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Sanna FC, Benešová I, Pervan P, Krenz A, Wurzel A, Lohmayer R, Mühlbauer J, Wöllner A, Köhl N, Menevse AN, Stamova S, Volpin V, Beckhove P, Xydia M. IL-2 and TCR stimulation induce expression and secretion of IL-32β by human T cells. Front Immunol 2024; 15:1437224. [PMID: 39211051 PMCID: PMC11357969 DOI: 10.3389/fimmu.2024.1437224] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2024] [Accepted: 07/22/2024] [Indexed: 09/04/2024] Open
Abstract
IL-32 expression is important for pathogen clearance but detrimental in chronic inflammation, autoimmunity, and cancer. T cells are major IL-32 producers in these diseases and key mediators of pathogen and tumor elimination but also autoimmune destruction. However, their contribution to IL-32 biology during immune responses is hardly understood due to several isoforms with divergent inflammatory properties. Here, we identified IL-32β as the predominant isoform in various T cell subsets of healthy individuals and breast cancer patients with the highest levels detected in intratumoral regulatory T cells. We show that IL-32β is induced by IL-2 but IL-32β release requires T Cell Receptor rather than IL2R stimulation. Using inhibitors of protein secretion pathways and serial (ultra)centrifugation of T cell supernatants, we demonstrate that T cells actively secrete IL-32β unconventionally, as a free protein and, to a minor degree, through exosomes. Thus, our data identify activated T cells as major IL-32β secretors in health and cancer.
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Affiliation(s)
| | - Iva Benešová
- Interventional Immunology, Leibniz Institute for Immunotherapy, Regensburg, Germany
| | - Philip Pervan
- Interventional Immunology, Leibniz Institute for Immunotherapy, Regensburg, Germany
| | - Adriana Krenz
- Interventional Immunology, Leibniz Institute for Immunotherapy, Regensburg, Germany
| | - Alexander Wurzel
- Interventional Immunology, Leibniz Institute for Immunotherapy, Regensburg, Germany
| | - Robert Lohmayer
- Interventional Immunology, Leibniz Institute for Immunotherapy, Regensburg, Germany
- Algorithmic Bioinformatics, Leibniz Institute for Immunotherapy, Regensburg, Germany
| | - Jasmin Mühlbauer
- Interventional Immunology, Leibniz Institute for Immunotherapy, Regensburg, Germany
| | - Amélie Wöllner
- Department of Internal Medicine III, Hematology and Medical Oncology, University Medical Center, Regensburg, Germany
- Bavarian Cancer Research Center (BZKF), Regensburg, Germany
| | - Nina Köhl
- Department of Internal Medicine III, Hematology and Medical Oncology, University Medical Center, Regensburg, Germany
- Bavarian Cancer Research Center (BZKF), Regensburg, Germany
| | - Ayse Nur Menevse
- Interventional Immunology, Leibniz Institute for Immunotherapy, Regensburg, Germany
- Department of Biosystems Science and Engineering, ETH Zurich, Basel, Switzerland
| | - Slava Stamova
- Interventional Immunology, Leibniz Institute for Immunotherapy, Regensburg, Germany
| | - Valentina Volpin
- Interventional Immunology, Leibniz Institute for Immunotherapy, Regensburg, Germany
| | - Philipp Beckhove
- Interventional Immunology, Leibniz Institute for Immunotherapy, Regensburg, Germany
- Department of Internal Medicine III, Hematology and Medical Oncology, University Medical Center, Regensburg, Germany
| | - Maria Xydia
- Interventional Immunology, Leibniz Institute for Immunotherapy, Regensburg, Germany
- Bavarian Cancer Research Center (BZKF), Regensburg, Germany
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Dong J, Zhao W, Zhao J, Chen J, Liu P, Zheng X, Li D, Xue Y, Zhou H. ALPL regulates pro-angiogenic capacity of mesenchymal stem cells through ATP-P2X7 axis controlled exosomes secretion. J Nanobiotechnology 2024; 22:172. [PMID: 38609899 PMCID: PMC11015668 DOI: 10.1186/s12951-024-02396-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2023] [Accepted: 03/18/2024] [Indexed: 04/14/2024] Open
Abstract
BACKGROUND Early-onset bone dysplasia is a common manifestation of hypophosphatasia (HPP), an autosomal inherited disease caused by ALPL mutation. ALPL ablation induces prototypical premature bone ageing characteristics, resulting in impaired osteogenic differentiation capacity of human bone marrow mesenchymal stem cells (hBMMSCs). As angiogenesis is tightly coupled with osteogenesis, it also plays a necessary role in sustaining bone homeostasis. We have previously observed a decrease in expression of angiogenesis marker gene CD31 in the metaphysis of long bone in Alpl+/- mice. However, the role of ALPL in regulation of angiogenesis in bone has remained largely unknown. METHODS Exosomes derived from Normal and HPP hBMMSCs were isolated and identified by ultracentrifugation, transmission electron microscopy, and nanoparticle size measurement. The effects of ALPL on the angiogenic capacity of hBMMSCs from HPP patients were assessed by immunofluorescence, tube formation, wound healing and migration assay. exo-ELISA and Western Blot were used to evaluate the exosomes secretion of hBMMSCs from HPP, and the protein expression of VEGF, PDGFBB, Angiostatin and Endostatin in exosomes respectively. RESULTS We verified that ALPL ablation resulted in impaired pro-angiogenic capacity of hBMMSCs, accounting for reduced migration and tube formation of human umbilical vein endothelial cells, as the quantities and proteins composition of exosomes varied with ALPL expression. Mechanistically, loss of function of ALPL enhanced ATP release. Additional ATP, in turn, led to markedly elevated level of ATP receptor P2X7, which consequently promoted exosomes secretion, resulting in a decreased capacity to promote angiogenesis. Conversely, inhibition of P2X7 increased the angiogenic induction capacity by preventing excessive release of anti-angiogenic exosomes in ALPL deficient-hBMMSCs. CONCLUSION The ALPL-ATP axis regulates the pro-angiogenic ability of hBMMSCs by controlling exosomes secretion through the P2X7 receptor. Thus, P2X7 may be proved as an effective therapeutic target for accelerating neovascularization in ALPL-deficient bone defects.
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Affiliation(s)
- Jiayi Dong
- State Key Laboratory of Oral & Maxillofacial Reconstruction and Regeneration, National Clinical Research Center for Oral Diseases, Shaanxi Clinical Research Center for Oral Diseases, Department of Oral Surgery, School of Stomatology, The Fourth Military Medical University, Xi'an, China
| | - Wanmin Zhao
- State Key Laboratory of Oral & Maxillofacial Reconstruction and Regeneration, National Clinical Research Center for Oral Diseases, Shaanxi International Joint Research Center for Oral Diseases, Center for Tissue Engineering, School of Stomatology, The Fourth Military Medical University, Xi'an, China
| | - Jiangdong Zhao
- The Key Laboratory of Aerospace Medicine, Ministry of Education, Air Force Medical University, Xi'an, China
| | - Ji Chen
- State Key Laboratory of Oral & Maxillofacial Reconstruction and Regeneration, National Clinical Research Center for Oral Diseases, Shaanxi Engineering Research Center for Dental Materials and Advanced Manufacture, Department of Oral Implants, School of Stomatology, The Fourth Military Medical University, Xi'an, China
| | - Ping Liu
- State Key Laboratory of Oral & Maxillofacial Reconstruction and Regeneration, National Clinical Research Center for Oral Diseases, Shaanxi Clinical Research Center for Oral Diseases, Department of Oral Surgery, School of Stomatology, The Fourth Military Medical University, Xi'an, China
| | - Xueni Zheng
- State Key Laboratory of Oral & Maxillofacial Reconstruction and Regeneration, National Clinical Research Center for Oral Diseases, Shaanxi Clinical Research Center for Oral Diseases, Department of Oral Surgery, School of Stomatology, The Fourth Military Medical University, Xi'an, China
| | - Dehua Li
- State Key Laboratory of Oral & Maxillofacial Reconstruction and Regeneration, National Clinical Research Center for Oral Diseases, Shaanxi Engineering Research Center for Dental Materials and Advanced Manufacture, Department of Oral Implants, School of Stomatology, The Fourth Military Medical University, Xi'an, China.
| | - Yang Xue
- State Key Laboratory of Oral & Maxillofacial Reconstruction and Regeneration, National Clinical Research Center for Oral Diseases, Shaanxi Clinical Research Center for Oral Diseases, Department of Oral Surgery, School of Stomatology, The Fourth Military Medical University, Xi'an, China.
| | - Hongzhi Zhou
- State Key Laboratory of Oral & Maxillofacial Reconstruction and Regeneration, National Clinical Research Center for Oral Diseases, Shaanxi Clinical Research Center for Oral Diseases, Department of Oral Surgery, School of Stomatology, The Fourth Military Medical University, Xi'an, China.
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3
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Acuña-Castillo C, Escobar A, García-Gómez M, Bachelet VC, Huidobro-Toro JP, Sauma D, Barrera-Avalos C. P2X7 Receptor in Dendritic Cells and Macrophages: Implications in Antigen Presentation and T Lymphocyte Activation. Int J Mol Sci 2024; 25:2495. [PMID: 38473744 DOI: 10.3390/ijms25052495] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2023] [Revised: 01/15/2024] [Accepted: 01/24/2024] [Indexed: 03/14/2024] Open
Abstract
The P2X7 receptor, a member of the P2X purinergic receptor family, is a non-selective ion channel. Over the years, it has been associated with various biological functions, from modulating to regulating inflammation. However, its emerging role in antigen presentation has captured the scientific community's attention. This function is essential for the immune system to identify and respond to external threats, such as pathogens and tumor cells, through T lymphocytes. New studies show that the P2X7 receptor is crucial for controlling how antigens are presented and how T cells are activated. These studies focus on antigen-presenting cells, like dendritic cells and macrophages. This review examines how the P2X7 receptor interferes with effective antigen presentation and activates T cells and discusses the fundamental mechanisms that can affect the immune response. Understanding these P2X7-mediated processes in great detail opens up exciting opportunities to create new immunological therapies.
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Affiliation(s)
- Claudio Acuña-Castillo
- Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile, Santiago 9160000, Chile
- Centro de Biotecnología Acuícola, Facultad de Química y Biología, Universidad de Santiago de Chile, Santiago 9160000, Chile
| | - Alejandro Escobar
- Laboratorio Biología Celular y Molecular, Instituto de Investigación en Ciencias Odontológicas, Facultad de Odontología, Universidad de Chile, Santiago 8380000, Chile
| | - Moira García-Gómez
- Departamento de Biología, Facultad de Ciencias, Universidad de Chile, Santiago 7800003, Chile
| | - Vivienne C Bachelet
- Escuela de Medicina, Facultad de Ciencias Médicas, Universidad de Santiago de Chile, Santiago 9160000, Chile
| | - Juan Pablo Huidobro-Toro
- Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile, Santiago 9160000, Chile
| | - Daniela Sauma
- Departamento de Biología, Facultad de Ciencias, Universidad de Chile, Santiago 7800003, Chile
- Centro Ciencia & Vida, Av. Del Valle Norte 725, Huechuraba 8580000, Chile
| | - Carlos Barrera-Avalos
- Centro de Biotecnología Acuícola, Facultad de Química y Biología, Universidad de Santiago de Chile, Santiago 9160000, Chile
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4
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El-Maradny YA, Rubio-Casillas A, Mohamed KI, Uversky VN, Redwan EM. Intrinsic factors behind long-COVID: II. SARS-CoV-2, extracellular vesicles, and neurological disorders. J Cell Biochem 2023; 124:1466-1485. [PMID: 37801299 DOI: 10.1002/jcb.30486] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2023] [Revised: 09/04/2023] [Accepted: 09/22/2023] [Indexed: 10/07/2023]
Abstract
With the decline in the number of new Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) infections, the World Health Organization announced the end of the SARS-CoV-2 pandemic. However, the repercussions of this viral pandemic may remain with us for a longer period of time, as it has remodeled the lives of humankind in many ways, including social and economic. Of course, its most important repercussions remain on the human health level. Long-coronavirus disease (COVID) or post-COVID is a state for which we do not have a concrete definition, a specific international classification of diseases Code, clear diagnostic tools, or well-known effective cures as of yet. In this second article from the Intrinsic Factors behind long-COVID Series, we try to link long-COVID symptoms with their causes, starting from the nervous system. Extracellular vesicles (ECVs) play very complex and ramified roles in the bodies of both healthy and not-healthy individuals. ECVs may facilitate the entry of many bioactive molecules and pathogens into the tissues and cells of the nervous system across the blood-brain barrier. Based on the size, quantity, and quality of their cargo, ECVs are directly proportional to the pathological condition and its severity through intertwined mechanisms that evoke inflammatory immune responses typically accompanied by pathological symptoms over variable time periods according to the type of these symptoms.
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Affiliation(s)
- Yousra A El-Maradny
- Protein Research Department, Genetic Engineering and Biotechnology Research Institute, City of Scientific Research and Technological Applications (SRTA-City), New Borg EL-Arab, Egypt
- Microbiology and Immunology, Faculty of Pharmacy, Arab Academy for Science, Technology and Maritime Transport (AASTMT), El-Alamein, Egypt
| | - Alberto Rubio-Casillas
- Biology Laboratory, Autlán Regional Preparatory School, University of Guadalajara, Autlán, Jalisco, Mexico
| | - Kareem I Mohamed
- Microbiology and Immunology, Faculty of Pharmacy, Arab Academy for Science, Technology and Maritime Transport (AASTMT), El-Alamein, Egypt
| | - Vladimir N Uversky
- Department of Molecular Medicine and USF Health Byrd Alzheimer's Research Institute, Morsani College of Medicine, University of South Florida, Tampa, Florida, USA
| | - Elrashdy M Redwan
- Biological Science Department, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia
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5
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Grassi F, Salina G. The P2X7 Receptor in Autoimmunity. Int J Mol Sci 2023; 24:14116. [PMID: 37762419 PMCID: PMC10531565 DOI: 10.3390/ijms241814116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2023] [Revised: 09/06/2023] [Accepted: 09/08/2023] [Indexed: 09/29/2023] Open
Abstract
The P2X7 receptor (P2X7R) is an ATP-gated nonselective cationic channel that, upon intense stimulation, can progress to the opening of a pore permeable to molecules up to 900 Da. Apart from its broad expression in cells of the innate and adaptive immune systems, it is expressed in multiple cell types in different tissues. The dual gating property of P2X7R is instrumental in determining cellular responses, which depend on the expression level of the receptor, timing of stimulation, and microenvironmental cues, thus often complicating the interpretation of experimental data in comprehensive settings. Here we review the existing literature on P2X7R activity in autoimmunity, pinpointing the different functions in cells involved in the immunopathological processes that can make it difficult to model as a druggable target.
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Affiliation(s)
- Fabio Grassi
- Institute for Research in Biomedicine, Faculty of Biomedical Sciences, Università della Svizzera Italiana, 6500 Bellinzona, Switzerland;
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6
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Zhou Y, Dong Y, Zhang A, Wu J, Sun Q. The role of mesenchymal stem cells derived exosomes as a novel nanobiotechnology target in the diagnosis and treatment of cancer. Front Bioeng Biotechnol 2023; 11:1214190. [PMID: 37662434 PMCID: PMC10470003 DOI: 10.3389/fbioe.2023.1214190] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2023] [Accepted: 08/03/2023] [Indexed: 09/05/2023] Open
Abstract
Mesenchymal stem cells (MSCs), one of the most common types of stem cells, are involved in the modulation of the tumor microenvironment (TME). With the advancement of nanotechnology, exosomes, especially exosomes secreted by MSCs, have been found to play an important role in the initiation and development of tumors. In recent years, nanobiotechnology and bioengineering technology have been gradually developed to detect and identify exosomes for diagnosis and modify exosomes for tumor treatment. Several novel therapeutic strategies bioengineer exosomes to carry drugs, proteins, and RNAs, and further deliver their encapsulated cargoes to cancer cells through the properties of exosomes. The unique properties of exosomes in cancer treatment include targeting, low immunogenicity, flexibility in modification, and high biological barrier permeability. Nevertheless, the current comprehensive understanding of the roles of MSCs and their secreted exosomes in cancer development remain inadequate. It is necessary to better understand/update the mechanism of action of MSCs-secreted exosomes in cancer development, providing insights for better modification of exosomes through bioengineering technology and nanobiotechnology. Therefore, this review focuses on the role of MSCs-secreted exosomes and bioengineered exosomes in the development, progression, diagnosis, and treatment of cancer.
