition of signalling through the PI3K/AKT/mTORC1 pathway increased matrix metalloproteinase-1 (MMP-1) gene expression and secretion, a collagenase central to TB pathogenesis, and multiple pro-inflammatory cytokines. In patients with confirmed pulmonary TB, PI3Kδ expression was absent within granulomas. Furthermore, Mtb infection suppressed PI3Kδ gene expression in macrophages. Interestingly, inhibition of the MNK pathway, downstream of pro-inflammatory p38 and ERK MAPKs, also increased MMP-1 secretion, whilst suppressing secretion of TH1 cytokines. Cross-talk between the PI3K and MNK pathways was demonstrated at the level of eIF4E phosphorylation. Mtb globally suppressed the MMP-inhibitory pathways in macrophages, reducing levels of mRNAs encoding PI3Kδ, mTORC-1 and MNK-1 via upregulation of miRNAs. Therefore, Mtb disrupts negative regulatory pathways at multiple levels in macrophages to drive a tissue-destructive phenotype that facilitates transmission.
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Affiliation(s)
- Patience T. Brace
- NIHR Biomedical Research Centre, Clinical and Experimental Sciences Academic Unit, Faculty of Medicine, University of Southampton, Southampton, United Kingdom
| | - Liku B. Tezera
- NIHR Biomedical Research Centre, Clinical and Experimental Sciences Academic Unit, Faculty of Medicine, University of Southampton, Southampton, United Kingdom
| | - Magdalena K. Bielecka
- NIHR Biomedical Research Centre, Clinical and Experimental Sciences Academic Unit, Faculty of Medicine, University of Southampton, Southampton, United Kingdom
| | - Toby Mellows
- NIHR Biomedical Research Centre, Clinical and Experimental Sciences Academic Unit, Faculty of Medicine, University of Southampton, Southampton, United Kingdom
| | - Diana Garay
- NIHR Biomedical Research Centre, Clinical and Experimental Sciences Academic Unit, Faculty of Medicine, University of Southampton, Southampton, United Kingdom
| | - Shuye Tian
- South Australian Health and Medical Research Institute, Adelaide, and School of Biological Sciences, University of Adelaide, Adelaide, Australia
| | - Lucinda Rand
- Department of Infectious Diseases and Immunity, Imperial College London, London, United Kingdom
| | - Justin Green
- Department of Infectious Diseases and Immunity, Imperial College London, London, United Kingdom
| | - Sanjay Jogai
- NIHR Biomedical Research Centre, Clinical and Experimental Sciences Academic Unit, Faculty of Medicine, University of Southampton, Southampton, United Kingdom
| | - Andrew J. Steele
- Cancer Sciences, Faculty of Medicine, University of Southampton, Southampton, United Kingdom
| | - Timothy M. Millar
- NIHR Biomedical Research Centre, Clinical and Experimental Sciences Academic Unit, Faculty of Medicine, University of Southampton, Southampton, United Kingdom
| | - Tilman Sanchez-Elsner
- NIHR Biomedical Research Centre, Clinical and Experimental Sciences Academic Unit, Faculty of Medicine, University of Southampton, Southampton, United Kingdom
| | - Jon S. Friedland
- Department of Infectious Diseases and Immunity, Imperial College London, London, United Kingdom
| | - Christopher G. Proud
- South Australian Health and Medical Research Institute, Adelaide, and School of Biological Sciences, University of Adelaide, Adelaide, Australia
| | - Paul T. Elkington
- NIHR Biomedical Research Centre, Clinical and Experimental Sciences Academic Unit, Faculty of Medicine, University of Southampton, Southampton, United Kingdom
- Institute for Life Sciences, University of Southampton, Southampton, United Kingdom
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14
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Moores RC, Brilha S, Schutgens F, Elkington PT, Friedland JS. Epigenetic Regulation of Matrix Metalloproteinase-1 and -3 Expression in Mycobacterium tuberculosis Infection. Front Immunol 2017; 8:602. [PMID: 28596772 PMCID: PMC5442172 DOI: 10.3389/fimmu.2017.00602] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2017] [Accepted: 05/08/2017] [Indexed: 12/20/2022] Open
Abstract
In pulmonary tuberculosis (TB), the inflammatory immune response against Mycobacterium tuberculosis (Mtb) is associated with tissue destruction and cavitation, which drives disease transmission, chronic lung disease, and mortality. Matrix metalloproteinase (MMP)-1 is a host enzyme critical for the development of cavitation. MMP expression has been shown to be epigenetically regulated in other inflammatory diseases, but the importance of such mechanisms in Mtb-associated induction of MMP-1 is unknown. We investigated the role of changes in histone acetylation in Mtb-induced MMP expression using inhibitors of histone deacetylases (HDACs) and histone acetyltransferases (HAT), HDAC siRNA, promoter-reporter constructs, and chromatin immunoprecipitation assays. Mtb infection decreased Class I HDAC gene expression by over 50% in primary human monocyte-derived macrophages but not in normal