51
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Tsukidate T, Hespen CW, Hang HC. Small molecule modulators of immune pattern recognition receptors. RSC Chem Biol 2023; 4:1014-1036. [PMID: 38033733 PMCID: PMC10685800 DOI: 10.1039/d3cb00096f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Accepted: 10/03/2023] [Indexed: 12/02/2023] Open
Abstract
Pattern recognition receptors (PRRs) represent a re-emerging class of therapeutic targets for vaccine adjuvants, inflammatory diseases and cancer. In this review article, we summarize exciting developments in discovery and characterization of small molecule PRR modulators, focusing on Toll-like receptors (TLRs), NOD-like receptors (NLRs) and the cGAS-STING pathway. We also highlight PRRs that are currently lacking small molecule modulators and opportunities for chemical biology and therapeutic discovery.
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Affiliation(s)
- Taku Tsukidate
- Laboratory of Chemical Biology and Microbial Pathogenesis, The Rockefeller University, New York New York 10065 USA
| | - Charles W Hespen
- Laboratory of Chemical Biology and Microbial Pathogenesis, The Rockefeller University, New York New York 10065 USA
| | - Howard C Hang
- Laboratory of Chemical Biology and Microbial Pathogenesis, The Rockefeller University, New York New York 10065 USA
- Department of Immunology and Microbiology and Department of Chemistry, Scripps Research, La Jolla California 92037 USA
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52
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Rodriguez SMY, Petrilli V. [The NLRP1 inflammasome is a cytosolic sensor of virus]. Med Sci (Paris) 2023; 39:893-895. [PMID: 38018936 DOI: 10.1051/medsci/2023127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2023] Open
Affiliation(s)
| | - Virginie Petrilli
- Cancer Research Centre of Lyon, Inserm 1052, CNRS 5286, centre Léon Bérard, université de Lyon, université Claude Bernard Lyon 1, Lyon, France
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53
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Peng T, Zhang C, Chen WJ, Zhao XF, Wu WB, Yang WJ, Liang RJ. Pyroptosis: the dawn of a new era in endometrial cancer treatment. Front Oncol 2023; 13:1277639. [PMID: 37965452 PMCID: PMC10642841 DOI: 10.3389/fonc.2023.1277639] [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: 08/15/2023] [Accepted: 10/12/2023] [Indexed: 11/16/2023] Open
Abstract
Endometrial cancer (EC) is a malignancy of the inner epithelial lining of the uterus. While early-stage EC is often curable through surgery, the management of advanced, recurrent and metastatic EC poses significant challenges and is associated with a poor prognosis. Pyroptosis, an emerging form of programmed cell death, is characterized by the cleavage of gasdermin proteins, inducing the formation of extensive gasdermin pores in the cell membrane and the leakage of interleukin-1β (IL-1β) and interleukin-18 (IL-18), consequently causing cell swelling, lysis and death. It has been found to be implicated in the occurrence and progression of almost all tumors. Recent studies have demonstrated that regulating tumor cells pyroptosis can exploit synergies function with traditional tumor treatments. This paper provides an overview of the research progress made in molecular mechanisms of pyroptosis. It then discusses the role of pyroptosis and its components in initiation and progression of endometrial cancer, emphasizing recent insights into the underlying mechanisms and highlighting unresolved questions. Furthermore, it explores the potential value of pyroptosis in the treatment of endometrial cancer, considering its current application in tumor radiotherapy, chemotherapy, targeted therapy and immunotherapy.
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Affiliation(s)
- Tian Peng
- The First School of Clinical Medicine, Zhejiang Chinese Medical University, Hangzhou, China
| | - Chi Zhang
- Sir Run Run Shaw Hospital, Zhejiang University, Hangzhou, China
| | - Wen-Jun Chen
- School of Nursing, Hangzhou Medical College, Hangzhou, Zhejiang, China
- Department of Gynaecology, The First Affiliated Hospital of Zhejiang Chinese Medical University (Zhejiang Provincial Hospital of Traditional Chinese Medicine), Hangzhou, Zhejiang, China
| | - Xue-Fei Zhao
- The First School of Clinical Medicine, Zhejiang Chinese Medical University, Hangzhou, China
| | - Wei-Bo Wu
- The First School of Clinical Medicine, Zhejiang Chinese Medical University, Hangzhou, China
| | - Wei-Ji Yang
- The First School of Clinical Medicine, Zhejiang Chinese Medical University, Hangzhou, China
| | - Ruo-Jia Liang
- The First School of Clinical Medicine, Zhejiang Chinese Medical University, Hangzhou, China
- Department of Gynaecology, The First Affiliated Hospital of Zhejiang Chinese Medical University (Zhejiang Provincial Hospital of Traditional Chinese Medicine), Hangzhou, Zhejiang, China
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54
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Kroken AR, Klein KA, Mitchell PS, Nieto V, Jedel EJ, Evans DJ, Fleiszig SMJ. Intracellular replication of Pseudomonas aeruginosa in epithelial cells requires suppression of the caspase-4 inflammasome. mSphere 2023; 8:e0035123. [PMID: 37589460 PMCID: PMC10597407 DOI: 10.1128/msphere.00351-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Accepted: 06/30/2023] [Indexed: 08/18/2023] Open
Abstract
Pathogenesis of Pseudomonas aeruginosa infections can include bacterial survival inside epithelial cells. Previously, we showed that this involves multiple roles played by the type three secretion system (T3SS), and specifically the effector ExoS. This includes ExoS-dependent inhibition of a lytic host cell response that subsequently enables intracellular replication. Here, we studied the underlying cell death response to intracellular P. aeruginosa, comparing wild-type to T3SS mutants varying in capacity to induce cell death and that localize to different intracellular compartments. Results showed that corneal epithelial cell death induced by intracellular P. aeruginosa lacking the T3SS, which remains in vacuoles, correlated with the activation of nuclear factor-κB as measured by p65 relocalization and tumor necrosis factor alpha transcription and secretion. Deletion of caspase-4 through CRISPR-Cas9 mutagenesis delayed cell death caused by these intracellular T3SS mutants. Caspase-4 deletion also countered more rapid cell death caused by T3SS effector-null mutants still expressing the T3SS apparatus that traffic to the host cell cytoplasm, and in doing so rescued intracellular replication normally dependent on ExoS. While HeLa cells lacked a lytic death response to T3SS mutants, it was found to be enabled by interferon gamma treatment. Together, these results show that epithelial cells can activate the noncanonical inflammasome pathway to limit proliferation of intracellular P. aeruginosa, not fully dependent on bacterially driven vacuole escape. Since ExoS inhibits the lytic response, the data implicate targeting of caspase-4, an intracellular pattern recognition receptor, as another contributor to the role of ExoS in the intracellular lifestyle of P. aeruginosa. IMPORTANCE Pseudomonas aeruginosa can exhibit an intracellular lifestyle within epithelial cells in vivo and in vitro. The type three secretion system (T3SS) effector ExoS contributes via multiple mechanisms, including extending the life of invaded host cells. Here, we aimed to understand the underlying cell death inhibited by ExoS when P. aeruginosa is intracellular. Results showed that intracellular P. aeruginosa lacking T3SS effectors could elicit rapid cell lysis via the noncanonical inflammasome pathway. Caspase-4 contributed to cell lysis even when the intracellular bacteria lacked the entire T33S and were consequently unable to escape vacuoles, representing a naturally occurring subpopulation during wild-type infection. Together, the data show the caspase-4 inflammasome as an epithelial cell defense against intracellular P. aeruginosa, and implicate its targeting as another mechanism by which ExoS preserves the host cell replicative niche.
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Affiliation(s)
- Abby R. Kroken
- Department of Microbiology and Immunology, Loyola University Chicago, Maywood, Illinois, USA
- Herbert Wertheim School of Optometry & Vision Science, University of California, Berkeley, California, USA
| | - Keith A. Klein
- Department of Microbiology and Immunology, Loyola University Chicago, Maywood, Illinois, USA
| | - Patrick S. Mitchell
- Department of Microbiology, University of Washington, Seattle, Washington, USA
| | - Vincent Nieto
- Herbert Wertheim School of Optometry & Vision Science, University of California, Berkeley, California, USA
| | - Eric J. Jedel
- Herbert Wertheim School of Optometry & Vision Science, University of California, Berkeley, California, USA
| | - David J. Evans
- Herbert Wertheim School of Optometry & Vision Science, University of California, Berkeley, California, USA
- College of Pharmacy, Touro University California, Vallejo, California, USA
| | - Suzanne M. J. Fleiszig
- Herbert Wertheim School of Optometry & Vision Science, University of California, Berkeley, California, USA
- Graduate Groups in Vision Sciences, Microbiology, and Infectious Diseases & Immunity, University of California, Berkeley, California, USA
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55
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Rodríguez‐Ruiz L, Lozano‐Gil JM, Naranjo‐Sánchez E, Martínez‐Balsalobre E, Martínez‐López A, Lachaud C, Blanquer M, Phung TK, García‐Moreno D, Cayuela ML, Tyrkalska SD, Pérez‐Oliva AB, Mulero V. ZAKα/P38 kinase signaling pathway regulates hematopoiesis by activating the NLRP1 inflammasome. EMBO Mol Med 2023; 15:e18142. [PMID: 37675820 PMCID: PMC10565642 DOI: 10.15252/emmm.202318142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2023] [Revised: 08/16/2023] [Accepted: 08/22/2023] [Indexed: 09/08/2023] Open
Abstract
Chronic inflammatory diseases are associated with hematopoietic lineage bias, including neutrophilia and anemia. We have recently identified that the canonical inflammasome mediates the cleavage of the master erythroid transcription factor GATA1 in hematopoietic stem and progenitor cells (HSPCs). We report here that genetic inhibition of Nlrp1 resulted in reduced number of neutrophils and increased erythrocyte counts in zebrafish larvae. We also found that the NLRP1 inflammasome in human cells was inhibited by LRRFIP1 and FLII, independently of DPP9, and both inhibitors regulated hematopoiesis. Mechanistically, erythroid differentiation resulted in ribosomal stress-induced activation of the ZAKα/P38 kinase axis which, in turn, phosphorylated and promoted the assembly of NLRP1 in both zebrafish and human. Finally, inhibition of Zaka with the FDA/EMA-approved drug Nilotinib alleviated neutrophilia in a zebrafish model of neutrophilic inflammation and promoted erythroid differentiation and GATA1 accumulation in K562 cells. In conclusion, our results reveal that the NLRP1 inflammasome regulates hematopoiesis and pave the way to develop novel therapeutic strategies for the treatment of hematopoietic alterations associated with chronic inflammatory and rare diseases.