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Affiliation(s)
- You Zhou
- Department of Plastic Surgery, The First Hospital of China Medical University, Shenyang, China
| | - Yuqing Dong
- China Medical University and Department of Pathology, Shenyang, China
| | - Aixue Zhang
- Department of Plastic Surgery, The First Hospital of China Medical University, Shenyang, China
| | - Jibin Wu
- Department of Plastic Surgery, The First Hospital of China Medical University, Shenyang, China
| | - Qiang Sun
- Department of Plastic Surgery, The First Hospital of China Medical University, Shenyang, China
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7
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Lee WE, Genetzakis E, Figtree GA. Novel Strategies in the Early Detection and Treatment of Endothelial Cell-Specific Mitochondrial Dysfunction in Coronary Artery Disease. Antioxidants (Basel) 2023; 12:1359. [PMID: 37507899 PMCID: PMC10376062 DOI: 10.3390/antiox12071359] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2023] [Revised: 06/26/2023] [Accepted: 06/26/2023] [Indexed: 07/30/2023] Open
Abstract
Although elevated cholesterol and other recognised cardiovascular risk factors are important in the development of coronary artery disease (CAD) and heart attack, the susceptibility of humans to this fatal process is distinct from other animals. Mitochondrial dysfunction of cells in the arterial wall, particularly the endothelium, has been strongly implicated in the pathogenesis of CAD. In this manuscript, we review the established evidence and mechanisms in detail and explore the potential opportunities arising from analysing mitochondrial function in patient-derived cells such as endothelial colony-forming cells easily cultured from venous blood. We discuss how emerging technology and knowledge may allow us to measure mitochondrial dysfunction as a potential biomarker for diagnosis and risk management. We also discuss the "pros and cons" of animal models of atherosclerosis, and how patient-derived cell models may provide opportunities to develop novel therapies relevant for humans. Finally, we review several targets that potentially alleviate mitochondrial dysfunction working both via direct and indirect mechanisms and evaluate the effect of several classes of compounds in the cardiovascular context.
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Affiliation(s)
- Weiqian E. Lee
- Kolling Institute, University of Sydney, Sydney, NSW 2006, Australia; (W.E.L.); (E.G.)
- Faculty of Medicine and Health, University of Sydney, Sydney, NSW 2006, Australia
| | - Elijah Genetzakis
- Kolling Institute, University of Sydney, Sydney, NSW 2006, Australia; (W.E.L.); (E.G.)
- Faculty of Medicine and Health, University of Sydney, Sydney, NSW 2006, Australia
| | - Gemma A. Figtree
- Kolling Institute, University of Sydney, Sydney, NSW 2006, Australia; (W.E.L.); (E.G.)
- Faculty of Medicine and Health, University of Sydney, Sydney, NSW 2006, Australia
- Department of Cardiology, Royal North Shore Hospital, Northern Sydney Local Health District, Sydney, NSW 2065, Australia
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8
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Golia MT, Gabrielli M, Verderio C. P2X 7 Receptor and Extracellular Vesicle Release. Int J Mol Sci 2023; 24:9805. [PMID: 37372953 DOI: 10.3390/ijms24129805] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2023] [Revised: 05/21/2023] [Accepted: 06/01/2023] [Indexed: 06/29/2023] Open
Abstract
Extensive evidence indicates that the activation of the P2X7 receptor (P2X7R), an ATP-gated ion channel highly expressed in immune and brain cells, is strictly associated with the release of extracellular vesicles. Through this process, P2X7R-expressing cells regulate non-classical protein secretion and transfer bioactive components to other cells, including misfolded proteins, participating in inflammatory and neurodegenerative diseases. In this review, we summarize and discuss the studies addressing the impact of P2X7R activation on extracellular vesicle release and their activities.
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Affiliation(s)
- Maria Teresa Golia
- National Research Council of Italy, Institute of Neuroscience, Via Raoul Follereau 3, 20854 Vedano al Lambro, Italy
| | - Martina Gabrielli
- National Research Council of Italy, Institute of Neuroscience, Via Raoul Follereau 3, 20854 Vedano al Lambro, Italy
| | - Claudia Verderio
- National Research Council of Italy, Institute of Neuroscience, Via Raoul Follereau 3, 20854 Vedano al Lambro, Italy
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9
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Pacheco PAF, Faria JV, Silva AC, von Ranke NL, Silva RC, Rodrigues CR, da Rocha DR, Faria RX. In silico and pharmacological study of N,S-acetal juglone derivatives as inhibitors of the P2X7 receptor-promoted in vitro and in vivo inflammatory response. Biomed Pharmacother 2023; 162:114608. [PMID: 37003033 DOI: 10.1016/j.biopha.2023.114608] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2023] [Revised: 03/23/2023] [Accepted: 03/24/2023] [Indexed: 04/01/2023] Open
Abstract
Purinergic receptors are transmembrane proteins responsive to extracellular nucleotides and are expressed by several cell types throughout the human body. Among all identified subtypes, the P2×7 receptor has emerged as a relevant target for the treatment of inflammatory disease. Several clinical trials have been conducted to evaluate the effectiveness of P2×7R antagonists. However, to date, no selective antagonist has reached clinical use. In this work, we report the pharmacological evaluation of eleven N, S-acetal juglone derivatives as P2×7R inhibitors. Using in vitro assays and in vivo experimental models, we identified one derivative with promising inhibitory activity and low toxicity. Our in silico studies indicate that the 1,4-naphthoquinone moiety might be a valuable molecular scaffold for the development of novel P2×7R antagonists, as suggested by our previous studies.
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10
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Penolazzi L, Notarangelo MP, Lambertini E, Vultaggio-Poma V, Tarantini M, Di Virgilio F, Piva R. Unorthodox localization of P2X7 receptor in subcellular compartments of skeletal system cells. Front Cell Dev Biol 2023; 11:1180774. [PMID: 37215083 PMCID: PMC10192554 DOI: 10.3389/fcell.2023.1180774] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Accepted: 04/19/2023] [Indexed: 05/24/2023] Open
Abstract
Identifying the subcellular localization of a protein within a cell is often an essential step in understanding its function. The main objective of this report was to determine the presence of the P2X7 receptor (P2X7R) in healthy human cells of skeletal system, specifically osteoblasts (OBs), chondrocytes (Chs) and intervertebral disc (IVD) cells. This receptor is a member of the ATP-gated ion channel family, known to be a main sensor of extracellular ATP, the prototype of the danger signal released at sites of tissue damage, and a ubiquitous player in inflammation and cancer, including bone and cartilaginous tissues. Despite overwhelming data supporting a role in immune cell responses and tumor growth and progression, a complete picture of the pathophysiological functions of P2X7R, especially when expressed by non-immune cells, is lacking. Here we show that human wild-type P2X7R (P2X7A) was expressed in different samples of human osteoblasts, chondrocytes and intervertebral disc cells. By fluorescence microscopy (LM) and immunogold transmission electron microscopy we localized P2X7R not only in the canonical sites (plasma membrane and cytoplasm), but also in the nucleus of all the 3 cell types, especially IVD cells and OBs. P2X7R mitochondrial immunoreactivity was predominantly detected in OBs and IVD cells, but not in Chs. Evidence of subcellular localization of P2X7R may help to i. understand the participation of P2X7R in as yet unidentified signaling pathways in the joint and bone microenvironment, ii. identify pathologies associated with P2X7R mislocalization and iii. design specific targeted therapies.
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Affiliation(s)
- Letizia Penolazzi
- Department of Neuroscience and Rehabilitation, University of Ferrara, Ferrara, Italy
| | | | - Elisabetta Lambertini
- Department of Neuroscience and Rehabilitation, University of Ferrara, Ferrara, Italy
| | | | - Mario Tarantini
- Department of Medical Sciences, University of Ferrara, Ferrara, Italy
| | | | - Roberta Piva
- Department of Neuroscience and Rehabilitation, University of Ferrara, Ferrara, Italy
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11
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von Mücke-Heim IA, Deussing JM. The P2X7 receptor in mood disorders: Emerging target in immunopsychiatry, from bench to bedside. Neuropharmacology 2023; 224:109366. [PMID: 36470368 DOI: 10.1016/j.neuropharm.2022.109366] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Revised: 11/09/2022] [Accepted: 11/29/2022] [Indexed: 12/03/2022]
Abstract
Psychiatric disorders are among the most burdensome disorders worldwide. Though therapies have evolved over the last decades, treatment resistance still affects many patients. Recently, neuroimmune systems have been identified as important factors of mood disorder biology. The underlying dysregulation in neuroimmune cross-talk is driven by genetic risk factors and accumulating adverse environmental influences like chronic psychosocial stress. These result in a cluster of proinflammatory cytokines and quantitative and functional changes of immune cell populations (e.g., microglia, monocytes, T cells), varying by disease entity and state. Among the emerging immune targets, purinergic signalling revolving around the membranous and ATP specific P2X7 receptor (P2X7R) has gained wider attention and clinical studies making use of antagonistic drugs are on-going. Still, no clinically meaningful applications have been identified so far. A major problem is the often overly simplified approach taken to translate findings from bench to bedside. Therefore, the present review focuses on purinergic signalling via P2X7R in the context of recent advances in immunopsychiatric mood disorder research. Our aim is to provide an overview of the current P2X7R-related findings, from bench to bedside. First, we summarize the characteristics of purinergic signalling and P2X7R, followed by a depiction of genetic and clinical data connecting P2X7R to mood disorders. We close with our perspective on current developments and discuss changes necessary to translate the evident potential of P2X7R signalling modulation into meaningful clinical application. This article is part of the Special Issue on 'Purinergic Signaling: 50 years'.
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Affiliation(s)
| | - Jan M Deussing
- Max Planck Institute for Psychiatry, Molecular Neurogenetics, Munich, Germany.
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12
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Janho dit Hreich S, Juhel T, Hofman P, Vouret-Craviari V. Protocol for Evaluating In Vivo the Activation of the P2RX7 Immunomodulator. Biol Proced Online 2023; 25:1. [PMID: 36600200 PMCID: PMC9811721 DOI: 10.1186/s12575-022-00188-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Accepted: 12/13/2022] [Indexed: 01/06/2023] Open
Abstract
BACKGROUND P2RX7 is a purinergic receptor with pleiotropic activities that is activated by high levels of extracellular ATP that are found in inflamed tissues. P2RX7 has immunomodulatory and anti-tumor proprieties and is therefore a therapeutic target for various diseases. Several compounds are developed to either inhibit or enhance its activation. However, studying their effect on P2RX7's activities is limited to in vitro and ex vivo studies that require the use of unphysiological media that could affect its activation. Up to now, the only way to assess the activity of P2RX7 modulators on the receptor in vivo was in an indirect manner. RESULTS We successfully developed a protocol allowing the detection of P2RX7 activation in vivo in lungs of mice, by taking advantage of its unique macropore formation ability. The protocol is based on intranasal delivery of TO-PRO™-3, a non-permeant DNA intercalating dye, and fluorescence measurement by flow cytometry. We show that ATP enhances TO-PRO™-3 fluorescence mainly in lung immune cells of mice in a P2RX7-dependant manner. CONCLUSIONS The described approach has allowed the successful analysis of P2RX7 activity directly in the lungs of WT and transgenic C57BL6 mice. The provided detailed guidelines and recommendations will support the use of this protocol to study the potency of pharmacologic or biologic compounds targeting P2RX7.
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Affiliation(s)
- Serena Janho dit Hreich
- grid.463830.a0000 0004 8340 3111Université Côte d’Azur, CNRS, INSERM, IRCAN, 28 avenue de Valombrose, 06108 Nice, France ,grid.464719.90000 0004 0639 4696FHU OncoAge, Pasteur Hospital, 30 voie Romaine, 06001 Nice, France
| | - Thierry Juhel
- grid.463830.a0000 0004 8340 3111Université Côte d’Azur, CNRS, INSERM, IRCAN, 28 avenue de Valombrose, 06108 Nice, France
| | - Paul Hofman
- grid.463830.a0000 0004 8340 3111Université Côte d’Azur, CNRS, INSERM, IRCAN, 28 avenue de Valombrose, 06108 Nice, France ,grid.464719.90000 0004 0639 4696FHU OncoAge, Pasteur Hospital, 30 voie Romaine, 06001 Nice, France ,grid.464719.90000 0004 0639 4696Laboratory of Clinical and Experimental Pathology and Biobank, Pasteur Hospital, 30 voie Romaine, 06001 Nice, France ,grid.464719.90000 0004 0639 4696Hospital-Related Biobank (BB-0033-00025), Pasteur Hospital, 30 voie Romaine, 06001 Nice, France
| | - Valérie Vouret-Craviari
- grid.463830.a0000 0004 8340 3111Université Côte d’Azur, CNRS, INSERM, IRCAN, 28 avenue de Valombrose, 06108 Nice, France ,grid.464719.90000 0004 0639 4696FHU OncoAge, Pasteur Hospital, 30 voie Romaine, 06001 Nice, France
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Sadeghi S, Tehrani FR, Tahmasebi S, Shafiee A, Hashemi SM. Exosome engineering in cell therapy and drug delivery. Inflammopharmacology 2023; 31:145-169. [PMID: 36609717 PMCID: PMC9823267 DOI: 10.1007/s10787-022-01115-7] [Citation(s) in RCA: 77] [Impact Index Per Article: 77.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Accepted: 12/09/2022] [Indexed: 01/09/2023]
Abstract
Cell-derived exosomes have opened new horizons in modern therapy for advanced drug delivery and therapeutic applications, due to their key features such as low immunogenicity, high physicochemical stability, capacity to penetrate into tissues, and the innate capacity to communicate with other cells over long distances. Exosome-based liquid biopsy has been potentially used for the diagnosis and prognosis of a range of disorders. Exosomes deliver therapeutic agents, including immunological modulators, therapeutic drugs, and antisense oligonucleotides to certain targets, and can be used as vaccines, though their clinical application is still far from reality. Producing exosomes on a large-scale is restricted to their low circulation lifetime, weak targeting capacity, and inappropriate controls, which need to be refined before being implemented in practice. Several bioengineering methods have been used for refining therapeutic applications of exosomes and promoting their effectiveness, on the one hand, and addressing the existing challenges, on the other. In the short run, new diagnostic platforms and emerging therapeutic strategies will further develop exosome engineering and therapeutic potential. This requires a thorough analysis of exosome engineering approaches along with their merits and drawbacks, as outlined in this paper. The present study is a comprehensive review of novel techniques for exosome development in terms of circulation time in the body, targeting capacity, and higher drug loading/delivery efficacies.
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Affiliation(s)
- Somaye Sadeghi
- Reproductive Endocrinology Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
- Advanced Therapy Medicinal Product (ATMP) Department, Breast Cancer Research Center, Motamed Cancer Institute, ACECR, Tehran, Iran
| | - Fahimeh Ramezani Tehrani
- Reproductive Endocrinology Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
| | - Safa Tahmasebi
- Student Research Committee, Department of Immunology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Abbas Shafiee
- The University of Queensland Diamantina Institute, Faculty of Medicine, The University of Queensland, 37 Kent Street, Woolloongabba, Brisbane, QLD, 4102, Australia.
