151
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Grace PM, Strand KA, Galer EL, Rice KC, Maier SF, Watkins LR. Protraction of neuropathic pain by morphine is mediated by spinal damage associated molecular patterns (DAMPs) in male rats. Brain Behav Immun 2018; 72:45-50. [PMID: 28860068 PMCID: PMC5832500 DOI: 10.1016/j.bbi.2017.08.018] [Citation(s) in RCA: 55] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/16/2017] [Accepted: 08/28/2017] [Indexed: 11/27/2022] Open
Abstract
We have recently reported that a short course of morphine, starting 10days after sciatic chronic constriction injury (CCI), prolonged the duration of mechanical allodynia for months after morphine ceased. Maintenance of this morphine-induced persistent sensitization was dependent on spinal NOD-like receptor protein 3 (NLRP3) inflammasomes-protein complexes that proteolytically activate interleukin-1β (IL-1β) via caspase-1. However, it is still unclear how NLRP3 inflammasome signaling is maintained long after morphine is cleared. Here, we demonstrate that spinal levels of the damage associated molecular patterns (DAMPs) high mobility group box 1 (HMGB1) and biglycan are elevated during morphine-induced persistent sensitization in male rats; that is, 5weeks after cessation of morphine dosing. We also show that HMGB1 and biglycan levels are at least partly dependent on the initial activation of caspase-1, as well as Toll like receptor 4 (TLR4) and the purinergic receptor P2X7R-receptors responsible for priming and activation of NLRP3 inflammasomes. Finally, pharmacological attenuation of the DAMPs HMGB1, biglycan, heat shock protein 90 and fibronectin persistently reversed morphine-prolonged allodynia. We conclude that after peripheral nerve injury, morphine treatment results in persistent DAMP release via TLR4, P2X7R and caspase-1, which are involved in formation/activation of NLRP3 inflammasomes. These DAMPs are responsible for maintaining persistent allodynia, which may be due to engagement of a positive feedback loop, in which NLRP3 inflammasomes are persistently activated by DAMPs signaling at TLR4 and P2X7R.
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Affiliation(s)
- Peter M. Grace
- Department of Psychology and Neuroscience, and The Center for Neuroscience, University of Colorado, Boulder, CO, USA,Discipline of Pharmacology, School of Medicine, University of Adelaide, Adelaide, SA, Australia
| | - Keith A. Strand
- Department of Psychology and Neuroscience, and The Center for Neuroscience, University of Colorado, Boulder, CO, USA
| | - Erika L. Galer
- Department of Psychology and Neuroscience, and The Center for Neuroscience, University of Colorado, Boulder, CO, USA
| | - Kenner C. Rice
- Drug Design and Synthesis Section, National Institute on Drug Abuse and National Institute on Alcohol Abuse and Alcoholism, Bethesda, MD, USA
| | - Steven F. Maier
- Department of Psychology and Neuroscience, and The Center for Neuroscience, University of Colorado, Boulder, CO, USA
| | - Linda R. Watkins
- Department of Psychology and Neuroscience, and The Center for Neuroscience, University of Colorado, Boulder, CO, USA
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152
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Van Opdenbosch N, Van Gorp H, Verdonckt M, Saavedra PHV, de Vasconcelos NM, Gonçalves A, Vande Walle L, Demon D, Matusiak M, Van Hauwermeiren F, D'Hont J, Hochepied T, Krautwald S, Kanneganti TD, Lamkanfi M. Caspase-1 Engagement and TLR-Induced c-FLIP Expression Suppress ASC/Caspase-8-Dependent Apoptosis by Inflammasome Sensors NLRP1b and NLRC4. Cell Rep 2018; 21:3427-3444. [PMID: 29262324 PMCID: PMC5746600 DOI: 10.1016/j.celrep.2017.11.088] [Citation(s) in RCA: 93] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2017] [Revised: 11/15/2017] [Accepted: 11/27/2017] [Indexed: 02/02/2023] Open
Abstract
The caspase activation and recruitment domain (CARD)-based inflammasome sensors NLRP1b and NLRC4 induce caspase-1-dependent pyroptosis independent of the inflammasome adaptor ASC. Here, we show that NLRP1b and NLRC4 trigger caspase-8-mediated apoptosis as an alternative cell death program in caspase-1-/- macrophages and intestinal epithelial organoids (IECs). The caspase-8 adaptor FADD was recruited to ASC specks, which served as cytosolic platforms for caspase-8 activation and NLRP1b/NLRC4-induced apoptosis. We further found that caspase-1 protease activity dominated over scaffolding functions in suppressing caspase-8 activation and induction of apoptosis of macrophages and IECs. Moreover, TLR-induced c-FLIP expression inhibited caspase-8-mediated apoptosis downstream of ASC speck assembly, but did not affect pyroptosis induction by NLRP1b and NLRC4. Moreover, unlike during pyroptosis, NLRP1b- and NLRC4-elicited apoptosis retained alarmins and the inflammasome-matured cytokines interleukin 1β (IL-1β) and IL-18 intracellularly. This work identifies critical mechanisms regulating apoptosis induction by the inflammasome sensors NLRP1b and NLRC4 and suggests converting pyroptosis into apoptosis as a paradigm for suppressing inflammation.
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Affiliation(s)
- Nina Van Opdenbosch
- Department of Internal Medicine, Ghent University, 9052 Ghent, Belgium; VIB-UGent Center for Inflammation Research, VIB, 9052 Ghent, Belgium
| | - Hanne Van Gorp
- Department of Internal Medicine, Ghent University, 9052 Ghent, Belgium; VIB-UGent Center for Inflammation Research, VIB, 9052 Ghent, Belgium
| | - Maarten Verdonckt
- Department of Internal Medicine, Ghent University, 9052 Ghent, Belgium; VIB-UGent Center for Inflammation Research, VIB, 9052 Ghent, Belgium
| | - Pedro H V Saavedra
- Department of Internal Medicine, Ghent University, 9052 Ghent, Belgium; VIB-UGent Center for Inflammation Research, VIB, 9052 Ghent, Belgium
| | - Nathalia M de Vasconcelos
- Department of Internal Medicine, Ghent University, 9052 Ghent, Belgium; VIB-UGent Center for Inflammation Research, VIB, 9052 Ghent, Belgium
| | - Amanda Gonçalves
- VIB-UGent Center for Inflammation Research, VIB, 9052 Ghent, Belgium; VIB Bioimaging Core, VIB, 9000 Ghent, Belgium
| | - Lieselotte Vande Walle
- Department of Internal Medicine, Ghent University, 9052 Ghent, Belgium; VIB-UGent Center for Inflammation Research, VIB, 9052 Ghent, Belgium
| | - Dieter Demon
- Department of Internal Medicine, Ghent University, 9052 Ghent, Belgium; VIB-UGent Center for Inflammation Research, VIB, 9052 Ghent, Belgium
| | - Magdalena Matusiak
- Department of Internal Medicine, Ghent University, 9052 Ghent, Belgium; VIB-UGent Center for Inflammation Research, VIB, 9052 Ghent, Belgium
| | - Filip Van Hauwermeiren
- Department of Internal Medicine, Ghent University, 9052 Ghent, Belgium; VIB-UGent Center for Inflammation Research, VIB, 9052 Ghent, Belgium
| | - Jinke D'Hont
- VIB-UGent Center for Inflammation Research, VIB, 9052 Ghent, Belgium; Department of Biomedical Molecular Biology, Ghent University, 9000 Ghent, Belgium
| | - Tino Hochepied
- VIB-UGent Center for Inflammation Research, VIB, 9052 Ghent, Belgium; Department of Biomedical Molecular Biology, Ghent University, 9000 Ghent, Belgium
| | - Stefan Krautwald
- Department of Nephrology and Hypertension, University Hospital Schleswig-Holstein, 24105 Kiel, Germany
| | | | - Mohamed Lamkanfi
- Department of Internal Medicine, Ghent University, 9052 Ghent, Belgium; VIB-UGent Center for Inflammation Research, VIB, 9052 Ghent, Belgium.
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153
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Sun Y, Chen H, Dai J, Wan Z, Xiong P, Xu Y, Han Z, Chai W, Gong F, Zheng F. Glycyrrhizin Protects Mice Against Experimental Autoimmune Encephalomyelitis by Inhibiting High-Mobility Group Box 1 (HMGB1) Expression and Neuronal HMGB1 Release. Front Immunol 2018; 9:1518. [PMID: 30013568 PMCID: PMC6036111 DOI: 10.3389/fimmu.2018.01518] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2018] [Accepted: 06/19/2018] [Indexed: 12/12/2022] Open
Abstract
The inflammatory mediator high-mobility group box 1 (HMGB1) plays a critical role in the pathogenesis of human multiple sclerosis (MS) and mouse experimental autoimmune encephalomyelitis (EAE). Glycyrrhizin (GL), a glycoconjugated triterpene extracted from licorice root, has the ability to inhibit the functions of HMGB1; however, GL’s function against EAE has not been thoroughly characterized to date. To determine the benefit of GL as a modulator of neuroinflammation, we used an in vivo study to examine GL’s effect on EAE along with primary cultured cortical neurons to study the GL effect on HMGB1 release. Treatment of EAE mice with GL from onset to the peak stage of disease resulted in marked attenuation of EAE severity, reduced inflammatory cell infiltration and demyelination, decreased tumor necrosis factor-alpha (TNF-α), IFN-γ, IL-17A, IL-6, and transforming growth factor-beta 1, and increased IL-4 both in serum and spinal cord homogenate. Moreover, HMGB1 levels in different body fluids were reduced, accompanied by a decrease in neuronal damage, activated astrocytes and microglia, as well as HMGB1-positive astrocytes and microglia. GL significantly reversed HMGB1 release into the medium induced by TNF-α stimulation in primary cultured cortical neurons. Taken together, the results indicate that GL has a strong neuroprotective effect on EAE mice by reducing HMGB1 expression and release and thus can be used to treat central nervous system inflammatory diseases, such as MS.
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Affiliation(s)
- Yan Sun
- Wuhan Institute for Neuroscience and Neuroengineering, South-Central University for Nationalities, Wuhan, China.,Department of Immunology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Department of Neurobiology, College of Life Sciences, South-Central University for Nationalities, Wuhan, China
| | - Huoying Chen
- Department of Immunology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Department of Laboratory Medicine, The Second Affiliated Hospital of Guilin Medical University, Guilin, China
| | - Jiapei Dai
- Wuhan Institute for Neuroscience and Neuroengineering, South-Central University for Nationalities, Wuhan, China.,Department of Neurobiology, College of Life Sciences, South-Central University for Nationalities, Wuhan, China
| | - Zhongjun Wan
- Department of Neurobiology, College of Life Sciences, South-Central University for Nationalities, Wuhan, China
| | - Ping Xiong
- Department of Immunology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yong Xu
- Department of Immunology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Zhengrong Han
- Wuhan Institute for Neuroscience and Neuroengineering, South-Central University for Nationalities, Wuhan, China.,Department of Neurobiology, College of Life Sciences, South-Central University for Nationalities, Wuhan, China
| | - Weitai Chai
- Wuhan Institute for Neuroscience and Neuroengineering, South-Central University for Nationalities, Wuhan, China.,Department of Neurobiology, College of Life Sciences, South-Central University for Nationalities, Wuhan, China
| | - Feili Gong
- Department of Immunology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Fang Zheng
- Department of Immunology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Key Laboratory of Organ Transplantation, Ministry of Education, Chinese Academy of Medical Sciences, Wuhan, China.,NHC Key Laboratory of Organ Transplantation, Chinese Academy of Medical Sciences, Wuhan, China.,Key Laboratory of Organ Transplantation, Chinese Academy of Medical Sciences, Wuhan, China
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154
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Chatterjee S. Endothelial Mechanotransduction, Redox Signaling and the Regulation of Vascular Inflammatory Pathways. Front Physiol 2018; 9:524. [PMID: 29930512 PMCID: PMC5999754 DOI: 10.3389/fphys.2018.00524] [Citation(s) in RCA: 93] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2018] [Accepted: 04/24/2018] [Indexed: 12/13/2022] Open
Abstract
The endothelium that lines the interior of blood vessels is directly exposed to blood flow. The shear stress arising from blood flow is “sensed” by the endothelium and is “transduced” into biochemical signals that eventually control vascular tone and homeostasis. Sensing and transduction of physical forces occur via signaling processes whereby the forces associated with blood flow are “sensed” by a mechanotransduction machinery comprising of several endothelial cell elements. Endothelial “sensing” involves converting the physical cues into cellular signaling events such as altered membrane potential and activation of kinases, which are “transmission” signals that cause oxidant production. Oxidants produced are the “transducers” of the mechanical signals? What is the function of these oxidants/redox signals? Extensive data from various studies indicate that redox signals initiate inflammation signaling pathways which in turn can compromise vascular health. Thus, inflammation, a major response to infection or endotoxins, can also be initiated by the endothelium in response to various flow patterns ranging from aberrant flow to alteration of flow such as cessation or sudden increase in blood flow. Indeed, our work has shown that endothelial mechanotransduction signaling pathways participate in generation of redox signals that affect the oxidant and inflammation status of cells. Our goal in this review article is to summarize the endothelial mechanotransduction pathways that are activated with stop of blood flow and with aberrant flow patterns; in doing so we focus on the complex link between mechanical forces and inflammation on the endothelium. Since this “inflammation susceptible” phenotype is emerging as a trigger for pathologies ranging from atherosclerosis to rejection post-organ transplant, an understanding of the endothelial machinery that triggers these processes is very crucial and timely.
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Affiliation(s)
- Shampa Chatterjee
- Department of Physiology, Perelman School of Medicine, Institute for Environmental Medicine, University of Pennsylvania, Philadelphia, PA, United States
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155
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Peng J. The Pharmacological Targets and Clinical Evidence of Natural Products With Anti-hepatic Inflammatory Properties. Front Pharmacol 2018; 9:455. [PMID: 29922155 PMCID: PMC5996099 DOI: 10.3389/fphar.2018.00455] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2018] [Accepted: 04/18/2018] [Indexed: 12/24/2022] Open
Abstract
Inflammation contributes heavily to the pathogenesis of liver fibrosis, cirrhosis, and even hepatocellular carcinoma. Inflammation is probably a promising target for treatment of liver diseases. The natural products are considered as the potential source of new drug discovery and their pharmacological effects on hepatic inflammation have been widely reported. In this review, the natural products with anti-hepatic inflammatory properties are summarized based on their pharmacological effects and mechanisms, which are related to the suppression on the inflammation mediators including cytokines and chemokines, pattern recognition receptors, the activated transcriptional factors, and the potential regulatory factors. The clinical evidence is also summarized.