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Affiliation(s)
- Lola Rodríguez‐Ruiz
- Departmento de Biología Celular e Histología, Facultad de BiologíaUniversidad de MurciaMurciaSpain
- Instituto Murciano de Investigación Biosanitaria (IMIB)‐Pascual ParrillaMurciaSpain
- Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER)Instituto de Salud Carlos IIIMadridSpain
| | - Juan M Lozano‐Gil
- Departmento de Biología Celular e Histología, Facultad de BiologíaUniversidad de MurciaMurciaSpain
- Instituto Murciano de Investigación Biosanitaria (IMIB)‐Pascual ParrillaMurciaSpain
- Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER)Instituto de Salud Carlos IIIMadridSpain
| | - Elena Naranjo‐Sánchez
- Departmento de Biología Celular e Histología, Facultad de BiologíaUniversidad de MurciaMurciaSpain
- Instituto Murciano de Investigación Biosanitaria (IMIB)‐Pascual ParrillaMurciaSpain
- Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER)Instituto de Salud Carlos IIIMadridSpain
- Hospital Clínico Universitario Virgen de la ArrixacaMurciaSpain
| | - Elena Martínez‐Balsalobre
- Departmento de Biología Celular e Histología, Facultad de BiologíaUniversidad de MurciaMurciaSpain
- Instituto Murciano de Investigación Biosanitaria (IMIB)‐Pascual ParrillaMurciaSpain
- Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER)Instituto de Salud Carlos IIIMadridSpain
- Hospital Clínico Universitario Virgen de la ArrixacaMurciaSpain
| | - Alicia Martínez‐López
- Instituto Murciano de Investigación Biosanitaria (IMIB)‐Pascual ParrillaMurciaSpain
- Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER)Instituto de Salud Carlos IIIMadridSpain
| | - Christophe Lachaud
- Aix‐Marseille University, Inserm, CNRS, Institut Paoli‐Calmettes, CRCMMarseilleFrance
| | - Miguel Blanquer
- Instituto Murciano de Investigación Biosanitaria (IMIB)‐Pascual ParrillaMurciaSpain
- Hospital Clínico Universitario Virgen de la ArrixacaMurciaSpain
- Departamento de Medicina y Unidad de Terapia Celular y Trasplante Hematopoyético, Facultad de MedicinaUniversidad de MurciaMurciaSpain
| | - Toan K Phung
- MRC PPU, Sir James Black Centre, School of Life SciencesUniversity of DundeeDundeeUK
| | - Diana García‐Moreno
- Instituto Murciano de Investigación Biosanitaria (IMIB)‐Pascual ParrillaMurciaSpain
- Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER)Instituto de Salud Carlos IIIMadridSpain
| | - María L Cayuela
- Instituto Murciano de Investigación Biosanitaria (IMIB)‐Pascual ParrillaMurciaSpain
- Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER)Instituto de Salud Carlos IIIMadridSpain
- Hospital Clínico Universitario Virgen de la ArrixacaMurciaSpain
| | - Sylwia D Tyrkalska
- Departmento de Biología Celular e Histología, Facultad de BiologíaUniversidad de MurciaMurciaSpain
- Instituto Murciano de Investigación Biosanitaria (IMIB)‐Pascual ParrillaMurciaSpain
- Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER)Instituto de Salud Carlos IIIMadridSpain
| | - Ana B Pérez‐Oliva
- Instituto Murciano de Investigación Biosanitaria (IMIB)‐Pascual ParrillaMurciaSpain
| | - Victoriano Mulero
- Departmento de Biología Celular e Histología, Facultad de BiologíaUniversidad de MurciaMurciaSpain
- Instituto Murciano de Investigación Biosanitaria (IMIB)‐Pascual ParrillaMurciaSpain
- Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER)Instituto de Salud Carlos IIIMadridSpain
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Pinilla M, Mazars R, Vergé R, Gorse L, Paradis M, Suire B, Santoni K, Robinson KS, Toh GA, Prouvensier L, Leon-Icaza SA, Hessel A, Péricat D, Murris M, Guet-Revillet H, Henras A, Buyck J, Ravet E, Zhong FL, Cougoule C, Planès R, Meunier E. EEF2-inactivating toxins engage the NLRP1 inflammasome and promote epithelial barrier disruption. J Exp Med 2023; 220:e20230104. [PMID: 37642996 PMCID: PMC10465324 DOI: 10.1084/jem.20230104] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2023] [Revised: 06/02/2023] [Accepted: 07/14/2023] [Indexed: 08/31/2023] Open
Abstract
Human airway and corneal epithelial cells, which are critically altered during chronic infections mediated by Pseudomonas aeruginosa, specifically express the inflammasome sensor NLRP1. Here, together with a companion study, we report that the NLRP1 inflammasome detects exotoxin A (EXOA), a ribotoxin released by P. aeruginosa type 2 secretion system (T2SS), during chronic infection. Mechanistically, EXOA-driven eukaryotic elongation factor 2 (EEF2) ribosylation and covalent inactivation promote ribotoxic stress and subsequent NLRP1 inflammasome activation, a process shared with other EEF2-inactivating toxins, diphtheria toxin and cholix toxin. Biochemically, irreversible EEF2 inactivation triggers ribosome stress-associated kinases ZAKα- and P38-dependent NLRP1 phosphorylation and subsequent proteasome-driven functional degradation. Finally, cystic fibrosis cells from patients exhibit exacerbated P38 activity and hypersensitivity to EXOA-induced ribotoxic stress-dependent NLRP1 inflammasome activation, a process inhibited by the use of ZAKα inhibitors. Altogether, our results show the importance of P. aeruginosa virulence factor EXOA at promoting NLRP1-dependent epithelial damage and identify ZAKα as a critical sensor of virulence-inactivated EEF2.
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Affiliation(s)
- Miriam Pinilla
- Institute of Pharmacology and Structural Biology, University of Toulouse, CNRS, Toulouse, France
| | - Raoul Mazars
- Institute of Pharmacology and Structural Biology, University of Toulouse, CNRS, Toulouse, France
| | - Romain Vergé
- Institute of Pharmacology and Structural Biology, University of Toulouse, CNRS, Toulouse, France
| | - Leana Gorse
- Institute of Pharmacology and Structural Biology, University of Toulouse, CNRS, Toulouse, France
| | - Margaux Paradis
- Institute of Pharmacology and Structural Biology, University of Toulouse, CNRS, Toulouse, France
| | - Bastien Suire
- Institute of Pharmacology and Structural Biology, University of Toulouse, CNRS, Toulouse, France
| | - Karin Santoni
- Institute of Pharmacology and Structural Biology, University of Toulouse, CNRS, Toulouse, France
| | - Kim Samirah Robinson
- Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore, Singapore
- Skin Research Institute of Singapore, Singapore, Singapore
| | - Gee Ann Toh
- Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore, Singapore
- Skin Research Institute of Singapore, Singapore, Singapore
| | - Laure Prouvensier
- UFR Medicine and Pharmacy, INSERM U1070, University of Poitiers, Poitiers, France
| | | | - Audrey Hessel
- Institute of Pharmacology and Structural Biology, University of Toulouse, CNRS, Toulouse, France
| | - David Péricat
- Institute of Pharmacology and Structural Biology, University of Toulouse, CNRS, Toulouse, France
| | - Marlène Murris
- Department of Pneumology, Hospital Larrey, Toulouse, France
- University Hospital of Toulouse, Toulouse, France
| | | | - Anthony Henras
- Center of Integrative Biology, University of Toulouse, CNRS, Toulouse, France
| | - Julien Buyck
- UFR Medicine and Pharmacy, INSERM U1070, University of Poitiers, Poitiers, France
| | | | - Franklin L. Zhong
- Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore, Singapore
- Skin Research Institute of Singapore, Singapore, Singapore
| | - Céline Cougoule
- Institute of Pharmacology and Structural Biology, University of Toulouse, CNRS, Toulouse, France
| | - Rémi Planès
- Institute of Pharmacology and Structural Biology, University of Toulouse, CNRS, Toulouse, France
- Invivogen, Toulouse, France
| | - Etienne Meunier
- Institute of Pharmacology and Structural Biology, University of Toulouse, CNRS, Toulouse, France
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57
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Zhang Z, Shibata T, Fujimura A, Kitaura J, Miyake K, Ohto U, Shimizu T. Structural basis for thioredoxin-mediated suppression of NLRP1 inflammasome. Nature 2023; 622:188-194. [PMID: 37704723 DOI: 10.1038/s41586-023-06532-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Accepted: 08/11/2023] [Indexed: 09/15/2023]
Abstract
Inflammasome sensors detect pathogen- and danger-associated molecular patterns and promote inflammation and pyroptosis1. NLRP1 was the first inflammasome sensor to be described, and its hyperactivation is linked to autoinflammatory disease and cancer2-6. However, the mechanism underlying the activation and regulation of NLRP1 has not been clearly elucidated4,7,8. Here we identify ubiquitously expressed endogenous thioredoxin (TRX) as a binder of NLRP1 and a suppressor of the NLRP1 inflammasome. The cryo-electron microscopy structure of human NLRP1 shows NLRP1 bound to Spodoptera frugiperda TRX. Mutagenesis studies of NLRP1 and human TRX show that TRX in the oxidized form binds to the nucleotide-binding domain subdomain of NLRP1. This observation highlights the crucial role of redox-active cysteines of TRX in NLRP1 binding. Cellular assays reveal that TRX suppresses NLRP1 inflammasome activation and thus negatively regulates NLRP1. Our data identify the TRX system as an intrinsic checkpoint for innate immunity and provide opportunities for future therapeutic intervention in NLRP1 inflammasome activation targeting this system.
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Affiliation(s)
- Zhikuan Zhang
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, Tokyo, Japan
| | - Takuma Shibata
- Division of Innate Immunity, Department of Microbiology and Immunology, The Institute of Medical Science, The University of Tokyo, Tokyo, Japan
| | - Akiko Fujimura
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, Tokyo, Japan
| | - Jiro Kitaura
- Atopy (Allergy) Research Center, Juntendo University Graduate School of Medicine, Tokyo, Japan
- Department of Science of Allergy and Inflammation, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Kensuke Miyake
- Division of Innate Immunity, Department of Microbiology and Immunology, The Institute of Medical Science, The University of Tokyo, Tokyo, Japan
| | - Umeharu Ohto
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, Tokyo, Japan.
| | - Toshiyuki Shimizu
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, Tokyo, Japan.
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58
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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: 35] [Impact Index Per Article: 35.0] [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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59
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Wang J, Hua S, Bao H, Yuan J, Zhao Y, Chen S. Pyroptosis and inflammasomes in cancer and inflammation. MedComm (Beijing) 2023; 4:e374. [PMID: 37752941 PMCID: PMC10518439 DOI: 10.1002/mco2.374] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2023] [Revised: 08/20/2023] [Accepted: 08/22/2023] [Indexed: 09/28/2023] Open
Abstract
Nonprogrammed cell death (NPCD) and programmed cell death (PCD) are two types of cell death. Cell death is significantly linked to tumor development, medication resistance, cancer recurrence, and metastatic dissemination. Therefore, a comprehensive understanding of cell death is essential for the treatment of cancer. Pyroptosis is a kind of PCD distinct from autophagy and apoptosis in terms of the structure and function of cells. The defining features of pyroptosis include the release of an inflammatory cascade reaction and the expulsion of lysosomes, inflammatory mediators, and other cellular substances from within the cell. Additionally, it displays variations in osmotic pressure both within and outside the cell. Pyroptosis, as evidenced by a growing body of research, is critical for controlling the development of inflammatory diseases and cancer. In this paper, we reviewed the current level of knowledge on the mechanism of pyroptosis and inflammasomes and their connection to cancer and inflammatory diseases. This article presents a theoretical framework for investigating the potential of therapeutic targets in cancer and inflammatory diseases, overcoming medication resistance, establishing nanomedicines associated with pyroptosis, and developing risk prediction models in refractory cancer. Given the link between pyroptosis and the emergence of cancer and inflammatory diseases, pyroptosis-targeted treatments may be a cutting-edge treatment strategy.
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Affiliation(s)
- Jie‐Lin Wang
- Department of Obstetrics and GynecologyGuangzhou Key Laboratory of Targeted Therapy for Gynecologic OncologyGuangdong Provincial Key Laboratory of Major Obstetric DiseasesThe Third Affiliated Hospital of Guangzhou Medical UniversityGuangzhouChina
- Department of Gynecologic Oncology Research OfficeGuangzhou Key Laboratory of Targeted Therapy for Gynecologic OncologyGuangdong Provincial Key Laboratory of Major Obstetric DiseasesThe Third Affiliated Hospital of Guangzhou Medical UniversityGuangzhouChina
| | - Sheng‐Ni Hua
- Department of Radiation OncologyZhuhai Peoples HospitalZhuhai Hospital Affiliated with Jinan UniversityZhuhaiChina
| | - Hai‐Juan Bao
- Department of Obstetrics and GynecologyGuangzhou Key Laboratory of Targeted Therapy for Gynecologic OncologyGuangdong Provincial Key Laboratory of Major Obstetric DiseasesThe Third Affiliated Hospital of Guangzhou Medical UniversityGuangzhouChina
- Department of Gynecologic Oncology Research OfficeGuangzhou Key Laboratory of Targeted Therapy for Gynecologic OncologyGuangdong Provincial Key Laboratory of Major Obstetric DiseasesThe Third Affiliated Hospital of Guangzhou Medical UniversityGuangzhouChina
| | - Jing Yuan
- Department of Obstetrics and GynecologyGuangzhou Key Laboratory of Targeted Therapy for Gynecologic OncologyGuangdong Provincial Key Laboratory of Major Obstetric DiseasesThe Third Affiliated Hospital of Guangzhou Medical UniversityGuangzhouChina
- Department of Gynecologic Oncology Research OfficeGuangzhou Key Laboratory of Targeted Therapy for Gynecologic OncologyGuangdong Provincial Key Laboratory of Major Obstetric DiseasesThe Third Affiliated Hospital of Guangzhou Medical UniversityGuangzhouChina
| | - Yang Zhao
- Department of Obstetrics and GynecologyGuangzhou Key Laboratory of Targeted Therapy for Gynecologic OncologyGuangdong Provincial Key Laboratory of Major Obstetric DiseasesThe Third Affiliated Hospital of Guangzhou Medical UniversityGuangzhouChina
- Department of Gynecologic Oncology Research OfficeGuangzhou Key Laboratory of Targeted Therapy for Gynecologic OncologyGuangdong Provincial Key Laboratory of Major Obstetric DiseasesThe Third Affiliated Hospital of Guangzhou Medical UniversityGuangzhouChina
| | - Shuo Chen
- Department of Obstetrics and GynecologyGuangzhou Key Laboratory of Targeted Therapy for Gynecologic OncologyGuangdong Provincial Key Laboratory of Major Obstetric DiseasesThe Third Affiliated Hospital of Guangzhou Medical UniversityGuangzhouChina
- Department of Gynecologic Oncology Research OfficeGuangzhou Key Laboratory of Targeted Therapy for Gynecologic OncologyGuangdong Provincial Key Laboratory of Major Obstetric DiseasesThe Third Affiliated Hospital of Guangzhou Medical UniversityGuangzhouChina
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60
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Guy C, Baran M, Ribó-Molina P, van den Hoogen BG, Bowie AG. Viral sensing by epithelial cells involves PKR- and caspase-3-dependent generation of gasdermin E pores. iScience 2023; 26:107698. [PMID: 37680489 PMCID: PMC10480325 DOI: 10.1016/j.isci.2023.107698] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Revised: 07/20/2023] [Accepted: 08/18/2023] [Indexed: 09/09/2023] Open
Abstract
Viral sensing in myeloid cells involves inflammasome activation leading to gasdermin pore formation, cytokine release, and cell death. However, less is known about viral sensing in barrier epithelial cells, which are critical to the innate immune response to RNA viruses. Here, we show that poly(I:C), a mimic of viral dsRNA, is sensed by NLRP1 in human bronchial epithelial cells, leading to inflammasome-dependent gasdermin D (GSDMD) pore formation via caspase-1. DsRNA also stimulated a parallel sensing pathway via PKR which activated caspase-3 to cleave gasdermin E (GSDME) to form active pores. Influenza A virus (IAV) infection of cells caused GSDME activation, cytokine release, and cell death, in a PKR-dependent but NLRP1-independent manner, involving caspase-8 and caspase-3. Suppression of GSDMD and GSDME expression increased IAV replication. These data clarify mechanisms of gasdermin cleavage in response to viral sensing and reveal that gasdermin pore formation is intrinsically antiviral in human epithelial cells.
