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Tang D, Kang R, Zeh HJ, Lotze MT. The multifunctional protein HMGB1: 50 years of discovery. Nat Rev Immunol 2023; 23:824-841. [PMID: 37322174 DOI: 10.1038/s41577-023-00894-6] [Citation(s) in RCA: 50] [Impact Index Per Article: 50.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/16/2023] [Indexed: 06/17/2023]
Abstract
Fifty years since the initial discovery of HMGB1 in 1973 as a structural protein of chromatin, HMGB1 is now known to regulate diverse biological processes depending on its subcellular or extracellular localization. These functions include promoting DNA damage repair in the nucleus, sensing nucleic acids and inducing innate immune responses and autophagy in the cytosol and binding protein partners in the extracellular environment and stimulating immunoreceptors. In addition, HMGB1 is a broad sensor of cellular stress that balances cell death and survival responses essential for cellular homeostasis and tissue maintenance. HMGB1 is also an important mediator secreted by immune cells that is involved in a range of pathological conditions, including infectious diseases, ischaemia-reperfusion injury, autoimmunity, cardiovascular and neurodegenerative diseases, metabolic disorders and cancer. In this Review, we discuss the signalling mechanisms, cellular functions and clinical relevance of HMGB1 and describe strategies to modify its release and biological activities in the setting of various diseases.
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Affiliation(s)
- Daolin Tang
- Department of Surgery, UT Southwestern Medical Center, Dallas, TX, USA.
| | - Rui Kang
- Department of Surgery, UT Southwestern Medical Center, Dallas, TX, USA
| | - Herbert J Zeh
- Department of Surgery, UT Southwestern Medical Center, Dallas, TX, USA
| | - Michael T Lotze
- Departments of Surgery, Immunology and Bioengineering, University of Pittsburgh, Pittsburgh, PA, USA.
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Yang R, Zhang X. A potential new pathway for heparin treatment of sepsis-induced lung injury: inhibition of pulmonary endothelial cell pyroptosis by blocking hMGB1-LPS-induced caspase-11 activation. Front Cell Infect Microbiol 2022; 12:984835. [PMID: 36189354 PMCID: PMC9519888 DOI: 10.3389/fcimb.2022.984835] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2022] [Accepted: 08/29/2022] [Indexed: 11/18/2022] Open
Abstract
Sepsis is a significant cause of mortality in critically ill patients. Acute lung injury (ALI) is a leading cause of death in these patients. Endothelial cells exposed to the bacterial endotoxin lipopolysaccharide (LPS) can progress into pyroptosis, a programmed lysis of cell death triggered by inflammatory caspases. It is characterized by lytic cell death induced by the binding of intracellular LPS to caspases 4/5 in human cells and caspase-11 in mouse cells. In mice,caspase-11-dependent pyroptosis plays an important role in endotoxemia. HMGB1 released into the plasma binds to LPS and is internalized into lysosomes in endothelial cells via the advanced glycation end product receptor. In the acidic lysosomal environment, HMGB1 permeates the phospholipid bilayer, which is followed by the leakage of LPS into the cytoplasm and the activation of caspase-11. Heparin is an anticoagulant widely applied in the treatment of thrombotic disease. Previous studies have found that heparin could block caspase-11-dependent inflammatory reactions, decrease sepsis-related mortality, and reduce ALI, independent of its anticoagulant activity. Heparin or modified heparin with no anticoagulant property could inhibit the alarmin HMGB1-LPS interactions, minimize LPS entry into the cytoplasm, and thus blocking caspase-11 activation. Heparin has been studied in septic ALI, but the regulatory mechanism of pulmonary endothelial cell pyroptosis is still unclear. In this paper, we discuss the potential novel role of heparin in the treatment of septic ALI from the unique mechanism of pulmonary endothelial cell pyroptosis.
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Mechanical Compression by Simulating Orthodontic Tooth Movement in an In Vitro Model Modulates Phosphorylation of AKT and MAPKs via TLR4 in Human Periodontal Ligament Cells. Int J Mol Sci 2022; 23:ijms23158062. [PMID: 35897640 PMCID: PMC9331670 DOI: 10.3390/ijms23158062] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2022] [Revised: 07/19/2022] [Accepted: 07/20/2022] [Indexed: 02/05/2023] Open
Abstract
Mechanical compression simulating orthodontic tooth movement in in vitro models induces pro-inflammatory cytokine expression in periodontal ligament (PDL) cells. Our previous work shows that TLR4 is involved in this process. Here, primary PDL cells are isolated and characterized to better understand the cell signaling downstream of key molecules involved in the process of sterile inflammation via TLR4. The TLR4 monoclonal blocking antibody significantly reverses the upregulation of phospho-AKT, caused by compressive force, to levels comparable to controls by inhibition of TLR4. Phospho-ERK and phospho-p38 are also modulated in the short term via TLR4. Additionally, moderate compressive forces of 2 g/cm2, a gold standard for static compressive mechanical stimulation, are not able to induce translocation of Nf-kB and phospho-ERK into the nucleus. Accordingly, we demonstrated for the first time that TLR4 is also one of the triggers for signal transduction under compressive force. The TLR4, one of the pattern recognition receptors, is involved through its specific molecular structures on damaged cells during mechanical stress. Our findings provide the basis for further research on TLR4 in the modulation of sterile inflammation during orthodontic therapy and periodontal remodeling.
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Koenig A, Buskiewicz-Koenig IA. Redox Activation of Mitochondrial DAMPs and the Metabolic Consequences for Development of Autoimmunity. Antioxid Redox Signal 2022; 36:441-461. [PMID: 35352943 PMCID: PMC8982130 DOI: 10.1089/ars.2021.0073] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Significance: Reactive oxygen species (ROS) are well known to promote innate immune responses during and in the absence of microbial infections. However, excessive or prolonged exposure to ROS provokes innate immune signaling dysfunction and contributes to the pathogenesis of many autoimmune diseases. The relatively high basal expression of pattern recognition receptors (PRRs) in innate immune cells renders them prone to activation in response to minor intrinsic or extrinsic ROS misbalances in the absence of pathogens. Critical Issues: A prominent source of ROS are mitochondria, which are also major inter-organelle hubs for innate immunity activation, since most PRRs and downstream receptor molecules are directly located either at mitochondria or at mitochondria-associated membranes. Due to their ancestral bacterial origin, mitochondria can also act as quasi-intrinsic self-microbes that mimic a pathogen invasion and become a source of danger-associated molecular patterns (DAMPs) that triggers innate immunity from within. Recent Advances: The release of mitochondrial DAMPs correlates with mitochondrial metabolism changes and increased generation of ROS, which can lead to the oxidative modification of DAMPs. Recent studies suggest that ROS-modified mitochondrial DAMPs possess increased, persistent immunogenicity. Future Directions: Herein, we discuss how mitochondrial DAMP release and oxidation activates PRRs, changes cellular metabolism, and causes innate immune response dysfunction by promoting systemic inflammation, thereby contributing to the onset or progression of autoimmune diseases. The future goal is to understand what the tipping point for DAMPs is to become oxidized, and whether this is a road without return. Antioxid. Redox Signal. 36, 441-461.
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Affiliation(s)
- Andreas Koenig
- Department of Microbiology and Immunology, SUNY Upstate Medical University, Syracuse, New York, USA
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Yanai H, Hangai S, Taniguchi T. Damage-associated molecular patterns and Toll-like receptors in the tumor immune microenvironment. Int Immunol 2021; 33:841-846. [PMID: 34357403 DOI: 10.1093/intimm/dxab050] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2021] [Accepted: 08/06/2021] [Indexed: 11/14/2022] Open
Abstract
As clinically demonstrated by the success of immunotherapies to improve survival outcomes, tumors are known to gain a survival advantage by circumventing immune surveillance. A defining feature of this is the creation and maintenance of a tumor immune microenvironment (TIME) that directly and indirectly alters the host's immunologic signaling pathways through a variety of mechanisms. Tumor-intrinsic mechanisms that instruct the formation and maintenance of the TIME have been an area of intensive study, such as the identification and characterization of soluble factors actively and passively released by tumor cells that modulate immune cell function. In particular, damage-associated molecular pattern molecules (DAMPs) typically released by necrotic tumor cells are recognized by innate immune receptors such as Toll-like receptors (TLRs) and stimulate immune cells within TIME. Given their broad and potent effects on the immune system, a better understanding for how DAMP and TLR interactions sculpt the TIME to favor tumor growth would identify new strategies and approaches for cancer immunotherapy.
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Affiliation(s)
- Hideyuki Yanai
- Department of Inflammology, Research Center for Advanced Science and Technology, University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8904, Japan
| | - Sho Hangai
- Department of Inflammology, Research Center for Advanced Science and Technology, University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8904, Japan
| | - Tadatsugu Taniguchi
- Department of Inflammology, Research Center for Advanced Science and Technology, University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8904, Japan
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Zhang J, Hua XF, Gu J, Chen F, Gu J, Gong CX, Liu F, Dai CL. High Mobility Group Box 1 Ameliorates Cognitive Impairment in the 3×Tg-AD Mouse Model. J Alzheimers Dis 2021; 74:851-864. [PMID: 32116254 DOI: 10.3233/jad-191110] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
BACKGROUND Alzheimer's disease (AD) is the most common cause of dementia. Studies indicate that neuroinflammation plays an important role in the pathophysiology of AD. High-mobility group box 1 (HMGB1) is an important chromatin protein. It can be secreted by immune cells and passively released from damaged cells to promote inflammation. HMGB1 also can recruit stem cells and promote their proliferation and tissue repairing. However, the role of HMGB1 in the progression of AD is currently unknown. OBJECTIVE The aims were to investigate the effect of HMGB1 on the AD-related pathologies and cognitive function using 3×Tg-AD mouse model. METHODS Female 5-month-old 3×Tg-AD mice were intracerebroventricularly injected with 4.5 μg of HMGB1 or with saline as a control. The levels of interesting protein were assessed by western blots or immunofluorescence. The effect of HMGB1 on the cognitive function was evaluated by one-trial novel object recognition test and Morris water maze. RESULTS Intracerebroventricular injection of recombinant HMGB1 ameliorated cognitive impairment in 5-6-month-old 3×Tg-AD mice. The levels of synapsin 1, synaptophysin, MAP2, NeuN, and phosphorylated CREB were increased in HMGB1-treated 3×Tg-AD mouse brains. HMGB1 decreased intracellular amyloid-β level but did not affect tau phosphorylation. HMGB1 treatment also promoted neurogenesis in the dentate gyrus and increased the level of GFAP in the 3×Tg-AD mouse brains. CONCLUSION These results reveal a novel function of HMGB1 in enhancing neuroplasticity and improving cognitive function in 3×Tg-AD mice.
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Affiliation(s)
- Jin Zhang
- Department of Rehabilitation, Guangzhou First People's Hospital, School of Medicine, South China University of Technology, Guangzhou, Guangdong, China.,Department of Neurochemistry, Inge Grundke-Iqbal Research Floor, New York State Institute for Basic Research in Developmental Disabilities, Staten Island, NY, USA
| | - Xue-Feng Hua
- Department of Rehabilitation, Guangzhou First People's Hospital, School of Medicine, South China University of Technology, Guangzhou, Guangdong, China
| | - Jinhua Gu
- Department of Neurochemistry, Inge Grundke-Iqbal Research Floor, New York State Institute for Basic Research in Developmental Disabilities, Staten Island, NY, USA
| | - Feng Chen
- Department of Neurochemistry, Inge Grundke-Iqbal Research Floor, New York State Institute for Basic Research in Developmental Disabilities, Staten Island, NY, USA
| | - Jianlan Gu
- Department of Neurochemistry, Inge Grundke-Iqbal Research Floor, New York State Institute for Basic Research in Developmental Disabilities, Staten Island, NY, USA
| | - Cheng-Xin Gong
- Department of Neurochemistry, Inge Grundke-Iqbal Research Floor, New York State Institute for Basic Research in Developmental Disabilities, Staten Island, NY, USA
| | - Fei Liu
- Department of Neurochemistry, Inge Grundke-Iqbal Research Floor, New York State Institute for Basic Research in Developmental Disabilities, Staten Island, NY, USA
| | - Chun-Ling Dai
- Department of Neurochemistry, Inge Grundke-Iqbal Research Floor, New York State Institute for Basic Research in Developmental Disabilities, Staten Island, NY, USA
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Regulation of Neurogenesis in Mouse Brain by HMGB1. Cells 2020; 9:cells9071714. [PMID: 32708917 PMCID: PMC7407245 DOI: 10.3390/cells9071714] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2020] [Revised: 07/11/2020] [Accepted: 07/15/2020] [Indexed: 12/11/2022] Open
Abstract
The High Mobility Group Box 1 (HMGB1) is the most abundant nuclear nonhistone protein that is involved in transcription regulation. In addition, HMGB1 has previously been found as an extracellularly acting protein enhancing neurite outgrowth in cultured neurons. Although HMGB1 is widely expressed in the developing central nervous system of vertebrates and invertebrates, its function in the developing mouse brain is poorly understood. Here, we have analyzed developmental defects of the HMGB1 null mouse forebrain, and further examined our findings in ex vivo brain cell cultures. We find that HMGB1 is required for the proliferation and differentiation of neuronal stem cells/progenitor cells. Enhanced apoptosis is also found in the neuronal cells lacking HMGB1. Moreover, HMGB1 depletion disrupts Wnt/β-catenin signaling and the expression of transcription factors in the developing cortex, including Foxg1, Tbr2, Emx2, and Lhx6. Finally, HMGB1 null mice display aberrant expression of CXCL12/CXCR4 and reduced RAGE signaling. In conclusion, HMGB1 plays a critical role in mammalian neurogenesis and brain development.
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Emergence of antibodies endowed with proteolytic activity against High-mobility group box 1 protein (HMGB1) in patients surviving septic shock. Cell Immunol 2019; 347:104020. [PMID: 31767118 DOI: 10.1016/j.cellimm.2019.104020] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2019] [Revised: 10/29/2019] [Accepted: 11/14/2019] [Indexed: 12/24/2022]
Abstract
High-mobility group box 1 (HMGB1) concentration in serum or plasma has been proposed as an important biological marker in various inflammation-related pathologies. We previously showed that low titer autoantibodies against HMGB1 could emerge during the course of sepsis. Importantly their presence was positively related with patients' survival. In this study, we focused on plasma samples from 2 patients who survived sepsis and exhibited high titer antibodies to HMGB1. These antibodies were proved to be specific for HMGB1 since they did not bind to HMGB2 or to human serum albumin. Following IgG purification, it has shown that both patients secreted HMGB1-hydrolyzing autoantibodies in vitro. These findings suggested that proteolytic antibodies directed against HMGB1 can be produced in patients surviving septic shock.