- Herston Biofabrication Institute, Metro North Hospital and Health Service, Brisbane, QLD 4029, Australia.
| | - Seyed Mahmoud Hashemi
- Department of Immunology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
- Medical Nanotechnology and tissue engineering Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
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Ng CY, Kee LT, Al-Masawa ME, Lee QH, Subramaniam T, Kok D, Ng MH, Law JX. Scalable Production of Extracellular Vesicles and Its Therapeutic Values: A Review. Int J Mol Sci 2022; 23:7986. [PMID: 35887332 PMCID: PMC9315612 DOI: 10.3390/ijms23147986] [Citation(s) in RCA: 36] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Revised: 07/14/2022] [Accepted: 07/15/2022] [Indexed: 02/07/2023] Open
Abstract
Extracellular vesicles (EVs) are minute vesicles with lipid bilayer membranes. EVs are secreted by cells for intercellular communication. Recently, EVs have received much attention, as they are rich in biological components such as nucleic acids, lipids, and proteins that play essential roles in tissue regeneration and disease modification. In addition, EVs can be developed as vaccines against cancer and infectious diseases, as the vesicle membrane has an abundance of antigenic determinants and virulent factors. EVs for therapeutic applications are typically collected from conditioned media of cultured cells. However, the number of EVs secreted by the cells is limited. Thus, it is critical to devise new strategies for the large-scale production of EVs. Here, we discussed the strategies utilized by researchers for the scalable production of EVs. Techniques such as bioreactors, mechanical stimulation, electrical stimulation, thermal stimulation, magnetic field stimulation, topographic clue, hypoxia, serum deprivation, pH modification, exposure to small molecules, exposure to nanoparticles, increasing the intracellular calcium concentration, and genetic modification have been used to improve the secretion of EVs by cultured cells. In addition, nitrogen cavitation, porous membrane extrusion, and sonication have been utilized to prepare EV-mimetic nanovesicles that share many characteristics with naturally secreted EVs. Apart from inducing EV production, these upscaling interventions have also been reported to modify the EVs' cargo and thus their functionality and therapeutic potential. In summary, it is imperative to identify a reliable upscaling technique that can produce large quantities of EVs consistently. Ideally, the produced EVs should also possess cargo with improved therapeutic potential.
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Affiliation(s)
- Chiew Yong Ng
- Centre for Tissue Engineering and Regenerative Medicine, Faculty of Medicine, University Kebangsaan Malaysia Medical Centre, Jalan Yaacob Latif, Kuala Lumpur 56000, Malaysia; (C.Y.N.); (L.T.K.); (M.E.A.-M.); (Q.H.L.); (T.S.); (D.K.); (M.H.N.)
| | - Li Ting Kee
- Centre for Tissue Engineering and Regenerative Medicine, Faculty of Medicine, University Kebangsaan Malaysia Medical Centre, Jalan Yaacob Latif, Kuala Lumpur 56000, Malaysia; (C.Y.N.); (L.T.K.); (M.E.A.-M.); (Q.H.L.); (T.S.); (D.K.); (M.H.N.)
| | - Maimonah Eissa Al-Masawa
- Centre for Tissue Engineering and Regenerative Medicine, Faculty of Medicine, University Kebangsaan Malaysia Medical Centre, Jalan Yaacob Latif, Kuala Lumpur 56000, Malaysia; (C.Y.N.); (L.T.K.); (M.E.A.-M.); (Q.H.L.); (T.S.); (D.K.); (M.H.N.)
| | - Qian Hui Lee
- Centre for Tissue Engineering and Regenerative Medicine, Faculty of Medicine, University Kebangsaan Malaysia Medical Centre, Jalan Yaacob Latif, Kuala Lumpur 56000, Malaysia; (C.Y.N.); (L.T.K.); (M.E.A.-M.); (Q.H.L.); (T.S.); (D.K.); (M.H.N.)
| | - Thayaalini Subramaniam
- Centre for Tissue Engineering and Regenerative Medicine, Faculty of Medicine, University Kebangsaan Malaysia Medical Centre, Jalan Yaacob Latif, Kuala Lumpur 56000, Malaysia; (C.Y.N.); (L.T.K.); (M.E.A.-M.); (Q.H.L.); (T.S.); (D.K.); (M.H.N.)
| | - David Kok
- Centre for Tissue Engineering and Regenerative Medicine, Faculty of Medicine, University Kebangsaan Malaysia Medical Centre, Jalan Yaacob Latif, Kuala Lumpur 56000, Malaysia; (C.Y.N.); (L.T.K.); (M.E.A.-M.); (Q.H.L.); (T.S.); (D.K.); (M.H.N.)
- Faculty of Applied Sciences, UCSI University, Jalan Menara Gading No. 1, Kuala Lumpur 56000, Malaysia
| | - Min Hwei Ng
- Centre for Tissue Engineering and Regenerative Medicine, Faculty of Medicine, University Kebangsaan Malaysia Medical Centre, Jalan Yaacob Latif, Kuala Lumpur 56000, Malaysia; (C.Y.N.); (L.T.K.); (M.E.A.-M.); (Q.H.L.); (T.S.); (D.K.); (M.H.N.)
| | - Jia Xian Law
- Centre for Tissue Engineering and Regenerative Medicine, Faculty of Medicine, University Kebangsaan Malaysia Medical Centre, Jalan Yaacob Latif, Kuala Lumpur 56000, Malaysia; (C.Y.N.); (L.T.K.); (M.E.A.-M.); (Q.H.L.); (T.S.); (D.K.); (M.H.N.)
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15
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Yang C, Zheng B, Wang R, Chang H, Liu P, Li B, Norvienyeku J, Chen Q. A Putative P-Type ATPase Regulates the Secretion of Hydrolytic Enzymes, Phospholipid Transport, Morphogenesis, and Pathogenesis in Phytophthora capsici. FRONTIERS IN PLANT SCIENCE 2022; 13:852500. [PMID: 35620687 PMCID: PMC9127794 DOI: 10.3389/fpls.2022.852500] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2022] [Accepted: 04/11/2022] [Indexed: 05/17/2023]
Abstract
Phytophthora capsici is an important plant pathogenic oomycete with multiple hosts. The P4-ATPases, aminophospholipid translocases (APTs), play essential roles in the growth and pathogenesis of fungal pathogens. However, the function of P4-ATPase in P. capsici remains unclear. This study identified and characterized PcApt1, a P4-ATPase Drs2 homolog, in P. capsici. Deletion of PcAPT1 by CRISPR/Cas9 knock-out strategy impaired hyphal growth, extracellular laccase activity. Cytological analyses have shown that PcApt1 participates in phosphatidylserine (PS) transport across the plasma membrane. Also, we showed that targeted deletion of PcAPT1 triggered a significant reduction in the virulence of P. capsici. Secretome analyses have demonstrated that secretion of hydrolytic enzymes decreased considerably in the PcAPT1 gene deletion strains compared to the wild-type. Overall, our results showed that PcApt1 plays a pivotal role in promoting morphological development, phospholipid transport, secretion of hydrolytic enzymes, and the pathogenicity of the polycyclic phytopathogenic oomycete P. capsici. This study underscores the need for comprehensive evaluation of subsequent members of the P-type ATPase family to provide enhanced insights into the dynamic contributions to the pathogenesis of P. capsici and their possible deployment in the formulation of effective control strategies.
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Affiliation(s)
- Chengdong Yang
- Key Laboratory of Green Prevention and Control of Tropical Plant Diseases and Pests, Ministry of Education, College of Plant Protection, Hainan University, Haikou, China
- Hainan Yazhou Bay Seed Laboratory, Sanya Nanfan Research Institute of Hainan University, Sanya, China
| | - Bowen Zheng
- Fujian Key Laboratory for Monitoring and Integrated Management of Crop Pests, Institute of Plant Protection, Fujian Academy of Agricultural Sciences, Fuzhou, China
| | - Rongbo Wang
- Fujian Key Laboratory for Monitoring and Integrated Management of Crop Pests, Institute of Plant Protection, Fujian Academy of Agricultural Sciences, Fuzhou, China
| | - Hongyang Chang
- Fujian Key Laboratory for Monitoring and Integrated Management of Crop Pests, Institute of Plant Protection, Fujian Academy of Agricultural Sciences, Fuzhou, China
| | - Peiqing Liu
- Fujian Key Laboratory for Monitoring and Integrated Management of Crop Pests, Institute of Plant Protection, Fujian Academy of Agricultural Sciences, Fuzhou, China
| | - Benjin Li
- Fujian Key Laboratory for Monitoring and Integrated Management of Crop Pests, Institute of Plant Protection, Fujian Academy of Agricultural Sciences, Fuzhou, China
| | - Justice Norvienyeku
- Key Laboratory of Green Prevention and Control of Tropical Plant Diseases and Pests, Ministry of Education, College of Plant Protection, Hainan University, Haikou, China
- Hainan Yazhou Bay Seed Laboratory, Sanya Nanfan Research Institute of Hainan University, Sanya, China
- Justice Norvienyeku,
| | - Qinghe Chen
- Key Laboratory of Green Prevention and Control of Tropical Plant Diseases and Pests, Ministry of Education, College of Plant Protection, Hainan University, Haikou, China
- Hainan Yazhou Bay Seed Laboratory, Sanya Nanfan Research Institute of Hainan University, Sanya, China
- Fujian Key Laboratory for Monitoring and Integrated Management of Crop Pests, Institute of Plant Protection, Fujian Academy of Agricultural Sciences, Fuzhou, China
- *Correspondence: Qinghe Chen,
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Kim OK, Nam DE, Hahn YS. The Pannexin 1/Purinergic Receptor P2X4 Pathway Controls the Secretion of MicroRNA-Containing Exosomes by HCV-Infected Hepatocytes. Hepatology 2021; 74:3409-3426. [PMID: 34218459 PMCID: PMC8639610 DOI: 10.1002/hep.32042] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Revised: 06/18/2021] [Accepted: 06/30/2021] [Indexed: 12/17/2022]
Abstract
BACKGROUND AND AIMS HCV infection is a major risk factor that can lead to chronic liver disease, including fibrosis, cirrhosis, and HCC. Progression of chronic liver disease by HCV infection is caused by a complex intercellular reaction. Especially, exosomes and microRNAs (miRNAs) from HCV-infected hepatocytes play a role in the pathogenesis of liver disease by facilitating cellular communication between parenchymal and nonparenchymal cells. However, the underlying mechanism of secretions of exosome and miRNAs during HCV infection is still open for study. APPROACH AND RESULTS In this study, we demonstrated a pathway for the release of exosome and exosomal miRNAs through caspase-3/pannexin 1 (Panx1)/P2X4 activation during HCV infection in hepatocytes. We found that HCV infection induced the stimulation of exosome release and activation of the caspase-3/Panx1/P2X4 pathway in Huh7.5.1 cells. In addition, miR-122 and miR-146a levels in extracellular exosomes from HCV-infected cells were dramatically increased whereas intracellular miR122 and miR-146a expression had no large changes. Notably, secretions of exosomes and exosomal miRNAs were decreased by inhibition of caspase 3, Panx1, and P2X4 whereas inhibition of ROCK-1 cleavage did not affect these during HCV infection in Huh7.5.1 cells. CONCLUSIONS These results suggested that HCV infection caused secretions of exosomes and exosomal miRNAs dependent on the caspase 3/Panx1/P2X4 pathway. Our study provides a possible therapeutic intervention using Panx1 suppression for liver disease development mediated by exosomes from HCV-infected hepatocytes.
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Affiliation(s)
- Ok-Kyung Kim
- Beirne B. Carter Center for Immunology Research, University of Virginia, Charlottesville, Virginia, USA,Division of Food and Nutrition, Chonnam National University, Gwangju, South Korea
| | - Da-eun Nam
- Beirne B. Carter Center for Immunology Research, University of Virginia, Charlottesville, Virginia, USA
| | - Young S. Hahn
- Beirne B. Carter Center for Immunology Research, University of Virginia, Charlottesville, Virginia, USA,Department of Microbiology, Immunology, and Cancer Biology, University of Virginia, Charlottesville, Virginia, USA
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Han J, Yoon S, Park H. Endocytic BDNF secretion regulated by Vamp3 in astrocytes. Sci Rep 2021; 11:21203. [PMID: 34707216 PMCID: PMC8551197 DOI: 10.1038/s41598-021-00693-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2021] [Accepted: 10/15/2021] [Indexed: 11/26/2022] Open
Abstract
Brain-derived neurotrophic factor (BDNF) regulates diverse brain functions via TrkB receptor signaling. Due to the expression of TrkB receptors, astrocytes can internalize extracellular BDNF proteins via receptor-mediated endocytosis. Endocytosed BDNF can be re-secreted upon stimulation, but the molecular mechanism underlying this phenomenon remains unrecognized. Our study reveals that vesicle-associated membrane protein 3 (Vamp3) selectively regulates the release of endocytic BDNF from astrocytes. By using quantum dot (QD)-conjugated mature BDNF (QD-BDNF) as a proxy for the extracellular BDNF protein, we monitored the uptake, transport, and secretion of BDNF from cultured cortical astrocytes. Our data showed that endocytic QD-BDNF particles were enriched in Vamp3-containing vesicles in astrocytes and that ATP treatment sufficiently triggered either the antero- or retrograde transport and exocytosis of QD-BDNF-containing vesicles. Downregulation of Vamp3 expression disrupted endocytic BDNF secretion from astrocytes but did not affect uptake or transport. Collectively, these results provide evidence of the selective ability of astrocytic Vamp3 to control endocytic BDNF secretion during BDNF recycling.
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Affiliation(s)
- Jeongho Han
- Research Group of Neurovascular Unit, Korea Brain Research Institute (KBRI), Daegu, 41062, South Korea
| | - Sungryeong Yoon
- Department of Brain and Cognitive Sciences, DGIST, Daegu, 42988, South Korea
| | - Hyungju Park
- Research Group of Neurovascular Unit, Korea Brain Research Institute (KBRI), Daegu, 41062, South Korea. .,Department of Brain and Cognitive Sciences, DGIST, Daegu, 42988, South Korea.
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18
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Penolazzi L, Bergamin LS, Lambertini E, Poma VV, Sarti AC, De Bonis P, Di Virgilio F, Piva R. The P2X7 purinergic receptor in intervertebral disc degeneration. J Cell Physiol 2021; 237:1418-1428. [PMID: 34668208 PMCID: PMC9298011 DOI: 10.1002/jcp.30611] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2021] [Revised: 09/08/2021] [Accepted: 10/04/2021] [Indexed: 11/07/2022]
Abstract
Mechanisms involved in the development of intervertebral disc (IVD) degeneration are only partially known, thus making the implementation of effective therapies very difficult. In this study, we investigated P2X7 purinergic receptor (P2X7R), NLRP3 inflammasome, and interleukin (IL)-1β expression in IVD specimens at different stages of disease progression, and during the in vitro dedifferentiation process of the primary cells derived thereof. We found that P2X7R, NLRP3, and IL-1β expression was higher in the IVD samples at a more advanced stage of degeneration and in the expanded IVD cells in culture which partially recapitulated the in vivo degeneration process. In IVD cells, the P2X7R showed a striking nuclear localization, while NLRP3 was mainly cytoplasmic. Stimulation with the semiselective P2X7R agonist benzoyl ATP together with lipopolysaccharide treatment triggered P2X7R transfer to the cytoplasm and P2X7R/NLRP3 colocalization. Taken together, these findings support pathophysiological evidence that the degenerated disc is a highly inflamed microenvironment and highlight the P2X7R/NLRP3 axis as a suitable therapeutic target. The immunohistochemical analysis and the assessment of subcellular localization revealed a substantial expression of P2X7R also in normal disc tissue. This gives us the opportunity to contribute to the few studies performed in natively expressed human P2X7R so far, and to understand the possible physiological ATP-mediated P2X7R homeostasis signaling. Therefore, collectively, our findings may offer a new perspective and pave the way for the exploration of a role of P2X7R-mediated purinergic signaling in IVD metabolism that goes beyond its involvement in inflammation.