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Affiliation(s)
- Jinghua Peng
- Institute of Liver Diseases, Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai, China.,Shanghai Key Laboratory of Traditional Chinese Clinical Medicine, Shanghai, China
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156
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Liu X, Xu Q, Mei L, Lei H, Wen Q, Miao J, Huang H, Chen D, Du S, Zhang S, Zhou J, Deng R, Li Y, Li C, Li H. Paeonol attenuates acute lung injury by inhibiting HMGB1 in lipopolysaccharide-induced shock rats. Int Immunopharmacol 2018; 61:169-177. [PMID: 29883962 DOI: 10.1016/j.intimp.2018.05.032] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2017] [Revised: 05/17/2018] [Accepted: 05/30/2018] [Indexed: 01/02/2023]
Abstract
High-mobility group box 1 (HMGB1) is a highly conserved DNA-binding nuclear protein that facilitates gene transcription and the DNA repair response. However, HMGB1 may be released by necrotic cells as well as activated monocytes and macrophages following stimulation with lipopolysaccharide (LPS), interleukin-1β (IL-1β), or tumor necrosis factor-α (TNF-α). Extracellular HMGB1 plays a critical role in the pathogenesis of acute lung injury (ALI) through activating the nuclear transcription factor κB (NF-κB) P65 pathway, thus, it may be a promising therapeutic target in shock-induced ALI. Paeonol (Pae) is the main active component of Paeonia suffruticosa, which has been used to inhibit the inflammatory response in traditional Chinese medicine. We have proven that Pae inhibits the expression, relocation and secretion of HMGB1 in vitro. However, the role of Pae in the HMGB1-NF-κB pathway remains unknown. We herein investigated the role of Pae in LPS-induced ALI rats. In this study, LPS induced a marked decrease in the mean arterial pressure (MAP) and survival rate (only 25% after 72 h), and induced severe pathological changes in the lung tissue of rats, which was accompanied by elevated expression of HMGB1 and its downstream protein NF-κB P65. Treatment with Pae significantly improved the survival rate (>60%) and MAP, and attenuated the pathological damage to the lung tissue in ALI rats. Western blotting revealed that Pae also inhibited the total expression of HMGB1, NF-κB P65 and TNF-α in the lung tissue of ALI rats. Moreover, Pae increased the expression of HMGB1 in the nucleus, inhibited the production of HMGB1 in the cytoplasm, and decreased the expression of P65 both in the nucleus and cytoplasm of lung tissue cells in LPS-induced ALI rats. The results were in agreement with those observed in the in vitro experiment. These findings indicate that Pae may be a potential treatment for ALI through its repression of the HMGB1-NF-κB P65 signaling pathway.
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Affiliation(s)
- Xia Liu
- School of Basic Medical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong Province 510006, China; School of Basic Medical Sciences, Guiyang University of Chinese Medicine, Guiyang, Guizhou Province 550025, China
| | - Qin Xu
- School of Basic Medical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong Province 510006, China
| | - Liyan Mei
- School of Basic Medical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong Province 510006, China
| | - Hang Lei
- School of Basic Medical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong Province 510006, China; Guangzhou Orthopedic Trauma Hospital, Guangzhou, Guangdong Province 510045, China
| | - Quan Wen
- School of Basic Medical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong Province 510006, China
| | - Jifei Miao
- School of Basic Medical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong Province 510006, China
| | - Huina Huang
- School of Basic Medical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong Province 510006, China
| | - Dongfeng Chen
- School of Basic Medical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong Province 510006, China
| | - Shaohui Du
- Department of Internal Medicine, Affiliated Shenzhen Hospital to Guangzhou University of Chinese Medicine, Shenzhen 518003, China
| | - Saixia Zhang
- School of Basic Medical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong Province 510006, China
| | - Jianhong Zhou
- School of Basic Medical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong Province 510006, China
| | - Rudong Deng
- School of Basic Medical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong Province 510006, China
| | - Yiwei Li
- School of Nursing Sciences, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong Province 510006, China
| | - Chun Li
- School of Nursing Sciences, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong Province 510006, China
| | - Hui Li
- School of Basic Medical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong Province 510006, China.
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157
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Giglio P, Gagliardi M, Tumino N, Antunes F, Smaili S, Cotella D, Santoro C, Bernardini R, Mattei M, Piacentini M, Corazzari M. PKR and GCN2 stress kinases promote an ER stress-independent eIF2α phosphorylation responsible for calreticulin exposure in melanoma cells. Oncoimmunology 2018; 7:e1466765. [PMID: 30221067 DOI: 10.1080/2162402x.2018.1466765] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2017] [Revised: 04/03/2018] [Accepted: 04/13/2018] [Indexed: 12/21/2022] Open
Abstract
The immunogenic cell death (ICD) process represents a novel therapeutic approach to treat tumours, in which cytotoxic compounds promote both cancer cell death and the emission of damage-associated molecular patterns (DAMPs) from dying cells, to activate the immune system against the malignancy. Therefore, we explored the possibility to stimulate the key molecular players with a pivotal role in the execution of the ICD program in melanoma cells. To this aim, we used the pro-ICD agents mitoxantrone and doxorubicin and found that both agents could induce cell death and stimulate the release/exposure of the strictly required DAMPs in melanoma cells: i) calreticulin (CRT) exposure on the cell membrane; ii) ATP secretion; iii) type I IFNs gene up-regulation and iv) HMGB1 secretion, highlighting no interference by oncogenic BRAF. Importantly, although the ER stress-related PERK activation has been linked to CRT externalization, through the phosphorylation of eIF2α, we found that this stress pathway together with PERK were not involved in melanoma cells. Notably, we identified PKR and GCN2 as key mediators of eIF2α phosphorylation, facilitating the translocation of CTR on melanoma cells surface, under pro-ICD drugs stimulation. Therefore, our data indicate that pro-ICD drugs are able to stimulate the production/release of DAMPs in melanoma cells at least in vitro, indicating in this approach a potential new valuable therapeutic strategy to treat human skin melanoma malignancy.
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Affiliation(s)
- Paola Giglio
- Department of Biology, University of Rome 'Tor Vergata', Rome, Italy.,Department of Epidemiology, National Institute for Infectious Diseases 'L. Spallanzani', Rome, Italy
| | - Mara Gagliardi
- Department of Biology, University of Rome 'Tor Vergata', Rome, Italy.,Department of Health Science (DISS), University of Piemonte Orientale, Novara, Italy
| | - Nicola Tumino
- Department of Epidemiology, National Institute for Infectious Diseases 'L. Spallanzani', Rome, Italy
| | - Fernanda Antunes
- Department of Pharmacology, Federal University of São Paulo, Brazil
| | - Soraya Smaili
- Department of Pharmacology, Federal University of São Paulo, Brazil
| | - Diego Cotella
- Department of Health Science (DISS), University of Piemonte Orientale, Novara, Italy
| | - Claudio Santoro
- Department of Health Science (DISS), University of Piemonte Orientale, Novara, Italy
| | - Roberta Bernardini
- Department of Biology, Centro Servizi Interdipartimentale-STA, University of Rome Tor Vergata, Rome, Italy
| | - Maurizio Mattei
- Department of Biology, Centro Servizi Interdipartimentale-STA, University of Rome Tor Vergata, Rome, Italy
| | - Mauro Piacentini
- Department of Biology, University of Rome 'Tor Vergata', Rome, Italy.,Department of Epidemiology, National Institute for Infectious Diseases 'L. Spallanzani', Rome, Italy
| | - Marco Corazzari
- Department of Epidemiology, National Institute for Infectious Diseases 'L. Spallanzani', Rome, Italy.,Department of Health Science (DISS), University of Piemonte Orientale, Novara, Italy
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158
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Kanneganti A, Malireddi RKS, Saavedra PHV, Vande Walle L, Van Gorp H, Kambara H, Tillman H, Vogel P, Luo HR, Xavier RJ, Chi H, Lamkanfi M. GSDMD is critical for autoinflammatory pathology in a mouse model of Familial Mediterranean Fever. J Exp Med 2018; 215:1519-1529. [PMID: 29793924 PMCID: PMC5987922 DOI: 10.1084/jem.20172060] [Citation(s) in RCA: 124] [Impact Index Per Article: 20.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2017] [Revised: 03/20/2018] [Accepted: 04/30/2018] [Indexed: 01/04/2023] Open
Abstract
Inflammasomes promote interleukin (IL)-1β secretion and pyroptosis. Kanneganti et al. now show that the pyroptosis effector gasdermin D (GSDMD) is required for systemic IL-1β secretion and autoinflammatory pathology in a mouse model of Familial Mediterranean Fever (FMF), suggesting GSDMD inhibitors as potential antiinflammatory treatments. Pyroptosis is an inflammasome-induced lytic cell death mode, the physiological role of which in chronic inflammatory diseases is unknown. Familial Mediterranean Fever (FMF) is the most common monogenic autoinflammatory disease worldwide, affecting an estimated 150,000 patients. The disease is caused by missense mutations in Mefv that activate the Pyrin inflammasome, but the pathophysiologic mechanisms driving autoinflammation in FMF are incompletely understood. Here, we show that Clostridium difficile infection of FMF knock-in macrophages that express a chimeric FMF-associated MefvV726A Pyrin elicited pyroptosis and gasdermin D (GSDMD)–mediated interleukin (IL)-1β secretion. Importantly, in vivo GSDMD deletion abolished spontaneous autoinflammatory disease. GSDMD-deficient FMF knock-in mice were fully protected from the runted growth, anemia, systemic inflammatory cytokine production, neutrophilia, and tissue damage that characterize this autoinflammatory disease model. Overall, this work identifies pyroptosis as a critical mechanism of IL-1β–dependent autoinflammation in FMF and highlights GSDMD inhibition as a potential antiinflammatory strategy in inflammasome-driven diseases.
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Affiliation(s)
- Apurva Kanneganti
- Center for Inflammation Research, Vlaams Instituut voor Biotechnologie, Ghent, Belgium.,Department of Internal Medicine, Ghent University, Ghent, Belgium.,Gastrointestinal Unit, Center for Computational and Integrative Biology, Massachusetts General Hospital, Harvard Medical School, Boston, MA.,Department of Pathology, Harvard Medical School, Boston, MA.,Department of Lab Medicine, Boston Children's Hospital, Dana-Farber/Harvard Cancer Center, Boston, MA
| | | | - Pedro H V Saavedra
- Center for Inflammation Research, Vlaams Instituut voor Biotechnologie, Ghent, Belgium.,Department of Internal Medicine, Ghent University, Ghent, Belgium
| | - Lieselotte Vande Walle
- Center for Inflammation Research, Vlaams Instituut voor Biotechnologie, Ghent, Belgium.,Department of Internal Medicine, Ghent University, Ghent, Belgium
| | - Hanne Van Gorp
- Center for Inflammation Research, Vlaams Instituut voor Biotechnologie, Ghent, Belgium.,Department of Internal Medicine, Ghent University, Ghent, Belgium
| | - Hiroto Kambara
- Department of Pathology, Harvard Medical School, Boston, MA.,Department of Lab Medicine, Boston Children's Hospital, Dana-Farber/Harvard Cancer Center, Boston, MA
| | - Heather Tillman
- Department of Pathology, St. Jude Children's Research Hospital, Memphis, TN
| | - Peter Vogel
- Department of Pathology, St. Jude Children's Research Hospital, Memphis, TN
| | - Hongbo R Luo
- Department of Pathology, Harvard Medical School, Boston, MA.,Department of Lab Medicine, Boston Children's Hospital, Dana-Farber/Harvard Cancer Center, Boston, MA
| | - Ramnik J Xavier
- Gastrointestinal Unit, Center for Computational and Integrative Biology, Massachusetts General Hospital, Harvard Medical School, Boston, MA.,Broad Institute of Harvard and MIT, Cambridge, MA
| | - Hongbo Chi
- Department of Immunology, St. Jude Children's Research Hospital, Memphis, TN
| | - Mohamed Lamkanfi
- Center for Inflammation Research, Vlaams Instituut voor Biotechnologie, Ghent, Belgium .,Department of Internal Medicine, Ghent University, Ghent, Belgium
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159
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Khambu B, Huda N, Chen X, Antoine DJ, Li Y, Dai G, Köhler UA, Zong WX, Waguri S, Werner S, Oury TD, Dong Z, Yin XM. HMGB1 promotes ductular reaction and tumorigenesis in autophagy-deficient livers. J Clin Invest 2018; 128:2419-2435. [PMID: 29558368 DOI: 10.1172/jci91814] [Citation(s) in RCA: 71] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2016] [Accepted: 03/13/2018] [Indexed: 12/13/2022] Open
Abstract
Autophagy is important for liver homeostasis, and the deficiency leads to injury, inflammation, ductular reaction (DR), fibrosis, and tumorigenesis. It is not clear how these events are mechanistically linked to autophagy deficiency. Here, we reveal the role of high-mobility group box 1 (HMGB1) in two of these processes. First, HMGB1 was required for DR, which represents the expansion of hepatic progenitor cells (HPCs) implicated in liver repair and regeneration. DR caused by hepatotoxic diets (3,5-diethoxycarbonyl-1,4-dihydrocollidine [DDC] or choline-deficient, ethionine-supplemented [CDE]) also depended on HMGB1, indicating that HMGB1 may be generally required for DR in various injury scenarios. Second, HMGB1 promoted tumor progression in autophagy-deficient livers. Receptor for advanced glycation end product (RAGE), a receptor for HMGB1, was required in the same two processes and could mediate the proliferative effects of HMBG1 in isolated HPCs. HMGB1 was released from autophagy-deficient hepatocytes independently of cellular injury but depended on NRF2 and the inflammasome, which was activated by NRF2. Pharmacological or genetic activation of NRF2 alone, without disabling autophagy or causing injury, was sufficient to cause inflammasome-dependent HMGB1 release. In conclusion, HMGB1 release is a critical mechanism in hepatic pathogenesis under autophagy-deficient conditions and leads to HPC expansion as well as tumor progression.
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Affiliation(s)
- Bilon Khambu
- Department of Pathology and Laboratory Medicine, Indiana University School of Medicine, Indianapolis, Indiana, USA
| | - Nazmul Huda
- Department of Pathology and Laboratory Medicine, Indiana University School of Medicine, Indianapolis, Indiana, USA
| | - Xiaoyun Chen
- Department of Pathology and Laboratory Medicine, Indiana University School of Medicine, Indianapolis, Indiana, USA
| | - Daniel J Antoine
- MRC Center for Inflammation Research, The Queen's Medical Research Institute, The University of Edinburgh, United Kingdom
| | - Yong Li
- Department of Pathology and Laboratory Medicine, Indiana University School of Medicine, Indianapolis, Indiana, USA
| | - Guoli Dai
- Department of Biology, Purdue University School of Science, Indianapolis, Indiana, USA
| | - Ulrike A Köhler
- Department of Biology, Institute of Molecular Health Sciences, Swiss Federal Institute of Technology (ETH) Zurich, Zurich, Switzerland
| | - Wei-Xing Zong
- Department of Chemical Biology, Ernest Mario School of Pharmacy, Rutgers University, New Brunswick, New Jersey, USA
| | - Satoshi Waguri
- Department of Anatomy and Histology, Fukushima Medical University, School of Medicine, Fukushima, Japan
| | - Sabine Werner
- Department of Biology, Institute of Molecular Health Sciences, Swiss Federal Institute of Technology (ETH) Zurich, Zurich, Switzerland
| | - Tim D Oury
- Department of Pathology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
| | - Zheng Dong
- Department of Nephrology, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China.,Department of Cellular Biology and Anatomy, Medical College of Georgia at Augusta University and Charlie Norwood VA Medical Center, Augusta, Georgia, USA
| | - Xiao-Ming Yin
- Department of Pathology and Laboratory Medicine, Indiana University School of Medicine, Indianapolis, Indiana, USA
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160
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Single-cell analysis of pyroptosis dynamics reveals conserved GSDMD-mediated subcellular events that precede plasma membrane rupture. Cell Death Differ 2018; 26:146-161. [PMID: 29666477 PMCID: PMC6294780 DOI: 10.1038/s41418-018-0106-7] [Citation(s) in RCA: 212] [Impact Index Per Article: 35.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2017] [Revised: 02/19/2018] [Accepted: 03/14/2018] [Indexed: 12/04/2022] Open
Abstract
Pyroptosis is rapidly emerging as a mechanism of anti-microbial host defense, and of extracellular release of the inflammasome-dependent cytokines interleukin (IL)-1β and IL-18, which contributes to autoinflammatory pathology. Caspases 1, 4, 5 and 11 trigger this regulated form of necrosis by cleaving the pyroptosis effector gasdermin D (GSDMD), causing its pore-forming amino-terminal domain to oligomerize and perforate the plasma membrane. However, the subcellular events that precede pyroptotic cell lysis are ill defined. In this study, we triggered primary macrophages to undergo pyroptosis from three inflammasome types and recorded their dynamics and morphology using high-resolution live-cell spinning disk confocal laser microscopy. Based on quantitative analysis of single-cell subcellular events, we propose a model of pyroptotic cell disintegration that is initiated by opening of GSDMD-dependent ion channels or pores that are more restrictive than recently proposed GSDMD pores, followed by osmotic cell swelling, commitment of mitochondria and other membrane-bound organelles prior to sudden rupture of the plasma membrane and full permeability to intracellular proteins. This study provides a dynamic framework for understanding cellular changes that occur during pyroptosis, and charts a chronological sequence of GSDMD-mediated subcellular events that define pyroptotic cell death at the single-cell level.
