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Lu HF, Zhou YC, Hu TY, Yang DH, Wang XJ, Luo DD, Qiu SQ, Cheng BH, Zeng XH. Unraveling the role of NLRP3 inflammasome in allergic inflammation: implications for novel therapies. Front Immunol 2024; 15:1435892. [PMID: 39131161 PMCID: PMC11310156 DOI: 10.3389/fimmu.2024.1435892] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2024] [Accepted: 07/15/2024] [Indexed: 08/13/2024] Open
Abstract
Allergic diseases like asthma, allergic rhinitis and dermatitis pose a significant global health burden, driving the search for novel therapies. The NLRP3 inflammasome, a key component of the innate immune system, is implicated in various inflammatory diseases. Upon exposure to allergens, NLRP3 undergoes a two-step activation process (priming and assembly) to form active inflammasomes. These inflammasomes trigger caspase-1 activation, leading to the cleavage of pro-inflammatory cytokines (IL-1β and IL-18) and GSDMD. This process induces pyroptosis and amplifies inflammation. Recent studies in humans and mice strongly suggest a link between the NLRP3 inflammasome, IL-1β, and IL-18, and the development of allergic diseases. However, further research is needed to fully understand NLRP3's specific mechanisms in allergies. This review aims to summarize the latest advances in NLRP3 activation and regulation. We will discuss small molecule drugs and natural products targeting NLRP3 as potential therapeutic strategies for allergic diseases.
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Affiliation(s)
- Hui-Fei Lu
- Zhuhai Campus of Zunyi Medical University, Zhuhai, China
- Department of Otolaryngology, Longgang Otolaryngology Hospital & Shenzhen Otolaryngology Research, Shenzhen, China
| | - Yi-Chi Zhou
- Department of Gastroenterology, Beijing University of Chinese Medicine Shenzhen Hospital (Longgang), Shenzhen, China
| | - Tian-Yong Hu
- Department of Otolaryngology, Longgang Otolaryngology Hospital & Shenzhen Otolaryngology Research, Shenzhen, China
| | - Dun-Hui Yang
- Department of Otolaryngology, Longgang Otolaryngology Hospital & Shenzhen Otolaryngology Research, Shenzhen, China
| | - Xi-Jia Wang
- Zhuhai Campus of Zunyi Medical University, Zhuhai, China
- Department of Otolaryngology, Longgang Otolaryngology Hospital & Shenzhen Otolaryngology Research, Shenzhen, China
| | - Dan-Dan Luo
- Zhuhai Campus of Zunyi Medical University, Zhuhai, China
- Department of Otolaryngology, Longgang Otolaryngology Hospital & Shenzhen Otolaryngology Research, Shenzhen, China
| | - Shu-Qi Qiu
- Zhuhai Campus of Zunyi Medical University, Zhuhai, China
- Department of Otolaryngology, Longgang Otolaryngology Hospital & Shenzhen Otolaryngology Research, Shenzhen, China
| | - Bao-Hui Cheng
- Zhuhai Campus of Zunyi Medical University, Zhuhai, China
- Department of Otolaryngology, Longgang Otolaryngology Hospital & Shenzhen Otolaryngology Research, Shenzhen, China
| | - Xian-Hai Zeng
- Department of Otolaryngology, Longgang Otolaryngology Hospital & Shenzhen Otolaryngology Research, Shenzhen, China
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Shippy DC, Evered AH, Ulland TK. Ketone body metabolism and the NLRP3 inflammasome in Alzheimer's disease. Immunol Rev 2024. [PMID: 38989642 DOI: 10.1111/imr.13365] [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] [Indexed: 07/12/2024]
Abstract
Alzheimer's disease (AD) is a degenerative brain disorder and the most common form of dementia. AD pathology is characterized by senile plaques and neurofibrillary tangles (NFTs) composed of amyloid-β (Aβ) and hyperphosphorylated tau, respectively. Neuroinflammation has been shown to drive Aβ and tau pathology, with evidence suggesting the nod-like receptor family pyrin domain containing 3 (NLRP3) inflammasome as a key pathway in AD pathogenesis. NLRP3 inflammasome activation in microglia, the primary immune effector cells of the brain, results in caspase-1 activation and secretion of IL-1β and IL-18. Recent studies have demonstrated a dramatic interplay between the metabolic state and effector functions of immune cells. Microglial metabolism in AD is of particular interest, as ketone bodies (acetone, acetoacetate (AcAc), and β-hydroxybutyrate (BHB)) serve as an alternative energy source when glucose utilization is compromised in the brain of patients with AD. Furthermore, reduced cerebral glucose metabolism concomitant with increased BHB levels has been demonstrated to inhibit NLRP3 inflammasome activation. Here, we review the role of the NLRP3 inflammasome and microglial ketone body metabolism in AD pathogenesis. We also highlight NLRP3 inflammasome inhibition by several ketone body therapies as a promising new treatment strategy for AD.
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Affiliation(s)
- Daniel C Shippy
- Department of Pathology and Laboratory Medicine, School of Medicine and Public Health, University of Wisconsin, Madison, Wisconsin, USA
| | - Abigail H Evered
- Department of Pathology and Laboratory Medicine, School of Medicine and Public Health, University of Wisconsin, Madison, Wisconsin, USA
- Cellular and Molecular Pathology Graduate Program, School of Medicine and Public Health, University of Wisconsin, Madison, Wisconsin, USA
| | - Tyler K Ulland
- Department of Pathology and Laboratory Medicine, School of Medicine and Public Health, University of Wisconsin, Madison, Wisconsin, USA
- Wisconsin Alzheimer's Disease Research Center, School of Medicine and Public Health, University of Wisconsin, Madison, Wisconsin, USA
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Márquez-Flores YK, Martínez-Galero E, Correa-Basurto J, Sixto-López Y, Villegas I, Rosillo MÁ, Cárdeno A, Alarcón-de-la-Lastra C. Daidzein and Equol: Ex Vivo and In Silico Approaches Targeting COX-2, iNOS, and the Canonical Inflammasome Signaling Pathway. Pharmaceuticals (Basel) 2024; 17:647. [PMID: 38794217 PMCID: PMC11124169 DOI: 10.3390/ph17050647] [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: 02/22/2024] [Revised: 03/22/2024] [Accepted: 05/08/2024] [Indexed: 05/26/2024] Open
Abstract
BACKGROUND The inflammasome is a cytosolic multiprotein complex associated with multiple autoimmune diseases. Phytochemical compounds in soy (Glycine max) foods, such as isoflavones, have been reported for their anti-inflammatory properties. AIM the anti-inflammatory activity of DZ (daidzein) and EQ (equol) were investigated in an ex vivo model of LPS-stimulated murine peritoneal macrophages and by molecular docking correlation. METHODS Cells were pre-treated with DZ (25, 50, and 100 µM) or EQ (5, 10, and 25 µM), followed by LPS stimulation. The levels of PGE2, NO, TNF-α, IL-6, and IL-1β were analyzed by ELISA, whereas the expressions of COX-2, iNOS, NLRP3, ASC, caspase 1, and IL-18 were measured by Western blotting. Also, the potential for transcriptional modulation by targeting NF-κB, COX-2, iNOS, NLRP3, ASC, and caspase 1 was investigated by molecular docking. RESULTS The anti-inflammatory responses observed may be due to the modulation of NF-κB due to the binding of DZ or EQ, which is translated into decreased TNF-α, COX-2, iNOS, NLRP3, and ASC levels. CONCLUSION This study establishes that DZ and EQ inhibit LPS-induced inflammatory responses in peritoneal murine macrophages via down-regulation of NO and PGE2 generation, as well as the inhibition of the canonical inflammasome pathway, regulating NLRP3, and consequently decreasing IL-1β and IL-18 activation.
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Affiliation(s)
- Yazmín K. Márquez-Flores
- Departamento de Farmacia, Escuela Nacional de Ciencias Biológicas, Campus Zacatenco, Instituto Politécnico Nacional, Av. Wilfrido Massieu s/n Col. Zacatenco, Mexico City C.P. 07738, Mexico;
| | - Elizdath Martínez-Galero
- Departamento de Farmacia, Escuela Nacional de Ciencias Biológicas, Campus Zacatenco, Instituto Politécnico Nacional, Av. Wilfrido Massieu s/n Col. Zacatenco, Mexico City C.P. 07738, Mexico;
| | - José Correa-Basurto
- Laboratorio de Diseño y Desarrollo de Nuevos Fármacos y Productos Biotecnológicos, Escuela Superior de Medicina, Instituto Politécnico Nacional, Plan de San Luis y Díaz Mirón s/n, Col. Santo Tomas, Mexico City C.P. 11340, Mexico; (J.C.-B.); (Y.S.-L.)
| | - Yudibeth Sixto-López
- Laboratorio de Diseño y Desarrollo de Nuevos Fármacos y Productos Biotecnológicos, Escuela Superior de Medicina, Instituto Politécnico Nacional, Plan de San Luis y Díaz Mirón s/n, Col. Santo Tomas, Mexico City C.P. 11340, Mexico; (J.C.-B.); (Y.S.-L.)