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Affiliation(s)
- Letizia Penolazzi
- Department of Neuroscience and RehabilitationUniversity of FerraraFerraraItaly
| | | | | | | | - Alba C. Sarti
- Department of Medical SciencesUniversity of FerraraFerraraItaly
| | | | | | - Roberta Piva
- Department of Neuroscience and RehabilitationUniversity of FerraraFerraraItaly
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19
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Li T, Chen J, Zeng Z. Pathophysiological role of calcium channels and transporters in the multiple myeloma. Cell Commun Signal 2021; 19:99. [PMID: 34579758 PMCID: PMC8477534 DOI: 10.1186/s12964-021-00781-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2021] [Accepted: 08/28/2021] [Indexed: 12/11/2022] Open
Abstract
Multiple myeloma (MM) is a common malignant tumor of plasma cells. Despite several treatment approaches in the past two decades, MM remains an aggressive and incurable disease in dire need of new treatment strategies. Approximately 70–80% of patients with MM have myeloma bone disease (MBD), often accompanied by pathological fractures and hypercalcemia, which seriously affect the prognosis of the patients. Calcium channels and transporters can mediate Ca2+ balance inside and outside of the membrane, indicating that they may be closely related to the prognosis of MM. Therefore, this review focuses on the roles of some critical calcium channels and transporters in MM prognosis, which located in the plasma membrane, endoplasmic reticulum and mitochondria. The goal of this review is to facilitate the identification of new targets for the treatment and prognosis of MM.![]() Video Abstract
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Affiliation(s)
- Tingting Li
- Department of Hematology, The First Affiliated Hospital of Fujian Medical University, 20 Chazhong Road, Fuzhou, Fujian, 350005, People's Republic of China.,Fujian Key Laboratory of Laboratory Medicine, Fuzhou, People's Republic of China
| | - Junmin Chen
- Department of Hematology, The First Affiliated Hospital of Fujian Medical University, 20 Chazhong Road, Fuzhou, Fujian, 350005, People's Republic of China. .,Fujian Key Laboratory of Laboratory Medicine, Fuzhou, People's Republic of China.
| | - Zhiyong Zeng
- Department of Hematology, The First Affiliated Hospital of Fujian Medical University, 20 Chazhong Road, Fuzhou, Fujian, 350005, People's Republic of China. .,Fujian Key Laboratory of Laboratory Medicine, Fuzhou, People's Republic of China.
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20
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Ferrari D, la Sala A, Milani D, Celeghini C, Casciano F. Purinergic Signaling in Controlling Macrophage and T Cell Functions During Atherosclerosis Development. Front Immunol 2021; 11:617804. [PMID: 33664731 PMCID: PMC7921745 DOI: 10.3389/fimmu.2020.617804] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2020] [Accepted: 12/21/2020] [Indexed: 12/15/2022] Open
Abstract
Atherosclerosis is a hardening and narrowing of arteries causing a reduction of blood flow. It is a leading cause of death in industrialized countries as it causes heart attacks, strokes, and peripheral vascular disease. Pathogenesis of the atherosclerotic lesion (atheroma) relies on the accumulation of cholesterol-containing low-density lipoproteins (LDL) and on changes of artery endothelium that becomes adhesive for monocytes and lymphocytes. Immunomediated inflammatory response stimulated by lipoprotein oxidation, cytokine secretion and release of pro-inflammatory mediators, worsens the pathological context by amplifying tissue damage to the arterial lining and increasing flow-limiting stenosis. Formation of thrombi upon rupture of the endothelium and the fibrous cup may also occur, triggering thrombosis often threatening the patient’s life. Purinergic signaling, i.e., cell responses induced by stimulation of P2 and P1 membrane receptors for the extracellular nucleotides (ATP, ADP, UTP, and UDP) and nucleosides (adenosine), has been implicated in modulating the immunological response in atherosclerotic cardiovascular disease. In this review we will describe advancements in the understanding of purinergic modulation of the two main immune cells involved in atherogenesis, i.e., monocytes/macrophages and T lymphocytes, highlighting modulation of pro- and anti-atherosclerotic mediated responses of purinergic signaling in these cells and providing new insights to point out their potential clinical significance.
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Affiliation(s)
- Davide Ferrari
- Department of Life Science and Biotechnology, Section of Microbiology and Applied Pathology, University of Ferrara, Ferrara, Italy
| | - Andrea la Sala
- Certification Unit, Health Directorate, Bambino Gesù Pediatric Hospital, IRCCS, Rome, Italy
| | - Daniela Milani
- Department of Translational Medicine and LTTA Centre, University of Ferrara, Ferrara, Italy
| | - Claudio Celeghini
- Department of Translational Medicine and LTTA Centre, University of Ferrara, Ferrara, Italy
| | - Fabio Casciano
- Department of Translational Medicine and LTTA Centre, University of Ferrara, Ferrara, Italy
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21
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Shi L, Ma J, Deng Y, Chen C, Wang H, Cao P, Long X, Zeng M, Liu Z. Cold-inducible RNA-binding protein contributes to tissue remodeling in chronic rhinosinusitis with nasal polyps. Allergy 2021; 76:497-509. [PMID: 32198936 DOI: 10.1111/all.14287] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2019] [Revised: 03/05/2020] [Accepted: 03/10/2020] [Indexed: 12/12/2022]
Abstract
BACKGROUND Cold-inducible RNA-binding protein (CIRP) is a newly identified damage-associated molecular pattern molecule. Its roles beyond promoting inflammation and in human diseases are poorly understood. This study aimed to investigate the involvement of CIRP in chronic rhinosinusitis with nasal polyps (CRSwNP). METHODS Immunohistochemistry, quantitative RT-PCR, and ELISA were used to detect the expression of CIRP and matrix metalloproteinases (MMPs) in sinonasal mucosal samples and nasal secretions. Human nasal epithelial cells (HNECs) and THP-1 cells, a human monocytic/macrophage cell line, were cultured to explore the regulation of CIRP expression and MMP expression. RESULTS Cytoplasmic CIRP expression in nasal epithelial cells and CD68+ macrophages in sinonasal tissues, and CIRP levels in nasal secretions were significantly increased in both patients with eosinophilic and noneosinophilic CRSwNP as compared to those in control subjects. IL-4, IL-13, IL-10, IL-17A, TNF-α, Dermatophagoides pteronyssinus group 1, and lipopolysaccharide induced the production and secretion of CIRP from HNECs and macrophages differentiated from THP-1 cells. CIRP promoted MMP2, MMP7, MMP9, MMP12, and vascular endothelial growth factor A (VEGF-A) production from HNECs, macrophages differentiated from THP-1 cells, and polyp tissues, which was inhibited by the blocking antibody for Toll-like receptor 4, but not advanced glycation end products. The expression of MMPs and VEGF-A in tissues correlated with CIRP levels in nasal secretions in patients with CRSwNP. CONCLUSIONS The upregulated production and release of CIRP from nasal epithelial cells and macrophages may contribute to the edema formation in both eosinophilic and noneosinophilic CRSwNP by inducing MMP and VEGF-A production from epithelial cells and macrophages.
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Affiliation(s)
- Li‐Li Shi
- Department of Otolaryngology‐Head and Neck Surgery Tongji Hospital Tongji Medical College Huazhong University of Science and Technology Wuhan China
| | - Jin Ma
- Department of Otolaryngology‐Head and Neck Surgery Tongji Hospital Tongji Medical College Huazhong University of Science and Technology Wuhan China
| | - Yi‐Ke Deng
- Department of Otolaryngology‐Head and Neck Surgery Tongji Hospital Tongji Medical College Huazhong University of Science and Technology Wuhan China
| | - Cai‐Ling Chen
- Department of Otolaryngology‐Head and Neck Surgery Tongji Hospital Tongji Medical College Huazhong University of Science and Technology Wuhan China
| | - Heng Wang
- Department of Otolaryngology‐Head and Neck Surgery Tongji Hospital Tongji Medical College Huazhong University of Science and Technology Wuhan China
| | - Ping‐Ping Cao
- Department of Otolaryngology‐Head and Neck Surgery Tongji Hospital Tongji Medical College Huazhong University of Science and Technology Wuhan China
| | - Xiao‐Bo Long
- Department of Otolaryngology‐Head and Neck Surgery Tongji Hospital Tongji Medical College Huazhong University of Science and Technology Wuhan China
| | - Ming Zeng
- Department of Otolaryngology‐Head and Neck Surgery Tongji Hospital Tongji Medical College Huazhong University of Science and Technology Wuhan China
| | - Zheng Liu
- Department of Otolaryngology‐Head and Neck Surgery Tongji Hospital Tongji Medical College Huazhong University of Science and Technology Wuhan China
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22
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P2X7 receptor and the NLRP3 inflammasome: Partners in crime. Biochem Pharmacol 2020; 187:114385. [PMID: 33359010 DOI: 10.1016/j.bcp.2020.114385] [Citation(s) in RCA: 90] [Impact Index Per Article: 22.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2020] [Revised: 12/16/2020] [Accepted: 12/17/2020] [Indexed: 12/13/2022]
Abstract
Adenosine triphosphate (ATP) is a molecule that on one hand plays a central role in cellular energetics and which on the other is a ubiquitous signaling molecule when released into the extracellular media. Extracellular ATP accumulates in inflammatory environments where it acts as a damage-associated molecular pattern and activates the purinergic P2X receptor 7 (P2X7) in immune cells. P2X7 receptor activation induces the formation of the nucleotide-binding domain, leucine-rich-containing family, pyrin domain-containing 3 (NLRP3) inflammasome and the activation of the inflammatory caspase-1. Caspase-1 causes an inflammatory type of cell death called pyroptosis through the release of pro-inflammatory cytokines and intracellular content. Consequently, intense research efforts have been devoted to the design of novel anti-inflammatory therapies, focusing in particular on the P2X7 receptor and the NLRP3 pathway and the introduction of new blocking molecules in early phase clinical trials.
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Zhou R, Wang L, Zhao G, Chen D, Song X, Momtazi-Borojeni AA, Yuan H. Circulating exosomal microRNAs as emerging non-invasive clinical biomarkers in heart failure: Mega bio-roles of a nano bio-particle. IUBMB Life 2020; 72:2546-2562. [PMID: 33053610 DOI: 10.1002/iub.2396] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2020] [Revised: 09/22/2020] [Accepted: 10/02/2020] [Indexed: 12/12/2022]
Abstract
Exosomes are nano-sized extracellular vesicles containing a cell-specific biologically active cargo of proteins and genetic materials. Exosomes are constitutively released from almost all cell-types and affect neighboring or distant cells through a complex intercellular exchange of the genetic information and/or regulation of certain gene expressions that change the function and behavior of recipient cells. Those released into body fluids are the major mediators of intercellular communications. The success of the biological functions of exosomes is highly mediated by the effective transfer of microRNAs (miRs). Exosomes secreted by a damaged or diseased heart can exhibit alterations in the miRs' profile that may reflect the cellular origin and (patho)physiological state, as a "signature" or "fingerprint" of the donor cell. It has been shown that the transportation of cardiac-specific miRs in exosomes can be rapidly detected and measured, holding great potential as biomarkers in heart diseases. Currently, the search for new biomarkers of heart diseases remains a large and increasing enterprise. Notably, circulating exosomal miRs (Exo-miRs) have successfully gained huge interests for their diagnostic and prognostic potentials. The present review highlights circulating Exo-miRs explored for diagnosis/prognosis and outcome prediction in patients with heart failure (HF). To this end, we explain the feasibility of exosomes as clinical biomarkers, discuss the priority of circulating Exo-miRs over non-exosomal ones as a biomarker, and then outline reported circulating Exo-miRs having the biomarker function in HF patients, together with their mechanism of action. In conclusion, circulating Exo-miRs represent emerging diagnostic (Exo-miR-92b-5p, Exo-miR-146a, Exo-miR-181c, and Exo-miR-495) and prognostic (Exo-miR-192, Exo-miR-194, Exo-miR-34a, Exo-miR-425, Exo-miR-744) biomarkers for HF.
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Affiliation(s)
- Runfa Zhou
- Department of Cardiology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong, China.,Shandong Provincial Hospital, Shandong First Medical University & Shandong Academy of Medical Sciences, Jinan, Shandong, China
| | - Leiyan Wang
- Clinical Skill Training Center, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong, China
| | - Gang Zhao
- Department of Cardiology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong, China
| | - Dan Chen
- Department of Cardiology Electrocardiogram Room, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong, China
| | - Xiaoning Song
- Department of Cardiology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong, China.,Shandong Provincial Hospital, Shandong First Medical University & Shandong Academy of Medical Sciences, Jinan, Shandong, China
| | - Amir A Momtazi-Borojeni
- Department of Medical Biotechnology, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Haitao Yuan
- Department of Cardiology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong, China
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24
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Man K, Brunet MY, Jones MC, Cox SC. Engineered Extracellular Vesicles: Tailored-Made Nanomaterials for Medical Applications. NANOMATERIALS (BASEL, SWITZERLAND) 2020; 10:E1838. [PMID: 32942556 PMCID: PMC7558114 DOI: 10.3390/nano10091838] [Citation(s) in RCA: 58] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/17/2020] [Revised: 09/07/2020] [Accepted: 09/10/2020] [Indexed: 02/07/2023]
Abstract
Extracellular vesicles (EVs) are emerging as promising nanoscale therapeutics due to their intrinsic role as mediators of intercellular communication, regulating tissue development and homeostasis. The low immunogenicity and natural cell-targeting capabilities of EVs has led to extensive research investigating their potential as novel acellular tools for tissue regeneration or for the diagnosis of pathological conditions. However, the clinical use of EVs has been hindered by issues with yield and heterogeneity. From the modification of parental cells and naturally-derived vesicles to the development of artificial biomimetic nanoparticles or the functionalisation of biomaterials, a multitude of techniques have been employed to augment EVs therapeutic efficacy. This review will explore various engineering strategies that could promote EVs scalability and therapeutic effectiveness beyond their native utility. Herein, we highlight the current state-of-the-art EV-engineering techniques with discussion of opportunities and obstacles for each. This is synthesised into a guide for selecting a suitable strategy to maximise the potential efficacy of EVs as nanoscale therapeutics.
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Affiliation(s)
- Kenny Man
- School of Chemical Engineering, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK; (K.M.); (M.Y.B.)
| | - Mathieu Y. Brunet
- School of Chemical Engineering, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK; (K.M.); (M.Y.B.)
| | - Marie-Christine Jones
- School of Pharmacy, Institute of Clinical Sciences, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK;
| | - Sophie C. Cox
- School of Chemical Engineering, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK; (K.M.); (M.Y.B.)