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Paudel YN, Angelopoulou E, Piperi C, Balasubramaniam VR, Othman I, Shaikh MF. Enlightening the role of high mobility group box 1 (HMGB1) in inflammation: Updates on receptor signalling. Eur J Pharmacol 2019; 858:172487. [DOI: 10.1016/j.ejphar.2019.172487] [Citation(s) in RCA: 81] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2019] [Revised: 06/19/2019] [Accepted: 06/19/2019] [Indexed: 12/17/2022]
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Wang Y, Wang L, Gong Z. Regulation of Acetylation in High Mobility Group Protein B1 Cytosol Translocation. DNA Cell Biol 2019; 38:491-499. [PMID: 30874449 DOI: 10.1089/dna.2018.4592] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
High mobility group protein B1 (HMGB1) is a nonhistone that mainly binds to nucleus DNA. As an important late inflammatory transmitter, extracellular HMGB1 is involved in the inflammatory immune response, tumor growth, infiltration, and metastasis. HMGB1 is actively released by activated inflammatory cells or passively released by necrotic cells. Then the released extracellular HMGB1 further induces monocytes/macrophages, neutrophils, and dendritic cells to secrete inflammatory cytokines. Therefore, HMGB1 can not only act as a proinflammatory factor to directly involve in tissue damage, but also acts as an inflammatory medium to aggravate the inflammatory cascade reaction. Studies have shown that the post-translational modification (PTM) participated in the process of HMGB1 cytosol translocation and extracellular release. The acetylation modification is the most common PTM for localization sequence of HMGB1, and the affinity of HMGB1 to DNA depends on the degree of acetylation for HMGB1. The acetylation can weaken the binding of HMGB1 to DNA, which means less HMGB1 cytosol translocation and extracellular release. This article reviews the acetylation regulation mechanisms of cytosol translocation and extracellular release of HMGB1 and provides a therapeutic strategy for controlling HMGB1-induced inflammatory responses in the future.
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Affiliation(s)
- Yao Wang
- Department of Infectious Diseases, Renmin Hospital of Wuhan University, Wuhan, China
| | - Luwen Wang
- Department of Infectious Diseases, Renmin Hospital of Wuhan University, Wuhan, China
| | - Zuojiong Gong
- Department of Infectious Diseases, Renmin Hospital of Wuhan University, Wuhan, China
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Yu R, Jiang S, Tao Y, Li P, Yin J, Zhou Q. Inhibition of HMGB1 improves necrotizing enterocolitis by inhibiting NLRP3 via TLR4 and NF-κB signaling pathways. J Cell Physiol 2019; 234:13431-13438. [PMID: 30618088 DOI: 10.1002/jcp.28022] [Citation(s) in RCA: 82] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2018] [Accepted: 11/30/2018] [Indexed: 11/09/2022]
Abstract
OBJECTIVE To explore the relationship between high-mobility group box 1 (HMGB1) and NLR pyrin domain containing 3 (NLRP3) in the development of necrotizing enterocolitis (NEC). METHODS NEC rat models were constructed and treated with HMGB1 inhibitor glycyrrhizin (GL) with different concentration. An inflammatory condition of intestinal tissue in newborn NEC rats was observed by hematoxylin and eosin staining. The messenger RNA (mRNA) and protein expression of HMGB1, NLRP3, toll-like receptor 4 (TLR4), nuclear factor-κB (NF-κB), and caspase 1 were determined by real-time polymerase chain reaction and western blot analysis, respectively. The content of interleukin (IL)-1β and tumor necrosis factor-α (TNF-α) was determined by enzyme-linked immunosorbent assay. Human intestinal epithelial cell lines were induced to NEC by lipopolysaccharides (LPSs). LPS-induced cells were transfected with small interfering RNA-HMGB1 and NLRP3 plasmid vector. The mRNA and protein expression of HMGB1, NLRP3, TLR4, NF-κB, caspase 1, IL-1β, and TNF-α were determined by real-time PCR and western blot analysis, respectively. RESULTS The mRNA and protein expression of HMGB1 and NLRP3 in the NEC group was significantly higher than the control group. Inhibition of HMGB1 expression improved intestinal inflammation in newborn NEC rats. The expression of HMGB1, NLRP3, TLR4, NF-κB, and caspase 1 was upregulated in NEC and was weakened after treating with GL. LPS induction to intestinal epithelial cells markedly increased the expression of HMGB1, NLRP3, TLR4, NF-κB, caspase 1, IL-1β, and TNF-α. The knockdown of HMGB1 abolished the increase of expression, whereas further transfection with NLRP3 plasmid vector recovered the increase. CONCLUSION HMGB1 and NLRP3 were all upregulated in the development of NEC. Inhibition on HMGB1 could improve the intestinal inflammation in NEC by inhibiting NLRP3 via TLR4 and NF-κB signaling pathways.
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Affiliation(s)
- Renqiang Yu
- Department of Neonatology, The Affiliated Wuxi Maternity and Child Health Care Hospital of Nanjing Medical University, Wuxi, China
| | - Shanyu Jiang
- Department of Neonatology, The Affiliated Wuxi Maternity and Child Health Care Hospital of Nanjing Medical University, Wuxi, China
| | - Yaqin Tao
- Department of Neonatology, The Affiliated Wuxi Maternity and Child Health Care Hospital of Nanjing Medical University, Wuxi, China
| | - Ping Li
- Department of Neonatology, The Affiliated Wuxi Maternity and Child Health Care Hospital of Nanjing Medical University, Wuxi, China
| | - Juan Yin
- Department of Neonatology, The Affiliated Wuxi Maternity and Child Health Care Hospital of Nanjing Medical University, Wuxi, China
| | - Qin Zhou
- Department of Neonatology, The Affiliated Wuxi Maternity and Child Health Care Hospital of Nanjing Medical University, Wuxi, China
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Bajwa E, Pointer CB, Klegeris A. The Role of Mitochondrial Damage-Associated Molecular Patterns in Chronic Neuroinflammation. Mediators Inflamm 2019; 2019:4050796. [PMID: 31065234 PMCID: PMC6466851 DOI: 10.1155/2019/4050796] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2018] [Revised: 03/01/2019] [Accepted: 03/06/2019] [Indexed: 01/05/2023] Open
Abstract
Mitochondrial dysfunction has been established as a common feature of neurodegenerative disorders that contributes to disease pathology by causing impaired cellular energy production. Mitochondrial molecules released into the extracellular space following neuronal damage or death may also play a role in these diseases by acting as signaling molecules called damage-associated molecular patterns (DAMPs). Mitochondrial DAMPs have been shown to initiate proinflammatory immune responses from nonneuronal glial cells, including microglia and astrocytes; thereby, they have the potential to contribute to the chronic neuroinflammation present in these disorders accelerating the degeneration of neurons. In this review, we highlight the mitochondrial DAMPs cytochrome c (CytC), mitochondrial transcription factor A (TFAM), and cardiolipin and explore their potential role in the central nervous system disorders including Alzheimer's disease and Parkinson's disease, which are characterized by neurodegeneration and chronic neuroinflammation.
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Affiliation(s)
- Ekta Bajwa
- Department of Biology, University of British Columbia Okanagan Campus, Kelowna, BC, Canada
| | - Caitlin B. Pointer
- Department of Biology, University of British Columbia Okanagan Campus, Kelowna, BC, Canada
| | - Andis Klegeris
- Department of Biology, University of British Columbia Okanagan Campus, Kelowna, BC, Canada
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Deng M, Tang Y, Li W, Wang X, Zhang R, Zhang X, Zhao X, Liu J, Tang C, Liu Z, Huang Y, Peng H, Xiao L, Tang D, Scott MJ, Wang Q, Liu J, Xiao X, Watkins S, Li J, Yang H, Wang H, Chen F, Tracey KJ, Billiar TR, Lu B. The Endotoxin Delivery Protein HMGB1 Mediates Caspase-11-Dependent Lethality in Sepsis. Immunity 2018; 49:740-753.e7. [PMID: 30314759 PMCID: PMC6300139 DOI: 10.1016/j.immuni.2018.08.016] [Citation(s) in RCA: 348] [Impact Index Per Article: 58.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2017] [Revised: 06/19/2018] [Accepted: 08/16/2018] [Indexed: 12/28/2022]
Abstract
Caspase-11, a cytosolic endotoxin (lipopolysaccharide: LPS) receptor, mediates pyroptosis, a lytic form of cell death. Caspase-11-dependent pyroptosis mediates lethality in endotoxemia, but it is unclear how LPS is delivered into the cytosol for the activation of caspase-11. Here we discovered that hepatocyte-released high mobility group box 1 (HMGB1) was required for caspase-11-dependent pyroptosis and lethality in endotoxemia and bacterial sepsis. Mechanistically, hepatocyte-released HMGB1 bound LPS and targeted its internalization into the lysosomes of macrophages and endothelial cells via the receptor for advanced glycation end-products (RAGE). Subsequently, HMGB1 permeabilized the phospholipid bilayer in the acidic environment of lysosomes. This resulted in LPS leakage into the cytosol and caspase-11 activation. Depletion of hepatocyte HMGB1, inhibition of hepatocyte HMGB1 release, neutralizing extracellular HMGB1, or RAGE deficiency prevented caspase-11-dependent pyroptosis and death in endotoxemia and bacterial sepsis. These findings indicate that HMGB1 interacts with LPS to mediate caspase-11-dependent pyroptosis in lethal sepsis.
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Affiliation(s)
- Meihong Deng
- Department of Surgery, University of Pittsburgh School of Medicine, Pittsburgh, PA 15213, USA
| | - Yiting Tang
- Department of Physiology, School of Basic Medical Science, Central South University, Changsha, Hunan Province 410000, P.R. China
| | - Wenbo Li
- Department of Hematology and Key Laboratory of Non-resolving Inflammation and Cancer of Hunan Province, The 3rd Xiangya Hospital, Central South University, Changsha 410000, P.R. China; Key Laboratory of Medical Genetics, School of Biological Science and Technology, Central South University, Changsha, Hunan Province 410000, P.R. China
| | - Xiangyu Wang
- Department of Hematology and Key Laboratory of Non-resolving Inflammation and Cancer of Hunan Province, The 3rd Xiangya Hospital, Central South University, Changsha 410000, P.R. China; Key Laboratory of Medical Genetics, School of Biological Science and Technology, Central South University, Changsha, Hunan Province 410000, P.R. China; Key Laboratory of Sepsis Translational Medicine of Hunan, Central South University, Changsha, Hunan Province 410000, P.R. China
| | - Rui Zhang
- Department of Hematology and Key Laboratory of Non-resolving Inflammation and Cancer of Hunan Province, The 3rd Xiangya Hospital, Central South University, Changsha 410000, P.R. China; Key Laboratory of Medical Genetics, School of Biological Science and Technology, Central South University, Changsha, Hunan Province 410000, P.R. China; Key Laboratory of Sepsis Translational Medicine of Hunan, Central South University, Changsha, Hunan Province 410000, P.R. China
| | - Xianying Zhang
- Department of Hematology and Key Laboratory of Non-resolving Inflammation and Cancer of Hunan Province, The 3rd Xiangya Hospital, Central South University, Changsha 410000, P.R. China; Key Laboratory of Medical Genetics, School of Biological Science and Technology, Central South University, Changsha, Hunan Province 410000, P.R. China; Key Laboratory of Sepsis Translational Medicine of Hunan, Central South University, Changsha, Hunan Province 410000, P.R. China
| | - Xin Zhao
- Department of Hematology and Key Laboratory of Non-resolving Inflammation and Cancer of Hunan Province, The 3rd Xiangya Hospital, Central South University, Changsha 410000, P.R. China; Key Laboratory of Medical Genetics, School of Biological Science and Technology, Central South University, Changsha, Hunan Province 410000, P.R. China; Key Laboratory of Sepsis Translational Medicine of Hunan, Central South University, Changsha, Hunan Province 410000, P.R. China
| | - Jian Liu
- Department of Hematology and Key Laboratory of Non-resolving Inflammation and Cancer of Hunan Province, The 3rd Xiangya Hospital, Central South University, Changsha 410000, P.R. China; Key Laboratory of Medical Genetics, School of Biological Science and Technology, Central South University, Changsha, Hunan Province 410000, P.R. China; Key Laboratory of Sepsis Translational Medicine of Hunan, Central South University, Changsha, Hunan Province 410000, P.R. China
| | - Cheng Tang
- College of Life Science, Hunan Normal University, Changsha 410081, P.R. China
| | - Zhonghua Liu
- College of Life Science, Hunan Normal University, Changsha 410081, P.R. China
| | - Yongzhuo Huang
- Shanghai Institute of Materia Medica, Chinese Academy of Science, 501 Hai-ke Rd, Shanghai 201203, P.R. China
| | - Huige Peng
- Shanghai Institute of Materia Medica, Chinese Academy of Science, 501 Hai-ke Rd, Shanghai 201203, P.R. China
| | - Lehui Xiao
- College of Chemistry, Nankai University, Tianjin 300073, P.R. China
| | - Daolin Tang
- Department of Surgery, University of Pittsburgh School of Medicine, Pittsburgh, PA 15213, USA
| | - Melanie J Scott
- Department of Surgery, University of Pittsburgh School of Medicine, Pittsburgh, PA 15213, USA
| | - Qingde Wang
- Department of Surgery, University of Pittsburgh School of Medicine, Pittsburgh, PA 15213, USA
| | - Jing Liu
- Department of Hematology and Key Laboratory of Non-resolving Inflammation and Cancer of Hunan Province, The 3rd Xiangya Hospital, Central South University, Changsha 410000, P.R. China
| | - Xianzhong Xiao
- Key Laboratory of Sepsis Translational Medicine of Hunan, Central South University, Changsha, Hunan Province 410000, P.R. China
| | - Simon Watkins
- Center for Biologic Imaging, University of Pittsburgh School of Medicine, Pittsburgh, PA 15213, USA
| | - Jianhua Li
- Laboratory of Biomedical Science, The Feinstein Institute for Medical Research, Northwell Health, 350 Community Drive, Manhasset, NY 11030, USA
| | - Huan Yang
- Laboratory of Biomedical Science, The Feinstein Institute for Medical Research, Northwell Health, 350 Community Drive, Manhasset, NY 11030, USA
| | - Haichao Wang
- Department of Emergency Medicine, North Shore University Hospital, Northwell Health, 350 Community Drive, Manhasset, NY 11030, USA
| | - Fangping Chen
- Department of Hematology and Key Laboratory of Non-resolving Inflammation and Cancer of Hunan Province, The 3rd Xiangya Hospital, Central South University, Changsha 410000, P.R. China
| | - Kevin J Tracey
- Laboratory of Biomedical Science, The Feinstein Institute for Medical Research, Northwell Health, 350 Community Drive, Manhasset, NY 11030, USA
| | - Timothy R Billiar
- Department of Surgery, University of Pittsburgh School of Medicine, Pittsburgh, PA 15213, USA.
| | - Ben Lu
- Department of Hematology and Key Laboratory of Non-resolving Inflammation and Cancer of Hunan Province, The 3rd Xiangya Hospital, Central South University, Changsha 410000, P.R. China; Key Laboratory of Medical Genetics, School of Biological Science and Technology, Central South University, Changsha, Hunan Province 410000, P.R. China; Key Laboratory of Sepsis Translational Medicine of Hunan, Central South University, Changsha, Hunan Province 410000, P.R. China.