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161
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Coleman LG, Maile R, Jones SW, Cairns BA, Crews FT. HMGB1/IL-1β complexes in plasma microvesicles modulate immune responses to burn injury. PLoS One 2018; 13:e0195335. [PMID: 29601597 PMCID: PMC5877880 DOI: 10.1371/journal.pone.0195335] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2018] [Accepted: 03/20/2018] [Indexed: 01/08/2023] Open
Abstract
Modulating immune responses to sepsis and trauma remain one of the most difficult challenges in modern medicine. Large burn injuries (LBI) are a severe form of trauma associated with sepsis, immune impairment, and mortality. Immune dysfunction after LBI is complex, involving both enhanced and impaired immune activation. The release of Damage-Associated Molecular Patterns (DAMPs), such as HMGB1, and cytokines (e.g. IL-1β) creates an environment of immune dysfunction often leading to end organ failure and death. Both HMGB1 and IL-1β have been found to play critical roles in sepsis and post-burn immune dysfunction. HMGB1 and IL-1β have been shown previously to form potent complexes in vitro. We recently identified the presence of HMGB1/IL-1β heterocomplexes in human tissue. We now find HMGB1/IL-1β complexes in human and mouse plasma, and identify a synergistic role of HMGB1/IL-1β complexes in post-burn immune dysfunction. In both humans and mice, we found that HMGB1 was enriched in plasma microvesicles (MVs) after LBI. HMGB1 was found form complexes with IL-1β. Using flow cytometry of mouse plasma MVs, we identified an increase in an HMGB1+/IL-1β+ MVs. Using co-IP, HMGB1 was found to bind the pro-form of IL-1β in mouse and human plasma. Pro-IL-1β, which is traditionally considered inactive, became active when complexed with HMGB1. Human THP-1 monocytes treated with HMGB1-pro-IL-1β complexes showed increased transcription of LBI associated cytokines IL-6 and IFNβ along with suppression of iNOS, mimicking findings associated with LBI. These findings identify that HMGB1/IL-1β complexes released after burn injuries can modulate immune responses, and microvesicles are identified as a novel reservoir for these immune mediators. These complexes might serve as novel immune targets for the treatment of systemic immune responses due to LBI or other causes of sepsis.
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Affiliation(s)
- Leon G Coleman
- Department of Pharmacology, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States of America.,Bowles Center for Alcohol Studies, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States of America
| | - Robert Maile
- North Carolina Jaycee Burn Center, Department of Surgery, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States of America.,Department of Microbiology and Immunology, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States of America
| | - Samuel W Jones
- North Carolina Jaycee Burn Center, Department of Surgery, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States of America
| | - Bruce A Cairns
- North Carolina Jaycee Burn Center, Department of Surgery, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States of America.,Department of Microbiology and Immunology, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States of America
| | - Fulton T Crews
- Department of Pharmacology, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States of America.,Bowles Center for Alcohol Studies, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States of America
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162
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Liu YH, Chang YC, Chen LK, Su PA, Ko WC, Tsai YS, Chen YH, Lai HC, Wu CY, Hung YP, Tsai PJ. The ATP-P2X 7 Signaling Axis Is an Essential Sentinel for Intracellular Clostridium difficile Pathogen-Induced Inflammasome Activation. Front Cell Infect Microbiol 2018; 8:84. [PMID: 29616195 PMCID: PMC5864904 DOI: 10.3389/fcimb.2018.00084] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2017] [Accepted: 02/28/2018] [Indexed: 12/12/2022] Open
Abstract
Clostridium difficile infection (CDI) is the leading cause of nosocomial infection in hospitalized patients receiving long-term antibiotic treatment. An excessive host inflammatory response is believed to be the major mechanism underlying the pathogenesis of C. difficile infection, and various proinflammatory cytokines such as IL-1β are detected in patients with C. difficile infection. IL-1β is known to be processed by caspase-1, a cysteine protease that is regulated by a protein complex called the inflammasome, which leads to a specialized form of cell death called pyroptosis. The function of inflammasome activation-induced pyroptosis is to clear or limit the spread of invading pathogens via infiltrated neutrophils. Here, we focused on inflammasome activation induced by intact C. difficile to re-evaluate the nature of inflammasome activation in CDI pathogenesis, which could provide information that leads to an alternative therapeutic strategy for the treatment of this condition in humans. First, we found that caspase-1-dependent IL-1β production was induced by C. difficile pathogens in macrophages and increased in a time-dependent manner. Moreover, intracellular toxigenic C. difficile was essential for ATP-P2X7 pathway of inflammasome activation and subsequent caspase-1-dependent pyroptotic cell death, leading to the loss of membrane integrity and release of intracellular contents such as LDH. Notably, we also observed that bacterial components such as surface layer proteins (SLPs) were released from pyroptotic cells. In addition, pro-IL-1β production was completely MyD88 and partially TLR2 dependent. Finally, to investigate the role of the caspase-1-dependent inflammasome in host defense, we found that colonic inflammasome activation was also induced by CDI and that caspase-1 inhibition by Ac-YVAD-CMK led to increased disease progression and C. difficile load. Taken together, the present results suggest that MyD88 and TLR2 are critical component in pro-IL-1β production and intracellular C. difficile following the ATP-P2X7 pathway of inflammasome activation and pyroptosis, which play important roles in host defense through the utilization of inflammation-mediated bacterial clearance mechanisms during C. difficile infection.
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Affiliation(s)
- Ya-Hui Liu
- Department of Medical Laboratory Science and Biotechnology, Medical College, National Cheng Kung University, Tainan, Taiwan.,Department of Pathology, National Cheng Kung University Hospital, Tainan, Taiwan
| | - Yung-Chi Chang
- Department of Medical Laboratory Science and Biotechnology, Medical College, National Cheng Kung University, Tainan, Taiwan
| | - Liang-Kuei Chen
- Department of Medical Laboratory Science and Biotechnology, Medical College, National Cheng Kung University, Tainan, Taiwan
| | - Po-An Su
- Division of Infectious Diseases, Chi Mei Medical Center, Tainan, Taiwan.,Department of Pharmacy, Chia Nan University of Pharmacy and Science, Tainan, Taiwan
| | - Wen-Chien Ko
- Department of Internal Medicine, National Cheng Kung University Hospital, Tainan, Taiwan.,Center for Infection Control, National Cheng Kung University Hospital, Tainan, Taiwan.,Department of Medicine, Medical College, National Cheng Kung University, Tainan, Taiwan
| | - Yau-Sheng Tsai
- Institute of Clinical Medicine, Medical College, National Cheng Kung University, Tainan, Taiwan.,Cardiovascular Research Center, Medical College, National Cheng Kung University, Tainan, Taiwan
| | - Yi-Hsuan Chen
- Department of Medical Laboratory Science and Biotechnology, Medical College, National Cheng Kung University, Tainan, Taiwan
| | - Hsin-Chih Lai
- Department of Medical Laboratory Science and Biotechnology, Chang Gung University, Taoyaun, Taiwan.,Research Center for Industry of Human Ecology, College of Human Ecology, Chang Gung University of Science and Technology, Taoyaun, Taiwan.,Graduate Institute of Health Industry and Technology, College of Human Ecology, Chang Gung University of Science and Technology, Taoyaun, Taiwan
| | - Cheng-Yeu Wu
- Center for Molecular and Clinical Immunology, Chang Gung University, Taoyaun, Taiwan.,Research Center of Bacterial Pathogenesis, Chang Gung University, Taoyaun, Taiwan
| | - Yuan-Pin Hung
- Department of Internal Medicine, Tainan Hospital, Ministry of Health and Welfare, Tainan, Taiwan
| | - Pei-Jane Tsai
- Department of Medical Laboratory Science and Biotechnology, Medical College, National Cheng Kung University, Tainan, Taiwan.,Department of Pathology, National Cheng Kung University Hospital, Tainan, Taiwan.,Center of Infectious Disease and Signaling Research, National Cheng Kung University, Tainan, Taiwan
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163
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Li S, Liang F, Kwan K, Tang Y, Wang X, Tang Y, Li J, Yang H, Chavan SS, Wang H, Andersson U, Lu B, Tracey KJ. Identification of ethyl pyruvate as a NLRP3 inflammasome inhibitor that preserves mitochondrial integrity. Mol Med 2018; 24:8. [PMID: 30134814 PMCID: PMC6016887 DOI: 10.1186/s10020-018-0006-9] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2018] [Accepted: 02/13/2018] [Indexed: 11/10/2022] Open
Abstract
Background The NLRP3 inflammasome, a cytosolic complex that mediates the maturation of IL-1β and IL-18 as well as the release of high mobility group box 1 (HMGB1), contributes to the lethality of endotoxic shock. Ethyl pyruvate (EP) was previously shown to inhibit HMGB1 release and promote survival during endotoxemia and experimental sepsis. However, the underlying protective mechanism remains elusive. Result EP dose-dependently inhibited the ATP-, nigericin-, alum-, and silica-induced caspase-1 activation and HMGB1 release in mouse macrophages. EP failed to inhibit DNA transfection- or Salmonella Typhimurium-induced caspase-1 activation and HMGB1 release. Mechanistically, EP significantly attenuated mitochondrial damage and cytoplasmic translocation of mitochondrial DNA, a known NLRP3 ligand, without influencing the potassium efflux, the lysosomal rupture or the production of mitochondrial reactive oxygen species (mtROS). Conclusion Ethyl pyruvate acts as a novel NLRP3 inflammasome inhibitor that preserves the integrity of mitochondria during inflammation.
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Affiliation(s)
- Sujun Li
- Department of Hematology and Key Laboratory of non-resolving inflammation and cancer of Human Province, The 3rd Xiangya Hospital, Central South University, Changsha, Hunan province, 410000, People's Republic of China
| | - Fang Liang
- Department of Hematology and Key Laboratory of non-resolving inflammation and cancer of Human Province, The 3rd Xiangya Hospital, Central South University, Changsha, Hunan province, 410000, People's Republic of China
| | - Kevin Kwan
- Laboratory of Biomedical Science, Feinstein Institute for Medical Research, 350 Community Drive, Manhasset, NY, 11030, USA
| | - Yiting Tang
- Department of Physiology, School of Basic medical research, Central South University, Changsha, Hunan province, People's Republic of China.,Key Laboratory of Medical Genetics, School of Biological Science and Technology, Central South University, Changsha, Hunan province, 410000, People's Republic of China
| | - Xiangyu Wang
- Department of Hematology and Key Laboratory of non-resolving inflammation and cancer of Human Province, The 3rd Xiangya Hospital, Central South University, Changsha, Hunan province, 410000, People's Republic of China.,Key Laboratory of Medical Genetics, School of Biological Science and Technology, Central South University, Changsha, Hunan province, 410000, People's Republic of China
| | - Youzhou Tang
- Department of Hematology and Key Laboratory of non-resolving inflammation and cancer of Human Province, The 3rd Xiangya Hospital, Central South University, Changsha, Hunan province, 410000, People's Republic of China
| | - Jianhua Li
- Laboratory of Biomedical Science, Feinstein Institute for Medical Research, 350 Community Drive, Manhasset, NY, 11030, USA
| | - Huan Yang
- Laboratory of Biomedical Science, Feinstein Institute for Medical Research, 350 Community Drive, Manhasset, NY, 11030, USA
| | - Sangeeta S Chavan
- Laboratory of Biomedical Science, Feinstein Institute for Medical Research, 350 Community Drive, Manhasset, NY, 11030, USA
| | - Haichao Wang
- Department of Emergency Medicine, North Shore University Hospital, Manhasset, NY, 11030, USA
| | - Ulf Andersson
- Department of Women's and Children's Health, Karolinska Institute, 171 76, Stockholm, Sweden
| | - Ben Lu
- Department of Hematology and Key Laboratory of non-resolving inflammation and cancer of Human Province, The 3rd Xiangya Hospital, Central South University, Changsha, Hunan province, 410000, People's Republic of China. .,Key Laboratory of Medical Genetics, School of Biological Science and Technology, Central South University, Changsha, Hunan province, 410000, People's Republic of China.
| | - Kevin J Tracey
- Laboratory of Biomedical Science, Feinstein Institute for Medical Research, 350 Community Drive, Manhasset, NY, 11030, USA.
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164
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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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165
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Barrington J, Lemarchand E, Allan SM. A brain in flame; do inflammasomes and pyroptosis influence stroke pathology? Brain Pathol 2018; 27:205-212. [PMID: 27997059 DOI: 10.1111/bpa.12476] [Citation(s) in RCA: 112] [Impact Index Per Article: 18.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2016] [Accepted: 12/14/2016] [Indexed: 12/21/2022] Open
Abstract
Stroke is one of the leading causes of death and disability worldwide. Inflammation plays a key role across the time course of stroke, from onset to the post-injury reparative phase days to months later. Several regulatory molecules are implicated in inflammation, but the most established inflammatory mediator of acute brain injury is the cytokine interleukin-1. Interleukin-1 is regulated by large, macromolecular complexes called inflammasomes, which play a central role in cytokine release and cell death. In this review we highlight recent advances in inflammasome research and propose key roles for inflammasome components in the progression of stroke damage.
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Affiliation(s)
- Jack Barrington
- Faculty of Biology, Medicine and Health, University of Manchester, AV Hill Building, Oxford Road, Manchester, M13 9PT, United Kingdom
| | - Eloise Lemarchand
- Faculty of Biology, Medicine and Health, University of Manchester, AV Hill Building, Oxford Road, Manchester, M13 9PT, United Kingdom
| | - Stuart M Allan
- Faculty of Biology, Medicine and Health, University of Manchester, AV Hill Building, Oxford Road, Manchester, M13 9PT, United Kingdom
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166
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Andersson U, Yang H, Harris H. Extracellular HMGB1 as a therapeutic target in inflammatory diseases. Expert Opin Ther Targets 2018; 22:263-277. [PMID: 29447008 DOI: 10.1080/14728222.2018.1439924] [Citation(s) in RCA: 207] [Impact Index Per Article: 34.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
INTRODUCTION High-mobility group box 1 (HMGB1) is a ubiquitous nuclear protein that promotes inflammation when released extracellularly after cellular activation, stress, damage or death. HMGB1 operates as one of the most intriguing molecules in inflammatory disorders via recently elucidated signal and molecular transport mechanisms. Treatments based on antagonists specifically targeting extracellular HMGB1 have generated encouraging results in a wide number of experimental models of infectious and sterile inflammation. Clinical studies are still to come. Areas covered: We here summarize recent advances regarding pathways for extracellular HMGB1 release, receptor usage, and functional consequences of post-translational modifications. The review also addresses results of preclinical HMGB1-targeted therapy studies in multiple inflammatory conditions and outlines the current status of emerging clinical HMGB1-specific antagonists. Expert opinion: Blocking excessive amounts of extracellular HMGB1, particularly the disulfide isoform, offers an attractive clinical opportunity to ameliorate systemic inflammatory diseases. Therapeutic interventions to regulate intracellular HMGB1 biology must still await a deeper understanding of intracellular HMGB1 functions. Future work is needed to create more robust assays to evaluate functional bioactivity of HMGB1 antagonists. Forthcoming clinical studies would also greatly benefit from a development of antibody-based assays to quantify HMGB1 redox isoforms, presently assessed by mass spectrometry methods.
