101
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Wang H, Shi X, Qiu M, Lv S, Zheng H, Niu B, Liu H. Hydrogen Sulfide Plays an Important Role by Influencing NLRP3 inflammasome. Int J Biol Sci 2020; 16:2752-2760. [PMID: 33110394 PMCID: PMC7586428 DOI: 10.7150/ijbs.47595] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Accepted: 08/12/2020] [Indexed: 12/12/2022] Open
Abstract
Inflammasome is a complex composed of several proteins and an important part of the natural immune system. Nucleotide-binding oligomerization domain-like receptor protein 3 (NLRP3) inflammasome is composed of NLRP3, apoptosis associated speck like protein (ASC) and pro-caspase-1. It plays an important role in many diseases. Hydrogen sulfide (H2S) is an important signaling molecule that regulates many physiological and pathological processes. Recent studies indicated that H2S played anti-inflammatory and pro-inflammatory roles in many diseases through influencing NLRP3 inflammasome, but its mechanism was not fully understood. This article reviewed the progress about the effects of H2S on NLRP3 inflammasome and its mechanisms involved in recent years to provide theoretical basis for in-depth study.
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Affiliation(s)
- Honggang Wang
- Institute of Biomedical Informatics, Bioinformatics Center, School of Basic Medical Sciences, Henan University, Kaifeng, Henan, 475000, China
| | - Xingzhuo Shi
- School of Life Science, Henan University, Kaifeng, Henan, 475000, China
| | - Mengyuan Qiu
- Institute of Biomedical Informatics, Bioinformatics Center, School of Basic Medical Sciences, Henan University, Kaifeng, Henan, 475000, China
| | - Shuangyu Lv
- Institute of Biomedical Informatics, Bioinformatics Center, School of Basic Medical Sciences, Henan University, Kaifeng, Henan, 475000, China
| | - Hong Zheng
- Institute of Biomedical Informatics, Bioinformatics Center, School of Basic Medical Sciences, Henan University, Kaifeng, Henan, 475000, China
| | - Baohua Niu
- Institute of Biomedical Informatics, Bioinformatics Center, School of Basic Medical Sciences, Henan University, Kaifeng, Henan, 475000, China
| | - Huiyang Liu
- Institute of Biomedical Informatics, Bioinformatics Center, School of Basic Medical Sciences, Henan University, Kaifeng, Henan, 475000, China
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102
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Role of interleukin-1 and inflammasomes in oral disease. J Oral Biosci 2020; 62:242-248. [PMID: 32771408 DOI: 10.1016/j.job.2020.07.003] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Revised: 07/23/2020] [Accepted: 07/30/2020] [Indexed: 01/01/2023]
Abstract
BACKGROUND Inflammation promotes immune cell infiltration into tissues and induces production of pro-inflammatory cytokines that mediate innate immune responses. Acute or temporary inflammation results in the required repair of the inflamed tissues. However, chronic inflammation leads to pathogenesis of inflammatory conditions such as periodontal disease. In periodontal tissues, pro-inflammatory cytokines mediate inflammatory responses and accelerate the bone-resorbing activity of osteoclasts, resulting in destruction of alveolar bone. Levels of interleukin-1 (IL-1), a major pro-inflammatory cytokine that strongly promotes osteoclastic activity, are elevated in oral tissues of patients with periodontitis. Therefore, elucidation of the mechanisms underlying IL-1 production will enhance our understanding of the pathogenesis of periodontal disease. HIGHLIGHT IL-1 has two isoforms: IL-1α and IL-1β. Both isoforms bind to the same IL-1 receptor and have identical biological activity. Unlike that of IL-1α, the IL-1β precursor is not bioactive. To induce its bioactivity, the IL-1β precursor is cleaved by caspase-1, whose activation is mediated by multiprotein complexes termed inflammasomes. Thus, IL-1β maturation and activity are strictly regulated by inflammasomes. This review highlights the current understanding of the molecular mechanisms underlying IL-1 production and the related inflammasome activity. CONCLUSION Inhibition of IL-1 production or the inflammasomes via their regulatory mechanisms may facilitate prevention or treatment of periodontal disease and other inflammatory diseases.
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103
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Speir M, Lawlor KE. RIP-roaring inflammation: RIPK1 and RIPK3 driven NLRP3 inflammasome activation and autoinflammatory disease. Semin Cell Dev Biol 2020; 109:114-124. [PMID: 32771377 DOI: 10.1016/j.semcdb.2020.07.011] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2020] [Revised: 07/13/2020] [Accepted: 07/16/2020] [Indexed: 01/05/2023]
Abstract
Autoinflammatory syndromes comprise a spectrum of clinical disorders characterised by recurrent, inflammatory episodes, many of which result from the release of the pro-inflammatory cytokine, interleukin-1β (IL-1β). Inflammation and programmed cell death are tightly linked, and lytic forms of cell death, such as necroptosis and pyroptosis, are considered to be inflammatory due to the release of damage-associated molecular patterns (DAMPs). In contrast, apoptosis is traditionally regarded as immunologically silent. Recent studies, however, have uncovered a high degree of crosstalk between cell death and inflammatory signalling pathways, and effectively consolidated them into one interconnected network that converges on NLRP3 inflammasome-mediated activation of IL-1β. The receptor-interacting protein kinases (RIPK) 1 and 3 are central to this network, as highlighted by the fact that mutations in genes encoding repressors of RIPK1 and/or RIPK3 activity can lead to heightened inflammation, particularly via NLRP3 inflammasome activation. In this review, we give an overview of extrinsic cell death and inflammatory signalling pathways, and then highlight the growing number of autoinflammatory diseases that are associated with aberrant cell death and inflammasome activation.
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Affiliation(s)
- Mary Speir
- Centre for Innate Immunity and Infectious Diseases, Hudson Institute of Medical Research, Melbourne, Victoria, Australia; Department of Molecular and Translational Science, Monash University, Melbourne, Victoria, Australia.
| | - Kate E Lawlor
- Centre for Innate Immunity and Infectious Diseases, Hudson Institute of Medical Research, Melbourne, Victoria, Australia; Department of Molecular and Translational Science, Monash University, Melbourne, Victoria, Australia.
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104
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Spalinger MR, Schwarzfischer M, Scharl M. The Role of Protein Tyrosine Phosphatases in Inflammasome Activation. Int J Mol Sci 2020; 21:E5481. [PMID: 32751912 PMCID: PMC7432435 DOI: 10.3390/ijms21155481] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Revised: 07/29/2020] [Accepted: 07/29/2020] [Indexed: 12/13/2022] Open
Abstract
Inflammasomes are multi-protein complexes that mediate the activation and secretion of the inflammatory cytokines IL-1β and IL-18. More than half a decade ago, it has been shown that the inflammasome adaptor molecule, ASC requires tyrosine phosphorylation to allow effective inflammasome assembly and sustained IL-1β/IL-18 release. This finding provided evidence that the tyrosine phosphorylation status of inflammasome components affects inflammasome assembly and that inflammasomes are subjected to regulation via kinases and phosphatases. In the subsequent years, it was reported that activation of the inflammasome receptor molecule, NLRP3, is modulated via tyrosine phosphorylation as well, and that NLRP3 de-phosphorylation at specific tyrosine residues was required for inflammasome assembly and sustained IL-1β/IL-18 release. These findings demonstrated the importance of tyrosine phosphorylation as a key modulator of inflammasome activity. Following these initial reports, additional work elucidated that the activity of several inflammasome components is dictated via their phosphorylation status. Particularly, the action of specific tyrosine kinases and phosphatases are of critical importance for the regulation of inflammasome assembly and activity. By summarizing the currently available literature on the interaction of tyrosine phosphatases with inflammasome components we here provide an overview how tyrosine phosphatases affect the activation status of inflammasomes.
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Affiliation(s)
- Marianne R. Spalinger
- Department of Gastroenterology and Hepatology, University Hospital Zurich, 8091 Zurich, Switzerland; (M.S.); (M.S.)
| | - Marlene Schwarzfischer
- Department of Gastroenterology and Hepatology, University Hospital Zurich, 8091 Zurich, Switzerland; (M.S.); (M.S.)
| | - Michael Scharl
- Department of Gastroenterology and Hepatology, University Hospital Zurich, 8091 Zurich, Switzerland; (M.S.); (M.S.)
- Zurich Center for Integrative Human Physiology, University of Zurich, 8006 Zurich, Switzerland
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105
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Hamarsheh S, Zeiser R. NLRP3 Inflammasome Activation in Cancer: A Double-Edged Sword. Front Immunol 2020; 11:1444. [PMID: 32733479 PMCID: PMC7360837 DOI: 10.3389/fimmu.2020.01444] [Citation(s) in RCA: 135] [Impact Index Per Article: 33.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2020] [Accepted: 06/03/2020] [Indexed: 12/21/2022] Open
Abstract
Inflammation is involved in tumor development and progression as well as antitumor response to therapy. In the past decade, the crosstalk between inflammation, immunity, and cancer has been investigated extensively, which led to the identification of several underlying mechanisms and cells involved. The formation of inflammasome complexes leads to the activation of caspase-1, production of interleukin (IL)-1β, and IL-18 and pyroptosis. Multiple studies have shown the involvement of NLRP3 inflammasome in tumorigenesis. Conversely, other reports have indicated a protective role in certain cancers. In this review, we summarize these contradictory roles of NLRP3 inflammasome in cancer, shed the light on oncogenic signaling leading to NLRP3 activation and IL-1β production and outline the current knowledge on therapeutic approaches.
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Affiliation(s)
- Shaima'a Hamarsheh
- Department of Medicine I, Medical Center-University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany.,Faculty of Biology, University of Freiburg, Freiburg, Germany
| | - Robert Zeiser
- Department of Medicine I, Medical Center-University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany.,German Cancer Consortium (DKTK) Partner Site Freiburg, German Cancer Research Center (DKFZ), Heidelberg, Germany.,Comprehensive Cancer Center Freiburg (CCCF), University of Freiburg, Freiburg, Germany.,Center for Biological Signalling Studies (BIOSS) and Center for Integrative Biological Signalling Studies (CIBSS), University of Freiburg, Freiburg, Germany
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106
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Relationship between the IL-1β serum concentration, mRNA levels and rs16944 genotype in the hyperglycemic normalization of T2D patients. Sci Rep 2020; 10:9985. [PMID: 32561825 PMCID: PMC7305205 DOI: 10.1038/s41598-020-66751-x] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2020] [Accepted: 05/19/2020] [Indexed: 01/01/2023] Open
Abstract
To evaluate Interleukin 1-beta (IL-1β) serum and mononuclear leucocyte mRNA levels, also rs16944 (−511C/T) genotype, in relation to hyperglycemic normalization in Type 2 diabetes (T2D) patients, we recruited 30 individuals recently T2D diagnosed with hyperglycemia studied at basal time and after 6 and 12 months of the normalization treatment. At basal time, the T polymorphic allele of the rs16944 was associated with lower IL-1β mRNA expression (p = 0.006); and higher glucose level was positive correlated to IL-1β protein levels (p = 0.015). After treatment, the individuals showed a significant decrease in glucose level (p = 0.003), but they did not express significant changes in the IL-1β serum levels. Surprisingly, we observed that the greater decreases in glucose level were associated to increased IL-1β serum levels (p = 0.040). This is the first follow-up study evaluating IL-1β mRNA expression and serum levels in hyperglycemic T2D individuals and after glycemic normalization treatment. The current results contribute to the knowledge of the relationship between inflammation and glucose metabolism in T2D.
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107
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Orning P, Lien E. Multiple roles of caspase-8 in cell death, inflammation, and innate immunity. J Leukoc Biol 2020; 109:121-141. [PMID: 32531842 DOI: 10.1002/jlb.3mr0420-305r] [Citation(s) in RCA: 82] [Impact Index Per Article: 20.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2020] [Revised: 04/16/2020] [Accepted: 04/30/2020] [Indexed: 12/20/2022] Open
Abstract
Caspase-8 is an apical caspase involved in the programmed form of cell death called apoptosis that is critically important for mammalian development and immunity. Apoptosis was historically described as immunologically silent in contrast to other types of programmed cell death such as necroptosis or pyroptosis. Recent reports suggest considerable crosstalk between these different forms of cell death. It is becoming increasingly clear that caspase-8 has many non-apoptotic roles, participating in multiple processes including regulation of necroptosis (mediated by receptor-interacting serine/threonine kinases, RIPK1-RIPK3), inflammatory cytokine expression, inflammasome activation, and cleavage of IL-1β and gasdermin D, and protection against shock and microbial infection. In this review, we discuss the involvement of caspase-8 in cell death and inflammation and highlight its role in innate immune responses and in the relationship between different forms of cell death. Caspase-8 is one of the central components in this type of crosstalk.
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Affiliation(s)
- Pontus Orning
- UMass Medical School, Program in Innate Immunity, Division of Infectious Diseases and Immunology, Department of Medicine, Worcester, Massachusetts, USA.,Centre of Molecular Inflammation Research, Department of Clinical and Molecular Medicine, Norwegian University of Science and Technology (NTNU), Trondheim, Norway
| | - Egil Lien
- UMass Medical School, Program in Innate Immunity, Division of Infectious Diseases and Immunology, Department of Medicine, Worcester, Massachusetts, USA.,Centre of Molecular Inflammation Research, Department of Clinical and Molecular Medicine, Norwegian University of Science and Technology (NTNU), Trondheim, Norway
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108
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Zheng D, Liwinski T, Elinav E. Inflammasome activation and regulation: toward a better understanding of complex mechanisms. Cell Discov 2020; 6:36. [PMID: 32550001 PMCID: PMC7280307 DOI: 10.1038/s41421-020-0167-x] [Citation(s) in RCA: 488] [Impact Index Per Article: 122.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2019] [Accepted: 04/05/2020] [Indexed: 02/07/2023] Open
Abstract
Inflammasomes are cytoplasmic multiprotein complexes comprising a sensor protein, inflammatory caspases, and in some but not all cases an adapter protein connecting the two. They can be activated by a repertoire of endogenous and exogenous stimuli, leading to enzymatic activation of canonical caspase-1, noncanonical caspase-11 (or the equivalent caspase-4 and caspase-5 in humans) or caspase-8, resulting in secretion of IL-1β and IL-18, as well as apoptotic and pyroptotic cell death. Appropriate inflammasome activation is vital for the host to cope with foreign pathogens or tissue damage, while aberrant inflammasome activation can cause uncontrolled tissue responses that may contribute to various diseases, including autoinflammatory disorders, cardiometabolic diseases, cancer and neurodegenerative diseases. Therefore, it is imperative to maintain a fine balance between inflammasome activation and inhibition, which requires a fine-tuned regulation of inflammasome assembly and effector function. Recently, a growing body of studies have been focusing on delineating the structural and molecular mechanisms underlying the regulation of inflammasome signaling. In the present review, we summarize the most recent advances and remaining challenges in understanding the ordered inflammasome assembly and activation upon sensing of diverse stimuli, as well as the tight regulations of these processes. Furthermore, we review recent progress and challenges in translating inflammasome research into therapeutic tools, aimed at modifying inflammasome-regulated human diseases.
