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Xing X, Zhang X, Fan J, Zhang C, Zhang L, Duan R, Hao H. Neuroprotective Effects of Melittin Against Cerebral Ischemia and Inflammatory Injury via Upregulation of MCPIP1 to Suppress NF-κB Activation In Vivo and In Vitro. Neurochem Res 2024; 49:348-362. [PMID: 37812268 PMCID: PMC10787673 DOI: 10.1007/s11064-023-04030-7] [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: 06/27/2023] [Revised: 08/20/2023] [Accepted: 09/10/2023] [Indexed: 10/10/2023]
Abstract
Melittin, a principal constituent of honeybee venom, exhibits diverse biological effects, encompassing anti-inflammatory capabilities and neuroprotective actions against an array of neurological diseases. In this study, we probed the prospective protective influence of melittin on cerebral ischemia, focusing on its anti-inflammatory activity. Mechanistically, we explored whether monocyte chemotactic protein-induced protein 1 (MCPIP1, also known as ZC3H12A), a recently identified zinc-finger protein, played a role in melittin-mediated anti-inflammation and neuroprotection. Male C57/BL6 mice were subjected to distal middle cerebral artery occlusion to create a focal cerebral cortical ischemia model, with melittin administered intraperitoneally. We evaluated motor functions, brain infarct volume, cerebral blood flow, and inflammatory marker levels within brain tissue, employing quantitative real-time polymerase chain reaction, enzyme-linked immunosorbent assays, and western blotting. In vitro, an immortalized BV-2 microglia culture was stimulated with lipopolysaccharide (LPS) to establish an inflammatory cell model. Post-melittin exposure, cell viability, and cytokine expression were examined. MCPIP1 was silenced using siRNA in LPS-induced BV-2 cells, with the ensuing nuclear translocation of nuclear factor-κB assessed through cellular immunofluorescence. In vivo, melittin enhanced motor functions, diminished infarction, fostered blood flow restoration in ischemic brain regions, and markedly inhibited the expression of inflammatory cytokines (interleukin-1β, interleukin-6, tumor necrosis factor-α, and nuclear factor-κB). In vitro, melittin augmented MCPIP1 expression in LPS-induced BV-2 cells and ameliorated inflammation-induced cell death. The neuroprotective effect conferred by melittin was attenuated upon MCPIP1 knockdown. Our findings establish that melittin-induced tolerance to ischemic injury is intrinsically linked with its anti-inflammatory capacity. Moreover, MCPIP1 is, at the very least, partially implicated in this process.
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Affiliation(s)
- Xing Xing
- Department of Neurology, Second Hospital of Hebei Medical University, Shijiazhuang, China
- Department of Neurology, Hebei General Hospital, Shijiazhuang, China
- Hebei Key Laboratory of Vascular Homeostasis and Hebei Collaborative Innovation Center for Cardio-Cerebrovascular Disease, Shijiazhuang, China
| | - Xiangjian Zhang
- Department of Neurology, Second Hospital of Hebei Medical University, Shijiazhuang, China.
- Hebei Key Laboratory of Vascular Homeostasis and Hebei Collaborative Innovation Center for Cardio-Cerebrovascular Disease, Shijiazhuang, China.
| | - Jingyi Fan
- Department of Neurology, Second Hospital of Hebei Medical University, Shijiazhuang, China
- Hebei Key Laboratory of Vascular Homeostasis and Hebei Collaborative Innovation Center for Cardio-Cerebrovascular Disease, Shijiazhuang, China
| | - Cong Zhang
- Department of Neurology, Second Hospital of Hebei Medical University, Shijiazhuang, China
- Hebei Key Laboratory of Vascular Homeostasis and Hebei Collaborative Innovation Center for Cardio-Cerebrovascular Disease, Shijiazhuang, China
| | - Lan Zhang
- Department of Neurology, Second Hospital of Hebei Medical University, Shijiazhuang, China
- Hebei Key Laboratory of Vascular Homeostasis and Hebei Collaborative Innovation Center for Cardio-Cerebrovascular Disease, Shijiazhuang, China
| | - Ruisheng Duan
- Department of Neurology, Hebei General Hospital, Shijiazhuang, China
| | - Hongyu Hao
- Department of Neurology, Hebei General Hospital, Shijiazhuang, China
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Lin J, Lu Z, Li G, Zhang C, Lu H, Gao S, Zhu R, Huang H, Aden K, Wang J, Cong Y, Wu H, Liu Z. MCPIP-1-Mediated Immunosuppression of Neutrophils Exacerbates Acute Bacterial Peritonitis and Liver Injury. J Innate Immun 2022; 15:262-282. [PMID: 36273448 PMCID: PMC10643898 DOI: 10.1159/000526784] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2022] [Accepted: 08/24/2022] [Indexed: 11/17/2023] Open
Abstract
Monocyte chemotactic protein-1-induced protein-1 (MCPIP-1) is highly expressed in activated immune cells and negatively regulates immune responses, while the mechanisms underlying the immunoregulation of neutrophils in acute bacterial infection and liver injury remain elusive. Here, we examined the role of MCPIP-1 in regulating neutrophil functions during acute bacterial peritonitis and liver injury. Mice with myeloid cell-specific overexpression (McpipMye-tg) or knockout (McpipΔMye) of MCPIP-1 were generated. We found that reactive oxygen species and myeloperoxidase production, formation of neutrophil extracellular traps, and migratory capacity were deficient in McpipMye-tg neutrophils but enhanced in McpipΔMye neutrophils. The recruitment of neutrophils and pathogen clearance were markedly suppressed in McpipMye-tg mice following intraperitoneal infection with Salmonella typhimurium while intensified in McpipΔMye mice. Severe acute S. typhimurium-infected peritonitis and liver injury occurred in McpipMye-tg mice but were alleviated in McpipΔMye mice. RNA sequencing, RNA-binding protein immunoprecipitation and qPCR analysis revealed that MCPIP-1 downregulated the protective functions of neutrophils via degrading the mRNA of cold inducible RNA-binding protein. Consistently, MCPIP-1 was highly expressed in neutrophils of patients with acute infectious diseases, especially in those with liver injury. Collectively, we uncover that MCPIP-1 negatively regulates the antibacterial capacities of neutrophils, leading to exacerbating severe acute bacterial peritonitis and liver injury. It may serve as a candidate target for maintaining neutrophil homeostasis to control acute infectious diseases.
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Affiliation(s)
- Jian Lin
- Department of Gastroenterology, Shanghai Tenth People's Hospital of Tongji University School of Medicine, Shanghai, China
- Department of Gastroenterology, Affiliated Hospital of Putian University, Putian, China
| | - Zhanjun Lu
- Department of Gastroenterology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Gengfeng Li
- Department of Gastroenterology, Shanghai Tenth People's Hospital of Tongji University School of Medicine, Shanghai, China
| | - Cui Zhang
- Department of Gastroenterology, Shanghai Tenth People's Hospital of Tongji University School of Medicine, Shanghai, China
| | - Huiying Lu
- Department of Gastroenterology, Shanghai Tenth People's Hospital of Tongji University School of Medicine, Shanghai, China
| | - Sheng Gao
- Department of Bioinformatics, School of Life Sciences and Technology, Tongji University, Shanghai, China
| | - Ruixin Zhu
- Department of Bioinformatics, School of Life Sciences and Technology, Tongji University, Shanghai, China
| | - Hailiang Huang
- Analytic and Translational Genetics Unit, Massachusetts General Hospital, Boston, Massachusetts, USA
| | - Konrad Aden
- Department of Internal Medicine I, Institute of Clinical Molecular Biology, Christian-Albrechts-University, University Hospital Schleswig-Holstein, Campus Kiel, Kiel, Germany
| | - Jianhua Wang
- Storr Liver Unit, Westmead Millennium Institute, Westmead Hospital, University of Sydney, Sydney, New South Wales, Australia
| | - Yingzi Cong
- Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, Texas, USA
| | - Huili Wu
- Department of Gastroenterology, Zhengzhou Central Hospital Affiliated to Zhengzhou University, Zhengzhou, China
| | - Zhanju Liu
- Department of Gastroenterology, Shanghai Tenth People's Hospital of Tongji University School of Medicine, Shanghai, China
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Wadowska M, Dobosz E, Golda A, Bryzek D, Lech M, Fu M, Koziel J. MCP-Induced Protein 1 Participates in Macrophage-Dependent Endotoxin Tolerance. THE JOURNAL OF IMMUNOLOGY 2022; 209:1348-1358. [DOI: 10.4049/jimmunol.2101184] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Accepted: 07/28/2022] [Indexed: 11/06/2022]
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Ribeiro A, Dobosz E, Krill M, Köhler P, Wadowska M, Steiger S, Schmaderer C, Koziel J, Lech M. Macrophage-Specific MCPIP1/Regnase-1 Attenuates Kidney Ischemia-Reperfusion Injury by Shaping the Local Inflammatory Response and Tissue Regeneration. Cells 2022; 11:cells11030397. [PMID: 35159206 PMCID: PMC8834155 DOI: 10.3390/cells11030397] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Revised: 01/19/2022] [Accepted: 01/20/2022] [Indexed: 01/27/2023] Open
Abstract
Sterile inflammation either resolves the initial insult or leads to tissue damage. Kidney ischemia/reperfusion injury (IRI) is associated with neutrophilic infiltration, enhanced production of inflammatory mediators, accumulation of necrotic cells and tissue remodeling. Macrophage-dependent microenvironmental changes orchestrate many features of the immune response and tissue regeneration. The activation status of macrophages is influenced by extracellular signals, the duration and intensity of the stimulation, as well as various regulatory molecules. The role of macrophage-derived monocyte chemoattractant protein-induced protein 1 (MCPIP1), also known as Regnase-1, in kidney ischemia-reperfusion injury (IRI) and recovery from sterile inflammation remains unresolved. In this study, we showed that macrophage-specific Mcpip1 deletion significantly affects the kidney phenotype. Macrophage-specific Mcpip1 transgenic mice displayed enhanced inflammation and loss of the tubular compartment upon IRI. We showed that MCPIP1 modulates sterile inflammation by negative regulation of Irf4 expression and accumulation of IRF4+ cells in the tissue and, consequently, suppresses the post-ischemic kidney immune response. Thus, we identified MCPIP1 as an important molecular sentinel of immune homeostasis in experimental acute kidney injury (AKI) and renal fibrosis.
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Affiliation(s)
- Andrea Ribeiro
- LMU Klinikum, Medizinische Klinik und Poliklinik IV, Ludwig-Maximilians-Universität Munich, 80336 Munich, Germany; (A.R.); (M.K.); (P.K.); (S.S.)
- Department of Nephrology, Klinikum Rechts der Isar, Technical University Munich, 80336 Munich, Germany;
| | - Ewelina Dobosz
- Department of Microbiology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, 30-387 Krakow, Poland; (E.D.); (M.W.); (J.K.)
| | - Moritz Krill
- LMU Klinikum, Medizinische Klinik und Poliklinik IV, Ludwig-Maximilians-Universität Munich, 80336 Munich, Germany; (A.R.); (M.K.); (P.K.); (S.S.)
| | - Paulina Köhler
- LMU Klinikum, Medizinische Klinik und Poliklinik IV, Ludwig-Maximilians-Universität Munich, 80336 Munich, Germany; (A.R.); (M.K.); (P.K.); (S.S.)
| | - Marta Wadowska
- Department of Microbiology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, 30-387 Krakow, Poland; (E.D.); (M.W.); (J.K.)
| | - Stefanie Steiger
- LMU Klinikum, Medizinische Klinik und Poliklinik IV, Ludwig-Maximilians-Universität Munich, 80336 Munich, Germany; (A.R.); (M.K.); (P.K.); (S.S.)
| | - Christoph Schmaderer
- Department of Nephrology, Klinikum Rechts der Isar, Technical University Munich, 80336 Munich, Germany;
| | - Joanna Koziel
- Department of Microbiology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, 30-387 Krakow, Poland; (E.D.); (M.W.); (J.K.)
| | - Maciej Lech
- LMU Klinikum, Medizinische Klinik und Poliklinik IV, Ludwig-Maximilians-Universität Munich, 80336 Munich, Germany; (A.R.); (M.K.); (P.K.); (S.S.)
