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Chen X, Su C, Wei Q, Sun H, Xie J, Nong G. Exosomes Derived from Human Umbilical Cord Mesenchymal Stem Cells Alleviate Diffuse Alveolar Hemorrhage Associated with Systemic Lupus Erythematosus in Mice by Promoting M2 Macrophage Polarization via the microRNA-146a-5p/NOTCH1 Axis. Immunol Invest 2022; 51:1975-1993. [PMID: 35723582 DOI: 10.1080/08820139.2022.2090261] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Systemic lupus erythematosus (SLE)-associated diffuse alveolar hemorrhage (DAH) is a rare but extremely harmful condition. The current study sought to dissect the mechanisms underlying the effects of human umbilical cord mesenchymal stem cell (HUCMSC)-derived exosomes on M2 macrophage polarization in SLE-associated DAH via the microRNA (miR)-146a-5p/NOTCH1 axis. A DAH mouse model was established using pristane. Exosomes were isolated from HUCMSCs transfected or untransfected with the miR-146a-5p antagonist or agonist and their NCs and then injected into DAH mice. Additionally, miR-146a-5p was overexpressed in macrophages. Expression of miR-146a-5p, NOTCH1, M1 macrophage markers, and M2 macrophage markers was measured in mice and macrophages, and inflammatory factor levels were detected. Mouse lung injuries were evaluated, so was the binding of miR-146a-5p to NOTCH1. Rescue experiments were conducted in mice and macrophages using NOTCH1 shRNA and pcDNA3.1-NOTCH1, respectively. NOTCH1 expression was enhanced in DAH mice. HUCMSC-derived exosomes reduced NOTCH1 expression, bleeding, inflammation, and M1 macrophage polarization but elevated M2 macrophage polarization in lung tissues of DAH mice. Mechanistically, NOTCH1 is negatively targeted by miR-146a-5p. miR-146a-5p overexpression diminished M1 marker and inflammatory factor levels but enhanced M2 marker levels in macrophages, which was nullified by NOTCH1 overexpression. HUCMSC-derived exosomes with miR-146a-5p inhibition increased NOTCH1 expression, worsened bleeding and inflammation, and augmented M1 macrophage polarization while decreasing M2 macrophage polarization in lung tissues of DAH mice, which was abrogated by silencing NOTCH1. HUCMSC-derived exosomes diminished NOTCH1 expression to accelerate M2 macrophage polarization via delivery of miR-146a-5p, thus alleviating SLE-associated DAH in mice.
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Affiliation(s)
| | | | - Qing Wei
- Department of Pediatrics, First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, P. R. China
| | - Hongmei Sun
- Department of Pediatrics, First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, P. R. China
| | - Jun Xie
- Department of Pediatrics, First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, P. R. China
| | - Guangmin Nong
- Department of Pediatrics, First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, P. R. China
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2
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Ahamada MM, Jia Y, Wu X. Macrophage Polarization and Plasticity in Systemic Lupus Erythematosus. Front Immunol 2022; 12:734008. [PMID: 34987500 PMCID: PMC8721097 DOI: 10.3389/fimmu.2021.734008] [Citation(s) in RCA: 26] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Accepted: 11/08/2021] [Indexed: 12/14/2022] Open
Abstract
Systemic lupus erythematosus (SLE) is an autoimmune disease that attacks almost every organ. The condition mostly happens to adults but is also found in children, and the latter have the most severe manifestations. Among adults, females, especially non-Caucasian, are mostly affected. Even if the etiology of SLE remains unclear, studies show a close relation between this disease and both genetics and environment. Despite the large number of published articles about SLE, we still do not have a clear picture of its pathogenesis, and no specific drug has been found to treat this condition effectively. The implication of macrophages in SLE development is gaining ground, and studying it could answer these gaps. Indeed, both in vivo and in vitro studies increasingly report a strong link between this disease and macrophages. Hence, this review aims to explore the role of macrophages polarization and plasticity in SLE development. Understanding this role is of paramount importance because in-depth knowledge of the connection between macrophages and this systemic disease could clarify its pathogenesis and provide a foundation for macrophage-centered therapeutic approaches.
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Affiliation(s)
- Mariame Mohamed Ahamada
- Department of Pediatrics, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Yang Jia
- Department of Pediatrics, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Xiaochuan Wu
- Department of Pediatrics, The Second Xiangya Hospital, Central South University, Changsha, China
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Christopoulos PF, Gjølberg TT, Krüger S, Haraldsen G, Andersen JT, Sundlisæter E. Targeting the Notch Signaling Pathway in Chronic Inflammatory Diseases. Front Immunol 2021; 12:668207. [PMID: 33912195 PMCID: PMC8071949 DOI: 10.3389/fimmu.2021.668207] [Citation(s) in RCA: 55] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2021] [Accepted: 03/24/2021] [Indexed: 12/14/2022] Open
Abstract
The Notch signaling pathway regulates developmental cell-fate decisions and has recently also been linked to inflammatory diseases. Although therapies targeting Notch signaling in inflammation in theory are attractive, their design and implementation have proven difficult, at least partly due to the broad involvement of Notch signaling in regenerative and homeostatic processes. In this review, we summarize the supporting role of Notch signaling in various inflammation-driven diseases, and highlight efforts to intervene with this pathway by targeting Notch ligands and/or receptors with distinct therapeutic strategies, including antibody designs. We discuss this in light of lessons learned from Notch targeting in cancer treatment. Finally, we elaborate on the impact of individual Notch members in inflammation, which may lay the foundation for development of therapeutic strategies in chronic inflammatory diseases.