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Affiliation(s)
- Danping Zheng
- Immunology Department, Weizmann Institute of Science, Rehovot, 7610001 Israel
- Department of Gastroenterology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Timur Liwinski
- Immunology Department, Weizmann Institute of Science, Rehovot, 7610001 Israel
- 1st Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Eran Elinav
- Immunology Department, Weizmann Institute of Science, Rehovot, 7610001 Israel
- Cancer-Microbiome Division Deutsches Krebsforschungszentrum (DKFZ), Neuenheimer Feld 280, 69120 Heidelberg, Germany
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109
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Gao H, Wang X, Qu X, Zhai J, Tao L, Zhang Y, Song Y, Zhang W. Omeprazole attenuates cisplatin-induced kidney injury through suppression of the TLR4/NF-κB/NLRP3 signaling pathway. Toxicology 2020; 440:152487. [PMID: 32418911 DOI: 10.1016/j.tox.2020.152487] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2020] [Revised: 04/01/2020] [Accepted: 04/30/2020] [Indexed: 12/22/2022]
Abstract
Renal toxicity is the primary factor that limits clinical use of cisplatin (CP). A previous study showed that omeprazole (OME) protected against CP-induced toxicity in human renal tubular HK-2 cells and rat kidneys. However, the protective mechanisms of OME have not been characterized. We evaluated the ability of OME to inhibit CP-induced inflammation, and characterized the pathways responsible for this effect. Rats were randomly divided into five groups (n = 10/group). The OME groups were intraperitoneally injected with 1.8 or 3.6 mg OME /kg body weight once daily for 5 days. One hour after final administration of vehicle or OME, all rats (except those in control group and OME alone group) were intraperitoneally injected with 15 mg/kg CP. Twenty-four hours after CP injection, the surgery was applied. The time points and dosing of OME and CP were calculated based on previous studies and the therapeutic dose for patients. Omeprazole attenuated CP-induced apoptosis and damage in vivo and in vitro, as evidenced by increased cell viability and prevention of structural damage. Omeprazole ameliorated CP-induced renal injury through inhibition of NF-κB activation and IκBα degradation, and down-regulation of toll-like receptor 4 (TLR4) and Nod-like receptor protein 3 (NLRP3). Lipopolysaccharide, a TLR4 agonist, was used to verify this mechanism. The results indicated that OME inhibited CP-induced expression of inflammatory proteins, and this effect was blunted by co-treatment with LPS in HK-2 cells. These findings suggested that the protective effects of OME against CP-induced kidney damage may occur through inhibition of the TLR4/NF-κB/NLRP3 signaling pathway. This study provided evidence that OME may be a promising agent to inhibit CP-induced nephrotoxicity.
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Affiliation(s)
- Huan Gao
- Department of Pharmacy, the First Hospital of Jilin University, Changchun, Jilin, 130021, PR China
| | - Xiangfeng Wang
- Department of Pharmacy, the First Hospital of Jilin University, Changchun, Jilin, 130021, PR China
| | - Xiaoyu Qu
- Department of Pharmacy, the First Hospital of Jilin University, Changchun, Jilin, 130021, PR China
| | - Jinghui Zhai
- Department of Pharmacy, the First Hospital of Jilin University, Changchun, Jilin, 130021, PR China
| | - Lina Tao
- Department of Pharmacy, the First Hospital of Jilin University, Changchun, Jilin, 130021, PR China
| | - Yueming Zhang
- Department of Pharmacy, the First Hospital of Jilin University, Changchun, Jilin, 130021, PR China
| | - Yanqing Song
- Department of Pharmacy, the First Hospital of Jilin University, Changchun, Jilin, 130021, PR China.
| | - Wenrui Zhang
- Department of Pharmacy, the First Hospital of Jilin University, Changchun, Jilin, 130021, PR China.
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110
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Rai RC, Bagul PK, Banerjee SK. NLRP3 inflammasome drives inflammation in high fructose fed diabetic rat liver: Effect of resveratrol and metformin. Life Sci 2020; 253:117727. [PMID: 32371063 DOI: 10.1016/j.lfs.2020.117727] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2020] [Revised: 04/10/2020] [Accepted: 04/24/2020] [Indexed: 12/23/2022]
Abstract
AIMS To unravel the underlying mechanism of hepatic inflammation during type 2 diabetes (T2DM), we established the diabetic rat model by feeding with high fructose diet for twenty weeks and studied the involvement of inflammasome in the liver of these rats. MATERIALS AND METHODS Male SD rats weighing 180-200 g were divided in four groups: 1) Control (Con group) rats were fed with corn starch diet, 2) diabetic (Dia group) rats were fed with 65% of fructose, 3) diabetic along with resveratrol (10 mg/kg/day); p.o. (Dia + Resv group) and 4) diabetic along with metformin (300 mg/kg/day); p.o. (Dia + Met group), for twenty weeks. We evaluated the establishment of T2DM in fructose fed rats and the effect of resveratrol and metformin treatment on different diabetic parameters in these rats. Further we investigated the role of NLRP3 inflammasome on T2DM induced liver inflammation and effect of resveratrol and metformin treatment on NLRP3 inflammasome driven inflammatory response. KEY FINDINGS Rats from Dia group; manifested insulin resistance, hyperinsulinemia, hyperglycemia, elevated uric acid along with hypertriglyceridemia after fructose feeding for twenty weeks. Mostly, above parameters were attenuated in resveratrol and metformin treated groups. Expression of NLRP3 inflammasome components in liver were increased in Dia group rats with elevated transcript levels of pro-inflammatory cytokines. Histopathological examination revealed increase in glycogen content and fibrosis in Dia group rats; which was considerably reduced with resveratrol and metformin treatment. SIGNIFICANCE Our study suggests that management of inflammation may be considered as an alternative approach to prevent liver tissue injury during chronic diabetic condition.
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Affiliation(s)
- Ramesh Chandra Rai
- Immunology Group, International Centre for Genetic Engineering and Biotechnology (ICGEB), Aruna Asaf Ali Marg, New Delhi 110067, India.
| | - Pankaj K Bagul
- Translational Health Science and Technology Institute (THSTI), Faridabad 121001, India
| | - Sanjay Kumar Banerjee
- Translational Health Science and Technology Institute (THSTI), Faridabad 121001, India; Department of Biotechnology, National Institute of Pharmaceutical Education and Research (NIPER), Guwahati 781101, India.
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111
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Hu X, Chen H, Xu H, Wu Y, Wu C, Jia C, Li Y, Sheng S, Xu C, Xu H, Ni W, Zhou K. Role of Pyroptosis in Traumatic Brain and Spinal Cord Injuries. Int J Biol Sci 2020; 16:2042-2050. [PMID: 32549752 PMCID: PMC7294939 DOI: 10.7150/ijbs.45467] [Citation(s) in RCA: 52] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2020] [Accepted: 04/05/2020] [Indexed: 12/11/2022] Open
Abstract
Central nervous system (CNS) trauma, including traumatic brain injury (TBI) and spinal cord injury (SCI), remains a leading cause for morbidity and mortality worldwide. Past research has shown that cell death plays a critical role in the pathophysiology of CNS injuries. More recently, pyroptosis has been identified as a form of programmed inflammatory cell death, and it is a unique form of cell death in various aspects. Mechanistically, pyroptosis can be categorized into canonical (mediated by caspase-1) and non-canonical (mediated by caspase-4/5/11). In canonical pyroptosis, Nod-like receptors (NLRs) inflammasomes play a critical role, and their activation promotes the maturation and secretion of the inflammatory cytokines interleukin-1β/18 (IL-1β/18), cleavage of gasdermin D (GSDMD), and ultimately pyroptotic cell death. Despite a plethora of new knowledge regarding pyroptosis, detailed understanding of how pyroptosis is involved in CNS injuries and possible ways to improve clinical outcomes following CNS injuries remain elusive. This review discusses the current knowledge on how pyroptosis is involved in CNS injuries, focusing on new discoveries regarding how pyroptosis activation occurs, differences between CNS cell types following injury, time-course of inflammatory responses, and key regulatory steps of pyroptosis. In addition, we highlight various investigational agents that are capable of regulating key steps in pyroptotic cell death, and we discuss how these agents may be used as therapies to improve outcomes following CNS trauma.
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Affiliation(s)
- Xinli Hu
- Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou 325027, China.,Zhejiang Provincial Key Laboratory of Orthopaedics, Wenzhou 325027, China
| | - Huanwen Chen
- University of Maryland School of Medicine, Baltimore, MD 21201, USA
| | - Hui Xu
- Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou 325027, China.,Zhejiang Provincial Key Laboratory of Orthopaedics, Wenzhou 325027, China
| | - Yaosen Wu
- Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou 325027, China.,Zhejiang Provincial Key Laboratory of Orthopaedics, Wenzhou 325027, China
| | - Chenyu Wu
- Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou 325027, China.,Zhejiang Provincial Key Laboratory of Orthopaedics, Wenzhou 325027, China
| | - Chang Jia
- Pediatric Research Institute, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou 325027, China
| | - Yao Li
- Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou 325027, China.,Zhejiang Provincial Key Laboratory of Orthopaedics, Wenzhou 325027, China
| | - Sunren Sheng
- Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou 325027, China.,Zhejiang Provincial Key Laboratory of Orthopaedics, Wenzhou 325027, China
| | - Cong Xu
- Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou 325027, China.,Zhejiang Provincial Key Laboratory of Orthopaedics, Wenzhou 325027, China
| | - Huazi Xu
- Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou 325027, China.,Zhejiang Provincial Key Laboratory of Orthopaedics, Wenzhou 325027, China
| | - Wenfei Ni
- Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou 325027, China.,Zhejiang Provincial Key Laboratory of Orthopaedics, Wenzhou 325027, China
| | - Kailiang Zhou
- Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou 325027, China.,Zhejiang Provincial Key Laboratory of Orthopaedics, Wenzhou 325027, China
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112
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O'Brien WT, Pham L, Symons GF, Monif M, Shultz SR, McDonald SJ. The NLRP3 inflammasome in traumatic brain injury: potential as a biomarker and therapeutic target. J Neuroinflammation 2020; 17:104. [PMID: 32252777 PMCID: PMC7137518 DOI: 10.1186/s12974-020-01778-5] [Citation(s) in RCA: 136] [Impact Index Per Article: 34.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2020] [Accepted: 03/17/2020] [Indexed: 01/14/2023] Open
Abstract
There is a great clinical need to identify the underlying mechanisms, as well as related biomarkers, and treatment targets, for traumatic brain injury (TBI). Neuroinflammation is a central pathophysiological feature of TBI. NLRP3 inflammasome activity is a necessary component of the innate immune response to tissue damage, and dysregulated inflammasome activity has been implicated in a number of neurological conditions. This paper introduces the NLRP3 inflammasome and its implication in the pathogenesis of neuroinflammatory-related conditions, with a particular focus on TBI. Although its role in TBI has only recently been identified, findings suggest that priming and activation of the NLRP3 inflammasome are upregulated following TBI. Moreover, recent studies utilizing specific NLRP3 inhibitors have provided further evidence that this inflammasome is a major driver of neuroinflammation and neurobehavioral disturbances following TBI. In addition, there is emerging evidence that circulating inflammasome-associated proteins may have utility as diagnostic biomarkers of neuroinflammatory conditions, including TBI. Finally, novel and promising areas of research will be highlighted, including the potential involvement of the NLRP3 inflammasome in mild TBI, how factors such as biological sex may affect NLRP3 activity in TBI, and the use of emerging biomarker platforms. Taken together, this review highlights the exciting potential of the NLRP3 inflammasome as a target for treatments and biomarkers that may ultimately be used to improve TBI management.
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Affiliation(s)
- William T O'Brien
- Department of Neuroscience, Monash University, Melbourne, VIC, Australia
| | - Louise Pham
- Department of Physiology, Anatomy and Microbiology, La Trobe University, Bundoora, VIC, 3086, Australia
| | - Georgia F Symons
- Department of Neuroscience, Monash University, Melbourne, VIC, Australia
| | - Mastura Monif
- Department of Neuroscience, Monash University, Melbourne, VIC, Australia.,Department of Neurology, Alfred Health, Melbourne, VIC, 3004, Australia.,Department of Neurology, Melbourne Health, Melbourne, VIC, 3004, Australia.,Department of Physiology, The University of Melbourne, Melbourne, VIC, 3052, Australia
| | - Sandy R Shultz
- Department of Neuroscience, Monash University, Melbourne, VIC, Australia.,Department of Medicine, University of Melbourne, Melbourne, VIC, 3052, Australia
| | - Stuart J McDonald
- Department of Neuroscience, Monash University, Melbourne, VIC, Australia. .,Department of Physiology, Anatomy and Microbiology, La Trobe University, Bundoora, VIC, 3086, Australia.
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Wang L, Zhu L, Duan C, Li L, Chen G. Total saponin of Dioscorea collettii attenuates MSU crystal‑induced inflammation via inhibiting the activation of the NALP3 inflammasome and caspase‑1 in THP‑1 macrophages. Mol Med Rep 2020; 21:2466-2474. [PMID: 32236574 PMCID: PMC7185280 DOI: 10.3892/mmr.2020.11035] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2019] [Accepted: 01/30/2020] [Indexed: 01/13/2023] Open
Abstract
Total saponins extracted from Dioscorea collettii (TSD), extracts of the Chinese herb Dioscorea, are thought to exhibit therapeutic benefit in gouty arthritis. However, its exact mechanism remains unclear. The current study aimed to elucidate the underlying mechanisms by investigating the effects of TSD on the inflammation induced by monosodium urate (MSU) crystals in THP-1 macrophages. The viability of THP-1 macrophages was examined using the MTT assay and the levels of inflammatory cytokines, including interleukin (IL)-1β, IL-18 and tumor necrosis factor (TNF)-α, released by the cells were quantitatively measured using ELISA kits. The results revealed that the protein level of cluster of differentiation 11b increased in THP-1 cells treated with 100 ng/ml phorbol ester, suggesting that monocytic THP-1 cells were successfully differentiated into macrophages. TSD decreased the levels of inflammatory cytokines, including TNF-α, IL-18 and IL-1β, secreted by THP-1 macrophages. As the release of IL-1β and IL-18 is dependent on the NLR family pyrin domain containing 3 (NALP3) inflammasome and caspase-1, the current study investigated the effect of TSD on the aforementioned proteins. The results revealed that TSD decreased the protein levels of NALP3 and apoptosis-associated speck-like, which serve important roles in the assembly of the NALP3 inflammasome. Furthermore, NALP3 inflammasome-related proteins were also decreased by TSD in rotenone induced THP-1 macrophages, TSD inhibited the activation of caspase-1 and rotenone-induced NALP3 inflammasome activation in THP-1 macrophages. The results obtained in the current study revealed that TSD attenuated MSU crystal-induced inflammation by inhibiting rotenone-induced activation of the NALP3 inflammasome and caspase-1, suggesting that these two proteins may be novel targets for the treatment of gouty arthritis.
