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Zhou J, Liu C, Wang X, Liu Z, Ming Z, Wang Y, Wang C, Liang Q. Diverse autoinhibitory mechanisms of FIIND-containing proteins: Insight into regulation of NLRP1 and CARD8 inflammasome. PLoS Pathog 2025; 21:e1012877. [PMID: 39854601 PMCID: PMC11760013 DOI: 10.1371/journal.ppat.1012877] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2024] [Accepted: 01/01/2025] [Indexed: 01/30/2025] Open
Abstract
Function-to-find domain (FIIND)-containing proteins, including NLRP1 and CARD8, are vital components of the inflammasome signaling pathway, critical for the innate immune response. These proteins exist in various forms due to autoproteolysis within the FIIND domain, resulting in full-length (FL), cleaved N-terminal (NT), and cleaved C-terminal (CT) peptides, which form autoinhibitory complexes in the steady state. However, the detailed mechanism remains elusive. Here, we found that both NLRP1 paralogs and CARD8 form two conserved autoinhibitory complexes involving NT-CT interactions and FL-CT interactions, but with distinct mechanisms. Specifically, the Linker3 region located between LRR and FIIND in murine NLRP1b (mNLRP1b) plays an essential role in forming the NT-CT autoinhibitory complexes, while the ZU5 of rat NLRP1 (rNLRP1) and CARD8 mediates their NT-CT interaction. In addition, we explored the involvement of the cellular protease dipeptidyl peptidases 9 (DPP9) in these complexes, revealing differential interactions and the significance of domain structure. Besides the FL-DPP9-CT complex, DPP9 interacts with NTs of mNLRP1b, rNLRP1, and CARD8 through their ZU5 subdomains, forming NT-DPP9-CT complex; however, DPP9 cannot bind to NTs of hNLRP1. Further functional assay indicated that although DPP9 is involved in the NT-CT complex of rodent NLRP1 and CARD8, it does not influence the inhibitory activity of NT on CT. Our study enhanced the understanding of the regulatory functions of FIIND-containing proteins in inflammasome autoinhibition and activation and underscored the complexity of their interactions within the immune response.
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Affiliation(s)
- Jingfan Zhou
- Institute of Pediatric Infection, Immunity, and Critical Care Medicine, Shanghai Children’s Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- Shanghai Institute of Immunology, Department of Immunology and Microbiology, Key Laboratory of Cell Differentiation and Apoptosis of Chinese Ministry of Education, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Chengrong Liu
- Institute of Pediatric Infection, Immunity, and Critical Care Medicine, Shanghai Children’s Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- Shanghai Institute of Immunology, Department of Immunology and Microbiology, Key Laboratory of Cell Differentiation and Apoptosis of Chinese Ministry of Education, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Xin Wang
- Institute of Pediatric Infection, Immunity, and Critical Care Medicine, Shanghai Children’s Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- Shanghai Institute of Immunology, Department of Immunology and Microbiology, Key Laboratory of Cell Differentiation and Apoptosis of Chinese Ministry of Education, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Zhenshan Liu
- Institute of Pediatric Infection, Immunity, and Critical Care Medicine, Shanghai Children’s Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- Shanghai Institute of Immunology, Department of Immunology and Microbiology, Key Laboratory of Cell Differentiation and Apoptosis of Chinese Ministry of Education, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Zizhen Ming
- Institute of Pediatric Infection, Immunity, and Critical Care Medicine, Shanghai Children’s Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- Shanghai Institute of Immunology, Department of Immunology and Microbiology, Key Laboratory of Cell Differentiation and Apoptosis of Chinese Ministry of Education, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yonggang Wang
- Department of Cardiovascular Center, The First Hospital of Jilin University, Changchun, China
| | - Chunxia Wang
- Institute of Pediatric Infection, Immunity, and Critical Care Medicine, Shanghai Children’s Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- Department of Critical Care Medicine, Shanghai Children’s Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Qiming Liang
- Institute of Pediatric Infection, Immunity, and Critical Care Medicine, Shanghai Children’s Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- Shanghai Institute of Immunology, Department of Immunology and Microbiology, Key Laboratory of Cell Differentiation and Apoptosis of Chinese Ministry of Education, Shanghai Jiao Tong University School of Medicine, Shanghai, China
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Chambers MJ, Scobell SB, Sadhu MJ. Systematic genetic characterization of the human PKR kinase domain highlights its functional malleability to escape a poxvirus substrate mimic. eLife 2024; 13:RP99575. [PMID: 39531012 PMCID: PMC11556786 DOI: 10.7554/elife.99575] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2024] Open
Abstract
Evolutionary arms races can arise at the contact surfaces between host and viral proteins, producing dynamic spaces in which genetic variants are continually pursued. However, the sampling of genetic variation must be balanced with the need to maintain protein function. A striking case is given by protein kinase R (PKR), a member of the mammalian innate immune system. PKR detects viral replication within the host cell and halts protein synthesis to prevent viral replication by phosphorylating eIF2α, a component of the translation initiation machinery. PKR is targeted by many viral antagonists, including poxvirus pseudosubstrate antagonists that mimic the natural substrate, eIF2α, and inhibit PKR activity. Remarkably, PKR has several rapidly evolving residues at this interface, suggesting it is engaging in an evolutionary arms race, despite the surface's critical role in phosphorylating eIF2α. To systematically explore the evolutionary opportunities available at this dynamic interface, we generated and characterized a library of 426 SNP-accessible nonsynonymous variants of human PKR for their ability to escape inhibition by the model pseudosubstrate inhibitor K3, encoded by the vaccinia virus gene K3L. We identified key sites in the PKR kinase domain that harbor K3-resistant variants, as well as critical sites where variation leads to loss of function. We find K3-resistant variants are readily available throughout the interface and are enriched at sites under positive selection. Moreover, variants beneficial against K3 were also beneficial against an enhanced variant of K3, indicating resilience to viral adaptation. Overall, we find that the eIF2α-binding surface of PKR is highly malleable, potentiating its evolutionary ability to combat viral inhibition.
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Affiliation(s)
- Michael James Chambers
- Center for Genomics and Data Science Research, National Human Genome Research Institute, National Institutes of HealthBethesdaUnited States
- Department of Microbiology & Immunology, Georgetown UniversityWashingtonUnited States
| | - Sophia B Scobell
- Center for Genomics and Data Science Research, National Human Genome Research Institute, National Institutes of HealthBethesdaUnited States
| | - Meru J Sadhu
- Center for Genomics and Data Science Research, National Human Genome Research Institute, National Institutes of HealthBethesdaUnited States
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Hu B, Zhang J, Huang J, Luo B, Zeng X, Jia J. NLRP3/1-mediated pyroptosis: beneficial clues for the development of novel therapies for Alzheimer's disease. Neural Regen Res 2024; 19:2400-2410. [PMID: 38526276 DOI: 10.4103/1673-5374.391311if:] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2023] [Accepted: 11/14/2023] [Indexed: 11/16/2024] Open
Abstract
The inflammasome is a multiprotein complex involved in innate immunity that mediates the inflammatory response leading to pyroptosis, which is a lytic, inflammatory form of cell death. There is accumulating evidence that nucleotide-binding domain and leucine-rich repeat pyrin domain containing 3 (NLRP3) inflammasome-mediated microglial pyroptosis and NLRP1 inflammasome-mediated neuronal pyroptosis in the brain are closely associated with the pathogenesis of Alzheimer's disease. In this review, we summarize the possible pathogenic mechanisms of Alzheimer's disease, focusing on neuroinflammation. We also describe the structures of NLRP3 and NLRP1 and the role their activation plays in Alzheimer's disease. Finally, we examine the neuroprotective activity of small-molecule inhibitors, endogenous inhibitor proteins, microRNAs, and natural bioactive molecules that target NLRP3 and NLRP1, based on the rationale that inhibiting NLRP3 and NLRP1 inflammasome-mediated pyroptosis can be an effective therapeutic strategy for Alzheimer's disease.
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Affiliation(s)
- Bo Hu
- Department of Pathology and Municipal Key-Innovative Discipline of Molecular Diagnostics, Jiaxing Hospital of Traditional Chinese Medicine, Jiaxing University, Jiaxing, Zhejiang Province, China
| | - Jiaping Zhang
- Research Center of Neuroscience, Jiaxing University Medical College, Jiaxing, Zhejiang Province, China
| | - Jie Huang
- Research Center of Neuroscience, Jiaxing University Medical College, Jiaxing, Zhejiang Province, China
| | - Bairu Luo
- Department of Clinical Pathology, Jiaxing University Master Degree Cultivation Base, Zhejiang Chinese Medical University, Jiaxing, Zhejiang Province, China
| | - Xiansi Zeng
- Research Center of Neuroscience, Jiaxing University Medical College, Jiaxing, Zhejiang Province, China
| | - Jinjing Jia
- Research Center of Neuroscience, Jiaxing University Medical College, Jiaxing, Zhejiang Province, China
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4
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Hu B, Zhang J, Huang J, Luo B, Zeng X, Jia J. NLRP3/1-mediated pyroptosis: beneficial clues for the development of novel therapies for Alzheimer's disease. Neural Regen Res 2024; 19:2400-2410. [PMID: 38526276 PMCID: PMC11090449 DOI: 10.4103/1673-5374.391311] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2023] [Revised: 09/06/2023] [Accepted: 11/14/2023] [Indexed: 03/26/2024] Open
Abstract
The inflammasome is a multiprotein complex involved in innate immunity that mediates the inflammatory response leading to pyroptosis, which is a lytic, inflammatory form of cell death. There is accumulating evidence that nucleotide-binding domain and leucine-rich repeat pyrin domain containing 3 (NLRP3) inflammasome-mediated microglial pyroptosis and NLRP1 inflammasome-mediated neuronal pyroptosis in the brain are closely associated with the pathogenesis of Alzheimer's disease. In this review, we summarize the possible pathogenic mechanisms of Alzheimer's disease, focusing on neuroinflammation. We also describe the structures of NLRP3 and NLRP1 and the role their activation plays in Alzheimer's disease. Finally, we examine the neuroprotective activity of small-molecule inhibitors, endogenous inhibitor proteins, microRNAs, and natural bioactive molecules that target NLRP3 and NLRP1, based on the rationale that inhibiting NLRP3 and NLRP1 inflammasome-mediated pyroptosis can be an effective therapeutic strategy for Alzheimer's disease.
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Affiliation(s)
- Bo Hu
- Department of Pathology and Municipal Key-Innovative Discipline of Molecular Diagnostics, Jiaxing Hospital of Traditional Chinese Medicine, Jiaxing University, Jiaxing, Zhejiang Province, China
| | - Jiaping Zhang
- Research Center of Neuroscience, Jiaxing University Medical College, Jiaxing, Zhejiang Province, China
| | - Jie Huang
- Research Center of Neuroscience, Jiaxing University Medical College, Jiaxing, Zhejiang Province, China
| | - Bairu Luo
- Department of Clinical Pathology, Jiaxing University Master Degree Cultivation Base, Zhejiang Chinese Medical University, Jiaxing, Zhejiang Province, China
| | - Xiansi Zeng
- Research Center of Neuroscience, Jiaxing University Medical College, Jiaxing, Zhejiang Province, China
| | - Jinjing Jia
- Research Center of Neuroscience, Jiaxing University Medical College, Jiaxing, Zhejiang Province, China
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5
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Zhang Z, Yang Z, Wang S, Wang X, Mao J. Overview of pyroptosis mechanism and in-depth analysis of cardiomyocyte pyroptosis mediated by NF-κB pathway in heart failure. Biomed Pharmacother 2024; 179:117367. [PMID: 39214011 DOI: 10.1016/j.biopha.2024.117367] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2024] [Revised: 08/14/2024] [Accepted: 08/26/2024] [Indexed: 09/04/2024] Open
Abstract
The pyroptosis of cardiomyocytes has become an essential topic in heart failure research. The abnormal accumulation of these biological factors, including angiotensin II, advanced glycation end products, and various growth factors (such as connective tissue growth factor, vascular endothelial growth factor, transforming growth factor beta, among others), activates the nuclear factor-κB (NF-κB) signaling pathway in cardiovascular diseases, ultimately leading to pyroptosis of cardiomyocytes. Therefore, exploring the underlying molecular biological mechanisms is essential for developing novel drugs and therapeutic strategies. However, our current understanding of the precise regulatory mechanism of this complex signaling pathway in cardiomyocyte pyroptosis is still limited. Given this, this study reviews the milestone discoveries in the field of pyroptosis research since 1986, analyzes in detail the similarities, differences, and interactions between pyroptosis and other cell death modes (such as apoptosis, necroptosis, autophagy, and ferroptosis), and explores the deep connection between pyroptosis and heart failure. At the same time, it depicts in detail the complete pathway of the activation, transmission, and eventual cardiomyocyte pyroptosis of the NF-κB signaling pathway in the process of heart failure. In addition, the study also systematically summarizes various therapeutic approaches that can inhibit NF-κB to reduce cardiomyocyte pyroptosis, including drugs, natural compounds, small molecule inhibitors, gene editing, and other cutting-edge technologies, aiming to provide solid scientific support and new research perspectives for the prevention and treatment of heart failure.
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Affiliation(s)
- Zeyu Zhang
- First Teaching Hospital of Tianjin University of Traditional Chinese Medicine, National Clinical Research Center for Chinese Medicine Acupuncture and Moxibustion, Tianjin 300381, China; Tianjin University of Traditional Chinese Medicine, Tianjin 301617, China
| | - Zhihua Yang
- First Teaching Hospital of Tianjin University of Traditional Chinese Medicine, National Clinical Research Center for Chinese Medicine Acupuncture and Moxibustion, Tianjin 300381, China; Tianjin University of Traditional Chinese Medicine, Tianjin 301617, China
| | - Shuai Wang
- First Teaching Hospital of Tianjin University of Traditional Chinese Medicine, National Clinical Research Center for Chinese Medicine Acupuncture and Moxibustion, Tianjin 300381, China
| | - Xianliang Wang
- First Teaching Hospital of Tianjin University of Traditional Chinese Medicine, National Clinical Research Center for Chinese Medicine Acupuncture and Moxibustion, Tianjin 300381, China.
| | - Jingyuan Mao
- First Teaching Hospital of Tianjin University of Traditional Chinese Medicine, National Clinical Research Center for Chinese Medicine Acupuncture and Moxibustion, Tianjin 300381, China.
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Abstract
Inflammasomes are supramolecular complexes that form in the cytosol in response to pathogen-associated and damage-associated stimuli, as well as other danger signals that perturb cellular homoeostasis, resulting in host defence responses in the form of cytokine release and programmed cell death (pyroptosis). Inflammasome activity is closely associated with numerous human disorders, including rare genetic syndromes of autoinflammation, cardiovascular diseases, neurodegeneration and cancer. In recent years, a range of inflammasome components and their functions have been discovered, contributing to our knowledge of the overall machinery. Here, we review the latest advances in inflammasome biology from the perspective of structural and mechanistic studies. We focus on the most well-studied components of the canonical inflammasome - NAIP-NLRC4, NLRP3, NLRP1, CARD8 and caspase-1 - as well as caspase-4, caspase-5 and caspase-11 of the noncanonical inflammasome, and the inflammasome effectors GSDMD and NINJ1. These structural studies reveal important insights into how inflammasomes are assembled and regulated, and how they elicit the release of IL-1 family cytokines and induce membrane rupture in pyroptosis.
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Affiliation(s)
- Jianing Fu
- Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, MA, USA
- Program in Cellular and Molecular Medicine, Boston Children's Hospital, Boston, MA, USA
| | - Kate Schroder
- Institute for Molecular Bioscience, The University of Queensland, St. Lucia, Queensland, Australia
| | - Hao Wu
- Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, MA, USA.
- Program in Cellular and Molecular Medicine, Boston Children's Hospital, Boston, MA, USA.