human bronchial epithelial cells (NHBEs). Non-selective inhibition of HDAC activity decreased MMP-1/-3 expression by Mtb-stimulated macrophages and NHBEs, while class I HDAC inhibition increased MMP-1 secretion by Mtb-stimulated NHBEs. MMP-3 expression, but not MMP-1, was downregulated by siRNA silencing of HDAC1. Inhibition of HAT activity also significantly decreased MMP-1/-3 secretion by Mtb-infected macrophages. The MMP-1 promoter region between −2,001 and −2,942 base pairs from the transcriptional start site was key in control of Mtb-driven MMP-1 gene expression. Histone H3 and H4 acetylation and RNA Pol II binding in the MMP-1 promoter region were increased in stimulated NHBEs. In summary, epigenetic modification of histone acetylation via HDAC and HAT activity has a key regulatory role in Mtb-dependent gene expression and secretion of MMP-1 and -3, enzymes which drive human immunopathology. Manipulation of epigenetic regulatory mechanisms may have potential as a host-directed therapy to improve outcomes in the era of rising TB drug resistance.
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Affiliation(s)
- Rachel C Moores
- Section of Infectious Diseases and Immunity, Imperial College London, London, UK
| | - Sara Brilha
- Section of Infectious Diseases and Immunity, Imperial College London, London, UK.,Centre for Inflammation and Tissue Repair, Respiratory Medicine, University College London, London, UK
| | - Frans Schutgens
- Section of Infectious Diseases and Immunity, Imperial College London, London, UK
| | - Paul T Elkington
- Section of Infectious Diseases and Immunity, Imperial College London, London, UK.,National Institute of Health Research (NIHR) Respiratory Biomedical Research Unit, Faculty of Medicine, University of Southampton, Southampton, UK
| | - Jon S Friedland
- Section of Infectious Diseases and Immunity, Imperial College London, London, UK
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15
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Abstract
Proteases play an important role in health and disease of the lung. In the normal lungs, proteases maintain their homeostatic functions that regulate processes like its regeneration and repair. Dysregulation of proteases–antiproteases balance is crucial in the manifestation of different types of lung diseases. Chronic inflammatory lung pathologies are associated with a marked increase in protease activities. Thus, in addition to protease activities, inhibition of anti-proteolytic control mechanisms are also important for effective microbial infection and inflammation in the lung. Herein, we briefly summarize the role of different proteases and to some extent antiproteases in regulating a variety of lung diseases.
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16
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Ong CWM, Pabisiak PJ, Brilha S, Singh P, Roncaroli F, Elkington PT, Friedland JS. Complex regulation of neutrophil-derived MMP-9 secretion in central nervous system tuberculosis. J Neuroinflammation 2017; 14:31. [PMID: 28173836 PMCID: PMC5294728 DOI: 10.1186/s12974-017-0801-1] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2016] [Accepted: 01/23/2017] [Indexed: 01/13/2023] Open
Abstract
Background Central nervous system tuberculosis (CNS-TB) may be fatal even with treatment. Neutrophils are the key mediators of TB immunopathology, and raised CSF matrix metalloproteinase-9 (MMP-9) which correlates to neutrophil count in CNS-TB is associated with neurological deficit and death. The mechanisms by which neutrophils drive TB-associated CNS matrix destruction are not clearly defined. Methods Human brain biopsies with histologically proven CNS-TB were stained for neutrophils, neutrophil elastase, and MMP-9. Neutrophil MMP-9 secretion and gene expression were analyzed using Luminex and real-time PCR. Type IV collagen degradation was evaluated using confocal microscopy and quantitative fluorescent assays. Intracellular signaling pathways were investigated by immunoblotting and chemical inhibitors. Results MMP-9-expressing neutrophils were present in tuberculous granulomas in CNS-TB and neutrophil-derived MMP-9 secretion was upregulated by Mycobacterium tuberculosis (M.tb). Concurrent direct stimulation by M.tb and activation via monocyte-dependent networks had an additive effect on neutrophil MMP-9 secretion. Destruction of type IV collagen, a key component of the blood-brain barrier, was inhibited by neutralizing neutrophil MMP-9. Monocyte-neutrophil networks driving MMP-9 secretion in TB were regulated by MAP-kinase and Akt-PI3 kinase pathways and the transcription factor NF-kB. TNFα neutralization suppressed MMP-9 secretion to baseline while dexamethasone did not. Conclusions Multiple signaling paths regulate neutrophil-derived MMP-9 secretion, which is increased in CNS-TB. These paths may be better targets for host-directed therapies than steroids currently used in CNS-TB.