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Affiliation(s)
| | - Torleif T. Gjølberg
- Institute of Clinical Medicine and Department of Pharmacology, University of Oslo and Oslo University Hospital, Oslo, Norway
- Centre for Eye Research and Department of Ophthalmology, University of Oslo and Oslo University Hospital, Oslo, Norway
- Department of Immunology, University of Oslo and Oslo University Hospital, Oslo, Norway
| | - Stig Krüger
- Department of Pathology, University of Oslo and Oslo University Hospital, Oslo, Norway
| | - Guttorm Haraldsen
- Department of Pathology, University of Oslo and Oslo University Hospital, Oslo, Norway
| | - Jan Terje Andersen
- Institute of Clinical Medicine and Department of Pharmacology, University of Oslo and Oslo University Hospital, Oslo, Norway
- Department of Immunology, University of Oslo and Oslo University Hospital, Oslo, Norway
| | - Eirik Sundlisæter
- Department of Pathology, University of Oslo and Oslo University Hospital, Oslo, Norway
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Xie J, Wen J, Chen C, Luo M, Hu B, Wu D, Ye J, Lin Y, Ning L, Ning Y, Li Y. Notch 1 Is Involved in CD4 + T Cell Differentiation Into Th1 Subtype During Helicobacter pylori Infection. Front Cell Infect Microbiol 2020; 10:575271. [PMID: 33224898 PMCID: PMC7667190 DOI: 10.3389/fcimb.2020.575271] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Accepted: 09/24/2020] [Indexed: 12/14/2022] Open
Abstract
Helicobacter pylori infection induces CD4+ T differentiation cells into IFN-γ-producing Th1 cells. However, the details of mechanism underlying this process remain unclear. Notch signal pathway has been reported to regulate the differentiation of CD4+ T cells into Th1 subtype in many Th1-mediated inflammatory disorders but not yet in H. pylori infection. In the present study, the mRNA expression pattern of CD4+ T cells in H. pylori-infected patients differed from that of healthy control using Human Signal Transduction Pathway Finder RT2 Profiler PCR Array, and this alteration was associated with Notch signal pathway, as analyzed by Bioinformation. Quantitative real-time PCR showed that the mRNA expression of Notch1 and its target gene Hes-1 in CD4+ T cells of H. pylori-infected individuals increased compared with the healthy controls. In addition, the mRNA expression of Th1 master transcription factor T-bet and Th1 signature cytokine IFN-γ was both upregulated in H. pylori-infected individuals and positively correlated with Notch1 expression. The increased protein level of Notch1 and IFN-γ were also observed in H. pylori-infected individuals confirmed by flow cytometry and ELISA. In vitro, inhibition of Notch signaling decreased the mRNA expression of Notch1, Hes-1, T-bet, and IFN-γ, and reduced the protein levels of Notch1 and IFN-γ and the secretion of IFN-γ in CD4+ T cells stimulated by H. pylori. Collectively, this is the first evidence that Notch1 is upregulated and involved in the differentiation of Th1 cells during H. pylori infection, which will facilitate exploiting Notch1 as a therapeutic target for the control of H. pylori infection.