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Affiliation(s)
- Ulf Andersson
- a Department of Women's and Children's Health, Center for Molecular Medicine (CMM) L8:04, Karolinska Institutet , Karolinska University Hospital , Stockholm , Sweden
| | - Huan Yang
- b Laboratory of Biomedical Science , The Feinstein Institute for Medical Research , Manhasset , NY , USA
| | - Helena Harris
- c Unit of Rheumatology, Department of Medicine, Center for Molecular Medicine (CMM) L, 8:04, Karolinska Institutet , Karolinska University Hospital , Stockholm , Sweden
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167
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Romão-Veiga M, Matias ML, Ribeiro VR, Nunes PR, M Borges VT, Peraçoli JC, Peraçoli MTS. Induction of systemic inflammation by hyaluronan and hsp70 in women with pre-eclampsia. Cytokine 2018; 105:23-31. [PMID: 29438905 DOI: 10.1016/j.cyto.2018.02.007] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2017] [Revised: 02/02/2018] [Accepted: 02/03/2018] [Indexed: 12/20/2022]
Abstract
Pre-eclampsia (PE) is a human pregnancy syndrome with abnormal activation of the innate immune response. The study evaluated the involvement of molecular structures called damage-associated molecular patterns (DAMPs), such as hyaluronan (HA) and heat shock proteins (Hsp) on NLRP1 and NLRP3 inflammasomes activation in peripheral blood monocytes. Twenty pre-eclamptic women, 20 normotensive pregnant women (NT) and 20 non-pregnant women (NP) were studied. Enzyme immunoassay was employed for the determination of HA, Hsp70 and High mobility group Box 1 (HMGB1) in plasma, as well as for the detection of Interleukin-1β (IL-1β), IL-18 and tumor necrosis factor alpha (TNF-α) in the supernatant of monocytes cultured with or without HA and Hsp70. The inflammasomes induction was evaluated by the quantification of mRNA for NLRP1, NLRP3, caspase-1, IL-1β, IL-18, HMGB1 and TNF-α by qPCR in monocyte culture. The results showed significantly higher plasma levels of HA, Hsp70 and HMGB1 in pre-eclamptic women than in NT and NP women. Monocytes from women with PE showed endogenous activation of NLRP1 and NLRP3 inflammasomes, and expressed high amounts of IL-1β, IL-18, HMGB1 and TNF-α. The stimulation of monocytes with HA increased the gene expression of NLRP1, NLRP3, caspase-1, TNF-α, IL-1β, HMGB1 and IL-18 and the production of IL-1β in pre-eclamptic women. Monocytes cultured with Hsp70 produced elevated levels of IL-1β and TNF-α through a mechanism independent of inflammasomes activation. These results suggest the participation of these DAMPs in the systemic inflammatory response that is characteristic of PE.
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Affiliation(s)
- Mariana Romão-Veiga
- Department of Microbiology and Immunology, Institute of Biosciences, Botucatu, São Paulo State University - UNESP, Botucatu, São Paulo, Brazil.
| | - Mariana Leticia Matias
- Department of Gynaecology and Obstetrics, Botucatu Medical School, Botucatu, São Paulo State University - UNESP, Botucatu, São Paulo, Brazil
| | - Vanessa Rocha Ribeiro
- Department of Gynaecology and Obstetrics, Botucatu Medical School, Botucatu, São Paulo State University - UNESP, Botucatu, São Paulo, Brazil
| | - Priscila Rezeck Nunes
- Department of Gynaecology and Obstetrics, Botucatu Medical School, Botucatu, São Paulo State University - UNESP, Botucatu, São Paulo, Brazil
| | - Vera Therezinha M Borges
- Department of Gynaecology and Obstetrics, Botucatu Medical School, Botucatu, São Paulo State University - UNESP, Botucatu, São Paulo, Brazil
| | - José Carlos Peraçoli
- Department of Gynaecology and Obstetrics, Botucatu Medical School, Botucatu, São Paulo State University - UNESP, Botucatu, São Paulo, Brazil
| | - Maria Terezinha S Peraçoli
- Department of Microbiology and Immunology, Institute of Biosciences, Botucatu, São Paulo State University - UNESP, Botucatu, São Paulo, Brazil
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168
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Park IA, Heo SH, Song IH, Kim YA, Park HS, Bang WS, Park SY, Jo JH, Lee HJ, Gong G. Endoplasmic reticulum stress induces secretion of high-mobility group proteins and is associated with tumor-infiltrating lymphocytes in triple-negative breast cancer. Oncotarget 2018; 7:59957-59964. [PMID: 27494867 PMCID: PMC5312361 DOI: 10.18632/oncotarget.11010] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2016] [Accepted: 07/19/2016] [Indexed: 11/25/2022] Open
Abstract
Background Although the prognostic and predictive significance of tumor-infiltrating lymphocytes (TILs) in triple-negative breast cancer (TNBC) have been shown, the cause of the TIL influx is unclear. Here, we investigated whether extracellular secretion of HMGN1 is associated with TIL influx, as well as increased endoplasmic reticulum stress (ERS), in human TNBC. Methods We reviewed the slides of 767 patients with TNBC and evaluated the TIL levels. We also assessed the expression of HMGs and several ERS-associated molecules using immunohistochemical staining. Western blot analysis of human TNBC cell lines and pharmacological ERS inducers was used to determine if HMGN1 migrates from the nucleus to the extracellular space in response to ERS. Results On immunohistochemical staining, either higher nuclear or cytoplasmic expression of both HMGB1 and HMGN1 was significantly associated with ERS. TILs showed a positive correlation with the cytoplasmic expression of the HMGs. Western blot analysis of TNBC cell lines showed that ERS induction resulted in the secretion of HMG proteins. Conclusions This is the first study to elucidate the associations among ERS, secretion of HMGs, and degree of TILs in TNBCs. Understanding the mechanisms of TIL influx will help in the development of effective immunotherapeutic agents for TNBC.
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Affiliation(s)
- In Ah Park
- Department of Pathology, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea
| | - Sun-Hee Heo
- Department of Pathology, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea.,Asan Center for Cancer Genome Discovery, Asan Institute for Life Sciences, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea
| | - In Hye Song
- Department of Pathology, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea
| | - Young-Ae Kim
- Department of Pathology, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea.,Asan Center for Cancer Genome Discovery, Asan Institute for Life Sciences, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea
| | - Hye Seon Park
- Department of Pathology, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea.,Asan Center for Cancer Genome Discovery, Asan Institute for Life Sciences, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea
| | - Won Seon Bang
- Department of Pathology, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea.,Asan Center for Cancer Genome Discovery, Asan Institute for Life Sciences, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea
| | - Suk Young Park
- Department of Pathology, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea.,Asan Center for Cancer Genome Discovery, Asan Institute for Life Sciences, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea
| | - Jeong-Hyon Jo
- Department of Pathology, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
| | - Hee Jin Lee
- Department of Pathology, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea
| | - Gyungyub Gong
- Department of Pathology, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea
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Mori H, Murakami M, Tsuda T, Kameda K, Utsunomiya R, Masuda K, Shiraishi K, Dai X, Tohyama M, Nakaoka H, Sayama K. Reduced-HMGB1 suppresses poly(I:C)-induced inflammation in keratinocytes. J Dermatol Sci 2018; 90:154-165. [PMID: 29395576 DOI: 10.1016/j.jdermsci.2018.01.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2017] [Revised: 01/18/2018] [Accepted: 01/19/2018] [Indexed: 01/09/2023]
Abstract
BACKGROUND High mobility group box 1 (HMGB1) is a nuclear protein that stabilizes DNA and facilitates gene transcription. Additionally, cell stress or death induces the release of HMGB1 outside the cell membrane, where HMGB1 functions as an alarmin, causing an inflammatory response in combination with other cytokines, damage-associated molecular patterns (DAMPs), and pathogen-associated molecular patterns (PAMPs). OBJECTIVE To evaluate the effect of reduced-HMGB1 (previously termed chemoattractive-HMGB1) on polyinosine-polycytidylic acid [poly(I:C)]-induced inflammation in normal human keratinocytes (NHKs). METHODS We focused on downstream components of the poly(I:C)-Toll-like receptor 3 (TLR3), retinoic acid-inducible gene-I (RIG-I), and melanoma differentiation-associated protein 5 (MDA5) pathways, including IκBα, nuclear factor (NF)-κB p65, mitogen-activated protein kinase (MAPK), and interferon regulatory factor 3 (IRF3), and assessed whether these pathways are involved in the suppression of poly(I:C)-induced inflammation in NHKs by HMGB1. An immunoprecipitation was performed to know whether HMGB1 could bind to poly(I:C), and immunofluorescence staining and flow cytometric analysis were performed to check whether reduced-HMGB interferes with cellular uptake of poly(I:C) translocation (possibly by endocytosis). RESULTS Application of exogenous HMGB1 before, but not after, exerted a suppressive effect on poly(I:C)-induced inflammation in NHKs. In addition, reduced-HMGB1, but not disulfide-HMGB1, exerted a suppressive effect on poly(I:C)-induced inflammation in NHKs, suggesting the importance of the redox status of exogenous HMGB1. Pre-treatment with reduced-HMGB1 inhibited the phosphorylation of IκBα, NF-κB p65, and IRF3 induced by poly(I:C) stimulation in NHKs; however, phosphorylation of p38, extracellular signal-regulated kinase (ERK), and c-Jun N-terminal kinase (JNK) was unaffected. Disulfide-HMGB1 formed a complex with poly(I:C), as did reduced- and oxidized-HMGB1, albeit to a lesser extent. Immunofluorescence staining and flow cytometric analysis indicated that reduced-HMGB interferes with cellular uptake of poly(I:C) translocation (possibly by endocytosis). CONCLUSION These findings suggest that pre-treatment with reduced-HMGB1 ameliorates poly(I:C)-mediated inflammation in NHKs.
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Affiliation(s)
- Hideki Mori
- Department of Dermatology, Ehime University Graduate School of Medicine, Ehime, Japan
| | - Masamoto Murakami
- Department of Dermatology, Ehime University Graduate School of Medicine, Ehime, Japan.
| | - Teruko Tsuda
- Department of Dermatology, Ehime University Graduate School of Medicine, Ehime, Japan
| | - Kenji Kameda
- Advanced Research Support Center, Ehime University Graduate School of Medicine, Ehime, Japan
| | - Ryo Utsunomiya
- Department of Dermatology, Ehime University Graduate School of Medicine, Ehime, Japan
| | - Kana Masuda
- Department of Dermatology, Ehime University Graduate School of Medicine, Ehime, Japan
| | - Ken Shiraishi
- Department of Dermatology, Ehime University Graduate School of Medicine, Ehime, Japan
| | - Xiuju Dai
- Department of Dermatology, Ehime University Graduate School of Medicine, Ehime, Japan
| | - Mikiko Tohyama
- Department of Dermatology, Ehime University Graduate School of Medicine, Ehime, Japan
| | - Hiroki Nakaoka
- Department of Dermatology, Ehime University Graduate School of Medicine, Ehime, Japan
| | - Koji Sayama
- Department of Dermatology, Ehime University Graduate School of Medicine, Ehime, Japan
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170
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Pizato N, Luzete BC, Kiffer LFMV, Corrêa LH, de Oliveira Santos I, Assumpção JAF, Ito MK, Magalhães KG. Omega-3 docosahexaenoic acid induces pyroptosis cell death in triple-negative breast cancer cells. Sci Rep 2018; 8:1952. [PMID: 29386662 PMCID: PMC5792438 DOI: 10.1038/s41598-018-20422-0] [Citation(s) in RCA: 138] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2017] [Accepted: 01/18/2018] [Indexed: 02/07/2023] Open
Abstract
The implication of inflammation in pathophysiology of several type of cancers has been under intense investigation. Omega-3 fatty acids can modulate inflammation and present anticancer effects, promoting cancer cell death. Pyroptosis is an inflammation related cell death and so far, the function of docosahexaenoic acid (DHA) in pyroptosis cell death has not been described. This study investigated the role of DHA in triggering pyroptosis activation in breast cancer cells. MDA-MB-231 breast cancer cells were supplemented with DHA and inflammation cell death was analyzed. DHA-treated breast cancer cells triggered increased caspase-1and gasdermin D activation, enhanced IL-1β secretion, translocated HMGB1 towards the cytoplasm, and membrane pore formation when compared to untreated cells, suggesting DHA induces pyroptosis programmed cell death in breast cancer cells. Moreover, caspase-1 inhibitor (YVAD) could protect breast cancer cells from DHA-induced pyroptotic cell death. In addition, membrane pore formation showed to be a lysosomal damage and ROS formation-depended event in breast cancer cells. DHA triggered pyroptosis cell death in MDA-MB-231by activating several pyroptosis markers in these cells. This is the first study that shows the effect of DHA triggering pyroptosis programmed cell death in breast cancer cells and it could improve the understanding of the omega-3 supplementation during breast cancer treatment.
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Affiliation(s)
- Nathalia Pizato
- Department of Nutrition, University of Brasilia, Brasilia, 70910-900, Brazil
| | | | | | - Luís Henrique Corrêa
- Laboratory of Immunology and Inflammation, University of Brasilia, Brasilia, 70910-900, Brazil
| | - Igor de Oliveira Santos
- Laboratory of Immunology and Inflammation, University of Brasilia, Brasilia, 70910-900, Brazil
| | | | - Marina Kiyomi Ito
- Department of Nutrition, University of Brasilia, Brasilia, 70910-900, Brazil
| | - Kelly Grace Magalhães
- Laboratory of Immunology and Inflammation, University of Brasilia, Brasilia, 70910-900, Brazil.
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Interferon Regulatory Factor-1 Mediates Alveolar Macrophage Pyroptosis During LPS-Induced Acute Lung Injury in Mice. Shock 2018; 46:329-38. [PMID: 26939040 PMCID: PMC4978602 DOI: 10.1097/shk.0000000000000595] [Citation(s) in RCA: 56] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Previously, we demonstrated that pyroptosis in alveolar macrophages (AMs) plays an essential role in lipopolysaccharide (LPS)-induced acute lung injury. However, the underlying mechanism remains largely unclear. Here, we show that the absence of interferon regulatory factor 1 (IRF-1) in genetic knock-out mice strongly abrogates pyroptosis in AMs and alleviates the LPS-induced lung injury and systemic inflammation. Our study demonstrates that IRF-1 contributes to caspase-1 activation and apoptosis-associated speck-like protein containing a caspase activation and recruitment domain pyroptosome formation in AMs and leads to downstream inflammatory cytokine release, including that of IL-1β, IL-18, and HMGB1. The nuclear translocation of IRF-1 is linked to the presence of toll-like receptor 4 (TLR4). Our findings suggest that pyroptosis and the downstream inflammatory response in AMs induced by LPS is a process that is dependent on TLR4-mediated up-regulation of IRF-1. In summary, IRF-1 plays a key role in controlling caspase-1-dependent pyroptosis and inflammation.
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172
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Abstract
BACKGROUND Melioidosis, caused by the gram-negative bacterium Burkholderia pseudomallei, is a common cause of community-acquired sepsis in Southeast Asia and Northern Australia. The NLRP3 inflammasome and its downstream product interleukin-1 beta (IL-1β) have been proposed to play crucial roles in melioidosis. In this study, we characterized the role of IL-1β more closely and we assessed its therapeutic potential. METHODS mRNA expression of inflammasome components was determined in isolated leukocytes of 32 healthy controls and 34 patients with sepsis caused by B pseudomallei.Wild-type (WT), NLRP3-deficient (Nlrp3), and Asc mice were infected with B pseudomallei. In additional experiments, infected WT mice were treated with an anti-IL-1β antibody. After 24, 48, and 72 hours (h) mice were sacrificed and organs were harvested. Furthermore, survival studies were performed. RESULTS Patients with melioidosis exhibited lower mRNA levels of caspase-1, NLRP3, and ASC. Bacterial dissemination and organ damage were increased in B pseudomallei-infected Nlrp3 and Asc mice, together with a reduced pulmonary cell influx. Anti-IL-1β treatment of B pseudomallei challenged mice resulted in strongly reduced bacterial counts, organ damage, and pulmonary granulocyte influx together with reduced mortality. Postponement of anti-IL-1β treatment for 24 h postinfection still protected mice during melioidosis. CONCLUSION Expression of caspase-1, NLRP3, and ASC is altered in melioidosis patients. In mice, both NLRP3 and ASC contribute to the host defense against melioidosis. Anti-IL-1β treatment protects mice against B pseudomallei infection and might be a novel treatment strategy in melioidosis.