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Affiliation(s)
- Coralie Guy
- School of Biochemistry and Immunology, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin 2, Ireland
| | - Marcin Baran
- School of Biochemistry and Immunology, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin 2, Ireland
| | - Pau Ribó-Molina
- Department of Viroscience, Erasmus Medical Center, Rotterdam, the Netherlands
| | | | - Andrew G. Bowie
- School of Biochemistry and Immunology, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin 2, Ireland
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Abstract
The immune system of multicellular organisms protects them from harmful microbes. To establish an infection in the face of host immune responses, pathogens must evolve specific strategies to target immune defense mechanisms. One such defense is the formation of intracellular protein complexes, termed inflammasomes, that are triggered by the detection of microbial components and the disruption of homeostatic processes that occur during bacterial infection. Formation of active inflammasomes initiates programmed cell death pathways via activation of inflammatory caspases and cleavage of target proteins. Inflammasome-activated cell death pathways such as pyroptosis lead to proinflammatory responses that protect the host. Bacterial infection has the capacity to influence inflammasomes in two distinct ways: activation and perturbation. In this review, we discuss how bacterial activities influence inflammasomes, and we discuss the consequences of inflammasome activation or evasion for both the host and pathogen.
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Affiliation(s)
- Beatrice I Herrmann
- Department of Pathobiology, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA; ,
- Cell and Molecular Biology Graduate Group, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - James P Grayczyk
- Department of Pathobiology, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA; ,
- Current affiliation: Oncology Discovery, Abbvie, Inc., Chicago, Illinois, USA;
| | - Igor E Brodsky
- Department of Pathobiology, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA; ,
- Cell and Molecular Biology Graduate Group, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
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62
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Slaufova M, Karakaya T, Di Filippo M, Hennig P, Beer HD. The gasdermins: a pore-forming protein family expressed in the epidermis. Front Immunol 2023; 14:1254150. [PMID: 37771587 PMCID: PMC10523161 DOI: 10.3389/fimmu.2023.1254150] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2023] [Accepted: 08/24/2023] [Indexed: 09/30/2023] Open
Abstract
Gasdermins comprise a family of pore-forming proteins, which play critical roles in (auto)inflammatory diseases and cancer. They are expressed as self-inhibited precursor proteins consisting of an aminoterminal cytotoxic effector domain (NT-GSDM) and a carboxyterminal inhibitor domain (GSDM-CT) separated by an unstructured linker region. Proteolytic processing in the linker region liberates NT-GSDM, which translocates to membranes, forms oligomers, and induces membrane permeabilization, which can disturb the cellular equilibrium that can lead to cell death. Gasdermin activation and pore formation are associated with inflammation, particularly when induced by the inflammatory protease caspase-1 upon inflammasome activation. These gasdermin pores allow the release of the pro-inflammatory cytokines interleukin(IL)-1β and IL-18 and induce a lytic type of cell death, termed pyroptosis that supports inflammation, immunity, and tissue repair. However, even at the cellular level, the consequences of gasdermin activation are diverse and range from induction of programmed cell death - pyroptosis or apoptosis - to poorly characterized protective mechanisms. The specific effects of gasdermin activation can vary between species, cell types, the membrane that is being permeabilized (plasma membrane, mitochondrial membrane, etc.), and the overall biological state of the local tissue/cells. In epithelia, gasdermins seem to play crucial roles. Keratinocytes represent the main cell type of the epidermis, which is the outermost skin layer with an essential barrier function. Compared to other tissues, keratinocytes express all members of the gasdermin family, in part in a differentiation-specific manner. That raises questions regarding the specific roles of individual GSDM family members in the skin, the mechanisms and consequences of their activation, and the potential crosstalk between them. In this review, we summarize the current knowledge about gasdermins with a focus on keratinocytes and the skin and discuss the possible roles of the different family members in immunity and disease.
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Affiliation(s)
- Marta Slaufova
- Department of Dermatology, University Hospital Zurich, Zurich, Switzerland
| | - Tugay Karakaya
- Department of Dermatology, University Hospital Zurich, Zurich, Switzerland
| | - Michela Di Filippo
- Department of Dermatology, University Hospital Zurich, Zurich, Switzerland
| | - Paulina Hennig
- Department of Dermatology, University Hospital Zurich, Zurich, Switzerland
| | - Hans-Dietmar Beer
- Department of Dermatology, University Hospital Zurich, Zurich, Switzerland
- Faculty of Medicine, University of Zurich, Zurich, Switzerland
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63
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Kunze R, Fischer S, Marti HH, Preissner KT. Brain alarm by self-extracellular nucleic acids: from neuroinflammation to neurodegeneration. J Biomed Sci 2023; 30:64. [PMID: 37550658 PMCID: PMC10405513 DOI: 10.1186/s12929-023-00954-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2023] [Accepted: 07/22/2023] [Indexed: 08/09/2023] Open
Abstract
Neurological disorders such as stroke, multiple sclerosis, as well as the neurodegenerative diseases Parkinson's or Alzheimer's disease are accompanied or even powered by danger associated molecular patterns (DAMPs), defined as endogenous molecules released from stressed or damaged tissue. Besides protein-related DAMPs or "alarmins", numerous nucleic acid DAMPs exist in body fluids, such as cell-free nuclear and mitochondrial DNA as well as different species of extracellular RNA, collectively termed as self-extracellular nucleic acids (SENAs). Among these, microRNA, long non-coding RNAs, circular RNAs and extracellular ribosomal RNA constitute the majority of RNA-based DAMPs. Upon tissue injury, necrosis or apoptosis, such SENAs are released from neuronal, immune and other cells predominantly in association with extracellular vesicles and may be translocated to target cells where they can induce intracellular regulatory pathways in gene transcription and translation. The majority of SENA-induced signaling reactions in the brain appear to be related to neuroinflammatory processes, often causally associated with the onset or progression of the respective disease. In this review, the impact of the diverse types of SENAs on neuroinflammatory and neurodegenerative diseases will be discussed. Based on the accumulating knowledge in this field, several specific antagonistic approaches are presented that could serve as therapeutic interventions to lower the pathological outcome of the indicated brain disorders.
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Affiliation(s)
- Reiner Kunze
- Institute of Physiology and Pathophysiology, Department of Cardiovascular Physiology, Ruprecht-Karls-University, Im Neuenheimer Feld 326, 69120 Heidelberg, Germany
| | - Silvia Fischer
- Department of Biochemistry, Medical School, Justus-Liebig-University, Giessen, Germany
| | - Hugo H. Marti
- Institute of Physiology and Pathophysiology, Department of Cardiovascular Physiology, Ruprecht-Karls-University, Im Neuenheimer Feld 326, 69120 Heidelberg, Germany
| | - Klaus T. Preissner
- Department of Biochemistry, Medical School, Justus-Liebig-University, Giessen, Germany
- Kerckhoff-Heart-Research-Institute, Department of Cardiology, Medical School, Justus-Liebig-University, Giessen, Germany
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64
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Shi W, Jin M, Chen H, Wu Z, Yuan L, Liang S, Wang X, Memon FU, Eldemery F, Si H, Ou C. Inflammasome activation by viral infection: mechanisms of activation and regulation. Front Microbiol 2023; 14:1247377. [PMID: 37608944 PMCID: PMC10440708 DOI: 10.3389/fmicb.2023.1247377] [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: 06/26/2023] [Accepted: 07/13/2023] [Indexed: 08/24/2023] Open
Abstract
Viral diseases are the most common problems threatening human health, livestock, and poultry industries worldwide. Viral infection is a complex and competitive dynamic biological process between a virus and a host/target cell. During viral infection, inflammasomes play important roles in the host and confer defense mechanisms against the virus. Inflammasomes are polymeric protein complexes and are considered important components of the innate immune system. These immune factors recognize the signals of cell damage or pathogenic microbial infection after activation by the canonical pathway or non-canonical pathway and transmit signals to the immune system to initiate the inflammatory responses. However, some viruses inhibit the activation of the inflammasomes in order to replicate and proliferate in the host. In recent years, the role of inflammasome activation and/or inhibition during viral infection has been increasingly recognized. Therefore, in this review, we describe the biological properties of the inflammasome associated with viral infection, discuss the potential mechanisms that activate and/or inhibit NLRP1, NLRP3, and AIM2 inflammasomes by different viruses, and summarize the reciprocal regulatory effects of viral infection on the NLRP3 inflammasome in order to explore the relationship between viral infection and inflammasomes. This review will pave the way for future studies on the activation mechanisms of inflammasomes and provide novel insights for the development of antiviral therapies.
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Affiliation(s)
- Wen Shi
- College of Animal Science and Technology, Guangxi University, Nanning, China
| | - Mengyun Jin
- College of Animal Science and Technology, Guangxi University, Nanning, China
| | - Hao Chen
- College of Animal Science and Technology, Guangxi University, Nanning, China
| | | | - Liuyang Yuan
- College of Animal Science and Technology, Guangxi University, Nanning, China
| | - Si Liang
- College of Animal Science and Technology, Guangxi University, Nanning, China
| | - Xiaohan Wang
- College of Animal Science and Technology, Guangxi University, Nanning, China
| | - Fareed Uddin Memon
- College of Animal Science and Technology, Guangxi University, Nanning, China
| | - Fatma Eldemery
- Department of Hygiene and Zoonoses, Faculty of Veterinary Medicine, Mansoura University, Mansoura, Egypt
| | - Hongbin Si
- College of Animal Science and Technology, Guangxi University, Nanning, China
- Guangxi Zhuang Autonomous Region Engineering Research Center of Veterinary Biologics, Nanning, China
- Guangxi Key Laboratory of Animal Reproduction, Breeding and Disease Control, Nanning, China
| | - Changbo Ou
- College of Animal Science and Technology, Guangxi University, Nanning, China
- Guangxi Zhuang Autonomous Region Engineering Research Center of Veterinary Biologics, Nanning, China
- Guangxi Key Laboratory of Animal Reproduction, Breeding and Disease Control, Nanning, China
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65
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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: 3] [Impact Index Per Article: 3.0] [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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66
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Deng Z, Lu L, Li B, Shi X, Jin H, Hu W. The roles of inflammasomes in cancer. Front Immunol 2023; 14:1195572. [PMID: 37497237 PMCID: PMC10366604 DOI: 10.3389/fimmu.2023.1195572] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Accepted: 06/26/2023] [Indexed: 07/28/2023] Open
Abstract
Inflammation is a key characteristic of all stages of tumor development, including tumor initiation, progression, malignant transformation, invasion, and metastasis. Inflammasomes are an important component of the inflammatory response and an indispensable part of the innate immune system. Inflammasomes regulate the nature of infiltrating immune cells by signaling the secretion of different cytokines and chemokines, thus regulating the anti-tumor immunity of the body. Inflammasome expression patterns vary across different tumor types and stages, playing different roles during tumor progression. The complex diversity of the inflammasomes is determined by both internal and external factors relating to tumor establishment and progression. Therefore, elucidating the specific effects of different inflammasomes in anti-tumor immunity is critical for promoting the discovery of inflammasome-targeting drugs. This review focuses on the structure, activation pathway, and identification methods of the NLRP3, NLRC4, NLRP1 and AIM2 inflammasomes. Herein, we also explore the role of inflammasomes in different cancers and their complex regulatory mechanisms, and discuss current and future directions for targeting inflammasomes in cancer therapy. A detailed knowledge of inflammasome function and regulation may lead to novel therapies that target the activation of inflammasomes as well as the discovery of new drug targets.