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Affiliation(s)
- Lu Wang
- College of Integrative Medicine, Anhui University of Chinese Medicine, Hefei, Anhui 230012, P.R. China
| | - Liran Zhu
- Anhui Institute of Pediatric Research, Anhui Provincial Children's Hospital, Hefei, Anhui 230051, P.R. China
| | - Chenfangyuan Duan
- School of Chinese Medicine, Macau University of Science and Technology, Macau SAR 999078, P.R. China
| | - Lu Li
- College of Integrative Medicine, Anhui University of Chinese Medicine, Hefei, Anhui 230012, P.R. China
| | - Guangliang Chen
- College of Integrative Medicine, Anhui University of Chinese Medicine, Hefei, Anhui 230012, P.R. China
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114
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Neudorf H, Myette-Côté É, P. Little J. The Impact of Acute Ingestion of a Ketone Monoester Drink on LPS-Stimulated NLRP3 Activation in Humans with Obesity. Nutrients 2020; 12:nu12030854. [PMID: 32209983 PMCID: PMC7146505 DOI: 10.3390/nu12030854] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2019] [Revised: 03/10/2020] [Accepted: 03/19/2020] [Indexed: 12/22/2022] Open
Abstract
Activation of the NOD-like receptor pyrin-domain containing 3 (NLRP3) inflammasome is associated with chronic low-grade inflammation in metabolic diseases such as obesity. Mechanistic studies have shown that β-hydroxybutyrate (OHB) attenuates activation of NLRP3, but human data are limited. In a randomized, double-blind, placebo-controlled crossover trial (n = 11) we tested the hypothesis that acutely raising β-OHB by ingestion of exogenous ketones would attenuate NLRP3 activation in humans with obesity. Blood was sampled before and 30 min post-ingestion of a ketone monoester drink ((R)-3-hydroxybutyl (R)-3-hydroxybutyrate, 482 mg/kg body mass) or placebo. A 75 g oral glucose load was then ingested, and a third blood sample was obtained 60 min following glucose ingestion. NLRP3 activation was quantified by assessing monocyte caspase-1 activation and interleukin (IL)-1β secretion in ex vivo lipopolysaccharide (LPS)-stimulated whole-blood cultures. LPS-stimulated caspase-1 activation increased following glucose ingestion (main effect of time; p = 0.032), with no differences between conditions. IL-1β secretion did not differ between conditions but was lower 60 min post-glucose ingestion compared to the fasting baseline (main effect of time, p = 0.014). Plasma IL-1β was detectable in ~80% of samples and showed a decrease from fasting baseline to 60 min in the ketone condition only (condition × time interaction, p = 0.01). In individuals with obesity, an excursion into hyperglycemia following ingestion of a glucose load augments LPS-induced activation of caspase-1 in monocytes with no apparent impact of raising circulating β-OHB concentration via ingestion of exogenous ketones. Exogenous ketone supplementation may impact plasma IL-1β, but these findings require confirmation in studies with larger sample sizes.
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115
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RIPK3 collaborates with GSDMD to drive tissue injury in lethal polymicrobial sepsis. Cell Death Differ 2020; 27:2568-2585. [PMID: 32152555 DOI: 10.1038/s41418-020-0524-1] [Citation(s) in RCA: 70] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2019] [Revised: 02/21/2020] [Accepted: 02/21/2020] [Indexed: 12/24/2022] Open
Abstract
Sepsis is a systemic inflammatory disease causing life-threatening multi-organ dysfunction. Accumulating evidences suggest that two forms of programmed necrosis, necroptosis and pyroptosis triggered by the pathogen component lipopolysaccharide (LPS) and inflammatory cytokines, play important roles in the development of bacterial sepsis-induced shock and tissue injury. Sepsis-induced shock and tissue injury required receptor-interacting protein kinase-3 (RIPK3) and mixed lineage kinase domain-like protein (MLKL) phosphorylation, caspase11 activation and gasdermin D (GSDMD) cleavage. However, the synergistic effect of necroptosis and pyroptosis in the pathological progress of sepsis remains elusive. In this study, we found that blockage of both necroptosis and pyroptosis (double deletion of Ripk3/Gsdmd or Mlkl/Gsdmd) resulted in accumulative protection against septic shock, systemic blood clotting and multi-organ injury in mice. Bone marrow transplantation confirmed that necroptosis and pyroptosis in both myeloid and nonmyeloid cells are indispensable in the progression of sepsis-induced multi-organ injury. Both RIPK3 and GSDMD signaling collaborated to amplify necroinflammation and tissue factor release in macrophages and endothelial cells, which led to tissue injury. Furthermore, cell death induced by inflammatory cytokines and high-mobility group box 1 could be prevented by double ablation of Ripk3/Gsdmd or Mlkl/Gsdmd, suggesting that a positive feedback loop interconnecting RIPK3/MLKL and GSDMD machinery and inflammation facilitated sepsis progression. Collectively, our findings demonstrated that RIPK3-mediated necroptosis and GSDMD-mediated pyroptosis collaborated to amply inflammatory signaling and enhance tissue injury in the process of sepsis, which may shed new light on two potential targets of combined therapeutic interventions for this highly lethal disorder.
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116
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Xu LJ, Chen RC, Ma XY, Zhu Y, Sun GB, Sun XB. Scutellarin protects against myocardial ischemia-reperfusion injury by suppressing NLRP3 inflammasome activation. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2020; 68:153169. [PMID: 31999976 DOI: 10.1016/j.phymed.2020.153169] [Citation(s) in RCA: 46] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Revised: 12/08/2019] [Accepted: 01/06/2020] [Indexed: 06/10/2023]
Abstract
BACKGROUND Activation of NLRP3 inflammasome plays a key role in cardiac dysfunction for acute myocardial ischemia-reperfusion injury. Scutellarin (Scu) is a flavonoid purified from Erigeron breviscapus. Whether Scu has any influence on the activation of NLRP3 inflammasome in cardiomyocytes remains unknown. PURPOSE We aimed to examine the therapeutic effect of Scu on cardiomyocyte ischemia-reperfusion (I/R) injury and its effect on NLRP3 inflammasome in rats with acute myocardial I/R injury and anoxia/reoxygenation (A/R)-induced H9c2 injuries. METHODS Heart injuries were induced through 30 min of ischemia followed by 24 h of reperfusion. Scu was intraperitoneally administered 15 min before vascular ligation. Effects of Scu on cardiac injury were detected by echocardiograms, TTC staining, and histological and immunohistochemical analyses. The effects of Scu on biochemical parameters were analyzed. H9c2 cells were pretreated with different concentrations of Scu for 6 h before A/R exposure. Afterward, cell viability, LDH release, and Hoechst 33342 and peromide iodine double staining were determined. Western blot analyses of proteins, including those involved in autophagy, NLRP3, mTOR complex 1 (mTORC1), and Akt signaling, were conducted. RESULTS In vivo study revealed that Scu improved diastolic dysfunction, ameliorated myocardium structure abnormality, inhibited myocyte apoptosis and inflammatory response, and promoted autophagy. Scu reduced NLRP3 inflammasome activation, inhibited mTORC1 activity, and increased Akt phosphorylation. In vitro investigation showed the same results. The Scu-mediated NLRP3 inflammasome and mTORC1 inhibition and cardioprotection were abolished through the genetic silencing of Akt by siRNA. CONCLUSIONS The cardioprotective effect of Scu was achieved through its anti-inflammatory effect. It suppressed the activation of NLRP3 inflammasome. In addition, inflammasome restriction by Scu was dependent on Akt activation and mTORC1 inhibition.
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Affiliation(s)
- Li-Jiao Xu
- School of Life and Environment Sciences, Harbin University of Commerce, Harbin 150076, China.; Institute of Medicinal Plant Development, Chinese Academy of Medical Science, Peking Union Medical College, No. 151, Malianwa North Road, Haidian District, Beijing 100094, China
| | - Rong-Chang Chen
- Institute of Medicinal Plant Development, Chinese Academy of Medical Science, Peking Union Medical College, No. 151, Malianwa North Road, Haidian District, Beijing 100094, China.; Beijing Key Laboratory of Innovative Drug Discovery of Traditional Chinese Medicine (Natural Medicine) and Translational Medicine, Institute of Medicinal Plant Development, Peking Union Medical College and Chinese Academy of Medical Sciences, No. 151, Malianwa North Road, Haidian District, Beijing 100094, China..
| | - Xiao-Yu Ma
- School of Life and Environment Sciences, Harbin University of Commerce, Harbin 150076, China
| | - Yue Zhu
- School of Life and Environment Sciences, Harbin University of Commerce, Harbin 150076, China
| | - Gui-Bo Sun
- Institute of Medicinal Plant Development, Chinese Academy of Medical Science, Peking Union Medical College, No. 151, Malianwa North Road, Haidian District, Beijing 100094, China.; Zhongguancun Open Laboratory of the Research and Development of Natural Medicine and Health Products, Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences & Peking Union Medical College, No. 151, Malianwa North Road, Haidian District, Beijing 100094, China..
| | - Xiao-Bo Sun
- Institute of Medicinal Plant Development, Chinese Academy of Medical Science, Peking Union Medical College, No. 151, Malianwa North Road, Haidian District, Beijing 100094, China.; Zhongguancun Open Laboratory of the Research and Development of Natural Medicine and Health Products, Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences & Peking Union Medical College, No. 151, Malianwa North Road, Haidian District, Beijing 100094, China..
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117
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Sun Y, Liu Y, Guan X, Kang J, Wang X, Liu Q, Li D, Xu H, Tao Z, Deng Y. Atorvastatin inhibits renal inflammatory response induced by calcium oxalate crystals via inhibiting the activation of TLR4/NF-κB and NLRP3 inflammasome. IUBMB Life 2020; 72:1065-1074. [PMID: 32083808 DOI: 10.1002/iub.2250] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2019] [Accepted: 01/30/2020] [Indexed: 12/11/2022]
Abstract
This study aimed to investigate the renal protective effect of atorvastatin (ATV) on the kidney inflammation induced by calcium oxalate (CaOx) crystals. A cell model of cell-crystal interactions and a rat model of CaOx kidney stone were established. The expressions of TLR4, NF-κB, NLRP3, and cleaved caspase-1 in cells and rat kidney tissues were detected using Western blot, immunohistochemical, and/or immunofluorescence. The concentrations of malondialdehyde (MDA), superoxide dismutase (SOD), reactive oxygen species (ROS) in cells, and lactic acid dehydrogenase (LDH) in the culture medium were measured. The secreted levels of interleukin (IL)-1β, IL-18, IL-6, and tumor necrosis factor-α (TNF-α) were examined by ELISA. The serum levels of creatinine (CRE) and blood urea nitrogen (BUN) were measured. von Kossa staining was used for the evaluation of renal lens deposition. The CaOx model group showed significantly decreased SOD level; increased concentrations of MDA; ROS and LDH; elevated expressions of TLR4, NF-κB, NLRP3, and cleaved caspase-1; and the elevated release of IL-1β, IL-18, IL-6, and TNF- α as compared to the control group. The treatment with ATV significantly inhibited the formation of CaOx kidney stone by increasing the level of SOD; downregulating MDA, ROS, and LDH; inhibiting the expressions of TLR4, NF-κB, NLRP3 and cleaved caspase-1; and blocking the secretion of inflammatory cytokines. In addition, the serum levels of CRE and BUN, and the intrarenal crystal deposition were also significantly decreased in ATV-treated rats. In summary, oxidative stress, TLR4/NF-κB, and NLRP3 inflammasome pathways are involved in renal inflammatory responses induced by CaOx crystals. ATV treatment significantly suppressed oxidative stress, inhibited the activation of TLR4/NF-κB and NLRP3 inflammasome pathways, and decreased the release of inflammatory mediators, thereby ameliorating CaOx crystal-induced damage and crystal deposition in HK-2 cells and rat kidney tissues.
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Affiliation(s)
- Yan Sun
- Department of Urology, the Langdong Hospital of Guangxi Medical University, Nanning, China
| | - Yunlong Liu
- Department of Urology, the First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Xiaofeng Guan
- Department of Urology, the First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Juening Kang
- Department of Urology, the Langdong Hospital of Guangxi Medical University, Nanning, China
| | - Xiang Wang
- Department of Urology, the Langdong Hospital of Guangxi Medical University, Nanning, China.,Department of Urology, the First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Quan Liu
- Department of Urology, the First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Derong Li
- Department of Urology, the First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Hua Xu
- Department of Urology, the First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Zhiwei Tao
- Department of Urology, the Langdong Hospital of Guangxi Medical University, Nanning, China.,Department of Urology, the First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Yaoliang Deng
- Department of Urology, the Langdong Hospital of Guangxi Medical University, Nanning, China.,Department of Urology, the First Affiliated Hospital of Guangxi Medical University, Nanning, China
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118
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Zhang H, Chen Y, Chen Y, Li Y, Jia P, Ji S, Zhou Y, Wang T. Dietary pterostilbene supplementation attenuates intestinal damage and immunological stress of broiler chickens challenged with lipopolysaccharide. J Anim Sci 2020; 98:skz373. [PMID: 31822918 PMCID: PMC6986435 DOI: 10.1093/jas/skz373] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Accepted: 12/10/2019] [Indexed: 12/12/2022] Open
Abstract
The present study explored the potential effect of pterostilbene as a prophylactic treatment on the lipopolysaccharide (LPS)-induced intestinal injury of broiler chickens by monitoring changes in mucosal injury indicators, redox status, and inflammatory responses. In total, 192 one-day-old male Ross 308 broiler chicks were randomly divided into four groups. This trial consisted of a 2 × 2 factorial design with a diet factor (supplemented with 0 or 400 mg/kg pterostilbene from 1 to 22 d of age) and a stress factor (intraperitoneally injected with saline or LPS at 5.0 mg/kg BW at 21 da of age). The results showed that LPS challenge induced a decrease in BW gain (P < 0.001) of broilers during a 24-h period postinjection; however, this decrease was prevented by pterostilbene supplementation (P = 0.031). Administration of LPS impaired the intestinal integrity of broilers, as indicated by increased plasma diamine oxidase (DAO) activity (P = 0.014) and d-lactate content (P < 0.001), reduced jejunal villus height (VH; P < 0.001) and the ratio of VH to crypt depth (VH:CD; P < 0.001), as well as a decreased mRNA level of jejunal tight junction protein 1 (ZO-1; P = 0.002). In contrast, pterostilbene treatment increased VH:CD (P = 0.018) and upregulated the mRNA levels of ZO-1 (P = 0.031) and occludin (P = 0.024) in the jejunum. Consistently, pterostilbene counteracted the LPS-induced increased DAO activity (P = 0.011) in the plasma. In addition, the LPS-challenged broilers exhibited increases in nuclear accumulation of nuclear factor kappa B (NF-κB) p65 (P < 0.001), the protein content of tumor necrosis factor α (P = 0.033), and the mRNA abundance of IL-1β (P = 0.042) and nucleotide-binding oligomerization domain-like receptor protein 3 (NLRP3; P = 0.019). In contrast, pterostilbene inhibited the nuclear translocation of NF-κB p65 (P = 0.039) and suppressed the mRNA expression of IL-1β (P = 0.003) and NLRP3 (P = 0.049) in the jejunum. Moreover, pterostilbene administration induced a greater amount of reduced glutathione (P = 0.017) but a lower content of malondialdehyde (P = 0.023) in the jejunum of broilers compared with those received a basal diet. Overall, the current study indicates that dietary supplementation with pterostilbene may play a beneficial role in alleviating the intestinal damage of broiler chicks under the conditions of immunological stress.
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Affiliation(s)
- Hao Zhang
- College of Animal Science & Technology, Nanjing Agricultural University, Nanjing, Jiangsu, China
- Postdoctoral Research Station of Clinical Veterinary Medicine, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, Jiangsu, China
- Shanghai Key Laboratory of Veterinary Biotechnology, Shanghai, China
| | - Yanan Chen
- College of Animal Science & Technology, Nanjing Agricultural University, Nanjing, Jiangsu, China
| | - Yueping Chen
- College of Animal Science & Technology, Nanjing Agricultural University, Nanjing, Jiangsu, China
- Postdoctoral Research Station of Food Science and Engineering, College of Food Science and Technology, Nanjing Agricultural University, Nanjing, Jiangsu, China
| | - Yue Li
- Institute of Animal Science, Jiangsu Academy of Agricultural Sciences, Nanjing, China
| | - Peilu Jia
- College of Animal Science & Technology, Nanjing Agricultural University, Nanjing, Jiangsu, China
| | - Shuli Ji
- College of Animal Science & Technology, Nanjing Agricultural University, Nanjing, Jiangsu, China
| | - Yanmin Zhou
- College of Animal Science & Technology, Nanjing Agricultural University, Nanjing, Jiangsu, China
| | - Tian Wang
- College of Animal Science & Technology, Nanjing Agricultural University, Nanjing, Jiangsu, China
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119
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Ferguson SA, Varma V, Sloper D, Panos JJ, Sarkar S. Increased inflammation in BA21 brain tissue from African Americans with Alzheimer's disease. Metab Brain Dis 2020; 35:121-133. [PMID: 31823110 DOI: 10.1007/s11011-019-00512-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/19/2019] [Accepted: 10/25/2019] [Indexed: 12/21/2022]
Abstract
Chronic neuroinflammation is strongly associated with AD and altered peripheral and central levels of chemokines and cytokines have been frequently described in those with AD. Given the increasing evidence of ethnicity-related differences in AD, it was of interest to determine if those altered chemokine and cytokine levels are ethnicity-related. Because African Americans exhibit a higher incidence of AD and increased symptom severity, we explored chemokine and cytokine concentrations in post-mortem brain tissue from the BA21 region of African Americans and Caucasians with AD using multiplex assays. IL-1β, MIG, TRAIL, and FADD levels were significantly increased in African Americans while levels of IL-3 and IL-8 were significantly decreased. Those effects did not interact with gender; however, overall levels of CCL25, CCL26 and CX3CL1 were significantly decreased in women. The NLRP3 inflammasome is thought to be critically involved in AD. Increased activation of this inflammasome in African Americans is consistent with the current results.