- Departamento de Química Farmacéutica y Orgánica, Facultad de Farmacia, Campus de Cartuja, Universidad de Granada, 18071 Granada, Spain
| | - Isabel Villegas
- Department of Pharmacology, Faculty of Pharmacy, University of Seville, Professor García González Street 2, 41012 Seville, Spain; (I.V.); (A.C.); (C.A.-d.-l.-L.)
| | - María Á. Rosillo
- Department of Pharmacology, Faculty of Pharmacy, University of Seville, Professor García González Street 2, 41012 Seville, Spain; (I.V.); (A.C.); (C.A.-d.-l.-L.)
| | - Ana Cárdeno
- Department of Pharmacology, Faculty of Pharmacy, University of Seville, Professor García González Street 2, 41012 Seville, Spain; (I.V.); (A.C.); (C.A.-d.-l.-L.)
| | - Catalina Alarcón-de-la-Lastra
- Department of Pharmacology, Faculty of Pharmacy, University of Seville, Professor García González Street 2, 41012 Seville, Spain; (I.V.); (A.C.); (C.A.-d.-l.-L.)
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Silva F, Boal-Carvalho I, Williams N, Chabert M, Niu C, Hedhili D, Choltus H, Liaudet N, Gaïa N, Karenovics W, Francois P, Schmolke M. Identification of a short sequence motif in the influenza A virus pathogenicity factor PB1-F2 required for inhibition of human NLRP3. J Virol 2024; 98:e0041124. [PMID: 38567952 PMCID: PMC11092369 DOI: 10.1128/jvi.00411-24] [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: 03/04/2024] [Accepted: 03/14/2024] [Indexed: 05/15/2024] Open
Abstract
Influenza A virus infection activates the NLRP3 inflammasome, a multiprotein signaling complex responsible for the proteolytic activation and release of the proinflammatory cytokine IL-1β from monocytes and macrophages. Some influenza A virus (IAV) strains encode a short 90-amino acid peptide (PB1-F2) on an alternative open reading frame of segment 2, with immunomodulatory activity. We recently demonstrated that contemporary IAV PB1-F2 inhibits the activation of NLRP3, potentially by NEK7-dependent activation. PB1-F2 binds to NLRP3 with its C-terminal 50 amino acids, but the exact binding motif was unknown. On the NLRP3 side, the interface is formed through the leucine-rich-repeat (LRR) domain, potentially in conjunction with the pyrin domain. Here, we took advantage of PB1-F2 sequences from IAV strains with either weak or strong NLRP3 interaction. Sequence comparison and structure prediction using Alphafold2 identified a short four amino acid sequence motif (TQGS) in PB1-F2 that defines NLRP3-LRR binding. Conversion of this motif to that of the non-binding PB1-F2 suffices to lose inhibition of NLRP3 dependent IL-1β release. The TQGS motif further alters the subcellular localization of PB1-F2 and its colocalization with NLRP3 LRR and pyrin domain. Structural predictions suggest the establishment of additional hydrogen bonds between the C-terminus of PB1-F2 and the LRR domain of NLRP3, with two hydrogen bonds connecting to threonine and glutamine of the TQGS motif. Phylogenetic data show that the identified NLRP3 interaction motif in PB1-F2 is widely conserved among recent IAV-infecting humans. Our data explain at a molecular level the specificity of NLRP3 inhibition by influenza A virus. IMPORTANCE Influenza A virus infection is accompanied by a strong inflammatory response and high fever. The human immune system facilitates the swift clearance of the virus with this response. An essential signal protein in the proinflammatory host response is IL-1b. It is released from inflammatory macrophages, and its production and secretion depend on the function of NLRP3. We had previously shown that influenza A virus blocks NLRP3 activation by the expression of a viral inhibitor, PB1-F2. Here, we demonstrate how this short peptide binds to NLRP3 and provide evidence that a four amino acid stretch in PB1-F2 is necessary and sufficient to mediate this binding. Our data identify a new virus-host interface required to block one signaling path of the innate host response against influenza A virus.
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Affiliation(s)
- Filo Silva
- Department of Microbiology and Molecular Medicine, Medical Faculty, University of Geneva, Geneva, Switzerland
| | - Inês Boal-Carvalho
- Department of Microbiology and Molecular Medicine, Medical Faculty, University of Geneva, Geneva, Switzerland
| | - Nathalia Williams
- Department of Microbiology and Molecular Medicine, Medical Faculty, University of Geneva, Geneva, Switzerland
| | - Mehdi Chabert
- Department of Microbiology and Molecular Medicine, Medical Faculty, University of Geneva, Geneva, Switzerland
| | - Chengyue Niu
- Department of Microbiology and Molecular Medicine, Medical Faculty, University of Geneva, Geneva, Switzerland
| | - Dalila Hedhili
- Department of Microbiology and Molecular Medicine, Medical Faculty, University of Geneva, Geneva, Switzerland
| | - Hélèna Choltus
- Department of Microbiology and Molecular Medicine, Medical Faculty, University of Geneva, Geneva, Switzerland
| | - Nicolas Liaudet
- Bioimaging Core Facility, Medical Faculty, University of Geneva, Geneva, Switzerland
| | - Nadia Gaïa
- Genomic Research Laboratory, Division of Infectious Diseases, Department of Medicine, University Hospitals and University of Geneva, Geneva, Switzerland
| | | | - Patrice Francois
- Department of Microbiology and Molecular Medicine, Medical Faculty, University of Geneva, Geneva, Switzerland
- Thoracic Surgery, Geneva University Hospitals, Geneva, Switzerland
| | - Mirco Schmolke
- Department of Microbiology and Molecular Medicine, Medical Faculty, University of Geneva, Geneva, Switzerland
- Geneva Center for inflammation research, Medical Faculty, University of Geneva, Geneva, Switzerland
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Xiao Y, Zhang Y, Xie K, Huang X, Liu X, Luo J, Tan S. Mitochondrial Dysfunction by FADDosome Promotes Gastric Mucosal Injury in Portal Hypertensive Gastropathy. Int J Biol Sci 2024; 20:2658-2685. [PMID: 38725851 PMCID: PMC11077381 DOI: 10.7150/ijbs.90835] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2023] [Accepted: 04/15/2024] [Indexed: 05/12/2024] Open
Abstract
Mucosal epithelial death is an essential pathological characteristic of portal hypertensive gastropathy (PHG). FADDosome can regulate mucosal homeostasis by controlling mitochondrial status and cell death. However, it remains ill-defined whether and how the FADDosome is involved in the epithelial death of PHG. The FADDosome formation, mitochondrial dysfunction, glycolysis process and NLRP3 inflammasome activation in PHG from both human sections and mouse models were investigated. NLRP3 wild-type (NLRP3-WT) and NLRP3 knockout (NLRP3-KO) littermate models, critical element inhibitors and cell experiments were utilized. The mechanism underlying FADDosome-regulated mitochondrial dysfunction and epithelial death in PHG was explored. Here, we found that FADD recruited caspase-8 and receptor-interacting serine/threonine-protein kinase 1 (RIPK1) to form the FADDosome to promote Drp1-dependent mitochondrial fission and dysfunction in PHG. Also, FADDosome modulated NOX2 signaling to strengthen Drp1-dependent mitochondrial fission and alter glycolysis as well as enhance mitochondrial reactive oxygen species (mtROS) production. Moreover, due to the dysfunction of electron transport chain (ETC) and alteration of antioxidant enzymes activity, this altered glycolysis also contributed to mtROS production. Subsequently, the enhanced mtROS production induced NLRP3 inflammasome activation to result in the epithelial pyroptosis and mucosal injury in PHG. Thus, the FADDosome-regulated pathways may provide a potential therapeutic target for PHG.
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Affiliation(s)
- Yuelin Xiao
- Department of Gastroenterology, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong Province, 510630, China
| | - Yiwang Zhang
- Department of Pathology, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong Province, 510630, China
| | - Kaiduan Xie
- Department of Gastroenterology, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong Province, 510630, China
| | - Xiaoli Huang
- Department of Gastroenterology, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong Province, 510630, China
| | - Xianzhi Liu
- Department of Gastroenterology, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong Province, 510630, China
| | - Jinni Luo
- Department of Gastroenterology, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong Province, 510630, China
| | - Siwei Tan
- Department of Gastroenterology, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong Province, 510630, China
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Park H, Ko R, Seo J, Ahn GY, Choi SW, Kwon M, Lee SY. Octyl gallate has potent anti-inflammasome activity by directly binding to NLRP3 LRR domain. J Cell Physiol 2024; 239:e31196. [PMID: 38240115 DOI: 10.1002/jcp.31196] [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: 08/09/2023] [Revised: 01/03/2024] [Accepted: 01/08/2024] [Indexed: 04/12/2024]
Abstract
The NOD-, LRR-, and Pyrin domain-containing protein 3 (NLRP3) inflammasome plays key roles in regulating inflammation. Numerous studies show that the abnormal activation of NLRP3 associates with the initiation and progression of various diseases. Hence, the NLRP3 inflammasome may be a promising therapeutic target for these diseases. Octyl gallate (OG) is a small molecule with antioxidant, antimicrobial, antifungal, and anti-inflammatory activities; however, the mechanism underlying its anti-inflammatory activity is still unclear. Here, we developed a screening system for NLRP3-inflammasome inhibitors. A total of 3287 small molecules were screened for inhibitors of nigericin-induced NLRP3 oligomerization. OG was identified as a novel inhibitor. We show that OG directly targets the LRR domain of NLRP3 and thereby blocks the inflammatory cascade of the NLRP3 inflammasome. This contrasts with the mode-of-action of other direct NLRP3 inhibitors, which all bind to the NACHT domain of NLRP3. Interestingly, OG also inhibits the priming step by downregulating the Raf-MEK1/2-ERK1/2 axis. Thus, OG inhibits the NLRP3 inflammasome by two distinct mechanisms. Importantly, OG injection ameliorated the inflammation in mouse models of foot gout and sepsis. Our study identifies OG as a potential therapeutic agent for NLRP3-associated diseases.