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25
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Ruan Z, Delpech JC, Venkatesan Kalavai S, Van Enoo AA, Hu J, Ikezu S, Ikezu T. P2RX7 inhibitor suppresses exosome secretion and disease phenotype in P301S tau transgenic mice. Mol Neurodegener 2020; 15:47. [PMID: 32811520 PMCID: PMC7436984 DOI: 10.1186/s13024-020-00396-2] [Citation(s) in RCA: 71] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2020] [Accepted: 08/07/2020] [Indexed: 12/21/2022] Open
Abstract
Background Neuronal accumulation of misfolded microtubule-associated protein tau is a hallmark of neuropathology in Alzheimer’s disease, frontotemporal dementia, and other tauopathies, and has been a therapeutic target. Microglia can spread tau pathology by secreting tau-containing exosomes, although the specific molecular target is yet to be identified for the therapeutic intervention. P2X purinoceptor 7 (P2RX7) is an ATP-gated cation channel, enriched in microglia and triggers exosome secretion. The purpose of the study is to examine the therapeutic effect of an orally applicable, CNS-penetrant P2RX7 specific inhibitor on the early disease stage of a tauopathy mouse model. Methods Three-months-old P301S tau mice were treated with P2RX7-specific inhibitor GSK1482160 or vehicle for 30 days, followed by behavioral, biochemical and immunohistochemical assessment. GSK1482160 was also tested for exosome secretion from primary cultured murine astrocytes, neurons and microglia in vitro. Results Oral administration of GSK1482160 significantly reduced accumulation of MC1+ and Alz50+ misfolded tau in hippocampal regions, which was accompanied with reduced accumulation of Tsg101, an exosome marker, in hippocampal neurons. Proximity ligation assay demonstrated complex formation of Alz50+ tau and Tsg101 in hippocampal neurons, which was reduced by GSK1482160. On the other hand, GSK1482160 had no effect on microglial ramification or CD68 expression, which was significantly enhanced in P301S mice, or pro/anti-inflammatory cytokine gene expression. Strikingly, GSK1482160-treated P301S mice show significantly improved working and contextual memory as determined by Y-maze and fear conditioning tests. GSK1482160 also significantly increased accumulation of Tsg101 and CD81 in microglia in vivo, suggesting its suppression of P2RX7-induced exosome secretion from microglia. This effect was confirmed in vitro, as ATP-induced secretion of tau-containing exosome was significantly suppressed by GSK1482160 treatment from primary murine microglia, but not from neurons or astrocytes. Discussion The oral administration of P2RX7 inhibition mitigates disease phenotypes in P301S mice, likely by suppressing release of microglial exosomes. P2RX7 could be a novel therapeutic target for the early stage tauopathy development.
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Affiliation(s)
- Zhi Ruan
- Department of Pharmacology & Experimental Therapeutics, Boston University School of Medicine, 72 East Concord St, L-606B, Boston, MA, 02118, USA
| | - Jean-Christophe Delpech
- Department of Pharmacology & Experimental Therapeutics, Boston University School of Medicine, 72 East Concord St, L-606B, Boston, MA, 02118, USA
| | - Srinidhi Venkatesan Kalavai
- Department of Pharmacology & Experimental Therapeutics, Boston University School of Medicine, 72 East Concord St, L-606B, Boston, MA, 02118, USA
| | - Alicia A Van Enoo
- Department of Pharmacology & Experimental Therapeutics, Boston University School of Medicine, 72 East Concord St, L-606B, Boston, MA, 02118, USA
| | - Jianqiao Hu
- Department of Pharmacology & Experimental Therapeutics, Boston University School of Medicine, 72 East Concord St, L-606B, Boston, MA, 02118, USA
| | - Seiko Ikezu
- Department of Pharmacology & Experimental Therapeutics, Boston University School of Medicine, 72 East Concord St, L-606B, Boston, MA, 02118, USA
| | - Tsuneya Ikezu
- Department of Pharmacology & Experimental Therapeutics, Boston University School of Medicine, 72 East Concord St, L-606B, Boston, MA, 02118, USA. .,Alzheimer's Disease Center, Boston University School of Medicine, Boston, MA, 02118, USA. .,Center for Systems Neuroscience, Boston University, Boston, MA, 02118, USA. .,Neurology, Boston University School of Medicine, 72 East Concord St, L-606B, Boston, MA, 02118, USA.
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26
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Lara R, Adinolfi E, Harwood CA, Philpott M, Barden JA, Di Virgilio F, McNulty S. P2X7 in Cancer: From Molecular Mechanisms to Therapeutics. Front Pharmacol 2020; 11:793. [PMID: 32581786 PMCID: PMC7287489 DOI: 10.3389/fphar.2020.00793] [Citation(s) in RCA: 102] [Impact Index Per Article: 25.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2020] [Accepted: 05/13/2020] [Indexed: 12/18/2022] Open
Abstract
P2X7 is a transmembrane receptor expressed in multiple cell types including neurons, dendritic cells, macrophages, monocytes, B and T cells where it can drive a wide range of physiological responses from pain transduction to immune response. Upon activation by its main ligand, extracellular ATP, P2X7 can form a nonselective channel for cations to enter the cell. Prolonged activation of P2X7, via high levels of extracellular ATP over an extended time period can lead to the formation of a macropore, leading to depolarization of the plasma membrane and ultimately to cell death. Thus, dependent on its activation state, P2X7 can either drive cell survival and proliferation, or induce cell death. In cancer, P2X7 has been shown to have a broad range of functions, including playing key roles in the development and spread of tumor cells. It is therefore unsurprising that P2X7 has been reported to be upregulated in several malignancies. Critically, ATP is present at high extracellular concentrations in the tumor microenvironment (TME) compared to levels observed in normal tissues. These high levels of ATP should present a survival challenge for cancer cells, potentially leading to constitutive receptor activation, prolonged macropore formation and ultimately to cell death. Therefore, to deliver the proven advantages for P2X7 in driving tumor survival and metastatic potential, the P2X7 macropore must be tightly controlled while retaining other functions. Studies have shown that commonly expressed P2X7 splice variants, distinct SNPs and post-translational receptor modifications can impair the capacity of P2X7 to open the macropore. These receptor modifications and potentially others may ultimately protect cancer cells from the negative consequences associated with constitutive activation of P2X7. Significantly, the effects of both P2X7 agonists and antagonists in preclinical tumor models of cancer demonstrate the potential for agents modifying P2X7 function, to provide innovative cancer therapies. This review summarizes recent advances in understanding of the structure and functions of P2X7 and how these impact P2X7 roles in cancer progression. We also review potential therapeutic approaches directed against P2X7.
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Affiliation(s)
- Romain Lara
- Biosceptre (UK) Limited, Cambridge, United Kingdom
| | - Elena Adinolfi
- Department of Medical Sciences, University of Ferrara, Ferrara, Italy
| | - Catherine A Harwood
- Centre for Cell Biology and Cutaneous Research, Barts and the London School of Medicine and Dentistry, Queen Mary University of London, London, United Kingdom
| | - Mike Philpott
- Centre for Cutaneous Research, Blizard Institute, Bart's & The London School of Medicine and Dentistry, Queen Mary University of London, London, United Kingdom
| | | | - Francesco Di Virgilio
- Department of Morphology, Surgery and Experimental Medicine, Section of Pathology, Oncology and Experimental Biology, University of Ferrara, Ferrara, Italy
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27
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Jadli AS, Ballasy N, Edalat P, Patel VB. Inside(sight) of tiny communicator: exosome biogenesis, secretion, and uptake. Mol Cell Biochem 2020; 467:77-94. [PMID: 32088833 DOI: 10.1007/s11010-020-03703-z] [Citation(s) in RCA: 137] [Impact Index Per Article: 34.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2019] [Accepted: 02/14/2020] [Indexed: 01/07/2023]
Abstract
Discovered in the late 1980s as an extracellular vesicle of endosomal origin secreted from reticulocytes, exosomes recently gained scientific attention due to its role in intercellular communication. Exosomes have now been identified to carry cell-specific cargo of nucleic acids, proteins, lipids, and other biologically active molecules. Exosomes can be selectively taken up by neighboring or distant cells, which has shown to result in structural and functional responses in the recipient cells. Recent advances indicate the regulation of exosomes at various steps, including their biogenesis, selection of their cargo, as well as cell-specific uptake. This review will shed light on the differences between the type of extracellular vesicles. In this review, we discuss the recent progress in our understanding of the regulation of exosome biogenesis, secretion, and uptake.
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Affiliation(s)
- Anshul S Jadli
- Department of Physiology and Pharmacology, Cumming School of Medicine, The University of Calgary, HMRB-53, 3330 Hospital Drive NW, Calgary, AB, T2N 4N1, Canada.,Libin Cardiovascular Institute of Alberta, The University of Calgary, HMRB-71, 3330 Hospital Drive NW, Calgary, AB, T2N 4N1, Canada
| | - Noura Ballasy
- Department of Physiology and Pharmacology, Cumming School of Medicine, The University of Calgary, HMRB-53, 3330 Hospital Drive NW, Calgary, AB, T2N 4N1, Canada.,Libin Cardiovascular Institute of Alberta, The University of Calgary, HMRB-71, 3330 Hospital Drive NW, Calgary, AB, T2N 4N1, Canada
| | - Pariya Edalat
- Department of Physiology and Pharmacology, Cumming School of Medicine, The University of Calgary, HMRB-53, 3330 Hospital Drive NW, Calgary, AB, T2N 4N1, Canada.,Libin Cardiovascular Institute of Alberta, The University of Calgary, HMRB-71, 3330 Hospital Drive NW, Calgary, AB, T2N 4N1, Canada
| | - Vaibhav B Patel
- Department of Physiology and Pharmacology, Cumming School of Medicine, The University of Calgary, HMRB-53, 3330 Hospital Drive NW, Calgary, AB, T2N 4N1, Canada. .,Libin Cardiovascular Institute of Alberta, The University of Calgary, HMRB-71, 3330 Hospital Drive NW, Calgary, AB, T2N 4N1, Canada.
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28
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Kim H, Kim D, Nam H, Moon S, Kwon YJ, Lee JB. Engineered extracellular vesicles and their mimetics for clinical translation. Methods 2019; 177:80-94. [PMID: 31626895 DOI: 10.1016/j.ymeth.2019.10.005] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2019] [Revised: 10/08/2019] [Accepted: 10/11/2019] [Indexed: 12/12/2022] Open
Abstract
Cells secrete extracellular vesicles (EVs) to external environments to achieve cellular homeostasis and cell-to-cell communication. Their therapeutic potential has been constantly spotlighted since they mirror both cytoplasmic and membranous components of parental cells. Meanwhile, growing evidence suggests that EV engineering could further promote EVs with a maximized capacity. In this review, a range of engineering techniques as well as upscaling approaches to exploit EVs and their mimetics are introduced. By laying out the pros and cons of each technique from different perspectives, we sought to provide an overview potentially helpful for understanding the current state of the art EV engineering and a guideline for choosing a suitable technique for engineering EVs. Furthermore, we envision that the advances in each technique will give rise to the combinatorial engineering of EVs, taking us a step closer to a clinical translation of EV-based therapeutics.
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Affiliation(s)
- Hyejin Kim
- Department of Chemical Engineering, University of Seoul, 163 Seoulsiripdaero, Dongdaemungu, Seoul 02504, Republic of Korea
| | - Dajeong Kim
- Department of Chemical Engineering, University of Seoul, 163 Seoulsiripdaero, Dongdaemungu, Seoul 02504, Republic of Korea
| | - Hyangsu Nam
- Department of Chemical Engineering, University of Seoul, 163 Seoulsiripdaero, Dongdaemungu, Seoul 02504, Republic of Korea
| | - Sunghyun Moon
- Department of Chemical Engineering, University of Seoul, 163 Seoulsiripdaero, Dongdaemungu, Seoul 02504, Republic of Korea
| | - Young Jik Kwon
- Department of Chemical Engineering and Materials Science, University of California, Irvine, CA 92697, United States; Department of Molecular Biology and Biochemistry, University of California, Irvine, CA 92697, United States; Department of Pharmaceutical Sciences, University of California, Irvine, CA 92697, United States; Department of Biomedical Engineering, University of California, Irvine, CA 92697, United States.
| | - Jong Bum Lee
- Department of Chemical Engineering, University of Seoul, 163 Seoulsiripdaero, Dongdaemungu, Seoul 02504, Republic of Korea.
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29
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Kanellopoulos JM, Delarasse C. Pleiotropic Roles of P2X7 in the Central Nervous System. Front Cell Neurosci 2019; 13:401. [PMID: 31551714 PMCID: PMC6738027 DOI: 10.3389/fncel.2019.00401] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2019] [Accepted: 08/19/2019] [Indexed: 12/16/2022] Open
Abstract
The purinergic receptor P2X7 is expressed in neural and immune cells known to be involved in neurological diseases. Its ligand, ATP, is a signaling molecule that can act as a neurotransmitter in physiological conditions or as a danger signal when released in high amount by damaged/dying cells or activated glial cells. Thus, ATP is a danger-associated molecular pattern. Binding of ATP by P2X7 leads to the activation of different biochemical pathways, depending on the physiological or pathological environment. The aim of this review is to discuss various functions of P2X7 in the immune and central nervous systems. We present evidence that P2X7 may have a detrimental or beneficial role in the nervous system, in the context of neurological pathologies: epilepsy, Alzheimer’s disease, multiple sclerosis, amyotrophic lateral sclerosis, age-related macular degeneration and cerebral artery occlusion.
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Affiliation(s)
| | - Cécile Delarasse
- Inserm, Sorbonne Université, CNRS, Institut de la Vision, Paris, France
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30
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Cui X, Wan B, Yang Y, Xin Y, Xie YC, Guo LH, Mantell LL. Carbon Nanomaterials Stimulate HMGB1 Release From Macrophages and Induce Cell Migration and Invasion. Toxicol Sci 2019; 172:398-410. [DOI: 10.1093/toxsci/kfz190] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
Abstract
Carbon nanomaterials (CNMs) are widely used in industrial and medical sectors. The increasing exposure of CNMs necessitates the studies of their potential environmental and health effects. High-mobility group box-1 (HMGB1) is a nuclear DNA-binding protein, but when released from cells, may cause sustained inflammatory response and promote cell migration and invasion. In this work, we found that 7-day exposure of 2.5 mg/kg/day CNMs, including C60, single-walled carbon nanotubes, and graphene oxides significantly elevated the level of HMGB1 in blood and lung lavage fluids in C57BL/6 mice. Subsequently, cellular effects and underlying mechanism were explored by using Raw264.7. The results showed that noncytotoxic CNMs enhanced HMGB1 intracellular translocation and release via activating P2X7 receptor. Released HMGB1 further activated receptor for advanced glycation endproducts (RAGE) and downstream signaling pathway by upregulating RAGE and Rac1 expression. Simultaneously, CNMs prepared the cells for migration and invasion by modulating MMP2 and TIMP2 gene expression as well as cytoskeleton reorganization. Intriguingly, released HMGB1 from macrophages promoted the migration of nearby lung cancer cell, which can be efficiently inhibited by neutralizing antibodies against HMGB1 and RAGE. Taken together, our work demonstrated that CNMs stimulated HMGB1 release and cell migration/invasion through P2X7R-HMGB1-RAGE pathway. The revealed mechanisms might facilitate a better understanding on the inflammatory property and subsequent cell functional alteration of CNMs.
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Affiliation(s)
- Xuejing Cui
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Bin Wan
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yu Yang
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Yan Xin
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yi-Chun Xie
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Liang-Hong Guo
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Lin L Mantell
- Department of Pharmaceutical Sciences, St. John's University College of Pharmacy, Queens, NY 11439
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31
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Kopp R, Krautloher A, Ramírez-Fernández A, Nicke A. P2X7 Interactions and Signaling - Making Head or Tail of It. Front Mol Neurosci 2019; 12:183. [PMID: 31440138 PMCID: PMC6693442 DOI: 10.3389/fnmol.2019.00183] [Citation(s) in RCA: 156] [Impact Index Per Article: 31.2] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Accepted: 07/11/2019] [Indexed: 12/14/2022] Open
Abstract
Extracellular adenine nucleotides play important roles in cell-cell communication and tissue homeostasis. High concentrations of extracellular ATP released by dying cells are sensed as a danger signal by the P2X7 receptor, a non-specific cation channel. Studies in P2X7 knockout mice and numerous disease models have demonstrated an important role of this receptor in inflammatory processes. P2X7 activation has been shown to induce a variety of cellular responses that are not usually associated with ion channel function, for example changes in the plasma membrane composition and morphology, ectodomain shedding, activation of lipases, kinases, and transcription factors, as well as cytokine release and apoptosis. In contrast to all other P2X family members, the P2X7 receptor contains a long intracellular C-terminus that constitutes 40% of the whole protein and is considered essential for most of these effects. So far, over 50 different proteins have been identified to physically interact with the P2X7 receptor. However, few of these interactions have been confirmed in independent studies and for the majority of these proteins, the interaction domains and the physiological consequences of the interactions are only poorly described. Also, while the structure of the P2X7 extracellular domain has recently been resolved, information about the organization and structure of its C-terminal tail remains elusive. After shortly describing the structure and assembly of the P2X7 receptor, this review gives an update of the identified or proposed interaction domains within the P2X7 C-terminus, describes signaling pathways in which this receptor has been involved, and provides an overlook of the identified interaction partners.