- Correspondence:
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Rakhra G, Rakhra G. Zinc finger proteins: insights into the transcriptional and post transcriptional regulation of immune response. Mol Biol Rep 2021; 48:5735-5743. [PMID: 34304391 PMCID: PMC8310398 DOI: 10.1007/s11033-021-06556-x] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2021] [Accepted: 07/08/2021] [Indexed: 12/18/2022]
Abstract
BACKGROUND Zinc finger proteins encompass one of the unique and large families of proteins with diversified biological functions in the human body. These proteins are primarily considered to be DNA binding transcription factors; however, owing to the diverse array of zinc-finger domains, they are able to interact with molecules other than DNA like RNA, proteins, lipids and PAR (poly-ADP-ribose). Evidences from recent scientific studies have provided an insight into the potential functions of zinc finger proteins in immune system regulation both at the transcriptional and post transcriptional level. However, the mechanism and importance of zinc finger proteins in the regulation of immune response is not very well defined and understood. This review highlights in detail the importance of zinc finger proteins in the regulation of immune system at transcriptional and post transcriptional level. CONCLUSION Different types of zinc finger proteins are involved in immune system regulation and their mechanism of regulation is discussed herewith.
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Affiliation(s)
- Gurseen Rakhra
- Department of Nutrition & Dietetics, Faculty of Allied Health Sciences, Manav Rachna International Institute of Research & Studies, Faridabad, Haryana, 121004, India
| | - Gurmeen Rakhra
- Department of Biochemistry, School of Bioengineering and Biosciences, Lovely Professional University, Phagwara, India.
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Liu B, Huang J, Ashraf A, Rahaman O, Lou J, Wang L, Cai P, Wen J, Anwaar S, Liu X, Ni H, Ganguly D, Zhao J, Yang CY. The RNase MCPIP3 promotes skin inflammation by orchestrating myeloid cytokine response. Nat Commun 2021; 12:4105. [PMID: 34215755 PMCID: PMC8253787 DOI: 10.1038/s41467-021-24352-w] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2020] [Accepted: 06/16/2021] [Indexed: 12/21/2022] Open
Abstract
CCCH zinc finger proteins resolve immune responses by degrading the mRNAs of inflammatory cytokines such as tumor necrosis factor (TNF) and interleukin (IL)-6. Here we report that one such family member, monocyte chemotactic protein-induced protein 3 (MCPIP3, also named ZC3H12C or Regnase-3), promotes skin inflammation by simultaneously enhancing TNF in macrophages and repressing IL-6 in plasmacytoid dendritic cells (pDCs). MCPIP3 is positively associated with psoriasis pathogenesis, and highly expressed by macrophages and pDCs. MCPIP3-deficient macrophages produce less TNF and IL-12p40. However, MCPIP3-deficient pDCs secrete significantly more IL-6. This enhanced intradermal IL-6 may alleviate imiquimod-induced skin inflammation. As a result, MCPIP3-deficient mice are protected from imiquimod-induced psoriasiform lesions. Furthermore, early exposure to pDC-derived IL-6 suppresses macrophage-derived TNF and IL-12p40. Mechanistically, MCPIP3 could directly degrade mRNAs of IL-6, Regnase-1, and IκBζ. In turn, Regnase-1 could degrade MCPIP3 mRNAs. Our study identifies a critical post-transcriptional mechanism that synchronizes myeloid cytokine secretion to initiate autoimmune skin inflammation. Zinc finger proteins are involved in the resolution of immune responses and function by degrading mRNA of inflammatory cytokines. Here the authors show MCPIP3 promotes skin inflammation via modification of cytokine profiles in pDCs and macrophages.
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Affiliation(s)
- Bo Liu
- Department of Immunology, Sun Yat-sen University, Zhongshan School of Medicine, Guangzhou, Guangdong, China
| | - Jiancheng Huang
- Department of Immunology, Sun Yat-sen University, Zhongshan School of Medicine, Guangzhou, Guangdong, China
| | - Amina Ashraf
- Department of Immunology, Sun Yat-sen University, Zhongshan School of Medicine, Guangzhou, Guangdong, China
| | - Oindrila Rahaman
- IICB-Translational Research Unit of Excellence, CSIR-Indian Institute of Chemical Biology, Kolkata, India
| | - Jing Lou
- Department of Immunology, Sun Yat-sen University, Zhongshan School of Medicine, Guangzhou, Guangdong, China
| | - Ling Wang
- Department of Immunology, Sun Yat-sen University, Zhongshan School of Medicine, Guangzhou, Guangdong, China
| | - Peiliang Cai
- Department of Immunology, Sun Yat-sen University, Zhongshan School of Medicine, Guangzhou, Guangdong, China
| | - Jinping Wen
- Department of Immunology, Sun Yat-sen University, Zhongshan School of Medicine, Guangzhou, Guangdong, China
| | - Shoaib Anwaar
- Department of Immunology, Sun Yat-sen University, Zhongshan School of Medicine, Guangzhou, Guangdong, China
| | - Xiaoli Liu
- Department of Immunology, Sun Yat-sen University, Zhongshan School of Medicine, Guangzhou, Guangdong, China
| | - Hai Ni
- Department of Immunology, Sun Yat-sen University, Zhongshan School of Medicine, Guangzhou, Guangdong, China
| | - Dipyaman Ganguly
- IICB-Translational Research Unit of Excellence, CSIR-Indian Institute of Chemical Biology, Kolkata, India
| | - Jijun Zhao
- Department of Rheumatology and Immunology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.
| | - Cliff Y Yang
- Department of Immunology, Sun Yat-sen University, Zhongshan School of Medicine, Guangzhou, Guangdong, China. .,Key Laboratory of Tropical Disease Control (Sun Yat-Sen University), Ministry of Education, Guangzhou, China.
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Subversion of Lipopolysaccharide Signaling in Gingival Keratinocytes via MCPIP-1 Degradation as a Novel Pathogenic Strategy of Inflammophilic Pathobionts. mBio 2021; 12:e0050221. [PMID: 34182783 PMCID: PMC8262937 DOI: 10.1128/mbio.00502-21] [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] [Indexed: 01/14/2023] Open
Abstract
Periodontal disease (PD) is an inflammatory disease of the supporting tissues of the teeth that develops in response to formation of a dysbiotic biofilm on the subgingival tooth surface. Although exacerbated inflammation leads to alveolar bone destruction and may cause tooth loss, the molecular basis of PD initiation and progression remains elusive. Control over the inflammatory reaction and return to homeostasis can be efficiently restored by negative regulators of Toll-like receptor (TLR) signaling pathways such as monocyte chemoattractant protein-induced protein 1 (MCPIP-1), which is constitutively expressed in gingival keratinocytes and prevents hyperresponsiveness in the gingiva. Here, we found that inflammophilic periodontal species influence the stability of MCPIP-1, leading to an aggravated response of the epithelium to proinflammatory stimulation. Among enzymes secreted by periodontal species, gingipains—cysteine proteases from Porphyromonas gingivalis—are considered major contributors to the pathogenic potential of bacteria, strongly influencing the components of the innate and adaptive immune system. Gingipain proteolytic activity leads to a rapid degradation of MCPIP-1, exacerbating the inflammatory response induced by endotoxin. Collectively, these results establish a novel mechanism of corruption of inflammatory signaling by periodontal pathogens, indicating new possibilities for treatment of this chronic disease.
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Liu Z, Wei N, Tang R. Functionalized Strategies and Mechanisms of the Emerging Mesh for Abdominal Wall Repair and Regeneration. ACS Biomater Sci Eng 2021; 7:2064-2082. [PMID: 33856203 DOI: 10.1021/acsbiomaterials.1c00118] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Meshes have been the overwhelmingly popular choice for the repair of abdominal wall defects to retrieve the bodily integrity of musculofascial layer. Broadly, they are classified into synthetic, biological and composite mesh based on their mechanical and biocompatible features. With the development of anatomical repair techniques and the increasing requirements of constructive remodeling, however, none of these options satisfactorily manages the conditional repair. In both preclinical and clinical studies, materials/agents equipped with distinct functions have been characterized and applied to improve mesh-aided repair, with the importance of mesh functionalization being highlighted. However, limited information exists on systemic comparisons of the underlying mechanisms with respect to functionalized strategies, which are fundamental throughout repair and regeneration. Herein, we address this topic and summarize the current literature by subdividing common functions of the mesh into biomechanics-matched, macrophage-mediated, integration-enhanced, anti-infective and antiadhesive characteristics for a comprehensive overview. In particular, we elaborate their effects separately with respect to host response and integration and discuss their respective advances, challenges and future directions toward a clinical alternative. From the vastly different approaches, we provide insight into the mechanisms involved and offer suggestions for personalized modifications of these emerging meshes.
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Affiliation(s)
- Zhengni Liu
- Department of Hernia and Abdominal Wall Surgery, Shanghai East Hospital, TongJi University, 150 Ji Mo Road, Shanghai 200120, PR China
| | - Nina Wei
- Department of Hernia and Abdominal Wall Surgery, Shanghai East Hospital, TongJi University, 150 Ji Mo Road, Shanghai 200120, PR China
| | - Rui Tang
- Department of Hernia and Abdominal Wall Surgery, Shanghai East Hospital, TongJi University, 150 Ji Mo Road, Shanghai 200120, PR China
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Stanfield BA, Purves T, Palmer S, Sullenger B, Welty-Wolf K, Haines K, Agarwal S, Kasotakis G. IL-10 and class 1 histone deacetylases act synergistically and independently on the secretion of proinflammatory mediators in alveolar macrophages. PLoS One 2021; 16:e0245169. [PMID: 33471802 PMCID: PMC7816993 DOI: 10.1371/journal.pone.0245169] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Accepted: 12/22/2020] [Indexed: 12/22/2022] Open
Abstract
Introduction Anti-inflammatory cytokine IL-10 suppresses pro-inflammatory IL-12b expression after Lipopolysaccharide (LPS) stimulation in colonic macrophages, as part of the innate immunity Toll-Like Receptor (TLR)-NF-κB activation system. This homeostatic mechanism limits excess inflammation in the intestinal mucosa, as it constantly interacts with the gut flora. This effect is reversed with Histone Deacetylase 3 (HDAC3), a class I HDAC, siRNA, suggesting it is mediated through HDAC3. Given alveolar macrophages’ prominent role in Acute Lung Injury (ALI), we aim to determine whether a similar regulatory mechanism exists in the typically sterile pulmonary microenvironment. Methods Levels of mRNA and protein for IL-10, and IL-12b were determined by qPCR and ELISA/Western Blot respectively in naïve and LPS-stimulated alveolar macrophages. Expression of the NF-κB intermediaries was also similarly assessed. Experiments were repeated with AS101 (an IL-10 protein synthesis inhibitor), MS-275 (a selective class 1 HDAC inhibitor), or both. Results LPS stimulation upregulated all proinflammatory mediators assayed in this study. In the presence of LPS, inhibition of IL-10 and/or class 1 HDACs resulted in both synergistic and independent effects on these signaling molecules. Quantitative reverse-transcriptase PCR on key components of the TLR4 signaling cascade demonstrated significant diversity in IL-10 and related gene expression in the presence of LPS. Inhibition of IL-10 secretion and/or class 1 HDACs in the presence of LPS independently affected the transcription of MyD88, IRAK1, Rela and the NF-κB p50 subunit. Interestingly, by quantitative ELISA inhibition of IL-10 secretion and/or class 1 HDACs in the presence of LPS independently affected the secretion of not only IL-10, IL-12b, and TNFα, but also proinflammatory mediators CXCL2, IL-6, and MIF. These results suggest that IL-10 and class 1 HDAC activity regulate both independent and synergistic mechanisms of proinflammatory cytokine/chemokine signaling. Conclusions Alveolar macrophages after inflammatory stimulation upregulate both IL-10 and IL-12b production, in a highly class 1 HDAC-dependent manner. Class 1 HDACs appear to help maintain the balance between the pro- and anti-inflammatory IL-12b and IL-10 respectively. Class 1 HDACs may be considered as targets for the macrophage-initiated pulmonary inflammation in ALI in a preclinical setting.