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Affiliation(s)
- Hana Park
- Department of Life Science, Ewha Womans University, Seoul, South Korea
- The Research Center for Cellular Homeostasis, Ewha Womans University, Seoul, South Korea
| | - Ryeojin Ko
- Department of Life Science, Ewha Womans University, Seoul, South Korea
- The Research Center for Cellular Homeostasis, Ewha Womans University, Seoul, South Korea
| | - Jeongin Seo
- Department of Life Science, Ewha Womans University, Seoul, South Korea
| | - Guk Young Ahn
- Department of Biotechnology, Biomedical and Chemical Engineering, The Catholic University of Korea, Gyeonggi-do, South Korea
| | - Sung-Wook Choi
- Department of Biotechnology, Biomedical and Chemical Engineering, The Catholic University of Korea, Gyeonggi-do, South Korea
| | - Mijung Kwon
- Department of Life Science, Ewha Womans University, Seoul, South Korea
- The Research Center for Cellular Homeostasis, Ewha Womans University, Seoul, South Korea
- Multitasking Macrophage Research Center, Ewha Womans University, Seoul, South Korea
| | - Soo Young Lee
- Department of Life Science, Ewha Womans University, Seoul, South Korea
- The Research Center for Cellular Homeostasis, Ewha Womans University, Seoul, South Korea
- Multitasking Macrophage Research Center, Ewha Womans University, Seoul, South Korea
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Flis W, Socha MW. The Role of the NLRP3 Inflammasome in the Molecular and Biochemical Mechanisms of Cervical Ripening: A Comprehensive Review. Cells 2024; 13:600. [PMID: 38607039 PMCID: PMC11012148 DOI: 10.3390/cells13070600] [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: 02/23/2024] [Revised: 03/27/2024] [Accepted: 03/27/2024] [Indexed: 04/13/2024] Open
Abstract
The uterine cervix is one of the key factors involved in ensuring a proper track of gestation and labor. At the end of the gestational period, the cervix undergoes extensive changes, which can be summarized as a transformation from a non-favorable cervix to one that is soft and prone to dilation. During a process called cervical ripening, fundamental remodeling of the cervical extracellular matrix (ECM) occurs. The cervical ripening process is a derivative of many interlocking and mutually driving biochemical and molecular pathways under the strict control of mediators such as inflammatory cytokines, nitric oxide, prostaglandins, and reactive oxygen species. A thorough understanding of all these pathways and learning about possible triggering factors will allow us to develop new, better treatment algorithms and therapeutic goals that could protect women from both dysfunctional childbirth and premature birth. This review aims to present the possible role of the NLRP3 inflammasome in the cervical ripening process, emphasizing possible mechanisms of action and regulatory factors.
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Affiliation(s)
- Wojciech Flis
- Department of Perinatology, Gynecology and Gynecologic Oncology, Faculty of Health Sciences, Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University, Łukasiewicza 1, 85-821 Bydgoszcz, Poland;
- Department of Obstetrics and Gynecology, St. Adalbert’s Hospital in Gdańsk, Copernicus Healthcare Entity, Jana Pawła II 50, 80-462 Gdańsk, Poland
| | - Maciej W. Socha
- Department of Perinatology, Gynecology and Gynecologic Oncology, Faculty of Health Sciences, Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University, Łukasiewicza 1, 85-821 Bydgoszcz, Poland;
- Department of Obstetrics and Gynecology, St. Adalbert’s Hospital in Gdańsk, Copernicus Healthcare Entity, Jana Pawła II 50, 80-462 Gdańsk, Poland
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Korhonen E. Inflammasome activation in response to aberrations of cellular homeostasis in epithelial cells from human cornea and retina. Acta Ophthalmol 2024; 102 Suppl 281:3-68. [PMID: 38386419 DOI: 10.1111/aos.16646] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2024] [Accepted: 01/16/2024] [Indexed: 02/24/2024]
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Yao J, Sterling K, Wang Z, Zhang Y, Song W. The role of inflammasomes in human diseases and their potential as therapeutic targets. Signal Transduct Target Ther 2024; 9:10. [PMID: 38177104 PMCID: PMC10766654 DOI: 10.1038/s41392-023-01687-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2022] [Revised: 09/18/2023] [Accepted: 10/13/2023] [Indexed: 01/06/2024] Open
Abstract
Inflammasomes are large protein complexes that play a major role in sensing inflammatory signals and triggering the innate immune response. Each inflammasome complex has three major components: an upstream sensor molecule that is connected to a downstream effector protein such as caspase-1 through the adapter protein ASC. Inflammasome formation typically occurs in response to infectious agents or cellular damage. The active inflammasome then triggers caspase-1 activation, followed by the secretion of pro-inflammatory cytokines and pyroptotic cell death. Aberrant inflammasome activation and activity contribute to the development of diabetes, cancer, and several cardiovascular and neurodegenerative disorders. As a result, recent research has increasingly focused on investigating the mechanisms that regulate inflammasome assembly and activation, as well as the potential of targeting inflammasomes to treat various diseases. Multiple clinical trials are currently underway to evaluate the therapeutic potential of several distinct inflammasome-targeting therapies. Therefore, understanding how different inflammasomes contribute to disease pathology may have significant implications for developing novel therapeutic strategies. In this article, we provide a summary of the biological and pathological roles of inflammasomes in health and disease. We also highlight key evidence that suggests targeting inflammasomes could be a novel strategy for developing new disease-modifying therapies that may be effective in several conditions.
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Affiliation(s)
- Jing Yao
- The National Clinical Research Center for Geriatric Disease, Xuanwu Hospital, Capital Medical University, Beijing, 100053, China
| | - Keenan Sterling
- Townsend Family Laboratories, Department of Psychiatry, Brain Research Center, The University of British Columbia, 2255 Wesbrook Mall, Vancouver, BC, V6T 1Z3, Canada
| | - Zhe Wang
- The National Clinical Research Center for Geriatric Disease, Xuanwu Hospital, Capital Medical University, Beijing, 100053, China
| | - Yun Zhang
- The National Clinical Research Center for Geriatric Disease, Xuanwu Hospital, Capital Medical University, Beijing, 100053, China.
- Key Laboratory of Neurodegenerative Diseases, Ministry of Education, Beijing, P.R. China.
| | - Weihong Song
- The National Clinical Research Center for Geriatric Disease, Xuanwu Hospital, Capital Medical University, Beijing, 100053, China.
- Townsend Family Laboratories, Department of Psychiatry, Brain Research Center, The University of British Columbia, 2255 Wesbrook Mall, Vancouver, BC, V6T 1Z3, Canada.
- Zhejiang Clinical Research Center for Mental Disorders, Key Laboratory of Alzheimer's Disease of Zhejiang Province, School of Mental Health and The Affiliated Kangning Hospital, Institute of Aging, Wenzhou Medical University, Wenzhou, Zhejiang, 325000, China.
- Oujiang Laboratory (Zhejiang Lab for Regenerative Medicine, Vision and Brain Health), Wenzhou, Zhejiang, 325000, China.
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Chamanara S, Hozouri V, Irandoost E. Inhibition of NLRP3 inflammasome-A potential mechanistic therapeutic for treatment of polycystic ovary syndrome? J Biochem Mol Toxicol 2024; 38:e23592. [PMID: 38054794 DOI: 10.1002/jbt.23592] [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: 05/02/2023] [Revised: 11/05/2023] [Accepted: 11/20/2023] [Indexed: 12/07/2023]
Abstract
This review article explores the relationship between the NOD-like receptor protein 3 (NLRP3) inflammasome and the risk of developing polycystic ovary syndrome (PCOS). The NLRP3 inflammasome, a fundamental element of the innate immune system, plays a crucial role in the production of proinflammatory mediators and pyroptosis, a type inflammatory cell death. We conducted a thorough search on scientific databases to gather relevant information on this topic, utilizing relevant keywords. The reviewed studies indicated a correlation between PCOS and a higher incidence of granulosa cell (GC) death and the presence of ovarian tissue fibrosis. NLRP3 inflammasome stimulation and subsequent pyroptosis in GCs play a significant role in the pathophysiology of PCOS. Active NLRP3 inflammasome is involved in the production of inflammatory mediators like interleukin-1β (IL-1β) and IL-18, contributing to the development of PCOS, particularly in overweight patients. Therefore, inhibiting NLRP3 activation and pyroptosis could potentially offer novel therapeutic strategies for PCOS. Some limited studies have explored the use of agents with antioxidant and anti-inflammatory properties, as well as gene therapy approaches, to target the NLRP3 and pyroptosis signaling pathways. This study overview the understanding of the relationship between NLRP3 inflammasome activation, pyroptosis, and PCOS. It highlights the potential of targeting the NLRP3 inflammasome as an approach for treating PCOS. Nonetheless, further research and clinical trials are imperative to validate these results and explore the effectiveness of NLRP3 inflammasome inhibition in the management of PCOS.