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14
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Rouhiainen A, Nykänen NP, Kuja-Panula J, Vanttola P, Huttunen HJ, Rauvala H. Inhibition of Homophilic Interactions and Ligand Binding of the Receptor for Advanced Glycation End Products by Heparin and Heparin-Related Carbohydrate Structures. MEDICINES (BASEL, SWITZERLAND) 2018; 5:E79. [PMID: 30061484 PMCID: PMC6165534 DOI: 10.3390/medicines5030079] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/14/2018] [Revised: 07/08/2018] [Accepted: 07/23/2018] [Indexed: 01/12/2023]
Abstract
Background: Heparin and heparin-related sulphated carbohydrates inhibit ligand binding of the receptor for advanced glycation end products (RAGE). Here, we have studied the ability of heparin to inhibit homophilic interactions of RAGE in living cells and studied how heparin related structures interfere with RAGE⁻ligand interactions. Methods: Homophilic interactions of RAGE were studied with bead aggregation and living cell protein-fragment complementation assays. Ligand binding was analyzed with microwell binding and chromatographic assays. Cell surface advanced glycation end product binding to RAGE was studied using PC3 cell adhesion assay. Results: Homophilic binding of RAGE was mediated by V₁- and modulated by C₂-domain in bead aggregation assay. Dimerisation of RAGE on the living cell surface was inhibited by heparin. Sulphated K5 carbohydrate fragments inhibited RAGE binding to amyloid β-peptide and HMGB1. The inhibition was dependent on the level of sulfation and the length of the carbohydrate backbone. α-d-Glucopyranosiduronic acid (glycyrrhizin) inhibited RAGE binding to advanced glycation end products in PC3 cell adhesion and protein binding assays. Further, glycyrrhizin inhibited HMGB1 and HMGB1 A-box binding to heparin. Conclusions: Our results show that K5 polysaccharides and glycyrrhizin are promising candidates for RAGE targeting drug development.
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Affiliation(s)
- Ari Rouhiainen
- Neuroscience Center, University of Helsinki, 00014 Helsinki, Finland.
- Department of Biosciences, University of Helsinki, 00014 Helsinki, Finland.
| | - Niko-Petteri Nykänen
- Neuroscience Center, University of Helsinki, 00014 Helsinki, Finland.
- Department of Translational Neurodegeneration, German Center for Neurodegenerative Diseases (DZNE), D-81377 Munich, Germany.
| | - Juha Kuja-Panula
- Neuroscience Center, University of Helsinki, 00014 Helsinki, Finland.
| | - Päivi Vanttola
- Neuroscience Center, University of Helsinki, 00014 Helsinki, Finland.
- Faculty of Medicine, University of Helsinki, 00014 Helsinki, Finland.
| | - Henri J Huttunen
- Neuroscience Center, University of Helsinki, 00014 Helsinki, Finland.
| | - Heikki Rauvala
- Neuroscience Center, University of Helsinki, 00014 Helsinki, Finland.
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15
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Kim SY, Son M, Lee SE, Park IH, Kwak MS, Han M, Lee HS, Kim ES, Kim JY, Lee JE, Choi JE, Diamond B, Shin JS. High-Mobility Group Box 1-Induced Complement Activation Causes Sterile Inflammation. Front Immunol 2018; 9:705. [PMID: 29696019 PMCID: PMC5904255 DOI: 10.3389/fimmu.2018.00705] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2018] [Accepted: 03/22/2018] [Indexed: 12/24/2022] Open
Abstract
High-mobility group box 1 (HMGB1), a well-known danger-associated molecular pattern molecule, acts as a pro-inflammatory molecule when secreted by activated immune cells or released after necrotic cell damage. HMGB1 binds to immunogenic bacterial components and augments septic inflammation. In this study, we show how HMGB1 mediates complement activation, promoting sterile inflammation. We show that HMGB1 activates the classical pathway of complement system in an antibody-independent manner after binding to C1q. The C3a complement activation product in human plasma and C5b-9 membrane attack complexes on cell membrane surface are detected after the addition of HMGB1. In an acetaminophen (APAP)-induced hepatotoxicity model, APAP injection reduced HMGB1 levels and elevated C3 levels in C1q-deficient mouse serum samples, compared to that in wild-type (WT) mice. APAP-induced C3 consumption was inhibited by sRAGE treatment in WT mice. Moreover, in a mouse model of brain ischemia–reperfusion injury based on middle cerebral arterial occlusion, C5b-9 complexes were deposited on vessels where HMGB1 was accumulated, an effect that was suppressed upon HMGB1 neutralization. We propose that the HMGB1 released after cell necrosis and in ischemic condition can trigger the classical pathway of complement activation to exacerbate sterile inflammation.
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Affiliation(s)
- Sook Young Kim
- Department of Microbiology, Yonsei University College of Medicine, Seoul, South Korea
| | - Myoungsun Son
- The Center for Autoimmune Musculoskeletal and Hematopoietic Diseases, The Feinstein Institute for Medical Research, Manhasset, NY, United States
| | - Sang Eun Lee
- Department of Microbiology, Yonsei University College of Medicine, Seoul, South Korea
| | - In Ho Park
- Department of Microbiology, Yonsei University College of Medicine, Seoul, South Korea.,Severance Biomedical Science Institute and Institute for Immunology and Immunological Diseases, Yonsei University College of Medicine, Seoul, South Korea
| | - Man Sup Kwak
- Department of Microbiology, Yonsei University College of Medicine, Seoul, South Korea
| | - Myeonggil Han
- Department of Microbiology, Yonsei University College of Medicine, Seoul, South Korea
| | - Hyun Sook Lee
- Department of Microbiology, Yonsei University College of Medicine, Seoul, South Korea
| | - Eun Sook Kim
- Department of Microbiology, Yonsei University College of Medicine, Seoul, South Korea
| | - Jae-Young Kim
- Department of Anatomy, Yonsei University College of Medicine, Seoul, South Korea
| | - Jong Eun Lee
- Department of Anatomy, Yonsei University College of Medicine, Seoul, South Korea
| | - Ji Eun Choi
- Department of Pediatrics, Seoul National University Boramae Hospital, Seoul National University College of Medicine, Seoul, South Korea
| | - Betty Diamond
- The Center for Autoimmune Musculoskeletal and Hematopoietic Diseases, The Feinstein Institute for Medical Research, Manhasset, NY, United States
| | - Jeon-Soo Shin
- Department of Microbiology, Yonsei University College of Medicine, Seoul, South Korea.,Severance Biomedical Science Institute and Institute for Immunology and Immunological Diseases, Yonsei University College of Medicine, Seoul, South Korea.,Center for Nanomedicine, Institute for Basic Science (IBS), Seoul, South Korea
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16
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Nosaka N, Hatayama K, Yamada M, Fujii Y, Yashiro M, Wake H, Tsukahara H, Nishibori M, Morishima T. Anti-high mobility group box-1 monoclonal antibody treatment of brain edema induced by influenza infection and lipopolysaccharide. J Med Virol 2018; 90:1192-1198. [PMID: 29573352 DOI: 10.1002/jmv.25076] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2017] [Accepted: 03/06/2018] [Indexed: 11/08/2022]
Abstract
Encephalopathy is a major cause of influenza-associated child death and severe neurological sequelae in Japan, highlighting the urgent need for new therapeutic strategies. In this study, we evaluated the effects of anti-high mobility group box-1 monoclonal antibody (α-HMGB1) treatment on brain edema induced by influenza A virus (IAV) and lipopolysaccharide in 4-week-old BALB/c female mice. The results showed that administration of 7.5 mg/kg α-HMGB1 1 h after IAV (A/Puerto Rico/8/34) inoculation significantly alleviated brain edema at 48 h after IAV inoculation, as confirmed by the suppression of Evans Blue dye leakage and matrix metallopeptidase-9 mRNA expression in the brain. Moreover, we also observed suppression of oxidative stress and different cytokines in IAV-inoculated mice. The expression of plasminogen activator inhibitor-1 was also attenuated following treatment with α-HMGB1. Notably, α-HMGB1 treatment had no effect on virus propagation in the lung. In summary, anti-HMGB1 treatment may improve the prognosis in cases with influenza-associated encephalopathy by attenuating brain edema and reducing the inflammatory responses induced by HMGB1.
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Affiliation(s)
- Nobuyuki Nosaka
- Department of Pediatrics, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Kazuki Hatayama
- Department of Pediatrics, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Mutsuko Yamada
- Department of Pediatrics, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Yousuke Fujii
- Department of Pediatrics, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Masato Yashiro
- Department of Pediatrics, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Hidenori Wake
- Department of Pharmacology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Hirokazu Tsukahara
- Department of Pediatrics, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Masahiro Nishibori
- Department of Pharmacology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Tsuneo Morishima
- Department of Pediatrics, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan.,Aichi Medical University, Aichi, Japan
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17
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Li R, Wang J, Li R, Zhu F, Xu W, Zha G, He G, Cao H, Wang Y, Yang J. ATP/P2X7-NLRP3 axis of dendritic cells participates in the regulation of airway inflammation and hyper-responsiveness in asthma by mediating HMGB1 expression and secretion. Exp Cell Res 2018; 366:1-15. [PMID: 29545090 DOI: 10.1016/j.yexcr.2018.03.002] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2018] [Revised: 02/18/2018] [Accepted: 03/03/2018] [Indexed: 12/19/2022]
Abstract
The ATP/P2X7 axis of dendritic cells (DCs) mediates the activation of NLRP3 inflammasome and promotes secretion of interleukin (IL)-1β and IL-18 to induce T helper (Th) 2, Th17 differentiation in the pathogenesis of asthma. NLRP3 inflammasome also regulates high mobility protein 1 (HMGB1) release in DCs. Recent studies demonstrated the correlation between HMGB1 expression and airway inflammation and hyper-responsiveness (AHR) in asthma. However, the relationship between the ATP/P2X7-NLRP3 axis and HMGB1 in DCs in asthma is still unclear. ATP, apyrase, Brilliant Blue G, BzATP, glibenclamide, and Z-YVAD-FMK were administered to ovalbumin (OVA)-induced murine asthmatic model. For in vitro studies, bone marrow-derived mononuclear cells (BMDCs) were primed with LPS and stimulated with the same reagents. Activation of the ATP/P2X7 axis aggravated airway inflammation and AHR in the lung and induced Th2, Th17 polarization in asthmatic mice. Inhibition of NLRP3 inflammasome weakened cardinal features of asthma and blocked Th2, Th17 polarization. In vitro and vivo, ATP/P2X7 axis activated NLRP3 inflammasome and induced HMGB1 expression and release from DCs. Inhibition of NLRP3 inflammasome reduced HMGB1 expression and release. The ATP/P2X7-NLRP3 axis of DCs participates in mediating airway inflammation, AHR, and promoting Th2, Th17 inflammatory responses in asthmatic mice by inducing HMGB1 expression and secretion.
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Affiliation(s)
- Ruiting Li
- Department of Respiratory Medicine, Zhongnan Hospital of Wuhan University, 169 Donghu Road, Wuhan, Hubei 430071, PR China
| | - Jing Wang
- Department of Intensive Care Unit, Zhongnan Hospital of Wuhan University, Wuhan, Hubei 430071, PR China
| | - Ruifang Li
- Department of Neurology, Hubei third people's Hospital, Wuhan, Hubei 430033, PR China
| | - Fangfang Zhu
- Department of Intensive Care Unit, Zhongnan Hospital of Wuhan University, Wuhan, Hubei 430071, PR China
| | - Wenjuan Xu
- Department of Respiratory Medicine, Zhongnan Hospital of Wuhan University, 169 Donghu Road, Wuhan, Hubei 430071, PR China
| | - Gan Zha
- Department of Respiratory Medicine, People's Hospital of Wuhan University, Wuhan, Hubei 430060, PR China
| | - Guangzhen He
- Department of Respiratory Medicine, Zhongnan Hospital of Wuhan University, 169 Donghu Road, Wuhan, Hubei 430071, PR China
| | - Huan Cao
- Department of Respiratory Medicine, Zhongnan Hospital of Wuhan University, 169 Donghu Road, Wuhan, Hubei 430071, PR China
| | - Yimin Wang
- Department of Respiratory Medicine, Zhongnan Hospital of Wuhan University, 169 Donghu Road, Wuhan, Hubei 430071, PR China
| | - Jiong Yang
- Department of Respiratory Medicine, Zhongnan Hospital of Wuhan University, 169 Donghu Road, Wuhan, Hubei 430071, PR China.
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18
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Yang M, Li Y, Wang Y, Cheng N, Zhang Y, Pang S, Shen Q, Zhao L, Li G, Zhu G. The effects of lead exposure on the expression of HMGB1 and HO-1 in rats and PC12 cells. Toxicol Lett 2018; 288:111-118. [PMID: 29447957 DOI: 10.1016/j.toxlet.2018.02.010] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2017] [Revised: 01/11/2018] [Accepted: 02/04/2018] [Indexed: 12/11/2022]
Abstract
Lead (Pb) is an environmental neurotoxic metal. Chronic exposure to Pb causes deficits of learning and memory in children and spatial learning deficits in developing rats. In this study we investigated the effects of Pb exposure on the expression of HMGB1 and HO-1 in rats and PC12 cells. The animals were randomly divided to three groups: control group; low lead exposure group; high lead exposure group; PC12 cells were divided into 3 groups: 0 μM (control group), 1 μM and 100 μM Pb acetate. The results showed that Pb levels in blood and brain of Pb exposed groups were significantly higher than that of the control group (p < 0.05). The expression of HMGB1 and HO-1 were increased in Pb exposed groups than that of the control group (p < 0.05). Moreover, we found that the up-regulation of HO-1 in Pb exposure environment inhibited the expression of HMGB1.