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Affiliation(s)
- Zihan Deng
- Department of Thoracic Surgery, ZhongNan Hospital of Wuhan University, Wuhan, Hubei, China
| | - Lisen Lu
- College of Biomedicine and Health and College of Life Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, China
| | - Binghui Li
- Department of Thoracic Surgery, ZhongNan Hospital of Wuhan University, Wuhan, Hubei, China
| | - Xiujuan Shi
- College of Biomedicine and Health and College of Life Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, China
| | - Honglin Jin
- College of Biomedicine and Health and College of Life Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, China
| | - Weidong Hu
- Department of Thoracic Surgery, ZhongNan Hospital of Wuhan University, Wuhan, Hubei, China
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67
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He H, Wang W, Li L, Zhang X, Shi H, Chen J, Shi D, Xue M, Feng L. Activation of the NLRP1 Inflammasome and Its Role in Transmissible Gastroenteritis Coronavirus Infection. J Virol 2023; 97:e0058923. [PMID: 37255428 PMCID: PMC10308917 DOI: 10.1128/jvi.00589-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Accepted: 05/08/2023] [Indexed: 06/01/2023] Open
Abstract
The inflammasome pathway is a critical early response mechanism of the host that detects pathogens, initiates the production of inflammatory cytokines, and recruits effector cells to the infection site. Nonetheless, the mechanism of inflammasome activation in coronavirus infection and its biological functions in host defense remain unclear. Transmissible gastroenteritis virus (TGEV), a member of the genus Alphacoronavirus, is a significant pathogen that mainly infects piglets and causes intestinal inflammation and inflammatory cell infiltration. Here, we investigated the mechanism of inflammasome activation in intestinal epithelial cells (IECs) infected with TGEV. We observed a substantial increase in interleukin 1β (IL-1β) and IL-18 levels in both IECs and TGEV-infected porcine intestinal tissues. Furthermore, TGEV infection resulted in increased activation of caspase-1 and the NLRP1 (NOD-like receptor [NLR]-containing pyrin domain [PYD]) inflammasome. Our findings revealed that TGEV infection impeded the interaction between porcine NLRP1 (pNLRP1) and porcine dipeptidyl peptidases 9 (pDPP9), yet it did not reduce the expression of pDPP9. Importantly, the ZU5 domain, not the function-to-find domain (FIIND) reported in human NLRP1, was identified as the minimal domain of pNLRP1 for pDPP9 binding. In addition, the robust type I IFN expression induced by TGEV infection also upregulated pNLRP1 expression and pNLRP1 itself acts as an interferon-stimulated gene to counteract TGEV infection. Our data demonstrate that pNLRP1 has antiviral capabilities against coronavirus infection, which highlights its potential as a novel therapeutic target for coronavirus antiviral therapy. IMPORTANCE Coronavirus primarily targets the epithelial cells of the respiratory and gastrointestinal tracts, leading to damage in both humans and animals. NLRP1 is a direct sensor for RNA virus infection which is highly expressed in epithelial barrier tissues. However, until recently, the precise molecular mechanisms underlying its activation in coronavirus infection and subsequent downstream events remained unclear. In this study, we demonstrate that the alphacoronavirus TGEV induces the production of IL-1β and IL-18 and upregulates the expression of pNLRP1. Furthermore, we found that pNLRP1 can serve as an interferon-stimulated gene (ISG) to inhibit the infection of enterovirus TGEV. Our research highlights the crucial role of NLRP1 as a regulator of innate immunity in TGEV infection and shows that it may serve as a potential therapeutic target for the treatment of coronavirus infection.
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Affiliation(s)
- Haojie He
- State Key Laboratory for Animal Disease Control and Prevention, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin, Heilongjiang, China
| | - Wenzhe Wang
- State Key Laboratory for Animal Disease Control and Prevention, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin, Heilongjiang, China
| | - Liang Li
- State Key Laboratory for Animal Disease Control and Prevention, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin, Heilongjiang, China
| | - Xin Zhang
- State Key Laboratory for Animal Disease Control and Prevention, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin, Heilongjiang, China
| | - Hongyan Shi
- State Key Laboratory for Animal Disease Control and Prevention, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin, Heilongjiang, China
| | - Jianfei Chen
- State Key Laboratory for Animal Disease Control and Prevention, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin, Heilongjiang, China
| | - Da Shi
- State Key Laboratory for Animal Disease Control and Prevention, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin, Heilongjiang, China
| | - Mei Xue
- State Key Laboratory for Animal Disease Control and Prevention, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin, Heilongjiang, China
| | - Li Feng
- State Key Laboratory for Animal Disease Control and Prevention, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin, Heilongjiang, China
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68
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Deng CH, Li TQ, Zhang W, Zhao Q, Wang Y. Targeting Inflammasome Activation in Viral Infection: A Therapeutic Solution? Viruses 2023; 15:1451. [PMID: 37515138 PMCID: PMC10384481 DOI: 10.3390/v15071451] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2023] [Revised: 06/24/2023] [Accepted: 06/26/2023] [Indexed: 07/30/2023] Open
Abstract
Inflammasome activation is exclusively involved in sensing activation of innate immunity and inflammatory response during viral infection. Accumulating evidence suggests that the manipulation of inflammasome assembly or its interaction with viral proteins are critical factors in viral pathogenesis. Results from pilot clinical trials show encouraging results of NLRP3 inflammasome suppression in reducing mortality and morbidity in SARS-CoV-2-infected patients. In this article, we summarize the up-to-date understanding of inflammasomes, including NLRP3, AIM2, NLRP1, NLRP6, and NLRC4 in various viral infections, with particular focus on RNA viruses such as SARS-CoV-2, HIV, IAV, and Zika virus and DNA viruses such as herpes simplex virus 1. We also discuss the current achievement of the mechanisms involved in viral infection-induced inflammatory response, host defense, and possible therapeutic solutions.
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Affiliation(s)
- Chuan-Han Deng
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Avenida da Universidade, Taipa, Macao 999078, China
| | - Tian-Qi Li
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Avenida da Universidade, Taipa, Macao 999078, China
| | - Wei Zhang
- State Key Laboratory of Quality Research in Chinese Medicines, Macau University of Science and Technology, Av. Wai Long, Taipa, Macao 999078, China
| | - Qi Zhao
- Cancer Centre, Institute of Translational Medicine, Faculty of Health Sciences, University of Macau, Taipa, Macau 999078, China
- MoE Frontiers Science Center for Precision Oncology, University of Macau, Avenida da Universidade, Taipa, Macao 999078, China
| | - Ying Wang
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Avenida da Universidade, Taipa, Macao 999078, China
- MoE Frontiers Science Center for Precision Oncology, University of Macau, Avenida da Universidade, Taipa, Macao 999078, China
- Department of Pharmaceutical Sciences, Faculty of Health Science, University of Macau, Avenida da Universidade, Taipa, Macao 999078, China
- Minister of Education Key Laboratory of Tumor Molecular Biology, Jinan University, Guangzhou 510632, China
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69
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Diarimalala RO, Wei Y, Hu D, Hu K. Inflammasomes during SARS-CoV-2 infection and development of their corresponding inhibitors. Front Cell Infect Microbiol 2023; 13:1218039. [PMID: 37360532 PMCID: PMC10288989 DOI: 10.3389/fcimb.2023.1218039] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2023] [Accepted: 05/26/2023] [Indexed: 06/28/2023] Open
Abstract
Corona Virus Disease 2019 (COVID-19) continues to be a burden for human health since its outbreak in Wuhan, China in December 2019. Recently, the emergence of new variants of concerns (VOCs) is challenging for vaccines and drugs efficiency. In severe cases, SARS-CoV-2 provokes inappropriate hyperinflammatory immune responses leading to acute respiratory distress syndrome (ARDS) and even death. This process is regulated by inflammasomes which are activated after binding of the viral spike (S) protein to cellular angiotensin-converting enzyme 2 (ACE2) receptor and triggers innate immune responses. Therefore, the formation of "cytokines storm" leads to tissue damage and organ failure. NOD-like receptor family pyrin domain containing 3 (NLRP3) is the best studied inflammasome known to be activated during SARS-CoV-2 infection. However, some studies suggest that SARS-CoV-2 infection is associated with other inflammasomes as well; such as NLRP1, absent in melanoma-2 (AIM-2), caspase-4 and -8 which were mostly found during dsRNA virus or bacteria infection. Multiple inflammasome inhibitors that exist for other non-infectious diseases have the potential to be used to treat severe SARS-CoV-2 complications. Some of them have showed quite encouraging results during pre- and clinical trials. Nevertheless, further studies are in need for the understanding and targeting of SARS-Cov-2-induced inflammasomes; mostly an update of its role during the new VOCs infection is necessary. Hence, this review highlights all reported inflammasomes involved in SARS-CoV-2 infection and their potential inhibitors including NLRP3- and Gasdermin D (GSDMD)-inhibitors. Further strategies such as immunomodulators and siRNA are also discussed. As highly related to COVID-19 severe cases, developing inflammasome inhibitors holds a promise to treat severe COVID-19 syndrome effectively and reduce mortality.
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70
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Fetter T, de Graaf DM, Claus I, Wenzel J. Aberrant inflammasome activation as a driving force of human autoimmune skin disease. Front Immunol 2023; 14:1190388. [PMID: 37325658 PMCID: PMC10266227 DOI: 10.3389/fimmu.2023.1190388] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Accepted: 05/09/2023] [Indexed: 06/17/2023] Open
Abstract
Autoimmune skin diseases are understood as conditions in which the adaptive immune system with autoantigen-specific T cells and autoantibody-producing B cells reacting against self-tissues plays a crucial pathogenic role. However, there is increasing evidence that inflammasomes, which are large multiprotein complexes that were first described 20 years ago, contribute to autoimmune disease progression. The inflammasome and its contribution to the bioactivation of interleukins IL-1β and IL-18 play an essential role in combating foreign pathogens or tissue damage, but may also act as a pathogenic driver of myriad chronic inflammatory diseases when dysfunctionally regulated. Inflammasomes containing the NOD-like receptor family members NLRP1 and NLRP3 as well as the AIM2-like receptor family member AIM2 have been increasingly investigated in inflammatory skin conditions. In addition to autoinflammatory diseases, which are often associated with skin involvement, the aberrant activation of the inflammasome has also been implied in autoimmune diseases that can either affect the skin besides other organs such as systemic lupus erythematosus and systemic sclerosis or are isolated to the skin in humans. The latter include, among others, the T-cell mediated disorders vitiligo, alopecia areata, lichen planus and cutaneous lupus erythematosus as well as the autoantibody-driven blistering skin disease bullous pemphigoid. Some diseases are characterized by both autoinflammatory and autoimmune responses such as the chronic inflammatory skin disease psoriasis. Further insights into inflammasome dysregulation and associated pathways as well as their role in forming adaptive immune responses in human autoimmune skin pathology could potentially offer a new field of therapeutic options in the future.
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Affiliation(s)
- Tanja Fetter
- Department of Dermatology and Allergy, University Hospital Bonn, Bonn, Germany
| | | | - Isabelle Claus
- Institute of Human Genetics, University of Bonn, School of Medicine and University Hospital Bonn, Bonn, Germany
| | - Joerg Wenzel
- Department of Dermatology and Allergy, University Hospital Bonn, Bonn, Germany
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71
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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: 96] [Impact Index Per Article: 96.0] [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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72
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Wang M, Yu F, Chang W, Zhang Y, Zhang L, Li P. Inflammasomes: a rising star on the horizon of COVID-19 pathophysiology. Front Immunol 2023; 14:1185233. [PMID: 37251383 PMCID: PMC10213254 DOI: 10.3389/fimmu.2023.1185233] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2023] [Accepted: 05/02/2023] [Indexed: 05/31/2023] Open
Abstract
Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is a contagious respiratory virus that is the cause of the coronavirus disease 2019 (COVID-19) pandemic which has posed a serious threat to public health. COVID-19 is characterized by a wide spectrum of clinical manifestations, ranging from asymptomatic infection to mild cold-like symptoms, severe pneumonia or even death. Inflammasomes are supramolecular signaling platforms that assemble in response to danger or microbial signals. Upon activation, inflammasomes mediate innate immune defense by favoring the release of proinflammatory cytokines and triggering pyroptotic cell death. Nevertheless, abnormalities in inflammasome functioning can result in a variety of human diseases such as autoimmune disorders and cancer. A growing body of evidence has showed that SARS-CoV-2 infection can induce inflammasome assembly. Dysregulated inflammasome activation and consequent cytokine burst have been associated with COVID-19 severity, alluding to the implication of inflammasomes in COVID-19 pathophysiology. Accordingly, an improved understanding of inflammasome-mediated inflammatory cascades in COVID-19 is essential to uncover the immunological mechanisms of COVID-19 pathology and identify effective therapeutic approaches for this devastating disease. In this review, we summarize the most recent findings on the interplay between SARS-CoV-2 and inflammasomes and the contribution of activated inflammasomes to COVID-19 progression. We dissect the mechanisms involving the inflammasome machinery in COVID-19 immunopathogenesis. In addition, we provide an overview of inflammasome-targeted therapies or antagonists that have potential clinical utility in COVID-19 treatment.