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Affiliation(s)
- Sherry A Ferguson
- Division of Neurotoxicology, National Center for Toxicological Research/Food and Drug Administration, 3900 NCTR Road, Jefferson, AR, 72079, USA.
| | - Vijayalakshmi Varma
- Division of Systems Biology, National Center for Toxicological Research/Food and Drug Administration, Jefferson, AR, 72079, USA
| | - Daniel Sloper
- Division of Systems Biology, National Center for Toxicological Research/Food and Drug Administration, Jefferson, AR, 72079, USA
| | - John J Panos
- Division of Neurotoxicology, National Center for Toxicological Research/Food and Drug Administration, 3900 NCTR Road, Jefferson, AR, 72079, USA
| | - Sumit Sarkar
- Division of Neurotoxicology, National Center for Toxicological Research/Food and Drug Administration, 3900 NCTR Road, Jefferson, AR, 72079, USA
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120
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Wang F, Mo Z. NLRP3 inflammasome in metabolic syndrome. BRAZ J PHARM SCI 2020. [DOI: 10.1590/s2175-97902020000118968] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Affiliation(s)
- Fang Wang
- Central South University, People’s Republic of China
| | - Zhaohui Mo
- Central South University, People’s Republic of China
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121
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Huang D, Chen M, Wang Z, Hou L, Yu W. Electroacupuncture Pretreatment Attenuates Inflammatory Lung Injury After Cardiopulmonary Bypass by Suppressing NLRP3 Inflammasome Activation in Rats. Inflammation 2019; 42:895-903. [PMID: 30680695 DOI: 10.1007/s10753-018-0944-y] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Cardiopulmonary bypass (CPB) can induce inflammatory lung injury, which is a common complication during cardiac surgery. Nod-like receptor family, pyrin domain-containing 3 (NLRP3) inflammasome-induced inflammation plays a crucial role in lung injury after CPB. Previous studies have shown that electroacupuncture (EA) has potential anti-inflammatory activity. However, the role of EA in CPB is poorly understood. The aim of this study was to determine whether EA was associated with CPB-induced inflammatory lung injury. In the present study, rats were treated with EA for 5 days before CPB. Two hours after CPB, the lung tissue, serum, and bronchoalveolar lavage fluid (BALF) were prepared for assessment. Our results showed that the expression of NLRP3 in the lung tissue increased significantly after CPB. The EA pretreatment suppressed NLRP3 inflammasome activation, reduced lung edema, and inhibited IL-1β release into the serum and BALF after CPB. Our findings suggest that EA pretreatment attenuates inflammatory lung injury after CPB by suppressing NLRP3 inflammasome activation.
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Affiliation(s)
- Dongxiao Huang
- The Third Affiliated Hospital of Soochow University, No.185 Juqian Street, Changzhou, Jiangsu, China.,Department of Anesthesiology, Wuxi People's Hospital, No.299 Qingyang Road, Wuxi, Jiangsu, China
| | - Mo Chen
- The Third Affiliated Hospital of Soochow University, No.185 Juqian Street, Changzhou, Jiangsu, China
| | - Zhankui Wang
- Department of Orthopedics, The First Clinical Medical College, Shaanxi University of Chinese Medicine, Xianyang, Shaanxi, China
| | - Lei Hou
- Department of Anesthesiology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, No.160 Pudian Road, Shanghai, China
| | - Weifeng Yu
- Department of Anesthesiology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, No.160 Pudian Road, Shanghai, China. .,Department of Anesthesiology, Shanghai Eastern Hepatobiliary Surgery Hospital, Second Military Medical University, No.225 Changhai Road, Shanghai, 200438, People's Republic of China.
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122
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Zou Y, Cui B, Liang P, Tian X, Ma Y, Zhao S. Inhibition of NLRP3 Protects Human Lens Epithelial Cells against Oxidative Stress-Induced Apoptosis by NF-κB Signaling. Ophthalmic Res 2019; 63:174-181. [PMID: 31805556 DOI: 10.1159/000504303] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2019] [Accepted: 10/22/2019] [Indexed: 11/19/2022]
Abstract
BACKGROUNDS/AIMS To explore whether NLRP3 is involved in the development of cataract and to study the effect of NLRP3 on hydrogen peroxide (H2O2)-induced injury in human lens epithelial cells. METHODS Oxidative stress-induced apoptosis model was constructed by treating HLEB3 cells with 50 µM H2O2 at different times (6 h, 12 h) and was confirmed by flow cytometry and Western blot. HLEB3 were divided into NC, NC+H2O2, shNLRP3, and shNLRP3+H2O2 groups. Quantitative real-time polymerase chain reaction and Western blot were employed to detect mRNA and protein expressions, DCFH-DA to measure reactive oxygen species production, and Annexin V-FITC/PI staining to determine cell apoptosis. RESULTS NLRP3 expression significantly increased in H2O2-induced HLEB3 cells. shRNA interference of NLRP3 inflammasome protects HLEB3 cells against oxidative stress-induced apoptosis by decreasing the expression levels of caspase-3 and Bax and increasing Bcl-2 expression. shNLRP3 was able to effectively suppress H2O2-induced apoptosis via inhibition of NF-κB signaling. CONCLUSION NLRP3 might be involved in the apoptosis of lens epithelial cells. The inhibition of NLRP3 obviously attenuated H2O2-induced oxidative stress injury of human lens epithelial cells via NF-κB signaling.
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Affiliation(s)
- Yuanyuan Zou
- The Second Department of Ophthalmology, Cangzhou Central Hospital, Cangzhou, China,
| | - Bingjie Cui
- The Second Department of Ophthalmology, Cangzhou Central Hospital, Cangzhou, China
| | - Pei Liang
- The Second Department of Ophthalmology, Cangzhou Central Hospital, Cangzhou, China
| | - Xiaoyu Tian
- The Second Department of Ophthalmology, Cangzhou Central Hospital, Cangzhou, China
| | - Yiming Ma
- The Second Department of Ophthalmology, Cangzhou Central Hospital, Cangzhou, China
| | - Shaozhen Zhao
- Department of Refraction and Cornea, Eye Institute and School of Optometry, Tianjin Medical University Eye Hospital, Tianjin, China
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Liu Z, Tan K, Bu L, Bo L, Ni W, Fei M, Chen F, Deng X, Li J. Tim4 regulates NALP3 inflammasome expression and activity during monocyte/macrophage dysfunction in septic shock patients. Burns 2019; 46:652-662. [PMID: 31676250 DOI: 10.1016/j.burns.2019.08.016] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2019] [Revised: 08/28/2019] [Accepted: 08/29/2019] [Indexed: 10/25/2022]
Abstract
Sepsis is the leading cause of death in burn patients. Monocytes/macrophages rapidly exhibit impaired production of proinflammatory cytokines and an elevated generation of anti-inflammatory cytokines in septic patients with immunosuppression. However, the expression patterns of Tim4 and Nod-like receptor protein 3 (NALP3) inflammasome and their roles during immunosuppression in septic shock patients are not well understood. Tim4 and NALP3 inflammasome expression in monocytes were downregulated in immunosuppressive patients with sepsis compared with healthy volunteers. Meanwhile, NALP3 inflammasome expression was upregulated by Tim4 overexpression in murine bone marrow-derived macrophages (BMDMs) and J774A.1 macrophages. Tim4 overexpression improved the ability of BMDMs and J774A.1 macrophages to produce proinflammatory cytokines and increased the expression of cleaved-caspase-1 (p10) after LPS/ATP stimulation. In addition, overexpression of Tim4 enhanced phagocytosis of apoptotic polymorphonuclear neutrophils (PMNs) by BMDMs and J774A.1 macrophages, while depletion of NALP3 in Tim4 overexpressing BMDMs and J774A.1 macrophages decreased phagocytosis of apoptotic PMNs. In summary, the expression of Tim4 and NALP3 inflammasome in monocytes/macrophages was downregulated in septic shock patients, and diminished expression of Tim4 and NALP3 inflammasome in monocytes/macrophages might play a critical role in sepsis-elicited immunosuppression.
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Affiliation(s)
- Zheng Liu
- Faculty of Anesthesiology, Changhai Hospital, Second Military Medical University, 200433, Shanghai, China
| | - Kezhe Tan
- Faculty of Anesthesiology, Changhai Hospital, Second Military Medical University, 200433, Shanghai, China
| | - Lan Bu
- Faculty of Anesthesiology, Changhai Hospital, Second Military Medical University, 200433, Shanghai, China
| | - Lulong Bo
- Faculty of Anesthesiology, Changhai Hospital, Second Military Medical University, 200433, Shanghai, China
| | - Wen Ni
- Faculty of Anesthesiology, Changhai Hospital, Second Military Medical University, 200433, Shanghai, China
| | - Miaomiao Fei
- Faculty of Anesthesiology, Changhai Hospital, Second Military Medical University, 200433, Shanghai, China
| | - Fang Chen
- Faculty of Anesthesiology, Changhai Hospital, Second Military Medical University, 200433, Shanghai, China
| | - Xiaoming Deng
- Faculty of Anesthesiology, Changhai Hospital, Second Military Medical University, 200433, Shanghai, China.
| | - Jinbao Li
- Department of Anesthesiology, Shanghai First People's Hospital, Jiaotong University, 200081, Shanghai, China.
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Sánchez-Fernández A, Skouras DB, Dinarello CA, López-Vales R. OLT1177 (Dapansutrile), a Selective NLRP3 Inflammasome Inhibitor, Ameliorates Experimental Autoimmune Encephalomyelitis Pathogenesis. Front Immunol 2019; 10:2578. [PMID: 31736980 PMCID: PMC6839275 DOI: 10.3389/fimmu.2019.02578] [Citation(s) in RCA: 69] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2019] [Accepted: 10/17/2019] [Indexed: 01/05/2023] Open
Abstract
IL-1β and IL-18 are pro-inflammatory cytokines that are linked to inflammation. Activation of the NOD-like receptor protein 3 (NLRP3) inflammasome is involved in the maturation and secretion of IL-1β and IL-18 and, thus, plays a key role in the pathogenesis of many inflammatory conditions, including multiple sclerosis (MS). OLT1177™ (Dapansutrile) is a newly developed drug that is safe in humans and inhibits specifically the NLRP3 inflammasome. In the present study, we investigated whether OLT1177 exerts therapeutic effects in experimental autoimmune encephalomyelitis (EAE), a mouse model of MS. We found that EAE mice fed an OLT1177-enriched diet prophylactically were significantly protected against functional deficits and demyelination in the spinal cord. We also demonstrated that prophylactic oral administration of OLT1177 led to marked reduction (~2- to 3-fold) in the protein levels of IL-1β and IL-18, as well as, IL-6 and TNFα, in the spinal cord of EAE mice. Moreover, prophylactic oral administration of OLT1177 significantly attenuated the infiltration of CD4 T cells and macrophages in the spinal cord. We also demonstrated that oral administration of OLT1177, starting at disease onset, resulted in significant amelioration of the clinical signs of EAE. Overall, these first data suggest that OLT1177 could have clinical benefit for the treatment of MS in humans.
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Affiliation(s)
- Alba Sánchez-Fernández
- Institut de Neurociencies and Departament de Biologia Cellular, Fisiologia i Immunologia, Universitat Autonoma de Barcelona, Bellaterra, Spain.,Centro de Investigación Biomédica en Red de Enfermedades Neurodegenerativas, Madrid, Spain
| | | | - Charles A Dinarello
- Department of Medicine, University of Colorado Denver, Aurora, CO, United States.,Department of Medicine, Radboud University Medical Center, Nijmegen, Netherlands
| | - Rubèn López-Vales
- Institut de Neurociencies and Departament de Biologia Cellular, Fisiologia i Immunologia, Universitat Autonoma de Barcelona, Bellaterra, Spain.,Centro de Investigación Biomédica en Red de Enfermedades Neurodegenerativas, Madrid, Spain
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125
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Dhar R, Zhang L, Li Y, Rana MN, Hu Z, Li Z, Cui H, Tang H. Electroacupuncture ameliorates cardiopulmonary bypass induced apoptosis in lung via ROS/Nrf2/NLRP3 inflammasome pathway. Life Sci 2019; 238:116962. [PMID: 31628913 DOI: 10.1016/j.lfs.2019.116962] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2019] [Revised: 10/04/2019] [Accepted: 10/12/2019] [Indexed: 02/06/2023]
Abstract
AIMS Electroacupuncture (EAc) has a pulmonary protective effect during cardiopulmonary bypass (CPB), but its molecular mechanisms including inflammasome activation signaling pathways remains unclear. MATERIALS AND METHODS Male Sprague Dawley rats were divided into control, CPB + EAc and CPB groups. Lung injury model was developed by CPB treatment and EAc (2/100 Hz) was carried out before CPB in the CPB + EAc group. Lung tissues were collected at two time points (0.5 h; 2 h) to determine cytokines release by ELISA kits, and protein expressions by Western blot. Serum collected at two time points (0.5 h; 2 h) from CPB and CPB + EAc treated groups were used in NR8383 cells to confirm the effect of EAc. KEY FINDINGS CPB significantly increased the inflammatory mediators, histological damage and expression of inflammasome related protein and apoptosis, when compared with control group. The level of tumor necrosis factor-α(TNF-α), interleukin (IL)-18 and IL-1β in the CPB + EAc treated group was significantly decreased along with histological changes compared to CPB. Moreover, EAc inhibited the activation of Nod like receptor protein-3 (NLRP3) inflammasome complex, caspase-8 and activated NF-E2-related factor 2 (p-Nrf2). In addition, serum from the CPB + EAc group prevented CPB induced activation of inflammasome and related mediators, reducing ROS generation and apoptosis in NR8383 macrophages. SIGNIFICANCE These findings indicate that EAc had a critical anti-apoptotic role by suppression of ROS/Nrf2/NLRP3 inflammasome pathway. EAc might be a possible therapeutic treatment for CPB-induced acute lung injury.
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Affiliation(s)
- Rana Dhar
- Department of Pharmacology, School of Basic Medical Sciences, Zhejiang University, Hangzhou, 310058, China
| | - Lejun Zhang
- Department of Pharmacology, School of Basic Medical Sciences, Zhejiang University, Hangzhou, 310058, China
| | - Yajun Li
- Department of Pharmacology, School of Basic Medical Sciences, Zhejiang University, Hangzhou, 310058, China
| | - Mohammad Nasiruddin Rana
- Department of Pharmacology, School of Basic Medical Sciences, Zhejiang University, Hangzhou, 310058, China
| | - Zhengqiang Hu
- Department of Pharmacology, School of Basic Medical Sciences, Zhejiang University, Hangzhou, 310058, China
| | - Zigang Li
- Department of Anesthesiology, Women's Hospital, School of Medicine, Zhejiang University, Hangzhou, 310003, China
| | - Huashun Cui
- Department of Acupuncture, Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai, China.
| | - Huifang Tang
- Department of Pharmacology, School of Basic Medical Sciences, Zhejiang University, Hangzhou, 310058, China.