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Affiliation(s)
- Brent A. Stanfield
- Duke University Medical Center, Durham, North Carolina, United States of America
- Department of Surgery, Duke University Medical Center, Durham, North Carolina, United States of America
- Division of Trauma, Acute and Critical Care Surgery, Duke University Medical Center, Durham, North Carolina, United States of America
| | - Todd Purves
- Duke University Medical Center, Durham, North Carolina, United States of America
- Department of Surgery, Duke University Medical Center, Durham, North Carolina, United States of America
- Division of Urology, Duke University Medical Center, Durham, North Carolina, United States of America
| | - Scott Palmer
- Duke University Medical Center, Durham, North Carolina, United States of America
- Department of Medicine, Duke University Medical Center, Durham, North Carolina, United States of America
- Duke Clinical Research Institute, Durham, North Carolina, United States of America
| | - Bruce Sullenger
- Duke University Medical Center, Durham, North Carolina, United States of America
- Department of Surgery, Duke University Medical Center, Durham, North Carolina, United States of America
| | - Karen Welty-Wolf
- Duke University Medical Center, Durham, North Carolina, United States of America
- Department of Medicine, Duke University Medical Center, Durham, North Carolina, United States of America
| | - Krista Haines
- Duke University Medical Center, Durham, North Carolina, United States of America
- Department of Surgery, Duke University Medical Center, Durham, North Carolina, United States of America
- Division of Trauma, Acute and Critical Care Surgery, Duke University Medical Center, Durham, North Carolina, United States of America
| | - Suresh Agarwal
- Duke University Medical Center, Durham, North Carolina, United States of America
- Department of Surgery, Duke University Medical Center, Durham, North Carolina, United States of America
- Division of Trauma, Acute and Critical Care Surgery, Duke University Medical Center, Durham, North Carolina, United States of America
| | - George Kasotakis
- Duke University Medical Center, Durham, North Carolina, United States of America
- Department of Surgery, Duke University Medical Center, Durham, North Carolina, United States of America
- Division of Trauma, Acute and Critical Care Surgery, Duke University Medical Center, Durham, North Carolina, United States of America
- * E-mail:
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Lin J, Li G, Xu C, Lu H, Zhang C, Pang Z, Liu Z. Monocyte Chemotactic Protein 1-Induced Protein 1 Is Highly Expressed in Inflammatory Bowel Disease and Negatively Regulates Neutrophil Activities. Mediators Inflamm 2020; 2020:8812020. [PMID: 33488293 PMCID: PMC7803109 DOI: 10.1155/2020/8812020] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2020] [Revised: 11/06/2020] [Accepted: 12/09/2020] [Indexed: 01/12/2023] Open
Abstract
Monocyte chemotactic protein 1-induced protein 1 (MCPIP-1) is highly expressed in activated immune cells and plays an important role in negatively regulating immune responses. However, its role in regulating neutrophil functions in the pathogenesis of inflammatory bowel disease (IBD) is still unclear. Here, we found that MCPIP-1 was markedly increased at both the transcriptional and translational levels in inflamed mucosa of IBD patients compared with healthy controls, which was mainly expressed in neutrophils. Interestingly, MG-132, a proteasome inhibitor reducing the degradation of MCPIP-1, further facilitated neutrophils to express MCPIP-1 in vitro. Importantly, MCPIP-1 markedly downregulated the production of ROS, MPO, and proinflammatory cytokines (e.g., interleukin-1β, interleukin-6, tumor necrosis factor-α, interleukin-8, and interferon-γ) and suppressed the migration of IBD neutrophils. Consistently, the same functional changes were observed in neutrophils from mice with myeloid-targeted overexpression of MCPIP-1 as MG-132 did. Altogether, these findings suggest that MCPIP-1 plays a negative role in regulating neutrophil activities through suppressing the production of ROS, MPO, and proinflammatory cytokines and inhibiting the migration. MG-132 may partially modulate the function of neutrophils via the induction of MCPIP-1. Therefore, targeting MCPIP-1 or exogenous supplementation of MG-132 may provide a therapeutic approach in the treatment of IBD.
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Affiliation(s)
- Jian Lin
- Department of Gastroenterology, The Shanghai Tenth People's Hospital of Tongji University, Shanghai, China
- Department of Gastroenterology, Affiliated Hospital of Putian University, Putian, China
| | - Gengfeng Li
- Department of Gastroenterology, The Shanghai Tenth People's Hospital of Tongji University, Shanghai, China
| | - Chunjin Xu
- Department of Gastroenterology, The First People's Hospital of Shangqiu City Affiliated to Xinxiang Medical University, Shangqiu, China
| | - Huiying Lu
- Department of Gastroenterology, The Shanghai Tenth People's Hospital of Tongji University, Shanghai, China
| | - Cui Zhang
- Department of Gastroenterology, The Shanghai Tenth People's Hospital of Tongji University, Shanghai, China
| | - Zhi Pang
- Department of Gastroenterology, Suzhou Municipal Hospital Affiliated to Nanjing Medical University, Suzhou, China
| | - Zhanju Liu
- Department of Gastroenterology, The Shanghai Tenth People's Hospital of Tongji University, Shanghai, China
- Department of Gastroenterology, The Second Affiliated Hospital of Zhengzhou University, Zhengzhou, China
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Xu R, Li Y, Liu Y, Qu J, Cao W, Zhang E, He J, Cai Z. How are MCPIP1 and cytokines mutually regulated in cancer-related immunity? Protein Cell 2020; 11:881-893. [PMID: 32548715 PMCID: PMC7719135 DOI: 10.1007/s13238-020-00739-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2020] [Accepted: 05/11/2020] [Indexed: 12/21/2022] Open
Abstract
Cytokines are secreted by various cell types and act as critical mediators in many physiological processes, including immune response and tumor progression. Cytokines production is precisely and timely regulated by multiple mechanisms at different levels, ranging from transcriptional to post-transcriptional and posttranslational processes. Monocyte chemoattractant protein-1 induced protein 1 (MCPIP1), a potent immunosuppressive protein, was first described as a transcription factor in monocytes treated with monocyte chemoattractant protein-1 (MCP-1) and subsequently found to possess intrinsic RNase and deubiquitinase activities. MCPIP1 tightly regulates cytokines expression via various functions. Furthermore, cytokines such as interleukin 1 beta (IL-1B) and MCP-1 and inflammatory cytokines inducer lipopolysaccharide (LPS) strongly induce MCPIP1 expression. Mutually regulated MCPIP1 and cytokines form a complicated network in the tumor environment. In this review, we summarize how MCPIP1 and cytokines reciprocally interact and elucidate the effect of the network formed by these components in cancer-related immunity with aim of exploring potential clinical benefits of their mutual regulation.
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Affiliation(s)
- Ruyi Xu
- Bone Marrow Transplantation Center, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, 310006, China
- Institution of Hematology, Zhejiang University, Hangzhou, 310006, China
| | - Yi Li
- Bone Marrow Transplantation Center, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, 310006, China
- Institution of Hematology, Zhejiang University, Hangzhou, 310006, China
| | - Yang Liu
- Bone Marrow Transplantation Center, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, 310006, China
- Institution of Hematology, Zhejiang University, Hangzhou, 310006, China
| | - Jianwei Qu
- Bone Marrow Transplantation Center, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, 310006, China
- Institution of Hematology, Zhejiang University, Hangzhou, 310006, China
| | - Wen Cao
- Bone Marrow Transplantation Center, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, 310006, China
- Institution of Hematology, Zhejiang University, Hangzhou, 310006, China
| | - Enfan Zhang
- Bone Marrow Transplantation Center, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, 310006, China
- Institution of Hematology, Zhejiang University, Hangzhou, 310006, China
| | - Jingsong He
- Bone Marrow Transplantation Center, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, 310006, China.
- Institution of Hematology, Zhejiang University, Hangzhou, 310006, China.
| | - Zhen Cai
- Bone Marrow Transplantation Center, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, 310006, China.
- Institution of Hematology, Zhejiang University, Hangzhou, 310006, China.
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12
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Li T, Zou C. The Role of Deubiquitinating Enzymes in Acute Lung Injury and Acute Respiratory Distress Syndrome. Int J Mol Sci 2020; 21:E4842. [PMID: 32650621 PMCID: PMC7402294 DOI: 10.3390/ijms21144842] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Revised: 07/02/2020] [Accepted: 07/05/2020] [Indexed: 12/11/2022] Open
Abstract
Acute lung injury and acute respiratory distress syndrome (ALI/ARDS) are characterized by an inflammatory response, alveolar edema, and hypoxemia. ARDS occurs most often in the settings of pneumonia, sepsis, aspiration of gastric contents, or severe trauma. The prevalence of ARDS is approximately 10% in patients of intensive care. There is no effective remedy with mortality high at 30-40%. Most functional proteins are dynamic and stringently governed by ubiquitin proteasomal degradation. Protein ubiquitination is reversible, the covalently attached monoubiquitin or polyubiquitin moieties within the targeted protein can be removed by a group of enzymes called deubiquitinating enzymes (DUBs). Deubiquitination plays an important role in the pathobiology of ALI/ARDS as it regulates proteins critical in engagement of the alveolo-capillary barrier and in the inflammatory response. In this review, we provide an overview of how DUBs emerge in pathogen-induced pulmonary inflammation and related aspects in ALI/ARDS. Better understanding of deubiquitination-relatedsignaling may lead to novel therapeutic approaches by targeting specific elements of the deubiquitination pathways.
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Affiliation(s)
| | - Chunbin Zou
- Division of Pulmonary, Allergy, Critical Care Medicine, Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA 15213, USA;
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13
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Metwally H, Tanaka T, Li S, Parajuli G, Kang S, Hanieh H, Hashimoto S, Chalise JP, Gemechu Y, Standley DM, Kishimoto T. Noncanonical STAT1 phosphorylation expands its transcriptional activity into promoting LPS-induced IL-6 and IL-12p40 production. Sci Signal 2020; 13:13/624/eaay0574. [DOI: 10.1126/scisignal.aay0574] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
The lipopolysaccharide (LPS)–induced endocytosis of Toll-like receptor 4 (TLR4) is an essential step in the production of interferon-β (IFN-β), which activates the transcription of antiviral response genes by STAT1 phosphorylated at Tyr701. Here, we showed that STAT1 regulated proinflammatory cytokine production downstream of TLR4 endocytosis independently of IFN-β signaling and the key proinflammatory regulator NF-κB. In human macrophages, TLR4 endocytosis activated a noncanonical phosphorylation of STAT1 at Thr749, which subsequently promoted the production of interleukin-6 (IL-6) and IL-12p40 through distinct mechanisms. STAT1 phosphorylated at Thr749activated the expression of the gene encoding ARID5A, which stabilizesIL6mRNA. Moreover, STAT1 phosphorylated at Thr749directly enhanced transcription of the gene encoding IL-12p40 (IL12B). Instead of affecting STAT1 nuclear translocation, phosphorylation of Thr749facilitated the binding of STAT1 to a noncanonical DNA motif (5′-TTTGANNC-3′) in the promoter regions ofARID5AandIL12B. The endocytosis of TLR4 induced the formation of a complex between the kinases TBK1 and IKKβ, which mediated the phosphorylation of STAT1 at Thr749. Our data suggest that noncanonical phosphorylation in response to LPS confers STAT1 with distinct DNA binding and gene-regulatory properties that promote bothIL12Bexpression andIL6mRNA stabilization. Thus, our study provides a potential mechanism for how TLR4 endocytosis might regulate proinflammatory cytokine production.