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7
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Melepat B, Li T, Vinkler M. Natural selection directing molecular evolution in vertebrate viral sensors. DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 2024; 154:105147. [PMID: 38325501 DOI: 10.1016/j.dci.2024.105147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2023] [Revised: 12/30/2023] [Accepted: 02/03/2024] [Indexed: 02/09/2024]
Abstract
Diseases caused by pathogens contribute to molecular adaptations in host immunity. Variety of viral pathogens challenging animal immunity can drive positive selection diversifying receptors recognising the infections. However, whether distinct virus sensing systems differ across animals in their evolutionary modes remains unclear. Our review provides a comparative overview of natural selection shaping molecular evolution in vertebrate viral-binding pattern recognition receptors (PRRs). Despite prevailing negative selection arising from the functional constraints, multiple lines of evidence now suggest diversifying selection in the Toll-like receptors (TLRs), NOD-like receptors (NLRs), RIG-I-like receptors (RLRs) and oligoadenylate synthetases (OASs). In several cases, location of the positively selected sites in the ligand-binding regions suggests effects on viral detection although experimental support is lacking. Unfortunately, in most other PRR families including the AIM2-like receptor family, C-type lectin receptors (CLRs), and cyclic GMP-AMP synthetase studies characterising their molecular evolution are rare, preventing comparative insight. We indicate shared characteristics of the viral sensor evolution and highlight priorities for future research.
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Affiliation(s)
- Balraj Melepat
- Charles University, Faculty of Science, Department of Zoology, Viničná 7, 128 43, Prague, EU, Czech Republic
| | - Tao Li
- Charles University, Faculty of Science, Department of Zoology, Viničná 7, 128 43, Prague, EU, Czech Republic
| | - Michal Vinkler
- Charles University, Faculty of Science, Department of Zoology, Viničná 7, 128 43, Prague, EU, Czech Republic.
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8
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Sundaram B, Tweedell RE, Prasanth Kumar S, Kanneganti TD. The NLR family of innate immune and cell death sensors. Immunity 2024; 57:674-699. [PMID: 38599165 PMCID: PMC11112261 DOI: 10.1016/j.immuni.2024.03.012] [Citation(s) in RCA: 48] [Impact Index Per Article: 48.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2024] [Revised: 03/07/2024] [Accepted: 03/12/2024] [Indexed: 04/12/2024]
Abstract
Nucleotide-binding oligomerization domain (NOD)-like receptors, also known as nucleotide-binding leucine-rich repeat receptors (NLRs), are a family of cytosolic pattern recognition receptors that detect a wide variety of pathogenic and sterile triggers. Activation of specific NLRs initiates pro- or anti-inflammatory signaling cascades and the formation of inflammasomes-multi-protein complexes that induce caspase-1 activation to drive inflammatory cytokine maturation and lytic cell death, pyroptosis. Certain NLRs and inflammasomes act as integral components of larger cell death complexes-PANoptosomes-driving another form of lytic cell death, PANoptosis. Here, we review the current understanding of the evolution, structure, and function of NLRs in health and disease. We discuss the concept of NLR networks and their roles in driving cell death and immunity. An improved mechanistic understanding of NLRs may provide therapeutic strategies applicable across infectious and inflammatory diseases and in cancer.
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Affiliation(s)
- Balamurugan Sundaram
- Department of Immunology, St. Jude Children's Research Hospital, Memphis, TN 38105, USA
| | - Rebecca E Tweedell
- Department of Immunology, St. Jude Children's Research Hospital, Memphis, TN 38105, USA
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9
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Manshouri S, Seif F, Kamali M, Bahar MA, Mashayekh A, Molatefi R. The interaction of inflammasomes and gut microbiota: novel therapeutic insights. Cell Commun Signal 2024; 22:209. [PMID: 38566180 PMCID: PMC10986108 DOI: 10.1186/s12964-024-01504-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Accepted: 01/28/2024] [Indexed: 04/04/2024] Open
Abstract
Inflammasomes are complex platforms for the cleavage and release of inactivated IL-1β and IL-18 cytokines that trigger inflammatory responses against damage-associated molecular patterns (DAMPs) or pathogen-associated molecular patterns (PAMPs). Gut microbiota plays a pivotal role in maintaining gut homeostasis. Inflammasome activation needs to be tightly regulated to limit aberrant activation and bystander damage to the host cells. Several types of inflammasomes, including Node-like receptor protein family (e.g., NLRP1, NLRP3, NLRP6, NLRP12, NLRC4), PYHIN family, and pyrin inflammasomes, interact with gut microbiota to maintain gut homeostasis. This review discusses the current understanding of how inflammasomes and microbiota interact, and how this interaction impacts human health. Additionally, we introduce novel biologics and antagonists, such as inhibitors of IL-1β and inflammasomes, as therapeutic strategies for treating gastrointestinal disorders when inflammasomes are dysregulated or the composition of gut microbiota changes.
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Affiliation(s)
- Shirin Manshouri
- Rajaei Cardiovascular Medical and Research Center, Iran University of Medical Sciences, Valiasr St, Niayesh Intersection, Tehran, 1995614331, Iran
| | - Farhad Seif
- Department of Photodynamic Therapy, Medical Laser Research Center, Academic Center for Education, Culture, and Research (ACECR), Tehran, Iran
- Department of Immunology and Allergy, Academic Center for Education, Culture, and Research (ACECR), Tehran, Iran
| | - Monireh Kamali
- Rajaei Cardiovascular Medical and Research Center, Iran University of Medical Sciences, Valiasr St, Niayesh Intersection, Tehran, 1995614331, Iran
| | - Mohammad Ali Bahar
- Department of Immunology, Medical School, Iran University of Medical Sciences, Tehran, Iran
| | - Arshideh Mashayekh
- Rajaei Cardiovascular Medical and Research Center, Iran University of Medical Sciences, Valiasr St, Niayesh Intersection, Tehran, 1995614331, Iran.
| | - Rasol Molatefi
- Cancer Immunology and Immunotherapy Research Center, Ardabil University of Medical Sciences, Ardabil, Iran.
- Pediatric Department of Bou Ali Hospital, Ardabil University of Medical Sciences, Ardabil, 56189-85991, Iran.
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Akuma DC, Wodzanowski KA, Schwartz Wertman R, Exconde PM, Vázquez Marrero VR, Odunze CE, Grubaugh D, Shin S, Taabazuing C, Brodsky IE. Catalytic activity and autoprocessing of murine caspase-11 mediate noncanonical inflammasome assembly in response to cytosolic LPS. eLife 2024; 13:e83725. [PMID: 38231198 PMCID: PMC10794067 DOI: 10.7554/elife.83725] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Accepted: 12/06/2023] [Indexed: 01/18/2024] Open
Abstract
Inflammatory caspases are cysteine protease zymogens whose activation following infection or cellular damage occurs within supramolecular organizing centers (SMOCs) known as inflammasomes. Inflammasomes recruit caspases to undergo proximity-induced autoprocessing into an enzymatically active form that cleaves downstream targets. Binding of bacterial LPS to its cytosolic sensor, caspase-11 (Casp11), promotes Casp11 aggregation within a high-molecular-weight complex known as the noncanonical inflammasome, where it is activated to cleave gasdermin D and induce pyroptosis. However, the cellular correlates of Casp11 oligomerization and whether Casp11 forms an LPS-induced SMOC within cells remain unknown. Expression of fluorescently labeled Casp11 in macrophages revealed that cytosolic LPS induced Casp11 speck formation. Unexpectedly, catalytic activity and autoprocessing were required for Casp11 to form LPS-induced specks in macrophages. Furthermore, both catalytic activity and autoprocessing were required for Casp11 speck formation in an ectopic expression system, and processing of Casp11 via ectopically expressed TEV protease was sufficient to induce Casp11 speck formation. These data reveal a previously undescribed role for Casp11 catalytic activity and autoprocessing in noncanonical inflammasome assembly, and shed new light on the molecular requirements for noncanonical inflammasome assembly in response to cytosolic LPS.
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Affiliation(s)
- Daniel C Akuma
- Department of Pathobiology, University of Pennsylvania School of Veterinary MedicinePhiladelphiaUnited States
| | - Kimberly A Wodzanowski
- Department of Microbiology, University of Pennsylvania Perelman School of MedicinePhiladelphiaUnited States
| | - Ronit Schwartz Wertman
- Department of Pathobiology, University of Pennsylvania School of Veterinary MedicinePhiladelphiaUnited States
| | - Patrick M Exconde
- Department of Biochemistry and Biophysics, University of Pennsylvania Perelman School of MedicinePhiladelphiaUnited States
| | - Víctor R Vázquez Marrero
- Department of Microbiology, University of Pennsylvania Perelman School of MedicinePhiladelphiaUnited States
| | | | - Daniel Grubaugh
- Department of Pathobiology, University of Pennsylvania School of Veterinary MedicinePhiladelphiaUnited States
| | - Sunny Shin
- Department of Microbiology, University of Pennsylvania Perelman School of MedicinePhiladelphiaUnited States
| | - Cornelius Taabazuing
- Department of Biochemistry and Biophysics, University of Pennsylvania Perelman School of MedicinePhiladelphiaUnited States
| | - Igor E Brodsky
- Department of Pathobiology, University of Pennsylvania School of Veterinary MedicinePhiladelphiaUnited States
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11
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Kaushik A, Rana N, Ashawat MS, Ankalgi A, Sharma A. Alternatives to β-Lactams as Agents for the Management of Dentoalveolar Abscess. Curr Top Med Chem 2024; 24:1870-1882. [PMID: 38840393 DOI: 10.2174/0115680266289334240530104637] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2023] [Revised: 04/25/2024] [Accepted: 05/04/2024] [Indexed: 06/07/2024]
Abstract
Dentoalveolar abscess are localized infections within the tooth or the surrounding alveolar bone, often resulting from untreated dental caries or dental trauma causing alveolar bone resorption or even loss. Serious consequences arising from the spread of a dental abscess can often lead to significant morbidity and mortality. The acute dentoalveolar abscess is a polymicrobial infection comprising strict anaerobes, such as anaerobic cocci i.e., Prevotella fusobacterium species, and facultative anaerobes i.e., Streptococci viridians and Streptococcus anginosus. Moreover, inappropriately managed dental infections can progress to severe submandibular space infections with associated serious complications, such as sepsis and airway obstruction. An audit of the Hull Royal Infirmary between 1999 and 2004 showed an increase in the number of patients presenting to oral and maxillofacial surgery services with dental sepsis. Thus, the scientific community is forced to focus on treatment strategies for the management of dentoalveolar abscess (DAA) and other related dental problems. The current treatment includes antibiotic therapy, including β-lactams and non-β- lactams drugs, but it leads to the development of resistant microorganisms due to improper and wide usage. Furthermore, the currently used β-lactam therapeutics is non-specific and easily hydrolyzed by the β-lactamase enzymes. Thus, the research focused on the non-β-lactams that can be the potential pharmacophore and helpful in the management of DAA, as the appropriate use and choice of antibiotics in dentistry plays an important role in antibiotic stewardship. The newer target for the choice is NLRP inflammasome, which is the major chemical mediator involved in dental problems. This review focused on pathogenesis and current therapeutics for the treatment of dentoalveolar abscesses.
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Affiliation(s)
- Aditi Kaushik
- Department of Pharmaceutical Sciences, Laureate Institute of Pharmacy, Kathog, Kangra, H.P, India
| | - Nidhika Rana
- Department of Pharmaceutical Sciences, Laureate Institute of Pharmacy, Kathog, Kangra, H.P, India
| | - Mahendra Singh Ashawat
- Department of Pharmaceutical Sciences, Laureate Institute of Pharmacy, Kathog, Kangra, H.P, India
| | - Amardeep Ankalgi
- Department of Pharmaceutical Sciences, Laureate Institute of Pharmacy, Kathog, Kangra, H.P, India
| | - Ankit Sharma
- Department of Pharmaceutical Sciences, Laureate Institute of Pharmacy, Kathog, Kangra, H.P, India
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12
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Tibble R, Yonemitsu MA, Mitchell PS. Stalled but not forgotten: Bacterial exotoxins inhibit translation to activate NLRP1. J Exp Med 2023; 220:e20231160. [PMID: 37642998 PMCID: PMC10465322 DOI: 10.1084/jem.20231160] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/31/2023] Open
Abstract
In this issue of JEM, companion articles from Pinilla et al. (2023. J. Exp. Med.https://doi.org/10.1084/jem.20230104) and Robinson et al. (2023. J. Exp. Med.https://doi.org/10.1084/jem.20230105) demonstrate that ribotoxic stress induced by Pseudomonas aeruginosa and Corynebacterium diphtheriae EEF2-targeting exotoxins leads to NLRP1 inflammasome activation, representing a new mechanism of effector-triggered immunity.
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Affiliation(s)
- Ryan Tibble
- Department of Microbiology, University of Washington, Seattle, WA, USA
| | - Marisa A. Yonemitsu
- Molecular and Cellular Biology Graduate Program, University of Washington, Seattle, WA, USA
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13
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Chou WC, Jha S, Linhoff MW, Ting JPY. The NLR gene family: from discovery to present day. Nat Rev Immunol 2023; 23:635-654. [PMID: 36973360 PMCID: PMC11171412 DOI: 10.1038/s41577-023-00849-x] [Citation(s) in RCA: 85] [Impact Index Per Article: 42.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/15/2023] [Indexed: 03/29/2023]
Abstract
The mammalian NLR gene family was first reported over 20 years ago, although several genes that were later grouped into the family were already known at that time. Although it is widely known that NLRs include inflammasome receptors and/or sensors that promote the maturation of caspase 1, IL-1β, IL-18 and gasdermin D to drive inflammation and cell death, the other functions of NLR family members are less well appreciated by the scientific community. Examples include MHC class II transactivator (CIITA), a master transcriptional activator of MHC class II genes, which was the first mammalian NBD-LRR-containing protein to be identified, and NLRC5, which regulates the expression of MHC class I genes. Other NLRs govern key inflammatory signalling pathways or interferon responses, and several NLR family members serve as negative regulators of innate immune responses. Multiple NLRs regulate the balance of cell death, cell survival, autophagy, mitophagy and even cellular metabolism. Perhaps the least discussed group of NLRs are those with functions in the mammalian reproductive system. The focus of this Review is to provide a synopsis of the NLR family, including both the intensively studied and the underappreciated members. We focus on the function, structure and disease relevance of NLRs and highlight issues that have received less attention in the NLR field. We hope this may serve as an impetus for future research on the conventional and non-conventional roles of NLRs within and beyond the immune system.
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Affiliation(s)
- Wei-Chun Chou
- Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
- Department of Genetics, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Sushmita Jha
- Department of Bioscience and Bioengineering, Indian Institute of Technology Jodhpur, Jodhpur, India
| | - Michael W Linhoff
- Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.
- Department of Genetics, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.
| | - Jenny P-Y Ting
- Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.
- Department of Genetics, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.
- Department of Microbiology and Immunology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.
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14
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Castro LK, Daugherty MD. Tripping the wire: sensing of viral protease activity by CARD8 and NLRP1 inflammasomes. Curr Opin Immunol 2023; 83:102354. [PMID: 37311351 PMCID: PMC10528193 DOI: 10.1016/j.coi.2023.102354] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Revised: 05/11/2023] [Accepted: 05/14/2023] [Indexed: 06/15/2023]
Abstract
Host innate immune sensors are vital for the initial detection of pathogen infection. Such sensors thus need to constantly adapt in escalating evolutionary arms races with pathogens. Recently, two inflammasome-forming proteins, CARD8 and NLRP1, have emerged as innate immune sensors for the enzymatic activity of virus-encoded proteases. When cleaved within a rapidly evolving 'tripwire' region, CARD8 and NLRP1 assemble into inflammasomes that initiate pyroptotic cell death and pro-inflammatory cytokine release as a form of effector-triggered immunity. Short motifs in the CARD8 and NLRP1 tripwires mimic the protease-specific cleavage sites of picornaviruses, coronaviruses, and HIV-1, providing virus-specific sensing that can rapidly change between closely related hosts and within the human population. Recent work highlights the evolutionary arms races between viral proteases and NLRP1 and CARD8, including insights into the mechanisms of inflammasome activation, host diversity of viral sensing, and means that viruses have evolved to avoid tripping the wire.