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126
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Dai J, Chen H, Chai Y. Advanced Glycation End Products (AGEs) Induce Apoptosis of Fibroblasts by Activation of NLRP3 Inflammasome via Reactive Oxygen Species (ROS) Signaling Pathway. Med Sci Monit 2019; 25:7499-7508. [PMID: 31587010 PMCID: PMC6792499 DOI: 10.12659/msm.915806] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Background Type 2 diabetes impairs the healing process and induces apoptosis of fibroblasts, which are thought to be involved in this process. We investigated the possible mechanisms involved in AGEs-induced apoptosis of human dermal fibroblasts. Material/Methods We examined the expression of apoptosis-related proteins in fibroblasts isolated from human diabetic wounds. Human dermal fibroblasts exposed to AGEs were used to study the links among apoptosis, ROS, and NLRP3 inflammasome activation. Signaling mechanisms were evaluated by preincubating the cells with appropriate inhibitors. Cleaved caspase-8, cleaved caspase-3, BAX, Bcl-2, and NLRP3 inflammasome expression were measured by Western blot analysis. ROS generation, cell viability, and cell apoptosis were assessed. Results We observed a higher level of cleaved caspase-8 and cleaved caspase-3 expression in fibroblasts isolated from human diabetic wounds compared with controls. AGEs decreased the proliferation of cells in a concentration-dependent and time-dependent manner. The exposure of fibroblasts to AGEs significantly increased the number of cells in early and late apoptosis stages. AGES-induced human dermal fibroblasts showed high expressions of cleaved caspase3, cleaved caspase8, and Bax. Treatment with AGEs induced the expression of NLRP3, caspase-1, and ASC. AGES-induced apoptosis was blocked by BAY 11–7082, an inhibitor of the NLRP3 inflammasome. AGEs increased the production of ROS in fibroblasts, and its apoptogenic effect was blocked by NAC. Conclusions AGEs cause apoptosis of fibroblasts by inducing the generation of ROS and activating the NLRP3 inflammasome. In vivo experiments are needed to confirm these results.
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Affiliation(s)
- Jiezhi Dai
- Department of Orthopedic Surgery, Shanghai Sixth People's Hospital, JiaoTong University, Shanghai, China (mainland)
| | - Hua Chen
- Department of Orthopedic Surgery, Shanghai Sixth People's Hospital, JiaoTong University, Shanghai, China (mainland)
| | - Yimin Chai
- Department of Orthopedic Surgery, Shanghai Sixth People's Hospital, JiaoTong University, Shanghai, China (mainland)
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127
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Kim SK, Choe JY, Park KY. Anti-inflammatory effect of artemisinin on uric acid-induced NLRP3 inflammasome activation through blocking interaction between NLRP3 and NEK7. Biochem Biophys Res Commun 2019; 517:338-345. [DOI: 10.1016/j.bbrc.2019.07.087] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2019] [Accepted: 07/23/2019] [Indexed: 10/26/2022]
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128
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Kroes MM, Mariman R, Hijdra D, Hamstra HJ, van Boxtel KJWM, van Putten JPM, de Wit J, Pinelli E. Activation of Human NK Cells by Bordetella pertussis Requires Inflammasome Activation in Macrophages. Front Immunol 2019; 10:2030. [PMID: 31507615 PMCID: PMC6718514 DOI: 10.3389/fimmu.2019.02030] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2019] [Accepted: 08/12/2019] [Indexed: 12/14/2022] Open
Abstract
Pertussis is a highly contagious respiratory infection caused by the bacterium Bordetella pertussis. Humans are the only known natural reservoir of B. pertussis. In mice, macrophages and NK cells have a key role in confining B. pertussis to the respiratory tract. However, the mechanisms underlying this process, particularly during human infections, remain unclear. Here we characterized the activation of human macrophages and NK cells in response to B. pertussis and unraveled the role of inflammasomes in this process. NLRP3 inflammasome activation by B. pertussis in human macrophage-like THP-1 cells and primary monocyte-derived macrophages (mo-MΦ) was shown by the visualization of ASC-speck formation, pyroptosis, and the secretion of caspase-mediated IL-1β and IL-18. In contrast to macrophages, stimulation of human CD56+CD3− NK cells by B. pertussis alone did not result in activation of these cells. However, co-culture of B. pertussis-stimulated mo-MΦ and autologous NK cells resulted in high amounts of IFNγ secretion and an increased frequency of IL-2Rα+ and HLA-DR+ NK cells, indicating NK cell activation. This activation was significantly reduced upon inhibition of inflammasome activity or blocking of IL-18 in the mo-MΦ/NK cell co-culture. Furthermore, we observed increased secretion of proinflammatory cytokines in the B. pertussis-stimulated mo-MΦ/NK co-culture compared to the mo-MΦ single culture. Our results demonstrate that B. pertussis induces inflammasome activation in human macrophages and that the IL-18 produced by these cells is required for the activation of human NK cells, which in turn enhances the pro-inflammatory response to this pathogen. Our data provides a better understanding of the underlying mechanisms involved in the induction of innate immune responses against B. pertussis. These findings contribute to the knowledge required for the development of improved intervention strategies to control this highly contagious disease.
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Affiliation(s)
- Michiel M Kroes
- Center for Immunology of Infectious Diseases and Vaccines, Center for Infectious Disease Control, National Institute for Public Health and the Environment, Bilthoven, Netherlands.,Department of Infectious Diseases and Immunology, Faculty of Veterinary Medicine, Utrecht University, Utrecht, Netherlands
| | - Rob Mariman
- Center for Immunology of Infectious Diseases and Vaccines, Center for Infectious Disease Control, National Institute for Public Health and the Environment, Bilthoven, Netherlands
| | - Daniëlle Hijdra
- Center for Immunology of Infectious Diseases and Vaccines, Center for Infectious Disease Control, National Institute for Public Health and the Environment, Bilthoven, Netherlands
| | - Hendrik-Jan Hamstra
- Center for Immunology of Infectious Diseases and Vaccines, Center for Infectious Disease Control, National Institute for Public Health and the Environment, Bilthoven, Netherlands
| | - Karlijn J W M van Boxtel
- Center for Immunology of Infectious Diseases and Vaccines, Center for Infectious Disease Control, National Institute for Public Health and the Environment, Bilthoven, Netherlands
| | - Jos P M van Putten
- Department of Infectious Diseases and Immunology, Faculty of Veterinary Medicine, Utrecht University, Utrecht, Netherlands
| | - Jelle de Wit
- Center for Immunology of Infectious Diseases and Vaccines, Center for Infectious Disease Control, National Institute for Public Health and the Environment, Bilthoven, Netherlands
| | - Elena Pinelli
- Center for Immunology of Infectious Diseases and Vaccines, Center for Infectious Disease Control, National Institute for Public Health and the Environment, Bilthoven, Netherlands
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129
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The NLRP3 Inflammasome: An Overview of Mechanisms of Activation and Regulation. Int J Mol Sci 2019; 20:ijms20133328. [PMID: 31284572 PMCID: PMC6651423 DOI: 10.3390/ijms20133328] [Citation(s) in RCA: 1955] [Impact Index Per Article: 391.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Revised: 07/01/2019] [Accepted: 07/03/2019] [Indexed: 02/07/2023] Open
Abstract
The NLRP3 inflammasome is a critical component of the innate immune system that mediates caspase-1 activation and the secretion of proinflammatory cytokines IL-1β/IL-18 in response to microbial infection and cellular damage. However, the aberrant activation of the NLRP3 inflammasome has been linked with several inflammatory disorders, which include cryopyrin-associated periodic syndromes, Alzheimer's disease, diabetes, and atherosclerosis. The NLRP3 inflammasome is activated by diverse stimuli, and multiple molecular and cellular events, including ionic flux, mitochondrial dysfunction, and the production of reactive oxygen species, and lysosomal damage have been shown to trigger its activation. How NLRP3 responds to those signaling events and initiates the assembly of the NLRP3 inflammasome is not fully understood. In this review, we summarize our current understanding of the mechanisms of NLRP3 inflammasome activation by multiple signaling events, and its regulation by post-translational modifications and interacting partners of NLRP3.
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130
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Traven A, Naderer T. Central metabolic interactions of immune cells and microbes: prospects for defeating infections. EMBO Rep 2019; 20:e47995. [PMID: 31267653 PMCID: PMC6607010 DOI: 10.15252/embr.201947995] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2019] [Revised: 04/22/2019] [Accepted: 05/27/2019] [Indexed: 12/16/2022] Open
Abstract
Antimicrobial drug resistance is threatening to take us to the "pre-antibiotic era", where people are dying from preventable and treatable diseases and the risk of hospital-associated infections compromises the success of surgery and cancer treatments. Development of new antibiotics is slow, and alternative approaches to control infections have emerged based on insights into metabolic pathways in host-microbe interactions. Central carbon metabolism of immune cells is pivotal in mounting an effective response to invading pathogens, not only to meet energy requirements, but to directly activate antimicrobial responses. Microbes are not passive players here-they remodel their metabolism to survive and grow in host environments. Sometimes, microbes might even benefit from the metabolic reprogramming of immune cells, and pathogens such as Candida albicans, Salmonella Typhimurium and Staphylococcus aureus can compete with activated host cells for sugars that are needed for essential metabolic pathways linked to inflammatory processes. Here, we discuss how metabolic interactions between innate immune cells and microbes determine their survival during infection, and ways in which metabolism could be manipulated as a therapeutic strategy.
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Affiliation(s)
- Ana Traven
- Infection and Immunity Program and the Department of Biochemistry & Molecular BiologyBiomedicine Discovery InstituteMonash UniversityClaytonVic.Australia
| | - Thomas Naderer
- Infection and Immunity Program and the Department of Biochemistry & Molecular BiologyBiomedicine Discovery InstituteMonash UniversityClaytonVic.Australia
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131
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Involvement of the microglial NLRP3 inflammasome in the anti-inflammatory effect of the antidepressant clomipramine. J Affect Disord 2019; 254:15-25. [PMID: 31082627 DOI: 10.1016/j.jad.2019.05.009] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/07/2018] [Revised: 02/25/2019] [Accepted: 05/04/2019] [Indexed: 02/07/2023]
Abstract
BACKGROUND Depression has recently been referred to as a neuroimmune disease because it is characterized by inflammatory changes in the cerebral cortex and hippocampus. Studies have demonstrated that microglial activation plays a crucial role in releasing inflammatory cytokines in the central nervous system (CNS), thereby contributing to depression, the mechanism underlying which remains unclear. METHODS First, we examined microglial activation and inflammatory changes in C57BL/6 male mice injected with lipopolysaccharide (LPS; 1 mg/kg), which leads to depressive behaviors in mice that were attenuated by the antidepressant clomipramine. Second, we utilized a BV2 cell line and primary microglial cultures to determine the inflammatory response in vitro, and the effects of clomipramine exerted on the inflammatory response using real-time polymerase chain reaction and ELISA. Third, we utilized NLRP3 (NOD-like receptor protein 3) knock-out (KO) mice to prove that NLRP3 is involved in the effects of clomipramine. RESULTS The results showed that LPS injection induced depressive-like behaviors in mice, as assessed using several behavioral tests including body weight, and forced swimming and tail suspension tests. The LPS-induced expression of interleukin-1beta (IL-1β), IL-6, and tumor necrosis factor alpha could be downregulated by clomipramine pre-treatment both in vivo and in vitro. The inhibitory effect of clomipramine on the LPS-induced increase in cytokines was found at both the protein and gene levels. Clomipramine significantly reduced the LPS-induced increase in NLRP3 gene expression in BV2 cells. Furthermore, we utilized NLRP3 KO mice to explore whether NLPP3 was involved in this process and found that clomipramine treatment inhibits the LPS-induced increased expression of IL-1β. CONCLUSION These results imply that clomipramine could attenuate depressive behaviors and neuroinflammation induced by LPS via partial regulation of NLRP3.
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132
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Xu S, Li X, Liu Y, Xia Y, Chang R, Zhang C. Inflammasome inhibitors: promising therapeutic approaches against cancer. J Hematol Oncol 2019; 12:64. [PMID: 31242947 PMCID: PMC6595574 DOI: 10.1186/s13045-019-0755-0] [Citation(s) in RCA: 56] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2019] [Accepted: 06/14/2019] [Indexed: 12/21/2022] Open
Abstract
Inflammation has long been accepted as a key component of carcinogenesis. During inflammation, inflammasomes are potent contributors to the activation of inflammatory cytokines that lead to an inflammatory cascade. Considering the contributing role of inflammasomes in cancer progression, inflammasome inhibitors seem to have a promising future in cancer treatment and prevention. Here, we summarize the structures and signaling pathways of inflammasomes and detail some inflammasome inhibitors used to treat various forms of cancer, which we expect to be used in novel anticancer approaches. However, the practical application of inflammasome inhibitors is limited in regard to specific types of cancer, and the associated clinical trials have not yet been completed. Therefore, additional studies are required to explore more innovative and effective medicines for future clinical treatment of cancer.
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Affiliation(s)
- Shengchao Xu
- Department of Thoracic Surgery, Xiangya Hospital of Central South University, Changsha, 410008, Hunan, People's Republic of China
| | - Xizhe Li
- Department of Thoracic Surgery, Xiangya Hospital of Central South University, Changsha, 410008, Hunan, People's Republic of China
| | - Yuanqi Liu
- Department of Thoracic Surgery, Xiangya Hospital of Central South University, Changsha, 410008, Hunan, People's Republic of China
| | - Yu Xia
- Department of Thoracic Surgery, Xiangya Hospital of Central South University, Changsha, 410008, Hunan, People's Republic of China
| | - Ruimin Chang
- Department of Thoracic Surgery, Xiangya Hospital of Central South University, Changsha, 410008, Hunan, People's Republic of China.
| | - Chunfang Zhang
- Department of Thoracic Surgery, Xiangya Hospital of Central South University, Changsha, 410008, Hunan, People's Republic of China.
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Deng G, Chen W, Wang P, Zhan T, Zheng W, Gu Z, Wang X, Ji X, Sun Y. Inhibition of NLRP3 inflammasome-mediated pyroptosis in macrophage by cycloastragenol contributes to amelioration of imiquimod-induced psoriasis-like skin inflammation in mice. Int Immunopharmacol 2019; 74:105682. [PMID: 31203155 DOI: 10.1016/j.intimp.2019.105682] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2019] [Revised: 05/19/2019] [Accepted: 06/03/2019] [Indexed: 12/12/2022]
Abstract
Psoriasis is a common chronic inflammatory skin disease, and the infiltrated macrophages in psoriatic skin lesions play a key role in the progression of this uncontrolled cutaneous inflammation. However, the current therapeutic strategies for patients with psoriasis are not satisfactory. Here, we report that cycloastragenol (CAG), a natural active small compound isolated from Astragalus membranaceus, significantly ameliorated imiquimod (IMQ)-induced psoriasiform dermatitis in mice by targeting proinflammatory macrophages. CAG significantly reduced the clinical scores, decreased the epidermal thickness, and ameliorated the deteriorating histopathology observed in IMQ-induced mice. CAG treatment specifically reduced the dermal infiltration of macrophages, rather than of dendritic cells, neutrophils, or T lymphocytes, into psoriatic skin. CAG dose-dependently decreased the level of proinflammatory cytokines, including IL-1β, TNF-α and IL-6, in murine psoriatic skin and serum, as well as in IMQ-stimulated, bone-marrow-derived macrophages. When compared to the control group, CAG significantly decreased IMQ-triggered NLRP3 inflammasome activation and gasdermin D-mediated cell pyroptosis in these proinflammatory macrophages. CAG also suppressed the assembly of the NLRP3 inflammasome complex. Taken together, the results show that CAG selectively modulates macrophage function by inhibiting NLRP3 inflammasome-mediated pyroptosis to ameliorate IMQ-induced psoriasis-like skin inflammation in mice. Our findings also identify an effective drug candidate for the treatment of psoriasis.