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Affiliation(s)
- Meiyuan Yang
- Department of Anatomy, School of Basic Medicine, Nanchang University, BaYi Road 461, Nanchang, 330006, PR China
| | - Yaobin Li
- Department of Anatomy, School of Basic Medicine, Nanchang University, BaYi Road 461, Nanchang, 330006, PR China
| | - Ying Wang
- Queen Marry College, School of Medicine, Nanchang University, BaYi Road 461, Nanchang, 330006, PR China
| | - Nuo Cheng
- Queen Marry College, School of Medicine, Nanchang University, BaYi Road 461, Nanchang, 330006, PR China
| | - Yi Zhang
- Queen Marry College, School of Medicine, Nanchang University, BaYi Road 461, Nanchang, 330006, PR China
| | - Shimin Pang
- Second Clinical College, School of Medicine, Nanchang University, BaYi Road 461, Nanchang, 330006, PR China
| | - Qiwei Shen
- Second Clinical College, School of Medicine, Nanchang University, BaYi Road 461, Nanchang, 330006, PR China
| | - Lijuan Zhao
- Second Clinical College, School of Medicine, Nanchang University, BaYi Road 461, Nanchang, 330006, PR China
| | - Guilin Li
- Department of Physiology, School of Basic Medicine, Nanchang University, BaYi Road 461, Nanchang 330006, PR China
| | - Gaochun Zhu
- Department of Anatomy, School of Basic Medicine, Nanchang University, BaYi Road 461, Nanchang, 330006, PR China.
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19
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HMGB1 silencing in macrophages prevented their functional skewing and ameliorated EAM development: Nuclear HMGB1 may be a checkpoint molecule of macrophage reprogramming. Int Immunopharmacol 2018; 56:277-284. [PMID: 29414662 DOI: 10.1016/j.intimp.2018.01.013] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2017] [Revised: 01/04/2018] [Accepted: 01/06/2018] [Indexed: 12/31/2022]
Abstract
High-mobility group box 1 (HMGB1), an important inflammatory factor, plays significant roles in CD4+T cell differentiation, cancer and autoimmune disease development. Our previous data have demonstrated that HMGB1 contributes to macrophage reprogramming and is involved in experimental autoimmune myocarditis (EAM) development. In contrast to the well-explored function of HMGB1, little is known about the nuclear function. Whether HMGB1 can serve as an architectural factor and control functional skewing of macrophages remains unclear. Therefore, the present work was performed to address the above speculation. The adenovirus-mediated shRNA (Ad-shRNA) was employed to knock down HMGB1 in RAW264.7 and monocytes/macrophages of EAM mice. Our data showed that in vitro HMGB1 silencing limited functional skewing of macrophages and down-regulated inflammatory factors secretion, which can't be reversed by the exogenous HMGB1. In M1 polarization system, the phosphorylations of NF-κB, p38 and Erk1/2 were inhibited following HMGB1 silencing. In vivo, HMGB1 silencing could effectively ameliorate EAM development. Our data suggest that HMGB1 may be a checkpoint nuclear factor of macrophage reprogramming. Our findings also provide an exciting therapeutic method for inflammatory disorders.
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20
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Alassane-Kpembi I, Gerez JR, Cossalter AM, Neves M, Laffitte J, Naylies C, Lippi Y, Kolf-Clauw M, Bracarense APL, Pinton P, Oswald IP. Intestinal toxicity of the type B trichothecene mycotoxin fusarenon-X: whole transcriptome profiling reveals new signaling pathways. Sci Rep 2017; 7:7530. [PMID: 28790326 PMCID: PMC5548841 DOI: 10.1038/s41598-017-07155-2] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2017] [Accepted: 06/23/2017] [Indexed: 12/02/2022] Open
Abstract
The few data available on fusarenon-X (FX) do not support the derivation of health-based guidance values, although preliminary results suggest higher toxicity than other regulated trichothecenes. Using histo-morphological analysis and whole transcriptome profiling, this study was designed to obtain a global view of the intestinal alterations induced by FX. Deoxynivalenol (DON) served as a benchmark. FX induced more severe histological alterations than DON. Inflammation was the hallmark of the molecular toxicity of both mycotoxins. The benchmark doses for the up-regulation of key inflammatory genes by FX were 4- to 45-fold higher than the previously reported values for DON. The transcriptome analysis revealed that both mycotoxins down-regulated the peroxisome proliferator-activated receptor (PPAR) and liver X receptor - retinoid X receptor (LXR-RXR) signaling pathways that control lipid metabolism. Interestingly, several pathways, including VDR/RXR activation, ephrin receptor signaling, and GNRH signaling, were specific to FX and thus discriminated the transcriptomic fingerprints of the two mycotoxins. These results demonstrate that FX induces more potent intestinal inflammation than DON. Moreover, although the mechanisms of toxicity of both mycotoxins are similar in many ways, this study emphasize specific pathways targeted by each mycotoxin, highlighting the need for specific mechanism-based risk assessments of Fusarium mycotoxins.
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Affiliation(s)
- Imourana Alassane-Kpembi
- Toxalim, Research Center in Food Toxicology, Université de Toulouse, INRA, ENVT, INP- PURPAN, UPS, F-31027, Toulouse, France
- Hôpital d'Instruction des Armées, Camp Guézo, 01BP517, Cotonou, Benin
| | - Juliana Rubira Gerez
- Toxalim, Research Center in Food Toxicology, Université de Toulouse, INRA, ENVT, INP- PURPAN, UPS, F-31027, Toulouse, France
- Laboratory of Animal Pathology, Department of Veterinary Preventive Medicine, Universidade Estadual de Londrina, Londrina, Paraná, Brazil
| | - Anne-Marie Cossalter
- Toxalim, Research Center in Food Toxicology, Université de Toulouse, INRA, ENVT, INP- PURPAN, UPS, F-31027, Toulouse, France
| | - Manon Neves
- Toxalim, Research Center in Food Toxicology, Université de Toulouse, INRA, ENVT, INP- PURPAN, UPS, F-31027, Toulouse, France
| | - Joëlle Laffitte
- Toxalim, Research Center in Food Toxicology, Université de Toulouse, INRA, ENVT, INP- PURPAN, UPS, F-31027, Toulouse, France
| | - Claire Naylies
- Toxalim, Research Center in Food Toxicology, Université de Toulouse, INRA, ENVT, INP- PURPAN, UPS, F-31027, Toulouse, France
| | - Yannick Lippi
- Toxalim, Research Center in Food Toxicology, Université de Toulouse, INRA, ENVT, INP- PURPAN, UPS, F-31027, Toulouse, France
| | - Martine Kolf-Clauw
- Toxalim, Research Center in Food Toxicology, Université de Toulouse, INRA, ENVT, INP- PURPAN, UPS, F-31027, Toulouse, France
- Université de Toulouse, Ecole Nationale Vétérinaire (ENVT), Toulouse, France
| | - Ana Paula L Bracarense
- Laboratory of Animal Pathology, Department of Veterinary Preventive Medicine, Universidade Estadual de Londrina, Londrina, Paraná, Brazil
| | - Philippe Pinton
- Toxalim, Research Center in Food Toxicology, Université de Toulouse, INRA, ENVT, INP- PURPAN, UPS, F-31027, Toulouse, France
| | - Isabelle P Oswald
- Toxalim, Research Center in Food Toxicology, Université de Toulouse, INRA, ENVT, INP- PURPAN, UPS, F-31027, Toulouse, France.
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21
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Li C, Peng S, Liu X, Han C, Wang X, Jin T, Liu S, Wang W, Xie X, He X, Zhang H, Shan L, Fan C, Shan Z, Teng W. Glycyrrhizin, a Direct HMGB1 Antagonist, Ameliorates Inflammatory Infiltration in a Model of Autoimmune Thyroiditis via Inhibition of TLR2-HMGB1 Signaling. Thyroid 2017; 27:722-731. [PMID: 28363255 DOI: 10.1089/thy.2016.0432] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
BACKGROUND High mobility group box-1 (HMGB1), a non-histone protein, plays an important role in autoimmune diseases. However, the significance of HMGB1 in the pathogenesis of autoimmune thyroiditis has not been reported. The purpose of this study was to explore whether HMGB1 participates in the pathogenesis of autoimmune thyroiditis, and whether glycyrrhizin (GL), a direct inhibitor of HMGB1, attenuates the severity of thyroid inflammatory infiltration in a murine model of autoimmune thyroiditis. METHODS A total of 80 male NOD.H-2h4 mice were randomly divided into a control or iodine supplement (NaI) group at four weeks of age, and the control group was fed with regular water, whereas the NaI group was supplied with 0.005% sodium iodine water. Another 24 male NOD.H-2h4 mice were also randomized into three groups (eight mice per group) as follows: control, NaI, and GL treatment after iodine supplementation (NaI + GL). The NOD.H-2h4 mice were fed with 0.005% sodium iodide water for eight weeks to enhance autoimmune thyroiditis. After iodine treatment, the mice received intraperitoneal injections of GL for four weeks. The severity of lymphocytic infiltration in the thyroid gland was measured by histopathological studies. The serum levels of HMGB1, tumor necrosis factor alpha, interleukin (IL)-6, IL-1β, and thyroglobulin antibody titers were measured using an enzyme-linked immunosorbent assay. HMGB1 expression was measured by immunohistochemical staining and real-time polymerase chain reaction. TLR2, HMGB1, MyD88, and nuclear transcription factor κB were measured by Western blot. RESULTS The mRNA expression of HMGB1 was significantly higher at 8 and 16 weeks in the NaI group than it was in the control group. Serum levels of thyroglobulin antibodies, HMGB1, tumor necrosis factor alpha, IL-6, and IL-1β were significantly increased in the NaI group, but they were dramatically attenuated with GL injection. The prevalence of thyroiditis and the infiltration of lymphocytes were significantly decreased in the NaI + GL group. GL administration also significantly reduced the protein expression of TLR2, MyD88, HMGB1 and nuclear transcription factor κB in the thyroid gland and attenuated the severity of thyroiditis. CONCLUSION HMGB1 may play a crucial role in autoimmune thyroiditis by causing inflammatory infiltration, thus increasing the severity of autoimmune thyroiditis. GL effectively attenuated thyroiditis in the iodine-induced NOD.H-2h4 mice via a molecular mechanism related to the inhibition of TLR2-HMGB1 signaling.
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Affiliation(s)
- Chenyan Li
- 1 Department of Endocrinology and Metabolism, Institute of Endocrinology, Liaoning Provincial Key Laboratory of Endocrine Diseases, The First Affiliated Hospital of China Medical University, China Medical University , Shenyang, People's Republic of China
| | - Shiqiao Peng
- 1 Department of Endocrinology and Metabolism, Institute of Endocrinology, Liaoning Provincial Key Laboratory of Endocrine Diseases, The First Affiliated Hospital of China Medical University, China Medical University , Shenyang, People's Republic of China
| | - Xin Liu
- 1 Department of Endocrinology and Metabolism, Institute of Endocrinology, Liaoning Provincial Key Laboratory of Endocrine Diseases, The First Affiliated Hospital of China Medical University, China Medical University , Shenyang, People's Republic of China
- 2 Department of Intensive Care Unit, Affiliated Hospital of Qingdao University , Qingdao, People's Republic of China
| | - Cheng Han
- 1 Department of Endocrinology and Metabolism, Institute of Endocrinology, Liaoning Provincial Key Laboratory of Endocrine Diseases, The First Affiliated Hospital of China Medical University, China Medical University , Shenyang, People's Republic of China
| | - Xinyi Wang
- 1 Department of Endocrinology and Metabolism, Institute of Endocrinology, Liaoning Provincial Key Laboratory of Endocrine Diseases, The First Affiliated Hospital of China Medical University, China Medical University , Shenyang, People's Republic of China
- 3 Department of Laboratory Medicine, The First Hospital of China Medical University , Shenyang, People's Republic of China
| | - Ting Jin
- 1 Department of Endocrinology and Metabolism, Institute of Endocrinology, Liaoning Provincial Key Laboratory of Endocrine Diseases, The First Affiliated Hospital of China Medical University, China Medical University , Shenyang, People's Republic of China
- 4 Department of Endocrinology, Sir Run Run Shaw Hospital, Affiliated to School of Medicine, Zhejiang University , Hangzhou, People's Republic of China
| | - Shanshan Liu
- 1 Department of Endocrinology and Metabolism, Institute of Endocrinology, Liaoning Provincial Key Laboratory of Endocrine Diseases, The First Affiliated Hospital of China Medical University, China Medical University , Shenyang, People's Republic of China
- 5 Department of Emergency, People's Liberation Army No.202 Hospital , Shenyang, People's Republic of China
| | - Weiwei Wang
- 1 Department of Endocrinology and Metabolism, Institute of Endocrinology, Liaoning Provincial Key Laboratory of Endocrine Diseases, The First Affiliated Hospital of China Medical University, China Medical University , Shenyang, People's Republic of China
| | - Xiaochen Xie
- 1 Department of Endocrinology and Metabolism, Institute of Endocrinology, Liaoning Provincial Key Laboratory of Endocrine Diseases, The First Affiliated Hospital of China Medical University, China Medical University , Shenyang, People's Republic of China
| | - Xue He
- 1 Department of Endocrinology and Metabolism, Institute of Endocrinology, Liaoning Provincial Key Laboratory of Endocrine Diseases, The First Affiliated Hospital of China Medical University, China Medical University , Shenyang, People's Republic of China
| | - Hanyi Zhang
- 1 Department of Endocrinology and Metabolism, Institute of Endocrinology, Liaoning Provincial Key Laboratory of Endocrine Diseases, The First Affiliated Hospital of China Medical University, China Medical University , Shenyang, People's Republic of China
| | - Ling Shan
- 1 Department of Endocrinology and Metabolism, Institute of Endocrinology, Liaoning Provincial Key Laboratory of Endocrine Diseases, The First Affiliated Hospital of China Medical University, China Medical University , Shenyang, People's Republic of China
| | - Chenling Fan
- 1 Department of Endocrinology and Metabolism, Institute of Endocrinology, Liaoning Provincial Key Laboratory of Endocrine Diseases, The First Affiliated Hospital of China Medical University, China Medical University , Shenyang, People's Republic of China
| | - Zhongyan Shan
- 1 Department of Endocrinology and Metabolism, Institute of Endocrinology, Liaoning Provincial Key Laboratory of Endocrine Diseases, The First Affiliated Hospital of China Medical University, China Medical University , Shenyang, People's Republic of China
| | - Weiping Teng
- 1 Department of Endocrinology and Metabolism, Institute of Endocrinology, Liaoning Provincial Key Laboratory of Endocrine Diseases, The First Affiliated Hospital of China Medical University, China Medical University , Shenyang, People's Republic of China
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22
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Friedenberg SG, Strange HR, Guillaumin J, VanGundy ZC, Crouser ED, Papenfuss TL. Effect of disrupted mitochondria as a source of damage-associated molecular patterns on the production of tumor necrosis factor α by splenocytes from dogs. Am J Vet Res 2017; 77:604-12. [PMID: 27227498 DOI: 10.2460/ajvr.77.6.604] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
OBJECTIVE To evaluate the effects of damage-associated molecular patterns (DAMPs) derived from disrupted mitochondria on canine splenocytes and other immune cells. SAMPLES Liver, spleen, and bone marrow samples obtained from 8 cadavers of healthy research Beagles that had been euthanized for other purposes. PROCEDURES Mitochondria were obtained from canine hepatocytes, and mitochondrial DAMPs (containing approx 75% mitochondrial proteins) were prepared. Mitochondrial DAMPs and the nuclear cytokine high-mobility group box protein 1 were applied to splenocytes, bone marrow-differentiated dendritic cells, and a canine myelomonocytic cell (DH82) line for 6 or 24 hours. Cell culture supernatants from splenocytes, dendritic cells, and DH82 cells were assayed for tumor necrosis factor α with an ELISA. Expression of tumor necrosis factor α mRNA in splenocytes was evaluated with a quantitative real-time PCR assay. RESULTS In all cell populations evaluated, production of tumor necrosis factor α was consistently increased by mitochondrial DAMPs at 6 hours (as measured by an ELISA). In contrast, high-mobility group box protein 1 did not have any independent proinflammatory effects in this experimental system. CONCLUSIONS AND CLINICAL RELEVANCE The study revealed an in vitro inflammatory effect of mitochondrial DAMPs (containing approx 75% mitochondrial proteins) in canine cells and validated the use of an in vitro splenocyte model to assess DAMP-induced inflammation in dogs. This experimental system may aid in understanding the contribution of DAMPs to sepsis and the systemic inflammatory response syndrome in humans. Further studies in dogs are needed to validate the biological importance of these findings and to evaluate the in vivo role of mitochondrial DAMPs in triggering and perpetuating systemic inflammatory states.