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Affiliation(s)
- Lennice K Castro
- Department of Molecular Biology, School of Biological Sciences, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA
| | - Matthew D Daugherty
- Department of Molecular Biology, School of Biological Sciences, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA.
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15
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Liu T, Wang Q, Du Z, Yin L, Li J, Meng X, Xue D. The trigger for pancreatic disease: NLRP3 inflammasome. Cell Death Discov 2023; 9:246. [PMID: 37452057 PMCID: PMC10349060 DOI: 10.1038/s41420-023-01550-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2023] [Revised: 06/23/2023] [Accepted: 07/05/2023] [Indexed: 07/18/2023] Open
Abstract
NLRP3 inflammasome is a multiprotein complex expressed in a variety of cells to stimulate the production of inflammatory factors. Activation of NLRP3 inflammasome depends on a complex regulatory mechanism, and its pro-inflammatory function plays an important role in pancreatic diseases. In this literature review, we summarize the activation mechanism of NLRP3 and analyze its role in each of the four typical pancreatic diseases. Through this article, we provide a relatively comprehensive summary to the researchers in this field, and provide some targeted therapy routes.
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Affiliation(s)
- Tianming Liu
- Department of General Surgery, The First Affiliated Hospital of Harbin Medical University, Harbin, 150001, China
- Key Laboratory of Hepatosplenic Surgery, Ministry of Education, The First Affiliated Hospital of Harbin Medical University, Harbin, 150001, China
| | - Qiang Wang
- Department of General Surgery, The First Affiliated Hospital of Harbin Medical University, Harbin, 150001, China
- Key Laboratory of Hepatosplenic Surgery, Ministry of Education, The First Affiliated Hospital of Harbin Medical University, Harbin, 150001, China
| | - Zhiwei Du
- Department of General Surgery, The First Affiliated Hospital of Harbin Medical University, Harbin, 150001, China
- Key Laboratory of Hepatosplenic Surgery, Ministry of Education, The First Affiliated Hospital of Harbin Medical University, Harbin, 150001, China
| | - Lu Yin
- Department of General Surgery, The First Affiliated Hospital of Harbin Medical University, Harbin, 150001, China
- Key Laboratory of Hepatosplenic Surgery, Ministry of Education, The First Affiliated Hospital of Harbin Medical University, Harbin, 150001, China
| | - Jiachen Li
- Department of General Surgery, The First Affiliated Hospital of Harbin Medical University, Harbin, 150001, China
- Key Laboratory of Hepatosplenic Surgery, Ministry of Education, The First Affiliated Hospital of Harbin Medical University, Harbin, 150001, China
| | - Xianzhi Meng
- Department of General Surgery, The First Affiliated Hospital of Harbin Medical University, Harbin, 150001, China.
- Key Laboratory of Hepatosplenic Surgery, Ministry of Education, The First Affiliated Hospital of Harbin Medical University, Harbin, 150001, China.
| | - Dongbo Xue
- Department of General Surgery, The First Affiliated Hospital of Harbin Medical University, Harbin, 150001, China.
- Key Laboratory of Hepatosplenic Surgery, Ministry of Education, The First Affiliated Hospital of Harbin Medical University, Harbin, 150001, China.
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16
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Zhou W, Zhao L, Wang H, Liu X, Liu Y, Xu K, Yu H, Suda K, He Y. Pyroptosis: A promising target for lung cancer therapy. CHINESE MEDICAL JOURNAL PULMONARY AND CRITICAL CARE MEDICINE 2023; 1:94-101. [PMID: 39170826 PMCID: PMC11332860 DOI: 10.1016/j.pccm.2023.03.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/19/2022] [Indexed: 08/23/2024]
Abstract
Pyroptosis is a type of programed cell death that differs from apoptosis, ferroptosis, or necrosis. Numerous studies have reported that it plays a critical role in tumorigenesis and modification of the tumor microenvironment in multiple tumors. In this review, we briefly describe the canonical, non-canonical, and alternative mechanisms of pyroptotic cell death. We also summarize the potential roles of pyroptosis in oncogenesis, tumor development, and lung cancer treatment, including chemotherapy, radiotherapy, targeted therapy, and immunotherapy. Pyroptosis has double-edged effects on the modulation of the tumor environment and lung cancer treatment. Further exploration of pyroptosis-based drugs could provide novel therapeutic strategies for lung cancer.
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Affiliation(s)
- Wensheng Zhou
- Department of Pulmonary Medicine, Shanghai Chest Hospital, Shanghai Jiao Tong University, Shanghai 200030, China
| | - Lishu Zhao
- Department of Medical Oncology, Shanghai Pulmonary Hospital, School of Medicine, Tongji University, Shanghai 200433, China
- School of Medicine, Tongji University, Shanghai 200092, China
| | - Hao Wang
- Department of Medical Oncology, Shanghai Pulmonary Hospital, School of Medicine, Tongji University, Shanghai 200433, China
- School of Medicine, Tongji University, Shanghai 200092, China
| | - Xinyue Liu
- Department of Medical Oncology, Shanghai Pulmonary Hospital, School of Medicine, Tongji University, Shanghai 200433, China
- School of Medicine, Tongji University, Shanghai 200092, China
| | - Yujin Liu
- Department of Medical Oncology, Shanghai Pulmonary Hospital, School of Medicine, Tongji University, Shanghai 200433, China
- School of Medicine, Tongji University, Shanghai 200092, China
| | - Kandi Xu
- Department of Medical Oncology, Shanghai Pulmonary Hospital, School of Medicine, Tongji University, Shanghai 200433, China
- School of Medicine, Tongji University, Shanghai 200092, China
| | - Hui Yu
- Department of Medicine, Division of Medical Oncology and Department of Pathology, University of Colorado Cancer Center, Aurora, CO 80045, USA
| | - Kenichi Suda
- Department of Surgery, Division of Thoracic Surgery, Kindai University Faculty of Medicine, Osaka-Sayama 589-8511, Japan
| | - Yayi He
- Department of Medical Oncology, Shanghai Pulmonary Hospital, School of Medicine, Tongji University, Shanghai 200433, China
- School of Medicine, Tongji University, Shanghai 200092, China
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17
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Tsu BV, Agarwal R, Gokhale NS, Kulsuptrakul J, Ryan AP, Fay EJ, Castro LK, Beierschmitt C, Yap C, Turcotte EA, Delgado-Rodriguez SE, Vance RE, Hyde JL, Savan R, Mitchell PS, Daugherty MD. Host-specific sensing of coronaviruses and picornaviruses by the CARD8 inflammasome. PLoS Biol 2023; 21:e3002144. [PMID: 37289745 PMCID: PMC10249858 DOI: 10.1371/journal.pbio.3002144] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2022] [Accepted: 05/02/2023] [Indexed: 06/10/2023] Open
Abstract
Hosts have evolved diverse strategies to respond to microbial infections, including the detection of pathogen-encoded proteases by inflammasome-forming sensors such as NLRP1 and CARD8. Here, we find that the 3CL protease (3CLpro) encoded by diverse coronaviruses, including Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2), cleaves a rapidly evolving region of human CARD8 and activates a robust inflammasome response. CARD8 is required for cell death and the release of pro-inflammatory cytokines during SARS-CoV-2 infection. We further find that natural variation alters CARD8 sensing of 3CLpro, including 3CLpro-mediated antagonism rather than activation of megabat CARD8. Likewise, we find that a single nucleotide polymorphism (SNP) in humans reduces CARD8's ability to sense coronavirus 3CLpros and, instead, enables sensing of 3C proteases (3Cpro) from select picornaviruses. Our findings demonstrate that CARD8 is a broad sensor of viral protease activities and suggests that CARD8 diversity contributes to inter- and intraspecies variation in inflammasome-mediated viral sensing and immunopathology.
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Affiliation(s)
- Brian V. Tsu
- Department of Molecular Biology, University of California, San Diego, La Jolla, California, United States of America
| | - Rimjhim Agarwal
- Department of Molecular Biology, University of California, San Diego, La Jolla, California, United States of America
| | - Nandan S. Gokhale
- Department of Immunology, University of Washington; Seattle, Washington, United States of America
| | - Jessie Kulsuptrakul
- Molecular and Cellular Biology Graduate Program, University of Washington; Seattle, Washington, United States of America
| | - Andrew P. Ryan
- Department of Molecular Biology, University of California, San Diego, La Jolla, California, United States of America
| | - Elizabeth J. Fay
- Department of Molecular Biology, University of California, San Diego, La Jolla, California, United States of America
| | - Lennice K. Castro
- Department of Molecular Biology, University of California, San Diego, La Jolla, California, United States of America
| | - Christopher Beierschmitt
- Department of Molecular Biology, University of California, San Diego, La Jolla, California, United States of America
| | - Christina Yap
- Department of Microbiology, University of Washington; Seattle, Washington, United States of America
| | - Elizabeth A. Turcotte
- Division of Immunology and Pathogenesis, University of California, Berkeley, Berkeley, California, United States of America
| | - Sofia E. Delgado-Rodriguez
- Department of Molecular Biology, University of California, San Diego, La Jolla, California, United States of America
| | - Russell E. Vance
- Division of Immunology and Pathogenesis, University of California, Berkeley, Berkeley, California, United States of America
- Howard Hughes Medical Institute, University of California, Berkeley, Berkeley, California, United States of America
| | - Jennifer L. Hyde
- Department of Microbiology, University of Washington; Seattle, Washington, United States of America
| | - Ram Savan
- Department of Immunology, University of Washington; Seattle, Washington, United States of America
| | - Patrick S. Mitchell
- Department of Microbiology, University of Washington; Seattle, Washington, United States of America
| | - Matthew D. Daugherty
- Department of Molecular Biology, University of California, San Diego, La Jolla, California, United States of America
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18
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Barnett KC, Li S, Liang K, Ting JPY. A 360° view of the inflammasome: Mechanisms of activation, cell death, and diseases. Cell 2023; 186:2288-2312. [PMID: 37236155 PMCID: PMC10228754 DOI: 10.1016/j.cell.2023.04.025] [Citation(s) in RCA: 206] [Impact Index Per Article: 103.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Revised: 04/06/2023] [Accepted: 04/17/2023] [Indexed: 05/28/2023]
Abstract
Inflammasomes are critical sentinels of the innate immune system that respond to threats to the host through recognition of distinct molecules, known as pathogen- or damage-associated molecular patterns (PAMPs/DAMPs), or disruptions of cellular homeostasis, referred to as homeostasis-altering molecular processes (HAMPs) or effector-triggered immunity (ETI). Several distinct proteins nucleate inflammasomes, including NLRP1, CARD8, NLRP3, NLRP6, NLRC4/NAIP, AIM2, pyrin, and caspases-4/-5/-11. This diverse array of sensors strengthens the inflammasome response through redundancy and plasticity. Here, we present an overview of these pathways, outlining the mechanisms of inflammasome formation, subcellular regulation, and pyroptosis, and discuss the wide-reaching effects of inflammasomes in human disease.
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Affiliation(s)
- Katherine C Barnett
- Department of Genetics, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA; Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA; Department of Microbiology and Immunology, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA.
| | - Sirui Li
- Department of Genetics, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA; Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA; Department of Microbiology and Immunology, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Kaixin Liang
- Department of Genetics, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA; Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA; Department of Microbiology and Immunology, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA; Oral and Craniofacial Biomedicine Program, Adams School of Dentistry, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Jenny P-Y Ting
- Department of Genetics, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA; Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA; Department of Microbiology and Immunology, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA; Oral and Craniofacial Biomedicine Program, Adams School of Dentistry, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA.
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19
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Ducournau C, Cantin P, Alerte V, Quintard B, Popelin-Wedlarski F, Wedlarski R, Ollivet-Courtois F, Ferri-Pisani Maltot J, Herkt C, Fasquelle F, Sannier M, Berthet M, Fretay V, Aubert D, Villena I, Betbeder D, Moiré N, Dimier-Poisson I. Vaccination of squirrel monkeys (Saimiri spp.) with nanoparticle based-Toxoplasma gondii antigens: new hope for captive susceptible species. Int J Parasitol 2023; 53:333-346. [PMID: 36997082 DOI: 10.1016/j.ijpara.2023.02.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Revised: 02/01/2023] [Accepted: 02/04/2023] [Indexed: 03/31/2023]
Abstract
Squirrel monkeys (Saimiri spp.), new world primates from South America, are very susceptible to toxoplasmosis. Numerous outbreaks of fatal toxoplasmosis in zoos have been identified around the world, resulting in acute respiratory distress and sudden death. To date, preventive hygiene measures or available treatments are not able to significantly reduce this mortality in zoos. Therefore, vaccination seems to be the best long-term solution to control acute toxoplasmosis. Recently, we developed a nasal vaccine composed of total extract of soluble proteins of Toxoplasma gondii associated with muco-adhesive maltodextrin-nanoparticles. The vaccine, which generated specific cellular immune responses, demonstrated efficacy against toxoplasmosis in murine and ovine experimental models. In collaboration with six French zoos, our vaccine was used as a last resort in 48 squirrel monkeys to prevent toxoplasmosis. The full protocol of vaccination includes two intranasal sprays followed by combined intranasal and s.c. administration. No local or systemic side-effects were observed irrespective of the route of administration. Blood samples were collected to study systemic humoral and cellular immune responses up to 1 year after the last vaccination. Vaccination induced a strong and lasting systemic cellular immune response mediated by specific IFN-γ secretion by peripheral blood mononuclear cells. Since the introduction of vaccination, no deaths of squirrel monkeys due to T. gondii has been observed for more than 4 years suggesting the promising usage of our vaccine. Moreover, to explain the high susceptibility of naive squirrel monkeys to toxoplasmosis, their innate immune sensors were investigated. It was observed that Toll-like and Nod-like receptors appear to be functional following T. gondii recognition suggesting that the extreme susceptibility to toxoplasmosis may not be linked to innate detection of the parasite.
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20
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Hansen T, Fong S, Capra JA, Hodges E. Human gene regulatory evolution is driven by the divergence of regulatory element function in both cis and trans. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.02.14.528376. [PMID: 36824965 PMCID: PMC9949080 DOI: 10.1101/2023.02.14.528376] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/17/2023]
Abstract
Gene regulatory divergence between species can result from cis-acting local changes to regulatory element DNA sequences or global trans-acting changes to the regulatory environment. Understanding how these mechanisms drive regulatory evolution has been limited by challenges in identifying trans-acting changes. We present a comprehensive approach to directly identify cis- and trans-divergent regulatory elements between human and rhesus macaque lymphoblastoid cells using ATAC-STARR-seq. In addition to thousands of cis changes, we discover an unexpected number (~10,000) of trans changes and show that cis and trans elements exhibit distinct patterns of sequence divergence and function. We further identify differentially expressed transcription factors that underlie >50% of trans differences and trace how cis changes can produce cascades of trans changes. Overall, we find that most divergent elements (67%) experienced changes in both cis and trans, revealing a substantial role for trans divergence-alone and together with cis changes-to regulatory differences between species.