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Affiliation(s)
- Hozaifa Metwally
- Laboratory of Immune Regulation, Immunology Frontier Research Center, Osaka University, 565-0871 Osaka, Japan
| | - Toshio Tanaka
- Medical Affairs Bureau, Osaka Prefectural Hospital Organization, Osaka Habikino Medical Center, 583-8588 Osaka, Japan
| | - Songling Li
- Department of Genome Informatics, Research Institute for Microbial Diseases, Osaka University, 565-0871 Osaka, Japan
- Laboratory of Systems Immunology, Immunology Frontier Research Center, Osaka University, 565-0871 Osaka, Japan
| | - Gyanu Parajuli
- Laboratory of Immune Regulation, Immunology Frontier Research Center, Osaka University, 565-0871 Osaka, Japan
| | - Sujin Kang
- Laboratory of Immune Regulation, Immunology Frontier Research Center, Osaka University, 565-0871 Osaka, Japan
| | - Hamza Hanieh
- Department of Medical Analysis, Department of Biological Sciences, Al-Hussein Bin Talal University, 71111 Ma’an, Jordan
| | - Shigeru Hashimoto
- Laboratory of Immune Regulation, Immunology Frontier Research Center, Osaka University, 565-0871 Osaka, Japan
| | - Jaya P. Chalise
- Laboratory of Immune Regulation, Immunology Frontier Research Center, Osaka University, 565-0871 Osaka, Japan
| | - Yohannes Gemechu
- Laboratory of Immune Regulation, Immunology Frontier Research Center, Osaka University, 565-0871 Osaka, Japan
| | - Daron M. Standley
- Department of Genome Informatics, Research Institute for Microbial Diseases, Osaka University, 565-0871 Osaka, Japan
- Laboratory of Systems Immunology, Immunology Frontier Research Center, Osaka University, 565-0871 Osaka, Japan
| | - Tadamitsu Kishimoto
- Laboratory of Immune Regulation, Immunology Frontier Research Center, Osaka University, 565-0871 Osaka, Japan
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14
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Inhibition of transmembrane TNF-α shedding by a specific antibody protects against septic shock. Cell Death Dis 2019; 10:586. [PMID: 31383857 PMCID: PMC6683172 DOI: 10.1038/s41419-019-1808-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2019] [Revised: 07/12/2019] [Accepted: 07/12/2019] [Indexed: 01/21/2023]
Abstract
Transmembrane TNF-α (tmTNF-α) and secretory TNF-α (sTNF-α) display opposite effects in septic shock. Reducing tmTNF-α shedding can offset the detrimental effects of sTNF-α and increase the beneficial effect of tmTNF-α. We previously developed a monoclonal antibody that is specific for tmTNF-α and does not cross-react with sTNF-α. In this study, we show that this antibody can specifically suppress tmTNF-α shedding by competing with a TNF-α converting enzyme that cleaves the tmTNF-α ectodomain to release sTNF-α. This tmTNF-α antibody significantly inhibited LPS-induced secretion of interleukin (IL)-1β, IL-6, interferon-β, and nitric oxide by monocytes/macrophages, and protected mice from septic shock induced by lipopolysaccharide (LPS) or cecal ligation and puncture, while reducing the bacterial load. The mechanism associated with the protective effect of this tmTNF-α antibody involved promotion of LPS-induced toll-like receptor 4 (TLR4) internalization and degradation by recruiting Triad3A to TLR4. Moreover, the tmTNF-α antibody inhibited LPS-induced activation of nuclear factor-κB and interferon regulatory factor 3 pathways by upregulating expression of A20 and monocyte chemotactic protein-induced protein 1. Similarly, treatment of macrophages with exogenous tmTNF-α suppressed LPS/TLR4 signaling and release of proinflammatory cytokines, indicating that increased levels of tmTNF-α promoted by the antibody contributed to its inhibitory effect. Thus, use of this tmTNF-α antibody for specific suppression of tmTNF-α shedding may be a promising strategy to treat septic shock.
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15
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Zhang Y, Huang T, Jiang L, Gao J, Yu D, Ge Y, Lin S. MCP-induced protein 1 attenuates sepsis-induced acute lung injury by modulating macrophage polarization via the JNK/c-Myc pathway. Int Immunopharmacol 2019; 75:105741. [PMID: 31323531 DOI: 10.1016/j.intimp.2019.105741] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2019] [Revised: 06/03/2019] [Accepted: 07/03/2019] [Indexed: 12/17/2022]
Abstract
Sepsis is a potentially fatal systemic inflammatory response syndrome caused by infection. In this study, we evaluated the effects of MCP-induced protein 1 (MCPIP1), a recently discovered inflammation-related ribonuclease, on sepsis-induced acute lung injury (ALI) and investigated the underlying mechanisms. Cecal ligation puncture and lipopolysaccharide induction were performed on Sprague-Dawley rats and RAW264.7 cells, respectively, to establish sepsis-induced ALI models. The proteasome inhibitor MG132 used as an activator of MCPIP1 overexpression, and we showed that MG132 can indeed increase the expression of MCPIP1. MCPIP1 overexpression induced by MG132 alleviated sepsis-induced pathologic changes, water content and protein leakage in the lungs, and induction of systemic inflammatory mediators, and improved the 7-day mortality rate in the model rats. We also showed that MCPIP1 p showed romoted macrophage polarization from the M1 to the M2 type in sepsis-induced ALI. Furthermore, MCPIP1-enhanced M2 polarization was inhibited by an MCPIP1-targeting small interfering RNA (siMCPIP1) in RAW264.7 cells. Further mechanistic studies showed that the promotive effect of MCPIP1 on M2 polarization was related to the inhibition of c-Jun N-terminal kinase (JNK) and its downstream transcription factor c-Myc in the in vitro model. Conversely, siMCPIP1 transfection resulted in the recovery of JNK and c-Myc expression in LPS-treated cells. Taken together, these findings indicate that MCPIP1 plays a protective role in sepsis-induced ALI by modulating macrophage polarization through inhibition of the JNK/c-Myc signaling pathway. Our study presents a potentially novel therapeutic strategy for the treatment of lung injury involving the inflammatory cascade.
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Affiliation(s)
- Yang Zhang
- Department of Anesthesiology, Institute of Anesthesia, Emergency and Critical Care, Subei People's Hospital of Jiangsu Province, XiangYa School of Medicine, Central South University,China
| | - Tianfeng Huang
- Department of Anesthesiology, Institute of Anesthesia, Emergency and Critical Care, Subei People's Hospital of Jiangsu Province, China
| | - Lulu Jiang
- Department of Anesthesiology, Institute of Anesthesia, Emergency and Critical Care, Subei People's Hospital of Jiangsu Province, XiangYa School of Medicine, Central South University,China
| | - Ju Gao
- Department of Anesthesiology, Institute of Anesthesia, Emergency and Critical Care, Subei People's Hospital of Jiangsu Province, China.
| | - Dapeng Yu
- Department of Anesthesiology, Institute of Anesthesia, Emergency and Critical Care, Subei People's Hospital of Jiangsu Province, XiangYa School of Medicine, Central South University,China
| | - Yali Ge
- Department of Anesthesiology, Institute of Anesthesia, Emergency and Critical Care, Subei People's Hospital of Jiangsu Province, XiangYa School of Medicine, Central South University,China
| | - Shunyan Lin
- Department of Anesthesiology, Institute of Anesthesia, Emergency and Critical Care, Subei People's Hospital of Jiangsu Province, China
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16
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Shu S, Zhang Y, Li W, Wang L, Wu Y, Yuan Z, Zhou J. The role of monocyte chemotactic protein-induced protein 1 (MCPIP1) in angiotensin II-induced macrophage apoptosis and vulnerable plaque formation. Biochem Biophys Res Commun 2019; 515:378-385. [PMID: 31155290 DOI: 10.1016/j.bbrc.2019.05.145] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2019] [Accepted: 05/23/2019] [Indexed: 11/19/2022]
Abstract
Atherosclerotic plaque rupture is the main cause of acute coronary syndrome (ACS). Angiotensin II (Ang II) and macrophage apoptosis are involved in the pathogenesis of atherosclerosis. However, the underlying mechanisms remain unclear. We aimed to address the role of monocyte chemotactic protein-induced protein 1 (MCPIP1) in Ang II-induced macrophage apoptosis and vulnerable plaque formation. In mouse peritoneal macrophages, Ang II promoted endoplasmic reticulum (ER) stress-dependent macrophage apoptosis. Ang II markedly upregulated the expression of MCPIP1 via activating p38 mitogen-activated protein kinase (p38 MAPK). Treatment with MCPIP1 shRNA downregulated ER stress-related proteins and decreased macrophage apoptosis induced by Ang II. Ang II also activated the AMP-activated protein kinase (AMPK) signaling in macrophages. Inhibition of AMPK reduced macrophage apoptosis by inhibiting the p38 MAPK/MCPIP1/ER stress pathway. Furthermore, blocking the Ang II type 1 receptor (AT1R) with losartan effectively inhibited Ang II-induced macrophage apoptosis and AMPK/p38 MAPK/MCPIP1/ER pathway activation. In the atherosclerotic vulnerable plaque model in mice, losartan inhibited the progression of atherosclerosis and transformed vulnerable plaque into a more stable phenotype. Moreover, losartan markedly decreased the number of CD68+TUNEL+, CD68+MCPIP1+, CD68+p-eIF2α+ and CD68+CHOP+ cells in the lesion area. Taken together, Ang II promotes macrophage apoptosis via the AMPK/p38 MAPK/MCPIP1/ER stress pathway in macrophages via its receptor AT1R, which may contribute to vulnerable plaque formation. Our study clarifies a novel regulatory role of MCPIP1 in Ang II-induced macrophage apoptosis and plaque instability, providing a potential therapeutic target for prevention of ACS.
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MESH Headings
- AMP-Activated Protein Kinases/metabolism
- Angiotensin II/physiology
- Angiotensin II Type 1 Receptor Blockers/pharmacology
- Animals
- Apoptosis/drug effects
- Apoptosis/physiology
- Disease Models, Animal
- Endoplasmic Reticulum Stress
- Losartan/pharmacology
- MAP Kinase Signaling System
- Macrophages, Peritoneal/pathology
- Macrophages, Peritoneal/physiology
- Male
- Mice
- Mice, Inbred C57BL
- Mice, Knockout, ApoE
- Plaque, Atherosclerotic/etiology
- Plaque, Atherosclerotic/pathology
- Plaque, Atherosclerotic/physiopathology
- RAW 264.7 Cells
- RNA, Small Interfering/genetics
- Receptor, Angiotensin, Type 1/metabolism
- Ribonucleases/antagonists & inhibitors
- Ribonucleases/genetics
- Ribonucleases/physiology
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Affiliation(s)
- Shan Shu
- Department of Cardiovascular Medicine, First Affiliated Hospital of Medical School, Xi'an Jiaotong University, Xi'an, 710061, Shaanxi, China
| | - Yan Zhang
- Department of Cardiovascular Medicine, First Affiliated Hospital of Medical School, Xi'an Jiaotong University, Xi'an, 710061, Shaanxi, China
| | - Wenyuan Li
- Department of Cardiovascular Medicine, First Affiliated Hospital of Medical School, Xi'an Jiaotong University, Xi'an, 710061, Shaanxi, China
| | - Lijun Wang
- Department of Cardiovascular Medicine, First Affiliated Hospital of Medical School, Xi'an Jiaotong University, Xi'an, 710061, Shaanxi, China
| | - Yue Wu
- Department of Cardiovascular Medicine, First Affiliated Hospital of Medical School, Xi'an Jiaotong University, Xi'an, 710061, Shaanxi, China
| | - Zuyi Yuan
- Department of Cardiovascular Medicine, First Affiliated Hospital of Medical School, Xi'an Jiaotong University, Xi'an, 710061, Shaanxi, China; Key Laboratory of Environment and Genes Related to Diseases (Xi'an Jiaotong University), Ministry of Education, Xi'an, 710061, Shaanxi, China.
| | - Juan Zhou
- Department of Cardiovascular Medicine, First Affiliated Hospital of Medical School, Xi'an Jiaotong University, Xi'an, 710061, Shaanxi, China; Key Laboratory of Molecular Cardiology of Shannxi Province, Xi'an, 710061, Shaanxi, China.