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23
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Appavoo E, Hajam IA, Muneeswaran NS, Kondabattula G, Bhanuprakash V, Kishore S. Synergistic effect of high-mobility group box-1 and lipopolysaccharide on cytokine induction in bovine peripheral blood mononuclear cells. Microbiol Immunol 2017; 60:196-202. [PMID: 26639899 DOI: 10.1111/1348-0421.12350] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2015] [Revised: 11/14/2015] [Accepted: 12/02/2015] [Indexed: 01/06/2023]
Abstract
High-mobility group box 1 (HMGB1) is one of the potent endogenous adjuvants released by necrotic and activated innate immune cells. HMGB1 modulates innate and adaptive immune responses in humans and mice by mediating immune cells crosstalk. However, the immuno-modulatory effects of HMGB1 in the bovine immune system are not clearly known. In this study, the effect of bovine HMGB1 alone or in combination with LPS on the expression kinetics of cytokines upon in vitro stimulation of bovine peripheral blood mononuclear cells (PBMCs) was investigated by quantitative PCR assay. The biological activity of bovine HMGB1 expressed in this prokaryotic expression system was confirmed by its ability to induce nitric oxide secretion in RAW 264.7 cells. The present results indicate that HMGB1 induces a more delayed TNF-α response than does LPS in stimulated PBMCs. However, IFN-γ, IFN-β and IL-12 mRNA transcription peaked at 6 hr post stimulation after both treatments. Further, HMGB1 and LPS heterocomplex up-regulated TNF-α, IFN-γ and IL-12 mRNA expression significantly than did individual TLR4 agonists. The heterocomplex also enhanced the expression of TLR4 on bovine PBMCs. In conclusion, the data indicate that HMGB1 and LPS act synergistically and enhance proinflammatory cytokines, thereby eliciting Th1 responses in bovine PBMCs. These results suggest that HMGB1 can act as an adjuvant in modulating the bovine immune system and thus lays a foundation for using HMGB1 as an adjuvant in various bovine vaccine preparations.
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Affiliation(s)
- Elamurugan Appavoo
- Foot and Mouth Disease Research Center, Indian Veterinary Research Institute, Bangalore 560024, India
| | - Irshad Ahmed Hajam
- Foot and Mouth Disease Research Center, Indian Veterinary Research Institute, Bangalore 560024, India
| | | | - Ganesh Kondabattula
- Foot and Mouth Disease Research Center, Indian Veterinary Research Institute, Bangalore 560024, India
| | | | - Subodh Kishore
- Foot and Mouth Disease Research Center, Indian Veterinary Research Institute, Bangalore 560024, India
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24
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Corrales L, Matson V, Flood B, Spranger S, Gajewski TF. Innate immune signaling and regulation in cancer immunotherapy. Cell Res 2017; 27:96-108. [PMID: 27981969 PMCID: PMC5223230 DOI: 10.1038/cr.2016.149] [Citation(s) in RCA: 255] [Impact Index Per Article: 36.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
A pre-existing T cell-inflamed tumor microenvironment has prognostic utility and also can be predictive for response to contemporary cancer immunotherapies. The generation of a spontaneous T cell response against tumor-associated antigens depends on innate immune activation, which drives type I interferon (IFN) production. Recent work has revealed a major role for the STING pathway of cytosolic DNA sensing in this process. This cascade of events contributes to the activation of Batf3-lineage dendritic cells (DCs), which appear to be central to anti-tumor immunity. Non-T cell-inflamed tumors lack chemokines for Batf3 DC recruitment, have few Batf3 DCs, and lack a type I IFN gene signature, suggesting that failed innate immune activation may be the ultimate cause for lack of spontaneous T cell activation and accumulation. With this information in hand, new strategies for triggering innate immune activation and Batf3 DC recruitment are being developed, including novel STING agonists for de novo immune priming. Ultimately, the successful development of effective innate immune activators should expand the fraction of patients that can respond to immunotherapies, such as with checkpoint blockade antibodies.
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Affiliation(s)
- Leticia Corrales
- Department of Pathology, The University of Chicago, 5841 S. Maryland Ave, MC2115, Chicago, IL 60637, USA
| | - Vyara Matson
- Department of Pathology, The University of Chicago, 5841 S. Maryland Ave, MC2115, Chicago, IL 60637, USA
| | - Blake Flood
- Department of Pathology, The University of Chicago, 5841 S. Maryland Ave, MC2115, Chicago, IL 60637, USA
| | - Stefani Spranger
- Department of Pathology, The University of Chicago, 5841 S. Maryland Ave, MC2115, Chicago, IL 60637, USA
| | - Thomas F Gajewski
- Department of Pathology, The University of Chicago, 5841 S. Maryland Ave, MC2115, Chicago, IL 60637, USA
- Department of Medicine, Section of Hematology/Oncology, The University of Chicago, Chicago, IL, USA
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25
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Mazur-Bialy AI, Pocheć E. Riboflavin Reduces Pro-Inflammatory Activation of Adipocyte-Macrophage Co-culture. Potential Application of Vitamin B2 Enrichment for Attenuation of Insulin Resistance and Metabolic Syndrome Development. Molecules 2016; 21:molecules21121724. [PMID: 27983705 PMCID: PMC6273179 DOI: 10.3390/molecules21121724] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2016] [Revised: 12/04/2016] [Accepted: 12/09/2016] [Indexed: 12/15/2022] Open
Abstract
Due to the progressive increase in the incidence of obese and overweight individuals, cardiometabolic syndrome has become a worldwide pandemic in recent years. Given the immunomodulatory properties of riboflavin, the current study was performed to investigate the potency of riboflavin in reducing obesity-related inflammation, which is the main cause of insulin resistance, diabetes mellitus 2 or arteriosclerosis. We determined whether pretreatment with a low dose of riboflavin (10.4–1000 nM) affected the pro-inflammatory activity of adipocyte-macrophage co-culture (3T3 L1-RAW 264.7) following lipopolysaccharide stimulation (LPS; 100 ng/mL) which mimics obesity-related inflammation. The apoptosis of adipocytes and macrophages as well as tumor necrosis factor-alpha (TNF-α), interleukin 6 (IL-6), interleukin 1beta (IL-1β), monocyte chemotactic protein 1 (MCP-1), high-mobility group box 1 (HMGB1), transforming growth factor–beta 1 (TGFβ), interleukin 10 (IL-10), inducible nitric oxide synthase (iNOS), nitric oxide (NO), matrix metalloproteinase 9 (MMP-9), tissue inhibitor of metalloproteinases-1 (TIMP-1) expression and release, macrophage migration and adipokines (adiponectin and leptin) were determined. Our results indicated an efficient reduction in pro-inflammatory factors (TNFα, IL-6, MCP-1, HMGB1) upon culture with riboflavin supplementation (500–1000 nM), accompanied by elevation in anti-inflammatory adiponectin and IL-10. Moreover, macrophage migration was reduced by the attenuation of chemotactic MCP-1 release and degradation of the extracellular matrix by MMP-9. In conclusion, riboflavin effectively inhibits the pro-inflammatory activity of adipocyte and macrophage co-cultures, and therefore we can assume that its supplementation may reduce the likelihood of conditions associated with the mild inflammation linked to obesity.
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Affiliation(s)
- Agnieszka Irena Mazur-Bialy
- Department of Ergonomics and Exercise Physiology, Faculty of Health Science, Jagiellonian University Medical College, Grzegorzecka 20, 31-531 Krakow, Poland.
| | - Ewa Pocheć
- Department of Glycoconjugate Biochemistry, Institute of Zoology, Jagiellonian University, Gronostajowa 9, 30-387 Krakow, Poland.
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26
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Rouhiainen A, Zhao X, Vanttola P, Qian K, Kulesskiy E, Kuja-Panula J, Gransalke K, Grönholm M, Unni E, Meistrich M, Tian L, Auvinen P, Rauvala H. HMGB4 is expressed by neuronal cells and affects the expression of genes involved in neural differentiation. Sci Rep 2016; 6:32960. [PMID: 27608812 PMCID: PMC5036535 DOI: 10.1038/srep32960] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2015] [Accepted: 08/18/2016] [Indexed: 12/21/2022] Open
Abstract
HMGB4 is a new member in the family of HMGB proteins that has been characterized in sperm cells, but little is known about its functions in somatic cells. Here we show that HMGB4 and the highly similar rat Transition Protein 4 (HMGB4L1) are expressed in neuronal cells. Both proteins had slow mobility in nucleus of living NIH-3T3 cells. They interacted with histones and their differential expression in transformed cells of the nervous system altered the post-translational modification statuses of histones in vitro. Overexpression of HMGB4 in HEK 293T cells made cells more susceptible to cell death induced by topoisomerase inhibitors in an oncology drug screening array and altered variant composition of histone H3. HMGB4 regulated over 800 genes in HEK 293T cells with a p-value ≤0.013 (n = 3) in a microarray analysis and displayed strongest association with adhesion and histone H2A –processes. In neuronal and transformed cells HMGB4 regulated the expression of an oligodendrocyte marker gene PPP1R14a and other neuronal differentiation marker genes. In conclusion, our data suggests that HMGB4 is a factor that regulates chromatin and expression of neuronal differentiation markers.
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Affiliation(s)
- Ari Rouhiainen
- Neuroscience center, University of Helsinki, Finland.,Department of Biosciences, University of Helsinki, Finland
| | - Xiang Zhao
- Neuroscience center, University of Helsinki, Finland.,Schools of Pharmacy and Medicine, Department of Bioengineering and Therapeutic Sciences, University of California, San Francisco, California, USA
| | | | - Kui Qian
- Institute of Biotechnology, University of Helsinki, Finland
| | - Evgeny Kulesskiy
- Neuroscience center, University of Helsinki, Finland.,Institute for Molecular Medicine Finland, FIMM, University of Helsinki, Finland
| | | | | | | | - Emmanual Unni
- Department of Biochemistry, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Marvin Meistrich
- Department of Experimental Radiation Oncology, Division of Radiation Oncology, MD Anderson Cancer Center, Houston, Texas, USA
| | - Li Tian
- Neuroscience center, University of Helsinki, Finland.,Psychiatry Research Center, Beijing Hui Long Guan Hospital, Peking University, Beijing, China
| | - Petri Auvinen
- Institute of Biotechnology, University of Helsinki, Finland
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27
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HMGB1, IL-1α, IL-33 and S100 proteins: dual-function alarmins. Cell Mol Immunol 2016; 14:43-64. [PMID: 27569562 PMCID: PMC5214941 DOI: 10.1038/cmi.2016.34] [Citation(s) in RCA: 308] [Impact Index Per Article: 38.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2016] [Revised: 05/16/2016] [Accepted: 05/17/2016] [Indexed: 02/08/2023] Open
Abstract
Our immune system is based on the close collaboration of the innate and adaptive immune systems for the rapid detection of any threats to the host. Recognition of pathogen-derived molecules is entrusted to specific germline-encoded signaling receptors. The same receptors have now also emerged as efficient detectors of misplaced or altered self-molecules that signal tissue damage and cell death following, for example, disruption of the blood supply and subsequent hypoxia. Many types of endogenous molecules have been shown to provoke such sterile inflammatory states when released from dying cells. However, a group of proteins referred to as alarmins have both intracellular and extracellular functions which have been the subject of intense research. Indeed, alarmins can either exert beneficial cell housekeeping functions, leading to tissue repair, or provoke deleterious uncontrolled inflammation. This group of proteins includes the high-mobility group box 1 protein (HMGB1), interleukin (IL)-1α, IL-33 and the Ca2+-binding S100 proteins. These dual-function proteins share conserved regulatory mechanisms, such as secretory routes, post-translational modifications and enzymatic processing, that govern their extracellular functions in time and space. Release of alarmins from mesenchymal cells is a highly relevant mechanism by which immune cells can be alerted of tissue damage, and alarmins play a key role in the development of acute or chronic inflammatory diseases and in cancer development.