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Affiliation(s)
- Robin Kopp
- Walther Straub Institute of Pharmacology and Toxicology, Faculty of Medicine, LMU Munich, Munich, Germany
| | - Anna Krautloher
- Walther Straub Institute of Pharmacology and Toxicology, Faculty of Medicine, LMU Munich, Munich, Germany
| | - Antonio Ramírez-Fernández
- Walther Straub Institute of Pharmacology and Toxicology, Faculty of Medicine, LMU Munich, Munich, Germany
| | - Annette Nicke
- Walther Straub Institute of Pharmacology and Toxicology, Faculty of Medicine, LMU Munich, Munich, Germany
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32
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Lu YB, Chen CX, Huang J, Tian YX, Xie X, Yang P, Wu M, Tang C, Zhang WP. Nicotinamide phosphoribosyltransferase secreted from microglia via exosome during ischemic injury. J Neurochem 2019; 150:723-737. [PMID: 31269239 DOI: 10.1111/jnc.14811] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2018] [Revised: 06/12/2019] [Accepted: 06/24/2019] [Indexed: 02/06/2023]
Abstract
Nicotinamide phosphoribosyltransferase (NAMPT) is the key enzyme of the salvage pathway of nicotinamide adenine dinucleotide synthesis. NAMPT can also be secreted and functions as a cytokine. We have previously shown that in the brain, NAMPT expression and secretion can be induced in microglia upon neuroinflammation and injury. Yet the mechanism for NAMPT secretion remains unclear. Here we show that NAMPT can be actively secreted from microglia upon the treatment of ischemia-like injury - oxygen-glucose deprivation and recovery (OGD/R). We confirmed that classical ER-Golgi pathway is not involved in NAMPT secretion. NAMPT secretion was further enhanced by ATP, and the secretion was mediated by P2X7 receptor and by intracellular Ca2+ . Importantly, we found that phospholipase D inhibitor, n-butanol, phospholipase D siRNA, and wortmannin significantly decreased OGD/R-induced and ATP-enhanced release of NAMPT in microglia. After excluding the mechanisms of involving secretory autophagy, endosomes, and secretory lysosome, we have concluded that microglial NAMPT is secreted mainly via exosome. Immune-electron microscopy identifies NAMPT in extracellular vesicles with the size and morphology characteristic of exosome. With the vesicles harvested by ultra-centrifugation, exosomal NAMPT is further confirmed by Western blotting analysis. Intriguingly, the amount of NAMPT relative to exosomal protein markers remains unchanged upon the treatment of OGD/R, suggesting a constant load of exosomal NAMPT in microglia. Taken together, we have identified NAMPT is actively secreted via exosome from microglia during neuroinflammation of ischemic injury.
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Affiliation(s)
- Yun-Bi Lu
- Department of Pharmacology, Key Laboratory of Medical Neurobiology of Ministry of Health of China, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Chen-Xiang Chen
- Department of Pharmacology, Key Laboratory of Medical Neurobiology of Ministry of Health of China, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Jing Huang
- Department of Pharmacy, Affiliated Hospital of Medical School of Ningbo University, Ningbo, Zhejiang, China
| | - Yu-Xin Tian
- Department of Pharmacology, Key Laboratory of Medical Neurobiology of Ministry of Health of China, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Xian Xie
- Department of Pharmacology, Key Laboratory of Medical Neurobiology of Ministry of Health of China, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Ping Yang
- Core Medical Imaging Facility, Zhejiang University School of Medicine, Zhejiang, China
| | - Ming Wu
- Department of Thoracic Surgery, the Second Affiliated Hospital of Zhejiang University School of Medicine, Zhejiang, China
| | - Chun Tang
- CAS Key Laboratory of Magnetic Resonance in Biological Systems, State Key Laboratory of Magnetic Resonance and Atomic Molecular Physics, Wuhan Institute of Physics and Mathematics of the Chinese Academy of Sciences, Wuhan, Hubei, China
| | - Wei-Ping Zhang
- Department of Pharmacology, Key Laboratory of Medical Neurobiology of Ministry of Health of China, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China.,Zhejiang Province Key Laboratory of Mental Disorder's Management, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
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Tramentozzi E, Finotti P. Effects of purine-scaffold inhibitors on HUVECs: Involvement of the purinergic pathway and interference with ATP. Implications for preventing the adverse effects of extracellular Grp94. Biochem Biophys Rep 2019; 19:100661. [PMID: 31317075 PMCID: PMC6611975 DOI: 10.1016/j.bbrep.2019.100661] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2018] [Revised: 06/13/2019] [Accepted: 06/22/2019] [Indexed: 12/30/2022] Open
Abstract
Background Extracellular Glucose-regulated protein94 (Grp94) is linked to pathological conditions disrupting the obligatory intracellular location of this Heat Shock Protein (HSP). In plasma, Grp94 is linked to IgG in complexes that drive adverse effects on vascular cells and are biomarker of gastro-intestinal cancer. By blocking ATP site in different HSPs, purine-scaffold inhibitors are used as promising anti-cancer compounds, but their effects on vasculature are not known. Methods We tested the capacity of two purine-scaffold inhibitors, PU-H71 and PU-WS13, to prevent the binding of Grp94 to IgG and to antagonize the effects of Grp94 and native Grp94-IgG complexes on HUVECs in different experimental conditions. Results PU-H71 and PU-WS13 blocked Grp94 and the formation of Grp94-IgG complexes in absence of cells. Instead, in presence of HUVECs rather than Grp94 PU-inhibitors targeted cells causing stimulation of Akt and VEGF pathways and displaying angiogenic-like effects similar to, although less intense than that provoked by Grp94 and Grp94-IgG complexes. Unlike Grp94 and Grp94-IgG complexes, PU-inhibitors also activated the purinergic pathway and increased the expression of the ATP receptor P2X7. Effects of PU-inhibitors on HUVECs were reversed by ATP and in presence of ATP PU-inhibitors were again able to block Grp94. Conclusions PU-inhibitors can display direct effects on endothelial cells by targeting the ATP receptor P2X7. In absence of ATP, PU-inhibitors preferentially bind to cells rather than Grp94. ATP antagonizes the PU-inhibitor binding to cells thus restoring the capacity to block Grp94 and Grp94-IgG complex formation. Results have implications for enhancing the therapeutic efficacy of PU-inhibitors against circulating pathogenic Grp94. Extracellular Grp94 forms pathogenic complexes with IgG. PU-inhibitors block the Grp94-IgG complex formation in absence of cells. PU-inhibitors target cells and activate the purinergic pathway. Effects of PU-inhibitors on cells are reversed by ATP. ATP restores the capacity of PU-inhibitors to block the Grp94-IgG complex formation.
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Affiliation(s)
- Elisa Tramentozzi
- Department of Pharmaceutical and Pharmacological Sciences, University of Padua, Largo E.Meneghetti, 2, 35131, Padua, Italy
| | - Paola Finotti
- Department of Pharmaceutical and Pharmacological Sciences, University of Padua, Largo E.Meneghetti, 2, 35131, Padua, Italy
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Bang OY, Kim EH. Mesenchymal Stem Cell-Derived Extracellular Vesicle Therapy for Stroke: Challenges and Progress. Front Neurol 2019; 10:211. [PMID: 30915025 PMCID: PMC6422999 DOI: 10.3389/fneur.2019.00211] [Citation(s) in RCA: 80] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2018] [Accepted: 02/18/2019] [Indexed: 12/16/2022] Open
Abstract
Stroke is the leading cause of physical disability among adults. Stem cells such as mesenchymal stem cells (MSCs) secrete a variety of bioactive substances, including trophic factors and extracellular vesicles (EVs), into the injured brain, which may be associated with enhanced neurogenesis, angiogenesis, and neuroprotection. EVs are circular membrane fragments (30 nm−1 μm) that are shed from the cell surface and harbor proteins, microRNAs, etc. Since 2013 when it was first reported that intravenous application of MSC-derived EVs in a stroke rat model improved neurological outcomes and increased angiogenesis and neurogenesis, many preclinical studies have shown that stem cell-derived EVs can be used in stroke therapy, as an alternative approach to stem cell infusion. Although scientific research regarding MSC-derived EV therapeutics is still at an early stage, research is rapidly increasing and is demonstrating a promising approach for patients with severe stroke. MSC therapies have already been tested in preclinical studies and clinical trials, and EV-mediated therapy has unique advantages over cell therapies in stroke patients, in terms of biodistribution (overcoming the first pass effect and crossing the blood-brain-barrier), cell-free paradigm (avoidance of cell-related problems such as tumor formation and infarcts caused by vascular occlusion), whilst offering an off-the-shelf approach for acute ischemic stroke. Recently, advances have been made in the understanding of the function and biogenesis of EVs and EVs therapeutics for various diseases. This review presents the most recent advances in MSC-derived EV therapy for stroke, focusing on the application of this strategy for stroke patients.
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Affiliation(s)
- Oh Young Bang
- Department of Neurology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea.,Translational and Stem Cell Research Laboratory on Stroke, Samsung Medical Center, Seoul, South Korea
| | - Eun Hee Kim
- Translational and Stem Cell Research Laboratory on Stroke, Samsung Medical Center, Seoul, South Korea.,Medical Research Institute, Sungkyunkwan University School of Medicine, Seoul, South Korea.,Stem cell and Regenerative Medicine Institute, Samsung Biomedical Research Institute, Seoul, South Korea
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35
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Ishii T, Warabi E, Mann GE. Circadian control of BDNF-mediated Nrf2 activation in astrocytes protects dopaminergic neurons from ferroptosis. Free Radic Biol Med 2019; 133:169-178. [PMID: 30189266 DOI: 10.1016/j.freeradbiomed.2018.09.002] [Citation(s) in RCA: 117] [Impact Index Per Article: 23.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/09/2018] [Revised: 08/20/2018] [Accepted: 09/01/2018] [Indexed: 01/19/2023]
Abstract
Astrocyte-neuron interactions protect neurons from iron-mediated toxicity. As dopamine can be metabolized to reactive quinones, dopaminergic neurons are susceptible to oxidative damage and ferroptosis-like induced cell death. Detoxification enzymes are required to protect neurons. Brain-derived neurotrophic factor (BDNF) plays a key role in the regulation of redox sensitive transcription factor Nrf2 in astrocytes and metabolic cooperation between astrocytes and neurons. This article reviews the importance of BDNF and astrocyte-neuron interactions in the protection of neurons against oxidative damages in rodent brains. We previously proposed that BDNF activates Nrf2 via the truncated TrkB.T1 and p75NTR receptor complex in astrocytes. Stimulation by BDNF generates the signaling molecule ceramide, which activates PKCζ leading to induction of the CK2-Nrf2 signaling axis. As a cell clock regulates p75NTR expression, we suggested that BDNF effectively activates Nrf2 in astrocytes during the rest phase. In contrast, neurons express both TrkB.FL and TrkB.T1, and TrkB.FL tyrosine kinase activity inhibits p75NTR-dependent ceramide generation and internalizes p75NTR. Therefore, BDNF may not effectively activate Nrf2 in neurons. Notably, neurons only weakly activate detoxification and antioxidant enzymes/proteins via the Nrf2-ARE signaling axis. Thus, astrocytes may provide relevant transcripts and/or proteins to neurons via microparticles/exosomes increasing neuronal resistance to oxidative stress. Circadian increases in the levels of circulating glucocorticoids may further facilitate material transfer from astrocytes to neurons via the stimulation of pannexin 1 channels-P2X7R signaling pathway in astrocytes at the beginning of the active phase. Dysregulation of astrocyte-neuron interactions could therefore contribute to the pathogenesis of neurodegenerative diseases including Parkinson's disease.
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Affiliation(s)
- Tetsuro Ishii
- School of Medicine, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan.
| | - Eiji Warabi
- School of Medicine, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - Giovanni E Mann
- School of Cardiovascular Medicine and Sciences, King's British Heart Foundation Centre of Research Excellence, Faculty of Life Sciences and Medicine, King's College London, London SE1 9NH, UK
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36
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Zhang M, Liang W, Gong W, Yoshimura T, Chen K, Wang JM. The Critical Role of the Antimicrobial Peptide LL-37/ CRAMP in Protection of Colon Microbiota Balance, Mucosal Homeostasis, Anti-Inflammatory Responses, and Resistance to Carcinogenesis. Crit Rev Immunol 2019; 39:83-92. [PMID: 31679249 PMCID: PMC11000334 DOI: 10.1615/critrevimmunol.2019030225] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Mouse cathelin-related antimicrobial peptide (CRAMP) and its homologue human cathelicidin (LL-37) play active roles in innate immune responses, angiogenesis, and wound healing. In addition, LL-37/CRAMP fends off microbes and protects against infections in the colon, where the epithelium is exposed to myriad of enteric pathogens. It is increasingly recognized that LL-37/CRAMP maintains colon mucosal barrier integrity, shapes the composition of microbiota, and protects the host from tumorigenesis. In this review, we discuss the importance of LL-37/CRAMP in the homeostasis of the host, with novel findings derived from mice deficient in CRAMP that support the proposition for this natural antimicrobial peptide and an immune modulator as a drug lead for therapeutic development.
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Affiliation(s)
- Meihua Zhang
- Key Laboratory of Birth Regulation and Control Technology of National Health Commission of China, Maternal and Child Health Care Hospital of Shandong Province, Jinan, China
- Cancer and Inflammation Program, Center for Cancer Research, National Cancer Institute, Frederick, Maryland
| | - Weiwei Liang
- Cancer and Inflammation Program, Center for Cancer Research, National Cancer Institute, Frederick, Maryland
- Department of Immunology, School of Basic Medical Sciences and Key Laboratory of Medical Immunology of Ministry of Health, Peking University, Health Science Center, Beijing, China
| | - Wanghua Gong
- Basic Research Program, Leidos Biomedical Research, Inc., Frederick, Maryland
| | - Teizo Yoshimura
- Department of Pathology and Experimental Medicine, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama, Japan
| | - Keqiang Chen
- Cancer and Inflammation Program, Center for Cancer Research, National Cancer Institute, Frederick, Maryland
| | - Ji Ming Wang
- Cancer and Inflammation Program, Center for Cancer Research, National Cancer Institute, Frederick, Maryland
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37
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Mantione ME, Lombardi M, Baccellieri D, Ferrara D, Castellano R, Chiesa R, Alfieri O, Foglieni C. IL-1β/MMP9 activation in primary human vascular smooth muscle-like cells: Exploring the role of TNFα and P2X7. Int J Cardiol 2018; 278:202-209. [PMID: 30583923 DOI: 10.1016/j.ijcard.2018.12.047] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Accepted: 12/17/2018] [Indexed: 12/16/2022]
Abstract
BACKGROUND Vascular smooth muscle cells exhibit phenotypic plasticity in response to microenvironmental stimuli and contribute to vascular remodelling through mechanisms only partially understood. In atherosclerosis, P2X-purinoceptor7 (P2X7) has been related to interleukin-1β (IL-1β) and metalloproteinase 9 (MMP9). The hypoxia-inducible factor-1alpha (HIF1α) was associated to remodelling. Here the activation of IL-1β and MMP9 was studied in relationship to P2X7 and HIF1α in cells exploited from human carotid plaque and internal mammary artery. METHODS AND RESULTS Migrating cells expressed HIF1α-regulated canopy FGF-signalling regulator 2 and CD117, and led to primary cells with SMC-like phenotype (VSMC), P2X7+. We investigated in VSMC the effects of hypoxia, of treatment with tumour necrosis factor-α (TNFα) and/or with P2X7 antagonist, A740003. Quantitative RT-PCR showed that hypoxia unaffected IL-1β and down-regulated MMP9 mRNAs, without activating HIF1α. TNFα increased IL-1β mRNA via NLR Family Pyrin Domain-Containing 3, with production of proIL-1β but no rise of mature IL-1β. Zymography demonstrated that A740003 triggered MMP9 secretion from VSMC. Combination of A740003 with TNFα abrogated this effect. Combination was ineffective on IL-1β activation elicited by TNFα, but down-regulated HIF1α mRNA. A740003 induced the intracellular P2X7 aggregation and differently perturbed lysosome and mitochondria network compared to TNFα. CONCLUSIONS Cells migration from human arteries leads to partially differentiated VSMC analogous to neointimal cells within atherosclerotic lesions. Down-regulated HIF1α in stimulated VSMC translates in resilience in atherosclerotic lesions. P2X7-independent partial activation of IL-1β elicited by TNFα underlines complexity of the cytokine secretion. Data also supported P2X7 as modulator of MMP9 secretion, important for atherosclerosis progression.