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Affiliation(s)
- Tyler Hansen
- Department of Biochemistry, Vanderbilt University School of Medicine, Nashville, TN 37212, USA
| | - Sarah Fong
- Vanderbilt Genetics Institute, Vanderbilt University School of Medicine, Nashville, TN 37212, USA
- Bakar Computational Health Sciences Institute, University of California, San Francisco, San Francisco, CA 94143, USA
| | - John A. Capra
- Bakar Computational Health Sciences Institute, University of California, San Francisco, San Francisco, CA 94143, USA
| | - Emily Hodges
- Department of Biochemistry, Vanderbilt University School of Medicine, Nashville, TN 37212, USA
- Vanderbilt Genetics Institute, Vanderbilt University School of Medicine, Nashville, TN 37212, USA
- Lead contact
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21
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Patil P, Doshi G. Deciphering the Role of Pyroptosis Impact on Cardiovascular Diseases. Curr Drug Targets 2023; 24:1166-1183. [PMID: 38164730 DOI: 10.2174/0113894501267496231102114410] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Revised: 09/19/2023] [Accepted: 09/22/2023] [Indexed: 01/03/2024]
Abstract
Pyroptosis has become a noteworthy area of focus in recent years due to its association with inflammatory diseases. Pyroptosis is a type of programmed cell death accompanied by an inflammatory response, and the discovery of the gasdermin family has expanded the study of pyroptosis. The primary characteristics of pyroptosis include cell expansion, membrane penetration, and the ejection of cell contents. In healthy physiology, pyroptosis is an essential part of the host's defence against pathogen infection. Excessive Pyroptosis, however, can lead to unchecked and persistent inflammatory responses, including the emergence of inflammatory diseases. More precisely, gasdermin family members have a role in the creation of membrane holes during pyroptosis, which leads to cell lysis. It is also related to how pro-inflammatory intracellular substances, including IL-1, IL-18, and High mobility group box 1 (HMGB1), are used. Two different signalling pathways, one of which is regulated by caspase-1 and the other by caspase-4/5/11, are the primary causes of pyroptosis. Cardiovascular diseases are often associated with cell death and acute or chronic inflammation, making this area of research particularly relevant. In this review, we first systematically summarize recent findings related to Pyroptosis, exploring its characteristics and the signalling pathway mechanisms, as well as various treatment strategies based on its modulation that has emerged from the studies. Some of these strategies are currently undergoing clinical trials. Additionally, the article elaborates on the scientific evidence indicating the role of Pyroptosis in various cardiovascular diseases. As a whole, this should shed insight into future paths and present innovative ideas for employing Pyroptosis as a strong disease-fighting weapon.
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Affiliation(s)
- Poonam Patil
- Department of Pharmacology, SVKM's Dr. Bhanuben Nanavati College of Pharmacy, VLM Road, Vile Parle (w), Mumbai, 400056, India
| | - Gaurav Doshi
- Department of Pharmacology, SVKM's Dr. Bhanuben Nanavati College of Pharmacy, VLM Road, Vile Parle (w), Mumbai, 400056, India
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22
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Chang MX. Emerging mechanisms and functions of inflammasome complexes in teleost fish. Front Immunol 2023; 14:1065181. [PMID: 36875130 PMCID: PMC9978379 DOI: 10.3389/fimmu.2023.1065181] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2022] [Accepted: 02/06/2023] [Indexed: 02/18/2023] Open
Abstract
Inflammasomes are multiprotein complexes, which are assembled in response to a diverse range of exogenous pathogens and endogenous danger signals, leading to produce pro-inflammatory cytokines and induce pyroptotic cell death. Inflammasome components have been identified in teleost fish. Previous reviews have highlighted the conservation of inflammasome components in evolution, inflammasome function in zebrafish infectious and non-infectious models, and the mechanism that induce pyroptosis in fish. The activation of inflammasome involves the canonical and noncanonical pathways, which can play critical roles in the control of various inflammatory and metabolic diseases. The canonical inflammasomes activate caspase-1, and their signaling is initiated by cytosolic pattern recognition receptors. However the noncanonical inflammasomes activate inflammatory caspase upon sensing of cytosolic lipopolysaccharide from Gram-negative bacteria. In this review, we summarize the mechanisms of activation of canonical and noncanonical inflammasomes in teleost fish, with a particular focus on inflammasome complexes in response to bacterial infection. Furthermore, the functions of inflammasome-associated effectors, specific regulatory mechanisms of teleost inflammasomes and functional roles of inflammasomes in innate immune responses are also reviewed. The knowledge of inflammasome activation and pathogen clearance in teleost fish will shed new light on new molecular targets for treatment of inflammatory and infectious diseases.
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Affiliation(s)
- Ming Xian Chang
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of InSciences, Wuhan, China.,College of Advanced Agricultural Sciences, University of Chinese Academy of Sciences, Beijing, China.,Innovation Academy for Seed Design, Chinese Academy of Sciences, Wuhan, China
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23
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Gao H, Liu P, Dong N. Methods to Activate the NLRP1 Inflammasome. Methods Mol Biol 2023; 2696:211-222. [PMID: 37578725 DOI: 10.1007/978-1-0716-3350-2_14] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/15/2023]
Abstract
In addition to being the first NLR protein proposed to form inflammasome, NLRP1s have attracted much attention in their activation mechanism by post-translational auto-proteolysis to generate C-terminal CARD containing fragment to form inflammasome. Among NLRP1, mouse NLRP1B but not human NLRP1 is well studied for its activation by lethal toxin. As dissecting the cellular components involved in NLRP1-associated diseases is highly dependent on NLRP1 inflammasome activation, experiments that can lead to NLRP1 activation is of pivotal importance to elucidate the biological role and the activation mechanism of NLRP1 especially in human. In this chapter we describe methods commonly used for mouse NLRP1B inflammasome activation as well as activation of human NLRP1 inflammasome visualized by ASC speck formation in our laboratory.
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Affiliation(s)
- Hang Gao
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Pan Liu
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Na Dong
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, China.
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24
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Abstract
The biggest challenge to immune control of HIV infection is the rapid within-host viral evolution, which allows selection of viral variants that escape from T cell and antibody recognition. Thus, it is impossible to clear HIV infection without targeting "immutable" components of the virus. Unlike the adaptive immune system that recognizes cognate epitopes, the CARD8 inflammasome senses the essential enzymatic activity of the HIV-1 protease, which is immutable for the virus. Hence, all subtypes of HIV clinical isolates can be recognized by CARD8. In HIV-infected cells, the viral protease is expressed as a subunit of the viral Gag-Pol polyprotein and remains functionally inactive prior to viral budding. A class of anti-HIV drugs, the non-nucleoside reverse transcriptase inhibitors (NNRTIs), can promote Gag-pol dimerization and subsequent premature intracellular activation of the viral protease. NNRTI treatment triggers CARD8 inflammasome activation, which leads to pyroptosis of HIV-infected CD4+ T cells and macrophages. Targeting the CARD8 inflammasome can be a potent and broadly effective strategy for HIV eradication.
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Affiliation(s)
- Kolin M Clark
- Division of Infectious Diseases, Department of Medicine, Washington University School of Medicine, Saint Louis, MO, United States
| | - Priya Pal
- Division of Infectious Diseases, Department of Medicine, Washington University School of Medicine, Saint Louis, MO, United States
| | - Josh G Kim
- Division of Infectious Diseases, Department of Medicine, Washington University School of Medicine, Saint Louis, MO, United States
| | - Qiankun Wang
- Division of Infectious Diseases, Department of Medicine, Washington University School of Medicine, Saint Louis, MO, United States
| | - Liang Shan
- Division of Infectious Diseases, Department of Medicine, Washington University School of Medicine, Saint Louis, MO, United States; Andrew M. and Jane M. Bursky Center for Human Immunology and Immunotherapy Programs, Washington University School of Medicine, Saint Louis, MO, United States.
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25
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Abstract
The innate immune response represents the first line of host defense, and it is able to detect pathogen- and damage-associated molecular patterns (PAMPs and DAMPs, respectively) through a variety of pattern recognition receptors (PRRs). Among these PRRs, certain cytosolic receptors of the NLRs family (specifically NLRP1, NLRP3, NLRC4, and NAIP) or those containing at least a pyrin domain (PYD) such as pyrin and AIM2, activate the multimeric complex known as inflammasome, and its effector enzyme caspase-1. The caspase-1 induces the proteolytic maturation of the pro-inflammatory cytokines IL-1ß and IL-18, as well as the pore-forming protein gasdermin D (GSDMD). GSDMD is responsible for the release of the two cytokines and the induction of lytic and inflammatory cell death known as pyroptosis. Each inflammasome receptor detects specific stimuli, either directly or indirectly, thereby enhancing the cell's ability to sense infections or homeostatic disturbances. In this chapter, we present the activation mechanism of the so-called "canonical" inflammasomes.
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Affiliation(s)
| | - Alessandra Pontillo
- Departamento de Imunologia, Instituto de Ciências Biomédicas, Universidade de São Paulo, São Paulo, Brasil.
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26
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Orzalli MH, Parameswaran P. Effector-triggered immunity in mammalian antiviral defense. Trends Immunol 2022; 43:1006-1017. [PMID: 36369102 DOI: 10.1016/j.it.2022.10.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Revised: 10/06/2022] [Accepted: 10/08/2022] [Indexed: 01/12/2023]
Abstract
Effector-triggered immunity (ETI) is a common defense strategy used by mammalian host cells that is engaged upon detection of the enzymatic activities of pathogen-encoded proteins or the effects of their expression on cellular homeostasis. However, in contrast to the effector-triggered responses engaged upon bacterial infection, much less is understood about the activation and consequences of these responses following viral infection. Several recent studies have identified novel mechanisms by which viruses engage ETI, highlighting the importance of these immune responses in antiviral defense. We summarize recent advances in understanding how mammalian cells sense virus-encoded effector proteins, the downstream signaling pathways that are triggered by these sensing events, and how viruses manipulate these pathways to become more successful pathogens.
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Affiliation(s)
- Megan H Orzalli
- Program in Innate Immunity, Division of Infectious Diseases and Immunology, Department of Medicine, University of Massachusetts Chan Medical School, Worcester, MA, USA.
| | - Pooja Parameswaran
- Program in Innate Immunity, Division of Infectious Diseases and Immunology, Department of Medicine, University of Massachusetts Chan Medical School, Worcester, MA, USA
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27
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Paerewijck O, Lamkanfi M. The human inflammasomes. Mol Aspects Med 2022; 88:101100. [PMID: 35696786 DOI: 10.1016/j.mam.2022.101100] [Citation(s) in RCA: 44] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2022] [Revised: 05/25/2022] [Accepted: 06/01/2022] [Indexed: 12/14/2022]
Abstract
Two decades of inflammasome research has led to a vast body of knowledge on the complex regulatory mechanisms and pathological roles of canonical and non-canonical inflammasome activation in a plethora of research models of primarily rodent origin. More recently, the field has made notable progress in characterizing human-specific inflammasomes and their regulation mechanisms, including an expansion of inflammasome biology to adaptive immune cells. These exciting developments in basic research have been accompanied by potentially transformative results from large clinical trials and translational efforts to develop inflammasome-targeted small molecule inhibitors for therapeutic use. Here, we will discuss recent findings in the field with a specific emphasis on activation mechanisms of human inflammasomes and their potential role in auto-inflammatory, metabolic and neoplastic diseases.
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Affiliation(s)
- Oonagh Paerewijck
- Laboratory of Medical Immunology, Department of Internal Medicine and Paediatrics, Ghent University, Ghent, B-9000, Belgium
| | - Mohamed Lamkanfi
- Laboratory of Medical Immunology, Department of Internal Medicine and Paediatrics, Ghent University, Ghent, B-9000, Belgium.
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28
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Yin J, Gong G, Wan W, Liu X. Pyroptosis in spinal cord injury. Front Cell Neurosci 2022; 16:949939. [PMID: 36467606 PMCID: PMC9715394 DOI: 10.3389/fncel.2022.949939] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2022] [Accepted: 11/03/2022] [Indexed: 10/21/2023] Open
Abstract
Spinal cord injury (SCI) often brings devastating consequences to patients and their families. Pathophysiologically, the primary insult causes irreversible damage to neurons and glial cells and initiates the secondary damage cascade, further leading to inflammation, ischemia, and cells death. In SCI, the release of various inflammatory mediators aggravates nerve injury. Pyroptosis is a new pro-inflammatory pattern of regulated cell death (RCD), mainly mediated by caspase-1 or caspase-11/4/5. Gasdermins family are pore-forming proteins known as the executor of pyroptosis and the gasdermin D (GSDMD) is best characterized. Pyroptosis occurs in multiple central nervous system (CNS) cell types, especially plays a vital role in the development of SCI. We review here the evidence for pyroptosis in SCI, and focus on the pyroptosis of different cells and the crosstalk between them. In addition, we discuss the interaction between pyroptosis and other forms of RCD in SCI. We also summarize the therapeutic strategies for pyroptosis inhibition, so as to provide novel ideas for improving outcomes following SCI.
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Affiliation(s)
- Jian Yin
- Department of Orthopedics, The Affiliated Jiangning Hospital With Nanjing Medical University, Nanjing, China
- Department of Orthopedics, Shanghai General Hospital of Nanjing Medical University, Shanghai, China
| | - Ge Gong
- Department of Geriatrics, Jinling Hospital, Medical School of Nanjing University, Nanjing, China
| | - Wenhui Wan
- Department of Geriatrics, Jinling Hospital, Medical School of Nanjing University, Nanjing, China
| | - Xinhui Liu
- Department of Orthopedics, The Affiliated Jiangning Hospital With Nanjing Medical University, Nanjing, China
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29
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Ball DP, Tsamouri LP, Wang AE, Huang HC, Warren CD, Wang Q, Edmondson IH, Griswold AR, Rao SD, Johnson DC, Bachovchin DA. Oxidized thioredoxin-1 restrains the NLRP1 inflammasome. Sci Immunol 2022; 7:eabm7200. [PMID: 36332009 PMCID: PMC9850498 DOI: 10.1126/sciimmunol.abm7200] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
The danger signals that activate the NLRP1 inflammasome have not been established. Here, we report that the oxidized, but not the reduced, form of thioredoxin-1 (TRX1) binds to NLRP1. We found that oxidized TRX1 associates with the NACHT-LRR region of NLRP1 in an ATP-dependent process, forming a stable complex that restrains inflammasome activation. Consistent with these findings, patient-derived and ATPase-inactivating mutations in the NACHT-LRR region that cause hyperactive inflammasome formation interfere with TRX1 binding. Overall, this work strongly suggests that reductive stress, the cellular perturbation that will eliminate oxidized TRX1 and abrogate the TRX1-NLRP1 interaction, is a danger signal that activates the NLRP1 inflammasome.
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Affiliation(s)
- Daniel P. Ball
- Chemical Biology Program, Memorial Sloan Kettering Cancer Center, New York, New York 10065, USA
| | - Lydia P. Tsamouri
- Pharmacology Program of the Weill Cornell Graduate School of Medical Sciences, Memorial Sloan Kettering Cancer Center, New York, New York 10065, USA
| | - Alvin E. Wang
- Chemical Biology Program, Memorial Sloan Kettering Cancer Center, New York, New York 10065, USA
| | - Hsin-Che Huang
- Tri-Institutional PhD Program in Chemical Biology, Memorial Sloan Kettering Cancer Center, New York, New York 10065, USA
| | - Charles D. Warren
- Tri-Institutional PhD Program in Chemical Biology, Memorial Sloan Kettering Cancer Center, New York, New York 10065, USA
| | - Qinghui Wang
- Chemical Biology Program, Memorial Sloan Kettering Cancer Center, New York, New York 10065, USA
| | - Isabelle H. Edmondson
- Chemical Biology Program, Memorial Sloan Kettering Cancer Center, New York, New York 10065, USA
| | - Andrew R. Griswold
- Pharmacology Program of the Weill Cornell Graduate School of Medical Sciences, Memorial Sloan Kettering Cancer Center, New York, New York 10065, USA
- Weill Cornell/Rockefeller/Sloan Kettering Tri-Institutional MD-PhD Program, New York, New York 10065, USA
| | - Sahana D. Rao
- Tri-Institutional PhD Program in Chemical Biology, Memorial Sloan Kettering Cancer Center, New York, New York 10065, USA
| | - Darren C. Johnson
- Tri-Institutional PhD Program in Chemical Biology, Memorial Sloan Kettering Cancer Center, New York, New York 10065, USA
| | - Daniel A. Bachovchin
- Chemical Biology Program, Memorial Sloan Kettering Cancer Center, New York, New York 10065, USA
- Pharmacology Program of the Weill Cornell Graduate School of Medical Sciences, Memorial Sloan Kettering Cancer Center, New York, New York 10065, USA
- Tri-Institutional PhD Program in Chemical Biology, Memorial Sloan Kettering Cancer Center, New York, New York 10065, USA
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30
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Tsu BV, Agarwal R, Gokhale NS, Kulsuptrakul J, Ryan AP, Castro LK, Beierschmitt CM, Turcotte EA, Fay EJ, Vance RE, Hyde JL, Savan R, Mitchell PS, Daugherty MD. Host specific sensing of coronaviruses and picornaviruses by the CARD8 inflammasome. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2022:2022.09.21.508960. [PMID: 36172130 PMCID: PMC9516851 DOI: 10.1101/2022.09.21.508960] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Hosts have evolved diverse strategies to respond to microbial infections, including the detection of pathogen-encoded proteases by inflammasome-forming sensors such as NLRP1 and CARD8. Here, we find that the 3CL protease (3CL pro ) encoded by diverse coronaviruses, including SARS-CoV-2, cleaves a rapidly evolving region of human CARD8 and activates a robust inflammasome response. CARD8 is required for cell death and the release of pro-inflammatory cytokines during SARS-CoV-2 infection. We further find that natural variation alters CARD8 sensing of 3CL pro , including 3CL pro -mediated antagonism rather than activation of megabat CARD8. Likewise, we find that a single nucleotide polymorphism (SNP) in humans reduces CARD8’s ability to sense coronavirus 3CL pros , and instead enables sensing of 3C proteases (3C pro ) from select picornaviruses. Our findings demonstrate that CARD8 is a broad sensor of viral protease activities and suggests that CARD8 diversity contributes to inter- and intra-species variation in inflammasome-mediated viral sensing and immunopathology.