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Affiliation(s)
- Guoliang Deng
- State Key Laboratory of Pharmaceutical Biotechnology, Department of Biotechnology and Pharmaceutical Sciences, School of Life Sciences, Nanjing University, 163 Xianlin Avenue, Nanjing 210023, China
| | - Wenjun Chen
- Affiliated Hospital of Nanjing University of Chinese Medicine, 155 Hanzhong Road, Nanjing 210029, China
| | - Peng Wang
- State Key Laboratory of Pharmaceutical Biotechnology, Department of Biotechnology and Pharmaceutical Sciences, School of Life Sciences, Nanjing University, 163 Xianlin Avenue, Nanjing 210023, China
| | - Tianying Zhan
- School of Medicine, Shenzhen University, 1066 Xueyuan Avenue, Shenzhen 518055, China
| | - Wei Zheng
- State Key Laboratory of Pharmaceutical Biotechnology, Department of Biotechnology and Pharmaceutical Sciences, School of Life Sciences, Nanjing University, 163 Xianlin Avenue, Nanjing 210023, China
| | - Zhengbing Gu
- Jiangsu Yongjian Pharmaceutical Co., Ltd., 1 Yaocheng Avenue, China Medical City, Taizhou 225300, China
| | - Xiaomei Wang
- School of Medicine, Shenzhen University, 1066 Xueyuan Avenue, Shenzhen 518055, China.
| | - Xiaoyun Ji
- State Key Laboratory of Pharmaceutical Biotechnology, Department of Biotechnology and Pharmaceutical Sciences, School of Life Sciences, Nanjing University, 163 Xianlin Avenue, Nanjing 210023, China.
| | - Yang Sun
- State Key Laboratory of Pharmaceutical Biotechnology, Department of Biotechnology and Pharmaceutical Sciences, School of Life Sciences, Nanjing University, 163 Xianlin Avenue, Nanjing 210023, China.
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Gomez-Lopez N, Romero R, Maymon E, Kusanovic JP, Panaitescu B, Miller D, Pacora P, Tarca AL, Motomura K, Erez O, Jung E, Hassan SS, Hsu CD. Clinical chorioamnionitis at term IX: in vivo evidence of intra-amniotic inflammasome activation. J Perinat Med 2019; 47:276-287. [PMID: 30412466 PMCID: PMC6445729 DOI: 10.1515/jpm-2018-0271] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/15/2018] [Accepted: 09/06/2018] [Indexed: 12/20/2022]
Abstract
Background The inflammasome has been implicated in the mechanisms that lead to spontaneous labor at term. However, whether the inflammasome is activated in the amniotic cavity of women with clinical chorioamnionitis at term is unknown. Herein, by measuring extracellular ASC [apoptosis-associated speck-like protein containing a C-terminal caspase recruitment domain (CARD)], we investigated whether there is in vivo inflammasome activation in amniotic fluid of patients with clinical chorioamnionitis at term with sterile intra-amniotic inflammation and in those with intra-amniotic infection. Methods This was a retrospective cross-sectional study that included amniotic fluid samples collected from 76 women who delivered after spontaneous term labor with diagnosed clinical chorioamnionitis. Intra-amniotic inflammation was defined as an elevated amniotic fluid interleukin (IL)-6 concentration ≥2.6 ng/mL, and intra-amniotic infection was diagnosed by the presence of microbial invasion of the amniotic cavity (MIAC) accompanied by intra-amniotic inflammation. Patients were classified into the following groups: (1) women without intra-amniotic inflammation or infection (n=16); (2) women with MIAC but without intra-amniotic inflammation (n=5); (3) women with sterile intra-amniotic inflammation (n=15); and (4) women with intra-amniotic infection (n=40). As a readout of in vivo inflammasome activation, extracellular ASC was measured in amniotic fluid by enzyme-linked immunosorbent assay. Acute inflammatory responses in the amniotic fluid and placenta were also evaluated. Results In clinical chorioamnionitis at term: (1) amniotic fluid concentrations of ASC (extracellular ASC is indicative of in vivo inflammasome activation) and IL-6 were greater in women with intra-amniotic infection than in those without intra-amniotic inflammation, regardless of the presence of MIAC; (2) amniotic fluid concentrations of ASC and IL-6 were also higher in women with sterile intra-amniotic inflammation than in those without intra-amniotic inflammation, regardless of the presence of MIAC; (3) amniotic fluid concentrations of IL-6, but not ASC, were more elevated in women with intra-amniotic infection than in those with sterile intra-amniotic inflammation; (4) a positive and significant correlation was observed between amniotic fluid concentrations of ASC and IL-6; (5) no differences were observed in amniotic fluid ASC and IL-6 concentrations between women with and without MIAC in the absence of intra-amniotic inflammation; (6) women with intra-amniotic infection had elevated white blood cell counts and reduced glucose levels in amniotic fluid compared to the other three study groups; and (7) women with intra-amniotic infection presented higher frequencies of acute maternal and fetal inflammatory responses in the placenta than those with sterile intra-amniotic inflammation. Conclusion The intra-amniotic inflammatory response, either induced by alarmins or microbes, is characterized by the activation of the inflammasome - as evidenced by elevated amniotic fluid concentrations of extracellular ASC - in women with clinical chorioamnionitis at term. These findings provide insight into the intra-amniotic inflammatory response in women with clinical chorioamnionitis at term.
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Affiliation(s)
- Nardhy Gomez-Lopez
- Perinatology Research Branch, Division of Obstetrics and Maternal-Fetal Medicine, Division of Intramural Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, U. S. Department of Health and Human Services, Bethesda, Maryland, and Detroit, Michigan, USA
- Department of Obstetrics and Gynecology, Wayne State University School of Medicine, Detroit, Michigan, USA
- Department of Immunology, Microbiology and Biochemistry, Wayne State University School of Medicine, Detroit, Michigan, USA
| | - Roberto Romero
- Perinatology Research Branch, Division of Obstetrics and Maternal-Fetal Medicine, Division of Intramural Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, U. S. Department of Health and Human Services, Bethesda, Maryland, and Detroit, Michigan, USA
- Department of Obstetrics and Gynecology, University of Michigan, Ann Arbor, Michigan, USA
- Department of Epidemiology and Biostatistics, Michigan State University, East Lansing, Michigan, USA
- Center for Molecular Medicine and Genetics, Wayne State University, Detroit, Michigan, USA
| | - Eli Maymon
- Perinatology Research Branch, Division of Obstetrics and Maternal-Fetal Medicine, Division of Intramural Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, U. S. Department of Health and Human Services, Bethesda, Maryland, and Detroit, Michigan, USA
- Department of Obstetrics and Gynecology, Wayne State University School of Medicine, Detroit, Michigan, USA
| | - Juan-Pedro Kusanovic
- Perinatology Research Branch, Division of Obstetrics and Maternal-Fetal Medicine, Division of Intramural Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, U. S. Department of Health and Human Services, Bethesda, Maryland, and Detroit, Michigan, USA
- Division of Obstetrics and Gynecology, Faculty of Medicine, Pontificia Universidad Católica de Chile, Santiago, Chile
- Center for Research and Innovation in Maternal-Fetal Medicine (CIMAF), Department of Obstetrics and Gynecology, Sótero del Río Hospital, Santiago, Chile
| | - Bogdan Panaitescu
- Perinatology Research Branch, Division of Obstetrics and Maternal-Fetal Medicine, Division of Intramural Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, U. S. Department of Health and Human Services, Bethesda, Maryland, and Detroit, Michigan, USA
- Department of Obstetrics and Gynecology, Wayne State University School of Medicine, Detroit, Michigan, USA
| | - Derek Miller
- Perinatology Research Branch, Division of Obstetrics and Maternal-Fetal Medicine, Division of Intramural Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, U. S. Department of Health and Human Services, Bethesda, Maryland, and Detroit, Michigan, USA
- Department of Obstetrics and Gynecology, Wayne State University School of Medicine, Detroit, Michigan, USA
| | - Percy Pacora
- Perinatology Research Branch, Division of Obstetrics and Maternal-Fetal Medicine, Division of Intramural Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, U. S. Department of Health and Human Services, Bethesda, Maryland, and Detroit, Michigan, USA
- Department of Obstetrics and Gynecology, Wayne State University School of Medicine, Detroit, Michigan, USA
| | - Adi L. Tarca
- Perinatology Research Branch, Division of Obstetrics and Maternal-Fetal Medicine, Division of Intramural Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, U. S. Department of Health and Human Services, Bethesda, Maryland, and Detroit, Michigan, USA
- Department of Obstetrics and Gynecology, Wayne State University School of Medicine, Detroit, Michigan, USA
| | - Kenichiro Motomura
- Perinatology Research Branch, Division of Obstetrics and Maternal-Fetal Medicine, Division of Intramural Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, U. S. Department of Health and Human Services, Bethesda, Maryland, and Detroit, Michigan, USA
- Department of Obstetrics and Gynecology, Wayne State University School of Medicine, Detroit, Michigan, USA
| | - Offer Erez
- Perinatology Research Branch, Division of Obstetrics and Maternal-Fetal Medicine, Division of Intramural Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, U. S. Department of Health and Human Services, Bethesda, Maryland, and Detroit, Michigan, USA
- Department of Obstetrics and Gynecology, Wayne State University School of Medicine, Detroit, Michigan, USA
| | - Eunjung Jung
- Perinatology Research Branch, Division of Obstetrics and Maternal-Fetal Medicine, Division of Intramural Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, U. S. Department of Health and Human Services, Bethesda, Maryland, and Detroit, Michigan, USA
- Department of Obstetrics and Gynecology, Wayne State University School of Medicine, Detroit, Michigan, USA
| | - Sonia S. Hassan
- Perinatology Research Branch, Division of Obstetrics and Maternal-Fetal Medicine, Division of Intramural Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, U. S. Department of Health and Human Services, Bethesda, Maryland, and Detroit, Michigan, USA
- Department of Obstetrics and Gynecology, Wayne State University School of Medicine, Detroit, Michigan, USA
- Department of Physiology, Wayne State University School of Medicine, Detroit, Michigan, USA
| | - Chaur-Dong Hsu
- Department of Obstetrics and Gynecology, Wayne State University School of Medicine, Detroit, Michigan, USA
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135
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Guerra Martinez C. P2X7 receptor in cardiovascular disease: The heart side. Clin Exp Pharmacol Physiol 2019; 46:513-526. [PMID: 30834550 DOI: 10.1111/1440-1681.13079] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2018] [Revised: 02/21/2019] [Accepted: 02/28/2019] [Indexed: 01/10/2023]
Abstract
The P2X7 receptor is a ligand-gated purinergic receptor activated by extracellular ATP. The receptor is highly expressed in immune cells and in the brain, and, upon activation, the P2X7 receptor allows a cation flux, leading to the distinct activation of intracellular signalling pathways as the secretion of pro-inflammatory cytokines, and modulation of cell survival. Through these molecular mechanisms, P2X7 is known to play important roles in physiology and pathophysiology of a wide spectrum of diseases, including cancer, inflammatory diseases, neurological, respiratory and more recently cardiovascular diseases. Recent studies demonstrated that the P2X7 could modulate the assembly of the NLRP3 inflammasome, leading to the secretion of pro-inflammatory factors and worsen the cardiac disease phenotypes. This review discusses the critical molecular function of P2X7 in the modulation of the onset, progression and resolution of cardiovascular diseases and analyses the putative future use of P2X7-based therapies that modulate the IL-1β secretion arm and direct P2X7 antagonists.
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Affiliation(s)
- Camila Guerra Martinez
- Department of Microbial Pathogenesis and Immunology, Texas A&M University, College Station, Texas
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136
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Ren G, Zhang X, Xiao Y, Zhang W, Wang Y, Ma W, Wang X, Song P, Lai L, Chen H, Zhan Y, Zhang J, Yu M, Ge C, Li C, Yin R, Yang X. ABRO1 promotes NLRP3 inflammasome activation through regulation of NLRP3 deubiquitination. EMBO J 2019; 38:embj.2018100376. [PMID: 30787184 DOI: 10.15252/embj.2018100376] [Citation(s) in RCA: 92] [Impact Index Per Article: 18.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2018] [Revised: 01/13/2019] [Accepted: 01/18/2019] [Indexed: 01/15/2023] Open
Abstract
Deubiquitination of NLRP3 has been suggested to contribute to inflammasome activation, but the roles and molecular mechanisms are still unclear. We here demonstrate that ABRO1, a subunit of the BRISC deubiquitinase complex, is necessary for optimal NLRP3-ASC complex formation, ASC oligomerization, caspase-1 activation, and IL-1β and IL-18 production upon treatment with NLRP3 ligands after the priming step, indicating that efficient NLRP3 activation requires ABRO1. Moreover, we report that ABRO1 deficiency results in a remarkable attenuation in the syndrome severity of NLRP3-associated inflammatory diseases, including MSU- and Alum-induced peritonitis and LPS-induced sepsis in mice. Mechanistic studies reveal that LPS priming induces ABRO1 binding to NLRP3 in an S194 phosphorylation-dependent manner, subsequently recruiting the BRISC to remove K63-linked ubiquitin chains of NLRP3 upon stimulation with activators. Furthermore, deficiency of BRCC3, the catalytically active component of BRISC, displays similar phenotypes to ABRO1 knockout mice. Our findings reveal an ABRO1-mediated regulatory signaling system that controls activation of the NLRP3 inflammasome and provide novel potential targets for treating NLRP3-associated inflammatory diseases.