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Affiliation(s)
- Jinling Xie
- School of Laboratory Medicine and Biotechnology, Southern Medical University, Guangzhou, China.,Affiliated Xinhui People's Hospital, Southern Medical University, Jiangmen, China
| | - Junjie Wen
- School of Laboratory Medicine and Biotechnology, Southern Medical University, Guangzhou, China
| | - Chuxi Chen
- School of Laboratory Medicine and Biotechnology, Southern Medical University, Guangzhou, China
| | - Meiqun Luo
- School of Laboratory Medicine and Biotechnology, Southern Medical University, Guangzhou, China
| | - Bingxin Hu
- School of Laboratory Medicine and Biotechnology, Southern Medical University, Guangzhou, China
| | - Danlin Wu
- School of Laboratory Medicine and Biotechnology, Southern Medical University, Guangzhou, China
| | - Jianbin Ye
- School of Laboratory Medicine and Biotechnology, Southern Medical University, Guangzhou, China
| | - Yanqing Lin
- School of Laboratory Medicine and Biotechnology, Southern Medical University, Guangzhou, China
| | - Lijun Ning
- School of Laboratory Medicine and Biotechnology, Southern Medical University, Guangzhou, China
| | - Yunshan Ning
- School of Laboratory Medicine and Biotechnology, Southern Medical University, Guangzhou, China
| | - Yan Li
- School of Laboratory Medicine and Biotechnology, Southern Medical University, Guangzhou, China
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Down-regulation of lncRNA MALAT1 alleviates vascular lesion and vascular remodeling of rats with hypertension. Aging (Albany NY) 2020; 11:5192-5205. [PMID: 31343412 PMCID: PMC6682528 DOI: 10.18632/aging.102113] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Accepted: 07/16/2019] [Indexed: 12/28/2022]
Abstract
Objective: Recently, the effect of long non-coding RNAs (lncRNAs) in hypertension (HTN) has been identified. This study aims to explore the expression of lncRNA metastasis-associated lung adenocarcinoma transcript 1 (MALAT1) in HTN and its role in vascular lesion and remodeling of HTN rats. Results: LncRNA MALAT1 expression was up-regulated in HTN patients, and lncRNA MALAT1 could be an effective index of HTN diagnosis. Down-regulated MALAT1 and inhibited Notch-1 could reduce relative factor expression, including inflammation-related factors, endothelial function-related factors and oxidative stress-related factors, and inhibit apoptosis of aortic endothelial cells of HTN rats. Methods: LncRNA MALAT1 expression in HTN patients and healthy controls was detected by reverse transcription quantitative polymerase chain reaction (RT-qPCR). Angiotensin II (Ang II)-induced HTN rat models were injected with MALAT1-siRNA, empty lentivirus vector, Notch pathway inhibitor (DAPT) and dimethyl sulphoxide (DMSO) via caudal vein. After three-week treatment, changes of blood pressure, inflammatory factor levels, endothelial function-related factors, oxidative stress indices and apoptosis of vascular endothelial cells were determined by a series of assays. Conclusion: This study revealed that down-regulated lncRNA MALAT1 could alleviate the vascular lesion and remodeling of HTN rats, the mechanism may be related to the inhibited activation of Notch signaling pathway.
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Ning F, Li X, Yu L, Zhang B, Zhao Y, Liu Y, Zhao B, Shang Y, Hu X. Hes1 attenuates type I IFN responses via VEGF-C and WDFY1. J Exp Med 2019; 216:1396-1410. [PMID: 31015298 PMCID: PMC6547865 DOI: 10.1084/jem.20180861] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2018] [Revised: 10/22/2018] [Accepted: 04/04/2019] [Indexed: 12/26/2022] Open
Abstract
Transcription factor Hes1 acts as a homeostatic negative regulator of type I interferon production to restrain interferon-mediated immune responses, including antiviral immunity and autoimmune conditions. Mechanistically, Hes1 suppresses interferon expression by targeting a regulatory circuit composed of WDFY1 and VEGF-C. Induction of type I interferons (IFNs) is critical for eliciting competent immune responses, especially antiviral immunity. However, uncontrolled IFN production contributes to pathogenesis of autoimmune and inflammatory diseases. We found that transcription factor Hes1 suppressed production of type I IFNs and expression of IFN-stimulated genes. Functionally, Hes1-deficient mice displayed a heightened IFN signature in vivo, mounted enhanced resistance against encephalomyocarditis virus infection, and showed signs of exacerbated experimental lupus nephritis. Mechanistically, Hes1 did not suppress IFNs via direct transcriptional repression of IFN-encoding genes. Instead, Hes1 attenuated activation of TLR upstream signaling by inhibition of an adaptor molecule, WDFY1. Genome-wide assessment of Hes1 occupancy revealed that suppression of WDFY1 was secondary to direct binding and thus enhancement of expression of VEGF-C by Hes1, making Vegfc a rare example of an Hes1 positively regulated gene. In summary, these results identified Hes1 as a homeostatic negative regulator of type I IFNs for the maintenance of immune balance in the context of antiviral immunity and autoimmune diseases.