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17
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Han S, Li Z, Ji P, Jia Y, Bai X, Cai W, Li X, Yang C, Yang Y, Yang K, Wu G, Zhang W, Hu D. MCPIP1 alleviated lipopolysaccharide‐induced liver injury by regulating SIRT1 via modulation of microRNA‐9. J Cell Physiol 2019; 234:22450-22462. [PMID: 31099043 DOI: 10.1002/jcp.28809] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2019] [Revised: 04/22/2019] [Accepted: 04/24/2019] [Indexed: 12/20/2022]
Affiliation(s)
- Shichao Han
- Department of Burns and Cutaneous Surgery Xijing Hospital, Air Force Medical University Xi'an Shaanxi China
| | - Zhenzhen Li
- Department of Burns and Cutaneous Surgery Xijing Hospital, Air Force Medical University Xi'an Shaanxi China
| | - Peng Ji
- Department of Burns and Cutaneous Surgery Xijing Hospital, Air Force Medical University Xi'an Shaanxi China
| | - Yanhui Jia
- Department of Burns and Cutaneous Surgery Xijing Hospital, Air Force Medical University Xi'an Shaanxi China
| | - Xiaozhi Bai
- Department of Burns and Cutaneous Surgery Xijing Hospital, Air Force Medical University Xi'an Shaanxi China
| | - Weixia Cai
- Department of Burns and Cutaneous Surgery Xijing Hospital, Air Force Medical University Xi'an Shaanxi China
| | - Xiaoqiang Li
- Department of Burns and Cutaneous Surgery Xijing Hospital, Air Force Medical University Xi'an Shaanxi China
| | - Chen Yang
- Department of Burns and Cutaneous Surgery Xijing Hospital, Air Force Medical University Xi'an Shaanxi China
| | - Yunshu Yang
- Department of Burns and Cutaneous Surgery Xijing Hospital, Air Force Medical University Xi'an Shaanxi China
| | - Kuan Yang
- Department of Plastic Surgery Xijing Hospital, Air Force Medical University Xi'an Shaanxi China
| | - Gaofeng Wu
- Department of Burns and Cutaneous Surgery Xijing Hospital, Air Force Medical University Xi'an Shaanxi China
| | - Wanfu Zhang
- Department of Burns and Cutaneous Surgery Xijing Hospital, Air Force Medical University Xi'an Shaanxi China
| | - Dahai Hu
- Department of Burns and Cutaneous Surgery Xijing Hospital, Air Force Medical University Xi'an Shaanxi China
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18
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Central role of myeloid MCPIP1 in protecting against LPS-induced inflammation and lung injury. Signal Transduct Target Ther 2017; 2:17066. [PMID: 29263935 PMCID: PMC5721545 DOI: 10.1038/sigtrans.2017.66] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2017] [Revised: 09/21/2017] [Accepted: 10/29/2017] [Indexed: 12/27/2022] Open
Abstract
Although systemic inflammatory responses attributable to infection may lead to significant lung injury, the precise molecular mechanisms leading to lung damage are poorly understood and therapeutic options remain limited. Here, we show that myeloid monocyte chemotactic protein-inducible protein 1 (MCPIP1) plays a central role in protecting against LPS-induced inflammation and lung injury. Myeloid-specific MCPIP1 knockout mice developed spontaneous inflammatory syndromes, but at a late age compared to global MCPIP1 knockout mice. Moreover, mice with a myeloid-specific deletion of MCPIP1 were extremely sensitive to LPS-induced lung injury due to overproduction of proinflammatory cytokines and chemokines. We identified C/EBPβ and C/EBPδ, two critical transcriptional factors that drive cytokine production and lung injury, as targets of MCPIP1 RNase. LPS administration caused MCPIP1 protein degradation in the lungs. Pharmacological inhibition of MALT1, a paracaspase that cleaves MCPIP1, by MI-2 selectively increased the MCPIP1 protein levels in macrophages and in the lungs. Meanwhile, administration of MI-2 protected mice from LPS-induced inflammation, lung injury and death. Collectively, these results indicate that myeloid MCPIP1 is central in controlling LPS-induced inflammation and lung injury. Pharmacological inhibition of MALT1 protease activity may be a good strategy to treat inflammatory diseases by enhancing MCPIP1 expression in myeloid cells.
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19
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Peng H, Ning H, Wang Q, Lu W, Chang Y, Wang TT, Lai J, Kolattukudy PE, Hou R, Hoft DF, Dykewicz MS, Liu J. Monocyte chemotactic protein-induced protein 1 controls allergic airway inflammation by suppressing IL-5-producing T H2 cells through the Notch/Gata3 pathway. J Allergy Clin Immunol 2017; 142:582-594.e10. [PMID: 29111212 DOI: 10.1016/j.jaci.2017.09.031] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2016] [Revised: 09/10/2017] [Accepted: 09/24/2017] [Indexed: 02/08/2023]
Abstract
BACKGROUND Asthmatic and allergic inflammation is mediated by TH2 cytokines (IL-4, IL-5, and IL-13). Although we have learned much about how TH2 cells are differentiated, the TH2 checkpoint mechanisms remain elusive. OBJECTIVES In this study we investigate how monocyte chemotactic protein-induced protein 1 (MCPIP1; encoded by the Zc3h12a gene) regulates IL-5-producing TH2 cell differentiation and TH2-mediated inflammation. METHODS The functions of Zc3h12a-/- CD4 T cells were evaluated by checking the expression of TH2 cytokines and transcription factors in vivo and in vitro. Allergic airway inflammation of Zc3h12a-/- mice was examined with murine asthma models. In addition, antigen-specific CD4 T cells deficient in MCPIP1 were transferred to wild-type recipient mice, challenged with ovalbumin (OVA) or house dust mite (HDM), and accessed for TH2 inflammation. RESULTS Zc3h12a-/- mice have spontaneous severe lung inflammation, with an increase in mainly IL-5- and IL-13-producing but not IL-4-producing TH2 cells in the lung. Mechanistically, differentiation of IL-5-producing Zc3h12a-/- TH2 cells is mediated through Notch signaling and Gata3 independent of IL-4. Gata3 mRNA is stabilized in Zc3h12a-/- TH2 cells. MCPIP1 promotes Gata3 mRNA decay through the RNase domain. Furthermore, deletion of MCPIP1 in OVA- or HDM-specific T cells leads to significantly increased TH2-mediated airway inflammation in OVA or HDM murine models of asthma. CONCLUSIONS Our study reveals that MCPIP1 regulates the development and function of IL-5-producing TH2 cells through the Notch/Gata3 pathway. MCPIP1 represents a new and promising target for the treatment of asthma and other TH2-mediated diseases.
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Affiliation(s)
- Hui Peng
- Division of Infectious Diseases, Allergy and Immunology, Department of Internal Medicine, Saint Louis University School of Medicine, St Louis, Mo
| | - Huan Ning
- Division of Infectious Diseases, Allergy and Immunology, Department of Internal Medicine, Saint Louis University School of Medicine, St Louis, Mo
| | - Qinghong Wang
- Division of Infectious Diseases, Allergy and Immunology, Department of Internal Medicine, Saint Louis University School of Medicine, St Louis, Mo
| | - Wenbao Lu
- Division of Infectious Diseases, Allergy and Immunology, Department of Internal Medicine, Saint Louis University School of Medicine, St Louis, Mo
| | - Yingzi Chang
- Pharmacology Department, A.T. Still University, Kirksville, Mo
| | | | - Jinping Lai
- Department of Pathology, Saint Louis University School of Medicine, Saint Louis University School of Medicine, St Louis, Mo
| | - Pappachan E Kolattukudy
- Burnett School of Biomedical Sciences, College of Medicine, University of Central Florida, Orlando, Fla
| | - Rong Hou
- Division of Infectious Diseases, Allergy and Immunology, Department of Internal Medicine, Saint Louis University School of Medicine, St Louis, Mo
| | - Daniel F Hoft
- Division of Infectious Diseases, Allergy and Immunology, Department of Internal Medicine, Saint Louis University School of Medicine, St Louis, Mo
| | - Mark S Dykewicz
- Division of Infectious Diseases, Allergy and Immunology, Department of Internal Medicine, Saint Louis University School of Medicine, St Louis, Mo
| | - Jianguo Liu
- Division of Infectious Diseases, Allergy and Immunology, Department of Internal Medicine, Saint Louis University School of Medicine, St Louis, Mo.
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20
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Mao R, Yang R, Chen X, Harhaj EW, Wang X, Fan Y. Regnase-1, a rapid response ribonuclease regulating inflammation and stress responses. Cell Mol Immunol 2017; 14:412-422. [PMID: 28194024 PMCID: PMC5423090 DOI: 10.1038/cmi.2016.70] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2016] [Revised: 11/17/2016] [Accepted: 11/17/2016] [Indexed: 02/07/2023] Open
Abstract
RNA-binding proteins (RBPs) are central players in post-transcriptional regulation and immune homeostasis. The ribonuclease and RBP Regnase-1 exerts critical roles in both immune cells and non-immune cells. Its expression is rapidly induced under diverse conditions including microbial infections, treatment with inflammatory cytokines and chemical or mechanical stimulation. Regnase-1 activation is transient and is subject to negative feedback mechanisms including proteasome-mediated degradation or mucosa-associated lymphoid tissue 1 (MALT1) mediated cleavage. The major function of Regnase-1 is promoting mRNA decay via its ribonuclease activity by specifically targeting a subset of genes in different cell types. In monocytes, Regnase-1 downregulates IL-6 and IL-12B mRNAs, thus mitigating inflammation, whereas in T cells, it restricts T-cell activation by targeting c-Rel, Ox40 and Il-2 transcripts. In cancer cells, Regnase-1 promotes apoptosis by inhibiting anti-apoptotic genes including Bcl2L1, Bcl2A1, RelB and Bcl3. Together with up-frameshift protein-1 (UPF1), Regnase-1 specifically cleaves mRNAs that are active during translation by recognizing a stem-loop (SL) structure within the 3'UTRs of these genes in endoplasmic reticulum-bound ribosomes. Through this mechanism, Regnase-1 rapidly shapes mRNA profiles and associated protein expression, restricts inflammation and maintains immune homeostasis. Dysregulation of Regnase-1 has been described in a multitude of pathological states including autoimmune diseases, cancer and cardiovascular diseases. Here, we provide a comprehensive update on the function, regulation and molecular mechanisms of Regnase-1, and we propose that Regnase-1 may function as a master rapid response gene for cellular adaption triggered by microenvironmental changes.
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Affiliation(s)
- Renfang Mao
- Basic Medical Research Center, School of Medicine, Nantong University, Nantong, Jiangsu 226001, People's Republic of China
| | - Riyun Yang
- Basic Medical Research Center, School of Medicine, Nantong University, Nantong, Jiangsu 226001, People's Republic of China
| | - Xia Chen
- Basic Medical Research Center, School of Medicine, Nantong University, Nantong, Jiangsu 226001, People's Republic of China
| | - Edward W Harhaj
- Department of Oncology, Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins School of Medicine, Baltimore, MD 21287, USA
| | - Xiaoying Wang
- Department of Immunology, School of Medicine, Nantong University, Nantong, Jiangsu 226001, People's Republic of China
| | - Yihui Fan
- Basic Medical Research Center, School of Medicine, Nantong University, Nantong, Jiangsu 226001, People's Republic of China
- Department of Immunology, School of Medicine, Nantong University, Nantong, Jiangsu 226001, People's Republic of China
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21
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Abstract
Nearly 60 CCCH zinc finger proteins have been identified in humans and mice. These proteins are involved in the regulation of multiple steps of RNA metabolism, including mRNA splicing, polyadenylation, transportation, translation and decay. Several CCCH zinc finger proteins, such as tristetraprolin (TTP), roquin 1 and MCPIP1 (also known as regnase 1), are crucial for many aspects of immune regulation by targeting mRNAs for degradation and modulation of signalling pathways. In this Review, we focus on the emerging roles of CCCH zinc finger proteins in the regulation of immune responses through their effects on cytokine production, immune cell activation and immune homeostasis.