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173
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McDougal CE, Sauer JD. Listeria monocytogenes: The Impact of Cell Death on Infection and Immunity. Pathogens 2018; 7:pathogens7010008. [PMID: 29324702 PMCID: PMC5874734 DOI: 10.3390/pathogens7010008] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2017] [Revised: 12/28/2017] [Accepted: 01/03/2018] [Indexed: 02/07/2023] Open
Abstract
Listeria monocytogenes has evolved exquisite mechanisms for invading host cells and spreading from cell-to-cell to ensure maintenance of its intracellular lifecycle. As such, it is not surprising that loss of the intracellular replication niche through induction of host cell death has significant implications on the development of disease and the subsequent immune response. Although L. monocytogenes can activate multiple pathways of host cell death, including necrosis, apoptosis, and pyroptosis, like most intracellular pathogens L. monocytogenes has evolved a series of adaptations that minimize host cell death to promote its virulence. Understanding how L. monocytogenes modulates cell death during infection could lead to novel therapeutic approaches. In addition, as L. monocytogenes is currently being developed as a tumor immunotherapy platform, understanding how cell death pathways influence the priming and quality of cell-mediated immunity is critical. This review will focus on the mechanisms by which L. monocytogenes modulates cell death, as well as the implications of cell death on acute infection and the generation of adaptive immunity.
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Affiliation(s)
- Courtney E McDougal
- Department of Medical Microbiology and Immunology, School of Medicine and Public Health, University of Wisconsin-Madison, Madison, WI 53706, USA.
| | - John-Demian Sauer
- Department of Medical Microbiology and Immunology, School of Medicine and Public Health, University of Wisconsin-Madison, Madison, WI 53706, USA.
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174
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Li W, Bao G, Chen W, Qiang X, Zhu S, Wang S, He M, Ma G, Ochani M, Al-Abed Y, Yang H, Tracey KJ, Wang P, D'Angelo J, Wang H. Connexin 43 Hemichannel as a Novel Mediator of Sterile and Infectious Inflammatory Diseases. Sci Rep 2018; 8:166. [PMID: 29317708 PMCID: PMC5760527 DOI: 10.1038/s41598-017-18452-1] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2017] [Accepted: 12/12/2017] [Indexed: 12/29/2022] Open
Abstract
Cytoplasmic membrane-bound connexin 43 (Cx43) proteins oligomerize into hexameric channels (hemichannels) that can sometimes dock with hemichannels on adjacent cells to form gap junctional (GJ) channels. However, the possible role of Cx43 hemichannels in sterile and infectious inflammatory diseases has not been adequately defined due to the lack of selective interventions. Here we report that a proinflammatory mediator, the serum amyloid A (SAA), resembled bacterial endotoxin by stimulating macrophages to up-regulate Cx43 expression and double-stranded RNA-activated protein kinase R (PKR) phosphorylation in a TLR4-dependent fashion. Two well-known Cx43 mimetic peptides, the GAP26 and TAT-GAP19, divergently affected macrophage hemichannel activities in vitro, and differentially altered the outcome of lethal sepsis in vivo. By screening a panel of Cx43 mimetic peptides, we discovered that one cysteine-containing peptide, P5 (ENVCYD), effectively attenuated hemichannel activities, and significantly suppressed endotoxin-induced release of ATP and HMGB1 in vitro. In vivo, the P5 peptide conferred a significant protection against hepatic ischemia/reperfusion injury and lethal microbial infection. Collectively, these findings have suggested a pathogenic role of Cx43 hemichannels in sterile injurious as well as infectious inflammatory diseases possibly through facilitating extracellular ATP efflux to trigger PKR phosphorylation/activation.
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Affiliation(s)
- Wei Li
- Department of Emergency Medicine, North Shore University Hospital, Northwell Health, Manhasset, NY, 11030, USA. .,The Feinstein Institute for Medical Research, 350 Community Drive, Manhasset, NY, 11030, USA. .,International Laboratory for Sepsis Research, Huaihe Hospital, Henan University, Kaifeng, Henan, 475000, China.
| | - Guoqiang Bao
- The Feinstein Institute for Medical Research, 350 Community Drive, Manhasset, NY, 11030, USA.,Department of General Surgery, Tangdu Hospital, The 4th Military Medical University, Xi'an, Shaanxi, 710032, China
| | - Weiqiang Chen
- Department of Emergency Medicine, North Shore University Hospital, Northwell Health, Manhasset, NY, 11030, USA.,The Feinstein Institute for Medical Research, 350 Community Drive, Manhasset, NY, 11030, USA
| | - Xiaoling Qiang
- Department of Emergency Medicine, North Shore University Hospital, Northwell Health, Manhasset, NY, 11030, USA.,The Feinstein Institute for Medical Research, 350 Community Drive, Manhasset, NY, 11030, USA
| | - Shu Zhu
- Department of Emergency Medicine, North Shore University Hospital, Northwell Health, Manhasset, NY, 11030, USA.,The Feinstein Institute for Medical Research, 350 Community Drive, Manhasset, NY, 11030, USA
| | - Shuaiwei Wang
- International Laboratory for Sepsis Research, Huaihe Hospital, Henan University, Kaifeng, Henan, 475000, China
| | - Mingzhu He
- The Feinstein Institute for Medical Research, 350 Community Drive, Manhasset, NY, 11030, USA
| | - Gaifeng Ma
- The Feinstein Institute for Medical Research, 350 Community Drive, Manhasset, NY, 11030, USA
| | - Mahendar Ochani
- The Feinstein Institute for Medical Research, 350 Community Drive, Manhasset, NY, 11030, USA
| | - Yousef Al-Abed
- The Feinstein Institute for Medical Research, 350 Community Drive, Manhasset, NY, 11030, USA
| | - Huan Yang
- The Feinstein Institute for Medical Research, 350 Community Drive, Manhasset, NY, 11030, USA
| | - Kevin J Tracey
- The Feinstein Institute for Medical Research, 350 Community Drive, Manhasset, NY, 11030, USA
| | - Ping Wang
- The Feinstein Institute for Medical Research, 350 Community Drive, Manhasset, NY, 11030, USA
| | - John D'Angelo
- Department of Emergency Medicine, North Shore University Hospital, Northwell Health, Manhasset, NY, 11030, USA
| | - Haichao Wang
- Department of Emergency Medicine, North Shore University Hospital, Northwell Health, Manhasset, NY, 11030, USA. .,The Feinstein Institute for Medical Research, 350 Community Drive, Manhasset, NY, 11030, USA.
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175
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176
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Consequences of Epithelial Inflammasome Activation by Bacterial Pathogens. J Mol Biol 2018; 430:193-206. [DOI: 10.1016/j.jmb.2017.03.031] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2017] [Revised: 03/17/2017] [Accepted: 03/19/2017] [Indexed: 01/02/2023]
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177
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Fan Z, Liang Z, Yang H, Pan Y, Zheng Y, Wang X. Tenuigenin protects dopaminergic neurons from inflammation via suppressing NLRP3 inflammasome activation in microglia. J Neuroinflammation 2017; 14:256. [PMID: 29262843 PMCID: PMC5738892 DOI: 10.1186/s12974-017-1036-x] [Citation(s) in RCA: 91] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2017] [Accepted: 12/11/2017] [Indexed: 01/20/2023] Open
Abstract
Background Emerging evidence indicates that nod-like receptor family, pyrin domain-containing 3 (NLRP3) inflammasome-induced inflammation plays a crucial role in the pathogenesis of Parkinson’s disease (PD). Thus, inhibition of NLRP3 inflammasome activation may offer a therapeutic benefit in the treatment of PD. Tenuigenin, a major active component of Polygala tenuifolia, has been shown to have potential anti-inflammatory activity, but the underlying mechanisms remain obscure. Methods In the present study, the 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP)-induced mouse model of PD was established to explore the effect of tenuigenin on dopaminergic neurons in substantia nigra. We next activated NLRP3 inflammasome in both BV2 microglia cells and adult mice to investigate the mechanisms for the neuroprotective effect of tenuigenin. Results We demonstrated that treatment with tenuigenin increased striatal dopaminergic levels and improved motor impairment induced by MPTP. Also, tenuigenin significantly ameliorated the degeneration of dopaminergic neurons and inhibited NLRP3 inflammasome activation in substantia nigra of MPTP mouse model. We further found that tenuigenin reduced intracellular reactive oxygen species (ROS) production and suppressed NLRP3 inflammasome activation, subsequent caspase-1 cleavage, and interleukin-1β secretion in BV2 microglia cells. These data indicate that tenuigenin inhibits the activation of NLRP3 inflammasome via downregulating ROS. Correspondingly, in vivo data showed that tenuigenin attenuates microglia activation induced by lipopolysaccharide (LPS) in substantia nigra via suppressing NLRP3 inflammasome. Conclusions Our findings reveal that tenuigenin protects dopaminergic neurons from inflammation partly through inhibition of NLRP3 inflammasome activation in microglia, and suggest the promising clinical use of tenuigenin for PD therapy.
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Affiliation(s)
- Zheng Fan
- Department of Pharmacology, School of Basic Medical Sciences, Capital Medical University, Beijing, 100069, People's Republic of China
| | - Zhigang Liang
- Department of Neurology, Yantai Yuhuangding Hospital Affiliated to Qingdao University, Yantai, 264000, Shandong, People's Republic of China
| | - Hui Yang
- Core Facility Center, Capital Medical University, Beijing, People's Republic of China
| | - Yuting Pan
- Department of Neurobiology, School of Basic Medical Sciences, Capital Medical University, Beijing, People's Republic of China
| | - Yan Zheng
- Department of Physiology, School of Basic Medical Sciences, Capital Medical University, Beijing, People's Republic of China
| | - Xiaomin Wang
- Department of Neurobiology, School of Basic Medical Sciences, Capital Medical University, Beijing, People's Republic of China. .,Beijing Institute for Brain Disorders, Beijing, People's Republic of China.
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178
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Han N, Kim H, Kim N, Lee W, Jeong H, Kim H, Jeong H. Leucine and glycine dipeptides of porcine placenta ameliorate physical fatigue through enhancing dopaminergic systems. Mol Med Rep 2017; 17:4120-4130. [DOI: 10.3892/mmr.2017.8335] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2017] [Accepted: 11/13/2017] [Indexed: 11/06/2022] Open
Affiliation(s)
- Na‑Ra Han
- Department of Pharmacology, College of Korean Medicine, Graduate School, Kyung Hee University, Seoul 02447, Republic of Korea
| | - Hee‑Yun Kim
- Department of Pharmacology, College of Korean Medicine, Graduate School, Kyung Hee University, Seoul 02447, Republic of Korea
| | - Na‑Rae Kim
- Department of Pharmacology, College of Korean Medicine, Graduate School, Kyung Hee University, Seoul 02447, Republic of Korea
| | - Won‑Kyung Lee
- LG Household and Healthcare Research Park, Daejeon 34114, Republic of Korea
| | - Hyein Jeong
- LG Household and Healthcare Research Park, Daejeon 34114, Republic of Korea
| | - Hyung‑Min Kim
- Department of Pharmacology, College of Korean Medicine, Graduate School, Kyung Hee University, Seoul 02447, Republic of Korea
| | - Hyun‑Ja Jeong
- Department of Food Science and Technology and Research Institute for Basic Science, Hoseo University, Asan, Chungcheongnam‑do 31499, Republic of Korea
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179
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Opitz B. Inflammasome Deficiency Makes Pro-resolving Lipid Mediators Great Again. Am J Respir Crit Care Med 2017; 196:668-669. [PMID: 28914570 DOI: 10.1164/rccm.201702-0402ed] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Affiliation(s)
- Bastian Opitz
- 1 Department of Internal Medicine/Infectious Diseases and Pulmonary Medicine Charité University Medicine Berlin Berlin, Germany
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180
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Seo DW, Cho YI, Gu S, Kim DH, Yi YJ, Lee SM. A hot-water extract of Sanguisorba officinalis ameliorates endotoxin-induced septic shock by inhibiting inflammasome activation. Microbiol Immunol 2017; 62:44-54. [PMID: 29193282 DOI: 10.1111/1348-0421.12557] [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] [Received: 09/04/2017] [Revised: 11/15/2017] [Accepted: 11/24/2017] [Indexed: 11/28/2022]
Abstract
The inflammasome is a multiprotein signaling complex that mediates inflammatory innate immune responses through caspase 1 activation and subsequent IL-1β secretion. However, because its aberrant activation often leads to inflammatory diseases, targeting the inflammasome holds promise for the treatment of inflammation-related diseases. In this study, it was found that a hot-water extract of Sanguisorba officinalis (HSO) suppresses inflammasome activation triggered by adenosine 5'-triphosphate, nigericin, microbial pathogens, and double stranded DNA in bone marrow-derived macrophages. HSO was found to significantly suppress IL-1β production in a dose-dependent manner; this effect correlated well with small amounts of caspase 1 and little ASC pyroptosome formation in HSO-treated cells. The anti-inflammatory activity of HSO was further confirmed in a mouse model of endotoxin-induced septic shock. Oral administration of HSO reduced IL-1β titers in the serum and peritoneal cavity, increasing the survival rate. Taken together, our results suggest that HSO is an inhibits inflammasome activation through nucleotide-binding domain and leucine-rich repeat pyrin domain 3, nucleotide-binding domain and leucine-rich repeat caspase recruitment domain 4 and absent in melanoma 2 pathways, and may be useful for treatment of inflammasome-mediated diseases.
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Affiliation(s)
- Dong-Won Seo
- Gyeongbuk Institute for Bio industry, Andong-si, Gyeongbuk 760-380, South Korea
| | - Yong-Il Cho
- Department of Animal Science and Technology, Suncheon National University, 255 Jungang-ro, Suncheon-si, Jeollanam-do 57922, South Korea
| | - Suna Gu
- Division of Biotechnology, College of Environmental and Bioresources, Chonbuk National University, Iksan-si, Jeollabuk-do 570-752, South Korea
| | - Da-Hee Kim
- Division of Biotechnology, College of Environmental and Bioresources, Chonbuk National University, Iksan-si, Jeollabuk-do 570-752, South Korea
| | - Young-Joo Yi
- Division of Biotechnology, College of Environmental and Bioresources, Chonbuk National University, Iksan-si, Jeollabuk-do 570-752, South Korea
| | - Sang-Myeong Lee
- Division of Biotechnology, College of Environmental and Bioresources, Chonbuk National University, Iksan-si, Jeollabuk-do 570-752, South Korea
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181
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Abstract
Injury and physical trauma may inflict accidental cell death, but we have come to realize during the past four decades that cells may also actively engage cell death when needed. These regulated cell death forms are intrinsically connected with human embryonic development, homeostatic maintenance and disease pathology. For instance, the human body is composed of approximately 10(14) cells, millions of which are removed daily by apoptosis and replaced with newly differentiated cells in order to secure organ functionality. Apoptotic cells are orderly packed in 'apoptotic bodies' for uptake by neighboring cells and professional phagocytes, thereby avoiding deleterious inflammatory responses by circulating leukocytes. Unlike apoptosis, however, more recently identified forms of regulated cell death - such as necroptosis and pyroptosis - are characterized by an early breach of the plasma membrane integrity, which results in extracellular spilling of the intracellular contents. Here, we will describe and discuss this and other features of pyroptosis.