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Affiliation(s)
- Solmaz Chamanara
- Department of Gynecology and Obstetrics, Qazvin University of Medical Sciences, Qazvin, Iran
| | - Vahid Hozouri
- Internal Medicine Department, Qazvin University of Medical Sciences, Qazvin, Iran
| | - Elnaz Irandoost
- Department of Gynecology and Obstetrics, Tehran University of Medical Sciences, Tehran, Iran
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11
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Gaspar-Morales EA, Waterston A, Sadqi M, Diaz-Parga P, Smith AM, Gopinath A, Andresen Eguiluz RC, de Alba E. Natural and Engineered Isoforms of the Inflammasome Adaptor ASC Form Noncovalent, pH-Responsive Hydrogels. Biomacromolecules 2023; 24:5563-5577. [PMID: 37930828 DOI: 10.1021/acs.biomac.3c00409] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2023]
Abstract
The protein ASC polymerizes into intricate filament networks to assemble the inflammasome, a filamentous multiprotein complex that triggers the inflammatory response. ASC carries two Death Domains integrally involved in protein self-association for filament assembly. We have leveraged this behavior to create noncovalent, pH-responsive hydrogels of full-length, folded ASC by carefully controlling the pH as a critical factor in the polymerization process. We show that natural variants of ASC (ASC isoforms) involved in inflammasome regulation also undergo hydrogelation. To further demonstrate this general capability, we engineered proteins inspired by the ASC structure that also form hydrogels. We analyzed the structural network of the natural and engineered protein hydrogels using transmission and scanning electron microscopy and studied their viscoelastic behavior using shear rheology. Our results reveal one of the very few examples of hydrogels created by the self-assembly of globular proteins and domains in their native conformation and show that Death Domains can be used alone or as building blocks to engineer bioinspired hydrogels.
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12
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Sharma M, de Alba E. Assembly mechanism of the inflammasome sensor AIM2 revealed by single molecule analysis. Nat Commun 2023; 14:7957. [PMID: 38042863 PMCID: PMC10693601 DOI: 10.1038/s41467-023-43691-4] [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: 08/18/2022] [Accepted: 11/06/2023] [Indexed: 12/04/2023] Open
Abstract
Pathogenic dsDNA prompts AIM2 assembly leading to the formation of the inflammasome, a multimeric complex that triggers the inflammatory response. The recognition of foreign dsDNA involves AIM2 self-assembly concomitant with dsDNA binding. However, we lack mechanistic and kinetic information on the formation and propagation of the assembly, which can shed light on innate immunity's time response and specificity. Combining optical traps and confocal fluorescence microscopy, we determine here the association and dissociation rates of the AIM2-DNA complex at the single molecule level. We identify distinct mechanisms for oligomer growth via the binding of incoming AIM2 molecules to adjacent dsDNA or direct interaction with bound AIM2 assemblies, resembling primary and secondary nucleation. Through these mechanisms, the size of AIM2 oligomers can increase fourfold in seconds. Finally, our data indicate that single AIM2 molecules do not diffuse/scan along the DNA, suggesting that oligomerization depends on stochastic encounters with DNA and/or DNA-bound AIM2.
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Affiliation(s)
- Meenakshi Sharma
- Department of Bioengineering, School of Engineering, University of California Merced, Merced, California, USA
| | - Eva de Alba
- Department of Bioengineering, School of Engineering, University of California Merced, Merced, California, USA.
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13
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Liu Y, Zhai H, Alemayehu H, Boulanger J, Hopkins LJ, Borgeaud AC, Heroven C, Howe JD, Leigh KE, Bryant CE, Modis Y. Cryo-electron tomography of NLRP3-activated ASC complexes reveals organelle co-localization. Nat Commun 2023; 14:7246. [PMID: 37945612 PMCID: PMC10636019 DOI: 10.1038/s41467-023-43180-8] [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: 06/22/2023] [Accepted: 11/02/2023] [Indexed: 11/12/2023] Open
Abstract
NLRP3 induces caspase-1-dependent pyroptotic cell death to drive inflammation. Aberrant activity of NLRP3 occurs in many human diseases. NLRP3 activation induces ASC polymerization into a single, micron-scale perinuclear punctum. Higher resolution imaging of this signaling platform is needed to understand how it induces pyroptosis. Here, we apply correlative cryo-light microscopy and cryo-electron tomography to visualize ASC/caspase-1 in NLRP3-activated cells. The puncta are composed of branched ASC filaments, with a tubular core formed by the pyrin domain. Ribosomes and Golgi-like or endosomal vesicles permeate the filament network, consistent with roles for these organelles in NLRP3 activation. Mitochondria are not associated with ASC but have outer-membrane discontinuities the same size as gasdermin D pores, consistent with our data showing gasdermin D associates with mitochondria and contributes to mitochondrial depolarization.
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Affiliation(s)
- Yangci Liu
- Molecular Immunity Unit, Department of Medicine, University of Cambridge, MRC Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge, CB2 0QH, UK
- Cambridge Institute of Therapeutic Immunology & Infectious Disease (CITIID), University of Cambridge School of Clinical Medicine, Cambridge, CB2 0AW, UK
| | - Haoming Zhai
- Molecular Immunity Unit, Department of Medicine, University of Cambridge, MRC Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge, CB2 0QH, UK
- Cambridge Institute of Therapeutic Immunology & Infectious Disease (CITIID), University of Cambridge School of Clinical Medicine, Cambridge, CB2 0AW, UK
| | - Helen Alemayehu
- Molecular Immunity Unit, Department of Medicine, University of Cambridge, MRC Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge, CB2 0QH, UK
- Cambridge Institute of Therapeutic Immunology & Infectious Disease (CITIID), University of Cambridge School of Clinical Medicine, Cambridge, CB2 0AW, UK
| | - Jérôme Boulanger
- MRC Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge, CB2 0QH, UK
| | - Lee J Hopkins
- Department of Medicine, University of Cambridge, Box 157, Level 5, Addenbrooke's Hospital, Cambridge, CB2 0QQ, UK
- Department of Veterinary Medicine, University of Cambridge, Madingley Road, Cambridge, CB3 0ES, UK
- Wren Therapeutics, Clarendon House, Clarendon Road, Cambridge, CB2 8FH, UK
| | - Alicia C Borgeaud
- MRC Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge, CB2 0QH, UK
- Institute of Biochemistry and Molecular Medicine, University of Bern, Bühlstrasse 28, 3012, Bern, Switzerland
| | - Christina Heroven
- MRC Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge, CB2 0QH, UK
- Division of Structural Biology, University of Oxford, Oxford, OX3 7BN, UK
| | - Jonathan D Howe
- MRC Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge, CB2 0QH, UK
| | - Kendra E Leigh
- Molecular Immunity Unit, Department of Medicine, University of Cambridge, MRC Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge, CB2 0QH, UK
- Cambridge Institute of Therapeutic Immunology & Infectious Disease (CITIID), University of Cambridge School of Clinical Medicine, Cambridge, CB2 0AW, UK
| | - Clare E Bryant
- Department of Medicine, University of Cambridge, Box 157, Level 5, Addenbrooke's Hospital, Cambridge, CB2 0QQ, UK.
- Department of Veterinary Medicine, University of Cambridge, Madingley Road, Cambridge, CB3 0ES, UK.
| | - Yorgo Modis
- Molecular Immunity Unit, Department of Medicine, University of Cambridge, MRC Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge, CB2 0QH, UK.
- Cambridge Institute of Therapeutic Immunology & Infectious Disease (CITIID), University of Cambridge School of Clinical Medicine, Cambridge, CB2 0AW, UK.
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14
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Ahmad B, Achek A, Farooq M, Choi S. Accelerated NLRP3 inflammasome-inhibitory peptide design using a recurrent neural network model and molecular dynamics simulations. Comput Struct Biotechnol J 2023; 21:4825-4835. [PMID: 37854633 PMCID: PMC10579963 DOI: 10.1016/j.csbj.2023.09.038] [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: 02/24/2023] [Revised: 09/27/2023] [Accepted: 09/27/2023] [Indexed: 10/20/2023] Open
Abstract
Anomalous NLRP3 inflammasome responses have been linked to multiple health issues, including but not limited to atherosclerosis, diabetes, metabolic syndrome, cardiovascular disease, and neurodegenerative disease. Thus, targeting NLRP3 and modulating its associated immune response might be a promising strategy for developing new anti-inflammatory drugs. Herein, we report a computational method for de novo peptide design for targeting NLRP3 inflammasomes. The described method leverages a long-short-term memory (LSTM) network based on a recurrent neural network (RNN) to model a valuable latent space of molecules. The resulting classifiers are utilized to guide the selection of molecules generated by the model based on circular dichroism spectra and physicochemical features derived from high-throughput molecular dynamics simulations. Of the experimentally tested sequences, 60% of the peptides showed NLRP3-mediated inhibition of IL-1β and IL-18. One peptide displayed high potency against NLRP3-mediated IL-1β inhibition. However, NLRC4 and AIM2 inflammasome-mediated IL-1β secretion was uninterrupted by this peptide, demonstrating its selectivity toward the NLRP3 inflammasome. Overall, these results indicate that deep learning and molecular dynamics can accelerate the discovery of NLRP3 inhibitors with potent and selective activity.