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Affiliation(s)
- Guangming Ren
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Center for Protein Sciences (Beijing), Beijing Institute of Lifeomics, Beijing, China
| | - Xuanyi Zhang
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Center for Protein Sciences (Beijing), Beijing Institute of Lifeomics, Beijing, China
| | - Yang Xiao
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Center for Protein Sciences (Beijing), Beijing Institute of Lifeomics, Beijing, China
| | - Wen Zhang
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Center for Protein Sciences (Beijing), Beijing Institute of Lifeomics, Beijing, China.,Department of Pharmaceutical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin, China
| | - Yu Wang
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Center for Protein Sciences (Beijing), Beijing Institute of Lifeomics, Beijing, China.,An Hui Medical University, Hefei, China
| | - Wenbing Ma
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Center for Protein Sciences (Beijing), Beijing Institute of Lifeomics, Beijing, China
| | - Xiaohan Wang
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Center for Protein Sciences (Beijing), Beijing Institute of Lifeomics, Beijing, China
| | - Pan Song
- Beijing Institute of Radiation Medicine, Beijing, China
| | - Lili Lai
- Beijing Institute of Radiation Medicine, Beijing, China
| | - Hui Chen
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Center for Protein Sciences (Beijing), Beijing Institute of Lifeomics, Beijing, China
| | - Yiqun Zhan
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Center for Protein Sciences (Beijing), Beijing Institute of Lifeomics, Beijing, China
| | - Jianhong Zhang
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Center for Protein Sciences (Beijing), Beijing Institute of Lifeomics, Beijing, China.,Institute for Immunology and School of Medicine, Tsinghua University, Beijing, China
| | - Miao Yu
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Center for Protein Sciences (Beijing), Beijing Institute of Lifeomics, Beijing, China
| | - Changhui Ge
- Beijing Institute of Radiation Medicine, Beijing, China
| | - Changyan Li
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Center for Protein Sciences (Beijing), Beijing Institute of Lifeomics, Beijing, China
| | - Ronghua Yin
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Center for Protein Sciences (Beijing), Beijing Institute of Lifeomics, Beijing, China
| | - Xiaoming Yang
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Center for Protein Sciences (Beijing), Beijing Institute of Lifeomics, Beijing, China .,Department of Pharmaceutical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin, China
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137
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Murakami T, Ruengsinpinya L, Nakamura E, Takahata Y, Hata K, Okae H, Taniguchi S, Takahashi M, Nishimura R. Cutting Edge: G Protein Subunit β 1 Negatively Regulates NLRP3 Inflammasome Activation. THE JOURNAL OF IMMUNOLOGY 2019; 202:1942-1947. [PMID: 30777924 DOI: 10.4049/jimmunol.1801388] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2018] [Accepted: 01/30/2019] [Indexed: 02/06/2023]
Abstract
The NLRP3 inflammasome has important roles in the pathogenesis of various inflammatory diseases. However, the regulatory mechanisms of the NLRP3 inflammasome are not fully understood. In this study, we attempted to identify molecules that interact with NLRP3 upon its activation. We identified G protein subunit β 1 (GNB1), a downstream molecule of G protein-coupled receptors (GPCRs), which regulates the NLRP3 inflammasome activation. GNB1 was physically associated with NLRP3 via the pyrin domain of NLRP3. Activation of the NLRP3 inflammasome was enhanced in GNB1-knockdown or GNB1-deficient murine macrophages, although a lack of GNB1 did not affect activation of the AIM2 inflammasome. ASC oligomerization induced by NLRP3 was enhanced by GNB1 deficiency. Conversely, NLRP3-dependent ASC oligomerization was inhibited by the overexpression of GNB1. This study indicates that GNB1 negatively regulates NLRP3 inflammasome activation by suppressing NLRP3-dependent ASC oligomerization, and it provides a regulatory mechanism of the NLRP3 inflammasome.
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Affiliation(s)
- Tomohiko Murakami
- Department of Molecular and Cellular Biochemistry, Osaka University Graduate School of Dentistry, Osaka 565-0871, Japan;
| | - Lerdluck Ruengsinpinya
- Department of Molecular and Cellular Biochemistry, Osaka University Graduate School of Dentistry, Osaka 565-0871, Japan
| | - Eriko Nakamura
- Department of Molecular and Cellular Biochemistry, Osaka University Graduate School of Dentistry, Osaka 565-0871, Japan
| | - Yoshifumi Takahata
- Department of Molecular and Cellular Biochemistry, Osaka University Graduate School of Dentistry, Osaka 565-0871, Japan
| | - Kenji Hata
- Department of Molecular and Cellular Biochemistry, Osaka University Graduate School of Dentistry, Osaka 565-0871, Japan
| | - Hiroaki Okae
- Department of Informative Genetics, Environment and Genome Research Center, Tohoku University Graduate School of Medicine, Sendai 980-8575, Japan
| | - Shun'ichiro Taniguchi
- Department of Comprehensive Cancer Therapy, Shinshu University School of Medicine, Nagano 390-8621, Japan; and
| | - Masafumi Takahashi
- Division of Inflammation Research, Center for Molecular Medicine, Jichi Medical University, Tochigi 329-0498, Japan
| | - Riko Nishimura
- Department of Molecular and Cellular Biochemistry, Osaka University Graduate School of Dentistry, Osaka 565-0871, Japan
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138
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Nagar A, DeMarco RA, Harton JA. Inflammasome and Caspase-1 Activity Characterization and Evaluation: An Imaging Flow Cytometer-Based Detection and Assessment of Inflammasome Specks and Caspase-1 Activation. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2019; 202:1003-1015. [PMID: 30598512 PMCID: PMC6344238 DOI: 10.4049/jimmunol.1800973] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/11/2018] [Accepted: 11/20/2018] [Indexed: 01/12/2023]
Abstract
Inflammasome dysregulation is a hallmark of various inflammatory diseases. Evaluating inflammasome-associated structures (ASC specks) and caspase-1 activity by microscopy is time consuming and limited by small sample size. The current flow cytometric method, time of flight inflammasome evaluation (TOFIE), cannot visualize ASC specks or caspase-1 activity, making colocalization studies of inflammasome components and enzymatic activity impossible. We describe a rapid, high-throughput, single-cell, fluorescence-based image analysis method utilizing the Amnis ImageStreamX instrument that quantitatively and qualitatively characterizes the frequency, area, and cellular distribution of ASC specks and caspase-1 activity in mouse and human cells. Unlike TOFIE, this method differentiates between singular perinuclear specks and false positives. With our technique we also show that the presence of NLRP3 reduces the size of ASC specks, which is further reduced by the presence of active caspase-1. The capacity of our approach to simultaneously detect and quantify ASC specks and caspase-1 activity, both at the population and single-cell level, renders it the most powerful tool available for visualizing and quantifying the impact of mutations on inflammasome assembly and activity.
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Affiliation(s)
- Abhinit Nagar
- Department of Immunology and Microbial Disease, Albany Medical College, Albany, NY 12208; and
| | | | - Jonathan A Harton
- Department of Immunology and Microbial Disease, Albany Medical College, Albany, NY 12208; and
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139
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Langgartner D, Lowry CA, Reber SO. Old Friends, immunoregulation, and stress resilience. Pflugers Arch 2019; 471:237-269. [PMID: 30386921 PMCID: PMC6334733 DOI: 10.1007/s00424-018-2228-7] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2018] [Revised: 10/03/2018] [Accepted: 10/22/2018] [Indexed: 02/07/2023]
Abstract
There is a considerable body of evidence indicating that chronic adverse experience, especially chronic psychosocial stress/trauma, represents a major risk factor for the development of many somatic and affective disorders, including inflammatory bowel disease (IBD) and posttraumatic stress disorder (PTSD). However, the mechanisms underlying the development of chronic stress-associated disorders are still in large part unknown, and current treatment and prevention strategies lack efficacy and reliability. A greater understanding of mechanisms involved in the development and persistence of chronic stress-induced disorders may lead to novel approaches to prevention and treatment of these disorders. In this review, we provide evidence indicating that increases in immune (re-)activity and inflammation, potentially promoted by a reduced exposure to immunoregulatory microorganisms ("Old Friends") in today's modern society, may be causal factors in mediating the vulnerability to development and persistence of stress-related pathologies. Moreover, we discuss strategies to increase immunoregulatory processes and attenuate inflammation, as for instance contact with immunoregulatory Old Friends, which appears to be a promising strategy to promote stress resilience and to prevent/treat chronic stress-related disorders.
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Affiliation(s)
- Dominik Langgartner
- Laboratory for Molecular Psychosomatics, Department of Psychosomatic Medicine and Psychotherapy, University Ulm, Albert-Einstein-Allee 23, 89081, Ulm, Germany
| | - Christopher A Lowry
- Department of Integrative Physiology and Center for Neuroscience, University of Colorado Boulder, Boulder, CO, 80309, USA
- Department of Physical Medicine & Rehabilitation and Center for Neuroscience, University of Colorado Anschutz Medical Campus, Aurora, CO, 80045, USA
- Veterans Health Administration, Rocky Mountain Mental Illness Research Education and Clinical Center (MIRECC), Denver Veterans Affairs Medical Center (VAMC), Denver, CO, 80220, USA
- Military and Veteran Microbiome Consortium for Research and Education (MVM-CoRE), Denver, CO, 80220, USA
| | - Stefan O Reber
- Laboratory for Molecular Psychosomatics, Department of Psychosomatic Medicine and Psychotherapy, University Ulm, Albert-Einstein-Allee 23, 89081, Ulm, Germany.
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140
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Alberts BM, Bruce C, Basnayake K, Ghezzi P, Davies KA, Mullen LM. Secretion of IL-1β From Monocytes in Gout Is Redox Independent. Front Immunol 2019; 10:70. [PMID: 30761138 PMCID: PMC6361747 DOI: 10.3389/fimmu.2019.00070] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2018] [Accepted: 01/11/2019] [Indexed: 12/16/2022] Open
Abstract
The pro-inflammatory cytokine interleukin-1β (IL-1β) plays important roles in immunity but is also implicated in autoimmune disease. The most well-established mechanism of IL-1β secretion is via activation of the NOD-like receptor family pyrin domain containing-3 (NLRP3) inflammasome which requires an initial priming signal followed by an activating signal. However, the precise mechanism by which the inflammasome is activated remains unclear. The role of reactive oxygen species (ROS) in this process is contradictory, with some studies suggesting that ROS are crucial while others describe opposite effects. In this study, we evaluated the effects of oxidative stress on IL-1β secretion. Gout is a disease driven solely by IL-1β secretion in response to monosodium urate (MSU) crystals which form during periods of hyperuricemia and thus presents an opportunity to study factors contributing to IL-1β secretion. Sera and monocytes were isolated from patients with gout to determine whether differences in antioxidant status could explain the susceptibility of these individuals to gout attacks. In addition, sera and monocytes were collected from patients with chronic kidney disease (CKD) for comparison as this condition is associated with high levels of oxidative stress and disturbances in serum uric acid levels. There were differences in some aspects of antioxidant defenses in gout patients and these were mainly due to higher serum uric acid. Monocytes from gout patients were more responsive to priming, but not activation, of the NLRP3 inflammasome. However, expression of the components of the NLRP3 inflammasome were unaffected by priming or activation of the inflammasome, nor were these expression levels differentially regulated in gout patients. Inhibition of ROS by N-Acetyl Cysteine inhibited TLR2-induced priming of the NLRP3 inflammasome, but had no effect on MSU-induced activation. Together these findings demonstrate that oxidative stress only affects priming of the NLRP3 inflammasome but does not influence activation.
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Affiliation(s)
- Ben M Alberts
- Clinical and Experimental Medicine, Brighton and Sussex Medical School, Brighton, United Kingdom
| | - Connor Bruce
- Clinical and Experimental Medicine, Brighton and Sussex Medical School, Brighton, United Kingdom
| | - Kolitha Basnayake
- Sussex Kidney Unit, Royal Sussex County Hospital, Brighton, United Kingdom
| | - Pietro Ghezzi
- Clinical and Experimental Medicine, Brighton and Sussex Medical School, Brighton, United Kingdom
| | - Kevin A Davies
- Clinical and Experimental Medicine, Brighton and Sussex Medical School, Brighton, United Kingdom
| | - Lisa M Mullen
- Clinical and Experimental Medicine, Brighton and Sussex Medical School, Brighton, United Kingdom
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141
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Paul HA, Collins KH, Nicolucci AC, Urbanski SJ, Hart DA, Vogel HJ, Reimer RA. Maternal prebiotic supplementation reduces fatty liver development in offspring through altered microbial and metabolomic profiles in rats. FASEB J 2019; 33:5153-5167. [PMID: 30629464 DOI: 10.1096/fj.201801551r] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
A maternal high-fat/sucrose diet, in the presence of maternal obesity, can program increased susceptibility to obesity and metabolic disease in offspring. In particular, nonalcoholic fatty liver disease risk is associated with poor maternal nutrition and obesity status, which may manifest via alterations in gut microbiota. Here, we report that in a preclinical model of diet-induced maternal obesity, maternal supplementation of a high-fat/sucrose diet with the prebiotic oligofructose improves glucose tolerance, insulin sensitivity, and hepatic steatosis in offspring following a long-term high-fat/sucrose dietary challenge compared with offspring of untreated dams. These improvements are associated with alterations in gut microbial composition and serum inflammatory profiles in early life and improvements in inflammatory and fatty-acid gene expression profiles in tissues. Serum metabolomics analysis highlights potential metabolic links between the gut microbiota and the degree of steatosis, including alterations in 1-carbon metabolism. Overall, our data suggest that maternal prebiotic intake protects offspring against hepatic steatosis and insulin resistance following 21 wk of high fat/sucrose diet, which is in part due to alterations in gut microbiota.-Paul, H. A., Collins, K. H., Nicolucci, A. C., Urbanski, S. J., Hart, D. A., Vogel, H. J., Reimer, R. A. Maternal prebiotic supplementation reduces fatty liver development in offspring through altered microbial and metabolomic profiles in rats.
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Affiliation(s)
- Heather A Paul
- Department of Biochemistry and Molecular Biology, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Kelsey H Collins
- Faculty of Kinesiology, University of Calgary, Calgary, Alberta, Canada
| | | | - Stefan J Urbanski
- Department of Pathology and Laboratory Medicine, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - David A Hart
- Faculty of Kinesiology, University of Calgary, Calgary, Alberta, Canada.,McCaig Institute for Bone and Joint Health, University of Calgary, Calgary, Alberta, Canada; and
| | - Hans J Vogel
- Department of Biochemistry and Molecular Biology, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada.,Department of Biological Sciences, Bio-Nuclear Magnetic Resonance (NMR) Center, University of Calgary, Calgary, Alberta, Canada
| | - Raylene A Reimer
- Department of Biochemistry and Molecular Biology, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada.,Faculty of Kinesiology, University of Calgary, Calgary, Alberta, Canada
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142
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Frank D, Vince JE. Pyroptosis versus necroptosis: similarities, differences, and crosstalk. Cell Death Differ 2019; 26:99-114. [PMID: 30341423 PMCID: PMC6294779 DOI: 10.1038/s41418-018-0212-6] [Citation(s) in RCA: 655] [Impact Index Per Article: 131.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2018] [Revised: 08/17/2018] [Accepted: 09/20/2018] [Indexed: 02/07/2023] Open
Abstract
Pyroptosis and necroptosis represent two pathways of genetically encoded necrotic cell death. Although these cell death programmes can protect the host against microbial pathogens, their dysregulation has been implicated in a variety of autoimmune and auto-inflammatory conditions. The disease-promoting potential of necroptosis and pyroptosis is likely a consequence of their ability to induce a lytic cell death. This cell suicide mechanism, distinct from apoptosis, allows the release of immunogenic cellular content, including damage-associated molecular patterns (DAMPs), and inflammatory cytokines such as interleukin-1β (IL-1β), to trigger inflammation. In this Review, we discuss recent discoveries that have advanced our understanding on the primary functions of pyroptosis and necroptosis, including evidence for the specific cytokines and DAMPs responsible for driving inflammation. We compare the similar and unique aspects of pyroptotic- and necroptotic-induced membrane damage, and explore how these may functionally impact distinct intracellular organelles and signalling pathways. We also examine studies highlighting the crosstalk that can occur between necroptosis and pyroptosis signalling, and evidence supporting the physiological significance of this convergence. Ultimately, a better understanding of the similarities, unique aspects and crosstalk of pyroptosis and necroptosis will inform as to how these cell death pathways might be manipulated for therapeutic benefit.
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Affiliation(s)
- Daniel Frank
- The Walter and Eliza Hall Institute of Medical Research, 1G Royal Parade, Melbourne, VIC, 3052, Australia
- Department of Medical Biology, The University of Melbourne, Parkville, VIC, 3050, Australia
| | - James E Vince
- The Walter and Eliza Hall Institute of Medical Research, 1G Royal Parade, Melbourne, VIC, 3052, Australia.
- Department of Medical Biology, The University of Melbourne, Parkville, VIC, 3050, Australia.