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Affiliation(s)
- Fei Ning
- Institute for Immunology and School of Medicine, Tsinghua University, Beijing, China.,Tsinghua-Peking Center for Life Sciences, Tsinghua University, Beijing, China.,Beijing Key Laboratory for Immunological Research on Chronic Diseases, Beijing, China
| | - Xiaoyu Li
- Institute for Immunology and School of Medicine, Tsinghua University, Beijing, China.,Beijing Key Laboratory for Immunological Research on Chronic Diseases, Beijing, China
| | - Li Yu
- Institute for Immunology and School of Medicine, Tsinghua University, Beijing, China.,Tsinghua-Peking Center for Life Sciences, Tsinghua University, Beijing, China.,Beijing Key Laboratory for Immunological Research on Chronic Diseases, Beijing, China
| | - Bin Zhang
- Institute for Immunology and School of Medicine, Tsinghua University, Beijing, China.,Beijing Key Laboratory for Immunological Research on Chronic Diseases, Beijing, China
| | - Yuna Zhao
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control & Prevention, College of Veterinary Medicine, Shandong Agricultural University, Taian, China
| | - Yu Liu
- State Key Laboratory of Virology, Medical Research Institute, College of Life Sciences, Wuhan University, Wuhan, China
| | - Baohong Zhao
- Arthritis and Tissue Degeneration Program, David Z. Rosensweig Genomics Research Center, Hospital for Special Surgery, New York, NY.,Department of Medicine, Weill Cornell Medical College, New York, NY
| | - Yingli Shang
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control & Prevention, College of Veterinary Medicine, Shandong Agricultural University, Taian, China
| | - Xiaoyu Hu
- Institute for Immunology and School of Medicine, Tsinghua University, Beijing, China .,Beijing Key Laboratory for Immunological Research on Chronic Diseases, Beijing, China
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Ellinghaus U, Cortini A, Pinder CL, Le Friec G, Kemper C, Vyse TJ. Dysregulated CD46 shedding interferes with Th1-contraction in systemic lupus erythematosus. Eur J Immunol 2017; 47:1200-1210. [PMID: 28444759 PMCID: PMC5507296 DOI: 10.1002/eji.201646822] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2016] [Revised: 03/01/2017] [Accepted: 04/20/2017] [Indexed: 12/23/2022]
Abstract
IFN‐γ‐producing T helper 1 (Th1) cell responses mediate protection against infections but uncontrolled Th1 activity also contributes to a broad range of autoimmune diseases. Autocrine complement activation has recently emerged as key in the induction and contraction of human Th1 immunity: activation of the complement regulator CD46 and the C3aR expressed by CD4+ T cells via autocrine generated ligands C3b and C3a, respectively, are critical to IFN‐γ production. Further, CD46‐mediated signals also induce co‐expression of immunosuppressive IL‐10 in Th1 cells and transition into a (self)‐regulating and contracting phase. In consequence, C3 or CD46‐deficient patients suffer from recurrent infections while dysregulation of CD46 signaling contributes to Th1 hyperactivity in rheumatoid arthritis and multiple sclerosis. Here, we report a defect in CD46‐regulated Th1 contraction in patients with systemic lupus erythematosus (SLE). We observed that MMP‐9‐mediated increased shedding of soluble CD46 by Th1 cells was associated with this defect and that inhibition of MMP‐9 activity normalized release of soluble CD46 and restored Th1 contraction in patients’ T cells. These data may deliver the first mechanistic explanation for the increased serum CD46 levels observed in SLE patients and indicate that targeting CD46‐cleaving proteases could be a novel avenue to modulate Th1 responses.
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Affiliation(s)
- Ursula Ellinghaus
- Division of Genetics and Molecular Medicine, Department of Medical and Molecular Genetics, King's College London, Guy's Hospital, London, UK
| | - Andrea Cortini
- Division of Genetics and Molecular Medicine, Department of Medical and Molecular Genetics, King's College London, Guy's Hospital, London, UK
| | - Christopher L Pinder
- Division of Genetics and Molecular Medicine, Department of Medical and Molecular Genetics, King's College London, Guy's Hospital, London, UK
| | - Gaelle Le Friec
- MRC Centre for Transplantation, Division of Transplant Immunology and Mucosal Biology, King's College London, UK
| | - Claudia Kemper
- MRC Centre for Transplantation, Division of Transplant Immunology and Mucosal Biology, King's College London, UK.,Laboratory of Molecular Immunology and the Immunology Center, National Heart, Lung, and Blood Institute (NHLBI), National Institutes of Health (NIH), Bethesda, MD, USA
| | - Timothy J Vyse
- Division of Genetics and Molecular Medicine, Department of Medical and Molecular Genetics, King's College London, Guy's Hospital, London, UK
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Li X, Liu F, Zhang X, Shi G, Ren J, Ji J, Ding L, Fan H, Dou H, Hou Y. Notch-Hes-1 axis controls TLR7-mediated autophagic death of macrophage via induction of P62 in mice with lupus. Cell Death Dis 2016; 7:e2341. [PMID: 27537524 PMCID: PMC5108329 DOI: 10.1038/cddis.2016.244] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2016] [Revised: 07/11/2016] [Accepted: 07/12/2016] [Indexed: 01/21/2023]
Abstract
The increased death of macrophages has been considered as a pathogenic factor for systemic lupus erythematosus (SLE), and dysfunction of autophagy may contribute to improper cell death. However, the effect of autophagy on macrophage during the pathogenesis of SLE is still unclear. Here we found that the death rate and autophagy level of macrophages significantly increased in MRL/lpr lupus-prone mice. Activation of toll-like receptor 7 (TLR7) triggered macrophage death in an autophagy-dependent but caspase-independent way in vitro. Moreover, P62/SQSTM1 is thought to have an essential role in selective autophagy. We also demonstrated that P62/SQSTM1 was required for TLR7-induced autophagy, and knockdown of P62 suppressed R848-induced cell death and LC3II protein accumulation. As an important mediator for cell-cell communication, Notch signaling is responsible for cell-fate decisions. Our results showed that activation of TLR7 also upregulated the expression of Notch1, especially its downstream target gene Hairy and enhancer of split 1 (Hes-1) in macrophages. Of note, we found that Hes-1, as a transcriptional factor, controlled TLR7-induced autophagy by regulating P62 expression. Furthermore, to confirm the above results in vivo, TLR7 agonist imiquimod (IMQ)-induced lupus mouse model was prepared. Splenic macrophages from IMQ-treated mice exhibited increased autophagy and cell death as well as enhanced expressions of Notch1 and Hes-1. Our results indicate that Notch1-Hes-1 signaling controls TLR7-induced autophagic death of macrophage via regulation of P62 in mice with lupus.