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Affiliation(s)
- Brian V. Tsu
- Department of Molecular Biology, University of California, San Diego; La Jolla, CA, USA
| | - Rimjhim Agarwal
- Department of Molecular Biology, University of California, San Diego; La Jolla, CA, USA
| | - Nandan S. Gokhale
- Department of Immunology, University of Washington; Seattle, WA, USA
| | - Jessie Kulsuptrakul
- Molecular and Cellular Biology Graduate Program, University of Washington; Seattle, WA, USA
| | - Andrew P. Ryan
- Department of Molecular Biology, University of California, San Diego; La Jolla, CA, USA
| | - Lennice K. Castro
- Department of Molecular Biology, University of California, San Diego; La Jolla, CA, USA
| | | | - Elizabeth A. Turcotte
- Division of Immunology and Pathogenesis, University of California, Berkeley; Berkeley, CA, USA
| | - Elizabeth J. Fay
- Department of Molecular Biology, University of California, San Diego; La Jolla, CA, USA
| | - Russell E. Vance
- Division of Immunology and Pathogenesis, University of California, Berkeley; Berkeley, CA, USA
- Howard Hughes Medical Institute, University of California, Berkeley; Berkeley, CA, USA
| | - Jennifer L. Hyde
- Department of Microbiology, University of Washington; Seattle, WA, USA
| | - Ram Savan
- Department of Immunology, University of Washington; Seattle, WA, USA
| | | | - Matthew D. Daugherty
- Department of Molecular Biology, University of California, San Diego; La Jolla, CA, USA
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31
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Pan Y, Cai W, Huang J, Cheng A, Wang M, Yin Z, Jia R. Pyroptosis in development, inflammation and disease. Front Immunol 2022; 13:991044. [PMID: 36189207 PMCID: PMC9522910 DOI: 10.3389/fimmu.2022.991044] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Accepted: 08/30/2022] [Indexed: 11/15/2022] Open
Abstract
In the early 2000s, caspase-1, an important molecule that has been shown to be involved in the regulation of inflammation, cell survival and diseases, was given a new function: regulating a new mode of cell death that was later defined as pyroptosis. Since then, the inflammasome, the inflammatory caspases (caspase-4/5/11) and their substrate gasdermins (gasdermin A, B, C, D, E and DFNB59) has also been reported to be involved in the pyroptotic pathway, and this pathway is closely related to the development of various diseases. In addition, important apoptotic effectors caspase-3/8 and granzymes have also been reported to b involved in the induction of pyroptosis. In our article, we summarize findings that help define the roles of inflammasomes, inflammatory caspases, gasdermins, and other mediators of pyroptosis, and how they determine cell fate and regulate disease progression.
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Affiliation(s)
- Yuhong Pan
- Research Center of Avian Disease, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
- Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, Chengdu, China
| | - Wenjun Cai
- Research Center of Avian Disease, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
- Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, Chengdu, China
| | - Juan Huang
- Research Center of Avian Disease, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
- Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, Chengdu, China
| | - Anchun Cheng
- Research Center of Avian Disease, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
- Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, Chengdu, China
- *Correspondence: Anchun Cheng, ; Renyong Jia,
| | - Mingshu Wang
- Research Center of Avian Disease, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
- Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, Chengdu, China
| | - Zhongqiong Yin
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, Chengdu, China
| | - Renyong Jia
- Research Center of Avian Disease, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
- Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, Chengdu, China
- *Correspondence: Anchun Cheng, ; Renyong Jia,
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Cébron C, Godron-Dubrasquet A, Aladjidi N, Roussey G, Boyer O, Avramescu M, Baudouin V, Terzic J, Allain-Launay E, Rieux-Laucat F, Decramer S, Simon T, Harambat J. Benign and malignant proliferation in idiopathic nephrotic syndrome: a French cohort study. Pediatr Nephrol 2022; 37:1837-1843. [PMID: 35006357 DOI: 10.1007/s00467-021-05386-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/23/2021] [Revised: 11/03/2021] [Accepted: 11/25/2021] [Indexed: 11/29/2022]
Abstract
BACKGROUND There seems to be a possible link between nephrotic syndrome (NS) and lymphoproliferative syndrome, but it remains poorly understood. METHODS This multicentric and retrospective study focuses on children, who developed idiopathic NS and malignant or benign proliferation between 2000 and 2021. RESULTS Eleven patients were included, with a median age of 4 years. Only one had a steroid-resistant nephrotic syndrome (SRNS). The maintenance therapy before the proliferation was in majority tacrolimus or mycophenolate mofetil (MMF), but three patients did not receive treatments. The proliferation was mainly a Hodgkin's lymphoma (45%) or a lymphoproliferative disease (36%), in a median time after the NS of two years. Viruses were found in seven cases (EBV in five cases and HHV-8 in two). CONCLUSION The association between proliferative syndrome and idiopathic NS may not be fortuitous, possibly with a common lymphocytic disturbance. Genetic analyses could improve the comprehension of these manifestations in the future. A higher resolution version of the Graphical abstract is available as Supplementary information.
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Affiliation(s)
- Clara Cébron
- Department of Pediatric Internal Medicine, Rheumatology and Nephrology, Centre De Référence Des Maladies Rénales Rares du Sud-Ouest, SoRare, Toulouse University Hospital, Toulouse, France
- Pediatric Department, Grenoble University Hospital, Grenoble, France
| | - Astrid Godron-Dubrasquet
- Department of Pediatrics, Pediatric Nephrology Unit, Centre De Référence Des Maladies Rénales Rares du Sud-Ouest, SoRare, Bordeaux University Hospital, Bordeaux, France
| | - Nathalie Aladjidi
- Department of Pediatrics, Pediatric Oncology Hematology Unit, Bordeaux University Hospital, Bordeaux, France
| | | | - Olivia Boyer
- Department of Pediatric Nephrology, Reference Center for Idiopathic Nephrotic Syndrome in Children and Adults, Imagine Institute, Paris University, Necker Hospital, APHP, Paris, France
| | - Marina Avramescu
- Department of Pediatric Nephrology, Reference Center for Idiopathic Nephrotic Syndrome in Children and Adults, Imagine Institute, Paris University, Necker Hospital, APHP, Paris, France
| | - Veronique Baudouin
- Department of Pediatric Nephrology, Robert Debré Hospital, APHP, Paris, France
| | - Joelle Terzic
- Department of Pediatric Nephrology, Hôpitaux Universitaires de Strasbourg, Strasbourg, France
| | | | - Frédéric Rieux-Laucat
- Imagine Institute, Laboratory of Immunogenetics of Pediatric Autoimmune Diseases, INSERM, UMR 1163, Université de Paris, Paris, France
| | - Stéphane Decramer
- Department of Pediatric Internal Medicine, Rheumatology and Nephrology, Centre De Référence Des Maladies Rénales Rares du Sud-Ouest, SoRare, Toulouse University Hospital, Toulouse, France
- Centre De Référence Des Maladies Rénales Rares du Sud-Ouest, SoRare, Membre du réseau européen ERKNet, Toulouse, France
- INSERM U1048, Institute of Cardiovascular and Metabolic Diseases, Toulouse, France
| | - Thomas Simon
- Department of Pediatric Internal Medicine, Rheumatology and Nephrology, Centre De Référence Des Maladies Rénales Rares du Sud-Ouest, SoRare, Toulouse University Hospital, Toulouse, France.
- Centre De Référence Des Maladies Rénales Rares du Sud-Ouest, SoRare, Membre du réseau européen ERKNet, Toulouse, France.
| | - Jérôme Harambat
- Department of Pediatrics, Pediatric Nephrology Unit, Centre De Référence Des Maladies Rénales Rares du Sud-Ouest, SoRare, Bordeaux University Hospital, Bordeaux, France
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33
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Wood TE, Westervelt KA, Yoon JM, Eshleman HD, Levy R, Burnes H, Slade DJ, Lesser CF, Goldberg MB. The Shigella Spp. Type III Effector Protein OspB Is a Cysteine Protease. mBio 2022; 13:e0127022. [PMID: 35638611 PMCID: PMC9239218 DOI: 10.1128/mbio.01270-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2022] [Accepted: 05/05/2022] [Indexed: 11/20/2022] Open
Abstract
The type III secretion system is required for virulence of many pathogenic bacteria. Bacterial effector proteins delivered into target host cells by this system modulate host signaling pathways and processes in a manner that promotes infection. Here, we define the activity of the effector protein OspB of the human pathogen Shigella spp., the etiological agent of shigellosis and bacillary dysentery. Using the yeast Saccharomyces cerevisiae as a model organism, we show that OspB sensitizes cells to inhibition of TORC1, the central regulator of growth and metabolism. In silico analyses reveal that OspB bears structural homology to bacterial cysteine proteases that target mammalian cell processes, and we define a conserved cysteine-histidine catalytic dyad required for OspB function. Using yeast genetic screens, we identify a crucial role for the arginine N-degron pathway in the yeast growth inhibition phenotype and show that inositol hexakisphosphate is an OspB cofactor. We find that a yeast substrate for OspB is the TORC1 component Tco89p, proteolytic cleavage of which generates a C-terminal fragment that is targeted for degradation via the arginine N-degron pathway; processing and degradation of Tco89p is required for the OspB phenotype. In all, we demonstrate that the Shigella T3SS effector OspB is a cysteine protease and decipher its interplay with eukaryotic cell processes. IMPORTANCEShigella spp. are important human pathogens and among the leading causes of diarrheal mortality worldwide, especially in children. Virulence depends on the Shigella type III secretion system (T3SS). Definition of the roles of the bacterial effector proteins secreted by the T3SS is key to understanding Shigella pathogenesis. The effector protein OspB contributes to a range of phenotypes during infection, yet the mechanism of action is unknown. Here, we show that S. flexneri OspB possesses cysteine protease activity in both yeast and mammalian cells, and that enzymatic activity of OspB depends on a conserved cysteine-histidine catalytic dyad. We determine how its protease activity sensitizes cells to TORC1 inhibition in yeast, finding that OspB cleaves a component of yeast TORC1, and that the degradation of the C-terminal cleavage product is responsible for OspB-mediated hypersensitivity to TORC1 inhibitors. Thus, OspB is a cysteine protease that depends on a conserved cysteine-histidine catalytic dyad.
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Affiliation(s)
- Thomas E. Wood
- Department of Medicine, Division of Infectious Diseases, Massachusetts General Hospital, Boston, Massachusetts, USA
- Department of Microbiology, Blavatnik Institute, Harvard Medical School, Boston, Massachusetts, USA
| | - Kathleen A. Westervelt
- Department of Medicine, Division of Infectious Diseases, Massachusetts General Hospital, Boston, Massachusetts, USA
- Department of Immunology and Infectious Diseases, Harvard T. H. Chan School of Public Health, Boston, Massachusetts, USA
| | - Jessica M. Yoon
- Department of Medicine, Division of Infectious Diseases, Massachusetts General Hospital, Boston, Massachusetts, USA
- Department of Molecular and Cellular Biology, Harvard University, Cambridge, Massachusetts, USA
| | - Heather D. Eshleman
- Department of Medicine, Division of Infectious Diseases, Massachusetts General Hospital, Boston, Massachusetts, USA
- Department of Microbiology, Blavatnik Institute, Harvard Medical School, Boston, Massachusetts, USA
| | - Roie Levy
- Department of Medicine, Division of Infectious Diseases, Massachusetts General Hospital, Boston, Massachusetts, USA
| | - Henry Burnes
- Department of Medicine, Division of Infectious Diseases, Massachusetts General Hospital, Boston, Massachusetts, USA
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts, USA
| | - Daniel J. Slade
- Department of Biochemistry, Virginia Polytechnic Institute and State University, Blacksburg, Virginia, USA
| | - Cammie F. Lesser
- Department of Medicine, Division of Infectious Diseases, Massachusetts General Hospital, Boston, Massachusetts, USA
- Department of Microbiology, Blavatnik Institute, Harvard Medical School, Boston, Massachusetts, USA
| | - Marcia B. Goldberg
- Department of Medicine, Division of Infectious Diseases, Massachusetts General Hospital, Boston, Massachusetts, USA
- Department of Microbiology, Blavatnik Institute, Harvard Medical School, Boston, Massachusetts, USA
- Department of Immunology and Infectious Diseases, Harvard T. H. Chan School of Public Health, Boston, Massachusetts, USA
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34
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Yang X, Zhou J, Liu C, Qu Y, Wang W, Xiao MZX, Zhu F, Liu Z, Liang Q. KSHV-encoded ORF45 activates human NLRP1 inflammasome. Nat Immunol 2022; 23:916-926. [PMID: 35618833 DOI: 10.1038/s41590-022-01199-x] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Accepted: 03/28/2022] [Indexed: 11/08/2022]
Abstract
At steady state, the NOD-like receptor (NLR)-containing pyrin domain (PYD) (NLRP)1 inflammasome is maintained in an auto-inhibitory complex by dipeptidyl peptidases 8 and 9 (DPP8 and DPP9) and is activated by pathogen-encoded proteases after infection. Here, we showed that the open reading frame (ORF)45 protein of the Kaposi's sarcoma-associated herpesvirus activated the human NLRP1 (hNLRP1) inflammasome in a non-protease-dependent manner, and we additionally showed that the Linker1 region of hNLRP1, situated between the PYD and NACHT domains, was required for the auto-inhibition and non-protease-dependent activation of hNLRP1. At steady state, the interaction between Linker1 and the UPA subdomain silenced the activation of hNLRP1 in auto-inhibitory complexes either containing DPP9 or not in a manner independent of DPP9. ORF45 binding to Linker1 displaced UPA from the Linker1-UPA complex and induced the release of the C-terminal domain of hNLRP1 for inflammasome assembly. The ORF45-dependent activation of the NLRP1 inflammasome was conserved in primates but was not observed for murine NLRP1b inflammasomes.