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Affiliation(s)
- Catherine W M Ong
- Section of Infectious Diseases and Immunity, Hammersmith Campus, Imperial College London, 8th floor Commonwealth Building, Du Cane Road, London, W12 0NN, UK.,Division of Infectious Diseases, Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Przemyslaw J Pabisiak
- Section of Infectious Diseases and Immunity, Hammersmith Campus, Imperial College London, 8th floor Commonwealth Building, Du Cane Road, London, W12 0NN, UK
| | - Sara Brilha
- Section of Infectious Diseases and Immunity, Hammersmith Campus, Imperial College London, 8th floor Commonwealth Building, Du Cane Road, London, W12 0NN, UK
| | - Poonam Singh
- Department of Histopathology, Hammersmith Campus, Imperial College London, London, UK
| | - Federico Roncaroli
- Division of Neuroscience and Experimental Psychology, University of Manchester, Manchester, UK
| | - Paul T Elkington
- Section of Infectious Diseases and Immunity, Hammersmith Campus, Imperial College London, 8th floor Commonwealth Building, Du Cane Road, London, W12 0NN, UK.,NIHR Respiratory Biomedical Research Unit, Faculty of Medicine, University of Southampton, Southampton, UK
| | - Jon S Friedland
- Section of Infectious Diseases and Immunity, Hammersmith Campus, Imperial College London, 8th floor Commonwealth Building, Du Cane Road, London, W12 0NN, UK.
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17
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Chang PY, Qu YQ, Wang J, Dong LH. The potential of mesenchymal stem cells in the management of radiation enteropathy. Cell Death Dis 2015; 6:e1840. [PMID: 26247725 PMCID: PMC4558492 DOI: 10.1038/cddis.2015.189] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2015] [Revised: 06/02/2015] [Accepted: 06/08/2015] [Indexed: 12/20/2022]
Abstract
Although radiotherapy is effective in managing abdominal and pelvic malignant tumors, radiation enteropathy is still unavoidable. This disease severely affects the quality of life of cancer patients due to some refractory lesions, such as intestinal ischemia, mucositis, ulcer, necrosis or even perforation. Current drugs or prevailing therapies are committed to alleviating the symptoms induced by above lesions. But the efficacies achieved by these interventions are still not satisfactory, because the milieus for tissue regeneration are not distinctly improved. In recent years, regenerative therapy for radiation enteropathy by using mesenchymal stem cells is of public interests. Relevant results of preclinical and clinical studies suggest that this regenerative therapy will become an attractive tool in managing radiation enteropathy, because mesenchymal stem cells exhibit their pro-regenerative potentials for healing the injuries in both epithelium and endothelium, minimizing inflammation and protecting irradiated intestine against fibrogenesis through activating intrinsic repair actions. In spite of these encouraging results, whether mesenchymal stem cells promote tumor growth is still an issue of debate. On this basis, we will discuss the advances in anticancer therapy by using mesenchymal stem cells in this review after analyzing the pathogenesis of radiation enteropathy, introducing the advances in managing radiation enteropathy using regenerative therapy and exploring the putative actions by which mesenchymal stem cells repair intestinal injuries. At last, insights gained from the potential risks of mesenchymal stem cell-based therapy for radiation enteropathy patients may provide clinicians with an improved awareness in carrying out their studies.