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Affiliation(s)
- Bilal Ahmad
- Department of Molecular Science and Technology, Ajou University, Suwon 16499, South Korea
- S&K Therapeutics, Ajou University, Campus Plaza 418, Worldcup-ro 199, Yeongtong-gu, Suwon 16502, South Korea
| | - Asma Achek
- Department of Molecular Science and Technology, Ajou University, Suwon 16499, South Korea
- Technology Development Platform, Institut Pasteur Korea, Seongnam 13488, Soouth Korea
| | - Mariya Farooq
- Department of Molecular Science and Technology, Ajou University, Suwon 16499, South Korea
- S&K Therapeutics, Ajou University, Campus Plaza 418, Worldcup-ro 199, Yeongtong-gu, Suwon 16502, South Korea
| | - Sangdun Choi
- Department of Molecular Science and Technology, Ajou University, Suwon 16499, South Korea
- S&K Therapeutics, Ajou University, Campus Plaza 418, Worldcup-ro 199, Yeongtong-gu, Suwon 16502, South Korea
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15
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Li T, Gil Pineda LI, Stevens AO, He Y. Key Factors Regulating the Interdomain Dynamics May Contribute to the Assembly of ASC. BIOLOGY 2023; 12:796. [PMID: 37372082 DOI: 10.3390/biology12060796] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2023] [Revised: 05/26/2023] [Accepted: 05/29/2023] [Indexed: 06/29/2023]
Abstract
The canonical ASC domains, PYD and CARD, are interconnected by a lengthy, semi-flexible linker. The molecular basis and purpose of ASC's highly dynamic feature remain elusive. In this study, all-atom molecular dynamics simulations were utilized to examine the role of the linker and the interdomain dynamics of the ASC monomer. As revealed in the principal component analysis (PCA), the flexible linker enables interdomain dynamics and rotation. The stumbling between domains is partially attributed to the helical portion of N-terminal residues in the linker. Additionally, the linker exhibits a certain structural preference due to the turn-type structural inclination of the N-terminal and the presence of several prolines on the linker. Such structural preferences lead to the unavailability of regions for PYD type I interactions to CARDs, as evidenced by the CARD spatial restraint analysis. In conclusion, the semi-flexible linker introduces functionally relevant interdomain dynamics, potentially enhancing PYD self-assembly and the subsequent assembly of the inflammasome complex.
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Affiliation(s)
- Tongtong Li
- Department of Chemistry & Chemical Biology, The University of New Mexico, Albuquerque, NM 87131, USA
| | - Laura I Gil Pineda
- Department of Chemistry & Chemical Biology, The University of New Mexico, Albuquerque, NM 87131, USA
- Department of Biochemistry, Virginia Tech, 340 West Campus Dr., Blacksburg, VA 24061, USA
| | - Amy O Stevens
- Department of Chemistry & Chemical Biology, The University of New Mexico, Albuquerque, NM 87131, USA
| | - Yi He
- Department of Chemistry & Chemical Biology, The University of New Mexico, Albuquerque, NM 87131, USA
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16
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Gaspar-Morales EA, Waterston A, Diaz-Parga P, Smith AM, Sadqi M, Gopinath A, Andresen Eguiluz RC, de Alba E. Natural and engineered isoforms of the inflammasome adaptor ASC form non-covalent, pH-responsive hydrogels. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.05.03.539154. [PMID: 37205378 PMCID: PMC10187214 DOI: 10.1101/2023.05.03.539154] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
The protein ASC polymerizes into intricate filament networks to assemble the inflammasome, a filamentous multiprotein complex that triggers the inflammatory response. ASC carries two Death Domains integrally involved in protein self-association for filament assembly. We have leveraged this behavior to create non-covalent, pH-responsive hydrogels of full-length, folded ASC by carefully controlling the pH as a critical factor in the polymerization process. We show that natural variants of ASC (ASC isoforms) involved in inflammasome regulation also undergo hydrogelation. To further demonstrate this general capability, we engineered proteins inspired in the ASC structure that successfully form hydrogels. We analyzed the structural network of the natural and engineered protein hydrogels using transmission and scanning electron microscopy, and studied their viscoelastic behavior by shear rheology. Our results reveal one of the very few examples of hydrogels created by the self-assembly of globular proteins and domains in their native conformation and show that Death Domains can be used alone or as building blocks to engineer bioinspired hydrogels.
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17
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Yu TG, Cha JS, Kim G, Sohn YK, Yoo Y, Kim U, Song JJ, Cho HS, Kim HS. Oligomeric states of ASC specks regulate inflammatory responses by inflammasome in the extracellular space. Cell Death Discov 2023; 9:142. [PMID: 37120628 PMCID: PMC10148886 DOI: 10.1038/s41420-023-01438-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2022] [Revised: 04/18/2023] [Accepted: 04/20/2023] [Indexed: 05/01/2023] Open
Abstract
Inflammasomes are multi-protein complexes and play a crucial role in host defense against pathogens. Downstream inflammatory responses through inflammasomes are known to be related to the oligomerization degree of ASC specks, but the detailed mechanism still remains unexplored. Here, we demonstrate that oligomerization degrees of ASC specks regulate the caspase-1 activation in the extracellular space. A protein binder specific for a pyrin domain (PYD) of ASC (ASCPYD) was developed, and structural analysis revealed that the protein binder effectively inhibits the interaction between PYDs, disassembling ASC specks into low oligomeric states. ASC specks with a low oligomerization degree were shown to enhance the activation of caspase-1 by recruiting and processing more premature caspase-1 through interactions between CARD of caspase-1 (caspase-1CARD) and CARD of ASC (ASCCARD). These findings can provide insight into controlling the inflammasome-mediated inflammatory process as well as the development of inflammasome-targeting drugs.
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Affiliation(s)
- Tae-Geun Yu
- Departement of Biological Sciences, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Korea
| | - Jeong Seok Cha
- Department of Systems Biology, College of Life Science and Biotechnology, Yonsei University, Seoul, 03722, Korea
- Research Institute of Pharmacy, Chung-Ang University, Seoul, 06974, Korea
| | - Gijeong Kim
- Departement of Biological Sciences, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Korea
| | - Yoo-Kyoung Sohn
- Departement of Biological Sciences, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Korea
- R&D Center, Sugentech, Inc., Daejeon, Korea
| | - Youngki Yoo
- Department of Systems Biology, College of Life Science and Biotechnology, Yonsei University, Seoul, 03722, Korea
| | - Uijin Kim
- Department of Systems Biology, College of Life Science and Biotechnology, Yonsei University, Seoul, 03722, Korea
| | - Ji-Joon Song
- Departement of Biological Sciences, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Korea
| | - Hyun-Soo Cho
- Department of Systems Biology, College of Life Science and Biotechnology, Yonsei University, Seoul, 03722, Korea
| | - Hak-Sung Kim
- Departement of Biological Sciences, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Korea.
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18
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Abstract
As an important sensor in the innate immune system, NLRP3 detects exogenous pathogenic invasions and endogenous cellular damage and responds by forming the NLRP3 inflammasome, a supramolecular complex that activates caspase-1. The three major components of the NLRP3 inflammasome are NLRP3, which captures the danger signals and recruits downstream molecules; caspase-1, which elicits maturation of the cytokines IL-1β and IL-18 and processing of gasdermin D to mediate cytokine release and pyroptosis; and ASC (apoptosis-associated speck-like protein containing a caspase recruitment domain), which functions as a bridge connecting NLRP3 and caspase-1. In this article, we review the structural information that has been obtained on the NLRP3 inflammasome and its components or subcomplexes, with special focus on the inactive NLRP3 cage, the active NLRP3-NEK7 (NIMA-related kinase 7)-ASC inflammasome disk, and the PYD-PYD and CARD-CARD homotypic filamentous scaffolds of the inflammasome. We further implicate structure-derived mechanisms for the assembly and activation of the NLRP3 inflammasome.
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Affiliation(s)
- Jianing Fu
- Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, Massachusetts, USA;
- Program in Cellular and Molecular Medicine, Boston Children's Hospital, Boston, Massachusetts, USA
| | - Hao Wu
- Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, Massachusetts, USA;
- Program in Cellular and Molecular Medicine, Boston Children's Hospital, Boston, Massachusetts, USA
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19
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The Role of NLRP3, a Star of Excellence in Myeloproliferative Neoplasms. Int J Mol Sci 2023; 24:ijms24054860. [PMID: 36902299 PMCID: PMC10003372 DOI: 10.3390/ijms24054860] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2023] [Revised: 02/23/2023] [Accepted: 02/27/2023] [Indexed: 03/06/2023] Open
Abstract
Nucleotide-binding domain (NOD)-like receptor protein 3 (NLRP3) is the most widely investigated inflammasome member whose overactivation can be a driver of several carcinomas. It is activated in response to different signals and plays an important role in metabolic disorders and inflammatory and autoimmune diseases. NLRP3 belongs to the pattern recognition receptors (PRRs) family, expressed in numerous immune cells, and it plays its primary function in myeloid cells. NLRP3 has a crucial role in myeloproliferative neoplasms (MPNs), considered to be the diseases best studied in the inflammasome context. The investigation of the NLRP3 inflammasome complex is a new horizon to explore, and inhibiting IL-1β or NLRP3 could be a helpful cancer-related therapeutic strategy to improve the existing protocols.