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Affiliation(s)
- Xing Yang
- Center for Immune-Related Diseases at Shanghai Institute of Immunology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- Department of Immunology and Microbiology, Key Laboratory of Cell Differentiation and Apoptosis of Chinese Ministry of Education, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Jingfan Zhou
- Center for Immune-Related Diseases at Shanghai Institute of Immunology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- Department of Immunology and Microbiology, Key Laboratory of Cell Differentiation and Apoptosis of Chinese Ministry of Education, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Chengrong Liu
- Center for Immune-Related Diseases at Shanghai Institute of Immunology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- Department of Immunology and Microbiology, Key Laboratory of Cell Differentiation and Apoptosis of Chinese Ministry of Education, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yafei Qu
- Center for Immune-Related Diseases at Shanghai Institute of Immunology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- Department of Immunology and Microbiology, Key Laboratory of Cell Differentiation and Apoptosis of Chinese Ministry of Education, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Weili Wang
- Center for Immune-Related Diseases at Shanghai Institute of Immunology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- Department of Immunology and Microbiology, Key Laboratory of Cell Differentiation and Apoptosis of Chinese Ministry of Education, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Maggie Z X Xiao
- Faculty of Medicine, University of Alberta, Edmonton, Alberta, Canada
| | - Fanxiu Zhu
- Department of Biological Science, Florida State University, Tallahassee, FL, USA
| | - Zhenshan Liu
- Center for Immune-Related Diseases at Shanghai Institute of Immunology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- Department of Immunology and Microbiology, Key Laboratory of Cell Differentiation and Apoptosis of Chinese Ministry of Education, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Qiming Liang
- Center for Immune-Related Diseases at Shanghai Institute of Immunology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.
- Department of Immunology and Microbiology, Key Laboratory of Cell Differentiation and Apoptosis of Chinese Ministry of Education, Shanghai Jiao Tong University School of Medicine, Shanghai, China.
- Research Center of Translational Medicine, Shanghai Children's Hospital, Shanghai Jiao Tong University, Shanghai, China.
- State Key Laboratory of Microbial Metabolism, Shanghai Jiao Tong University, Shanghai, China.
- Institute of Pediatric Infection, Immunity and Intensive Care Medicine, Shanghai Jiao Tong University School of Medicine, Shanghai, China.
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35
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Mi L, Min X, Chai Y, Zhang J, Chen X. NLRP1 Inflammasomes: A Potential Target for the Treatment of Several Types of Brain Injury. Front Immunol 2022; 13:863774. [PMID: 35707533 PMCID: PMC9189285 DOI: 10.3389/fimmu.2022.863774] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2022] [Accepted: 04/28/2022] [Indexed: 12/28/2022] Open
Abstract
NOD-like receptor (NLR) family pyrin domain-containing 1 (NLRP1) is a member of the NLR family. The NLRP1 inflammasome consists of the NLRP1 protein, the adaptor protein apoptosis-associated speck-like protein containing a CARD domain, and the effector molecule pro-caspase-1. When stimulated, the inflammasome initiates the cleavage of pro-caspase-1 and converts it into its active form, caspase-1; then, caspase-1 facilitates the cleavage of the proinflammatory cytokines interleukin-1β and interleukin-18 into their active and secreted forms. In addition, caspase-1 also mediates the cleavage of gasdermin D, which leads to pyroptosis, an inflammatory form of cell death. Pathological events that damage the brain and result in neuropathological conditions can generally be described as brain injury. Neuroinflammation, especially that driven by NLRP1, plays a considerable role in the pathophysiology of brain injury, such as early brain injury (EBI) of subarachnoid hemorrhage, ischemic brain injury during stroke, and traumatic brain injury (TBI). In this article, a thorough overview of NLRP1 is presented, including its structure, mechanism of activation, and role in neuroinflammation. We also present recent studies on NLRP1 as a target for the treatment of EBI, ischemic brain injury, TBI, and other types of brain injury, thus highlighting the perspective of NLRP1 as an effective mediator of catastrophic brain injury.
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Affiliation(s)
- Liang Mi
- Department of Neurosurgery, Tianjin Medical University General Hospital, Tianjin, China
- Tianjin Neurological Institute, Key Laboratory of Posttrauma Neurorepair and Regeneration in Central Nervous System, Ministry of Education, Tianjin Key Laboratory of Injuries, Variations and Regeneration of Nervous System, Tianjin, China
| | - Xiaobin Min
- Department of Neurosurgery, Tianjin Medical University General Hospital, Tianjin, China
- Baodi Clinical College, Tianjin Medical University, Tianjin, China
| | - Yan Chai
- Tianjin Neurological Institute, Key Laboratory of Posttrauma Neurorepair and Regeneration in Central Nervous System, Ministry of Education, Tianjin Key Laboratory of Injuries, Variations and Regeneration of Nervous System, Tianjin, China
| | - Jianning Zhang
- Department of Neurosurgery, Tianjin Medical University General Hospital, Tianjin, China
- Tianjin Neurological Institute, Key Laboratory of Posttrauma Neurorepair and Regeneration in Central Nervous System, Ministry of Education, Tianjin Key Laboratory of Injuries, Variations and Regeneration of Nervous System, Tianjin, China
| | - Xin Chen
- Department of Neurosurgery, Tianjin Medical University General Hospital, Tianjin, China
- Tianjin Neurological Institute, Key Laboratory of Posttrauma Neurorepair and Regeneration in Central Nervous System, Ministry of Education, Tianjin Key Laboratory of Injuries, Variations and Regeneration of Nervous System, Tianjin, China
- *Correspondence: Xin Chen,
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Planès R, Pinilla M, Santoni K, Hessel A, Passemar C, Lay K, Paillette P, Valadão ALC, Robinson KS, Bastard P, Lam N, Fadrique R, Rossi I, Pericat D, Bagayoko S, Leon-Icaza SA, Rombouts Y, Perouzel E, Tiraby M, Zhang Q, Cicuta P, Jouanguy E, Neyrolles O, Bryant CE, Floto AR, Goujon C, Lei FZ, Martin-Blondel G, Silva S, Casanova JL, Cougoule C, Reversade B, Marcoux J, Ravet E, Meunier E. Human NLRP1 is a sensor of pathogenic coronavirus 3CL proteases in lung epithelial cells. Mol Cell 2022; 82:2385-2400.e9. [PMID: 35594856 PMCID: PMC9108100 DOI: 10.1016/j.molcel.2022.04.033] [Citation(s) in RCA: 92] [Impact Index Per Article: 30.7] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2021] [Revised: 02/16/2022] [Accepted: 04/25/2022] [Indexed: 11/30/2022]
Affiliation(s)
- Rémi Planès
- Institute of Pharmacology and Structural Biology (IPBS), University of Toulouse, CNRS, Toulouse, France; InvivoGen, Toulouse, France; IRIM, University of Montpellier, CNRS, Montpellier, France.
| | - Miriam Pinilla
- Institute of Pharmacology and Structural Biology (IPBS), University of Toulouse, CNRS, Toulouse, France; InvivoGen, Toulouse, France
| | - Karin Santoni
- Institute of Pharmacology and Structural Biology (IPBS), University of Toulouse, CNRS, Toulouse, France
| | - Audrey Hessel
- Institute of Pharmacology and Structural Biology (IPBS), University of Toulouse, CNRS, Toulouse, France
| | - Charlotte Passemar
- Molecular Immunity Unit, University of Cambridge Department of Medicine, MRC-Laboratory of Molecular Biology, Cambridge, UK
| | - Kenneth Lay
- Institute of Medical Biology, Agency of Science, Technology and Research, 8A Biomedical Grove, #06-06 Immunos, 138648 Singapore, Singapore; Laboratory of Human Genetics and Therapeutics, Genome Institute of Singapore (GIS), A(∗)STAR, Singapore, Singapore
| | | | | | - Kim Samirah Robinson
- A(∗)STAR Skin Research Laboratories, 11 Mandalay Road, 308232 Singapore, Singapore
| | - Paul Bastard
- Laboratory of Human Genetics of Infectious Diseases, Necker Branch, Institut National de la Santé et de la Recherche Médicale U1163, Necker Hospital for Sick Children, Paris, France; University of Paris, Imagine Institute, Paris, France; St. Giles Laboratory of Human Genetics of Infectious Diseases, Rockefeller Branch, The Rockefeller University, New York, NY, USA
| | - Nathaniel Lam
- University of Cambridge, Department of Veterinary Medicine, Cambridge CB30ES, UK; University of Cambridge, School of Clinical Medicine, Box 111, Cambridge Biomedical Campus, Cambridge CB2 0SP, UK
| | - Ricardo Fadrique
- Biological and Soft Systems, Cavendish Laboratory, University of Cambridge, JJ Thomson Avenue, Cambridge CB3 0HE, UK
| | - Ida Rossi
- Institute of Pharmacology and Structural Biology (IPBS), University of Toulouse, CNRS, Toulouse, France
| | - David Pericat
- Institute of Pharmacology and Structural Biology (IPBS), University of Toulouse, CNRS, Toulouse, France
| | - Salimata Bagayoko
- Institute of Pharmacology and Structural Biology (IPBS), University of Toulouse, CNRS, Toulouse, France
| | - Stephen Adonai Leon-Icaza
- Institute of Pharmacology and Structural Biology (IPBS), University of Toulouse, CNRS, Toulouse, France
| | - Yoann Rombouts
- Institute of Pharmacology and Structural Biology (IPBS), University of Toulouse, CNRS, Toulouse, France
| | | | | | - Qian Zhang
- University of Paris, Imagine Institute, Paris, France
| | - Pietro Cicuta
- Biological and Soft Systems, Cavendish Laboratory, University of Cambridge, JJ Thomson Avenue, Cambridge CB3 0HE, UK
| | - Emmanuelle Jouanguy
- Laboratory of Human Genetics of Infectious Diseases, Necker Branch, Institut National de la Santé et de la Recherche Médicale U1163, Necker Hospital for Sick Children, Paris, France; University of Paris, Imagine Institute, Paris, France; St. Giles Laboratory of Human Genetics of Infectious Diseases, Rockefeller Branch, The Rockefeller University, New York, NY, USA
| | - Olivier Neyrolles
- Institute of Pharmacology and Structural Biology (IPBS), University of Toulouse, CNRS, Toulouse, France
| | - Clare E Bryant
- University of Cambridge, Department of Veterinary Medicine, Cambridge CB30ES, UK; University of Cambridge, School of Clinical Medicine, Box 111, Cambridge Biomedical Campus, Cambridge CB2 0SP, UK
| | - Andres R Floto
- Molecular Immunity Unit, University of Cambridge Department of Medicine, MRC-Laboratory of Molecular Biology, Cambridge, UK
| | | | - Franklin Zhong Lei
- A(∗)STAR Skin Research Laboratories, 11 Mandalay Road, 308232 Singapore, Singapore; Lee Kong Chian School of Medicine, Nanyang Technological University, 11 Mandalay Road, 308232 Singapore, Singapore; Skin Research Institute of Singapore (SRIS), 11 Mandalay Road, 308232 Singapore, Singapore
| | - Guillaume Martin-Blondel
- Service des Maladies Infectieuses et Tropicales, CHU de Toulouse, Toulouse, France; Institut Toulousain des Maladies Infectieuses et Inflammatoires (Infinity), INSERM UMR1291 - CNRS UMR5051 - Université Toulouse III, Toulouse, France
| | - Stein Silva
- Critical Care Unit, University Hospital of Purpan, Toulouse, France
| | - Jean-Laurent Casanova
- Laboratory of Human Genetics of Infectious Diseases, Necker Branch, Institut National de la Santé et de la Recherche Médicale U1163, Necker Hospital for Sick Children, Paris, France; University of Paris, Imagine Institute, Paris, France; St. Giles Laboratory of Human Genetics of Infectious Diseases, Rockefeller Branch, The Rockefeller University, New York, NY, USA; Howard Hughes Medical Institute, New York, NY, USA
| | - Céline Cougoule
- Institute of Pharmacology and Structural Biology (IPBS), University of Toulouse, CNRS, Toulouse, France
| | - Bruno Reversade
- Institute of Medical Biology, Agency of Science, Technology and Research, 8A Biomedical Grove, #06-06 Immunos, 138648 Singapore, Singapore; Laboratory of Human Genetics and Therapeutics, Genome Institute of Singapore (GIS), A(∗)STAR, Singapore, Singapore; Institute of Molecular and Cell Biology, 61 Biopolis Drive, 138673 Singapore, Singapore; Department of Paediatrics, Yong Loo Lin School of Medicine, National University Health System, National University of Singapore, 10 Medical Drive, 117597 Singapore, Singapore; The Medical Genetics Department, Koç University School of Medicine, 34010 Istanbul, Turkey
| | - Julien Marcoux
- Institute of Pharmacology and Structural Biology (IPBS), University of Toulouse, CNRS, Toulouse, France
| | | | - Etienne Meunier
- Institute of Pharmacology and Structural Biology (IPBS), University of Toulouse, CNRS, Toulouse, France.
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Nguyen LN, Kanneganti TD. PANoptosis in Viral Infection: The Missing Puzzle Piece in the Cell Death Field. J Mol Biol 2022; 434:167249. [PMID: 34537233 PMCID: PMC8444475 DOI: 10.1016/j.jmb.2021.167249] [Citation(s) in RCA: 49] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2021] [Accepted: 09/10/2021] [Indexed: 02/07/2023]
Abstract
In the past decade, emerging viral outbreaks like SARS-CoV-2, Zika and Ebola have presented major challenges to the global health system. Viruses are unique pathogens in that they fully rely on the host cell to complete their lifecycle and potentiate disease. Therefore, programmed cell death (PCD), a key component of the host innate immune response, is an effective strategy for the host cell to curb viral spread. The most well-established PCD pathways, pyroptosis, apoptosis and necroptosis, can be activated in response to viruses. Recently, extensive crosstalk between PCD pathways has been identified, and there is evidence that molecules from all three PCD pathways can be activated during virus infection. These findings have led to the emergence of the concept of PANoptosis, defined as an inflammatory PCD pathway regulated by the PANoptosome complex with key features of pyroptosis, apoptosis, and/or necroptosis that cannot be accounted for by any of these three PCD pathways alone. While PCD is important to eliminate infected cells, many viruses are equipped to hijack host PCD pathways to benefit their own propagation and subvert host defense, and PCD can also lead to the production of inflammatory cytokines and inflammation. Therefore, PANoptosis induced by viral infection contributes to either host defense or viral pathogenesis in context-specific ways. In this review, we will discuss the multi-faceted roles of PCD pathways in controlling viral infections.
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Affiliation(s)
- Lam Nhat Nguyen
- Department of Immunology, St. Jude Children's Research Hospital, Memphis, TN 38105, USA. https://twitter.com/LamNguy81889610
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38
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Bauernfried S, Hornung V. Human NLRP1: From the shadows to center stage. J Exp Med 2022; 219:212910. [PMID: 34910085 PMCID: PMC8679799 DOI: 10.1084/jem.20211405] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2021] [Revised: 12/03/2021] [Accepted: 12/03/2021] [Indexed: 12/03/2022] Open
Abstract
In response to infection or cell damage, inflammasomes form intracellular multimeric protein complexes that play an essential role in host defense. Activation results in the maturation and subsequent secretion of pro-inflammatory cytokines of the IL-1 family and a specific cell death coined pyroptosis. Human NLRP1 was the first inflammasome-forming sensor identified at the beginning of the millennium. However, its functional relevance and its mechanism of activation have remained obscure for many years. Recent discoveries in the NLRP1 field have propelled our understanding of the functional relevance and molecular mode of action of this unique inflammasome sensor, which we will discuss in this perspective.
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Affiliation(s)
- Stefan Bauernfried
- Gene Center and Department of Biochemistry, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Veit Hornung
- Gene Center and Department of Biochemistry, Ludwig-Maximilians-Universität München, Munich, Germany
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39
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Zhang Y, Jiao Y, Li X, Gao S, Zhou N, Duan J, Zhang M. Pyroptosis: A New Insight Into Eye Disease Therapy. Front Pharmacol 2021; 12:797110. [PMID: 34925047 PMCID: PMC8678479 DOI: 10.3389/fphar.2021.797110] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2021] [Accepted: 11/15/2021] [Indexed: 02/05/2023] Open
Abstract
Pyroptosis is a lytic form of programmed cell death mediated by gasdermins (GSDMs) with pore-forming activity in response to certain exogenous and endogenous stimuli. The inflammasomes are intracellular multiprotein complexes consisting of pattern recognition receptors, an adaptor protein ASC (apoptosis speck-like protein), and caspase-1 and cause autocatalytic activation of caspase-1, which cleaves gasdermin D (GSDMD), inducing pyroptosis accompanied by cytokine release. In recent years, the pathogenic roles of inflammasomes and pyroptosis in multiple eye diseases, including keratitis, dry eyes, cataracts, glaucoma, uveitis, age-related macular degeneration, and diabetic retinopathy, have been continuously confirmed. Inhibiting inflammasome activation and abnormal pyroptosis in eyes generally attenuates inflammation and benefits prognosis. Therefore, insight into the pathogenesis underlying pyroptosis and inflammasome development in various types of eye diseases may provide new therapeutic strategies for ocular disorders. Inhibitors of pyroptosis, such as NLRP3, caspase-1, and GSDMD inhibitors, have been proven to be effective in many eye diseases. The purpose of this article is to illuminate the mechanism underlying inflammasome activation and pyroptosis and emphasize its crucial role in various ocular disorders. In addition, we review the application of pyroptosis modulators in eye diseases.