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Affiliation(s)
- P-Y Chang
- 1] Department of Radiation Oncology, The First Bethune Hospital of Jilin University, Changchun 130021, China [2] Electrochemical State Key Laboratory, Changchun Institute of Applied Chemistry Academy of Science, Changchun 130021, China
| | - Y-Q Qu
- Department of Radiation Oncology, The First Bethune Hospital of Jilin University, Changchun 130021, China
| | - J Wang
- Electrochemical State Key Laboratory, Changchun Institute of Applied Chemistry Academy of Science, Changchun 130021, China
| | - L-H Dong
- Department of Radiation Oncology, The First Bethune Hospital of Jilin University, Changchun 130021, China
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18
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Neutrophil-Derived MMP-8 Drives AMPK-Dependent Matrix Destruction in Human Pulmonary Tuberculosis. PLoS Pathog 2015; 11:e1004917. [PMID: 25996154 PMCID: PMC4440706 DOI: 10.1371/journal.ppat.1004917] [Citation(s) in RCA: 141] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2015] [Accepted: 04/27/2015] [Indexed: 02/07/2023] Open
Abstract
Pulmonary cavities, the hallmark of tuberculosis (TB), are characterized by high mycobacterial load and perpetuate the spread of M. tuberculosis. The mechanism of matrix destruction resulting in cavitation is not well defined. Neutrophils are emerging as key mediators of TB immunopathology and their influx are associated with poor outcomes. We investigated neutrophil-dependent mechanisms involved in TB-associated matrix destruction using a cellular model, a cohort of 108 patients, and in separate patient lung biopsies. Neutrophil-derived NF-kB-dependent matrix metalloproteinase-8 (MMP-8) secretion was up-regulated in TB and caused matrix destruction both in vitro and in respiratory samples of TB patients. Collagen destruction induced by TB infection was abolished by doxycycline, a licensed MMP inhibitor. Neutrophil extracellular traps (NETs) contain MMP-8 and are increased in samples from TB patients. Neutrophils lined the circumference of human pulmonary TB cavities and sputum MMP-8 concentrations reflected TB radiological and clinical disease severity. AMPK, a central regulator of catabolism, drove neutrophil MMP-8 secretion and neutrophils from AMPK-deficient patients secrete lower MMP-8 concentrations. AMPK-expressing neutrophils are present in human TB lung biopsies with phospho-AMPK detected in nuclei. These data demonstrate that neutrophil-derived MMP-8 has a key role in the immunopathology of TB and is a potential target for host-directed therapy in this infectious disease.
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19
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Dong LH, Jiang YY, Liu YJ, Cui S, Xia CC, Qu C, Jiang X, Qu YQ, Chang PY, Liu F. The anti-fibrotic effects of mesenchymal stem cells on irradiated lungs via stimulating endogenous secretion of HGF and PGE2. Sci Rep 2015; 5:8713. [PMID: 25736907 PMCID: PMC4348621 DOI: 10.1038/srep08713] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2014] [Accepted: 02/02/2015] [Indexed: 12/11/2022] Open
Abstract
Radiation-induced pulmonary fibrosis is a common disease and has a poor prognosis owing to the progressive breakdown of gas exchange regions in the lung. Recently, a novel strategy of administering mesenchymal stem cells for pulmonary fibrosis has achieved high therapeutic efficacy. In the present study, we attempted to use human adipose tissue-derived mesenchymal stem cells to prevent disease in Sprague-Dawley rats that received semi-thoracic irradiation (15 Gy). To investigate the specific roles of mesenchymal stem cells in ameliorating radiation-induced pulmonary fibrosis, we treated control groups of irradiated rats with human skin fibroblasts or phosphate-buffered saline. After mesenchymal stem cells were infused, host secretions of hepatocyte growth factor (HGF) and prostaglandin E2 (PGE2) were elevated compared with those of the controls. In contrast, tumour necrosis factor-alpha (TNF-α) and transforming growth factor-beta1 (TGF-β1) levels were decreased after infusion of mesenchymal stem cells. Consequently, the architecture of the irradiated lungs was preserved without marked activation of fibroblasts or collagen deposition within the injured sites. Moreover, mesenchymal stem cells were able to prevent the irradiated type II alveolar epithelial cells from undergoing epithelial-mesenchymal transition. Collectively, these data confirmed that mesenchymal stem cells have the potential to limit pulmonary fibrosis after exposure to ionising irradiation.