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Affiliation(s)
- Man Wang
- *Correspondence: Man Wang, ; Peifeng Li,
| | | | | | | | | | - Peifeng Li
- *Correspondence: Man Wang, ; Peifeng Li,
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73
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Bharadwaj R, Lusi CF, Mashayekh S, Nagar A, Subbarao M, Kane GI, Wodzanowski KA, Brown AR, Okuda K, Monahan A, Paik D, Nandy A, Anonick MV, Goldman WE, Kanneganti TD, Orzalli MH, Grimes CL, Atukorale PU, Silverman N. Methotrexate suppresses psoriatic skin inflammation by inhibiting muropeptide transporter SLC46A2 activity. Immunity 2023; 56:998-1012.e8. [PMID: 37116499 PMCID: PMC10195032 DOI: 10.1016/j.immuni.2023.04.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2022] [Revised: 01/04/2023] [Accepted: 04/03/2023] [Indexed: 04/30/2023]
Abstract
Cytosolic innate immune sensing is critical for protecting barrier tissues. NOD1 and NOD2 are cytosolic sensors of small peptidoglycan fragments (muropeptides) derived from the bacterial cell wall. These muropeptides enter cells, especially epithelial cells, through unclear mechanisms. We previously implicated SLC46 transporters in muropeptide transport in Drosophila immunity. Here, we focused on Slc46a2, which was highly expressed in mammalian epidermal keratinocytes, and showed that it was critical for the delivery of diaminopimelic acid (DAP)-muropeptides and activation of NOD1 in keratinocytes, whereas the related transporter Slc46a3 was critical for delivering the NOD2 ligand MDP to keratinocytes. In a mouse model, Slc46a2 and Nod1 deficiency strongly suppressed psoriatic inflammation, whereas methotrexate, a commonly used psoriasis therapeutic, inhibited Slc46a2-dependent transport of DAP-muropeptides. Collectively, these studies define SLC46A2 as a transporter of NOD1-activating muropeptides, with critical roles in the skin barrier, and identify this transporter as an important target for anti-inflammatory intervention.
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Affiliation(s)
- Ravi Bharadwaj
- Program in Innate Immunity and Division of Infectious Diseases and Immunology, Department of Medicine, University of Massachusetts Chan Medical School, Worcester, MA 01605, USA
| | - Christina F Lusi
- Department of Biomedical Engineering, University of Massachusetts Amherst, Amherst, MA 01003, USA
| | | | - Abhinit Nagar
- Program in Innate Immunity and Division of Infectious Diseases and Immunology, Department of Medicine, University of Massachusetts Chan Medical School, Worcester, MA 01605, USA
| | - Malireddi Subbarao
- Department of Immunology, St Jude Children's Research Hospital, Memphis, TN 38105, USA
| | - Griffin I Kane
- Department of Biomedical Engineering, University of Massachusetts Amherst, Amherst, MA 01003, USA
| | | | - Ashley R Brown
- Chemistry and Biochemistry, University of Delaware, Newark, DE, USA
| | - Kendi Okuda
- Program in Innate Immunity and Division of Infectious Diseases and Immunology, Department of Medicine, University of Massachusetts Chan Medical School, Worcester, MA 01605, USA
| | - Amanda Monahan
- Program in Innate Immunity and Division of Infectious Diseases and Immunology, Department of Medicine, University of Massachusetts Chan Medical School, Worcester, MA 01605, USA
| | - Donggi Paik
- Program in Innate Immunity and Division of Infectious Diseases and Immunology, Department of Medicine, University of Massachusetts Chan Medical School, Worcester, MA 01605, USA
| | - Anubhab Nandy
- Program in Innate Immunity and Division of Infectious Diseases and Immunology, Department of Medicine, University of Massachusetts Chan Medical School, Worcester, MA 01605, USA
| | | | - William E Goldman
- Department of Microbiology, University of North Carolina School of Medicine, Chapel Hill, NC 27599, USA
| | | | - Megan H Orzalli
- Program in Innate Immunity and Division of Infectious Diseases and Immunology, Department of Medicine, University of Massachusetts Chan Medical School, Worcester, MA 01605, USA
| | | | - Prabhani U Atukorale
- Department of Biomedical Engineering, University of Massachusetts Amherst, Amherst, MA 01003, USA
| | - Neal Silverman
- Program in Innate Immunity and Division of Infectious Diseases and Immunology, Department of Medicine, University of Massachusetts Chan Medical School, Worcester, MA 01605, USA.
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74
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Kroken AR, Klein KA, Mitchell PS, Nieto V, Jedel EJ, Evans DJ, Fleiszig SMJ. Intracellular replication of Pseudomonas aeruginosa in epithelial cells requires suppression of the caspase-4 inflammasome. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.02.13.528260. [PMID: 36824932 PMCID: PMC9948977 DOI: 10.1101/2023.02.13.528260] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/15/2023]
Abstract
Pathogenesis of Pseudomonas aeruginosa infections can include bacterial survival inside epithelial cells. Previously, we showed this involves multiple roles played by the type three-secretion system (T3SS), and specifically the effector ExoS. This includes ExoS-dependent inhibition of a lytic host cell response that subsequently enables intracellular replication. Here, we studied the underlying cell death response to intracellular P. aeruginosa, comparing wild-type to T3SS mutants varying in capacity to induce cell death and that localize to different intracellular compartments. Results showed that corneal epithelial cell death induced by intracellular P. aeruginosa lacking the T3SS, which remains in vacuoles, correlated with activation of NF-κB as measured by p65 relocalization and TNFα transcription and secretion. Deletion of caspase-4 through CRISPR-Cas9 mutagenesis delayed cell death caused by these intracellular T3SS mutants. Caspase-4 deletion also countered more rapid cell death caused by T3SS effector-null mutants still expressing the TSSS apparatus that traffic to the host cell cytoplasm, and in doing so rescued intracellular replication normally dependent on ExoS. While HeLa cells lacked a lytic death response to T3SS mutants, it was found to be enabled by interferon gamma treatment. Together, these results show that epithelial cells can activate the noncanonical inflammasome pathway to limit proliferation of intracellular P. aeruginosa, not fully dependent on bacterially-driven vacuole escape. Since ExoS inhibits the lytic response, the data implicate targeting of caspase-4, an intracellular pattern recognition receptor, as another contributor to the role of ExoS in the intracellular lifestyle of P. aeruginosa.
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Affiliation(s)
- Abby R Kroken
- Department of Microbiology and Immunology, Loyola University Chicago, Maywood, IL USA
- Herbert Wertheim School of Optometry & Vision Science, University of California, Berkeley, CA USA
| | - Keith A Klein
- Department of Microbiology and Immunology, Loyola University Chicago, Maywood, IL USA
| | | | - Vincent Nieto
- Herbert Wertheim School of Optometry & Vision Science, University of California, Berkeley, CA USA
| | - Eric J Jedel
- Herbert Wertheim School of Optometry & Vision Science, University of California, Berkeley, CA USA
| | - David J Evans
- Herbert Wertheim School of Optometry & Vision Science, University of California, Berkeley, CA USA
- College of Pharmacy, Touro University California, Vallejo, CA USA
| | - Suzanne M J Fleiszig
- Herbert Wertheim School of Optometry & Vision Science, University of California, Berkeley, CA USA
- Graduate Groups in Vision Sciences, Microbiology, and Infectious Diseases & Immunity, University of California, Berkeley, CA USA
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75
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Łasut-Szyszka B, Rusin M. The Wheel of p53 Helps to Drive the Immune System. Int J Mol Sci 2023; 24:ijms24087645. [PMID: 37108808 PMCID: PMC10143509 DOI: 10.3390/ijms24087645] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2023] [Revised: 04/18/2023] [Accepted: 04/18/2023] [Indexed: 04/29/2023] Open
Abstract
The p53 tumor suppressor protein is best known as an inhibitor of the cell cycle and an inducer of apoptosis. Unexpectedly, these functions of p53 are not required for its tumor suppressive activity in animal models. High-throughput transcriptomic investigations as well as individual studies have demonstrated that p53 stimulates expression of many genes involved in immunity. Probably to interfere with its immunostimulatory role, many viruses code for proteins that inactivate p53. Judging by the activities of immunity-related p53-regulated genes it can be concluded that p53 is involved in detection of danger signals, inflammasome formation and activation, antigen presentation, activation of natural killer cells and other effectors of immunity, stimulation of interferon production, direct inhibition of virus replication, secretion of extracellular signaling molecules, production of antibacterial proteins, negative feedback loops in immunity-related signaling pathways, and immunologic tolerance. Many of these p53 functions have barely been studied and require further, more detailed investigations. Some of them appear to be cell-type specific. The results of transcriptomic studies have generated many new hypotheses on the mechanisms utilized by p53 to impact on the immune system. In the future, these mechanisms may be harnessed to fight cancer and infectious diseases.
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Affiliation(s)
- Barbara Łasut-Szyszka
- Center for Translational Research and Molecular Biology of Cancer, Maria Skłodowska-Curie National Research Institute of Oncology, Gliwice Branch, 44-101 Gliwice, Poland
| | - Marek Rusin
- Center for Translational Research and Molecular Biology of Cancer, Maria Skłodowska-Curie National Research Institute of Oncology, Gliwice Branch, 44-101 Gliwice, Poland
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76
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Alijagic A, Hedbrant A, Persson A, Larsson M, Engwall M, Särndahl E. NLRP3 inflammasome as a sensor of micro- and nanoplastics immunotoxicity. Front Immunol 2023; 14:1178434. [PMID: 37143682 PMCID: PMC10151538 DOI: 10.3389/fimmu.2023.1178434] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2023] [Accepted: 03/31/2023] [Indexed: 05/06/2023] Open
Abstract
Micro- and nanoplastics (MNPs) are emerging pollutants with scarcely investigated effects on human innate immunity. If they follow a similar course of action as other, more thoroughly investigated particulates, MNPs may penetrate epithelial barriers, potentially triggering a cascade of signaling events leading to cell damage and inflammation. Inflammasomes are intracellular multiprotein complexes and stimulus-induced sensors critical for mounting inflammatory responses upon recognition of pathogen- or damage-associated molecular patterns. Among these, the NLRP3 inflammasome is the most studied in terms of activation via particulates. However, studies delineating the ability of MNPs to affect NLRP3 inflammasome activation are still rare. In this review, we address the issue of MNPs source and fate, highlight the main concepts of inflammasome activation via particulates, and explore recent advances in using inflammasome activation for assessment of MNP immunotoxicity. We also discuss the impact of co-exposure and MNP complex chemistry in potential inflammasome activation. Development of robust biological sensors is crucial in order to maximize global efforts to effectively address and mitigate risks that MNPs pose for human health.