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Affiliation(s)
- Lieselotte Vande Walle
- NOD-like receptor and Inflammasome Laboratory, Inflammation Research Center, VIB, Technologiepark 927, Zwijnaarde, B-9052, Belgium; Department of Internal Medicine, Ghent University, Ghent, B-9000, Belgium
| | - Mohamed Lamkanfi
- NOD-like receptor and Inflammasome Laboratory, Inflammation Research Center, VIB, Technologiepark 927, Zwijnaarde, B-9052, Belgium; Department of Internal Medicine, Ghent University, Ghent, B-9000, Belgium.
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182
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Identification of pharmacological agents that induce HMGB1 release. Sci Rep 2017; 7:14915. [PMID: 29097772 PMCID: PMC5668281 DOI: 10.1038/s41598-017-14848-1] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2017] [Accepted: 10/16/2017] [Indexed: 12/21/2022] Open
Abstract
The translocation of the protein high mobility group box 1 (HMGB1) from the nucleus to the cytoplasm and its secretion or passive release through the permeabilized plasma membrane, constitutes a major cellular danger signal. Extracellular HMGB1 can interact with pattern recognition receptors to stimulate pro-inflammatory and immunostimulatory pathways. Here, we developed a screening assay to identify pharmacological agents endowed with HMGB1 releasing properties. For this, we took advantage of the "retention using selective hooks" (RUSH) system in which a streptavidin-NLS3 fusion protein was used as a nuclear hook to sequestrate streptavidin-binding peptide (SBP) fused with HMGB1 and green fluorescent protein (GFP). When combined with biotin, which competitively disrupts the interaction between streptavidin-NLS3 and HMGB1-SBP-GFP, immunogenic cell death (ICD) inducers such as anthracyclines were able to cause the nucleo-cytoplasmic translocation of HMGB1-SBP-GFP. This system, was used in a high-content screening (HCS) campaign for the identification of HMGB1 releasing agents. Hits fell into three functional categories: known ICD inducers, microtubule inhibitors and epigenetic modifiers. These agents induced ICD through a panoply of distinct mechanisms. Their effective action was confirmed by multiple methods monitoring nuclear, cytoplasmic and extracellular HMGB1 pools, both in cultured human or murine cells, as well as in mouse plasma.
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183
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Masouris I, Klein M, Dyckhoff S, Angele B, Pfister HW, Koedel U. Inhibition of DAMP signaling as an effective adjunctive treatment strategy in pneumococcal meningitis. J Neuroinflammation 2017; 14:214. [PMID: 29096648 PMCID: PMC5669003 DOI: 10.1186/s12974-017-0989-0] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2017] [Accepted: 10/27/2017] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Pneumococcal meningitis remains a potentially lethal and debilitating disease, mainly due to brain damage from sustained inflammation. The release of danger-associated molecular patterns (DAMPs), like myeloid-related protein 14 (MRP14) and high mobility group box 1 protein (HMGB1), plays a major role in persistence of inflammation. In this study, we evaluated if paquinimod, an MRP14-inhibitor, and an anti-HMGB1 antibody can improve clinical outcome as adjunctive therapeutics in pneumococcal meningitis. METHODS We tested the adjuvant administration of paquinimod and the anti-HMGB1 antibody in our pneumococcal meningitis mouse model assessing clinical (clinical score, open-field-test, temperature) and pathophysiological parameters (intracranial pressure, white blood cell count in CSF, bleeding area) as well as bacterial titers in blood and brain 24 h after administration and 48 h after infection. Furthermore, we explored the interactions of these two agents with dexamethasone, the standard adjuvant treatment in pneumococcal meningitis (PM), and daptomycin, a non-bacteriolytic antibiotic preventing pathogen-associated molecular pattern (PAMP) release. RESULTS Adjunctive inhibition of MRP14 or HMGB1 reduced mortality in mice with PM. This effect was lost when the two anti-DAMP agents were given simultaneously, possibly due to excessive immunosuppression. Combining anti-PAMP (daptomycin) and anti-DAMP treatments did not produce synergistic results; instead, the anti-DAMP treatment alone was sufficient and superior. The combination of anti-HMGB1 with dexamethasone did not diminish the effect of the former. CONCLUSIONS DAMP inhibition possesses good potential as an adjuvant treatment approach in PM, as it improves clinical outcome and can be given together with the standard adjuvant dexamethasone without drug effect loss in experimental PM.
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Affiliation(s)
- Ilias Masouris
- Department of Neurology, University Hospital, LMU Munich, 81377, Munich, Germany. .,Department of Neurology, Klinikum Grosshadern of the Ludwig Maximilians University, Marchioninistraße 15, 81377, Munich, Germany.
| | - Matthias Klein
- Department of Neurology, University Hospital, LMU Munich, 81377, Munich, Germany
| | - Susanne Dyckhoff
- Department of Neurology, University Hospital, LMU Munich, 81377, Munich, Germany
| | - Barbara Angele
- Department of Neurology, University Hospital, LMU Munich, 81377, Munich, Germany
| | - H W Pfister
- Department of Neurology, University Hospital, LMU Munich, 81377, Munich, Germany
| | - Uwe Koedel
- Department of Neurology, University Hospital, LMU Munich, 81377, Munich, Germany
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184
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Baldrighi M, Mallat Z, Li X. NLRP3 inflammasome pathways in atherosclerosis. Atherosclerosis 2017; 267:127-138. [PMID: 29126031 DOI: 10.1016/j.atherosclerosis.2017.10.027] [Citation(s) in RCA: 139] [Impact Index Per Article: 19.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/28/2017] [Revised: 10/19/2017] [Accepted: 10/19/2017] [Indexed: 02/08/2023]
Abstract
Atherosclerosis is the major cause of death and disability. Atherosclerotic plaques are characterized by a chronic sterile inflammation in the large blood vessels, where lipid-derived and damage-associated molecular patterns play important roles in inciting immune responses. Following the initial demonstration that NLR family Pyrin domain containing 3 (NLRP3) was important for atherogenesis, a substantial number of studies have emerged addressing the basic mechanisms of inflammasome activation and their relevance to atherosclerosis. In this review, we introduce the basic cellular and molecular mechanisms of NLRP3 inflammasome activation, and discuss the current findings and therapeutic strategies that target NLRP3 inflammasome activation during the development and progression of atherosclerosis.
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Affiliation(s)
- Marta Baldrighi
- Department of Medicine, University of Cambridge, The West Forvie Building, Robinson Way, Cambridge, CB2 0SZ, UK
| | - Ziad Mallat
- Department of Medicine, University of Cambridge, The West Forvie Building, Robinson Way, Cambridge, CB2 0SZ, UK; Institut National de la Santé et de la Recherche Médicale, U970, Paris, France.
| | - Xuan Li
- Department of Medicine, University of Cambridge, The West Forvie Building, Robinson Way, Cambridge, CB2 0SZ, UK.
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185
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Rao Z, Zhang N, Xu N, Pan Y, Xiao M, Wu J, Zhou H, Yang S, Chen Y. 1,25-Dihydroxyvitamin D Inhibits LPS-Induced High-Mobility Group Box 1 (HMGB1) Secretion via Targeting the NF-E2-Related Factor 2-Hemeoxygenase-1-HMGB1 Pathway in Macrophages. Front Immunol 2017; 8:1308. [PMID: 29085368 PMCID: PMC5650703 DOI: 10.3389/fimmu.2017.01308] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2017] [Accepted: 09/27/2017] [Indexed: 12/30/2022] Open
Abstract
1,25-Dihydroxyvitamin D [1,25(OH)2D3] is recognized as a key mediator of inflammatory diseases, including sepsis. Clinical studies demonstrate that 1,25 (OH)2D3 protects patients from sepsis, but clinical treatment with 1,25(OH)2D3 is rare. In this study, we report that 1,25(OH)2D3 treatment has beneficial effects and improves the survival rate in LPS-induced mouse sepsis model by blocking the secretion of high-mobility group box 1 (HMGB1), a key late regulator of sepsis. LPS-induced HMGB1 secretion is attenuated by 1,25(OH)2D3via blocking HMGB1 translocation from the nucleus to the cytoplasm in macrophages. 1,25(OH)2D3 can induce the expression of hemeoxygenase-1 (HO-1), which is essential for blocking HMBG1 nuclear translocation and its secretion. When siHO-1 or an HO-1 inhibitor are used, the effect of 1,25(OH)2D3 on inhibition of HMGB1 secretion is suppressed. Considering that HO-1 is a downstream gene of NF-E2-related factor 2 (Nrf2), we further confirm that Nrf2 activation can be activated by 1,25(OH)2D3 upon LPS exposure. Together, we provide evidence that 1,25(OH)2D3 attenuates LPS-induced HMGB1 secretion via the Nrf2/HO-1 pathway in macrophages.
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Affiliation(s)
- Zebing Rao
- Department of Immunology, Nanjing Medical University, Nanjing, China.,Key Laboratory of Antibody Techniques of Ministry of Health, Nanjing Medical University, Nanjing, China
| | - Na Zhang
- Department of Immunology, Nanjing Medical University, Nanjing, China.,Key Laboratory of Antibody Techniques of Ministry of Health, Nanjing Medical University, Nanjing, China
| | - Ning Xu
- Department of Pathology, Nanjing Medical University, Nanjing, China
| | - Ying Pan
- Department of Immunology, Nanjing Medical University, Nanjing, China.,Key Laboratory of Antibody Techniques of Ministry of Health, Nanjing Medical University, Nanjing, China
| | - Mengjun Xiao
- Department of Immunology, Nanjing Medical University, Nanjing, China.,Key Laboratory of Antibody Techniques of Ministry of Health, Nanjing Medical University, Nanjing, China
| | - Junxian Wu
- Department of Immunology, Nanjing Medical University, Nanjing, China.,Key Laboratory of Antibody Techniques of Ministry of Health, Nanjing Medical University, Nanjing, China
| | - Hong Zhou
- Department of Immunology, Nanjing Medical University, Nanjing, China
| | - Shuo Yang
- Department of Immunology, Nanjing Medical University, Nanjing, China.,Key Laboratory of Antibody Techniques of Ministry of Health, Nanjing Medical University, Nanjing, China
| | - Yunzi Chen
- Department of Immunology, Nanjing Medical University, Nanjing, China.,Key Laboratory of Antibody Techniques of Ministry of Health, Nanjing Medical University, Nanjing, China.,Medical Centre for Digestive Diseases, Second Affiliated Hospital of Nanjing Medical University, Nanjing, China
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186
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How Inflammasomes Inform Adaptive Immunity. J Mol Biol 2017; 430:217-237. [PMID: 28987733 DOI: 10.1016/j.jmb.2017.09.019] [Citation(s) in RCA: 101] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2017] [Revised: 09/27/2017] [Accepted: 09/28/2017] [Indexed: 02/07/2023]
Abstract
An immune response consists of a finely orchestrated interplay between initial recognition of potential microbial threats by the innate immune system and subsequent licensed adaptive immune neutralization. The initial recognition integrates environmental cues derived from pathogen-associated molecular patterns and cell-intrinsic damage-associated molecular patterns to contextualize the insult and inform a tailored adaptive response via T and B lymphocytes. While there are much data to support the role of transcriptional responses downstream of pattern recognition receptors in informing the adaptive immune response, markedly less attention has been paid to the role of post-translational responses to pathogen-associated molecular pattern and damage-associated molecular pattern recognition by the innate immune system, and how this may influence adaptive immunity. A well-characterized post-translational consequence of pattern recognition receptor signaling is the assembly of a multimeric signaling platform, termed the inflammasome, by members of the nucleotide-binding oligomerization domain (Nod), leucine-rich repeat-containing receptors (NLRs), and pyrin and HIN domain (PYHIN) families. Inflammasomes assemble in response to cytosolic perturbations, such as mitochondrial dysfunction and aberrant ion fluxes in the case of the canonical NLRP3 inflammasome or the presence of bacterial lipopolysaccharides in the case of the non-canonical inflammasome. Assembly of the inflammasome allows for the cleavage and activation of inflammatory caspases. These activated inflammatory caspases in turn cleave pro-form inflammatory cytokines into their mature bioactive species and lead to unconventional protein secretion and lytic cell death. In this review, we discuss evidence for inflammasome-mediated instruction and contextualization of infectious and sterile agents to the adaptive immune system.
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187
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Lei-Leston AC, Murphy AG, Maloy KJ. Epithelial Cell Inflammasomes in Intestinal Immunity and Inflammation. Front Immunol 2017; 8:1168. [PMID: 28979266 PMCID: PMC5611393 DOI: 10.3389/fimmu.2017.01168] [Citation(s) in RCA: 85] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2017] [Accepted: 09/04/2017] [Indexed: 12/12/2022] Open
Abstract
Pattern recognition receptors (PRR), such as NOD-like receptors (NLRs), sense conserved microbial signatures, and host danger signals leading to the coordination of appropriate immune responses. Upon activation, a subset of NLR initiate the assembly of a multimeric protein complex known as the inflammasome, which processes pro-inflammatory cytokines and mediates a specialized form of cell death known as pyroptosis. The identification of inflammasome-associated genes as inflammatory bowel disease susceptibility genes implicates a role for the inflammasome in intestinal inflammation. Despite the fact that the functional importance of inflammasomes within immune cells has been well established, the contribution of inflammasome expression in non-hematopoietic cells remains comparatively understudied. Given that intestinal epithelial cells (IEC) act as a barrier between the host and the intestinal microbiota, inflammasome expression by these cells is likely important for intestinal immune homeostasis. Accumulating evidence suggests that the inflammasome plays a key role in shaping epithelial responses at the host-lumen interface with many inflammasome components highly expressed by IEC. Recent studies have exposed functional roles of IEC inflammasomes in mucosal immune defense, inflammation, and tumorigenesis. In this review, we present the main features of the predominant inflammasomes and their effector mechanisms contributing to intestinal homeostasis and inflammation. We also discuss existing controversies in the field and open questions related to their implications in disease. A comprehensive understanding of the molecular basis of intestinal inflammasome signaling could hold therapeutic potential for clinical translation.
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Affiliation(s)
- Andrea C Lei-Leston
- Sir William Dunn School of Pathology, University of Oxford, Oxford, United Kingdom
| | - Alison G Murphy
- Sir William Dunn School of Pathology, University of Oxford, Oxford, United Kingdom
| | - Kevin J Maloy
- Sir William Dunn School of Pathology, University of Oxford, Oxford, United Kingdom
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188
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Auvin S, Walker L, Gallentine W, Jozwiak S, Tombini M, Sills GJ. Prospective clinical trials to investigate clinical and molecular biomarkers. Epilepsia 2017; 58 Suppl 3:20-26. [PMID: 28675556 DOI: 10.1111/epi.13782] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/08/2017] [Indexed: 01/11/2023]
Abstract
Among clinical studies, randomized studies as well as well-designed observational studies are providing the highest quality data. In addition, these studies represent a good opportunity to examine biomarkers of ictogenesis and epileptogenesis. To date, no validated molecular or cellular biomarker exists for any aspect of epilepsy. We provide an overview of the inflammatory biomarkers under investigation in prospective clinical studies in epilepsy: proinflammatory cytokines in prolonged febrile seizure; High Mobility Group Box 1 (HMGB1) as a prognosis biomarker in epilepsy and the interaction between inflammation and metabolism, in particular, iron metabolism, in epilepsy. The designs of the European Union EPISTOP project following prospectively patients with tuberous sclerosis from birth to the start of the epilepsy and of the Standard and New Antiepileptic Drugs-II study illustrate how such studies can be used to find new inflammatory biomarkers of ictogenesis and epileptogenesis. If we want to bridge the current gap between having numerous biomarker candidates from preclinical studies and their selective use in clinical practice, we need to explore multiple biologic systems, not just including inflammation. In addition, it is crucial that those involved in the design and support of relevant clinical studies recognize this gap and act accordingly, and in the interests of improving the diagnosis and prognosis for epilepsy.