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143
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Avolio E, Fazzari G, Zizza M, De Lorenzo A, Di Renzo L, Alò R, Facciolo RM, Canonaco M. Probiotics modify body weight together with anxiety states via pro-inflammatory factors in HFD-treated Syrian golden hamster. Behav Brain Res 2019; 356:390-399. [DOI: 10.1016/j.bbr.2018.09.010] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2018] [Revised: 09/12/2018] [Accepted: 09/12/2018] [Indexed: 12/17/2022]
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144
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Yabal M, Calleja DJ, Simpson DS, Lawlor KE. Stressing out the mitochondria: Mechanistic insights into NLRP3 inflammasome activation. J Leukoc Biol 2018; 105:377-399. [PMID: 30589456 DOI: 10.1002/jlb.mr0318-124r] [Citation(s) in RCA: 67] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2018] [Revised: 10/23/2018] [Accepted: 10/24/2018] [Indexed: 12/13/2022] Open
Abstract
Inflammasomes are multimeric protein complexes that induce the cleavage and release of bioactive IL-1β and cause a lytic form of cell death, termed pyroptosis. Due to its diverse triggers, ranging from infectious pathogens and host danger molecules to environmental irritants, the NOD-like receptor protein 3 (NLRP3) inflammasome remains the most widely studied inflammasome to date. Despite intense scrutiny, a universal mechanism for its activation remains elusive, although, recent research has focused on mitochondrial dysfunction or potassium (K+ ) efflux as key events. In this review, we give a general overview of NLRP3 inflammasome activation and explore the recently emerging noncanonical and alternative pathways to NLRP3 activation. We highlight the role of the NLRP3 inflammasome in the pathogenesis of metabolic disease that is associated with mitochondrial and oxidative stress. Finally, we interrogate the mechanisms proposed to trigger NLRP3 inflammasome assembly and activation. A greater understanding of how NLRP3 inflammasome activation is triggered may reveal new therapeutic targets for the treatment of inflammatory disease.
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Affiliation(s)
- Monica Yabal
- III. Medical Department for Hematology and Oncology, Kinikum rechts der Isar, Technische Universität München, Munich, Germany
| | - Dale J Calleja
- The Walter and Eliza Hall Institute of Medical Research, Parkville, Victoria, Australia
| | - Daniel S Simpson
- The Walter and Eliza Hall Institute of Medical Research, Parkville, Victoria, Australia.,Department of Medical Biology, University of Melbourne, Parkville, Victoria, Australia
| | - Kate E Lawlor
- Hudson Institute of Medical Research, Clayton, Victoria, Australia.,Department of Molecular and Translational Science, Monash University, Clayton, Victoria, Australia
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145
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Abstract
Sepsis was known to ancient Greeks since the time of great physician Hippocrates (460-377 BC) without exact information regarding its pathogenesis. With time and medical advances, it is now considered as a condition associated with organ dysfunction occurring in the presence of systemic infection as a result of dysregulation of the immune response. Still with this advancement, we are struggling for the development of target-based therapeutic approach for the management of sepsis. The advancement in understanding the immune system and its working has led to novel discoveries in the last 50 years, including different pattern recognition receptors. Inflammasomes are also part of these novel discoveries in the field of immunology which are <20 years old in terms of their first identification. They serve as important cytosolic pattern recognition receptors required for recognizing cytosolic pathogens, and their pathogen-associated molecular patterns play an important role in the pathogenesis of sepsis. The activation of both canonical and non-canonical inflammasome signaling pathways is involved in mounting a proinflammatory immune response via regulating the generation of IL-1β, IL-18, IL-33 cytokines and pyroptosis. In addition to pathogens and their pathogen-associated molecular patterns, death/damage-associated molecular patterns and other proinflammatory molecules involved in the pathogenesis of sepsis affect inflammasomes and vice versa. Thus, the present review is mainly focused on the inflammasomes, their role in the regulation of immune response associated with sepsis, and their targeting as a novel therapeutic approach.
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Affiliation(s)
- Vijay Kumar
- Children's Health Queensland Clinical Unit, School of Clinical Medicine, Faculty of Medicine, Mater Research, University of Queensland, Brisbane, Australia,
- School of Biomedical Sciences, Faculty of Medicine, University of Queensland, Brisbane, Australia,
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146
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Wang BJ, Chiu HW, Lee YL, Li CY, Wang YJ, Lee YH. Pterostilbene Attenuates Hexavalent Chromium-Induced Allergic Contact Dermatitis by Preventing Cell Apoptosis and Inhibiting IL-1β-Related NLRP3 Inflammasome Activation. J Clin Med 2018; 7:jcm7120489. [PMID: 30486377 PMCID: PMC6306791 DOI: 10.3390/jcm7120489] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2018] [Revised: 11/22/2018] [Accepted: 11/23/2018] [Indexed: 12/19/2022] Open
Abstract
Hexavalent chromium (Cr(VI)) is widely used in many industries but can induce contact dermatitis especially in cement industries. Many cement workers suffer from Cr(VI)-induced allergic contact dermatitis (ACD), and prevention and therapeutic strategies are still lacking. Pterostilbene (PT) is a natural compound predominantly found in blueberries. Studies indicate the potential use of PT as an effective anti-oxidative and anti-inflammatory agent. Herein, we investigated the possible mechanisms involved and whether chromium-induced ACD could be effectively inhibited by treating PT. In our in vivo study, epidermal Cr(VI) administration causes cutaneous inflammation in mice ear skin, and the pro-inflammatory cytokines, TNF-α and IL-1β, were found in the epidermis, presenting the level of increase after Cr(VI) treatment. Meanwhile, the results of our in vitro experiment showed that apoptosis and endoplasmic reticulum (ER) stress were induced after treatment with different concentrations of Cr(VI) in HaCaT cells (human keratinocyte). Cr(VI) also induced TNF-α and IL-1β mRNA expressions, through the activation of the p38 mitogen-activated protein kinase (MAPK)/MAPK-activated protein kinase 2 (MK2) pathway. Notably, the severity of the skin reactions in the epicutaneous elicitation test significantly diminished when the mouse was treated with PT. Likewise, PT intervention also ameliorated the inflammation and apoptosis of HaCaT cells in vitro. Furthermore, our current findings demonstrated that the NLRP3 inflammasome could be involved in the Cr(VI)-mediated inflammation and apoptosis of ACD. Thus, interrupting this mechanism with proper nontoxic agents, such as PT, could be a new option to improve occupational chromium toxicity and hypersensitivity.
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Affiliation(s)
- Bour-Jr Wang
- Department of Cosmetic Science and Institute of Cosmetic Science, Chia Nan University of Pharmacy and Science, Tainan 71710, Taiwan.
- Department of Occupational and Environmental Medicine, National Cheng Kung University Hospital, Tainan 70403, Taiwan.
| | - Hui-Wen Chiu
- Division of Nephrology, Department of Internal Medicine, Shuang Ho Hospital, Taipei Medical University, New Taipei City 23561, Taiwan.
- Graduate Institute of Clinical Medicine, College of Medicine, Taipei Medical University, Taipei 11031, Taiwan.
| | - Yong-Lin Lee
- Department of Environmental and Occupational Health, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan.
| | - Chia-Yi Li
- Honors in Neuroscience, Neuroscience and Mental Health Institute, Faculty of Science, University of Alberta, Edmonton, AB TG62R3, Canada.
| | - Ying-Jan Wang
- Department of Environmental and Occupational Health, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan.
- Department of Medical Research, China Medical University Hospital, China Medical University, Taichung 40402, Taiwan.
| | - Yu-Hsuan Lee
- Department of Food Safety/Hygiene and Risk Management, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan.
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147
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A fatal case of Fournier's gangrene during neoadjuvant radiotherapy for rectal cancer. Strahlenther Onkol 2018; 195:441-446. [PMID: 30470845 DOI: 10.1007/s00066-018-1401-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2018] [Accepted: 11/08/2018] [Indexed: 12/14/2022]
Abstract
PURPOSE To report the development of an ultimately fatal occurrence of Fournier's gangrene in a rectal cancer patient undergoing neoadjuvant radiotherapy without chemotherapy. METHODS A 53-year-old male patient with G2 cT3 cN1a cM0 stage IIIB adenocarcinoma of the lower rectum and several comorbidities including ulcerative colitis was treated with 56 Gy to the primary tumor in 28 fractions because he declined the recommended simultaneous chemotherapy. He was also enrolled in the ketogenic diet arm of our KETOCOMP study, so that prospective measurements of blood parameters, quality of life, and body composition were made. RESULTS The patient died 6 days after completion of radiotherapy due to septic shock associated with Fournier's gangrene reaching from the right buttock into the gluteal muscles and descending into the scrotum. In retrospect, there were several signs probably indicating the development of the gangrene: (i) a decline in bioelectrical phase angle; (ii) an accelerated weight and fat-free mass loss starting in the third week of radiotherapy; (iii) an increase in C-reactive protein (CRP) and concurrent drop in high-density lipoprotein (HDL) cholesterol and insulin-like growth factor(IGF)-1 concentrations; and (iv) the occurrence of a sharp pain in the perianal region reported in the fifth week of radiotherapy. Notably, his self-reported quality of life score was the same at the end of as before radiotherapy. CONCLUSIONS This case highlights the occurrence of Fournier's gangrene as an extremely rare but life-threatening complication during neoadjuvant radiotherapy for rectal cancer which should be refreshed in the awareness of radiation oncologists and radiologists.
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148
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Chung IC, Yuan SN, OuYang CN, Lin HC, Huang KY, Chen YJ, Chung AK, Chu CL, Ojcius DM, Chang YS, Chen LC. Src-family kinase-Cbl axis negatively regulates NLRP3 inflammasome activation. Cell Death Dis 2018; 9:1109. [PMID: 30382081 PMCID: PMC6208430 DOI: 10.1038/s41419-018-1163-z] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2018] [Accepted: 10/18/2018] [Indexed: 12/13/2022]
Abstract
Activation of the NLRP3 inflammasome is crucial for immune defense, but improper and excessive activation causes inflammatory diseases. We previously reported that Pyk2 is essential for NLRP3 inflammasome activation. Here we show that the Src-family kinases (SFKs)-Cbl axis plays a pivotal role in suppressing NLRP3 inflammasome activation in response to stimulation by nigericin or ATP, as assessed using gene knockout and gene knockdown cells, dominant active/negative mutants, and pharmacological inhibition. We reveal that the phosphorylation of Cbl is regulated by SFKs, and that phosphorylation of Cbl at Tyr371 suppresses NLRP3 inflammasome activation. Mechanistically, Cbl decreases the level of phosphorylated Pyk2 (p-Pyk2) through ubiquitination-mediated proteasomal degradation and reduces mitochondrial ROS (mtROS) production by contributing to the maintenance of mitochondrial size. The lower levels of p-Pyk2 and mtROS dampen NLRP3 inflammasome activation. In vivo, inhibition of Cbl with an analgesic drug, hydrocotarnine, increases inflammasome-mediated IL-18 secretion in the colon, and protects mice from dextran sulphate sodium-induced colitis. Together, our novel findings provide new insights into the role of the SFK-Cbl axis in suppressing NLRP3 inflammasome activation and identify a novel clinical utility of hydrocortanine for disease treatment.
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Affiliation(s)
- I-Che Chung
- Molecular Medicine Research Center, Chang Gung University, Taoyuan, 333, Taiwan
| | - Sheng-Ning Yuan
- Molecular Medicine Research Center, Chang Gung University, Taoyuan, 333, Taiwan
| | - Chun-Nan OuYang
- Molecular Medicine Research Center, Chang Gung University, Taoyuan, 333, Taiwan
| | - Hsin-Chung Lin
- Graduate Institute of Medical Sciences, National Defense Medical Center, Taipei, 114, Taiwan.,Division of Clinical Pathology, Department of Pathology, Tri-Service General Hospital, Taipei, 114, Taiwan
| | - Kuo-Yang Huang
- Graduate Institute of Pathology and Parasitology, National Defense Medical Center, Taipei, 114, Taiwan
| | - Yu-Jen Chen
- Department of Medical Research, Mackay Memorial Hospital, New Taipei City, 251, Taiwan.,Department of Radiation Oncology, Mackay Memorial Hospital, New Taipei City, 251, Taiwan
| | - An-Ko Chung
- Graduate Institute of Biomedical Sciences, College of Medicine, Chang Gung University, Taoyuan, 333, Taiwan
| | - Ching-Liang Chu
- Graduate Institute of Immunology, College of Medicine, National Taiwan University, Taipei, 100, Taiwan
| | - David M Ojcius
- Department of Biomedical Sciences, University of the Pacific Arthur A. Dugoni School of Dentistry, San Francisco, CA, 94103, USA.,Center for Molecular and Clinical Immunology, Chang Gung University, Taoyuan, 333, Taiwan.,Chang Gung Immunology Consortium, Chang Gung Memorial Hospital, Linkou, 333, Taiwan
| | - Yu-Sun Chang
- Molecular Medicine Research Center, Chang Gung University, Taoyuan, 333, Taiwan.,Graduate Institute of Biomedical Sciences, College of Medicine, Chang Gung University, Taoyuan, 333, Taiwan.,Department of Otolaryngology-Head & Neck Surgery, Chang Gung Memorial Hospital, Linkou, 333, Taiwan
| | - Lih-Chyang Chen
- Department of Medicine, Mackay Medical College, New Taipei City, 252, Taiwan.
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149
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Xu L, Zhang C, Jiang N, He D, Bai Y, Xin Y. Rapamycin combined with MCC950 to treat multiple sclerosis in experimental autoimmune encephalomyelitis. J Cell Biochem 2018; 120:5160-5168. [PMID: 30320900 DOI: 10.1002/jcb.27792] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2018] [Accepted: 09/10/2018] [Indexed: 12/26/2022]
Affiliation(s)
- Ling Xu
- Department of Biotechnology Dalian Medical University Dalian China
- Department of Clinical Laboratory Xinhua Hospital Affiliated to Dalian University Dalian China
| | - Cuili Zhang
- Department of Biotechnology Dalian Medical University Dalian China
| | - Nan Jiang
- Department of Pathology The First Affiliated Hospital of Dalian Medical University Dalian China
| | - Dan He
- Department of Cardiology The Second Affiliated Hospital of Dalian Medical University Dalian China
| | - Ying Bai
- Department of Clinical Laboratory Xinhua Hospital Affiliated to Dalian University Dalian China
| | - Yi Xin
- Department of Biotechnology Dalian Medical University Dalian China
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150
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Neuroimmunomodulation in Major Depressive Disorder: Focus on Caspase 1, Inducible Nitric Oxide Synthase, and Interferon-Gamma. Mol Neurobiol 2018; 56:4288-4305. [PMID: 30306457 PMCID: PMC6505498 DOI: 10.1007/s12035-018-1359-3] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2018] [Accepted: 09/19/2018] [Indexed: 12/13/2022]
Abstract
Major depressive disorder (MDD) is one of the leading causes of disability worldwide, and its incidence is expected to increase. Despite tremendous efforts to understand its underlying biological mechanisms, MDD pathophysiology remains elusive and pharmacotherapy outcomes are still far from ideal. Low-grade chronic inflammation seems to play a key role in mediating the interface between psychological stress, depressive symptomatology, altered intestinal microbiology, and MDD onset. We review the available pre-clinical and clinical evidence of an involvement of pro-inflammatory pathways in the pathogenesis, treatment, and remission of MDD. We focus on caspase 1, inducible nitric oxide synthase, and interferon gamma, three inflammatory systems dysregulated in MDD. Treatment strategies aiming at targeting such pathways alone or in combination with classical therapies could prove valuable in MDD. Further studies are needed to assess the safety and efficacy of immune modulation in MDD and other psychiatric disorders with neuroinflammatory components.
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