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Affiliation(s)
- Maria Elena Mantione
- Cardiovascular Research Area, IRCCS San Raffaele Scientific Institute, Milano, Italy
| | - Maria Lombardi
- Cardiovascular Research Area, IRCCS San Raffaele Scientific Institute, Milano, Italy
| | - Domenico Baccellieri
- Cardio-thoracic-vascular Department, IRCCS San Raffaele Scientific Institute, Milano, Italy
| | - David Ferrara
- Cardio-thoracic-vascular Department, IRCCS San Raffaele Scientific Institute, Milano, Italy
| | - Renata Castellano
- Cardio-thoracic-vascular Department, IRCCS San Raffaele Scientific Institute, Milano, Italy
| | - Roberto Chiesa
- Cardio-thoracic-vascular Department, IRCCS San Raffaele Scientific Institute, Milano, Italy
| | - Ottavio Alfieri
- Cardio-thoracic-vascular Department, IRCCS San Raffaele Scientific Institute, Milano, Italy
| | - Chiara Foglieni
- Cardiovascular Research Area, IRCCS San Raffaele Scientific Institute, Milano, Italy.
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38
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Phan J, Kumar P, Hao D, Gao K, Farmer D, Wang A. Engineering mesenchymal stem cells to improve their exosome efficacy and yield for cell-free therapy. J Extracell Vesicles 2018; 7:1522236. [PMID: 30275938 PMCID: PMC6161586 DOI: 10.1080/20013078.2018.1522236] [Citation(s) in RCA: 193] [Impact Index Per Article: 32.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2017] [Revised: 08/08/2018] [Accepted: 08/27/2018] [Indexed: 02/07/2023] Open
Abstract
Through traditional medicine, there were diseases and disorders that previously remained untreated or were simply thought to be incurable. Since the discovery of mesenchymal stem cells (MSCs), there has been a flurry of research to develop MSC-based therapy for diseases and disorders. It is now well-known that MSCs do not typically engraft after transplantation and exhibit their therapeutic effect via a paracrine mechanism. In addition to secretory proteins, MSCs also produce extracellular vesicles (EVs), membrane-bound nanovesicles containing proteins, DNA and RNA. The secreted vesicles then interact with target cells and deliver their contents, imparting their ultimate therapeutic effect. Unlike the widely studied cancer cells, the yield of MSC-exosomes is a limiting factor for large-scale production for cell-free therapies. Here we summarise potential approaches to increase the yield of such vesicles while maintaining or enhancing their efficacy by engineering the extracellular environment and intracellular components of MSCs.
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Affiliation(s)
- Jennifer Phan
- Surgical Bioengineering Laboratory, Department of Surgery, University of California, Davis School of Medicine, Sacramento, CA, USA.,CIRM Bridges to Stem Cell Research Program, California State University, Sacramento, CA, USA
| | - Priyadarsini Kumar
- Surgical Bioengineering Laboratory, Department of Surgery, University of California, Davis School of Medicine, Sacramento, CA, USA.,Institute for Paediatric Regenerative Medicine, Shriners Hospital for Children/UC Davis School of Medicine, Sacramento, CA, USA
| | - Dake Hao
- Surgical Bioengineering Laboratory, Department of Surgery, University of California, Davis School of Medicine, Sacramento, CA, USA.,Institute for Paediatric Regenerative Medicine, Shriners Hospital for Children/UC Davis School of Medicine, Sacramento, CA, USA
| | - Kewa Gao
- Surgical Bioengineering Laboratory, Department of Surgery, University of California, Davis School of Medicine, Sacramento, CA, USA.,Department of Burn and Plastic Surgery, The Third Xiangya Hospital of Central South University, Changsha, Hunan, P.R. China
| | - Diana Farmer
- Surgical Bioengineering Laboratory, Department of Surgery, University of California, Davis School of Medicine, Sacramento, CA, USA.,Institute for Paediatric Regenerative Medicine, Shriners Hospital for Children/UC Davis School of Medicine, Sacramento, CA, USA
| | - Aijun Wang
- Surgical Bioengineering Laboratory, Department of Surgery, University of California, Davis School of Medicine, Sacramento, CA, USA.,Institute for Paediatric Regenerative Medicine, Shriners Hospital for Children/UC Davis School of Medicine, Sacramento, CA, USA
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Yang R, Yu T, Kou X, Gao X, Chen C, Liu D, Zhou Y, Shi S. Tet1 and Tet2 maintain mesenchymal stem cell homeostasis via demethylation of the P2rX7 promoter. Nat Commun 2018; 9:2143. [PMID: 29858571 PMCID: PMC5984622 DOI: 10.1038/s41467-018-04464-6] [Citation(s) in RCA: 78] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2017] [Accepted: 05/02/2018] [Indexed: 12/13/2022] Open
Abstract
Ten-eleven translocation (Tet) family-mediated DNA oxidation represents an epigenetic modification capable of converting 5-methylcytosine (5-mC) to 5-hydroxymethylcytosine (5-hmC), which regulates various biological processes. However, it is unknown whether Tet family affects mesenchymal stem cells (MSCs) or the skeletal system. Here we show that depletion of Tet1 and Tet2 results in impaired self-renewal and differentiation of bone marrow MSCs (BMMSCs) and a significant osteopenia phenotype. Tet1 and Tet2 deficiency reduces demethylation of the P2rX7 promoter and downregulates exosome release, leading to intracellular accumulation of miR-297a-5p, miR-297b-5p, and miR-297c-5p. These miRNAs inhibit Runx2 signaling to impair BMMSC function. We show that overexpression of P2rX7 rescues the impaired BMMSCs and osteoporotic phenotype in Tet1 and Tet2 double knockout mice. These results indicate that Tet1 and Tet2 play a critical role in maintaining BMMSC and bone homeostasis through demethylation of P2rX7 to control exosome and miRNA release. This Tet/P2rX7/Runx2 cascade may serve as a target for the development of novel therapies for osteopenia disorders. Tet-mediated DNA oxidation converts 5-methylcytosine (5-mC) to 5-hydroxymethylcytosine (5-hmC), which is essential to regulate different biological processes. Here the authors show that Tet1 and Tet2 regulate mesenchymal stem cell and bone homeostasis through demethylation of P2rX7 promoter.
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Affiliation(s)
- Ruili Yang
- Department of Orthodontics, Peking University School & Hospital of Stomatology, #22 Zhongguancun South Avenue, Beijing, 100081, China.,Department of Anatomy and Cell Biology, University of Pennsylvania, School of Dental Medicine, Philadelphia, PA, 19104, USA.,Sino-US joint Research Center of Oral Tissue-derived Stem Cells, PKU Industrial Park, Building 10 First Floor, Beiqing Road, Changping District, Beijing, 102200, China
| | - Tingting Yu
- Department of Orthodontics, Peking University School & Hospital of Stomatology, #22 Zhongguancun South Avenue, Beijing, 100081, China.,Department of Anatomy and Cell Biology, University of Pennsylvania, School of Dental Medicine, Philadelphia, PA, 19104, USA
| | - Xiaoxing Kou
- Department of Orthodontics, Peking University School & Hospital of Stomatology, #22 Zhongguancun South Avenue, Beijing, 100081, China.,Department of Anatomy and Cell Biology, University of Pennsylvania, School of Dental Medicine, Philadelphia, PA, 19104, USA
| | - Xiang Gao
- Department of Anatomy and Cell Biology, University of Pennsylvania, School of Dental Medicine, Philadelphia, PA, 19104, USA.,College of Stomatology and Chongqing Key Laboratory of Oral Diseases and Biomedical Sciences, Chongqing Medical University, Chongqing, 401147, China
| | - Chider Chen
- Department of Anatomy and Cell Biology, University of Pennsylvania, School of Dental Medicine, Philadelphia, PA, 19104, USA
| | - Dawei Liu
- Department of Orthodontics, Peking University School & Hospital of Stomatology, #22 Zhongguancun South Avenue, Beijing, 100081, China.,Department of Anatomy and Cell Biology, University of Pennsylvania, School of Dental Medicine, Philadelphia, PA, 19104, USA
| | - Yanheng Zhou
- Department of Orthodontics, Peking University School & Hospital of Stomatology, #22 Zhongguancun South Avenue, Beijing, 100081, China. .,Sino-US joint Research Center of Oral Tissue-derived Stem Cells, PKU Industrial Park, Building 10 First Floor, Beiqing Road, Changping District, Beijing, 102200, China.
| | - Songtao Shi
- Department of Anatomy and Cell Biology, University of Pennsylvania, School of Dental Medicine, Philadelphia, PA, 19104, USA. .,Sino-US joint Research Center of Oral Tissue-derived Stem Cells, PKU Industrial Park, Building 10 First Floor, Beiqing Road, Changping District, Beijing, 102200, China.
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Abstract
All eukaryotic cells secrete a range of proteins in a constitutive or regulated manner through the conventional or canonical exocytic/secretory pathway characterized by vesicular traffic from the endoplasmic reticulum, through the Golgi apparatus, and towards the plasma membrane. However, a number of proteins are secreted in an unconventional manner, which are insensitive to inhibitors of conventional exocytosis and use a route that bypasses the Golgi apparatus. These include cytosolic proteins such as fibroblast growth factor 2 (FGF2) and interleukin-1β (IL-1β), and membrane proteins that are known to also traverse to the plasma membrane by a conventional process of exocytosis, such as α integrin and the cystic fibrosis transmembrane conductor (CFTR). Mechanisms underlying unconventional protein secretion (UPS) are actively being analyzed and deciphered, and these range from an unusual form of plasma membrane translocation to vesicular processes involving the generation of exosomes and other extracellular microvesicles. In this chapter, we provide an overview on what is currently known about UPS in animal cells.
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Affiliation(s)
- Fanny Ng
- Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, 8 Medical Drive, Singapore, 117597, Singapore
| | - Bor Luen Tang
- Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, 8 Medical Drive, Singapore, 117597, Singapore.
- NUS Graduate School for Integrative Sciences and Engineering, National University of Singapore, 28 Medical Drive, Singapore, 117456, Singapore.
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41
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The role of cold‐inducibleRNAbinding protein in cell stress response. Int J Cancer 2017; 141:2164-2173. [DOI: 10.1002/ijc.30833] [Citation(s) in RCA: 67] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2016] [Accepted: 06/01/2017] [Indexed: 12/24/2022]
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42
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Bellezza I, Minelli A. Adenosine in sperm physiology. Mol Aspects Med 2017; 55:102-109. [DOI: 10.1016/j.mam.2016.11.009] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2016] [Revised: 11/23/2016] [Accepted: 11/23/2016] [Indexed: 10/20/2022]
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43
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Rezaie J, Ajezi S, Avci ÇB, Karimipour M, Geranmayeh MH, Nourazarian A, Sokullu E, Rezabakhsh A, Rahbarghazi R. Exosomes and their Application in Biomedical Field: Difficulties and Advantages. Mol Neurobiol 2017; 55:3372-3393. [DOI: 10.1007/s12035-017-0582-7] [Citation(s) in RCA: 53] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2017] [Accepted: 04/27/2017] [Indexed: 12/31/2022]
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44
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Cui X, Wan B, Guo LH, Yang Y, Ren X. Insight into the Mechanisms of Combined Toxicity of Single-Walled Carbon Nanotubes and Nickel Ions in Macrophages: Role of P2X 7 Receptor. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2016; 50:12473-12483. [PMID: 27750000 DOI: 10.1021/acs.est.6b03842] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Coexistence of nanomaterials and environmental pollutants requires in-depth understanding of combined toxicity and underlying mechanism. In this work, we found that coexposure to the mixture of noncytotoxic level of single-walled carbon nanotubes (SWCNTs) (10 μg/mL) and Ni2+ (20 μM) induced significant cytotoxicity in macrophages. However, almost equal amount of intracellular Ni2+ was detected after Ni2+/SWCNT coexposure or Ni2+ single exposure, indicating no enhanced cellular uptake of Ni2+ occurred. SDS-PAGE analysis revealed 50% more SWCNTs retained in Ni2+/SWCNT exposed cells than that with SWCNT exposure alone, regardless of the exposure sequence (coexposure, Ni2+ pre- or post-treatment), suggesting inhibited SWCNT exocytosis by Ni2+. The increased cellular dose of SWCNTs could quantitatively account for the elevated toxicity of Ni2+/SWCNT mixture to cells. It was then found that agonist (ATP) and antagonist (o-ATP) of P2X7R could regulate intracellular SWCNT amount and the cytotoxicity accordingly. In addition, inhibition of P2X7R by P2X7-targeting siRNA diminished the inhibitory effect of Ni2+. It was therefore concluded that Ni2+ impeded SWCNT exocytosis by inhibiting P2X7R, leading to higher intracellular retention of SWCNTs and elevated cytotoxicity. Our work identified exocytosis inhibition as an important mechanism for SWCNT/Ni2+ toxicity, and revealed the crucial role of P2X7R in mediating such inhibitory effect.
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Affiliation(s)
- Xuejing Cui
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences , Beijing 100085, China
- University of Chinese Academy of Sciences , Beijing 100049, China
| | - Bin Wan
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences , Beijing 100085, China
- University of Chinese Academy of Sciences , Beijing 100049, China
| | - Liang-Hong Guo
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences , Beijing 100085, China
- University of Chinese Academy of Sciences , Beijing 100049, China
- Institute of Environment and Health, Jianghan University , Wuhan, Hubei 430056, China
| | - Yu Yang
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences , Beijing 100085, China
| | - Xiaomin Ren
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences , Beijing 100085, China
- University of Chinese Academy of Sciences , Beijing 100049, China
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45
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Välimäki E, Cypryk W, Virkanen J, Nurmi K, Turunen PM, Eklund KK, Åkerman KE, Nyman TA, Matikainen S. Calpain Activity Is Essential for ATP-Driven Unconventional Vesicle-Mediated Protein Secretion and Inflammasome Activation in Human Macrophages. THE JOURNAL OF IMMUNOLOGY 2016; 197:3315-3325. [PMID: 27638862 DOI: 10.4049/jimmunol.1501840] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Received: 08/20/2015] [Accepted: 08/21/2016] [Indexed: 12/22/2022]
Abstract
Extracellular ATP is an endogenous danger signal that is known to activate inflammatory responses in innate immune cells, including macrophages. Activated macrophages start to secrete proteins to induce an immune response, as well as to recruit other immune cells to the site of infection and tissue damage. In this study, we characterized the secretome (i.e., the global pattern of secreted proteins) of ATP-stimulated human macrophages. We show that ATP stimulation activates robust vesicle-mediated unconventional protein secretion, including exosome release and membrane shedding, from human macrophages. Pathway analysis of the identified secreted proteins showed that calpain-related pathways were overrepresented in the secretome of ATP-stimulated cells. In accordance with this, calpains, which are calcium-dependent nonlysosomal cysteine proteases, were activated upon ATP stimulation through a P2X purinoceptor 7 receptor-dependent pathway. Functional studies demonstrated that calpain activity is essential for the P2X purinoceptor 7 receptor-mediated activation of unconventional protein secretion. Unconventional protein secretion was followed by cell necrosis and NLRP3 inflammasome-mediated secretion of the mature form of the proinflammatory cytokine IL-1β. Furthermore, ATP-driven NLRP3 inflammasome activation was also dependent on calpain activity. Interestingly, pro-IL-1β and inflammasome components ASC and caspase-1 were released by ATP-activated macrophages through a vesicle-mediated secretion pathway. In conclusion, to our knowledge, we provide the first global characterization of proteins secreted by ATP-activated human macrophages and show a pivotal role for calpains in the activation of the inflammatory response during ATP exposure.