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Affiliation(s)
- Stéphane Auvin
- Pediatric Neurology Department & INSERM U1141, Robert-Debré University Hospital, APHP, Paris, France
| | - Lauren Walker
- Department of Molecular & Clinical Pharmacology, Institute of Translational Medicine, University of Liverpool, Liverpool, United Kingdom
| | - William Gallentine
- Department of Pediatrics (Neurology), Duke University Medical Center, Durham, North Carolina, U.S.A
| | - Sergiusz Jozwiak
- Department of Child Neurology, Medical University of Warsaw, Warsaw, Poland
| | - Mario Tombini
- Department of Medicine, Unit of Neurology, Neurophysiology, Neurobiology, Campus Bio-Medico University, Rome, Italy
| | - Graeme J Sills
- Department of Molecular & Clinical Pharmacology, Institute of Translational Medicine, University of Liverpool, Liverpool, United Kingdom
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189
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Cheng Y, Wei Y, Yang W, Song Y, Shang H, Cai Y, Wu Z, Zhao W. Cordycepin confers neuroprotection in mice models of intracerebral hemorrhage via suppressing NLRP3 inflammasome activation. Metab Brain Dis 2017; 32:1133-1145. [PMID: 28401330 DOI: 10.1007/s11011-017-0003-7] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/26/2016] [Accepted: 03/27/2017] [Indexed: 12/31/2022]
Abstract
Neuroinflammation has been recognized as a major contributor to brain injury caused by intracerebral hemorrhage (ICH). Nucleotide-binding oligomerization domain-like receptor family pyrin domain-containing 3 (NLRP3) inflammasome acts as an important mediator of inflammatory response in various inflammation-related diseases including hemorrhagic insults. Cordycepin has recently been shown to possess anti-inflammatory effect; however, its role and the possible underlying mechanisms in ICH remain unclear. This study was designed to investigate the neuroprotective effect of cordycepin in mice models of ICH and to elucidate the underlying molecular mechanisms. ICH was induced in male ICR mice by injecting autologous blood infusion stereotactically. Cordycepin was then given intraperitoneally (i.p.) at 30 min after ICH induction. The results demonstrated that NLRP3 inflammasome was activated and exacerbated the inflammatory progression after ICH. Cordycepin treatment significantly alleviated neurological deficits, brain edema, and perihematomal tissue damage following ICH. These changes were accompanied by downregulated NLRP3 inflammasome components expression and a reduction of production and release of inflammasome substrates interleukin-1beta (IL-1β) and interleukin-18 (IL-18). Furthermore, cordycepin ameliorated neuronal death in the perihematomal regions, accompanied by a large reduction in the expression of high-mobility group protein B 1 (HMGB1) post-ICH. In conclusion, this study provides in vivo evidence that cordycepin confers neuroprotective effect in the models of ICH, possibly through the suppression of NLRP3 inflammasome activation.
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Affiliation(s)
- Yijun Cheng
- Department of Neurosurgery, Rui Jin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, People's Republic of China
| | - Yongxu Wei
- Department of Neurosurgery, Rui Jin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, People's Republic of China
| | - Wenlei Yang
- Department of Neurosurgery, Rui Jin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, People's Republic of China
| | - Yaying Song
- Department of Neurology, Rui Jin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, People's Republic of China
| | - Hanbing Shang
- Department of Neurosurgery, Rui Jin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, People's Republic of China
| | - Yu Cai
- Department of Neurosurgery, North Rui Jin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 201800, People's Republic of China.
| | - Zhebao Wu
- Department of Neurosurgery, Rui Jin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, People's Republic of China.
| | - Weiguo Zhao
- Department of Neurosurgery, Rui Jin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, People's Republic of China.
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190
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Zheng S, Weng Q, Wu W, Ding G. Blood purification treatment initiated at the time of sepsis diagnosis effectively attenuates serum HMGB1 upregulation and improves patient prognosis. Exp Ther Med 2017; 14:3029-3035. [PMID: 28912856 PMCID: PMC5585716 DOI: 10.3892/etm.2017.4854] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2016] [Accepted: 05/05/2017] [Indexed: 01/21/2023] Open
Abstract
The aim of the present study was to investigate the increase in serum and urine levels of high mobility group box protein 1 (HMGB1) during sepsis and the effect of blood purification treatments on HMGB1 levels and patient prognosis. A total of 40 intensive care patients with sepsis were randomly assigned to different groups (n=10 per group): A control group (sepsis group), a continuous renal replacement treatment (CRRT) group, a hemoperfusion (HP) group and an HP+CRRT group. The blood purification treatments using HP and/or CRRT were performed immediately after the diagnosis of sepsis. HMGB1 levels were measured using ELISA, and Acute Physiology and Chronic Health Evaluation (APACHE) II scores and 30-day survival rates were evaluated. Relative to a healthy control group (n=10), HMGB1 levels were observed to be significantly upregulated during sepsis (P<0.05). Following the initiation of sepsis, serum HMGB1 continued to increase in the sepsis group and was significantly elevated at 24 h (P<0.05), whereas urine HMGB1 levels decreased significantly at 12 and 24 h (P<0.05). Serum HMGB1 levels were significantly positively correlated with APACHE II scores (r=0.7284, P<0.01) and significantly negatively correlated with urine HMGB1 levels (r=−0.5103, P=0.026). Serum HMGB1 levels were significantly reduced in the HP and HP+CRRT groups by 12 and 24 h following the initiation of treatment (both P<0.05). Changes in the urine HMGB1 level differed in each group. Relative to the sepsis group, the APACHE II scores of all blood purification groups were significantly reduced (P<0.05) and the 30-day survival rate of the HP+CRRT group was significantly increased (P=0.0107). The results of the present study indicate that blood purification initiated at the point of diagnosis in patients with sepsis may attenuate serum HMGB1 upregulation, promote urinary excretion of HMGB1 and improve the prognosis of sepsis.
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Affiliation(s)
- Shixiang Zheng
- Division of Critical Care Medicine, Union Hospital of Fujian Medical University, Fuzhou, Fujian 350001, P.R. China
| | - Qinyong Weng
- Division of Critical Care Medicine, Union Hospital of Fujian Medical University, Fuzhou, Fujian 350001, P.R. China
| | - Wenwei Wu
- Division of Critical Care Medicine, Union Hospital of Fujian Medical University, Fuzhou, Fujian 350001, P.R. China
| | - Guohua Ding
- Division of Nephrology, Renmin Hospital of Wuhan University, Wuhan, Hubei 430000, P.R. China
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191
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Kolb JP, Oguin TH, Oberst A, Martinez J. Programmed Cell Death and Inflammation: Winter Is Coming. Trends Immunol 2017; 38:705-718. [PMID: 28734635 DOI: 10.1016/j.it.2017.06.009] [Citation(s) in RCA: 79] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2017] [Revised: 06/21/2017] [Accepted: 06/26/2017] [Indexed: 01/19/2023]
Abstract
The life of an organism requires the assistance of an unlikely process: programmed cell death. Both development and the maintenance of homeostasis result in the production of superfluous cells that must eventually be disposed of. Furthermore, programmed cell death can also represent a defense mechanism; for example, by depriving pathogens of a replication niche. The responsibility of handling these dead cells falls on phagocytes of the immune system, which surveil their surroundings for dying or dead cells and efficiently clear them in a quiescent manner. This process, termed efferocytosis, depends on cooperation between the phagocyte and the dying cell. In this review we explore different types of programmed cell death and their impact on innate immune responses.
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Affiliation(s)
- Joseph P Kolb
- Immunity, Inflammation, and Disease Laboratory, NIEHS, National Institutes of Health, Research Triangle Park, Durham, NC 27709, USA
| | - Thomas H Oguin
- Immunity, Inflammation, and Disease Laboratory, NIEHS, National Institutes of Health, Research Triangle Park, Durham, NC 27709, USA
| | - Andrew Oberst
- Department of Immunology, University of Washington, Seattle, WA 98109, USA
| | - Jennifer Martinez
- Immunity, Inflammation, and Disease Laboratory, NIEHS, National Institutes of Health, Research Triangle Park, Durham, NC 27709, USA.
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192
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Pfalzgraff A, Heinbockel L, Su Q, Brandenburg K, Weindl G. Synthetic anti-endotoxin peptides inhibit cytoplasmic LPS-mediated responses. Biochem Pharmacol 2017; 140:64-72. [PMID: 28539262 DOI: 10.1016/j.bcp.2017.05.015] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2017] [Accepted: 05/19/2017] [Indexed: 10/19/2022]
Abstract
Toll-like receptor (TLR) 4-independent recognition of lipopolysaccharide (LPS) in the cytosol by inflammatory caspases leads to non-canonical inflammasome activation and induction of IL-1 secretion and pyroptosis. The discovery of this novel mechanism has potential implications for the development of effective drugs to treat sepsis since LPS-mediated hyperactivation of caspases is critically involved in endotoxic shock. Previously, we demonstrated that Pep19-2.5, a synthetic anti-endotoxin peptide, efficiently neutralises pathogenicity factors of Gram-negative and Gram-positive bacteria and protects against sepsis in vivo. Here, we report that Pep19-2.5 inhibits the effects of cytoplasmic LPS in human myeloid cells and keratinocytes. In THP-1 monocytes and macrophages, the peptide strongly reduced secretion of IL-1β and LDH induced by intracellular LPS. In contrast, the TLR4 signaling inhibitor TAK-242 abrogates LPS-induced TNF and IL-1β secretion, but not pyroptotic cell death. Furthermore, Pep19-2.5 suppressed LPS-induced HMGB-1 production and caspase-1 activation in THP-1 monocytes. Consistent with this observation, we found impaired IL-1β and IL-1α release in LPS-stimulated primary monocytes in the presence of Pep19-2.5 and reduced LDH release and IL-1B and IL-1A expression in LPS-transfected HaCaT keratinocytes. Additionally, Pep19-2.5 completely abolished IL-1β release induced by LPS/ATP in macrophages via canonical inflammasome activation. In conclusion, we provide evidence that anti-endotoxin peptides inhibit the inflammasome/IL-1 axis induced by cytoplasmic LPS sensing in myeloid cells and keratinocytes and activation of the classical inflammasome by LPS/ATP which may contribute to the protection against bacterial sepsis and skin infections with intracellular Gram-negative bacteria.
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Affiliation(s)
- Anja Pfalzgraff
- Freie Universität Berlin, Institute of Pharmacy (Pharmacology and Toxicology), Berlin, Germany
| | - Lena Heinbockel
- Research Center Borstel, Leibniz-Center for Medicine and Biosciences, Divisions of Biophysics, Borstel, Germany
| | - Qi Su
- Freie Universität Berlin, Institute of Pharmacy (Pharmacology and Toxicology), Berlin, Germany
| | - Klaus Brandenburg
- Research Center Borstel, Leibniz-Center for Medicine and Biosciences, Divisions of Biophysics, Borstel, Germany
| | - Günther Weindl
- Freie Universität Berlin, Institute of Pharmacy (Pharmacology and Toxicology), Berlin, Germany.
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193
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Walker LE, Frigerio F, Ravizza T, Ricci E, Tse K, Jenkins RE, Sills GJ, Jorgensen A, Porcu L, Thippeswamy T, Alapirtti T, Peltola J, Brodie MJ, Park BK, Marson AG, Antoine DJ, Vezzani A, Pirmohamed M. Molecular isoforms of high-mobility group box 1 are mechanistic biomarkers for epilepsy. J Clin Invest 2017; 127:2118-2132. [PMID: 28504645 PMCID: PMC5451237 DOI: 10.1172/jci92001] [Citation(s) in RCA: 70] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2016] [Accepted: 03/16/2017] [Indexed: 01/09/2023] Open
Abstract
Approximately 30% of epilepsy patients do not respond to antiepileptic drugs, representing an unmet medical need. There is evidence that neuroinflammation plays a pathogenic role in drug-resistant epilepsy. The high-mobility group box 1 (HMGB1)/TLR4 axis is a key initiator of neuroinflammation following epileptogenic injuries, and its activation contributes to seizure generation in animal models. However, further work is required to understand the role of HMGB1 and its isoforms in epileptogenesis and drug resistance. Using a combination of animal models and sera from clinically well-characterized patients, we have demonstrated that there are dynamic changes in HMGB1 isoforms in the brain and blood of animals undergoing epileptogenesis. The pathologic disulfide HMGB1 isoform progressively increased in blood before epilepsy onset and prospectively identified animals that developed the disease. Consistent with animal data, we observed early expression of disulfide HMGB1 in patients with newly diagnosed epilepsy, and its persistence was associated with subsequent seizures. In contrast with patients with well-controlled epilepsy, patients with chronic, drug-refractory epilepsy persistently expressed the acetylated, disulfide HMGB1 isoforms. Moreover, treatment of animals with antiinflammatory drugs during epileptogenesis prevented both disease progression and blood increase in HMGB1 isoforms. Our data suggest that HMGB1 isoforms are mechanistic biomarkers for epileptogenesis and drug-resistant epilepsy in humans, necessitating evaluation in larger-scale prospective studies.
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Affiliation(s)
- Lauren Elizabeth Walker
- Department of Molecular and Clinical Pharmacology, University of Liverpool, Liverpool, United Kingdom
| | | | | | - Emanuele Ricci
- Department of Molecular and Clinical Pharmacology, University of Liverpool, Liverpool, United Kingdom
| | - Karen Tse
- Department of Molecular and Clinical Pharmacology, University of Liverpool, Liverpool, United Kingdom
| | - Rosalind E Jenkins
- Department of Molecular and Clinical Pharmacology, University of Liverpool, Liverpool, United Kingdom
| | - Graeme John Sills
- Department of Molecular and Clinical Pharmacology, University of Liverpool, Liverpool, United Kingdom
| | - Andrea Jorgensen
- Department of Molecular and Clinical Pharmacology, University of Liverpool, Liverpool, United Kingdom
| | - Luca Porcu
- Department of Oncology, IRCCS-Istituto di Ricerche Farmacologiche Mario Negri, Milano, Italy
| | - Thimmasettappa Thippeswamy
- Department of Biomedical Sciences, College of Veterinary Medicine, Iowa State University, Ames, Iowa, USA
| | - Tiina Alapirtti
- Department of Neurology and Rehabilitation, Tampere University Hospital, Tampere, Finland
| | - Jukka Peltola
- Department of Neurology and Rehabilitation, Tampere University Hospital, Tampere, Finland
| | | | - Brian Kevin Park
- Department of Molecular and Clinical Pharmacology, University of Liverpool, Liverpool, United Kingdom
| | - Anthony Guy Marson
- Department of Molecular and Clinical Pharmacology, University of Liverpool, Liverpool, United Kingdom
| | - Daniel James Antoine
- Department of Molecular and Clinical Pharmacology, University of Liverpool, Liverpool, United Kingdom
| | | | - Munir Pirmohamed
- Department of Molecular and Clinical Pharmacology, University of Liverpool, Liverpool, United Kingdom
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194
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Wang H, Li M, Liu J, Xu J, Han Q, Liu Q. Toxoplasma gondii Infection Induces High Mobility Group Box 1 Released from Mouse Macrophages. Front Microbiol 2017; 8:658. [PMID: 28484433 PMCID: PMC5402041 DOI: 10.3389/fmicb.2017.00658] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2016] [Accepted: 03/30/2017] [Indexed: 11/23/2022] Open
Abstract
High mobility group box 1 (HMGB1) is abundantly expressed in intracellular engaged DNA binding ability. However, more importantly, it is a weapon against infection through proinflammatory response and immune regulation while released to extracellular. Toxoplasma gondii causes inflammatory pathological changes including ileitis and encephalitis in chronic infection. To investigate whether HMGB1 contributes to the toxoplasmosis lesions, we examined HMGB1 changes during T. gondii infection. The results showed that HMGB1 transcription was down-regulated in the murine macrophage ANA1 cell line and mouse peritoneal macrophages (PMΦs) after T. gondii inoculation, but up-regulated in the IFN-γ treated macrophages and the intraperitoneal exudate cells from the T. gondii infected mice. The content of intracellular HMGB1 are basically consistent with the transcription levels in ANA1 assay, while there were no obvious changes in the mouse PMΦs. Both ANA1 and mouse PMΦs released HMGB1 after parasites infection, and no obvious HMGB1 aggregation in cytoplasm compare to the IFN-γ treatment group. Furthermore, we demonstrated that T. gondii invasion led to HMGB1 release, which was dependent on the Caspase 1 activity. These finding should promote to further investigate the functions of extracellular HMGB1 in the toxoplasmosis.