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Affiliation(s)
- Andi Alijagic
- Inflammatory Response and Infection Susceptibility Centre (iRiSC), Faculty of Medicine and Health, Örebro University, Örebro, Sweden
- School of Medical Sciences, Faculty of Medicine and Health, Örebro University, Örebro, Sweden
- Man-Technology-Environment Research Center (MTM), Örebro University, Örebro, Sweden
| | - Alexander Hedbrant
- Inflammatory Response and Infection Susceptibility Centre (iRiSC), Faculty of Medicine and Health, Örebro University, Örebro, Sweden
- School of Medical Sciences, Faculty of Medicine and Health, Örebro University, Örebro, Sweden
| | - Alexander Persson
- Inflammatory Response and Infection Susceptibility Centre (iRiSC), Faculty of Medicine and Health, Örebro University, Örebro, Sweden
- School of Medical Sciences, Faculty of Medicine and Health, Örebro University, Örebro, Sweden
| | - Maria Larsson
- Man-Technology-Environment Research Center (MTM), Örebro University, Örebro, Sweden
| | - Magnus Engwall
- Man-Technology-Environment Research Center (MTM), Örebro University, Örebro, Sweden
| | - Eva Särndahl
- Inflammatory Response and Infection Susceptibility Centre (iRiSC), Faculty of Medicine and Health, Örebro University, Örebro, Sweden
- School of Medical Sciences, Faculty of Medicine and Health, Örebro University, Örebro, Sweden
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77
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Ke Q, Greenawalt AN, Manukonda V, Ji X, Tisch RM. The regulation of self-tolerance and the role of inflammasome molecules. Front Immunol 2023; 14:1154552. [PMID: 37081890 PMCID: PMC10110889 DOI: 10.3389/fimmu.2023.1154552] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Accepted: 03/17/2023] [Indexed: 04/07/2023] Open
Abstract
Inflammasome molecules make up a family of receptors that typically function to initiate a proinflammatory response upon infection by microbial pathogens. Dysregulation of inflammasome activity has been linked to unwanted chronic inflammation, which has also been implicated in certain autoimmune diseases such as multiple sclerosis, rheumatoid arthritis, type 1 diabetes, systemic lupus erythematosus, and related animal models. Classical inflammasome activation-dependent events have intrinsic and extrinsic effects on both innate and adaptive immune effectors, as well as resident cells in the target tissue, which all can contribute to an autoimmune response. Recently, inflammasome molecules have also been found to regulate the differentiation and function of immune effector cells independent of classical inflammasome-activated inflammation. These alternative functions for inflammasome molecules shape the nature of the adaptive immune response, that in turn can either promote or suppress the progression of autoimmunity. In this review we will summarize the roles of inflammasome molecules in regulating self-tolerance and the development of autoimmunity.
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Affiliation(s)
- Qi Ke
- Department of Microbiology and Immunology, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States
| | - Ashley Nicole Greenawalt
- Department of Microbiology and Immunology, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States
| | - Veera Manukonda
- Department of Microbiology and Immunology, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States
| | - Xingqi Ji
- Department of Microbiology and Immunology, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States
| | - Roland Michael Tisch
- Department of Microbiology and Immunology, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States
- Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States
- *Correspondence: Roland Michael Tisch,
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78
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Muela-Zarzuela I, Suarez-Rivero JM, Gallardo-Orihuela A, Wang C, Izawa K, de Gregorio-Procopio M, Couillin I, Ryffel B, Kitaura J, Sanz A, von Zglinicki T, Mbalaviele G, Cordero MD. NLRP1 inflammasome modulates senescence and senescence-associated secretory phenotype. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.02.06.527254. [PMID: 36798300 PMCID: PMC9934543 DOI: 10.1101/2023.02.06.527254] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Senescence is a cellular aging-related process triggered by different stresses and characterized by the secretion of various inflammatory factors referred to as the senescence-associated secretory phenotype (SASP). Here, we present evidence that the inflammasome sensor, NLRP1, is a key mediator of senescence induced by irradiation both in vitro and in vivo. The NLRP1 inflammasome promotes senescence by regulating the expression of p16, p21, p53, and SASP in Gasdermin D (GSDMD)-dependent manner as these responses are reduced in conditions of NLRP1 insufficiency or GSDMD inhibition. Mechanistically, the NLRP1 inflammasome is activated downstream of the cytosolic DNA sensor cGMP-AMP (cGAMP) synthase (cGAS) in response to genomic damage. These findings provide a rationale for inhibiting the NLRP1 inflammasome-GSDMD axis to treat senescence-driven disorders.
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79
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Zhang Z, Li X, Wang Y, Wei Y, Wei X. Involvement of inflammasomes in tumor microenvironment and tumor therapies. J Hematol Oncol 2023; 16:24. [PMID: 36932407 PMCID: PMC10022228 DOI: 10.1186/s13045-023-01407-7] [Citation(s) in RCA: 23] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Accepted: 02/08/2023] [Indexed: 03/19/2023] Open
Abstract
Inflammasomes are macromolecular platforms formed in response to damage-associated molecular patterns (DAMPs) and pathogen-associated molecular patterns, whose formation would cause maturation of interleukin-1 (IL-1) family members and gasdermin D (GSDMD), leading to IL-1 secretion and pyroptosis respectively. Several kinds of inflammasomes detecting different types of dangers have been found. The activation of inflammasomes is regulated at both transcription and posttranscription levels, which is crucial in protecting the host from infections and sterile insults. Present findings have illustrated that inflammasomes are involved in not only infection but also the pathology of tumors implying an important link between inflammation and tumor development. Generally, inflammasomes participate in tumorigenesis, cell death, metastasis, immune evasion, chemotherapy, target therapy, and radiotherapy. Inflammasome components are upregulated in some tumors, and inflammasomes can be activated in cancer cells and other stromal cells by DAMPs, chemotherapy agents, and radiation. In some cases, inflammasomes inhibit tumor progression by initiating GSDMD-mediated pyroptosis in cancer cells and stimulating IL-1 signal-mediated anti-tumor immunity. However, IL-1 signal recruits immunosuppressive cell subsets in other cases. We discuss the conflicting results and propose some possible explanations. Additionally, we also summarize interventions targeting inflammasome pathways in both preclinical and clinical stages. Interventions targeting inflammasomes are promising for immunotherapy and combination therapy.
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Affiliation(s)
- Ziqi Zhang
- grid.13291.380000 0001 0807 1581Laboratory of Aging Research and Cancer Drug Target, State Key Laboratory of Biotherapy, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, No. 17, Block 3, Southern Renmin Road, Chengdu, 610041 Sichuan People’s Republic of China
| | - Xue Li
- grid.13291.380000 0001 0807 1581Laboratory of Aging Research and Cancer Drug Target, State Key Laboratory of Biotherapy, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, No. 17, Block 3, Southern Renmin Road, Chengdu, 610041 Sichuan People’s Republic of China
| | - Yang Wang
- grid.13291.380000 0001 0807 1581Laboratory of Aging Research and Cancer Drug Target, State Key Laboratory of Biotherapy, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, No. 17, Block 3, Southern Renmin Road, Chengdu, 610041 Sichuan People’s Republic of China
| | - Yuquan Wei
- grid.13291.380000 0001 0807 1581Laboratory of Aging Research and Cancer Drug Target, State Key Laboratory of Biotherapy, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, No. 17, Block 3, Southern Renmin Road, Chengdu, 610041 Sichuan People’s Republic of China
| | - Xiawei Wei
- grid.13291.380000 0001 0807 1581Laboratory of Aging Research and Cancer Drug Target, State Key Laboratory of Biotherapy, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, No. 17, Block 3, Southern Renmin Road, Chengdu, 610041 Sichuan People’s Republic of China
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80
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Almeida-da-Silva CLC, Savio LEB, Coutinho-Silva R, Ojcius DM. The role of NOD-like receptors in innate immunity. Front Immunol 2023; 14:1122586. [PMID: 37006312 PMCID: PMC10050748 DOI: 10.3389/fimmu.2023.1122586] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2022] [Accepted: 02/02/2023] [Indexed: 03/17/2023] Open
Abstract
The innate immune system in vertebrates and invertebrates relies on conserved receptors and ligands, and pathways that can rapidly initiate the host response against microbial infection and other sources of stress and danger. Research into the family of NOD-like receptors (NLRs) has blossomed over the past two decades, with much being learned about the ligands and conditions that stimulate the NLRs and the outcomes of NLR activation in cells and animals. The NLRs play key roles in diverse functions, ranging from transcription of MHC molecules to initiation of inflammation. Some NLRs are activated directly by their ligands, while other ligands may have indirect effects on the NLRs. New findings in coming years will undoubtedly shed more light on molecular details involved in NLR activation, as well as the physiological and immunological outcomes of NLR ligation.
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Affiliation(s)
- Cássio Luiz Coutinho Almeida-da-Silva
- Department of Biomedical Sciences, Arthur A. Dugoni School of Dentistry, University of the Pacific, San Francisco, CA, United States
- *Correspondence: Cássio Luiz Coutinho Almeida-da-Silva, ; David M. Ojcius,
| | - Luiz Eduardo Baggio Savio
- Laboratory of Immunophysiology, Biophysics Institute Carlos Chagas Filho, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Robson Coutinho-Silva
- Laboratory of Immunophysiology, Biophysics Institute Carlos Chagas Filho, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - David M. Ojcius
- Department of Biomedical Sciences, Arthur A. Dugoni School of Dentistry, University of the Pacific, San Francisco, CA, United States
- *Correspondence: Cássio Luiz Coutinho Almeida-da-Silva, ; David M. Ojcius,
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81
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Wu X, Yang ZH, Wu J, Han J. Ribosome-rescuer PELO catalyzes the oligomeric assembly of NOD-like receptor family proteins via activating their ATPase enzymatic activity. Immunity 2023; 56:926-943.e7. [PMID: 36948192 DOI: 10.1016/j.immuni.2023.02.014] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Revised: 12/17/2022] [Accepted: 02/22/2023] [Indexed: 03/24/2023]
Abstract
NOD-like receptors (NLRs) are pattern recognition receptors for diverse innate immune responses. Self-oligomerization after engagement with a ligand is a generally accepted model for the activation of each NLR. We report here that a catalyzer was required for NLR self-oligomerization. PELO, a well-known surveillance factor in translational quality control and/or ribosome rescue, interacted with all cytosolic NLRs and activated their ATPase activity. In the case of flagellin-initiated NLRC4 inflammasome activation, flagellin-bound NAIP5 recruited the first NLRC4 and then PELO was required for correctly assembling the rest of NLRC4s into the NLRC4 complex, one by one, by activating the NLRC4 ATPase activity. Stoichiometric and functional data revealed that PELO was not a structural constituent of the NLRC4 inflammasome but a powerful catalyzer for its assembly. The catalytic role of PELO in the activation of cytosolic NLRs provides insight into NLR activation and provides a direction for future studies of NLR family members.
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Affiliation(s)
- Xiurong Wu
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Faculty of Medicine and Life Sciences, Xiamen University, Xiamen, Fujian 361102, China.
| | - Zhang-Hua Yang
- Research Unit of Cellular Stress of CAMS, Xiang'an Hospital of Xiamen University, Cancer Research Center of Xiamen University, School of Medicine, Faculty of Medicine and Life Sciences, Xiamen University, Xiamen, Fujian 361102, China
| | - Jianfeng Wu
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Faculty of Medicine and Life Sciences, Xiamen University, Xiamen, Fujian 361102, China; Laboratory Animal Center, Xiamen University, Xiamen, Fujian 361102, China
| | - Jiahuai Han
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Faculty of Medicine and Life Sciences, Xiamen University, Xiamen, Fujian 361102, China; Research Unit of Cellular Stress of CAMS, Xiang'an Hospital of Xiamen University, Cancer Research Center of Xiamen University, School of Medicine, Faculty of Medicine and Life Sciences, Xiamen University, Xiamen, Fujian 361102, China; Laboratory Animal Center, Xiamen University, Xiamen, Fujian 361102, China.
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82
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Lu S, Li Y, Qian Z, Zhao T, Feng Z, Weng X, Yu L. Role of the inflammasome in insulin resistance and type 2 diabetes mellitus. Front Immunol 2023; 14:1052756. [PMID: 36993972 PMCID: PMC10040598 DOI: 10.3389/fimmu.2023.1052756] [Citation(s) in RCA: 14] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2022] [Accepted: 02/27/2023] [Indexed: 03/18/2023] Open
Abstract
The inflammasome is a protein complex composed of a variety of proteins in cells and which participates in the innate immune response of the body. It can be activated by upstream signal regulation and plays an important role in pyroptosis, apoptosis, inflammation, tumor regulation, etc. In recent years, the number of metabolic syndrome patients with insulin resistance (IR) has increased year by year, and the inflammasome is closely related to the occurrence and development of metabolic diseases. The inflammasome can directly or indirectly affect conduction of the insulin signaling pathway, involvement the occurrence of IR and type 2 diabetes mellitus (T2DM). Moreover, various therapeutic agents also work through the inflammasome to treat with diabetes. This review focuses on the role of inflammasome on IR and T2DM, pointing out the association and utility value. Briefly, we have discussed the main inflammasomes, including NLRP1, NLRP3, NLRC4, NLRP6 and AIM2, as well as their structure, activation and regulation in IR were described in detail. Finally, we discussed the current therapeutic options-associated with inflammasome for the treatment of T2DM. Specially, the NLRP3-related therapeutic agents and options are widely developed. In summary, this article reviews the role of and research progress on the inflammasome in IR and T2DM.