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Affiliation(s)
- Yun Zhang
- Department of Ophthalmology, West China Hospital, Sichuan University, Chengdu, China.,Research Laboratory of Macular Disease, West China Hospital, Sichuan University, Chengdu, China
| | - Yan Jiao
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Chengdu, China
| | - Xun Li
- Department of Ophthalmology, West China Hospital, Sichuan University, Chengdu, China.,Research Laboratory of Macular Disease, West China Hospital, Sichuan University, Chengdu, China
| | - Sheng Gao
- Department of Ophthalmology, West China Hospital, Sichuan University, Chengdu, China.,Research Laboratory of Macular Disease, West China Hospital, Sichuan University, Chengdu, China
| | - Nenghua Zhou
- Key Laboratory of Drug Targeting and Drug Delivery System of Ministry of Education, West China School of Pharmacy, Sichuan University, Chengdu, China
| | - Jianan Duan
- Department of Ophthalmology, West China Hospital, Sichuan University, Chengdu, China.,Research Laboratory of Macular Disease, West China Hospital, Sichuan University, Chengdu, China
| | - Meixia Zhang
- Department of Ophthalmology, West China Hospital, Sichuan University, Chengdu, China.,Research Laboratory of Macular Disease, West China Hospital, Sichuan University, Chengdu, China
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40
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Lee CH, Kim KT, Kim CH, Lee EY, Lee SG, Seo ME, Kim JH, Chung CK. Unveiling the genetic variation of severe continuous/mixed-type ossification of the posterior longitudinal ligament by whole-exome sequencing and bioinformatic analysis. Spine J 2021; 21:1847-1856. [PMID: 34273568 DOI: 10.1016/j.spinee.2021.07.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/06/2021] [Revised: 06/16/2021] [Accepted: 07/02/2021] [Indexed: 02/03/2023]
Abstract
BACKGROUND CONTEXT Ossification of the posterior longitudinal ligament (OPLL) in the cervical spine is known as a rare, complex genetic disease, its complexity being partly because OPLL is diagnosed by radiological findings regardless of clinical or genetic evaluations. Although many genes associated with susceptibility have been reported, the exact causative genes are still unknown. PURPOSE We performed an analysis using next-generation sequencing and including only patients with a clear involved phenotype. STUDY DESIGN/SETTING This was a case control study. PATIENT SAMPLE A total of 74 patients with severe OPLL and 26 healthy controls were included. OUTCOME MEASURES Causal single-nucleotide variant (SNV), gene-wise variant burden (GVB), and related pathway METHOD: We consecutively included the severe OPLL patients with continuous-/mixed-type and an occupying ratio of ≥ 40%, and performed whole-exome sequencing (WES) and bioinformatic analysis. Then, a validation test was performed for candidate variations. Participants were divided into 4 groups (rapidly-growing OPLL, growing rate ≥ 2.5%/y; slow-growing, < 2.5%/y; uncertain; and control). RESULTS WES was performed on samples from 74 patients with OPLL (rapidly-growing, 33 patients; slow-growing, 37; and uncertain, 4) with 26 healthy controls. Analysis of 100 participants identified a newly implicated SNV and 4candidate genes based on GVB. The GVB of CYP4B1 showed a more deleterious score in the OPLL than the control group. Comparison between the rapidly growing OPLL and control groups revealed seven newly identified SNVs. We found significant association for 2 rare missense variants; rs121502220 (odds ratio [OR] = infinite; minor allele frequency [MAF] = 0.034) in NLRP1 and rs13980628 (OR= infinite; MAF = 0.032) in SSH2. The 3 genes are associated with inflammation control and arthritis, and SSH2 and NLRP1 are also related to vitamin D modulation. CONCLUSIONS Identification of unique variants in novel genes such as CYP4B1 gene may induce the development of OPLL. In subgroup analysis, NLRP1 and SSH2 genes coding inflammation molecules may related with rapidly-growing OPLL.
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Affiliation(s)
- Chang-Hyun Lee
- Department of Neurosurgery, Seoul National University Hospital, Seoul; Department of Neurosurgery, Seoul National University Bundang Hospital, Seongnam
| | - Ki Tae Kim
- Seoul National University Biomedical Informatics (SNUBI), Division of Biomedical Informatics, Seoul National University College of Medicine, Seoul; Department of Laboratory Medicine, Korea University Anam Hospital, Seoul
| | - Chi Heon Kim
- Department of Neurosurgery, Seoul National University Hospital, Seoul; Department of Neurosurgery, Seoul National University College of Medicine
| | - Eun Young Lee
- Department of Internal Medicine, Seoul National University Hospital, Seoul National University College of Medicine
| | - Sang Gu Lee
- Department of Neurosurgery, Gil Medical Center, Gachon University College of Medicine, Seongnam
| | - Myung-Eui Seo
- Seoul National University Biomedical Informatics (SNUBI), Division of Biomedical Informatics, Seoul National University College of Medicine, Seoul
| | - Ju Han Kim
- Seoul National University Biomedical Informatics (SNUBI), Division of Biomedical Informatics, Seoul National University College of Medicine, Seoul
| | - Chun Kee Chung
- Department of Neurosurgery, Seoul National University Hospital, Seoul; Department of Neurosurgery, Seoul National University College of Medicine; Department of Brain and Cognitive Sciences, Seoul National University College of Natural Sciences, Seoul, The Republic of Korea.
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41
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Tsu BV, Fay EJ, Nguyen KT, Corley MR, Hosuru B, Dominguez VA, Daugherty MD. Running With Scissors: Evolutionary Conflicts Between Viral Proteases and the Host Immune System. Front Immunol 2021; 12:769543. [PMID: 34790204 PMCID: PMC8591160 DOI: 10.3389/fimmu.2021.769543] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2021] [Accepted: 10/08/2021] [Indexed: 12/28/2022] Open
Abstract
Many pathogens encode proteases that serve to antagonize the host immune system. In particular, viruses with a positive-sense single-stranded RNA genome [(+)ssRNA], including picornaviruses, flaviviruses, and coronaviruses, encode proteases that are not only required for processing viral polyproteins into functional units but also manipulate crucial host cellular processes through their proteolytic activity. Because these proteases must cleave numerous polyprotein sites as well as diverse host targets, evolution of these viral proteases is expected to be highly constrained. However, despite this strong evolutionary constraint, mounting evidence suggests that viral proteases such as picornavirus 3C, flavivirus NS3, and coronavirus 3CL, are engaged in molecular 'arms races' with their targeted host factors, resulting in host- and virus-specific determinants of protease cleavage. In cases where protease-mediated cleavage results in host immune inactivation, recurrent host gene evolution can result in avoidance of cleavage by viral proteases. In other cases, such as recently described examples in NLRP1 and CARD8, hosts have evolved 'tripwire' sequences that mimic protease cleavage sites and activate an immune response upon cleavage. In both cases, host evolution may be responsible for driving viral protease evolution, helping explain why viral proteases and polyprotein sites are divergent among related viruses despite such strong evolutionary constraint. Importantly, these evolutionary conflicts result in diverse protease-host interactions even within closely related host and viral species, thereby contributing to host range, zoonotic potential, and pathogenicity of viral infection. Such examples highlight the importance of examining viral protease-host interactions through an evolutionary lens.
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Affiliation(s)
| | | | | | | | | | | | - Matthew D. Daugherty
- Division of Biological Sciences, University of California, San Diego, CA, United States
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Viana F, Peringathara SS, Rizvi A, Schroeder GN. Host manipulation by bacterial type III and type IV secretion system effector proteases. Cell Microbiol 2021; 23:e13384. [PMID: 34392594 PMCID: PMC11475232 DOI: 10.1111/cmi.13384] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2021] [Revised: 07/28/2021] [Accepted: 07/30/2021] [Indexed: 01/08/2023]
Abstract
Proteases are powerful enzymes, which cleave peptide bonds, leading most of the time to irreversible fragmentation or degradation of their substrates. Therefore they control many critical cell fate decisions in eukaryotes. Bacterial pathogens exploit this power and deliver protease effectors through specialised secretion systems into host cells. Research over the past years revealed that the functions of protease effectors during infection are diverse, reflecting the lifestyles and adaptations to specific hosts; however, only a small number of peptidase families seem to have given rise to most of these protease virulence factors by the evolution of different substrate-binding specificities, intracellular activation and subcellular targeting mechanisms. Here, we review our current knowledge about the enzymology and function of protease effectors, which Gram-negative bacterial pathogens translocate via type III and IV secretion systems to irreversibly manipulate host processes. We highlight emerging concepts such as signalling by protease cleavage products and effector-triggered immunity, which host cells employ to detect and defend themselves against a protease attack. TAKE AWAY: Proteases irreversibly cleave proteins to control critical cell fate decisions. Gram-negative bacteria use type III and IV secretion systems to inject effectors. Protease effectors are integral weapons for the manipulation of host processes. Effectors evolved from few peptidase families to target diverse substrates. Effector-triggered immunity upon proteolytic attack emerges as host defence.
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Affiliation(s)
- Flávia Viana
- Wellcome‐Wolfson Institute for Experimental Medicine, School of Medicine, Dentistry and Biomedical SciencesQueen's University BelfastBelfast, Northern IrelandUK
| | - Shruthi Sachidanandan Peringathara
- Wellcome‐Wolfson Institute for Experimental Medicine, School of Medicine, Dentistry and Biomedical SciencesQueen's University BelfastBelfast, Northern IrelandUK
| | - Arshad Rizvi
- Wellcome‐Wolfson Institute for Experimental Medicine, School of Medicine, Dentistry and Biomedical SciencesQueen's University BelfastBelfast, Northern IrelandUK
| | - Gunnar N. Schroeder
- Wellcome‐Wolfson Institute for Experimental Medicine, School of Medicine, Dentistry and Biomedical SciencesQueen's University BelfastBelfast, Northern IrelandUK
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Burdette BE, Esparza AN, Zhu H, Wang S. Gasdermin D in pyroptosis. Acta Pharm Sin B 2021; 11:2768-2782. [PMID: 34589396 PMCID: PMC8463274 DOI: 10.1016/j.apsb.2021.02.006] [Citation(s) in RCA: 397] [Impact Index Per Article: 99.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2020] [Revised: 11/29/2020] [Accepted: 12/01/2020] [Indexed: 02/07/2023] Open
Abstract
Pyroptosis is the process of inflammatory cell death. The primary function of pyroptosis is to induce strong inflammatory responses that defend the host against microbe infection. Excessive pyroptosis, however, leads to several inflammatory diseases, including sepsis and autoimmune disorders. Pyroptosis can be canonical or noncanonical. Upon microbe infection, the canonical pathway responds to pathogen-associated molecular patterns (PAMPs) and damage-associated molecular patterns (DAMPs), while the noncanonical pathway responds to intracellular lipopolysaccharides (LPS) of Gram-negative bacteria. The last step of pyroptosis requires the cleavage of gasdermin D (GsdmD) at D275 (numbering after human GSDMD) into N- and C-termini by caspase 1 in the canonical pathway and caspase 4/5/11 (caspase 4/5 in humans, caspase 11 in mice) in the noncanonical pathway. Upon cleavage, the N-terminus of GsdmD (GsdmD-N) forms a transmembrane pore that releases cytokines such as IL-1β and IL-18 and disturbs the regulation of ions and water, eventually resulting in strong inflammation and cell death. Since GsdmD is the effector of pyroptosis, promising inhibitors of GsdmD have been developed for inflammatory diseases. This review will focus on the roles of GsdmD during pyroptosis and in diseases.
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Key Words
- 7DG, 7-desacetoxy-6,7-dehydrogedunin
- ADRA2B, α-2B adrenergic receptor
- AIM, absent in melanoma
- ASC, associated speck-like protein
- Ac-FLTD-CMK, acetyl-FLTD-chloromethylketone
- BMDM, bone marrow-derived macrophages
- CARD, caspase activation
- CD, Crohn’s disease
- CTM, Chinese traditional medicine
- CTSG, cathepsin G
- Caspase
- DAMP, damage-associated molecular pattern
- DFNA5, deafness autosomal dominant 5
- DFNB59, deafness autosomal recessive type 59
- DKD, diabetic kidney disease
- DMF, dimethyl fumarate
- Damage-associated molecular patterns (DAMPs)
- ELANE, neutrophil expressed elastase
- ESCRT, endosomal sorting complexes required for transport
- FADD, FAS-associated death domain
- FDA, U.S. Food and Drug Administration
- FIIND, function to find domain
- FMF, familial Mediterranean fever
- GI, gastrointestinal
- GPX, glutathione peroxidase
- Gasdermin
- GsdmA/B/C/D/E, gasdermin A/B/C/D/E
- HAMP, homeostasis altering molecular pattern
- HIN, hematopoietic expression, interferon-inducible nature, and nuclear localization
- HIV, human immunodeficiency virus
- HMGB1, high mobility group protein B1
- IBD, inflammatory bowel disease
- IFN, interferon
- ITPR1, inositol 1,4,5-trisphosphate receptor type 1
- Inflammasome
- Inflammation
- LPS, lipopolysaccharide
- LRR, leucine-rich repeat
- MAP3K7, mitogen-activated protein kinase kinase kinase 7
- MCC950, N-[[(1,2,3,5,6,7-hexahydro-s-indacen-4-yl)amino]carbonyl]-4-(1-hydroxy-1-methylethyl)-2-furansulfonamide
- NAIP, NLR family apoptosis inhibitory protein
- NBD, nucleotide-binding domain
- NEK7, NIMA-related kinase 7
- NET, neutrophil extracellular trap
- NIK, NF-κB inducing kinase
- NLR, NOD-like receptor
- NLRP, NLR family pyrin domain containing
- NSAID, non-steroidal anti-inflammatory drug
- NSCLC, non-small cell lung cancer
- NSP, neutrophil specific serine protease
- PAMP, pathogen-associated molecular pattern
- PKA, protein kinase A
- PKN1/2, protein kinase1/2
- PKR, protein kinase-R
- PRR, pattern recognition receptors
- PYD, pyrin domain
- Pathogen-associated molecular patterns (PAMPs)
- Pyroptosis
- ROS, reactive oxygen species
- STING, stimulator of interferon genes
- Sepsis
- TLR, Toll-like receptor
- UC, ulcerative colitis
- cAMP, cyclic adenosine monophosphate
- cGAS, cyclic GMP–AMP synthase
- mtDNA, mitochondrial DNA
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Affiliation(s)
- Brandon E. Burdette
- Biology Department, University of Arkansas at Little Rock, Little Rock, AR 72204, USA
| | - Ashley N. Esparza
- Biology Department, University of Arkansas at Little Rock, Little Rock, AR 72204, USA
| | - Hua Zhu
- Department of Surgery, the Ohio State University Wexner Medical Center, Columbus, OH 43210, USA
| | - Shanzhi Wang
- Biology Department, University of Arkansas at Little Rock, Little Rock, AR 72204, USA
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44
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Duxbury Z, Wu CH, Ding P. A Comparative Overview of the Intracellular Guardians of Plants and Animals: NLRs in Innate Immunity and Beyond. ANNUAL REVIEW OF PLANT BIOLOGY 2021; 72:155-184. [PMID: 33689400 DOI: 10.1146/annurev-arplant-080620-104948] [Citation(s) in RCA: 49] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Nucleotide-binding domain leucine-rich repeat receptors (NLRs) play important roles in the innate immune systems of both plants and animals. Recent breakthroughs in NLR biochemistry and biophysics have revolutionized our understanding of how NLR proteins function in plant immunity. In this review, we summarize the latest findings in plant NLR biology and draw direct comparisons to NLRs of animals. We discuss different mechanisms by which NLRs recognize their ligands in plants and animals. The discovery of plant NLR resistosomes that assemble in a comparable way to animal inflammasomes reinforces the striking similarities between the formation of plant and animal NLR complexes. Furthermore, we discuss the mechanisms by which plant NLRs mediate immune responses and draw comparisons to similar mechanisms identified in animals. Finally, we summarize the current knowledge of the complex genetic architecture formed by NLRs in plants and animals and the roles of NLRs beyond pathogen detection.