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Affiliation(s)
- Elina Välimäki
- Institute of Biotechnology, University of Helsinki, 00014 Helsinki, Finland.,Finnish Institute of Occupational Health, 00250 Helsinki, Finland
| | - Wojciech Cypryk
- Institute of Biotechnology, University of Helsinki, 00014 Helsinki, Finland
| | - Juhani Virkanen
- Department of Geosciences and Geography, University of Helsinki, 00014 Helsinki, Finland
| | - Katariina Nurmi
- Division of Rheumatology, Helsinki University Hospital, Helsinki University, 00015 Helsinki, Finland; and
| | - Pauli M Turunen
- Department of Physiology, Institute of Biomedicine, Biomedicum Helsinki, University of Helsinki, 00014 Helsinki, Finland
| | - Kari K Eklund
- Division of Rheumatology, Helsinki University Hospital, Helsinki University, 00015 Helsinki, Finland; and
| | - Karl E Åkerman
- Department of Physiology, Institute of Biomedicine, Biomedicum Helsinki, University of Helsinki, 00014 Helsinki, Finland
| | - Tuula A Nyman
- Institute of Biotechnology, University of Helsinki, 00014 Helsinki, Finland
| | - Sampsa Matikainen
- Finnish Institute of Occupational Health, 00250 Helsinki, Finland; .,Division of Rheumatology, Helsinki University Hospital, Helsinki University, 00015 Helsinki, Finland; and
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46
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Chandrashekaran V, Das S, Seth RK, Dattaroy D, Alhasson F, Michelotti G, Nagarkatti M, Nagarkatti P, Diehl AM, Chatterjee S. Purinergic receptor X7 mediates leptin induced GLUT4 function in stellate cells in nonalcoholic steatohepatitis. BIOCHIMICA ET BIOPHYSICA ACTA 2016; 1862:32-45. [PMID: 26474534 PMCID: PMC4988689 DOI: 10.1016/j.bbadis.2015.10.009] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2015] [Revised: 10/09/2015] [Accepted: 10/12/2015] [Indexed: 12/19/2022]
Abstract
Metabolic oxidative stress via CYP2E1 can act as a second hit in NASH progression. Our previous studies have shown that oxidative stress in NASH causes higher leptin levels and induces purinergic receptor X7 (P2X7r). We tested the hypothesis that higher circulating leptin due to CYP2E1-mediated oxidative stress induces P2X7r. P2X7r in turn activates stellate cells and causes increased proliferation via modulating Glut4, the glucose transporter, and increased intracellular glucose. Using a high fat diet-fed NAFLD model where bromodichloromethane (BDCM) was administered to induce CYP2E1-mediated oxidative stress, we show that P2X7r expression and protein levels were leptin and CYP2E1 dependent. P2X7r KO mice had significantly decreased stellate cell proliferation. Human NASH livers showed marked increase in P2X7r, and Glut4 in α-SMA positive cells. NASH livers had significant increase in Glut4 protein and phosphorylated AKT, needed for Glut4 translocation while leptin KO and P2X7r KO mice showed marked decrease in Glut4 levels primarily in stellate cells. Mechanistically stellate cells showed increase in phosphorylated AKT, Glut4 protein and localization in the membrane following administration of P2X7r agonist or leptin+P2X7r agonist, while use of P2X7r antagonist or AKT inhibitor attenuated the response suggesting that leptin-P2X7r axis in concert but not leptin alone is responsible for the Glut4 induction and translocation. Finally P2X7r-agonist and leptin caused an increase in intracellular glucose and consumption by increasing the activity of hexokinase. In conclusion, the study shows a novel role of leptin-induced P2X7r in modulating Glut4 induction and translocation in hepatic stellate cells, that are key to NASH progression.
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Affiliation(s)
- Varun Chandrashekaran
- Environmental Health and Disease Laboratory, Department of Environmental Health Sciences, Arnold School of Public Health, University of South Carolina, Columbia, SC 29208, USA
| | - Suvarthi Das
- Environmental Health and Disease Laboratory, Department of Environmental Health Sciences, Arnold School of Public Health, University of South Carolina, Columbia, SC 29208, USA
| | - Ratanesh Kumar Seth
- Environmental Health and Disease Laboratory, Department of Environmental Health Sciences, Arnold School of Public Health, University of South Carolina, Columbia, SC 29208, USA
| | - Diptadip Dattaroy
- Environmental Health and Disease Laboratory, Department of Environmental Health Sciences, Arnold School of Public Health, University of South Carolina, Columbia, SC 29208, USA
| | - Firas Alhasson
- Environmental Health and Disease Laboratory, Department of Environmental Health Sciences, Arnold School of Public Health, University of South Carolina, Columbia, SC 29208, USA
| | | | - Mitzi Nagarkatti
- Department of Pathology, Microbiology and Immunology, University of South Carolina School of Medicine, Columbia, SC 29208, USA
| | - Prakash Nagarkatti
- Department of Pathology, Microbiology and Immunology, University of South Carolina School of Medicine, Columbia, SC 29208, USA
| | - Anna Mae Diehl
- Division of Gastroenterology, Duke University, Durham, NC 27707, USA
| | - Saurabh Chatterjee
- Environmental Health and Disease Laboratory, Department of Environmental Health Sciences, Arnold School of Public Health, University of South Carolina, Columbia, SC 29208, USA.
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47
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Torres-Fuentes JL, Rios M, Moreno RD. Involvement of a P2X7 Receptor in the Acrosome Reaction Induced by ATP in Rat Spermatozoa. J Cell Physiol 2015; 230:3068-75. [PMID: 25989529 DOI: 10.1002/jcp.25044] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2014] [Accepted: 05/11/2015] [Indexed: 02/06/2023]
Abstract
The acrosome reaction (AR) is the exocytosis of the acrosomal vesicle in response to different physiological and non-physiological stimuli. Particularly in mammals, the AR is needed for sperm to fuse with the oocyte plasma membrane, and it occurs only in capacitated sperm. Previous evidence in the literature indicates that extracellular ATP induces the AR in capacitated human and bovine spermatozoa, but its receptor has not yet been identified. The aim of this work was to define a putative ATP receptor in rat spermatozoa using pharmacological and biochemical approaches. We found that ATP induced the AR only in capacitated rat spermatozoa, which was inhibited in the presence of two general inhibitors of ATP receptors (P2 receptors), Suramin, and oxidized ATP (oATP), and one inhibitor of P2X receptor (pyridoxalphosphate-6-azophenyl-2',4'-disulfonic acid [PPADS]). In addition, the AR induced by ATP in capacitated rat spermatozoa was inhibited by brilliant blue-G (BB-G) and 17-β-oestradiol, two blockers of P2X7 receptors. Moreover, the ATP analog 2'(3')-O-(4-benzoylbenzoyl) ATP (BzATP) was almost 500 times more potent than ATP to induce the AR, which agrees with the pharmacology of a P2X7 receptor. Here, we show the presence of P2X7 receptor by Western blot and its localization in the tail and acrosome by indirect immunofluorescence. Finally, we quantify the presence of ATP in the rat oviduct during the estrous cycle. We found that the ATP concentration within the lumen of the oviduct is similar to those required to induce acrosome reaction, which agree with its role during in vivo fertilization. Therefore, our results strongly suggest that ATP induces the AR in capacitated rat spermatozoa through a P2X7 receptor, which may be functional during in vivo fertilization.
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Affiliation(s)
- Jorge L Torres-Fuentes
- Departamento de Fisiología, Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Mariana Rios
- Departamento de Fisiología, Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Ricardo D Moreno
- Departamento de Fisiología, Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, Santiago, Chile
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48
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Lioi AB, Ferrari BM, Dubyak GR, Weinberg A, Sieg SF. Human β Defensin-3 Increases CD86 Expression on Monocytes by Activating the ATP-Gated Channel P2X7. THE JOURNAL OF IMMUNOLOGY 2015; 195:4438-45. [PMID: 26416278 DOI: 10.4049/jimmunol.1401319] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Received: 05/21/2014] [Accepted: 08/19/2015] [Indexed: 11/19/2022]
Abstract
Human β defensin-3 (hBD-3), an epithelial cell-derived antimicrobial peptide, mediates chemotaxis and activation of myeloid cells. In this study, we provide evidence that hBD-3 induces the costimulatory molecule CD86 on primary human monocytes by a mechanism involving autocrine activation of ionotropic P2X7 receptors (P2X7R) by ATP. Incubation of monocytes with hBD-3 resulted in increased expression of both the CD80 and CD86 costimulatory molecules. Treatment of monocytes with a selective P2X7R antagonist inhibited the ability of hBD-3 to induce expression of CD86 but not CD80. The hBD-3-dependent upregulation of CD86 was also attenuated in monocytes incubated with apyrase, a potent scavenger of extracellular ATP. Finally, direct activation of monocyte P2X7R by exogenous ATP mimicked the ability of hBD-3 to induce CD86 expression. These data suggest that hBD-3 induces monocyte activation by both P2X7-dependent (CD86 upregulation) and P2X7-independent (CD80 upregulation) signaling mechanisms and raise the possibility that activation of P2X7R could play an important role in shaping the inflammatory microenvironment in conditions where hBD-3 is highly expressed, such as psoriasis or oral carcinoma.
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Affiliation(s)
- Anthony B Lioi
- Department of Molecular Biology and Microbiology, Case Western Reserve University, Cleveland, OH 44106
| | - Brian M Ferrari
- Division of Infectious Diseases, Department of Medicine, Center for AIDS Research, Case Western Reserve University, Cleveland, OH 44106
| | - George R Dubyak
- Department of Physiology and Biophysics, Case Western Reserve University, Cleveland, OH 44106; and
| | - Aaron Weinberg
- Department of Biological Sciences, School of Dental Medicine, Case Western Reserve University, Cleveland, OH 44106
| | - Scott F Sieg
- Division of Infectious Diseases, Department of Medicine, Center for AIDS Research, Case Western Reserve University, Cleveland, OH 44106;
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49
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de Souza PS, Faccion RS, Bernardo PS, Maia RC. Membrane microparticles: shedding new light into cancer cell communication. J Cancer Res Clin Oncol 2015; 142:1395-406. [PMID: 26285684 DOI: 10.1007/s00432-015-2029-8] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2015] [Accepted: 08/05/2015] [Indexed: 12/11/2022]
Abstract
BACKGROUND Microparticles (MPs) or ectosomes are small enclosed fragments (from 0.2 to 2 μm in diameter) released from the cellular plasma membrane. Several oncogenic molecules have been identified inside MPs, including soluble proteins XIAP, survivin, metalloproteinases, CX3CL1, PYK2 and other microRNA-related proteins; membrane proteins EGFR, HER-2, integrins and efflux pumps; and messenger RNAs and microRNAs miR-21, miR-27a, let-7, miR-451, among others. Studies have shown that MPs transfer their cargo to neoplastic or non-malignant cells and thus contribute to activation of oncogenic pathways, resulting in cell survival, drug resistance and cancer dissemination. DISCUSSION AND CONCLUSION This review summarizes recent findings on MP biogenesis and the role of the MPs cargo in cancer and discusses some of the RNAs and proteins involved. In addition, the discussion covers evidence of (1) how and which signaling pathways can be activated by MPs in recipient cells; (2) recipient cell-type selectivity in incorporation of proteins and RNAs transported by MPs; and (3) how upon stimulation, stromal cells release MPs, promoting resistance to chemotherapeutics and invasiveness in cancer cells.
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Affiliation(s)
- Paloma Silva de Souza
- Laboratório de Hemato-Oncologia Celular e Molecular, Programa de Hemato-Oncologia Molecular, Brazilian National Cancer Institute (INCA), Rio de Janeiro, Brazil
| | - Roberta Soares Faccion
- Laboratório de Hemato-Oncologia Celular e Molecular, Programa de Hemato-Oncologia Molecular, Brazilian National Cancer Institute (INCA), Rio de Janeiro, Brazil
| | | | - Raquel Ciuvalschi Maia
- Laboratório de Hemato-Oncologia Celular e Molecular, Programa de Hemato-Oncologia Molecular, Brazilian National Cancer Institute (INCA), Rio de Janeiro, Brazil.
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50
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Menzel S, Rissiek B, Bannas P, Jakoby T, Miksiewicz M, Schwarz N, Nissen M, Haag F, Tholey A, Koch-Nolte F. Nucleotide-Induced Membrane-Proximal Proteolysis Controls the Substrate Specificity of T Cell Ecto-ADP-Ribosyltransferase ARTC2.2. THE JOURNAL OF IMMUNOLOGY 2015. [PMID: 26209623 DOI: 10.4049/jimmunol.1401677] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
ARTC2.2 is a toxin-related, GPI-anchored ADP-ribosyltransferase expressed by murine T cells. In response to NAD(+) released from damaged cells during inflammation, ARTC2.2 ADP-ribosylates and thereby gates the P2X7 ion channel. This induces ectodomain shedding of metalloprotease-sensitive cell surface proteins. In this study, we show that ARTC2.2 itself is a target for P2X7-triggered ectodomain shedding. We identify the metalloprotease cleavage site 3 aa upstream of the predicted GPI anchor attachment site of ARTC2.2. Intravenous injection of NAD(+) increased the level of enzymatically active ARTC2.2 in serum, indicating that this mechanism is operative also under inflammatory conditions in vivo. Radio-ADP-ribosylation assays reveal that shedding refocuses the target specificity of ARTC2.2 from membrane proteins to secretory proteins. Our results uncover nucleotide-induced membrane-proximal proteolysis as a regulatory mechanism to control the substrate specificity of ARTC2.2.
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Affiliation(s)
- Stephan Menzel
- Institute of Immunology, University Medical Center Hamburg-Eppendorf, D20246 Hamburg, Germany
| | - Björn Rissiek
- Institute of Immunology, University Medical Center Hamburg-Eppendorf, D20246 Hamburg, Germany; Department of Neurology, University Medical Center Hamburg-Eppendorf, D20246 Hamburg, Germany
| | - Peter Bannas
- Institute of Immunology, University Medical Center Hamburg-Eppendorf, D20246 Hamburg, Germany; Department of Diagnostic Radiology, University Medical Center Hamburg-Eppendorf, D20246 Hamburg, Germany; and
| | - Thomas Jakoby
- Institute of Experimental Medicine, Systematic Proteome Research Group, Christian-Albrechts-Universität, D24105 Kiel, Germany
| | - Maria Miksiewicz
- Institute of Immunology, University Medical Center Hamburg-Eppendorf, D20246 Hamburg, Germany
| | - Nicole Schwarz
- Institute of Immunology, University Medical Center Hamburg-Eppendorf, D20246 Hamburg, Germany
| | - Marion Nissen
- Institute of Immunology, University Medical Center Hamburg-Eppendorf, D20246 Hamburg, Germany
| | - Friedrich Haag
- Institute of Immunology, University Medical Center Hamburg-Eppendorf, D20246 Hamburg, Germany
| | - Andreas Tholey
- Institute of Experimental Medicine, Systematic Proteome Research Group, Christian-Albrechts-Universität, D24105 Kiel, Germany
| | - Friedrich Koch-Nolte
- Institute of Immunology, University Medical Center Hamburg-Eppendorf, D20246 Hamburg, Germany;
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