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Tim-4 protects mice against lipopolysaccharide-induced endotoxic shock by suppressing the NF-κB signaling pathway. J Transl Med 2016; 96:1189-1197. [PMID: 27617399 DOI: 10.1038/labinvest.2016.94] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2016] [Revised: 07/08/2016] [Accepted: 07/27/2016] [Indexed: 12/16/2022] Open
Abstract
Endotoxic shock is the primary cause of morbidity and mortality in hospital patients, creating an urgent need to explore the mechanisms involved in sepsis. Our previous studies showed that T-cell immunoglobulin- and mucin-domain-containing molecule-4 (Tim-4) attenuated the inflammatory response through regulating the functions of macrophages. However, the mechanism by which Tim-4 does this has not been fully elucidated. In this study, we found that Tim-4 expression was increased in lipopolysaccharide (LPS)-induced endotoxic shock. Interestingly, the survival rate of mice in the Tim-4 overexpression group was higher than that of the control group after LPS administration. To investigate the function of Tim-4 in LPS-induced inflammation, we further demonstrated that Tim-4 attenuated LPS-induced endotoxic shock by inhibiting cytokine production by macrophages. Blocking expression of Tim-4 and nuclear factor-kappa B (NF-κB) signal inhibition showed that Tim-4 inhibited cytokine production via NF-κB signaling pathway. This study indicates that Tim-4 may exert its immune modulation by regulating inflammatory factor secretion and might act as a novel potential target for inflammatory diseases, especially endotoxic shock.
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Liu XX, Wang C, Huang SF, Chen Q, Hu YF, Zhou L, Gu Y. Regnase-1 in microglia negatively regulates high mobility group box 1-mediated inflammation and neuronal injury. Sci Rep 2016; 6:24073. [PMID: 27044405 PMCID: PMC4820713 DOI: 10.1038/srep24073] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2015] [Accepted: 03/18/2016] [Indexed: 01/04/2023] Open
Abstract
Extracellular high mobility group box 1 (HMGB1) has been demonstrated to function as a proinflammatory cytokine and induces neuronal injury in response to various pathological stimuli in central nervous system (CNS). However, the regulatory factor involved in HMGB1-mediated inflammatory signaling is largely unclear. Regulatory RNase 1 (Regnase-1) is a potent anti-inflammation enzyme that can degrade a set of mRNAs encoding proinflammatory cytokines. The present study aims to determine the role of Regnase-1 in the regulation of HMGB1-mediated inflammatory injury in CNS. Cultured microglia and rat brain were treated with recombinant HMGB1 to examine the induction of Regnase-1 expression. Moreover, the role of Regnase-1 in modulating the expression of inflammatory cytokines and neuronal injury was then investigated in microglia by specific siRNA knockdown upon HMGB1 treatment. Results showed that HMGB1 could significantly induce the de novo synthesis of Regnase-1 in cultured microglia. Consistently, Regnase-1 was elevated and found to be co-localized with microglia marker in the brain of rat treated with HMGB1. Silencing Regnase-1 in microglia enhanced HMGB1-induced expression of proinflammatory cytokines and exacerbated neuronal toxicity. Collectively, these results suggest that Regnase-1 can be induced by HMGB1 in microglia and negatively regulates HMGB1-mediated neuroinflammation and neuronal toxicity.
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Affiliation(s)
- Xiao-Xi Liu
- Department of Neurology, Nanfang Hospital, Southern Medical University. Guangzhou, Guangdong 510515, P. R. China
| | - Chen Wang
- Department of Neurology, Nanfang Hospital, Southern Medical University. Guangzhou, Guangdong 510515, P. R. China.,Department of Neurology, the Second Affiliated Hospital &Yuying Children's Hospital, Wenzhou Medical University. Wenzhou, Zhejiang 325000, P. R. China
| | - Shao-Fei Huang
- Department of Neurology, Nanfang Hospital, Southern Medical University. Guangzhou, Guangdong 510515, P. R. China
| | - Qiong Chen
- Department of Neurology, Nanfang Hospital, Southern Medical University. Guangzhou, Guangdong 510515, P. R. China
| | - Ya-Fang Hu
- Department of Neurology, Nanfang Hospital, Southern Medical University. Guangzhou, Guangdong 510515, P. R. China
| | - Liang Zhou
- Department of Neurology, Nanfang Hospital, Southern Medical University. Guangzhou, Guangdong 510515, P. R. China
| | - Yong Gu
- Department of Neurology, Nanfang Hospital, Southern Medical University. Guangzhou, Guangdong 510515, P. R. China
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Blázquez R, Sánchez-Margallo FM, Álvarez V, Usón A, Casado JG. Surgical meshes coated with mesenchymal stem cells provide an anti-inflammatory environment by a M2 macrophage polarization. Acta Biomater 2016; 31:221-230. [PMID: 26654766 DOI: 10.1016/j.actbio.2015.11.057] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2015] [Revised: 10/15/2015] [Accepted: 11/28/2015] [Indexed: 12/20/2022]
Abstract
Surgical meshes are widely used in clinics to reinforce soft tissue's defects, and to give support to prolapsed organs. However, the implantation of surgical meshes is commonly related with an inflammatory response being difficult to eradicate without removing the mesh. Here we hypothesize that the combined use of surgical meshes and mesenchymal stem cells (MSCs) could be a useful tool to reduce the inflammatory reaction secondary to mesh implantation. In vitro determinations of viability, metabolic activity and immunomodulation assays were performed on MSCs-coated meshes. Magnetic resonance imaging, evaluation by laparoscopic optical system and histology were performed for safety assessment. Finally, flow cytometry and qRT-PCR were used to elucidate the mechanism of action of MSCs-coated meshes. Our results demonstrate the feasibility to obtain MSCs-coated surgical meshes and their cryopreservability to be used as an 'off the shelf' product. These biological meshes fulfill the safety aspects as non-adverse effects were observed when compared to controls. Moreover, both in vitro and in vivo studies demonstrated that, local immunomodulation of implanted meshes is mediated by a macrophage polarization towards an anti-inflammatory phenotype. In conclusion, the combined usage of surgical meshes with MSCs fulfills the safety requirements for a future clinical application, providing an anti-inflammatory environment that could reduce the inflammatory processes commonly observed after surgical mesh implantation. STATEMENT OF SIGNIFICANCE Surgical meshes are medical devices widely used in clinics to resolve hernias and organs' prolapses, among other disorders. However, the implantation of surgical meshes is commonly related with an inflammatory response being difficult to eradicate without removing the mesh, causing pain and discomfort in the patient. Previously, the anti-inflammatory, immunomodulatory and pro-regenerative ability of mesenchymal stem cells (MSCs) have been described. To our knowledge, this is the first report where the anti-inflammatory and pro-regenerative ability of MSCs have been successfully applied in combination with surgical meshes, reducing the inflammatory processes commonly observed after mesh implantation. Moreover, our in vitro and in vivo results highlight the safety and efficacy of these bioactive meshes as a 'ready to use' medical product.
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Affiliation(s)
- Rebeca Blázquez
- Stem Cell Therapy Unit, 'Jesús Usón' Minimally Invasive Surgery Centre, Cáceres 10071, Spain
| | | | - Verónica Álvarez
- Stem Cell Therapy Unit, 'Jesús Usón' Minimally Invasive Surgery Centre, Cáceres 10071, Spain
| | - Alejandra Usón
- Stem Cell Therapy Unit, 'Jesús Usón' Minimally Invasive Surgery Centre, Cáceres 10071, Spain
| | - Javier G Casado
- Stem Cell Therapy Unit, 'Jesús Usón' Minimally Invasive Surgery Centre, Cáceres 10071, Spain.
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25
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Lu W, Ning H, Gu L, Peng H, Wang Q, Hou R, Fu M, Hoft DF, Liu J. MCPIP1 Selectively Destabilizes Transcripts Associated with an Antiapoptotic Gene Expression Program in Breast Cancer Cells That Can Elicit Complete Tumor Regression. Cancer Res 2016; 76:1429-40. [PMID: 26833120 DOI: 10.1158/0008-5472.can-15-1115] [Citation(s) in RCA: 69] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2015] [Accepted: 11/05/2015] [Indexed: 01/14/2023]
Abstract
The ability of cancer cells to evade apoptosis is dictated by a shift in the balance between proapoptotic and antiapoptotic gene expression programs. Monocyte chemotactic protein-induced protein 1 (MCPIP1) is a zinc-finger RNA binding protein with important roles in mediating inflammatory responses. Overexpression of MCPIP1 in different cancer cell types has been implicated in eliciting an antitumor response, but a direct role of MCPIP1 in apoptosis has not been established. In this study, we demonstrate that MCPIP1 functions as a potent tumor suppressor that induces apoptosis of breast tumor cells by selectively enhancing mRNA decay of antiapoptotic gene transcripts, including Bcl2L1, Bcl2A1, RelB, Birc3, and Bcl3. Mechanistically, MCPIP1 physically interacted with a stem-loop structure in the 3' untranslated region of these transcripts through its PIN domain, causing mRNA destabilization. Furthermore, we found that MCPIP1 expression was repressed in breast tumor cells, and overexpression of MCPIP1 induced apoptosis, whereas its depletion enhanced cancer cell proliferation. Moreover, MCPIP1 induction in vivo resulted in complete regression of established tumors and a significant reduction in metastatic disease. Notably, low MCPIP1 expression in tumor samples from breast cancer patients was strongly associated with poor survival over 13 years of follow-up. Collectively, our results highlight that MCPIP1 is a new tumor suppressor in breast cancer that induces cell death by tipping the balance in favor of proapoptotic gene expression.
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Affiliation(s)
- Wenbao Lu
- Division of Infectious Diseases, Allergy and Immunology, Department of Internal Medicine, Saint Louis University School of Medicine, Saint Louis University, St. Louis, Missouri
| | - Huan Ning
- Division of Infectious Diseases, Allergy and Immunology, Department of Internal Medicine, Saint Louis University School of Medicine, Saint Louis University, St. Louis, Missouri
| | - Ling Gu
- Division of Infectious Diseases, Allergy and Immunology, Department of Internal Medicine, Saint Louis University School of Medicine, Saint Louis University, St. Louis, Missouri
| | - Hui Peng
- Division of Infectious Diseases, Allergy and Immunology, Department of Internal Medicine, Saint Louis University School of Medicine, Saint Louis University, St. Louis, Missouri
| | - Qinghong Wang
- Division of Infectious Diseases, Allergy and Immunology, Department of Internal Medicine, Saint Louis University School of Medicine, Saint Louis University, St. Louis, Missouri
| | - Rong Hou
- Division of Infectious Diseases, Allergy and Immunology, Department of Internal Medicine, Saint Louis University School of Medicine, Saint Louis University, St. Louis, Missouri
| | - Mingui Fu
- Shock/Trauma Research Center and Department of Basic Medical Science, School of Medicine, University of Missouri-Kansas City, Kansas City, Missouri
| | - Daniel F Hoft
- Division of Infectious Diseases, Allergy and Immunology, Department of Internal Medicine, Saint Louis University School of Medicine, Saint Louis University, St. Louis, Missouri
| | - Jianguo Liu
- Division of Infectious Diseases, Allergy and Immunology, Department of Internal Medicine, Saint Louis University School of Medicine, Saint Louis University, St. Louis, Missouri.
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26
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MCPIP1 Regulates Fibroblast Migration in 3-D Collagen Matrices Downstream of MAP Kinases and NF-κB. J Invest Dermatol 2015; 135:2944-2954. [PMID: 26399696 PMCID: PMC4648714 DOI: 10.1038/jid.2015.334] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2015] [Revised: 07/27/2015] [Accepted: 08/03/2015] [Indexed: 12/13/2022]
Abstract
The fibroblast-populated 3D collagen matrix has been used to model matrix contraction, cell motility, and general fibroblast biology. MCPIP1 (monocyte chemotactic protein-induced protein 1) has been shown to regulate inflammation, angiogenesis, and cellular motility. In the present study, we demonstrated induction of MCPIP1 in human fibroblasts embedded in the stress-released 3D collagen matrix, which occurred through activation of mitogen-activated protein kinases, phosphoinositide 3-kinase, and NF-κB. Furthermore, MCPIP1 induction was associated with inhibition of fibroblast migration out of the nested collagen matrix. MCPIP1 induction or ectopic expression also upregulated p53. RNA interference of p53 prevented the inhibition of migration produced by induction or ectopic expression of MCPIP1. Our findings suggest a new role for MCPIP1 as a molecular switch that regulates fibroblast migration in the nested collagen matrix model.