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Affiliation(s)
- Shen Lu
- The Third Affiliated Hospital of Xinxiang Medical University, Xinxiang, Henan, China
| | - Yanrong Li
- School of Basic Medical Sciences, Xinxiang Medical University, Xinxiang, Henan, China
- Institute of Precision Medicine, Xinxiang Medical University, Xinxiang, Henan, China
| | - Zhaojun Qian
- The Third Affiliated Hospital of Xinxiang Medical University, Xinxiang, Henan, China
| | - Tiesuo Zhao
- School of Basic Medical Sciences, Xinxiang Medical University, Xinxiang, Henan, China
- Institute of Precision Medicine, Xinxiang Medical University, Xinxiang, Henan, China
- Xinxiang Key Laboratory of Tumor Vaccine and Immunotherapy, Xinxiang Medical University, Xinxiang, Henan, China
| | - Zhiwei Feng
- School of Basic Medical Sciences, Xinxiang Medical University, Xinxiang, Henan, China
- Institute of Precision Medicine, Xinxiang Medical University, Xinxiang, Henan, China
- Xinxiang Key Laboratory of Tumor Vaccine and Immunotherapy, Xinxiang Medical University, Xinxiang, Henan, China
| | - Xiaogang Weng
- The Third Affiliated Hospital of Xinxiang Medical University, Xinxiang, Henan, China
- *Correspondence: Lili Yu, ; Xiaogang Weng,
| | - Lili Yu
- The Third Affiliated Hospital of Xinxiang Medical University, Xinxiang, Henan, China
- School of Basic Medical Sciences, Xinxiang Medical University, Xinxiang, Henan, China
- Institute of Precision Medicine, Xinxiang Medical University, Xinxiang, Henan, China
- Xinxiang Key Laboratory of Tumor Vaccine and Immunotherapy, Xinxiang Medical University, Xinxiang, Henan, China
- *Correspondence: Lili Yu, ; Xiaogang Weng,
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83
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Cassiano LMG, Cavalcante-Silva V, Oliveira MS, Prado BVO, Cardoso CG, Salim ACM, Franco GR, D’Almeida V, Francisco SC, Coimbra RS. Vitamin B12 attenuates leukocyte inflammatory signature in COVID-19 via methyl-dependent changes in epigenetic markings. Front Immunol 2023; 14:1048790. [PMID: 36993968 PMCID: PMC10040807 DOI: 10.3389/fimmu.2023.1048790] [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: 09/21/2022] [Accepted: 02/27/2023] [Indexed: 03/16/2023] Open
Abstract
COVID-19 induces chromatin remodeling in host immune cells, and it had previously been shown that vitamin B12 downregulates some inflammatory genes via methyl-dependent epigenetic mechanisms. In this work, whole blood cultures from moderate or severe COVID-19 patients were used to assess the potential of B12 as adjuvant drug. The vitamin normalized the expression of a panel of inflammatory genes still dysregulated in the leukocytes despite glucocorticoid therapy during hospitalization. B12 also increased the flux of the sulfur amino acid pathway, that regulates the bioavailability of methyl. Accordingly, B12-induced downregulation of CCL3 strongly and negatively correlated with the hypermethylation of CpGs in its regulatory regions. Transcriptome analysis revealed that B12 attenuates the effects of COVID-19 on most inflammation-related pathways affected by the disease. As far as we are aware, this is the first study to demonstrate that pharmacological modulation of epigenetic markings in leukocytes favorably regulates central components of COVID-19 physiopathology.
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Affiliation(s)
- Larissa M. G. Cassiano
- Neurogenômica, Imunopatologia, Instituto René Rachou, Fiocruz, Belo Horizonte, Brazil
- Departamento de Bioquímica e Imunologia, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Vanessa Cavalcante-Silva
- Departamento de Psicobiologia, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, Brazil
| | - Marina S. Oliveira
- Neurogenômica, Imunopatologia, Instituto René Rachou, Fiocruz, Belo Horizonte, Brazil
| | | | | | - Anna C. M. Salim
- Plataforma de Sequenciamento NGS (Next Generation Sequencing), Instituto René Rachou, Fiocruz, Belo Horizonte, Brazil
| | - Gloria R. Franco
- Departamento de Bioquímica e Imunologia, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Vânia D’Almeida
- Departamento de Psicobiologia, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, Brazil
| | | | - Roney S. Coimbra
- Neurogenômica, Imunopatologia, Instituto René Rachou, Fiocruz, Belo Horizonte, Brazil
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84
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Jin X, Zhao X. A new immune checkpoint-associated nine-gene signature for prognostic prediction of glioblastoma. Medicine (Baltimore) 2023; 102:e33150. [PMID: 36862886 PMCID: PMC9981394 DOI: 10.1097/md.0000000000033150] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/12/2022] [Accepted: 02/10/2023] [Indexed: 03/04/2023] Open
Abstract
Glioblastoma (GBM) is a highly malignant neurological tumor that has a poor prognosis. While pyroptosis affects cancer cell proliferation, invasion and migration, function of pyroptosis-related genes (PRGs) in GBM as well as the prognostic significance of PRGs remain obscure. By analyzing the mechanisms involved in the association between pyroptosis and GBM, our study hopes to provide new insights into the treatment of GBM. Here, 32 out of 52 PRGs were identified as the differentially expressed genes between GBM tumor versus normal tissues. And all GBM cases were assigned to 2 groups according to the expression of the differentially expressed genes using comprehensive bioinformatics analysis. The least absolute shrinkage and selection operator analysis led to the construction of a 9-gene signature, and the cancer genome atlas cohort of GBM patients were categorized into high risk and low risk subgroups. A significant increase in the survival possibility was found in low risk patients in comparison with the high risk ones. Consistently, low risk patients of a gene expression omnibus cohort displayed a markedly longer overall survival than the high risk counterparts. The risk score calculated using the gene signature was found to be an independent predictor of survival of GBM cases. Besides, we observed significant differences in the expression levels of immune checkpoints between the high risk versus low risk GBM cases, providing instructive suggestions for immunotherapy of GBM. Overall, the present study developed a new multigene signature for prognostic prediction of GBM.
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Affiliation(s)
- Xiao Jin
- The Personnel Department, Dongfang Hospital Affiliated to Beijing University of Chinese Medicine, Fengtai District, Beijing, China
| | - Xiang Zhao
- Department of Neurosurgery, The First Hospital of China Medical University, Shenyang, Liaoning, China
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85
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Zou Z, Zhao M, Yang Y, Xie Y, Li Z, Zhou L, Shang R, Zhou P. The role of pyroptosis in hepatocellular carcinoma. Cell Oncol (Dordr) 2023. [PMID: 36864264 DOI: 10.1007/s13402-023-00787-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/04/2023] Open
Abstract
Hepatocellular carcinoma (HCC) is the main histologic type of liver cancer. It accounts for the majority of all diagnoses and deaths due to liver cancer. The induction of tumor cell death is an effective strategy to control tumor development. Pyroptosis is an inflammatory programmed cell death caused by microbial infection, accompanied by activation of inflammasomes and release of pro-inflammatory cytokines, interleukin-1β (IL-1β), and interleukin-18 (IL-18). The cleavage of gasdermins (GSDMs) promotes the occurrence of pyroptosis leading to cell swelling, lysis, and death. Accumulating evidence has indicated that pyroptosis influences the progression of HCC by regulating immune-mediated tumor cell death. Currently, some researchers hold the view that inhibition of pyroptosis-related components may prevent the incidence of HCC, but more researchers have the view that activation of pyroptosis exerts a tumor-inhibitory effect. Growing evidence indicates that pyroptosis can prevent or promote tumor development depending on the type of tumor. In this review, pyroptosis pathways and pyroptosis-related components were discussed. Next, the role of pyroptosis and its components in HCC was described. Finally, the therapeutic significance of pyroptosis in HCC was discussed.
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Affiliation(s)
- Zhimiao Zou
- Institute of Organ Transplantation, Tongji Hospital, Tongji Medical College, Key Laboratory of Organ Transplantation, NHC Key Laboratory of Organ Transplantation, Key Laboratory of Organ Transplantation, Huazhong University of Science and Technology, Ministry of Education, Chinese Academy of Medical Sciences, 1095 Jiefang Road, Wuhan, Hubei, 430030, China
| | - Minghui Zhao
- Institute of Organ Transplantation, Tongji Hospital, Tongji Medical College, Key Laboratory of Organ Transplantation, NHC Key Laboratory of Organ Transplantation, Key Laboratory of Organ Transplantation, Huazhong University of Science and Technology, Ministry of Education, Chinese Academy of Medical Sciences, 1095 Jiefang Road, Wuhan, Hubei, 430030, China
| | - Yang Yang
- Institute of Organ Transplantation, Tongji Hospital, Tongji Medical College, Key Laboratory of Organ Transplantation, NHC Key Laboratory of Organ Transplantation, Key Laboratory of Organ Transplantation, Huazhong University of Science and Technology, Ministry of Education, Chinese Academy of Medical Sciences, 1095 Jiefang Road, Wuhan, Hubei, 430030, China
| | - Yalong Xie
- Institute of Organ Transplantation, Tongji Hospital, Tongji Medical College, Key Laboratory of Organ Transplantation, NHC Key Laboratory of Organ Transplantation, Key Laboratory of Organ Transplantation, Huazhong University of Science and Technology, Ministry of Education, Chinese Academy of Medical Sciences, 1095 Jiefang Road, Wuhan, Hubei, 430030, China
| | - Zeyang Li
- Institute of Organ Transplantation, Tongji Hospital, Tongji Medical College, Key Laboratory of Organ Transplantation, NHC Key Laboratory of Organ Transplantation, Key Laboratory of Organ Transplantation, Huazhong University of Science and Technology, Ministry of Education, Chinese Academy of Medical Sciences, 1095 Jiefang Road, Wuhan, Hubei, 430030, China
| | - Liang Zhou
- Institute of Organ Transplantation, Tongji Hospital, Tongji Medical College, Key Laboratory of Organ Transplantation, NHC Key Laboratory of Organ Transplantation, Key Laboratory of Organ Transplantation, Huazhong University of Science and Technology, Ministry of Education, Chinese Academy of Medical Sciences, 1095 Jiefang Road, Wuhan, Hubei, 430030, China
| | - Runshi Shang
- Institute of Organ Transplantation, Tongji Hospital, Tongji Medical College, Key Laboratory of Organ Transplantation, NHC Key Laboratory of Organ Transplantation, Key Laboratory of Organ Transplantation, Huazhong University of Science and Technology, Ministry of Education, Chinese Academy of Medical Sciences, 1095 Jiefang Road, Wuhan, Hubei, 430030, China
| | - Ping Zhou
- Institute of Organ Transplantation, Tongji Hospital, Tongji Medical College, Key Laboratory of Organ Transplantation, NHC Key Laboratory of Organ Transplantation, Key Laboratory of Organ Transplantation, Huazhong University of Science and Technology, Ministry of Education, Chinese Academy of Medical Sciences, 1095 Jiefang Road, Wuhan, Hubei, 430030, China.
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86
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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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87
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Zhu P, Ke ZR, Chen JX, Li SJ, Ma TL, Fan XL. Advances in mechanism and regulation of PANoptosis: Prospects in disease treatment. Front Immunol 2023; 14:1120034. [PMID: 36845112 PMCID: PMC9948402 DOI: 10.3389/fimmu.2023.1120034] [Citation(s) in RCA: 32] [Impact Index Per Article: 32.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Accepted: 01/31/2023] [Indexed: 02/11/2023] Open
Abstract
PANoptosis, a new research hotspot at the moment, is a cell death pattern in which pyroptosis, apoptosis, and necroptosis all occur in the same cell population. In essence, PANoptosis is a highly coordinated and dynamically balanced programmed inflammatory cell death pathway that combines the main features of pyroptosis, apoptosis, and necroptosis. Many variables, such as infection, injury, or self-defect, may be involved in the occurrence of PANoptosis, with the assembly and activation of the PANoptosome being the most critical. PANoptosis has been linked to the development of multiple systemic diseases in the human body, including infectious diseases, cancer, neurodegenerative diseases, and inflammatory diseases. Therefore, it is necessary to clarify the process of occurrence, the regulatory mechanism of PANoptosis, and its relation to diseases. In this paper, we summarized the differences and relations between PANoptosis and the three types of programmed cell death, and emphatically expounded molecular mechanism and regulatory patterns of PANoptosis, with the expectation of facilitating the application of PANoptosis regulation in disease treatment.