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28
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Laursen TL, Støy S, Deleuran B, Vilstrup H, Grønbaek H, Sandahl TD. The damage-associated molecular pattern HMGB1 is elevated in human alcoholic hepatitis, but does not seem to be a primary driver of inflammation. APMIS 2016; 124:741-7. [DOI: 10.1111/apm.12568] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2016] [Accepted: 05/18/2016] [Indexed: 01/14/2023]
Affiliation(s)
- Tea Lund Laursen
- Department of Hepatology and Gastroenterology; Aarhus University Hospital; Aarhus Denmark
| | - Sidsel Støy
- Department of Hepatology and Gastroenterology; Aarhus University Hospital; Aarhus Denmark
| | - Bent Deleuran
- Department of Biomedicine; Aarhus University; Aarhus Denmark
| | - Hendrik Vilstrup
- Department of Hepatology and Gastroenterology; Aarhus University Hospital; Aarhus Denmark
| | - Henning Grønbaek
- Department of Hepatology and Gastroenterology; Aarhus University Hospital; Aarhus Denmark
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29
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Martin SJ. Cell death and inflammation: the case for IL-1 family cytokines as the canonical DAMPs of the immune system. FEBS J 2016; 283:2599-615. [PMID: 27273805 DOI: 10.1111/febs.13775] [Citation(s) in RCA: 131] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2016] [Revised: 05/31/2016] [Accepted: 06/06/2016] [Indexed: 02/07/2023]
Abstract
It is well known that necrotic cells are capable of promoting inflammation through releasing so-called endogenous 'danger signals' that can promote activation of macrophages, dendritic cells, and other sentinel cells of the innate immune system. However, the identity of these endogenous proinflammatory molecules, also called damage-associated molecular patterns (DAMPs), has been debated since the 'danger model' was first advanced 20 years ago. While a relatively large number of molecules have been proposed to act as DAMPs, little consensus has emerged concerning which of these represent the key activators of sterile inflammation. Here I argue that the canonical DAMPs have long been hiding in plain sight, in the form of members of the extended IL-1 cytokine family (IL-1α, IL-1β, IL-18, IL-33, IL-36α, IL-36β, and IL-36γ). The latter cytokines possess all of the characteristics expected of endogenous DAMPs and initiate inflammation in a manner strikingly similar to that utilized by the other major category of inflammatory triggers, pathogen-associated molecular patterns (PAMPs). Furthermore, many PAMPs upregulate the expression of IL-1 family DAMPs, enabling robust synergy between these distinct classes of inflammatory triggers. Thus, multiple lines of evidence now suggest that IL-1 family cytokines represent the key initiators of necrosis-initiated sterile inflammation, as well as amplifiers of inflammation in response to infection-associated tissue injury.
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Affiliation(s)
- Seamus J Martin
- Department of Genetics, Molecular Cell Biology Laboratory, The Smurfit Institute, Trinity College, Dublin 2, Ireland
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30
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Adiponectin Inhibits LPS-Induced HMGB1 Release through an AMP Kinase and Heme Oxygenase-1-Dependent Pathway in RAW 264 Macrophage Cells. Mediators Inflamm 2016; 2016:5701959. [PMID: 27313399 PMCID: PMC4904123 DOI: 10.1155/2016/5701959] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2016] [Accepted: 05/10/2016] [Indexed: 12/30/2022] Open
Abstract
High mobility group protein B1 (HMGB1) is a late inflammatory mediator that exaggerates septic symptoms. Adiponectin, an adipokine, has potent anti-inflammatory properties. However, possible effects of adiponectin on lipopolysaccharide- (LPS-) induced HMGB1 release are unknown. The aim of this study was to investigate effects of full length adiponectin on HMGB1 release in LPS-stimulated RAW 264 macrophage cells. Treatment of the cells with LPS alone significantly induced HMGB1 release associated with HMGB1 translocation from the nucleus to the cytosol. However, prior treatment with adiponectin suppressed LPS-induced HMGB1 release and translocation. The anti-inflammatory cytokine interleukin- (IL-) 10 similarly suppressed LPS-induced HMGB1 release. Adiponectin treatment decreased toll-like receptor 4 (TLR4) mRNA expression and increased heme oxygenase- (HO-) 1 mRNA expression without inducing IL-10 mRNA, while IL-10 treatment decreased TLR2 and HMGB1 mRNA expression and increased the expression of IL-10 and HO-1 mRNA. Treatment with the HO-1 inhibitor ZnPP completely prevented the suppression of HMGB1 release by adiponectin but only partially inhibited that induced by IL-10. Treatment with compound C, an AMP kinase (AMPK) inhibitor, abolished the increase in HO-1 expression and the suppression of HMGB1 release mediated by adiponectin. In conclusion, our results indicate that adiponectin suppresses HMGB1 release by LPS through an AMPK-mediated and HO-1-dependent IL-10-independent pathway.
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31
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Boyapati RK, Rossi AG, Satsangi J, Ho GT. Gut mucosal DAMPs in IBD: from mechanisms to therapeutic implications. Mucosal Immunol 2016; 9:567-82. [PMID: 26931062 DOI: 10.1038/mi.2016.14] [Citation(s) in RCA: 91] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2015] [Accepted: 12/31/2015] [Indexed: 02/06/2023]
Abstract
Endogenous damage-associated molecular patterns (DAMPs) are released during tissue damage and have increasingly recognized roles in the etiology of many human diseases. The inflammatory bowel diseases (IBD), ulcerative colitis (UC) and Crohn's disease (CD), are immune-mediated conditions where high levels of DAMPs are observed. DAMPs such as calprotectin (S100A8/9) have an established clinical role as a biomarker in IBD. In this review, we use IBD as an archetypal common chronic inflammatory disease to focus on the conceptual and evidential importance of DAMPs in pathogenesis and why DAMPs represent an entirely new class of targets for clinical translation.
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Affiliation(s)
- R K Boyapati
- MRC Centre for Inflammation Research, Queens Medical Research Institute, Edinburgh, UK.,Gastrointestinal Unit, Institute of Genetics and Molecular Medicine, Western General Hospital, University of Edinburgh, Edinburgh, UK
| | - A G Rossi
- MRC Centre for Inflammation Research, Queens Medical Research Institute, Edinburgh, UK
| | - J Satsangi
- Gastrointestinal Unit, Institute of Genetics and Molecular Medicine, Western General Hospital, University of Edinburgh, Edinburgh, UK
| | - G-T Ho
- MRC Centre for Inflammation Research, Queens Medical Research Institute, Edinburgh, UK.,Gastrointestinal Unit, Institute of Genetics and Molecular Medicine, Western General Hospital, University of Edinburgh, Edinburgh, UK
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32
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Prikhodko AS, Shabanov AK, Zinovkina LA, Popova EN, Aznauryan MA, Lanina NO, Vitushkina MV, Zinovkin RA. Pure Mitochondrial DNA Does Not Activate Human Neutrophils in vitro. BIOCHEMISTRY (MOSCOW) 2016; 80:629-35. [PMID: 26071783 DOI: 10.1134/s0006297915050168] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Excessive activation of the innate immune system often leads to fatal consequences and can be considered as one of the phenoptotic events. After traumatic injury, various components of mitochondria are released into the circulation and stimulate myeloid cells of the innate immunity. Presumably, mitochondrial DNA (mtDNA) might activate immune cells (Zhang, Q., et al. (2010) Nature, 464, 104-107). In the present study, we investigated the role of mtDNA as a direct activator of human neutrophils, as well as a prognostic marker in patients with severe trauma. Quantitative determination of mtDNA in the plasma of these patients revealed its significant increase (p < 0.02) in the group of survivors compared to non-survivors. Highly purified mtDNA was not able to induce activation of human neutrophils, thus possibly indicating the existence of additional factor(s) ensuring the recognition of mtDNA as a damage-associated molecular pattern.
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Affiliation(s)
- A S Prikhodko
- Faculty of Bioengineering and Bioinformatics, Lomonosov Moscow State University, Moscow, 119991, Russia
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33
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Nobiletin: A Citrus Isolate to Make Sepsis Less Sour. Inflammation 2016; 39:1274-6. [PMID: 26897369 DOI: 10.1007/s10753-016-0319-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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34
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rhHMGB1 drives osteoblast migration in a TLR2/TLR4- and NF-κB-dependent manner. Biosci Rep 2016; 36:e00300. [PMID: 26744383 PMCID: PMC4759610 DOI: 10.1042/bsr20150239] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2015] [Accepted: 01/06/2016] [Indexed: 02/02/2023] Open
Abstract
Osteoblast migration is significant in skeletal development. Recently, high mobility group box 1 protein (HMGB1) has been shown to highly expressed in cartilage to regulate endochondral ossification. Nevertheless, whether HMGB1 can modulate osteoblast proliferation and migration is poorly understood, as well as the intracellular signalling pathways that are involved in this process. Herein, we examined the effects of recombinant human HMGB1 (rhHMGB1) on the proliferation and migration of rat osteoblasts and investigated whether Toll-like receptor 2 (TLR2)- and TLR4-dependent signalling pathways are involved in the regulation of intracellular signalling. A transwell chamber assay was used to evaluate the migration of osteoblasts and the MTT assay was used to assess osteoblast proliferation. rhHMGB1 could significantly promote the migration of osteoblasts without inhibiting their proliferation. Meanwhile, rhHMGB1 can increase the nuclear translocation of nuclear factor-kappa B (NF-κB) p65. Specific siRNA constructs that target TLR2 or TLR4 could markedly inhibit HMGB1-induced migration of osteoblasts and HMGB1-enhanced activation of NF-κB. Collectively, HMGB1 could significantly enhance the migration of osteoblasts in vitro, and TLR2/TLR4-dependent NF-κB pathways are involved in HMGB1-induced osteoblast migration.
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35
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Zeng W, Shan W, Gao L, Gao D, Hu Y, Wang G, Zhang N, Li Z, Tian X, Xu W, Peng J, Ma X, Yao J. Inhibition of HMGB1 release via salvianolic acid B-mediated SIRT1 up-regulation protects rats against non-alcoholic fatty liver disease. Sci Rep 2015; 5:16013. [PMID: 26525891 PMCID: PMC4630617 DOI: 10.1038/srep16013] [Citation(s) in RCA: 86] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2015] [Accepted: 10/07/2015] [Indexed: 12/12/2022] Open
Abstract
The inflammatory mediator high-mobility group box 1 (HMGB1) plays a critical role in the pathogenesis of non-alcoholic fatty liver disease (NAFLD). However, the regulation of HMGB1 in NAFLD, particularly through sirtuin 1 (SIRT1), remains unclear. In this study, we investigated the role of SIRT1-mediated inhibition of HMGB1 release in NAFLD and the effect of salvianolic acid B (SalB), which is a water-soluble phenolic acid extracted from Radix Salvia miltiorrhiza, on NAFLD through SIRT1/HMGB1 signaling. In vivo, SalB treatment significantly attenuated high-fat diet (HFD)-induced liver damage, hepatic steatosis, and inflammation. Importantly, SalB significantly inhibited HMGB1 nuclear translocation and release, accompanied by SIRT1 elevation. In HepG2 cells, palmitic acid (PA)-induced pro-inflammatory cytokines release were blocked by HMGB1 small interfering RNA (siRNA) transfection. Moreover, pharmacological SIRT1 inhibition by Ex527 induced HMGB1 translocation and release, whereas SIRT1 activation by resveratrol or SalB reversed this trend. SIRT1 siRNA abrogated the SalB-mediated inhibition of HMGB1 acetylation and release, suggesting that SalB-mediated protection occurs by SIRT1 targeting HMGB1 for deacetylation. We are the first to demonstrate that the SIRT1/HMGB1 pathway is a key therapeutic target for controlling NAFLD inflammation and that SalB confers protection against HFD- and PA-induced hepatic steatosis and inflammation through SIRT1-mediated HMGB1 deacetylation.
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Affiliation(s)
- Wenjing Zeng
- Department of Pharmacology, Dalian Medical University, Dalian, 116044, China
| | - Wen Shan
- Department of Pharmacology, Dalian Medical University, Dalian, 116044, China
| | - Lili Gao
- Department of Pharmacology, Dalian Medical University, Dalian, 116044, China
| | - Dongyan Gao
- Department of Pharmacology, Dalian Medical University, Dalian, 116044, China
| | - Yan Hu
- Department of Pharmacy, Second Affiliated Hospital of Dalian Medical University, Dalian, 116023, China
| | - Guangzhi Wang
- Department of General Surgery, Second Affiliated Hospital of Dalian Medical University, Dalian, 116023, China
| | - Ning Zhang
- Department of Pharmacy, Second Affiliated Hospital of Dalian Medical University, Dalian, 116023, China
| | - Zhenlu Li
- Department of General Surgery, Second Affiliated Hospital of Dalian Medical University, Dalian, 116023, China
| | - Xiaofeng Tian
- Department of General Surgery, Second Affiliated Hospital of Dalian Medical University, Dalian, 116023, China
| | - Wei Xu
- Department of General Surgery, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Jinyong Peng
- Department of Pharmacology, Dalian Medical University, Dalian, 116044, China
| | - Xiaochi Ma
- Department of Pharmacology, Dalian Medical University, Dalian, 116044, China
| | - Jihong Yao
- Department of Pharmacology, Dalian Medical University, Dalian, 116044, China
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36
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Wang C, de Souza AW, Westra J, Bijl M, Chen M, Zhao MH, Kallenberg CG. Emerging role of high mobility group box 1 in ANCA-associated vasculitis. Autoimmun Rev 2015. [DOI: 10.1016/j.autrev.2015.07.010] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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37
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Xue R, Xu J, Ma S, Jia Z, Yang J. High-mobility group box 1 is involved in the development of benign prostatic hyperplasia with chronic prostatic inflammation. Scand J Urol 2015; 49:479-485. [PMID: 26143661 DOI: 10.3109/21681805.2015.1059357] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
OBJECTIVE The aims of this study were to explore the role of high-mobility group box 1 (HMGB1) in benign prostatic hyperplasia (BPH) and to perform a preliminary investigation of the mechanisms underlying BPH. MATERIALS AND METHODS HMGB1 expression in 160 BPH cases was analyzed using immunohistochemistry. HMGB1 expression in primary prostate epithelial cells and the concentration of HMGB1 in the surrounding culture medium were detected by Western blotting and enzyme-linked immunosorbent assay, respectively. Cell proliferation was evaluated by the carboxyfluorescein succinimidyl ester (CFSE) dilution assay. Student's t test or a one- or two-way analysis of variance test, followed by Bonferroni post hoc analysis, were used to test differences between groups and time-course data. RESULTS HMGB1 expression was higher in BPH with prostatitis than in BPH alone and was positively correlated with prostate volume in BPH patients with prostatitis, but not in BPH patients without prostatitis. HMGB1 expression in primary prostate epithelial cells as well as its release into the extracellular environment increased when the cells were treated with the proinflammatory molecule lipopolysaccharide (LPS). In addition, HMGB1 overexpression promoted the proliferation of primary prostate epithelial cells under LPS stimulation, and this could be inhibited by the HMGB1 antagonist boxA. CONCLUSIONS These findings provide novel insights into the pathogenic role of HMGB1 in BPH with prostatitis, and suggest that HMGB1 is a potential biomarker and therapeutic target for BPH.