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27
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Garg AV, Amatya N, Chen K, Cruz JA, Grover P, Whibley N, Conti HR, Hernandez Mir G, Sirakova T, Childs EC, Smithgall TE, Biswas PS, Kolls JK, McGeachy MJ, Kolattukudy PE, Gaffen SL. MCPIP1 Endoribonuclease Activity Negatively Regulates Interleukin-17-Mediated Signaling and Inflammation. Immunity 2015; 43:475-87. [PMID: 26320658 DOI: 10.1016/j.immuni.2015.07.021] [Citation(s) in RCA: 107] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2014] [Revised: 05/31/2015] [Accepted: 06/16/2015] [Indexed: 01/13/2023]
Abstract
Interleukin-17 (IL-17) induces pathology in autoimmunity and infections; therefore, constraint of this pathway is an essential component of its regulation. We demonstrate that the signaling intermediate MCPIP1 (also termed Regnase-1, encoded by Zc3h12a) is a feedback inhibitor of IL-17 receptor signal transduction. MCPIP1 knockdown enhanced IL-17-mediated signaling, requiring MCPIP1's endoribonuclease but not deubiquitinase domain. MCPIP1 haploinsufficient mice showed enhanced resistance to disseminated Candida albicans infection, which was reversed in an Il17ra(-/-) background. Conversely, IL-17-dependent pathology in Zc3h12a(+/-) mice was exacerbated in both EAE and pulmonary inflammation. MCPIP1 degraded Il6 mRNA directly but only modestly downregulated the IL-6 promoter. However, MCPIP1 strongly inhibited the Lcn2 promoter by regulating the mRNA stability of Nfkbiz, encoding the IκBζ transcription factor. Unexpectedly, MCPIP1 degraded Il17ra and Il17rc mRNA, independently of the 3' UTR. The cumulative impact of MCPIP1 on IL-6, IκBζ, and possibly IL-17R subunits results in a biologically relevant inhibition of IL-17 signaling.
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Affiliation(s)
- Abhishek V Garg
- Division of Rheumatology & Clinical Immunology, University of Pittsburgh, Pittsburgh, PA 15261, USA
| | - Nilesh Amatya
- Division of Rheumatology & Clinical Immunology, University of Pittsburgh, Pittsburgh, PA 15261, USA
| | - Kong Chen
- Department of Pediatrics & Immunology, Richard King Mellon Institute for Pediatric Research, University of Pittsburgh School of Medicine, Pittsburgh, PA 15224, USA
| | - J Agustin Cruz
- Division of Rheumatology & Clinical Immunology, University of Pittsburgh, Pittsburgh, PA 15261, USA
| | - Prerna Grover
- Department of Microbiology & Molecular Genetics, University of Pittsburgh, Pittsburgh, PA 15261, USA
| | - Natasha Whibley
- Division of Rheumatology & Clinical Immunology, University of Pittsburgh, Pittsburgh, PA 15261, USA
| | - Heather R Conti
- Division of Rheumatology & Clinical Immunology, University of Pittsburgh, Pittsburgh, PA 15261, USA
| | - Gerard Hernandez Mir
- Division of Rheumatology & Clinical Immunology, University of Pittsburgh, Pittsburgh, PA 15261, USA
| | - Tatiana Sirakova
- Burnett School of Biomedical Sciences, College of Medicine, University of Central Florida, Orlando, FL 32816, USA
| | - Erin C Childs
- Division of Rheumatology & Clinical Immunology, University of Pittsburgh, Pittsburgh, PA 15261, USA
| | - Thomas E Smithgall
- Department of Microbiology & Molecular Genetics, University of Pittsburgh, Pittsburgh, PA 15261, USA
| | - Partha S Biswas
- Division of Rheumatology & Clinical Immunology, University of Pittsburgh, Pittsburgh, PA 15261, USA
| | - Jay K Kolls
- Department of Pediatrics & Immunology, Richard King Mellon Institute for Pediatric Research, University of Pittsburgh School of Medicine, Pittsburgh, PA 15224, USA
| | - Mandy J McGeachy
- Division of Rheumatology & Clinical Immunology, University of Pittsburgh, Pittsburgh, PA 15261, USA
| | - Pappachan E Kolattukudy
- Department of Microbiology & Molecular Genetics, University of Pittsburgh, Pittsburgh, PA 15261, USA
| | - Sarah L Gaffen
- Division of Rheumatology & Clinical Immunology, University of Pittsburgh, Pittsburgh, PA 15261, USA.
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Huang S, Liu S, Fu JJ, Tony Wang T, Yao X, Kumar A, Liu G, Fu M. Monocyte Chemotactic Protein-induced Protein 1 and 4 Form a Complex but Act Independently in Regulation of Interleukin-6 mRNA Degradation. J Biol Chem 2015; 290:20782-20792. [PMID: 26134560 DOI: 10.1074/jbc.m114.635870] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2014] [Indexed: 01/07/2023] Open
Abstract
It was recently demonstrated that MCPIP1 is a critical factor that controls inflammation and immune homeostasis; however, the relationship between MCPIP1 and other members of this protein family is largely unknown. Here, we report that MCPIP1 interacts with MCPIP4 to form a protein complex, but acts independently in the regulation of IL-6 mRNA degradation. In an effort to identify MCPIP1-interacting proteins by co-immunoprecipitation (Co-IP) and mass-spec analysis, MCPIP4 was identified as a MCPIP1-interacting protein, which was further confirmed by Co-IP and mammalian two-hybrid assay. Immunofluorescence staining showed that MCPIP4 was co-localized with MCPIP1 in the GW-body, which features GW182 and Argonaute 2. Further studies showed that MCPIP1 and MCPIP4 act independently in regulation of IL-6 mRNA degradation. These results suggest that MCPIP1 and MCPIP4 may additively contribute to control IL-6 production in vivo.
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Affiliation(s)
- Shengping Huang
- Shock/Trauma Research Center & Department of Basic Medical Science, School of Medicine, University of Missouri Kansas City, Kansas City, Missouri 64108
| | - Shufeng Liu
- Bioscience Division, SRI International, Harrisonburg, Virginia 22802
| | - Jia J Fu
- Shock/Trauma Research Center & Department of Basic Medical Science, School of Medicine, University of Missouri Kansas City, Kansas City, Missouri 64108
| | - T Tony Wang
- Bioscience Division, SRI International, Harrisonburg, Virginia 22802
| | - Xiaolan Yao
- Division of Molecular Biology and Biochemistry, School of Biological Science, University of Missouri Kansas City, Kansas City, Missouri 64110
| | - Anil Kumar
- Division of Pharmacology and Toxicology, School of Pharmacy, University of Missouri Kansas City, Kansas City, Missouri 64108
| | - Gang Liu
- Division of Pulmonary, Allergy, and Critical Care Medicine, University of Alabama at Birmingham, School of Medicine, Birmingham, Alabama 35294
| | - Mingui Fu
- Shock/Trauma Research Center & Department of Basic Medical Science, School of Medicine, University of Missouri Kansas City, Kansas City, Missouri 64108.
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29
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Kanwal Z, Wiegertjes GF, Veneman WJ, Meijer AH, Spaink HP. Comparative studies of Toll-like receptor signalling using zebrafish. DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 2014; 46:35-52. [PMID: 24560981 DOI: 10.1016/j.dci.2014.02.003] [Citation(s) in RCA: 64] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2013] [Revised: 02/04/2014] [Accepted: 02/06/2014] [Indexed: 06/03/2023]
Abstract
Zebrafish model systems for infectious disease are increasingly used for the functional analysis of molecular pattern recognition processes. These studies benefit from the high conservation level of all innate immune factors in vertebrates. Zebrafish studies are strategically well positioned for this because of the ease of comparisons with studies in other fish species of which the immune system also has been intensively studied, but that are currently still less amendable to detailed genetic or microscopic studies. In this paper we focus on Toll-like receptor (TLR) signalling factors, which currently are the best characterized in mammalian systems. We review the knowledge on TLR signalling in the context of recent advances in zebrafish studies and discuss possibilities for future approaches that can complement studies in cell cultures and rodent models. A focus in these comparisons is the role of negative control mechanisms in immune responses that appear very important in a whole organism to keep adverse systemic responses in check. We also pay much attention to comparisons with studies in common carp that is highly related to zebrafish and that because of its large body mass can complement immune studies in zebrafish.
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Affiliation(s)
- Zakia Kanwal
- Department of Animal Sciences and Health, Institute of Biology, Leiden University, Einsteinweg 55, 2333 CC Leiden, The Netherlands
| | - Geert F Wiegertjes
- Cell Biology and Immunology Group, Wageningen Institute of Animal Sciences, Wageningen University, PO Box 338, 6700 AH Wageningen, The Netherlands
| | - Wouter J Veneman
- Department of Animal Sciences and Health, Institute of Biology, Leiden University, Einsteinweg 55, 2333 CC Leiden, The Netherlands
| | - Annemarie H Meijer
- Department of Animal Sciences and Health, Institute of Biology, Leiden University, Einsteinweg 55, 2333 CC Leiden, The Netherlands
| | - Herman P Spaink
- Department of Animal Sciences and Health, Institute of Biology, Leiden University, Einsteinweg 55, 2333 CC Leiden, The Netherlands.
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30
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Xin H, Deng K, Fu M. Post-transcriptional gene regulation by RNA-binding proteins in vascular endothelial dysfunction. SCIENCE CHINA. LIFE SCIENCES 2014; 57:836-44. [PMID: 25104457 PMCID: PMC7089175 DOI: 10.1007/s11427-014-4703-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 05/07/2014] [Accepted: 07/01/2014] [Indexed: 12/11/2022]
Abstract
Endothelial cell dysfunction is a term which implies the dysregulation of normal endothelial cell functions, including impairment of the barrier functions, control of vascular tone, disturbance of proliferative and migratory capacity of endothelial cells, as well as control of leukocyte trafficking. Endothelial dysfunction is an early step in vascular inflammatory diseases such as atherosclerosis, diabetic vascular complications, sepsis-induced or severe virus infection-induced organ injuries. The expressions of inflammatory cytokines and vascular adhesion molecules induced by various stimuli, such as modified lipids, smoking, advanced glycation end products and bacteria toxin, significantly contribute to the development of endothelial dysfunction. The transcriptional regulation of inflammatory cytokines and vascular adhesion molecules has been well-studied. However, the regulation of those gene expressions at post-transcriptional level is emerging. RNA-binding proteins have emerged as critical regulators of gene expression acting predominantly at the post-transcriptional level in microRNA-dependent or independent manners. This review summarizes the latest insights into the roles of RNA-binding proteins in controlling vascular endothelial cell functions and their contribution to the pathogenesis of vascular inflammatory diseases.
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Affiliation(s)
- HongBo Xin
- Institute of Translational Medicine, Nanchang University, Nanchang, 330031 China
| | - KeYu Deng
- Institute of Translational Medicine, Nanchang University, Nanchang, 330031 China
| | - MinGui Fu
- Institute of Translational Medicine, Nanchang University, Nanchang, 330031 China
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31
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He Z, Chen X, Wang S, Zou Z. Toll-like receptor 4 monoclonal antibody attenuates lipopolysaccharide-induced acute lung injury in mice. Exp Ther Med 2014; 8:871-876. [PMID: 25120616 PMCID: PMC4113535 DOI: 10.3892/etm.2014.1805] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2014] [Accepted: 05/09/2014] [Indexed: 12/21/2022] Open
Abstract
Toll-like receptor 4 (TLR4) has an important role in the recognition of lipopolysaccharide (LPS) and in the activation of the inflammatory cascade. In the present study, the effect of TLR4 monoclonal antibody (mAb) on LPS-induced acute lung injury (ALI) was investigated in mice. A total of 45 male BALB/c mice were randomly divided into three groups, namely, the control (group C), sepsis (group S) and pretreatment groups (group P). Mice in group P were intraperitoneally treated with TLR4 mAb 1 h prior to the intraperitoneal administration of LPS. Following treatment with LPS for increasing times periods in groups S and P, the mRNA expression level of TLR4 in the lung tissue and the expression of inflammatory factors in the serum were analyzed by quantitative polymerase chain reaction and enzyme-linked immunosorbent assays, respectively. The degree of pulmonary edema, expressed as (wet weight - dry weight)/wet weight, as well as the lung injury scores, observed using a light microscope, were also analyzed. The results demonstrated that intraperitoneal administration of LPS in mice increased the mRNA expression levels of TLR4, the secretion of inflammatory factors in the serum, the degree of pulmonary edema and the lung injury score in a time-dependent manner. However, pretreatment with TLR4 mAb effectively attenuated the increased mRNA expression of TLR4 and the overproduction of inflammatory factors to correct the pulmonary edema and the elevated lung injury score induced by LPS. Therefore, TLR4 plays a critical role in LPS-induced ALI, and the TLR4 mAb decreases the secretion of inflammatory factors and attenuates the degree of pulmonary edema, thereby protecting the lungs from LPS-induced ALI.