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Affiliation(s)
- Peng Zhu
- XiangYa School of Medicine, Central South University, Changsha, Hunan, China
| | - Zhuo-Ran Ke
- XiangYa School of Medicine, Central South University, Changsha, Hunan, China
| | - Jing-Xian Chen
- XiangYa School of Medicine, Central South University, Changsha, Hunan, China
| | - Shi-Jin Li
- School of Anesthesiology, Guizhou Medical University, Guiyang, Guizhou, China
| | - Tian-Liang Ma
- Department of Orthopedics, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Xiao-Lei Fan
- Department of Orthopedics, Honghui Hospital, Xi’an Jiaotong University, Xi’an, China
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88
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Min AK, Fortune T, Rodriguez N, Hedge E, Swartz TH. Inflammasomes as mediators of inflammation in HIV-1 infection. Transl Res 2023; 252:1-8. [PMID: 35917903 PMCID: PMC10160852 DOI: 10.1016/j.trsl.2022.07.008] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/02/2022] [Revised: 07/23/2022] [Accepted: 07/27/2022] [Indexed: 01/14/2023]
Abstract
Human immunodeficiency virus type 1 (HIV-1) infection is a chronic disease without a known cure. The advent of effective antiretroviral therapy (ART) has enabled people with HIV (PWH) to have significantly prolonged life expectancies. As a result, morbidity and mortality associated with HIV-1 infection have declined considerably. However, these individuals experience chronic systemic inflammation whose multifaceted etiology is associated with other numerous comorbidities. Inflammasomes are vital mediators that contribute to inflammatory signaling in HIV-1 infection. Here, we provide an overview of the inflammatory pathway that underlies HIV-1 infection, explicitly highlighting the role of the NLRP3 inflammasome. We also delineate the current literature on inflammasomes and the therapeutic targeting strategies aimed at the NLRP3 inflammasome to moderate HIV-1 infection-associated inflammation. Here we describe the NLRP3 inflammasome as a key pathway in developing novel therapeutic targets to block HIV-1 replication and HIV-1-associated inflammatory signaling. Controlling the inflammatory pathways is critical in alleviating the morbidities and mortality associated with chronic HIV-1 infection in PWH.
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Affiliation(s)
- Alice K Min
- Division of Infectious Diseases, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, New York
| | - Trinisia Fortune
- Division of Infectious Diseases, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, New York
| | - Natalia Rodriguez
- Division of Infectious Diseases, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, New York
| | - Esha Hedge
- University of South Carolina, Columbia, South Carolina
| | - Talia H Swartz
- Division of Infectious Diseases, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, New York.
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89
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Iwama RE, Moran Y. Origins and diversification of animal innate immune responses against viral infections. Nat Ecol Evol 2023; 7:182-193. [PMID: 36635343 DOI: 10.1038/s41559-022-01951-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2022] [Accepted: 11/11/2022] [Indexed: 01/14/2023]
Abstract
Immune systems are of pivotal importance to any living organism on Earth, as they protect the organism against deleterious effects of viral infections. Though the current knowledge about these systems is still biased towards the immune response in vertebrates, some studies have focused on the identification and characterization of components of invertebrate antiviral immune systems. Two classic model organisms, the insect Drosophila melanogaster and the nematode Caenorhabditis elegans, were instrumental in the discovery of several important components of the innate immune system, such as the Toll-like receptors and the RNA interference pathway. However, these two model organisms provide only a limited view of the evolutionary history of the immune system, as they both are ecdysozoan protostomes. Recent functional studies in non-classic models such as unicellular holozoans (for example, choanoflagellates), lophotrochozoans (for example, oysters) and cnidarians (for example, sea anemones) have added crucial information for understanding the evolution of antiviral systems, as they revealed unexpected ancestral complexity. This Review aims to summarize this information and present the ancestral nature of the antiviral immune response in animals. We also discuss lineage-specific adaptations and future perspectives for the comparative study of the innate immune system that are essential for understanding its evolution.
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Affiliation(s)
- Rafael E Iwama
- Department of Ecology, Evolution and Behavior, Alexander Silberman Institute of Life Sciences, Faculty of Science, Hebrew University of Jerusalem, Jerusalem, Israel.
| | - Yehu Moran
- Department of Ecology, Evolution and Behavior, Alexander Silberman Institute of Life Sciences, Faculty of Science, Hebrew University of Jerusalem, Jerusalem, Israel.
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90
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Paraskevaidis I, Farmakis D, Papingiotis G, Tsougos E. Inflammation and Heart Failure: Searching for the Enemy-Reaching the Entelechy. J Cardiovasc Dev Dis 2023; 10:jcdd10010019. [PMID: 36661914 PMCID: PMC9866611 DOI: 10.3390/jcdd10010019] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Revised: 12/22/2022] [Accepted: 12/29/2022] [Indexed: 01/06/2023] Open
Abstract
The pivotal role of inflammation in the pathophysiology of heart-failure (HF) development and progression has long been recognized. High blood levels of pro-inflammatory and inflammatory markers are present and associated with adverse outcomes in patients with HF. In addition, there seems to be an interrelation between inflammation and neurohormonal activation, the cornerstone of HF pathophysiology and management. However, clinical trials involving anti-inflammatory agents have shown inconclusive or even contradictory results in improving HF outcomes. In the present review, we try to shed some light on the reciprocal relationship between inflammation and HF in an attempt to identify the central regulating factors, such as inflammatory cells and soluble mediators and the related inflammatory pathways as potential therapeutic targets.
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Affiliation(s)
- Ioannis Paraskevaidis
- Medical School, National and Kapodistrian University of Athens, 11527 Athens, Greece
- 6th Department of Cardiology, Hygeia Hospital, 15123 Athens, Greece
| | - Dimitrios Farmakis
- Medical School, University of Cyprus, 2029 Nicosia, Cyprus
- Correspondence: ; Tel.: +357-22-895235
| | - Georgios Papingiotis
- Department of Cardiology, Attikon University Hospital, National and Kapodistrian University of Athens, 12462 Athens, Greece
| | - Elias Tsougos
- 6th Department of Cardiology, Hygeia Hospital, 15123 Athens, Greece
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91
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Sandstrom A. NLRP1 activation by UVB: Shedding light on an enigmatic inflammasome. J Exp Med 2023; 220:e20221720. [PMID: 36374226 PMCID: PMC9665900 DOI: 10.1084/jem.20221720] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
In this issue of JEM, Jenster et al. (2022. J. Exp. Med. https://doi.org/10.1084/jem.20220837) investigate how UVB radiation promotes activation of the inflammatory immune sensor NLRP1, and in doing so uncover how NLRP1 recognizes a diverse range of ribotoxic stresses.
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Affiliation(s)
- Andrew Sandstrom
- Department of Immunology, University of Texas Southwestern Medical Center, Dallas, TX
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92
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Sivaraman H, Wong W. Expression and Purification of Inflammasome Sensor NOD-Like Receptor Protein-1 Using the Baculovirus-Insect Cell Expression System. Methods Mol Biol 2023; 2691:199-206. [PMID: 37355547 DOI: 10.1007/978-1-0716-3331-1_15] [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: 06/26/2023]
Abstract
Inflammasomes are innate immune sensing and signaling complexes critical for defense against pathogens and response to cellular stresses. A core component of inflammasomes is the sensor protein, which, upon sensing pathogen- or danger-associated molecular patterns (PAMPs or DAMPs), converts from inactive to active signaling platform for initiation of inflammatory signaling. A reliable source for the production and purification of recombinant inflammasome sensors is therefore invaluable for biochemical and structural characterizations, as well as drug screening for the development of therapeutics. Here, we describe an expression and purification protocol using the baculovirus-insect cell expression system to generate recombinant NLRP1, an important member of the NOD-like receptor (NLR) family of inflammasome sensors.
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Affiliation(s)
- Hariharan Sivaraman
- Centre for Innate Immunity and Infectious Diseases, Centre for Cancer Research, Hudson Institute of Medical Research, Melbourne, Clayton, VIC, Australia
- Department of Molecular and Translational Science, School of Clinical Sciences, Monash University, Clayton, VIC, Australia
| | - Wilson Wong
- Centre for Innate Immunity and Infectious Diseases, Centre for Cancer Research, Hudson Institute of Medical Research, Melbourne, Clayton, VIC, Australia.
- Department of Molecular and Translational Science, School of Clinical Sciences, Monash University, Clayton, VIC, Australia.
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93
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Saller BS, Neuwirt E, Groß O. Methods to Activate the NLRP3 Inflammasome. Methods Mol Biol 2023; 2696:169-197. [PMID: 37578723 DOI: 10.1007/978-1-0716-3350-2_12] [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
The inflammasome-nucleating cytoplasmic sensor protein NLRP3 (NACHT-, LRR, and PYD domains-containing protein 3, also known as NOD-like receptor pyrin domain-containing 3, NALP3, or cryopyrin) is triggered by a broad spectrum of sterile endogenous danger signals and environmental irritants. Upon activation, NLRP3 engages the adapter protein ASC that in turn recruits the third inflammasome component, the protease caspase-1. Subsequent caspase-1 activation leads to its auto-processing and maturation of the leaderless IL-1 family cytokines IL-1β and IL-18 as well as cleavage of the pore-forming protein Gasdermin D (GSDMD). GSDMD plasma membrane pores, formed by its N-terminus, facilitate IL-1 release and, typically, subsequent cell lysis (pyroptosis). This protocol explains standard methods, which are routinely used in our laboratory to study NLRP3 inflammasome biology in vitro. It includes experimental approaches using primary murine bone marrow-derived macrophages (BMDMs) and bone marrow-derived dendritic cells (BMDCs), human peripheral blood mononuclear cells (PBMCs), as well as inflammasome-competent cell lines (HoxB8 and THP-1 cells). The protocol covers the use of a broad spectrum of established NLRP3 activators and outlines the use of common inhibitors blocking NLRP3 itself or its upstream triggering events. We also provide guidelines for experimental set-up and crucial experimental controls to investigate NLRP3 inflammasome signaling or study new activators and inhibitors.
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Affiliation(s)
- Benedikt S Saller
- Faculty of Medicine, Institute of Neuropathology, Medical Center - University of Freiburg, Freiburg, Germany
- Faculty of Biology, University of Freiburg, Freiburg, Germany
| | - Emilia Neuwirt
- Faculty of Medicine, Institute of Neuropathology, Medical Center - University of Freiburg, Freiburg, Germany
- Faculty of Biology, University of Freiburg, Freiburg, Germany
- Signalling Research Centres BIOSS and CIBSS, University of Freiburg, Freiburg, Germany
| | - Olaf Groß
- Faculty of Medicine, Institute of Neuropathology, Medical Center - University of Freiburg, Freiburg, Germany.
- Signalling Research Centres BIOSS and CIBSS, University of Freiburg, Freiburg, Germany.
- Faculty of Medicine, Center for Basics in NeuroModulation (NeuroModulBasics), University of Freiburg, Freiburg, Germany.
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94
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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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95
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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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96
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Leal VNC, Pontillo A. Canonical Inflammasomes. Methods Mol Biol 2023; 2696:1-27. [PMID: 37578712 DOI: 10.1007/978-1-0716-3350-2_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] [Indexed: 08/15/2023]
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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97
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High p62 expression suppresses the NLRP1 inflammasome and increases stress resistance in cutaneous SCC cells. Cell Death Dis 2022; 13:1077. [PMID: 36581625 PMCID: PMC9800582 DOI: 10.1038/s41419-022-05530-0] [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: 06/15/2022] [Revised: 12/15/2022] [Accepted: 12/20/2022] [Indexed: 12/30/2022]
Abstract
NLRP1 is the primary inflammasome sensor in human keratinocytes. Sensing of UVB radiation by NLRP1 is believed to underlie the induction of sunburn. Although constitutive NLRP1 activation causes skin inflammation and predisposes patients to the development of cutaneous SCCs, the NLRP1 pathway is suppressed in established SCCs. Here, we identified high levels of the autophagy receptor p62 in SCC cells lines and SCC tumors. Increased NF-κB activity in SCC cells causes p62 up-regulation. Suppression of p62 expression rescues UVB-induced NLRP1 inflammasome activation in early-stage SCC cells. p62 expression protects SCC cells from cytotoxic drugs, whereas NLRP1 sensitizes them. In summary, we identify p62 as a novel negative regulator of the NLRP1 inflammasome in human cutaneous SCC cells, in which suppression of NLRP1 by increased levels of p62 supports stress resistance of skin cancer cells.
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98
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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: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [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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99
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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: 26] [Impact Index Per Article: 13.0] [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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100
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Waldstein KA, Varga SM. Respiratory viruses and the inflammasome: The double-edged sword of inflammation. PLoS Pathog 2022; 18:e1011014. [PMID: 36580480 PMCID: PMC9799286 DOI: 10.1371/journal.ppat.1011014] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Affiliation(s)
- Kody A. Waldstein
- Interdisciplinary Graduate Program in Immunology, University of Iowa, Iowa City, Iowa, United Stated of America
| | - Steven M. Varga
- Interdisciplinary Graduate Program in Immunology, University of Iowa, Iowa City, Iowa, United Stated of America
- Department of Microbiology and Immunology, University of Iowa, Iowa City, Iowa, United Stated of America
- Department of Pathology, University of Iowa, Iowa City, Iowa, United Stated of America
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