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Affiliation(s)
- Hui Wang
- National Animal Protozoa Laboratory, College of Veterinary Medicine, China Agricultural UniversityBeijing, China.,Department of Pathogenic Biology, Chengdu Medical CollegeChengdu, China
| | - Muzi Li
- National Animal Protozoa Laboratory, College of Veterinary Medicine, China Agricultural UniversityBeijing, China
| | - Jing Liu
- National Animal Protozoa Laboratory, College of Veterinary Medicine, China Agricultural UniversityBeijing, China
| | - Jianhai Xu
- National Animal Protozoa Laboratory, College of Veterinary Medicine, China Agricultural UniversityBeijing, China
| | - Qian Han
- Laboratory of Tropical Veterinary Medicine and Vector Biology, Hainan Key Laboratory of Sustainable Utilization of Tropical Bioresources, Hainan UniversityHaikou, China
| | - Qun Liu
- National Animal Protozoa Laboratory, College of Veterinary Medicine, China Agricultural UniversityBeijing, China
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195
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Shi G, Abbott KN, Wu W, Salter RD, Keyel PA. Dnase1L3 Regulates Inflammasome-Dependent Cytokine Secretion. Front Immunol 2017; 8:522. [PMID: 28533778 PMCID: PMC5420570 DOI: 10.3389/fimmu.2017.00522] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2017] [Accepted: 04/19/2017] [Indexed: 12/22/2022] Open
Abstract
Pediatric-onset systemic lupus erythematosus arises in humans and mice lacking the endonuclease Dnase1L3. When Dnase1L3 is absent, DNA from circulating apoptotic bodies is not cleared, leading to anti-DNA antibody production. Compared to early anti-DNA and anti-chromatin responses, other autoantibody responses and general immune activation in Dnase1L3−/− mice are greatly delayed. We investigated the possibility that immune activation, specifically inflammasome activation, is regulated by Dnase1L3. Here, we report that Dnase1L3 inhibition blocked both NLR family, pyrin domain containing 3 (NLRP3) and NLRC4 inflammasome-mediated release of high-mobility group box 1 protein and IL-1β. In contrast to IL-1β release, Dnase1L3 inhibition only mildly impaired NLRP3-dependent pyroptosis, as measured by propidium iodide uptake or LDH release. Mechanistically, we found that Dnase1L3 was needed to promote apoptosis-associated speck-like protein containing a caspase activation and recruitment domain (ASC) nuclear export and speck formation. Our results demonstrate that Dnase1L3 inhibition separates cytokine secretion from pyroptosis by targeting ASC. These findings suggest that Dnase1L3 is necessary for cytokine secretion following inflammasome activation.
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Affiliation(s)
- Guilan Shi
- Department of Biological Sciences, Texas Tech University, Lubbock, TX, USA
| | - Kennady N Abbott
- Department of Biological Sciences, Texas Tech University, Lubbock, TX, USA
| | - Wenbo Wu
- School of Life Sciences, Lanzhou University, Lanzhou, Gansu, China
| | - Russell D Salter
- Department of Immunology, University of Pittsburgh, Pittsburgh, PA, USA
| | - Peter A Keyel
- Department of Biological Sciences, Texas Tech University, Lubbock, TX, USA.,Department of Immunology, University of Pittsburgh, Pittsburgh, PA, USA
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196
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Man SM, Karki R, Kanneganti TD. Molecular mechanisms and functions of pyroptosis, inflammatory caspases and inflammasomes in infectious diseases. Immunol Rev 2017; 277:61-75. [PMID: 28462526 PMCID: PMC5416822 DOI: 10.1111/imr.12534] [Citation(s) in RCA: 1053] [Impact Index Per Article: 150.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Cell death is a fundamental biological phenomenon that is essential for the survival and development of an organism. Emerging evidence also indicates that cell death contributes to immune defense against infectious diseases. Pyroptosis is a form of inflammatory programmed cell death pathway activated by human and mouse caspase-1, human caspase-4 and caspase-5, or mouse caspase-11. These inflammatory caspases are used by the host to control bacterial, viral, fungal, or protozoan pathogens. Pyroptosis requires cleavage and activation of the pore-forming effector protein gasdermin D by inflammatory caspases. Physical rupture of the cell causes release of the pro-inflammatory cytokines IL-1β and IL-18, alarmins and endogenous danger-associated molecular patterns, signifying the inflammatory potential of pyroptosis. Here, we describe the central role of inflammatory caspases and pyroptosis in mediating immunity to infection and clearance of pathogens.
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Affiliation(s)
- Si Ming Man
- Department of Immunology, St. Jude Children's Research Hospital, Memphis, TN, USA
| | - Rajendra Karki
- Department of Immunology, St. Jude Children's Research Hospital, Memphis, TN, USA
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197
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Vezzani A, Pascente R, Ravizza T. Biomarkers of Epileptogenesis: The Focus on Glia and Cognitive Dysfunctions. Neurochem Res 2017; 42:2089-2098. [PMID: 28434163 DOI: 10.1007/s11064-017-2271-3] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2017] [Revised: 04/12/2017] [Accepted: 04/17/2017] [Indexed: 12/31/2022]
Abstract
The need to find measures that reliably predict the onset of epilepsy after injurious events or how the patient will respond to anti-seizure drugs led to intensive pre-clinical and clinical research to discover non-invasive biomarkers that could increase the sensitivity of existing clinical indicators. The use of experimental models of epileptogenesis and of drug-resistance is instrumental to select the most promising approaches to explore such biomarkers in the pre-clinical setting for further clinical validation. The approaches most frequently used to find clinically useful biomarkers of epileptogenesis include molecular brain imaging, EEG signal analysis and the measure of soluble molecules in biofluids which may reflect brain intrinsic events involved in epilepsy development. Among those, we focused our attention on proton magnetic resonance imaging (1H-MRS)-based analysis of astrocytic activation, and related blood biomarkers, since this cell population appears to be pivotally involved in various epileptogenesis processes triggered by differing insults. Moreover, we also investigated behavioral biomarkers by focusing on cognitive dysfunctions since this deficit represents a typical co-morbidity in epilepsy which may manifest even before the onset of spontaneous seizures. In this review article, we will report our recently published evidence supporting the utility of measuring astrocyte activation, the soluble molecules they release, and the associated cognitive deficits during epileptogenesis for early stratification of animals developing epilepsy. We will discuss the potential clinical translation of our findings for enriching the patient population in preventive clinical trials designed to study anti-epileptogenic treatments.
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Affiliation(s)
- Annamaria Vezzani
- Department of Neuroscience, IRCCS-Istituto Di Ricerche Farmacologiche Mario Negri, Via G. La Masa, 19, 20156, Milan, Italy.
| | - Rosaria Pascente
- Department of Neuroscience, IRCCS-Istituto Di Ricerche Farmacologiche Mario Negri, Via G. La Masa, 19, 20156, Milan, Italy
| | - Teresa Ravizza
- Department of Neuroscience, IRCCS-Istituto Di Ricerche Farmacologiche Mario Negri, Via G. La Masa, 19, 20156, Milan, Italy
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198
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Differential roles of caspase-1 and caspase-11 in infection and inflammation. Sci Rep 2017; 7:45126. [PMID: 28345580 PMCID: PMC5366862 DOI: 10.1038/srep45126] [Citation(s) in RCA: 90] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2016] [Accepted: 02/16/2017] [Indexed: 02/07/2023] Open
Abstract
Caspase-1, also known as interleukin-1β (IL-1β)-converting enzyme (ICE), regulates antimicrobial host defense, tissue repair, tumorigenesis, metabolism and membrane biogenesis. On activation within an inflammasome complex, caspase-1 induces pyroptosis and converts pro-IL-1β and pro-IL-18 into their biologically active forms. “ICE−/−” or “Casp1−/−” mice generated using 129 embryonic stem cells carry a 129-associated inactivating passenger mutation on the caspase-11 locus, essentially making them deficient in both caspase-1 and caspase-11. The overlapping and unique functions of caspase-1 and caspase-11 are difficult to unravel without additional genetic tools. Here, we generated caspase-1–deficient mouse (Casp1Null) on the C57BL/6 J background that expressed caspase-11. Casp1Null cells did not release IL-1β and IL-18 in response to NLRC4 activators Salmonella Typhimurium and flagellin, canonical or non-canonical NLRP3 activators LPS and ATP, Escherichia coli, Citrobacter rodentium and transfection of LPS, AIM2 activators Francisella novicida, mouse cytomegalovirus and DNA, and the infectious agents Listeria monocytogenes and Aspergillus fumigatus. We further demonstrated that caspase-1 and caspase-11 differentially contributed to the host defense against A. fumigatus infection and to endotoxemia.
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199
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Algaba-Chueca F, de-Madaria E, Lozano-Ruiz B, Martínez-Cardona C, Quesada-Vázquez N, Bachiller V, Tarín F, Such J, Francés R, Zapater P, González-Navajas JM. The expression and activation of the AIM2 inflammasome correlates with inflammation and disease severity in patients with acute pancreatitis. Pancreatology 2017; 17:364-371. [PMID: 28342645 DOI: 10.1016/j.pan.2017.03.006] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/22/2016] [Revised: 03/14/2017] [Accepted: 03/16/2017] [Indexed: 12/11/2022]
Abstract
BACKGROUND Acute pancreatitis is an inflammatory disorder of the pancreas that is responsible for significant morbidity and mortality. The inflammasome pathway has acquired significant relevance in the pathogenesis of many inflammatory disorders, but its role in patients with acute pancreatitis still awaits clarification. METHODS We performed a prospective study in which 27 patients with acute pancreatitis and 16 healthy controls were included. We isolated peripheral blood mononuclear cells (PBMCs) and we assessed the expression and activation of different inflammasomes as well as their association with the clinical course of the disease. RESULTS Our results show that PBMCs from patients with acute pancreatitis have elevated expression of several components of the inflammasome complex, including the inflammasome-forming receptor absent in melanoma 2 (AIM2), early during the onset of the disease. Activation of the AIM2 or NLRP3 inflammasomes in PBMCs from patients with acute pancreatitis results in exacerbated IL-1β and IL-18 production compared with PBMCs from healthy controls. Furthermore, both AIM2 mRNA expression and AIM2-mediated production of IL-1β by PBMCs correlated with increased systemic inflammation in these patients. Last, AIM2 expression was further increased in those patients that developed transient or persistent organ failure (moderate or severe acute pancreatitis). CONCLUSIONS Our data demonstrates that AIM2 inflammasome expression and activation is increased early during the course of acute pancreatitis, and suggests that AIM2 activation may affect systemic inflammation and organ failure in these patients.
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Affiliation(s)
- Francisco Algaba-Chueca
- Networked Biomedical Research Center for Hepatic and Digestive Diseases (CIBERehd), Institute of Health Carlos III, Madrid, Spain
| | - Enrique de-Madaria
- Alicante Institute of Health and Biomedical Research (ISABIAL - FISABIO Foundation), Alicante, Spain; Department of Gastroenterology, General Hospital of Alicante, Alicante, Spain
| | - Beatriz Lozano-Ruiz
- Networked Biomedical Research Center for Hepatic and Digestive Diseases (CIBERehd), Institute of Health Carlos III, Madrid, Spain; Alicante Institute of Health and Biomedical Research (ISABIAL - FISABIO Foundation), Alicante, Spain
| | - Claudia Martínez-Cardona
- Networked Biomedical Research Center for Hepatic and Digestive Diseases (CIBERehd), Institute of Health Carlos III, Madrid, Spain; Department of Pharmacology, University Miguel Hernández, Alicante, Spain
| | - Noé Quesada-Vázquez
- Alicante Institute of Health and Biomedical Research (ISABIAL - FISABIO Foundation), Alicante, Spain; Department of Gastroenterology, General Hospital of Alicante, Alicante, Spain
| | - Victoria Bachiller
- Networked Biomedical Research Center for Hepatic and Digestive Diseases (CIBERehd), Institute of Health Carlos III, Madrid, Spain
| | - Fabián Tarín
- Hematology Service, General Hospital of Alicante, Alicante, Spain
| | - José Such
- Networked Biomedical Research Center for Hepatic and Digestive Diseases (CIBERehd), Institute of Health Carlos III, Madrid, Spain; Cleveland Clinic Abu Dhabi, Abu Dhabi, United Arab Emirates
| | - Rubén Francés
- Networked Biomedical Research Center for Hepatic and Digestive Diseases (CIBERehd), Institute of Health Carlos III, Madrid, Spain; Alicante Institute of Health and Biomedical Research (ISABIAL - FISABIO Foundation), Alicante, Spain; Department of Clinical Medicine, University Miguel Hernández, Alicante, Spain
| | - Pedro Zapater
- Networked Biomedical Research Center for Hepatic and Digestive Diseases (CIBERehd), Institute of Health Carlos III, Madrid, Spain; Alicante Institute of Health and Biomedical Research (ISABIAL - FISABIO Foundation), Alicante, Spain; Department of Pharmacology, University Miguel Hernández, Alicante, Spain
| | - José M González-Navajas
- Networked Biomedical Research Center for Hepatic and Digestive Diseases (CIBERehd), Institute of Health Carlos III, Madrid, Spain; Alicante Institute of Health and Biomedical Research (ISABIAL - FISABIO Foundation), Alicante, Spain.
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200
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Paeonol Inhibits Lipopolysaccharide-Induced HMGB1 Translocation from the Nucleus to the Cytoplasm in RAW264.7 Cells. Inflammation 2017; 39:1177-87. [PMID: 27106477 DOI: 10.1007/s10753-016-0353-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Transport of high-mobility group box 1 (HMGB1), a highly conserved non-histone DNA-binding protein, from the nucleus to the cytoplasm is induced by lipopolysaccharide (LPS). Secretion of HMGB1 appears to be a key lethal factor in sepsis, so it is considered to be a therapeutic target. Previous studies have suggested that paeonol (2'-hydroxy-4'-methoxyacetophenone), an active compound of Paeonia lactiflora Pallas, exerts anti-inflammatory effects. However, the effect of paeonol on HMGB1 is unknown. Here, we investigated the effect of paeonol on the expression, location, and secretion of HMGB1 in LPS-induced murine RAW264.7 cells. ELISA revealed HMGB1 supernatant concentrations of 615 ± 30 ng/mL in the LPS group and 600 ± 45, 560 ± 42, and 452 ± 38 ng/mL in cells treated with 0.2, 0.6, or 1 mM paeonol, respectively, suggesting that paeonol inhibits HMGB1 secretion induced by LPS. Immunohistochemistry and Western blotting revealed that paeonol decreased cytoplasmic HMGB1 and increased nuclear HMGB1. Chromatin immunoprecipitation microarrays suggested that HMGB1 relocation to the nucleus induced by paeonol might depress the action of Janus kinase/signal transducers and activators of transcription, chemokine, and mitogen-activated protein kinase pro-inflammatory signaling pathways. Paeonol was also found to inhibit tumor necrosis factor-α promoter activity in a dose-dependent manner. These results indicate that paeonol has the potential to be developed as a novel HMGB1-targeting therapeutic drug for the treatment of inflammatory diseases.
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