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Affiliation(s)
- Xiaojing Li
- The State Key Laboratory of Pharmaceutical Biotechnology, Division of Immunology, Medical School, Nanjing University, Nanjing 210093, China
| | - Fei Liu
- The State Key Laboratory of Pharmaceutical Biotechnology, Division of Immunology, Medical School, Nanjing University, Nanjing 210093, China
| | - Xuefang Zhang
- The State Key Laboratory of Pharmaceutical Biotechnology, Division of Immunology, Medical School, Nanjing University, Nanjing 210093, China
| | - Guoping Shi
- The State Key Laboratory of Pharmaceutical Biotechnology, Division of Immunology, Medical School, Nanjing University, Nanjing 210093, China
| | - Jing Ren
- The State Key Laboratory of Pharmaceutical Biotechnology, Division of Immunology, Medical School, Nanjing University, Nanjing 210093, China
| | - Jianjian Ji
- The State Key Laboratory of Pharmaceutical Biotechnology, Division of Immunology, Medical School, Nanjing University, Nanjing 210093, China
| | - Liang Ding
- The State Key Laboratory of Pharmaceutical Biotechnology, Division of Immunology, Medical School, Nanjing University, Nanjing 210093, China
| | - Hongye Fan
- State Key Laboratory of Natural Medicines, School of Life Science and Technology, China Pharmaceutical University, Nanjing 210009, China
| | - Huan Dou
- The State Key Laboratory of Pharmaceutical Biotechnology, Division of Immunology, Medical School, Nanjing University, Nanjing 210093, China
- Jiangsu Key Laboratory of Molecular Medicine, Nanjing 210093, China
| | - Yayi Hou
- The State Key Laboratory of Pharmaceutical Biotechnology, Division of Immunology, Medical School, Nanjing University, Nanjing 210093, China
- Jiangsu Key Laboratory of Molecular Medicine, Nanjing 210093, China
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Gawdat RM, Hammam AA, Ezzat DA. Correlation of Notch1/Hes1 Genes Expression Levels in Egyptian Paediatric Patients with Newly Diagnosed and Persistent Primary Immune(Idiopathic) Thrombocytopenic Purpura. Indian J Hematol Blood Transfus 2016; 32:362-7. [PMID: 27429531 DOI: 10.1007/s12288-015-0570-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2015] [Accepted: 07/06/2015] [Indexed: 01/18/2023] Open
Abstract
Notch signalling is involved in the development of several autoimmune diseases, one of such diseases is ITP. The aim of this study was to investigate and compare the expression levels of Notch1 receptor and its target Hes1 gene in Egyptian paediatric ITP patients. Real-time quantitative reverse transcriptase polymerase chain reaction was used to analyse the expression levels of Notch1 and Hes1 in 42 children with primary ITP (22 newly diagnosed and 20 persistent) cases. Twenty age and sex matched non-ITP controls were included. The expression levels of Notch1 were higher in newly diagnosed and persistent cases than controls with high statistical significant difference (P value < 0.001, P < 0.001) respectively, similarly as regards the expression levels of HES1 (P value < 0.001, P < 0.007) respectively. A significant positive correlation was found between Notch1 and Hes1 expression levels in newly diagnosed cases (r = 0.587, P value = 0.004). There was an association between levels of both genes in most of ITP patients but Hes1 was markedly elevated than Notch1 in few cases. High expression levels of Notch1/Hes1 indicated the important role of Notch signalling in both newly diagnosed and persistent ITP. High expression levels of Hes1 than Notch1 may shed light on its value as a therapeutic target for future research in ITP.