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20
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Brinkschulte R, Fußhöller DM, Hoss F, Rodríguez-Alcázar JF, Lauterbach MA, Kolbe CC, Rauen M, Ince S, Herrmann C, Latz E, Geyer M. ATP-binding and hydrolysis of human NLRP3. Commun Biol 2022; 5:1176. [PMID: 36329210 PMCID: PMC9633759 DOI: 10.1038/s42003-022-04120-2] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2021] [Accepted: 10/17/2022] [Indexed: 11/06/2022] Open
Abstract
The innate immune system uses inflammasomal proteins to recognize danger signals and fight invading pathogens. NLRP3, a multidomain protein belonging to the family of STAND ATPases, is characterized by its central nucleotide-binding NACHT domain. The incorporation of ATP is thought to correlate with large conformational changes in NLRP3, leading to an active state of the sensory protein. Here we analyze the intrinsic ATP hydrolysis activity of recombinant NLRP3 by reverse phase HPLC. Wild-type NLRP3 appears in two different conformational states that exhibit an approximately fourteen-fold different hydrolysis activity in accordance with an inactive, autoinhibited state and an open, active state. The impact of canonical residues in the nucleotide binding site as the Walker A and B motifs and sensor 1 and 2 is analyzed by site directed mutagenesis. Cellular experiments show that reduced NLRP3 hydrolysis activity correlates with higher ASC specking after inflammation stimulation. Addition of the kinase NEK7 does not change the hydrolysis activity of NLRP3. Our data provide a comprehensive view on the function of conserved residues in the nucleotide-binding site of NLRP3 and the correlation of ATP hydrolysis with inflammasome activity. Analysis of the inflammasome-forming protein NLRP3 provides insights into the function of conserved residues in the ATP-binding site of NLRP3 and the correlation of ATP hydrolysis with inflammasome activation.
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Affiliation(s)
- Rebecca Brinkschulte
- Institute of Structural Biology, University of Bonn, Venusberg-Campus 1, 53127, Bonn, Germany
| | - David M Fußhöller
- Institute of Structural Biology, University of Bonn, Venusberg-Campus 1, 53127, Bonn, Germany
| | - Florian Hoss
- Institute of Innate Immunity, University of Bonn, Venusberg-Campus 1, 53127, Bonn, Germany
| | | | - Mario A Lauterbach
- Institute of Innate Immunity, University of Bonn, Venusberg-Campus 1, 53127, Bonn, Germany
| | - Carl-Christian Kolbe
- Institute of Innate Immunity, University of Bonn, Venusberg-Campus 1, 53127, Bonn, Germany
| | - Melanie Rauen
- Institute of Structural Biology, University of Bonn, Venusberg-Campus 1, 53127, Bonn, Germany
| | - Semra Ince
- Physical Chemistry I, Ruhr University Bochum, 44780, Bochum, Germany
| | | | - Eicke Latz
- Institute of Innate Immunity, University of Bonn, Venusberg-Campus 1, 53127, Bonn, Germany
| | - Matthias Geyer
- Institute of Structural Biology, University of Bonn, Venusberg-Campus 1, 53127, Bonn, Germany.
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21
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Wu C, Qiu T, Yuan W, Shi Y, Yao X, Jiang L, Zhang J, Yang G, Liu X, Bai J, Zhao D, Sun X. Annexin A1 inhibition facilitates NLRP3 inflammasome activation in arsenic-induced insulin resistance in rat liver. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2022; 96:103981. [PMID: 36182042 DOI: 10.1016/j.etap.2022.103981] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2022] [Revised: 08/24/2022] [Accepted: 09/26/2022] [Indexed: 06/16/2023]
Abstract
Hepatic insulin resistance (IR) is the primary pathology of type 2 diabetes (T2D). The role of the NOD-like receptor protein 3 (NLRP3) inflammasome in arsenic-induced hepatic IR has been previously demonstrated. However, the mechanism of the arsenic-induced activation of the NLRP3 inflammasome is still unclear. Here, we demonstrate that NaAsO2 downregulated the mRNA and protein level of Annexin A1 (AnxA1), an anti-inflammatory factor, in rat livers and L-02 cells. Moreover, AnxA1 overexpression significantly alleviated arsenic-induced NLRP3 inflammasome activation and IR in L-02 cells. Importantly, Co-immunoprecipitation (Co-IP) results showed that AnxA1 1-190 peptide could bind to the domain encompassing amino acids 1-210 and 211-550 of NLRP3. In conclusion, our experiments demonstrated that arsenic exposure could activate the NLRP3 inflammasome and IR by inhibiting the AnxA1 activity. These findings suggest that AnxA1 may be a promising therapeutic target of arsenicosis.
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Affiliation(s)
- Chenbing Wu
- Department of Occupational and Environmental Health, School of Public Health, Dalian Medical University, No. 9 West Section Lvshun South Road, Dalian 116044, PR China.
| | - Tianming Qiu
- Department of Occupational and Environmental Health, School of Public Health, Dalian Medical University, No. 9 West Section Lvshun South Road, Dalian 116044, PR China.
| | - Weizhuo Yuan
- Department of Occupational and Environmental Health, School of Public Health, Dalian Medical University, No. 9 West Section Lvshun South Road, Dalian 116044, PR China.
| | - Yan Shi
- Department of Occupational and Environmental Health, School of Public Health, Dalian Medical University, No. 9 West Section Lvshun South Road, Dalian 116044, PR China.
| | - Xiaofeng Yao
- Department of Occupational and Environmental Health, School of Public Health, Dalian Medical University, No. 9 West Section Lvshun South Road, Dalian 116044, PR China.
| | - Liping Jiang
- Preventive Medicine Laboratory, School of Public Health, Dalian Medical University, No. 9 West Section Lvshun South Road, 116044, PR China.
| | - Jingyuan Zhang
- Department of Occupational and Environmental Health, School of Public Health, Dalian Medical University, No. 9 West Section Lvshun South Road, Dalian 116044, PR China.
| | - Guang Yang
- Department of Nutrition and Food Safety, School of Public Health, Dalian Medical University, No. 9 West Section Lvshun South Road, Dalian 116044, PR China.
| | - Xiaofang Liu
- Department of Nutrition and Food Safety, School of Public Health, Dalian Medical University, No. 9 West Section Lvshun South Road, Dalian 116044, PR China.
| | - Jie Bai
- Department of Nutrition and Food Safety, School of Public Health, Dalian Medical University, No. 9 West Section Lvshun South Road, Dalian 116044, PR China.
| | - Danyi Zhao
- Department of Gastrointestinal Oncology, The Second Hospital of Dalian Medical University, Dalian, PR China.
| | - Xiance Sun
- Department of Occupational and Environmental Health, School of Public Health, Dalian Medical University, No. 9 West Section Lvshun South Road, Dalian 116044, PR China; Global Health Research Center, Dalian Medical University, No. 9 West Section Lvshun South Road, Dalian 116044, PR China.
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22
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Diaz-Parga P, Gould A, de Alba E. Natural and engineered inflammasome adapter proteins reveal optimum linker length for self-assembly. J Biol Chem 2022; 298:102501. [PMID: 36116550 PMCID: PMC9640978 DOI: 10.1016/j.jbc.2022.102501] [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: 04/07/2022] [Revised: 08/31/2022] [Accepted: 09/13/2022] [Indexed: 11/16/2022] Open
Abstract
The inflammasome is a multiprotein complex that triggers the activation of proinflammatory cytokines. The adapter ASC and its isoform ASCb mediate inflammasome assembly via self-association and oligomerization with other inflammasome proteins by homotypic interactions of their two identical Death Domains, PYD and CARD, connected by a linker of different length: 23 (ASC) and 4 (ASCb) amino acids long. However, ASC is a more potent inflammasome activator compared to ASCb. Thus, adapter isoforms might be involved in the regulation of the inflammatory response. As previously reported, ASC's faster and less polydisperse self-association compared to ASCb points to interdomain flexibility resulting from the linker length as a key factor in inflammasome regulation. To test the influence of linker length in self-association, we have engineered the isoform ASC3X with identical PYD and CARD connected by a 69 amino acid-long linker (i.e., three-times longer than ASC's linker). Real-time NMR and dynamic light scattering data indicate that ASC3X polymerization is less effective and more polydisperse compared to ASC or ASCb. However, transmission electron micrographs show that ASC3X can polymerize into filaments. Comparative interdomain dynamics of the three isoforms obtained from NMR relaxation data reveal that ASCb tumbles as a rod, whereas the PYD and CARD of ASC and ASC3X tumble independently with marginally higher interdomain flexibility in ASC3X. Altogether, our data suggest that ASC's linker length is optimized for self-association by allowing enough flexibility to favor intermolecular homotypic interactions but simultaneously keeping both domains sufficiently close for essential participation in filament formation.