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Affiliation(s)
- Zane Duxbury
- Jealott's Hill International Research Centre, Syngenta, Bracknell RG42 6EY, United Kingdom;
| | - Chih-Hang Wu
- Institute of Plant and Microbial Biology, Academia Sinica, Taipei 11529, Taiwan;
| | - Pingtao Ding
- The Sainsbury Laboratory, University of East Anglia, Norwich NR4 7UH, United Kingdom
- Current affiliation: Institute of Biology Leiden, Leiden University, Leiden 2333 BE, The Netherlands;
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45
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Aksentijevich I, Schnappauf O. Molecular mechanisms of phenotypic variability in monogenic autoinflammatory diseases. Nat Rev Rheumatol 2021; 17:405-425. [PMID: 34035534 DOI: 10.1038/s41584-021-00614-1] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/06/2021] [Indexed: 02/08/2023]
Abstract
Monogenic autoinflammatory diseases are a group of rheumatologic disorders caused by dysregulation in the innate immune system. The molecular mechanisms of these disorders are linked to defects in inflammasome-mediated, NF-κB-mediated or interferon-mediated inflammatory signalling pathways, cytokine receptors, the actin cytoskeleton, proteasome complexes and various enzymes. As with other human disorders, disease-causing variants in a single gene can present with variable expressivity and incomplete penetrance. In some cases, pathogenic variants in the same gene can be inherited either in a recessive or dominant manner and can cause distinct and seemingly unrelated phenotypes, although they have a unifying biochemical mechanism. With an enhanced understanding of protein structure and functionality of protein domains, genotype-phenotype correlations are beginning to be unravelled. Many of the mutated proteins are primarily expressed in haematopoietic cells, and their malfunction leads to systemic inflammation. Disease presentation is also defined by a specific effect of the mutant protein in a particular cell type and, therefore, the resulting phenotype might be more deleterious in one tissue than in another. Many patients present with the expanded immunological disease continuum that includes autoinflammation, immunodeficiency, autoimmunity and atopy, which necessitate genetic testing.
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Affiliation(s)
- Ivona Aksentijevich
- Inflammatory Disease Section, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, USA.
| | - Oskar Schnappauf
- Inflammatory Disease Section, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, USA
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46
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Yu P, Zhang X, Liu N, Tang L, Peng C, Chen X. Pyroptosis: mechanisms and diseases. Signal Transduct Target Ther 2021; 6:128. [PMID: 33776057 PMCID: PMC8005494 DOI: 10.1038/s41392-021-00507-5] [Citation(s) in RCA: 1315] [Impact Index Per Article: 328.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2020] [Revised: 01/14/2021] [Accepted: 01/20/2021] [Indexed: 02/08/2023] Open
Abstract
Currently, pyroptosis has received more and more attention because of its association with innate immunity and disease. The research scope of pyroptosis has expanded with the discovery of the gasdermin family. A great deal of evidence shows that pyroptosis can affect the development of tumors. The relationship between pyroptosis and tumors is diverse in different tissues and genetic backgrounds. In this review, we provide basic knowledge of pyroptosis, explain the relationship between pyroptosis and tumors, and focus on the significance of pyroptosis in tumor treatment. In addition, we further summarize the possibility of pyroptosis as a potential tumor treatment strategy and describe the side effects of radiotherapy and chemotherapy caused by pyroptosis. In brief, pyroptosis is a double-edged sword for tumors. The rational use of this dual effect will help us further explore the formation and development of tumors, and provide ideas for patients to develop new drugs based on pyroptosis.
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Affiliation(s)
- Pian Yu
- The Department of Dermatology, Xiangya Hospital, Central South University, Changsha, Hunan, China
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Changsha, Hunan, China
- Hunan Key Laboratory of Skin Cancer and Psoriasis, Xiangya Hospital, Changsha, Hunan, China
- Hunan Engineering Research Center of Skin Health and Disease, Xiangya Hospital, Changsha, Hunan, China
- Xiangya Clinical Research Center for Cancer Immunotherapy, Central South University, Changsha, Hunan, China
| | - Xu Zhang
- The Department of Dermatology, Xiangya Hospital, Central South University, Changsha, Hunan, China
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Changsha, Hunan, China
- Hunan Key Laboratory of Skin Cancer and Psoriasis, Xiangya Hospital, Changsha, Hunan, China
- Hunan Engineering Research Center of Skin Health and Disease, Xiangya Hospital, Changsha, Hunan, China
- Xiangya Clinical Research Center for Cancer Immunotherapy, Central South University, Changsha, Hunan, China
| | - Nian Liu
- The Department of Dermatology, Xiangya Hospital, Central South University, Changsha, Hunan, China
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Changsha, Hunan, China
- Hunan Key Laboratory of Skin Cancer and Psoriasis, Xiangya Hospital, Changsha, Hunan, China
- Hunan Engineering Research Center of Skin Health and Disease, Xiangya Hospital, Changsha, Hunan, China
- Xiangya Clinical Research Center for Cancer Immunotherapy, Central South University, Changsha, Hunan, China
| | - Ling Tang
- The Department of Dermatology, Xiangya Hospital, Central South University, Changsha, Hunan, China
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Changsha, Hunan, China
- Hunan Key Laboratory of Skin Cancer and Psoriasis, Xiangya Hospital, Changsha, Hunan, China
- Hunan Engineering Research Center of Skin Health and Disease, Xiangya Hospital, Changsha, Hunan, China
- Xiangya Clinical Research Center for Cancer Immunotherapy, Central South University, Changsha, Hunan, China
| | - Cong Peng
- The Department of Dermatology, Xiangya Hospital, Central South University, Changsha, Hunan, China.
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Changsha, Hunan, China.
- Hunan Key Laboratory of Skin Cancer and Psoriasis, Xiangya Hospital, Changsha, Hunan, China.
- Hunan Engineering Research Center of Skin Health and Disease, Xiangya Hospital, Changsha, Hunan, China.
- Xiangya Clinical Research Center for Cancer Immunotherapy, Central South University, Changsha, Hunan, China.
| | - Xiang Chen
- The Department of Dermatology, Xiangya Hospital, Central South University, Changsha, Hunan, China.
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Changsha, Hunan, China.
- Hunan Key Laboratory of Skin Cancer and Psoriasis, Xiangya Hospital, Changsha, Hunan, China.
- Hunan Engineering Research Center of Skin Health and Disease, Xiangya Hospital, Changsha, Hunan, China.
- Xiangya Clinical Research Center for Cancer Immunotherapy, Central South University, Changsha, Hunan, China.
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47
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Abstract
Recent studies provide evidence that two chemically and mechanistically distinct signals activate the human NLRP1 inflammasome, challenging the concept that it-like other mammalian inflammasomes characterized thus far-evolved to detect and respond to a single danger-associated molecular pattern.
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Affiliation(s)
- Daniel A Bachovchin
- Tri-Institutional PhD Program in Chemical Biology, Memorial Sloan Kettering Cancer Center, New York, New York 10065, USA; Chemical Biology Program, Memorial Sloan Kettering Cancer Center, New York, New York 10065, USA; Pharmacology Program of the Weill Cornell Graduate School of Medical Sciences, Memorial Sloan Kettering Cancer Center, New York, New York 10065, USA.
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48
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Xu Y, Chen F. Acid-Sensing Ion Channel-1a in Articular Chondrocytes and Synovial Fibroblasts: A Novel Therapeutic Target for Rheumatoid Arthritis. Front Immunol 2021; 11:580936. [PMID: 33584647 PMCID: PMC7876322 DOI: 10.3389/fimmu.2020.580936] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Accepted: 12/14/2020] [Indexed: 12/19/2022] Open
Abstract
Acid-sensing ion channel 1a (ASIC1a) is a member of the extracellular H+-activated cation channel family. Emerging evidence has suggested that ASIC1a plays a crucial role in the pathogenesis of rheumatoid arthritis (RA). Specifically, ASIC1a could promote inflammation, synovial hyperplasia, articular cartilage, and bone destruction; these lead to the progression of RA, a chronic autoimmune disease characterized by chronic synovial inflammation and extra-articular lesions. In this review, we provided a brief overview of the molecular properties of ASIC1a, including the basic biological characteristics, tissue and cell distribution, channel blocker, and factors influencing the expression and function, and focused on the potential therapeutic targets of ASIC1a in RA and possible mechanisms of blocking ASIC1a to improve RA symptoms, such as regulation of apoptosis, autophagy, pyroptosis, and necroptosis of articular cartilage, and synovial inflammation and invasion of fibroblast-like cells in synovial tissue.
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Affiliation(s)
- Yayun Xu
- Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, Hefei, China.,The Key Laboratory of Major Autoimmune Diseases of Anhui Province, Anhui Institute of Innovative Drugs, School of Pharmacy, Anhui Medical University, Hefei, China.,The Key Laboratory of Anti-inflammatory and Immune Medicines, Ministry of Education, Hefei, China
| | - Feihu Chen
- Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, Hefei, China.,The Key Laboratory of Major Autoimmune Diseases of Anhui Province, Anhui Institute of Innovative Drugs, School of Pharmacy, Anhui Medical University, Hefei, China.,The Key Laboratory of Anti-inflammatory and Immune Medicines, Ministry of Education, Hefei, China
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49
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Jing W, Lo Pilato J, Kay C, Man SM. Activation mechanisms of inflammasomes by bacterial toxins. Cell Microbiol 2021; 23:e13309. [PMID: 33426791 DOI: 10.1111/cmi.13309] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2020] [Revised: 11/16/2020] [Accepted: 12/12/2020] [Indexed: 12/13/2022]
Abstract
Inflammasomes are cytosolic innate immune complexes, which assemble in mammalian cells in response to microbial components and endogenous danger signals. A major family of inflammasome activators is bacterial toxins. Inflammasome sensor proteins, such as the nucleotide-binding oligomerisation domain-like receptor (NLR) family members NLRP1b and NLRP3, and the tripartite motif family member Pyrin+ efflux triggered by pore-forming toxins or by other toxin-induced homeostasis-altering events such as lysosomal rupture. Pyrin senses perturbation of host cell functions induced by certain enzymatic toxins resulting in impairment of RhoA GTPase activity. Assembly of the inflammasome complex activates the cysteine protease caspase-1, leading to the proteolytic cleavage of the proinflammatory cytokines IL-1β and IL-18, and the pore-forming protein gasdermin D causing pyroptosis. In this review, we discuss the latest progress in our understanding on the activation mechanisms of inflammasome complexes by bacterial toxins and effector proteins and explore avenues for future research into the relationships between inflammasomes and bacterial toxins.
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Affiliation(s)
- Weidong Jing
- Department of Immunology and Infectious Disease, The John Curtin School of Medical Research, The Australian National University, Canberra, Australian Capital Territory, Australia
| | - Jordan Lo Pilato
- Department of Immunology and Infectious Disease, The John Curtin School of Medical Research, The Australian National University, Canberra, Australian Capital Territory, Australia
| | - Callum Kay
- Department of Immunology and Infectious Disease, The John Curtin School of Medical Research, The Australian National University, Canberra, Australian Capital Territory, Australia
| | - Si Ming Man
- Department of Immunology and Infectious Disease, The John Curtin School of Medical Research, The Australian National University, Canberra, Australian Capital Territory, Australia
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50
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Tsu BV, Beierschmitt C, Ryan AP, Agarwal R, Mitchell PS, Daugherty MD. Diverse viral proteases activate the NLRP1 inflammasome. eLife 2021; 10:60609. [PMID: 33410748 PMCID: PMC7857732 DOI: 10.7554/elife.60609] [Citation(s) in RCA: 116] [Impact Index Per Article: 29.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Accepted: 01/06/2021] [Indexed: 12/29/2022] Open
Abstract
The NLRP1 inflammasome is a multiprotein complex that is a potent activator of inflammation. Mouse NLRP1B can be activated through proteolytic cleavage by the bacterial Lethal Toxin (LeTx) protease, resulting in degradation of the N-terminal domains of NLRP1B and liberation of the bioactive C-terminal domain, which includes the caspase activation and recruitment domain (CARD). However, natural pathogen-derived effectors that can activate human NLRP1 have remained unknown. Here, we use an evolutionary model to identify several proteases from diverse picornaviruses that cleave human NLRP1 within a rapidly evolving region of the protein, leading to host-specific and virus-specific activation of the NLRP1 inflammasome. Our work demonstrates that NLRP1 acts as a 'tripwire' to recognize the enzymatic function of a wide range of viral proteases and suggests that host mimicry of viral polyprotein cleavage sites can be an evolutionary strategy to activate a robust inflammatory immune response. The immune system recognizes disease-causing microbes, such as bacteria and viruses, and removes them from the body before they can cause harm. When the immune system first detects these foreign invaders, a multi-part structure known as the inflammasome launches an inflammatory response to help fight the microbes off. Several sensor proteins can activate the inflammasome, including one in mice called NLRP1B. This protein has evolved a specialized site that can be cut by a bacterial toxin. Once cleaved, this region acts like a biological tripwire and sparks NLRP1B into action, allowing the sensor to activate the inflammasome system. Humans have a similar protein called NLRP1, but it is unclear whether this protein has also evolved a tripwire region that can sense microbial proteins. To answer this question, Tsu, Beierschmitt et al. set out to find whether NLRP1 can be activated by viruses in the Picornaviridae family, which are responsible for diseases like polio, hepatitis A, and the common cold. This revealed that NLRP1 contains a cleavage site for enzymes produced by some, but not all, of the viruses in the picornavirus family. Further experiments confirmed that when a picornavirus enzyme cuts through this region during a viral infection, it triggers NLRP1 to activate the inflammasome and initiate an immune response. The enzymes from different viruses were also found to cleave human NLRP1 at different sites, and the protein’s susceptibility to cleavage varied between different animal species. For instance, Tsu, Beierschmitt et al. discovered that NLRP1B in mice is also able to sense picornaviruses, and that different enzymes activate and cleave NLRP1B and NLRP1 to varying degrees: this affected how well the two proteins are expected to be able to sense specific viral infections. This variation suggests that there is an ongoing evolutionary arms-race between viral proteins and the immune system: as viral proteins change and new ones emerge, NLRP1 rapidly evolves new tripwire sites that allow it to sense the infection and launch an inflammatory response. What happens when NLRP1B activates the inflammasome during a viral infection is still an open question. The discovery that mouse NLRP1B shares features with human NLRP1 could allow the development of animal models to study the role of the tripwire in antiviral defenses and the overactive inflammation associated with some viral infections. Understanding the types of viruses that activate the NLRP1 inflammasome, and the outcomes of the resulting immune response, may have implications for future treatments of viral infections.
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Affiliation(s)
- Brian V Tsu
- Division of Biological Sciences, University of California San Diego, San Diego, United States
| | | | - Andrew P Ryan
- Division of Biological Sciences, University of California San Diego, San Diego, United States
| | - Rimjhim Agarwal
- Division of Immunology & Pathogenesis, University of California Berkeley, Berkeley, United States
| | - Patrick S Mitchell
- Division of Immunology & Pathogenesis, University of California Berkeley, Berkeley, United States.,Department of Microbiology, University of Washington, Seattle, United States
| | - Matthew D Daugherty
- Division of Biological Sciences, University of California San Diego, San Diego, United States
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