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Affiliation(s)
- Rania Mohsen Gawdat
- Department of Clinical Pathology, Faculty of Medicine, Beni Suef University, Beni Suef, Egypt
| | - Amira Ahmed Hammam
- Department of Clinical Pathology, Faculty of Medicine, Beni Suef University, Beni Suef, Egypt
| | - Dina Ahmed Ezzat
- Department of Pediatrics, Faculty of Medicine, Beni Suef University, Beni Suef, Egypt
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10
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The transcriptional repressor Hes1 attenuates inflammation by regulating transcription elongation. Nat Immunol 2016; 17:930-7. [PMID: 27322654 PMCID: PMC4955730 DOI: 10.1038/ni.3486] [Citation(s) in RCA: 62] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2016] [Accepted: 05/05/2016] [Indexed: 12/15/2022]
Abstract
Most of the known regulatory mechanisms that curb inflammatory gene expression target pre-transcription-initiation steps, and evidence for post-initiation regulation of inflammatory gene expression remains scarce. We found that the transcriptional repressor Hes1 suppressed production of CXCL1, a chemokine that is crucial for recruiting neutrophils. Hes1 negatively regulated neutrophil recruitment in vivo in a manner that was dependent on macrophage-produced CXCL1, and it attenuated the severity of inflammatory arthritis. Mechanistically, inhibition of Cxcl1 expression by Hes1 did not involve modification of transcription initiation. Instead, Hes1 inhibited signal-induced recruitment of the positive transcription-elongation complex P-TEFb and thereby prevented phosphorylation of RNA polymerase II at Ser2 and productive elongation. Thus, our results identify Hes1 as a homeostatic suppressor of inflammatory responses that exerts its suppressive function by regulating transcription elongation.
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11
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Xie L, Lin W, Dai K. Recent Advances in αβ T Cell Biology: Wnt Signaling, Notch Signaling, Hedgehog Signaling and Their Translational Perspective. AIMS MEDICAL SCIENCE 2016. [DOI: 10.3934/medsci.2016.3.312] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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12
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Lin W, Dai K, Xie L. Recent Advances in αβ T Cell Biology: Wnt Signaling, Notch Signaling, Hedgehog Signaling and Their Translational Perspective. AIMS MEDICAL SCIENCE 2016. [DOI: 10.3934/medsci.2016.4.312] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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13
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XIAO GONG, NING WANGBIN, ZHANG CHUNHU, WU SHIYAO, ZUO XIAOXIA. Inhibiting Notch-1 reduces the expression of Toll-like receptor 9 in BABL/C-lpr mouse kidneys and improves glucocorticoid sensitivity. Mol Med Rep 2015; 12:2765-70. [DOI: 10.3892/mmr.2015.3758] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2014] [Accepted: 04/10/2015] [Indexed: 11/06/2022] Open
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14
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Kuksin CA, Minter LM. The Link between Autoimmunity and Lymphoma: Does NOTCH Signaling Play a Contributing Role? Front Oncol 2015; 5:51. [PMID: 25759795 PMCID: PMC4338678 DOI: 10.3389/fonc.2015.00051] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2014] [Accepted: 02/11/2015] [Indexed: 12/17/2022] Open
Abstract
An association between certain autoimmune conditions and increased risk of developing lymphoma is well documented. Recent evidence points to NOTCH signaling as a strong driver of autoimmunity. Furthermore, a role for NOTCH in various lymphomas, including classical Hodgkin lymphoma, non-Hodgkin lymphoma, and T cell lymphoma has also been described. In this mini-review, we will outline what is known about involvement of NOTCH signaling in those autoimmune conditions, such as rheumatoid arthritis and primary Sjörgren’s syndrome, which show an increased risk for subsequent diagnosis of lymphoma. Furthermore, we will detail what is known about the lymphomas associated with these autoimmune conditions and how aberrant or sustained NOTCH signaling in the immune cells that mediate these diseases may contribute to lymphoma.
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Affiliation(s)
- Christina Arieta Kuksin
- Department of Veterinary and Animal Sciences, University of Massachusetts Amherst , Amherst, MA , USA
| | - Lisa M Minter
- Department of Veterinary and Animal Sciences, University of Massachusetts Amherst , Amherst, MA , USA ; Program in Molecular and Cellular Biology, University of Massachusetts Amherst , Amherst, MA , USA
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15
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Expression of Notch signaling components in cutaneous foreign body and sarcoidal granulomas and fusing macrophages. Am J Dermatopathol 2014; 36:409-13. [PMID: 24394305 DOI: 10.1097/dad.0b013e3182a730cb] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The evolutionarily conserved Notch signaling pathway affects tissue-specific cell differentiation, proliferation, and apoptosis. In the immune system, Notch has been implicated in the development and function of both adoptive and innate immune cells. Notch signaling is initiated by Notch receptor binding to cognate ligands, which results in the enzymatic cleavage and intranuclear translocation of the intracellular domain of Notch receptor (ICN). Recent murine models of chronic inflammation highlighted a critical role for a Notch ligand, Delta-like ligand (Dll)-4, in granuloma formation. In this study, we aimed to assess Notch-1 receptor activation and Dll4 expression in human cutaneous granulomas and in cultured human macrophages and multinucleated giant cells. ICN1 and Dll4 expression was evaluated by immunohistochemistry of cutaneous foreign body (n = 15) and sarcoidal (n = 19) granulomas. The results showed consistent intranuclear staining for ICN1 in foreign body but not in sarcoidal granulomas and strong cytoplasmic staining for Dll4 in mononuclear histiocytes and multinucleate giant cells in both types of granulomas. Additionally, immunofluorescence confocal microscopy showed ICN1 and Dll4 expression by cultured human macrophages undergoing fusion in the presence of granulocyte-macrophage colony-stimulating factor and interleukin-4. These findings indicate a potential role for the Notch-1-Dll4 signaling pathway in foreign body-induced granulomatous reactions and possibly distinct Notch pathway utilization in sarcoidal granulomas.