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Affiliation(s)
- Rui Xue
- a 1 Department of Urology.,b 2 Institute of Clinical Medicine
| | | | - Shengli Ma
- d 4 Emergency Department, First Affiliated Hospital of Zhengzhou University, Zhengzhou, PR China
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Basta G, Turco SD, Navarra T, Lee WM. Circulating levels of soluble receptor for advanced glycation end products and ligands of the receptor for advanced glycation end products in patients with acute liver failure. Liver Transpl 2015; 21:847-54. [PMID: 25825217 PMCID: PMC4933521 DOI: 10.1002/lt.24129] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/17/2014] [Revised: 03/17/2015] [Accepted: 03/20/2015] [Indexed: 12/24/2022]
Abstract
Animal studies suggest that receptor for advanced glycation end products (RAGE)-dependent mechanisms contribute to acetaminophen-induced liver damage. We examined whether circulating levels of soluble receptor for advanced glycation end products (sRAGE) or RAGE ligands, including extracellular newly identified receptor for advanced glycation end products binding protein (EN-RAGE), high-mobility group box 1 (HMGB1), and Nε-(Carboxymethyl)lysine adducts (CML), could aid in prognostication after an acetaminophen overdose. Sixty well-characterized acetaminophen-related acute liver failure (ALF) patients (30 spontaneous survivors and 30 patients who underwent transplantation and/or died) who were enrolled in the National Institutes of Health-sponsored Acute Liver Failure Study Group, were matched by age, met standard criteria for encephalopathy, and had an international normalized ratio > 1.5 were retrospectively studied. HMGB1, EN-RAGE, CML, and sRAGE were detected by enzyme-linked immunosorbent assay methods in sera from ALF patients and 30 healthy controls. Levels of sRAGE, EN-RAGE, and HMGB1 (but not CML) were significantly greater (P < 0.001) in ALF patients versus normal controls. The levels of sRAGE, HMGB1, and EN-RAGE were significantly higher (P = 0.03, P < 0.01, and P = 0.03) in patients with a systemic inflammatory response syndrome (SIRS) score > 2 versus patients with a SIRS score ≤ 2. Nevertheless, only sRAGE levels were significantly higher in patients who underwent transplantation and/or died versus spontaneous survivors (P < 0.001), and they were positively associated with conventional markers of liver disease severity. Multivariate logistic regression identified an encephalopathy grade > 2 as an independent predictor of an adverse outcome on admission (odds ratio, 13; 95% confidence interval, 2.3-73; P < 0.001). The RAGE-ligand axis may interfere with liver regeneration and should be a promising objective for further research.
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Affiliation(s)
| | | | | | - William M Lee
- Division of Digestive and Liver Diseases, Internal Medicine, University of Texas Southwestern Medical Center, Dallas, TX 75390
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Increase in the Level of Proinflammatory Cytokine HMGB1 in Nasal Fluids of Patients With Rhinitis and its Sequestration by Glycyrrhizin Induces Eosinophil Cell Death. Clin Exp Otorhinolaryngol 2015; 8:123-8. [PMID: 26045910 PMCID: PMC4451536 DOI: 10.3342/ceo.2015.8.2.123] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2013] [Revised: 08/29/2013] [Accepted: 11/07/2013] [Indexed: 01/14/2023] Open
Abstract
OBJECTIVES The nuclear protein high mobility group protein box 1 (HMGB1) is a proinflammatory mediator that belongs to the alarmin family of proinflammatory mediators, and it has recently emerged as a key player in different acute and chronic immune disorders. Several lines of evidence demonstrate that HMGB1 is actively released extracellularly from immune cells or passively released from necrotic cells. Because of the ability of HMGB1 to sustain chronic inflammation, we investigated whether the protein is present in nasal fluids of patients with different forms of rhinitis. METHODS HMGB1 levels were evaluated in nasal fluids of healthy subjects or rhinitis patients who were treated or not treated with different treatments. RESULTS We report that the level of HMGB1 was significantly increased in nasal fluids of patients with allergic rhinitis, patients with NARES (nonallergic rhinitis with eosinophiliac syndrome), as well as patients with polyps. We also found that a formulation containing the HMGB1-binding compound glycyrrhizin (GLT) reduced the HMGB1 content in nasal fluids of rhinitis patients to an extent similar to that with nasal budesonide treatment. We also found that among the cultured human leukocyte populations, eosinophils released higher amounts of HMGB1. Based on the ability of HMGB1 to sustain eosinophil survival and the ability of GLT to inactivate HMGB1, we report that GLT selectively killed cultured eosinophils and had no effect on neutrophils, macrophages, and lymphocytes. CONCLUSION Collectively, these data underscore the role of HMGB1 in rhinitis pathogenesis and the therapeutic potential of GLT formulations in treatment of chronic inflammatory disorders of the nasal mucosa.
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Wang F, Meng Y, Zhang Y, Zhao G, Zheng X, Xiao Q, Yu Y. RETRACTED: Ketamine reduces lipopolysaccharide-induced high-mobility group box-1 through heme oxygenase-1 and nuclear factor erythroid 2-related factor 2/ p38 mitogen-activated protein kinase. J Surg Res 2015; 194:599-613. [DOI: 10.1016/j.jss.2014.11.031] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2014] [Revised: 11/02/2014] [Accepted: 11/21/2014] [Indexed: 01/07/2023]
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Stress induces the danger-associated molecular pattern HMGB-1 in the hippocampus of male Sprague Dawley rats: a priming stimulus of microglia and the NLRP3 inflammasome. J Neurosci 2015; 35:316-24. [PMID: 25568124 DOI: 10.1523/jneurosci.3561-14.2015] [Citation(s) in RCA: 163] [Impact Index Per Article: 18.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Exposure to acute and chronic stressors sensitizes the proinflammatory response of microglia to a subsequent immune challenge. However, the proximal signal by which stressors prime microglia remains unclear. Here, high mobility group box-1 (HMGB-1) protein was explored as a potential mediator of stress-induced microglial priming and whether HMGB-1 does so via the nucleotide-binding domain, leucine-rich repeat, pyrin domain containing protein 3 (NLRP3) inflammasome. Exposure to 100 inescapable tail shocks (ISs) increased HMGB-1 and NLRP3 protein in the hippocampus and led isolated microglia to release HMGB-1 ex vivo. To determine whether HMGB-1 signaling is necessary for stress-induced sensitization of microglia, the HMGB-1 antagonist BoxA was injected into the cisterna magna before IS. Hippocampal microglia were isolated 24 h later and stimulated with LPS ex vivo to probe for stress-induced sensitization of proinflammatory responses. Previous IS potentiated gene expression of NLRP3 and proinflammatory cytokines to LPS, that is, microglia were sensitized. Treatment with BoxA abolished this effect. To determine whether HMGB-1 is sufficient to prime microglia, IS was replaced with intracerebral administration of disulfide or fully reduced HMGB-1. Intracerebral disulfide HMGB-1 mimicked the effect of the stressor, because microglia isolated from HMGB-1-treated rats expressed exaggerated NLRP3 and proinflammatory cytokine expression after LPS treatment, whereas fully reduced HMGB-1 had no effect. The present results suggest that the CNS innate immune system can respond to an acute stressor as if it were cellular damage, thereby releasing the danger signal HMGB-1 in the brain to prime microglia by acting on the NLRP3 inflammasome, in preparation for a later immune challenge.
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Horst K, Hildebrand F, Pfeifer R, Hübenthal S, Almahmoud K, Sassen M, Steinfeldt T, Wulf H, Ruchholtz S, Pape HC, Eschbach D. Impact of haemorrhagic shock intensity on the dynamic of alarmins release in porcine poly-trauma animal model. Eur J Trauma Emerg Surg 2015; 42:67-75. [PMID: 26038024 DOI: 10.1007/s00068-015-0504-1] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2014] [Accepted: 02/23/2015] [Indexed: 10/23/2022]
Abstract
PURPOSE Traumatic insults result in an altered inflammatory response, in which alarmins release has a central role. The impact of haemorrhagic shock intensity on the long-term kinetics of alarmins is not yet fully elucidated. We investigated these aspects in a combined trauma (chest, abdominal, and extremities injury) porcine model with different severities and durations of haemorrhagic shock. METHODS After induction of combined trauma (tibia fracture, lung contusion, and liver laceration), haemorrhagic shock was induced at different intensities: moderate haemorrhage (MH; n = 15): mean arterial pressure (MAP) <30 ± 5 mmHg [maximum loss of total blood volume (TBVmax): 45 %] for 90 min, and severe haemorrhage (SH; n = 10): MAP <25 ± 5 mmHg (TBVmax 50 %) for 120 min. Resuscitation was performed using a standardized crystalloid infusion protocol. Animals were mechanically ventilated and underwent ICU-monitoring for 48 h (MH) and 48.5 h (SH). Blood samples were collected over the clinical time course, and systemic levels of serum alarmins [High-Mobility Group Protein B-1 (HMGB-1) and Heat Shock Protein 70 (HSP70)] were measured using an ELISA kit. RESULTS Heart rate, systemic blood pressure, lactate, and base excess were significantly altered as a function of haemorrhagic shock in both trauma groups (MH and SH). Systemic HMGB-1 levels were significantly elevated in both trauma groups when compared to the sham group. Haemorrhagic shock severity and duration were positively correlated with HMGB-1 levels and compared to baseline values, concentrations remained significantly increased in SH when compared to MH. On the other hand, we observed a significant decrease in the systemic HSP70 levels of trauma groups (MH, and SH) when compared to the sham group, which was significantly decreased compared to baseline values in SH over the entire time course. CONCLUSION Our data show that haemorrhagic shock duration and severity affect the systemic levels of HMGB-1 and HSP70. This early alarmins release after trauma can be used to guide the treatment strategies (e.g. surgical procedures) of polytrauma patients.
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Affiliation(s)
- K Horst
- Department of Orthopaedic Trauma, Harald Tscherne Research Laboratory, University Hospital Aachen, Pauwelsstrasse 30, 52074, Aachen, Germany.
| | - F Hildebrand
- Department of Orthopaedic Trauma, Harald Tscherne Research Laboratory, University Hospital Aachen, Pauwelsstrasse 30, 52074, Aachen, Germany
| | - R Pfeifer
- Department of Orthopaedic Trauma, Harald Tscherne Research Laboratory, University Hospital Aachen, Pauwelsstrasse 30, 52074, Aachen, Germany
| | - S Hübenthal
- Department of Orthopaedic Trauma, Harald Tscherne Research Laboratory, University Hospital Aachen, Pauwelsstrasse 30, 52074, Aachen, Germany
| | - K Almahmoud
- Department of Orthopaedic Trauma, Harald Tscherne Research Laboratory, University Hospital Aachen, Pauwelsstrasse 30, 52074, Aachen, Germany
| | - M Sassen
- Department of Anaesthesiology, University Hospital Marburg, Marburg, Germany
| | - T Steinfeldt
- Department of Anaesthesiology, University Hospital Marburg, Marburg, Germany
| | - H Wulf
- Department of Anaesthesiology, University Hospital Marburg, Marburg, Germany
| | - S Ruchholtz
- Department of Hand, Traumatology and Reconstructive Surgery, University Hospital Marburg, Marburg, Germany
| | - H C Pape
- Department of Orthopaedic Trauma, Harald Tscherne Research Laboratory, University Hospital Aachen, Pauwelsstrasse 30, 52074, Aachen, Germany
| | - D Eschbach
- Department of Hand, Traumatology and Reconstructive Surgery, University Hospital Marburg, Marburg, Germany
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Role of high-mobility group box-1 in myocardial ischemia/reperfusion injury and the effect of ethyl pyruvate. Exp Ther Med 2015; 9:1537-1541. [PMID: 25780465 PMCID: PMC4353799 DOI: 10.3892/etm.2015.2290] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2014] [Accepted: 01/29/2015] [Indexed: 12/26/2022] Open
Abstract
High-mobility group box-1 (HMGB1) acts as a proinflammatory cytokine that triggers and amplifies the inflammation cascade following ischemia/reperfusion (I/R). Ethyl pyruvate (EP) has been reported to inhibit HMGB1 release in several I/R models. This study was designed to investigate the potential role of HMGB1 in a rat myocardial I/R model and to determine the effect of EP. Male Sprague Dawley rats were subjected to 30 min myocardial ischemia and 48 h reperfusion. In protocol 1, the rats were assigned to one of four groups (n=16 per group): Phosphate-buffered saline (PBS) or recombinant human HMGB1 (rhHMGB1) at three different doses (1, 10 or 100 μg/kg). In protocol 2, the rats were also assigned to one of four groups (n=16 per group): Sham, control, EP and EP + rhHMGB1. EP (40 mg/kg) or rhHMGB1 (100 μg/kg) was injected intravenously prior to reperfusion. Hemodynamic measurements were performed, and myocardial infarct size (IS) was calculated. Western blotting was conducted to evaluate HMGB1, tumor necrosis factor-α (TNF-α) and interleukin-6 (IL-6) expression levels. In the protocol 1 rats, the IS was markedly increased in the rhHMGB1 (100 μg/kg) group compared with that in the PBS group, and this increase was accompanied by elevated levels of TNF-α and IL-6. In the protocol 2 rats, I/R resulted a 4.8-fold increase in HMGB1 expression with an increased IS and impaired cardiac function compared with the sham group. EP significantly inhibited the elevated HMGB1 level, suppressed the activated TNF-α and IL-6 and reduced cardiac dysfunction. This cardioprotection was abolished by rhHMGB1. In conclusion, accumulation of HMGB1 is deleterious to the heart following myocardial I/R. EP can exert a strong protective effect against myocardial I/R injury, and these benefits are associated with a reduction in HMGB1.