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Affiliation(s)
- Pedro Diaz-Parga
- Department of Bioengineering, School of Engineering, University of California Merced, California, USA; Quantitative Systems Biology PhD Program, University of California Merced, California, USA
| | - Andrea Gould
- Department of Bioengineering, School of Engineering, University of California Merced, California, USA
| | - Eva de Alba
- Department of Bioengineering, School of Engineering, University of California Merced, California, USA.
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23
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How location and cellular signaling combine to activate the NLRP3 inflammasome. Cell Mol Immunol 2022; 19:1201-1214. [PMID: 36127465 PMCID: PMC9622870 DOI: 10.1038/s41423-022-00922-w] [Citation(s) in RCA: 59] [Impact Index Per Article: 29.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2022] [Accepted: 08/15/2022] [Indexed: 01/27/2023] Open
Abstract
NOD-, LRR-, and pyrin domain-containing 3 (NLRP3) is a cytosolic innate immune sensor of cellular stress signals, triggered by infection and sterile inflammation. Upon detection of an activating stimulus, NLRP3 transitions from an inactive homo-oligomeric multimer into an active multimeric inflammasome, which promotes the helical oligomeric assembly of the adaptor molecule ASC. ASC oligomers provide a platform for caspase-1 activation, leading to the proteolytic cleavage and activation of proinflammatory cytokines in the IL-1 family and gasdermin D, which can induce a lytic form of cell death. Recent studies investigating both the cellular requirement for NLRP3 activation and the structure of NLRP3 have revealed the complex regulation of NLRP3 and the multiple steps involved in its activation. This review presents a perspective on the biochemical and cellular processes controlling the assembly of the NLRP3 inflammasome with particular emphasis on structural regulation and the role of organelles. We also highlight the latest research on metabolic control of this inflammatory pathway and discuss promising clinical targets for intervention.
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Guan Y, Gu Y, Li H, Liang B, Han C, Zhang Y, Liu Q, Wei W, Ma Y. NLRP3 inflammasome activation mechanism and its role in autoimmune liver disease. Acta Biochim Biophys Sin (Shanghai) 2022; 54:1577-1586. [PMID: 36148948 PMCID: PMC9828325 DOI: 10.3724/abbs.2022137] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
The NLRP3 inflammasome is a multiprotein binding compound comprising NLRP3, connector protein ASC, and effector protein pro-caspase-1. When the NLRP3 inflammasome senses a danger signal from the host or pathogen, activated caspase-1 cleaves the precursors of interleukin (IL)-1β and IL-18 into mature proinflammatory cytokines, simultaneously causing lysis via the pore-forming protein gasdermin D. This induction of cell inflammatory pyroptosis suggests that it is a key process in the innate immune response to pathogens or cellular stress. Recent studies have shown that NLRP3 inflammasome also plays an important role in regulating autoimmune liver diseases, including autoimmune hepatitis, primary biliary cholangitis, and primary sclerosclerotic cholangitis. In this review, we summarize the structure, activation and modulation of the NLRP3 inflammasome, highlight the progress in research on the role of NLRP3 inflammasome in the occurrence and development of autoimmune liver diseases, and discuss potential strategies for targeting the NLRP3 inflammasome in the treatment of autoimmune liver diseases.
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Affiliation(s)
- Yanling Guan
- Institute of Clinical PharmacologyAnhui Medical UniversityKey Laboratory of Anti-inflammatory and Immune MedicineMinistry of EducationAnhui Collaborative Innovation Center of Anti-inflammatory and Immune MedicineCenter of Rheumatoid Arthritis of Anhui Medical UniversityHefei230032China
| | - Yiyue Gu
- Department of Cardiologythe First People’s Hospital of XuzhouXuzhou221000China
| | - Hao Li
- Institute of Clinical PharmacologyAnhui Medical UniversityKey Laboratory of Anti-inflammatory and Immune MedicineMinistry of EducationAnhui Collaborative Innovation Center of Anti-inflammatory and Immune MedicineCenter of Rheumatoid Arthritis of Anhui Medical UniversityHefei230032China
| | - Bo Liang
- Institute of Dermatology and Department of Dermatologythe First Affiliated HospitalAnhui Medical UniversityHefei230032China
| | - Chenchen Han
- Institute of Clinical PharmacologyAnhui Medical UniversityKey Laboratory of Anti-inflammatory and Immune MedicineMinistry of EducationAnhui Collaborative Innovation Center of Anti-inflammatory and Immune MedicineCenter of Rheumatoid Arthritis of Anhui Medical UniversityHefei230032China
| | - Yu Zhang
- Institute of Clinical PharmacologyAnhui Medical UniversityKey Laboratory of Anti-inflammatory and Immune MedicineMinistry of EducationAnhui Collaborative Innovation Center of Anti-inflammatory and Immune MedicineCenter of Rheumatoid Arthritis of Anhui Medical UniversityHefei230032China
| | - Qian Liu
- Institute of Clinical PharmacologyAnhui Medical UniversityKey Laboratory of Anti-inflammatory and Immune MedicineMinistry of EducationAnhui Collaborative Innovation Center of Anti-inflammatory and Immune MedicineCenter of Rheumatoid Arthritis of Anhui Medical UniversityHefei230032China
| | - Wei Wei
- Institute of Clinical PharmacologyAnhui Medical UniversityKey Laboratory of Anti-inflammatory and Immune MedicineMinistry of EducationAnhui Collaborative Innovation Center of Anti-inflammatory and Immune MedicineCenter of Rheumatoid Arthritis of Anhui Medical UniversityHefei230032China,Correspondence address. Tel: +86-551-65161209; E-mail: (Y.M.) / E-mail: (W.W.) @ahmu.edu.cn
| | - Yang Ma
- Institute of Clinical PharmacologyAnhui Medical UniversityKey Laboratory of Anti-inflammatory and Immune MedicineMinistry of EducationAnhui Collaborative Innovation Center of Anti-inflammatory and Immune MedicineCenter of Rheumatoid Arthritis of Anhui Medical UniversityHefei230032China,Correspondence address. Tel: +86-551-65161209; E-mail: (Y.M.) / E-mail: (W.W.) @ahmu.edu.cn
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Mezzasoma L, Bellezza I, Romani R, Talesa VN. Extracellular Vesicles and the Inflammasome: An Intricate Network Sustaining Chemoresistance. Front Oncol 2022; 12:888135. [PMID: 35530309 PMCID: PMC9072732 DOI: 10.3389/fonc.2022.888135] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2022] [Accepted: 03/23/2022] [Indexed: 12/24/2022] Open
Abstract
Extracellular vesicles (EVs) are membrane enclosed spherical particles devoted to intercellular communication. Cancer-derived EVs (Ca-EVs) are deeply involved in tumor microenvironment remodeling, modifying the inflammatory phenotype of cancerous and non-cancerous residing cells. Inflammation plays a pivotal role in initiation, development, and progression of many types of malignancies. The key feature of cancer-related inflammation is the production of cytokines that incessantly modify of the surrounding environment. Interleukin-1β (IL-1β) is one of the most powerful cytokines, influencing all the initiation-to-progression stages of many types of cancers and represents an emerging critical contributor to chemoresistance. IL-1β production strictly depends on the activation of inflammasome, a cytoplasmic molecular platform sensing exogenous and endogenous danger signals. It has been recently shown that Ca-EVs can activate the inflammasome cascade and IL-1β production in tumor microenvironment-residing cells. Since inflammasome dysregulation has been established as crucial regulator in inflammation-associated tumorigenesis and chemoresistance, it is conceivable that the use of inflammasome-inhibiting drugs may be employed as adjuvant chemotherapy to counteract chemoresistance. This review focuses on the role of cancer-derived EVs in tuning tumor microenvironment unveiling the intricate network between inflammasome and chemoresistance.
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Hafiane A, Daskalopoulou SS. Targeting the Residual Cardiovascular Risk by Specific Anti-inflammatory Interventions as a Therapeutic Strategy in Atherosclerosis. Pharmacol Res 2022; 178:106157. [DOI: 10.1016/j.phrs.2022.106157] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/23/2021] [Revised: 02/23/2022] [Accepted: 03/03/2022] [Indexed: 12/11/2022]
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Sandin SI, de Alba E. Quantitative Studies on the Interaction between Saposin-like Proteins and Synthetic Lipid Membranes. Methods Protoc 2022; 5:mps5010019. [PMID: 35200535 PMCID: PMC8878781 DOI: 10.3390/mps5010019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2022] [Revised: 01/28/2022] [Accepted: 01/31/2022] [Indexed: 12/05/2022] Open
Abstract
Members of the saposin-fold protein family and related proteins sharing a similar fold (saposin-like proteins; SAPLIP) are peripheral-membrane binding proteins that perform essential cellular functions. Saposins and SAPLIPs are abundant in both plant and animal kingdoms, and peripherally bind to lipid membranes to play important roles in lipid transfer and hydrolysis, defense mechanisms, surfactant stabilization, and cell proliferation. However, quantitative studies on the interaction between proteins and membranes are challenging due to the different nature of the two components in relation to size, structure, chemical composition, and polarity. Using liposomes and the saposin-fold member saposin C (sapC) as model systems, we describe here a method to apply solution NMR and dynamic light scattering to study the interaction between SAPLIPs and synthetic membranes at the quantitative level. Specifically, we prove with NMR that sapC binds reversibly to the synthetic membrane in a pH-controlled manner and show the dynamic nature of its fusogenic properties with dynamic light scattering. The method can be used to infer the optimal pH for membrane binding and to determine an apparent dissociation constant (KDapp) for protein-liposome interaction. We propose that these experiments can be applied to other proteins sharing the saposin fold.