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Mota C, Nunes-Silva V, Pires AR, Matoso P, Victorino RMM, Sousa AE, Caramalho I. Delta-like 1-mediated Notch signaling enhances the in vitro conversion of human memory CD4 T cells into FOXP3-expressing regulatory T cells. THE JOURNAL OF IMMUNOLOGY 2014; 193:5854-62. [PMID: 25367118 DOI: 10.4049/jimmunol.1400198] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
FOXP3-expressing regulatory T cells (Treg) are essential for the prevention of autoimmunity and were shown to be reduced and/or dysfunctional in several autoimmune diseases. Although Treg-based adoptive transfer represents a promising therapy, the large cell number required to achieve clinical efficacy constitutes an important limitation. Therefore, novel strategies to generate bona fide in vitro-induced Treg (iTreg) are critical. In this study, we report that human memory CD4 T cells can be efficiently converted into iTreg, and that Delta-like 1 (DL1)-mediated Notch signaling significantly enhances this process. The iTreg generated in the presence of DL1 featured higher levels of Treg function-associated molecules and were efficient suppressors. Importantly, these iTreg displayed a stable phenotype in long-term cultures, even in the presence of proinflammatory cytokines. Additionally, DL1 potentiated FOXP3 acquisition by memory CD4 cells through the modulation of the TGF-β signaling pathway and of Foxp3 transcription. Our data demonstrate that iTreg can be efficiently induced from memory CD4 cells, a subset enriched in relevant specificities for targeting in autoimmune diseases, and that DL1 enhances this process. DL1 also enhanced the proliferation and Treg function-associated marker expression of ex vivo-stimulated human circulating FOXP3(+) cells. Manipulation of the Notch signaling pathway constitutes a promising approach to boost the in vitro generation of iTreg and ex vivo Treg expansion, thus facilitating the establishment of effective Treg-based adoptive therapy in autoimmune diseases.
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Affiliation(s)
- Catarina Mota
- Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, 1649-028 Lisbon, Portugal; and Hospital Universitário de Santa Maria, Centro Hospitalar Lisboa Norte, 1649-035 Lisbon, Portugal
| | - Vânia Nunes-Silva
- Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, 1649-028 Lisbon, Portugal; and
| | - Ana R Pires
- Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, 1649-028 Lisbon, Portugal; and
| | - Paula Matoso
- Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, 1649-028 Lisbon, Portugal; and
| | - Rui M M Victorino
- Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, 1649-028 Lisbon, Portugal; and Hospital Universitário de Santa Maria, Centro Hospitalar Lisboa Norte, 1649-035 Lisbon, Portugal
| | - Ana E Sousa
- Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, 1649-028 Lisbon, Portugal; and
| | - Iris Caramalho
- Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, 1649-028 Lisbon, Portugal; and
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Lu MC, Yu CL, Chen HC, Yu HC, Huang HB, Lai NS. Aberrant T cell expression of Ca2+ influx-regulated miRNAs in patients with systemic lupus erythematosus promotes lupus pathogenesis. Rheumatology (Oxford) 2014; 54:343-8. [DOI: 10.1093/rheumatology/keu322] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Zhou D, Huang C, Lin Z, Zhan S, Kong L, Fang C, Li J. Macrophage polarization and function with emphasis on the evolving roles of coordinated regulation of cellular signaling pathways. Cell Signal 2014; 26:192-7. [DOI: 10.1016/j.cellsig.2013.11.004] [Citation(s) in RCA: 393] [Impact Index Per Article: 39.3] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2013] [Accepted: 11/01/2013] [Indexed: 02/06/2023]
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Rauen T, Grammatikos AP, Hedrich CM, Floege J, Tenbrock K, Ohl K, Kyttaris VC, Tsokos GC. cAMP-responsive element modulator α (CREMα) contributes to decreased Notch-1 expression in T cells from patients with active systemic lupus erythematosus (SLE). J Biol Chem 2012; 287:42525-32. [PMID: 23124208 DOI: 10.1074/jbc.m112.425371] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Notch signaling constitutes an evolutionarily conserved pathway that transduces signals between neighboring cells and determines major decisions in cell proliferation, survival, and differentiation. Notch signaling has been shown to play a pivotal role during T cell lineage determination. T lymphocytes from patients with systemic lupus erythematosus (SLE) display a severely altered phenotype with several molecular and functional aberrations, including defective capacities to up-regulate Notch-1 receptor expression upon T cell receptor activation. Here, we demonstrate that basal Notch-1 expression is decreased in T cells from active SLE patients at the mRNA and protein levels in various T cell subpopulations. Notch-1 transcript numbers inversely correlate with disease activity in SLE patients. We provide evidence that both enhanced histone H3 methylation and CpG DNA methylation of the human Notch-1 promoter contribute to decreased Notch-1 expression in SLE T cells. Previous data from our group identified cAMP-responsive element modulator α (CREMα), which is up-regulated in SLE T cells, as a key regulator of epigenetic patterns and gene transcription, e.g. that of IL2 and IL17 genes. In this study, we observed increased CREMα binding to the Notch-1 promoter, which eventually resulted in significantly reduced Notch-1 promoter activity and gene transcription. Notably, decreased Notch-1 levels were associated with elevated IL-17A levels. Our data suggest a role for Notch-1 in SLE immunopathogenesis, and for the first time, we present molecular mechanisms that mediate dysregulated Notch-1 expression in SLE T cells.