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Affiliation(s)
- Zhijie He
- Department of Critical Care Medicine, Sun Yat-sen Memorial Hospital, University of Sun Yat-sen, Guangzhou, Guangdong 510120, P.R. China
| | - Xiaotong Chen
- Department of Critical Care Medicine, Sun Yat-sen Memorial Hospital, University of Sun Yat-sen, Guangzhou, Guangdong 510120, P.R. China
| | - Shouping Wang
- Department of Anesthesiology, Sun Yat-sen Memorial Hospital, University of Sun Yat-sen, Guangzhou, Guangdong 510120, P.R. China
| | - Zijun Zou
- Department of Critical Care Medicine, Sun Yat-sen Memorial Hospital, University of Sun Yat-sen, Guangzhou, Guangdong 510120, P.R. China
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32
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Translational regulation of specific mRNAs controls feedback inhibition and survival during macrophage activation. PLoS Genet 2014; 10:e1004368. [PMID: 24945926 PMCID: PMC4063670 DOI: 10.1371/journal.pgen.1004368] [Citation(s) in RCA: 85] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2014] [Accepted: 03/24/2014] [Indexed: 01/10/2023] Open
Abstract
For a rapid induction and efficient resolution of the inflammatory response, gene expression in cells of the immune system is tightly regulated at the transcriptional and post-transcriptional level. The control of mRNA translation has emerged as an important determinant of protein levels, yet its role in macrophage activation is not well understood. We systematically analyzed the contribution of translational regulation to the early phase of the macrophage response by polysome fractionation from mouse macrophages stimulated with lipopolysaccharide (LPS). Individual mRNAs whose translation is specifically regulated during macrophage activation were identified by microarray analysis. Stimulation with LPS for 1 h caused translational activation of many feedback inhibitors of the inflammatory response including NF-κB inhibitors (Nfkbid, Nfkbiz, Nr4a1, Ier3), a p38 MAPK antagonist (Dusp1) and post-transcriptional suppressors of cytokine expression (Zfp36 and Zc3h12a). Our analysis showed that their translation is repressed in resting and de-repressed in activated macrophages. Quantification of mRNA levels at a high temporal resolution by RNASeq allowed us to define groups with different expression patterns. Thereby, we were able to distinguish mRNAs whose translation is actively regulated from mRNAs whose polysomal shifts are due to changes in mRNA levels. Active up-regulation of translation was associated with a higher content in AU-rich elements (AREs). For one example, Ier3 mRNA, we show that repression in resting cells as well as de-repression after stimulation depends on the ARE. Bone-marrow derived macrophages from Ier3 knockout mice showed reduced survival upon activation, indicating that IER3 induction protects macrophages from LPS-induced cell death. Taken together, our analysis reveals that translational control during macrophage activation is important for cellular survival as well as the expression of anti-inflammatory feedback inhibitors that promote the resolution of inflammation. When macrophages encounter pathogens, they initiate inflammation by secreting pro-inflammatory factors such as the cytokine TNF. Because a prolonged or overshooting release of these factors is harmful for the organism, their production needs to be tightly controlled and shut off in due time. To ensure a rapid but transient inflammatory response, gene expression is regulated at multiple levels, including transcription, stability and translation of mRNAs. While control of transcription and mRNA stability has been studied extensively, little is known about translational regulation in macrophages. In this study, we measured the translation of all mRNAs expressed in mouse macrophages. Upon activation of macrophages with the bacterial cell wall component lipopolysaccharide, we found that many feedback inhibitors, which are important for dampening the inflammatory response, are translationally up-regulated. Translation of these mRNAs is repressed in resting cells and de-repressed after stimulation. In contrast to feedback inhibitors, most cytokines are primarily regulated by changes in mRNA abundance. Furthermore, we could show that one of the feedback inhibitors, IER3, protects macrophages from cell death during activation. Therefore, regulation at the level of translation is important for the induction of negative feedback loops and cellular survival.
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Bustos ML, Huleihel L, Kapetanaki MG, Lino-Cardenas CL, Mroz L, Ellis BM, McVerry BJ, Richards TJ, Kaminski N, Cerdenes N, Mora AL, Rojas M. Aging mesenchymal stem cells fail to protect because of impaired migration and antiinflammatory response. Am J Respir Crit Care Med 2014; 189:787-98. [PMID: 24559482 DOI: 10.1164/rccm.201306-1043oc] [Citation(s) in RCA: 139] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
RATIONALE Aging is characterized by functional impairment and reduced capacity to respond appropriately to environmental stimuli and injury. With age, there is an increase in the incidence and severity of chronic and acute lung diseases. However, the relationship between age and the lung's reduced ability to repair is far from established and necessitates further research in the field. OBJECTIVES Little is currently known about age-related phenomena in mesenchymal stem cells (MSCs). On account of their ability to protect the endothelium and the alveolar epithelium through multiple paracrine mechanisms, we looked for adverse effects that aging might cause in MSC biology. Such age-related changes might partly account for the increased susceptibility of the aging lung to injury. MEASUREMENTS AND MAIN RESULTS We demonstrated that old mice have more inflammation in response to acute lung injury. To investigate the causes, we compared the global gene expression of aged and young bone marrow-derived MSCs (B-MSCs). Our results revealed that the expression levels of inflammatory response genes depended on the age of the B-MSCs. We demonstrated that the age-dependent decrease in expression of several cytokine and chemokine receptors is important for the migration and activation of B-MSCs. Finally, we showed by adoptive transfer of aged B-MSCs to young endotoxemic mice that aged cells lacked the antiinflammatory protective effect of their young counterparts. CONCLUSIONS Taken together, the decreased expression of cytokine and chemokine receptors in aged B-MSCs compromises their protective role by perturbing the potential of B-MSCs to become activated and mobilize to the site of injury.
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Affiliation(s)
- Martha L Bustos
- 1 Division of Pulmonary, Allergy, and Critical Care Medicine, Department of Medicine, and
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Abstract
Toll-like receptors (TLRs) are pattern-recognition receptors that recognize microbial/vial-derived components that trigger innate immune response, which indicate these molecules play a role in host defense against infection. The infection often precedes numerous disorders including glomerular diseases (glomerulonephritis (GN)). It is reported that TLRs are also involved in the risk and progression of GN, and TLRs may be potential therapeutic targets for GN. To date, a number of studies have found that TLRs are involved in the pathogenesis of GN. There is a paucity of reviews in the literature discussing signaling pathways and gene expression for TLRs in GN. This review was performed to provide a relatively complete signaling pathway flowchart for TLRs to the investigators who were interested in the roles of TLRs in the pathogenesis of GN. In the past decades, some studies were also performed to explore the association of TLRs gene expression with the risk of GN. However, the role of TLRs in the pathogenesis of GN remains controversial. Here, the signal transduction pathways of TLRs and its role of gene expression in the pathogenesis of GN were reviewed.
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Affiliation(s)
- Song Mao
- Department of Nephrology, Nanjing Children's Hospital, Affiliated to Nanjing Medical University , Nanjing , China
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Trial J, Cieslik KA, Haudek SB, Duerrschmid C, Entman ML. Th1/M1 conversion to th2/m2 responses in models of inflammation lacking cell death stimulates maturation of monocyte precursors to fibroblasts. Front Immunol 2013; 4:287. [PMID: 24065967 PMCID: PMC3776235 DOI: 10.3389/fimmu.2013.00287] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2013] [Accepted: 09/03/2013] [Indexed: 12/31/2022] Open
Abstract
We have demonstrated that cardiac fibrosis arises from the differentiation of monocyte-derived fibroblasts. We present here evidence that this process requires sequential Th1 and Th2 induction promoting analogous M1 (classically activated) and M2 (alternatively activated) macrophage polarity. Our models are: (1) mice subjected to daily repetitive ischemia and reperfusion (I/R) without infarction and (2) the in vitro transmigration of human mononuclear leukocytes through human cardiac microvascular endothelium. In the mouse heart, leukocytes entered after I/R in response to monocyte chemoattractant protein-1 (MCP-1), which is the major cytokine induced by this protocol. Monocytes within the heart then differentiated into fibroblasts making collagen while bearing the markers of M2 macrophages. T cells were seen in these hearts as well as in the human heart with cardiomyopathy. In the in vitro model, transmigration of the leukocytes was likewise induced by MCP-1 and some monocytes matured into fibroblasts bearing M2 markers. In this model, the MCP-1 stimulus induced a transient Th1 and M1 response that developed into a predominantly Th2 and M2 response. An increase in the Th2 product IL-13 was present in both the human and the mouse models, consistent with its known role in fibrosis. In these simplified models, in which there is no cell death to stimulate an anti-inflammatory response, there is nonetheless a resolution of inflammation enabling a profibrotic environment. This induces the maturation of monocyte precursors into fibroblasts.
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Affiliation(s)
- Joann Trial
- Division of Cardiovascular Sciences, Department of Medicine, DeBakey Heart Center, Baylor College of Medicine , Houston, TX , USA ; Houston Methodist , Houston, TX , USA
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RNA decay tolerizes: MCPIP1 (Zc3h12a) keeps inflammation in check by cleaving 3' UTRs. Immunol Cell Biol 2013; 91:331-2. [PMID: 23628803 DOI: 10.1038/icb.2013.19] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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Miao R, Huang S, Zhou Z, Quinn T, Van Treeck B, Nayyar T, Dim D, Jiang Z, Papasian CJ, Eugene Chen Y, Liu G, Fu M. Targeted disruption of MCPIP1/Zc3h12a results in fatal inflammatory disease. Immunol Cell Biol 2013; 91:368-76. [PMID: 23567898 PMCID: PMC3932977 DOI: 10.1038/icb.2013.11] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Previous studies using MCPIP1/Zc3h12a-deficient mice suggest that MCPIP1 is an important regulator of inflammation and immune homeostasis. However, the characterization of the immunological phenotype of MCPIP1-deficient mice has not been detailed. In this study, we performed evaluation through histological, flow cytometric, ELISA and real-time PCR analysis and found that targeted disruption of MCPIP1 gene leads to fatal, highly aggressive, and widespread immune-related lesions. In addition to previously observed growth retardation, splenomegaly, lymphoadenopathy, severe anemia and premature death, MCPIP1-deficient mice showed disorganization of lymphoid organs, including spleen, lymph nodes and thymus, and massive infiltration of lymphocytes, macrophages and neutrophils into many other non-lymphoid organs, primarily in lungs and liver. Flow cytometric analysis found significant increase in activated and differentiated T cells in peripheral blood and spleen of MCPIP1-deficient mice. Moreover, heightened production of inflammatory cytokines from activated macrophages and T cells were observed in MCPIP1-deficient mice. Interestingly, treatment of MCPIP1-deficient mice with antibiotics resulted in significant improvement of life-span and a decrease in inflammatory syndrome. Taken together, these results suggest a prominent role for MCPIP1 in the control of inflammation and immune homeostasis.
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Affiliation(s)
- Ruidong Miao
- Department of Basic Medical Science, School of Medicine, University of Missouri-Kansas City, Kansas City, MO, USA
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