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Anti-HMGB1 monoclonal antibody ameliorates immunosuppression after peripheral tissue trauma: attenuated T-lymphocyte response and increased splenic CD11b (+) Gr-1 (+) myeloid-derived suppressor cells require HMGB1. Mediators Inflamm 2015; 2015:458626. [PMID: 25709155 PMCID: PMC4325468 DOI: 10.1155/2015/458626] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2014] [Accepted: 09/10/2014] [Indexed: 01/13/2023] Open
Abstract
Although tissue-derived high mobility group box 1 (HMGB1) is involved in many aspects of inflammation and tissue injury after trauma, its role in trauma-induced immune suppression remains elusive. Using an established mouse model of peripheral tissue trauma, which includes soft tissue and fracture components, we report here that treatment with anti-HMGB1 monoclonal antibody ameliorated the trauma-induced attenuated T-cell responses and accumulation of CD11b+Gr-1+ myeloid-derived suppressor cells in the spleens seen two days after injury. Our data suggest that HMGB1 released after tissue trauma contributes to signaling pathways that lead to attenuation of T-lymphocyte responses and enhancement of myeloid-derived suppressor cell expansion.
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Li L, Ling Y, Huang M, Yin T, Gou SM, Zhan NY, Xiong JX, Wu HS, Yang ZY, Wang CY. Heparin inhibits the inflammatory response induced by LPS and HMGB1 by blocking the binding of HMGB1 to the surface of macrophages. Cytokine 2015; 72:36-42. [PMID: 25562836 DOI: 10.1016/j.cyto.2014.12.010] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2014] [Revised: 11/10/2014] [Accepted: 12/03/2014] [Indexed: 12/11/2022]
Abstract
High mobility group box 1 protein (HMGB1), a nuclear non-histone DNA-binding protein, is secreted extracellularly during inflammation and is a late mediator of inflammatory responses. The pro-inflammatory activity of recombinant HMGB1 proteins is dependent upon the formation of complexes with other mediators, such as lipopolysaccharide (LPS). This study investigated the influence of heparin on LPS+HMGB1-mediated inflammatory responses in cultured macrophages and a murine sepsis model. HMGB1 promoted the phosphorylation of p38 and ERK1/2. HMGB1 enhanced the induction of the pro-inflammatory cytokine, TNF-α, by LPS in macrophages. Heparin blocked the binding of HMGB1 to the surface of macrophages, and suppressed the phosphorylation of p38 and ERK1/2, but not JNK; TNF-α secretion was also decreased. However, heparin alone did not affect LPS-induced production of TNF-α. Heparin reduced lethality in mice exposed to LPS+HMGB1. To conclude, heparin inhibited LPS-induced HMGB1-amplified inflammatory responses by blocking HMGB1 binding to macrophage surfaces. Heparin could be used therapeutically as an effective inhibitor of HMGB1-associated inflammation.
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Affiliation(s)
- Li Li
- Pancreatic Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province 430022, China
| | - Yan Ling
- Pancreatic Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province 430022, China
| | - Min Huang
- Pancreatic Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province 430022, China
| | - Tao Yin
- Pancreatic Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province 430022, China
| | - Shan-Miao Gou
- Pancreatic Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province 430022, China
| | - Nai-Yang Zhan
- Pancreatic Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province 430022, China
| | - Jiong-Xin Xiong
- Pancreatic Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province 430022, China
| | - He-Shui Wu
- Pancreatic Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province 430022, China
| | - Zhi-Yong Yang
- Pancreatic Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province 430022, China.
| | - Chun-You Wang
- Pancreatic Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province 430022, China.
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Kang R, Chen R, Zhang Q, Hou W, Wu S, Cao L, Huang J, Yu Y, Fan XG, Yan Z, Sun X, Wang H, Wang Q, Tsung A, Billiar TR, Zeh HJ, Lotze MT, Tang D. HMGB1 in health and disease. Mol Aspects Med 2014; 40:1-116. [PMID: 25010388 PMCID: PMC4254084 DOI: 10.1016/j.mam.2014.05.001] [Citation(s) in RCA: 680] [Impact Index Per Article: 68.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2014] [Accepted: 05/05/2014] [Indexed: 12/22/2022]
Abstract
Complex genetic and physiological variations as well as environmental factors that drive emergence of chromosomal instability, development of unscheduled cell death, skewed differentiation, and altered metabolism are central to the pathogenesis of human diseases and disorders. Understanding the molecular bases for these processes is important for the development of new diagnostic biomarkers, and for identifying new therapeutic targets. In 1973, a group of non-histone nuclear proteins with high electrophoretic mobility was discovered and termed high-mobility group (HMG) proteins. The HMG proteins include three superfamilies termed HMGB, HMGN, and HMGA. High-mobility group box 1 (HMGB1), the most abundant and well-studied HMG protein, senses and coordinates the cellular stress response and plays a critical role not only inside of the cell as a DNA chaperone, chromosome guardian, autophagy sustainer, and protector from apoptotic cell death, but also outside the cell as the prototypic damage associated molecular pattern molecule (DAMP). This DAMP, in conjunction with other factors, thus has cytokine, chemokine, and growth factor activity, orchestrating the inflammatory and immune response. All of these characteristics make HMGB1 a critical molecular target in multiple human diseases including infectious diseases, ischemia, immune disorders, neurodegenerative diseases, metabolic disorders, and cancer. Indeed, a number of emergent strategies have been used to inhibit HMGB1 expression, release, and activity in vitro and in vivo. These include antibodies, peptide inhibitors, RNAi, anti-coagulants, endogenous hormones, various chemical compounds, HMGB1-receptor and signaling pathway inhibition, artificial DNAs, physical strategies including vagus nerve stimulation and other surgical approaches. Future work further investigating the details of HMGB1 localization, structure, post-translational modification, and identification of additional partners will undoubtedly uncover additional secrets regarding HMGB1's multiple functions.
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Affiliation(s)
- Rui Kang
- Department of Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania 15213, USA.
| | - Ruochan Chen
- Department of Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania 15213, USA
| | - Qiuhong Zhang
- Department of Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania 15213, USA
| | - Wen Hou
- Department of Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania 15213, USA
| | - Sha Wu
- Department of Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania 15213, USA
| | - Lizhi Cao
- Department of Pediatrics, Xiangya Hospital, Central South University, Changsha, Hunan 410008, China
| | - Jin Huang
- Department of Oncology, Xiangya Hospital, Central South University, Changsha, Hunan 410008, China
| | - Yan Yu
- Department of Pediatrics, Xiangya Hospital, Central South University, Changsha, Hunan 410008, China
| | - Xue-Gong Fan
- Department of Infectious Diseases, Xiangya Hospital, Central South University, Changsha, Hunan 410008, China
| | - Zhengwen Yan
- Department of Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania 15213, USA; Department of Neurology, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, Guangdong 510120, China
| | - Xiaofang Sun
- Key Laboratory for Major Obstetric Diseases of Guangdong Province, Key Laboratory of Reproduction and Genetics of Guangdong Higher Education Institutes, Experimental Department of Institute of Gynecology and Obstetrics, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong 510510, China
| | - Haichao Wang
- Laboratory of Emergency Medicine, The Feinstein Institute for Medical Research, Manhasset, NY 11030, USA
| | - Qingde Wang
- Department of Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania 15213, USA
| | - Allan Tsung
- Department of Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania 15213, USA
| | - Timothy R Billiar
- Department of Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania 15213, USA
| | - Herbert J Zeh
- Department of Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania 15213, USA
| | - Michael T Lotze
- Department of Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania 15213, USA
| | - Daolin Tang
- Department of Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania 15213, USA.
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Induction of cytokine production in cholesteatoma keratinocytes by extracellular high-mobility group box chromosomal protein 1 combined with DNA released by apoptotic cholesteatoma keratinocytes. Mol Cell Biochem 2014; 400:189-200. [PMID: 25416861 DOI: 10.1007/s11010-014-2275-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2014] [Accepted: 11/15/2014] [Indexed: 10/24/2022]
Abstract
High-mobility group box chromosomal protein 1 (HMGB-1), a nuclear DNA binding protein, was recently rediscovered as a new proinflammatory cytokine. The purpose of this study was to determine HMGB-1 expression in vivo and to identify the effect of extracellular HMGB-1 in inflammatory process associated with bone destruction in cholesteatoma. We investigated the expression and location of HMGB-1 in the cholesteatoma and healthy skin using an immunofluorescence assay. We also detected apoptosis and DNA fragments in the cholesteatoma by TUNEL staining. HMGB-1 concentration in apoptotic supernatants from UV light-treated cells, culture supernatants and its translocation in cholesteatoma keratinocytes stimulated by supernatants from UV light-treated cells were measured by immunoblot analysis and immunofluorescence assay. Cultures of human cholesteatoma keratinocytes were exposed to CpG-DNA, HMGB-1, or CpG-DNA complexed to HMGB-1 for 24 h. Cytokines in the culture supernatant were measured by ELISA. In addition, levels of proinflammatory cytokines released by cholesteatoma keratinocytes stimulated by supernatants from UV light-treated cells with or without anti-HMGB-1 antibodies and supernatants from UV light-treated cells with DNase 1 were measured by enzyme-linked immunosorbent assay. The expression of HMGB-1 in cholesteatoma increased and it translocated both to the cytoplasm and extracellular space. Furthermore, the HMGB-1 concentration in supernatants increased significantly after addition of supernatants from UV light-treated cells. TNF-α and IL-1β can be induced by purified HMGB-1 combined with CpG-DNA in the cholesteatoma keratinocytes. In addition, supernatants of apoptotic cells containing HMGB-1-DNA were effective in inducing TNF-α and IL-1β secretion. This study suggested that persistent expression of extracellular HMGB-1 and DNA fragments in cholesteatoma leads to TNF-α and IL-1β production, causing bone resorption and destruction. Thus, we have implicated that HMGB-1-DNA complexes might act as a key molecule involved in bone resorption associated with cholesteatoma.
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Yu SL, Wong CK, Szeto CC, Li EK, Cai Z, Tam LS. Members of the receptor for advanced glycation end products axis as potential therapeutic targets in patients with lupus nephritis. Lupus 2014; 24:675-86. [PMID: 25411258 DOI: 10.1177/0961203314559631] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2014] [Accepted: 10/20/2014] [Indexed: 12/22/2022]
Abstract
The relationship of inflammation and the expression of full-length receptor for advanced glycation end products (flRAGE) on monocytes, plasma levels of RAGE ligand high mobility group box protein 1 (HMGB1), soluble RAGE (sRAGE) and endogenous secretory RAGE (esRAGE) was assessed to elucidate the effect of HMGB1/DNA/RAGE-mediated innate inflammatory responses in patients with lupus nephritis. Cell surface expression of flRAGE was elevated on the monocytes of lupus patients, correlated with plasma HMGB1 levels. Plasma sRAGE level negatively correlated with systemic lupus erythematosus (SLE) disease activity index. Plasma esRAGE level was significantly lower in SLE patients with flare while esRAGE/sRAGE ratio negatively correlated with complement C3 level. HMGB1 alone could moderately induce ex vivo IL-6 production from monocytes, resulting in activation of intracellular p38 mitogen-activated protein kinase (MAPK), c-Jun N-terminal kinase and nuclear factor (NF)-κB. Moreover, toll-like receptor-9 ligand together with HMGB1 exhibited a synergistic effect on IL-6 and IL-12p70 secretions and the phosphorylation of p38 MAPK and NF-κB. Therefore, over-expression of flRAGE in lupus may lead to the amplification of RAGE ligands-mediated inflammatory responses through the activation of p38 MAPK and NF-κB. Plasma sRAGE may serve as a potential biomarker for disease activity and a future therapeutic target in SLE.
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Affiliation(s)
- S L Yu
- Department of Medicine and Therapeutics, Prince of Wales Hospital, The Chinese University of Hong Kong, Shatin, Hong Kong, China Department of Rheumatology, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou Medical University (GZMU), Guangdong, China
| | - C K Wong
- Department of Chemical Pathology, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, NT, Hong Kong Institute of Chinese Medicine and State Key Laboratory of Phytochemistry and Plant Resources in West China, The Chinese University of Hong Kong, Hong Kong Shenzhen Research Institute, The Chinese University of Hong Kong, Shenzhen, China
| | - C C Szeto
- Department of Medicine and Therapeutics, Prince of Wales Hospital, The Chinese University of Hong Kong, Shatin, Hong Kong, China
| | - E K Li
- Department of Medicine and Therapeutics, Prince of Wales Hospital, The Chinese University of Hong Kong, Shatin, Hong Kong, China
| | - Z Cai
- Department of Chemical Pathology, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, NT, Hong Kong Shenzhen Research Institute, The Chinese University of Hong Kong, Shenzhen, China
| | - L S Tam
- Department of Medicine and Therapeutics, Prince of Wales Hospital, The Chinese University of Hong Kong, Shatin, Hong Kong, China Shenzhen Research Institute, The Chinese University of Hong Kong, Shenzhen, China.
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Baicalin Inhibits High-Mobility Group Box 1 Release and Improves Survival in Experimental Sepsis. Shock 2014; 41:324-30. [DOI: 10.1097/shk.0000000000000122] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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Abstract
SIGNIFICANCE Inflammation is a complex biological process that represents the body's response to infection and/or injury. Endogenous molecules that induce inflammation are called death- or damage-associated molecular patterns (DAMPs). Among cellular constituents with DAMP activity, nuclear molecules can stimulate pattern recognition receptors, including toll-like receptors (TLRs). Current research is elucidating the translocation of nuclear molecules during cell death and identifying novel anti-inflammatory approaches to block their DAMP activity. RECENT ADVANCES High mobility group box protein 1 (HMGB1), a non-histone nuclear protein, can translocate from cells during immune cell activation and cell death. Depending on redox state, HMGB1 can interact with TLR4 although it can bind to molecules such as cytokines to trigger other receptors. DNA and histones, which are bound together in the nucleus, also have important immunological activity. For DNA, DAMP activity may vary depending upon the binding to molecules that affect cell entry and intracellular location. The role of nuclear molecules in disease has been established in animal models using antibodies as inhibitors. CRITICAL ISSUES Key issues about the DAMP activity of nuclear molecules relate to (i) the impact on function of biochemical modifications such as redox state and post-translational modification, and (ii) the composition and properties of complexes that nuclear molecules may form with other blood components to affect immunological activity. FUTURE DIRECTIONS With the recognition of the immunological activity of the products of dead cells, future studies will define the diversity and properties of nuclear molecules in the extracellular space and develop strategies to block their activity during inflammation.
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Affiliation(s)
- David S Pisetsky
- Medical Research Service, Durham VA Hospital, Department of Medicine, Duke University Medical Center , Durham, North Carolina
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