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Affiliation(s)
- Thomas Rauen
- Division of Rheumatology, Department of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts 02115, USA
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Ulasov IV, Nandi S, Dey M, Sonabend AM, Lesniak MS. Inhibition of Sonic hedgehog and Notch pathways enhances sensitivity of CD133(+) glioma stem cells to temozolomide therapy. Mol Med 2010; 17:103-12. [PMID: 20957337 DOI: 10.2119/molmed.2010.00062] [Citation(s) in RCA: 132] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2010] [Accepted: 10/14/2010] [Indexed: 12/21/2022] Open
Abstract
Malignant gliomas are currently treated with temozolomide (TMZ), but often exhibit resistance to this agent. CD133(+) cancer stem cells, a population believed to contribute to the tumor's chemoresistance, bear the activation of Notch and Sonic hedgehog (SHH) pathways. In this study, we examined whether inhibition of both pathways enhances the efficacy of TMZ monotherapy in the context of glioma stem cells. Transcriptional analysis of Notch and SHH pathways in CD133(+)-enriched glioma cell populations showed the activity of these pathways. CD133(+) cells were less susceptible to TMZ treatment than the unsorted glioma counterparts. Interestingly, Notch and SHH pathway transcriptional activity in CD133(+) glioma cells was further enhanced by TMZ exposure, which led to NOTCH 1, NCOR2, and GLI1 upregulation (6.64-, 3.73-, and 2.79-fold, respectively) and CFLAR downregulation (4.22-fold). The therapeutic effect of TMZ was enhanced by Notch and SHH pathway pharmacological antagonism with GSI-1 and cyclopamine. More importantly, simultaneous treatment involving TMZ with both of these compounds led to a significant increase in CD133(+) glioma cytotoxicity than treatment with any of these agents alone (P < 0.05). In conclusion, CD133(+) glioma cells overexpress genes involved in Notch and SHH pathways. These pathways contribute to the chemoresistant phenotype of CD133(+) glioma cells, as their antagonism leads to an additive effect when used in combination with TMZ.
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Affiliation(s)
- Ilya V Ulasov
- The Brain Tumor Cancer Center, The University of Chicago, Chicago, IL, USA
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Future perspectives: therapeutic targeting of notch signalling may become a strategy in patients receiving stem cell transplantation for hematologic malignancies. BONE MARROW RESEARCH 2010; 2011:570796. [PMID: 22046566 PMCID: PMC3200006 DOI: 10.1155/2011/570796] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/26/2010] [Accepted: 08/30/2010] [Indexed: 12/26/2022]
Abstract
The human Notch system consists of 5 ligands and 4 membrane receptors with promiscuous ligand binding, and Notch-initiated signalling interacts with a wide range of other intracellular pathways. The receptor signalling seems important for regulation of normal and malignant hematopoiesis, development of the cellular immune system, and regulation of immune responses. Several Notch-targeting agents are now being developed, including natural receptor ligands, agonistic and antagonistic antibodies, and inhibitors of intracellular Notch-initiated signalling. Some of these agents are in clinical trials, and several therapeutic strategies seem possible in stem cell recipients: (i) agonists may be used for stem cell expansion and possibly to enhance posttransplant lymphoid reconstitution; (ii) receptor-specific agonists or antagonists can be used for immunomodulation; (iii) Notch targeting may have direct anticancer effects. Although the effects of therapeutic targeting are difficult to predict due to promiscuous ligand binding, targeting of this system may represent an opportunity to achieve combined effects with earlier posttransplant reconstitution, immunomodulation, or direct anticancer effects.
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Ma D, Zhu Y, Ji C, Hou M. Targeting the Notch signaling pathway in autoimmune diseases. Expert Opin Ther Targets 2010; 14:553-65. [DOI: 10.1517/14728221003752750] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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Ma D, Dai J, Zhu X, Yan S, Zhao P, Zhang J, Zhu Y, Sun J, Peng J, Ji C, Hou M. Aberrant expression of Notch signaling molecules in patients with immune thrombocytopenic purpura. Ann Hematol 2009; 89:155-61. [DOI: 10.1007/s00277-009-0790-y] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2009] [Accepted: 06/30/2009] [Indexed: 11/29/2022]
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