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Affiliation(s)
- Li-Hua Dong
- Department of Radiation Oncology, The First Bethune Hospital of Jilin University, Changchun 130000, China
| | - Yi-Yao Jiang
- Department of Cardiac Surgery, TEDA International Cardiovascular Hospital, Tianjin 300000, China
| | - Yong-Jun Liu
- Tianjin Allian Stem Cell Techonology CO., LTD, Tianjin 300308, China
| | - Shuang Cui
- Department of Radiation Oncology, The First Bethune Hospital of Jilin University, Changchun 130000, China
| | - Cheng-Cheng Xia
- Department of Radiation Oncology, The First Bethune Hospital of Jilin University, Changchun 130000, China
| | - Chao Qu
- Department of Radiation Oncology, The First Bethune Hospital of Jilin University, Changchun 130000, China
| | - Xin Jiang
- Department of Radiation Oncology, The First Bethune Hospital of Jilin University, Changchun 130000, China
| | - Ya-Qin Qu
- Department of Radiation Oncology, The First Bethune Hospital of Jilin University, Changchun 130000, China
| | - Peng-Yu Chang
- Department of Radiation Oncology, The First Bethune Hospital of Jilin University, Changchun 130000, China
| | - Feng Liu
- Nephrology department, China-Japan Union Hospital of Jilin University, Changchun 130000, China
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20
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Kübler A, Luna B, Larsson C, Ammerman NC, Andrade BB, Orandle M, Bock KW, Xu Z, Bagci U, Mollura DJ, Marshall J, Burns J, Winglee K, Ahidjo BA, Cheung LS, Klunk M, Jain SK, Kumar NP, Babu S, Sher A, Friedland JS, Elkington PTG, Bishai WR. Mycobacterium tuberculosis dysregulates MMP/TIMP balance to drive rapid cavitation and unrestrained bacterial proliferation. J Pathol 2014; 235:431-44. [PMID: 25186281 PMCID: PMC4293239 DOI: 10.1002/path.4432] [Citation(s) in RCA: 75] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2014] [Revised: 08/04/2014] [Accepted: 08/26/2014] [Indexed: 12/30/2022]
Abstract
Active tuberculosis (TB) often presents with advanced pulmonary disease, including irreversible lung damage and cavities. Cavitary pathology contributes to antibiotic failure, transmission, morbidity and mortality. Matrix metalloproteinases (MMPs), in particular MMP-1, are implicated in TB pathogenesis. We explored the mechanisms relating MMP/TIMP imbalance to cavity formation in a modified rabbit model of cavitary TB. Our model resulted in consistent progression of consolidation to human-like cavities (100% by day 28), with resultant bacillary burdens (>10(7) CFU/g) far greater than those found in matched granulomatous tissue (10(5) CFU/g). Using a novel, breath-hold computed tomography (CT) scanning and image analysis protocol, we showed that cavities developed rapidly from areas of densely consolidated tissue. Radiological change correlated with a decrease in functional lung tissue, as estimated by changes in lung density during controlled pulmonary expansion (R(2) = 0.6356, p < 0.0001). We demonstrated that the expression of interstitial collagenase (MMP-1) was specifically greater in cavitary compared to granulomatous lesions (p < 0.01), and that TIMP-3 significantly decreased at the cavity surface. Our findings demonstrated that an MMP-1/TIMP imbalance is associated with the progression of consolidated regions to cavities containing very high bacterial burdens. Our model provided mechanistic insight, correlating with human disease at the pathological, microbiological and molecular levels. It also provided a strategy to investigate therapeutics in the context of complex TB pathology. We used these findings to predict a MMP/TIMP balance in active TB and confirmed this in human plasma, revealing the potential of MMP/TIMP levels as key components of a diagnostic matrix aimed at distinguishing active from latent TB (PPV = 92.9%, 95% CI 66.1-99.8%, NPV = 85.6%; 95% CI 77.0-91.9%).
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Affiliation(s)
- André Kübler
- Infectious Diseases and Immunity, Imperial College London, UK; Center for Tuberculosis Research, Johns Hopkins University School of Medicine, Baltimore, MD, USA
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21
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Ong CWM, Elkington PT, Friedland JS. Tuberculosis, pulmonary cavitation, and matrix metalloproteinases. Am J Respir Crit Care Med 2014; 190:9-18. [PMID: 24713029 DOI: 10.1164/rccm.201311-2106pp] [Citation(s) in RCA: 143] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Tuberculosis (TB), a chronic infectious disease of global importance, is facing the emergence of drug-resistant strains with few new drugs to treat the infection. Pulmonary cavitation, the hallmark of established disease, is associated with very high bacillary burden. Cavitation may lead to delayed sputum culture conversion, emergence of drug resistance, and transmission of the infection. The host immunological reaction to Mycobacterium tuberculosis is implicated in driving the development of TB cavities. TB is characterized by a matrix-degrading phenotype in which the activity of proteolytic matrix metalloproteinases (MMPs) is relatively unopposed by the specific tissue inhibitors of metalloproteinases. Proteases, in particular MMPs, secreted from monocyte-derived cells, neutrophils, and stromal cells, are involved in both cell recruitment and tissue damage and may cause cavitation. MMP activity is augmented by proinflammatory chemokines and cytokines, is tightly regulated by complex signaling paths, and causes matrix destruction. MMP concentrations are elevated in human TB and are closely associated with clinical and radiological markers of lung tissue destruction. Immunomodulatory therapies targeting MMPs in preclinical and clinical trials are potential adjuncts to TB treatment. Strategies targeting patients with cavitary TB have the potential to improve cure rates and reduce disease transmission.
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Affiliation(s)
- Catherine W M Ong
- 1 Infectious Diseases and Immunity, Hammersmith Campus, Imperial College London, London, United Kingdom
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