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Affiliation(s)
- Suzanne I. Sandin
- Department of Bioengineering, School of Engineering, University of California Merced, Merced, CA 95343, USA;
- Chemistry and Biochemistry Ph.D. Program, University of California Merced, Merced, CA 95343, USA
| | - Eva de Alba
- Department of Bioengineering, School of Engineering, University of California Merced, Merced, CA 95343, USA;
- Correspondence:
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Isazadeh M, Amandadi M, Haghdoust F, Lotfollazadeh S, Orzáez M, Hosseinkhani S. Split-luciferase complementary assay of NLRP3 PYD-PYD interaction indicates inflammasome formation during inflammation. Anal Biochem 2022; 638:114510. [PMID: 34863712 DOI: 10.1016/j.ab.2021.114510] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Revised: 10/29/2021] [Accepted: 11/30/2021] [Indexed: 01/18/2023]
Abstract
The NLRP3 inflammasome is a key macromolecular complex of the innate immune system that activates the inflammatory signalling cascade in response to a wide range of stimuli. Structural studies have shown that the intracellular cytosolic receptor NLRP3 oligomerizes upon stimulation and serves as a scaffold to form the ASC filaments necessary for procaspase-1 activation. Despite the abundant structural evidences on NLRP3 inflammasome, the interactions of the NLRP3 Pyrin domain and its functional relevance are poorly understood. In this study, the split luciferase complementation assay is used as an alternative approach to investigate NLRP3PYD-NLRP3PYD interactions during inflammasome formation. Since the homotypic NLRP3 interaction is mainly based on electrostatic interactions, a phosphomimetic residue (S5) at the interface of the NLRP3PYDs interactions has been mutated to show a disruptive effect on luciferase activity. According to the results presented, the designed biosensor was able to monitor the NLRP3PYD-NLRP3PYD interaction in vitro. The current reporter assay not only provides a specific NLRP3PYD-NLRP3PYD assay to study the PYD-PYD interaction in vitro, but also provides a suitable system for screening chemicals and drugs to identify activators and inhibitors of NLRP3.
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Affiliation(s)
- Mohsen Isazadeh
- Department of Biochemistry, Faculty of Biological Sciences, Tarbiat Modares University, Tehran, Iran
| | - Mojdeh Amandadi
- Department of Biochemistry, Faculty of Biological Sciences, Tarbiat Modares University, Tehran, Iran
| | - Farnaz Haghdoust
- Department of Biochemistry, Faculty of Biological Sciences, Tarbiat Modares University, Tehran, Iran
| | - Shima Lotfollazadeh
- Department of Nanobiotechnology, Faculty of Biological Sciences, Tarbiat Modares University, Tehran, Iran
| | - Mar Orzáez
- Laboratory of Peptide and Protein Chemistry, Centro de Investigación Príncipe Felipe, Valencia, Spain
| | - Saman Hosseinkhani
- Department of Biochemistry, Faculty of Biological Sciences, Tarbiat Modares University, Tehran, Iran.
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Shi J, Xia Y, Wang H, Yi Z, Zhang R, Zhang X. Piperlongumine Is an NLRP3 Inhibitor With Anti-inflammatory Activity. Front Pharmacol 2022; 12:818326. [PMID: 35095532 PMCID: PMC8790537 DOI: 10.3389/fphar.2021.818326] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2021] [Accepted: 12/15/2021] [Indexed: 01/04/2023] Open
Abstract
Piperlongumine (PL) is an alkaloid from Piper longum L. with anti-inflammatory and antitumor properties. Numerous studies have focused on its antitumor effect. However, the underlying mechanisms of its anti-inflammation remain elusive. In this study, we have found that PL is a natural inhibitor of Nod-like receptor family pyrin domain-containing protein-3 (NLRP3) inflammasome, an intracellular multi-protein complex that orchestrates host immune responses to infections or sterile inflammations. PL blocks NLRP3 activity by disrupting the assembly of NLRP3 inflammasome including the association between NLRP3 and NEK7 and subsequent NLRP3 oligomerization. Furthermore, PL suppressed lipopolysaccharide-induced endotoxemia and MSU-induced peritonitis in vivo, which are NLRP3-dependent inflammation. Thus, our study identified PL as an inhibitor of NLRP3 inflammasome and indicated the potential application of PL in NLRP3-relevant diseases.
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Affiliation(s)
- Jie Shi
- Department of Respiratory Medicine, Second Affiliated Hospital of Hainan Medical University, Haikou, China.,Department of General Surgery, The Third Xiangya Hospital of Central South University, Changsha, China
| | - Yang Xia
- Department of Respiratory Medicine, Second Affiliated Hospital of Hainan Medical University, Haikou, China
| | - Huihong Wang
- Department of Respiratory Medicine, Second Affiliated Hospital of Hainan Medical University, Haikou, China
| | - Zhongjie Yi
- Department of Plastic and Aesthetic (Burn) Surgery, The Second Xiangya Hospital of Central South University, Changsha, China
| | - Ruoruo Zhang
- Institute of Transplantation Medicine, Second Affiliated Hospital of Hainan Medical University, Haikou, China
| | - Xiufeng Zhang
- Department of Respiratory Medicine, Second Affiliated Hospital of Hainan Medical University, Haikou, China
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Moasses Ghafary S, Soriano-Teruel PM, Lotfollahzadeh S, Sancho M, Serrano-Candelas E, Karami F, Barigye SJ, Fernández-Pérez I, Gozalbes R, Nikkhah M, Orzáez M, Hosseinkhani S. Identification of NLRP3 PYD Homo-Oligomerization Inhibitors with Anti-Inflammatory Activity. Int J Mol Sci 2022; 23:ijms23031651. [PMID: 35163573 PMCID: PMC8835912 DOI: 10.3390/ijms23031651] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Revised: 01/25/2022] [Accepted: 01/27/2022] [Indexed: 12/22/2022] Open
Abstract
Inflammasomes are multiprotein complexes that represent critical elements of the inflammatory response. The dysregulation of the best-characterized complex, the NLRP3 inflammasome, has been linked to the pathogenesis of diseases such as multiple sclerosis, type 2 diabetes mellitus, Alzheimer's disease, and cancer. While there exist molecular inhibitors specific for the various components of inflammasome complexes, no currently reported inhibitors specifically target NLRP3PYD homo-oligomerization. In the present study, we describe the identification of QM380 and QM381 as NLRP3PYD homo-oligomerization inhibitors after screening small molecules from the MyriaScreen library using a split-luciferase complementation assay. Our results demonstrate that these NLRP3PYD inhibitors interfere with ASC speck formation, inhibit pro-inflammatory cytokine IL1-β release, and decrease pyroptotic cell death. We employed spectroscopic techniques and computational docking analyses with QM380 and QM381 and the PYD domain to confirm the experimental results and predict possible mechanisms underlying the inhibition of NLRP3PYD homo-interactions.
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Affiliation(s)
- Soroush Moasses Ghafary
- Department of Nanobiotechnology, Faculty of Biological Sciences, Tarbiat Modares University, Tehran 14117-13116, Iran; (S.M.G.); (S.L.); (F.K.); (M.N.)
| | - Paula M. Soriano-Teruel
- Centro de Investigación Príncipe Felipe, Targeted Therapies on Cancer and Inflammation Laboratory, 46012 Valencia, Spain; (P.M.S.-T.); (M.S.); (I.F.-P.)
- Centro de Investigación Príncipe Felipe, Polymer Therapeutics Laboratory, 46012 Valencia, Spain
| | - Shima Lotfollahzadeh
- Department of Nanobiotechnology, Faculty of Biological Sciences, Tarbiat Modares University, Tehran 14117-13116, Iran; (S.M.G.); (S.L.); (F.K.); (M.N.)
| | - Mónica Sancho
- Centro de Investigación Príncipe Felipe, Targeted Therapies on Cancer and Inflammation Laboratory, 46012 Valencia, Spain; (P.M.S.-T.); (M.S.); (I.F.-P.)
| | - Eva Serrano-Candelas
- ProtoQSAR SL, Centro Europeo de Empresas Innovadoras, Parque Tecnológico de Valencia, 46980 Paterna, Spain; (E.S.-C.); (S.J.B.); (R.G.)
| | - Fatemeh Karami
- Department of Nanobiotechnology, Faculty of Biological Sciences, Tarbiat Modares University, Tehran 14117-13116, Iran; (S.M.G.); (S.L.); (F.K.); (M.N.)
| | - Stephen J. Barigye
- ProtoQSAR SL, Centro Europeo de Empresas Innovadoras, Parque Tecnológico de Valencia, 46980 Paterna, Spain; (E.S.-C.); (S.J.B.); (R.G.)
- MolDrug AI Systems SL, 46018 Valencia, Spain
| | - Iván Fernández-Pérez
- Centro de Investigación Príncipe Felipe, Targeted Therapies on Cancer and Inflammation Laboratory, 46012 Valencia, Spain; (P.M.S.-T.); (M.S.); (I.F.-P.)
| | - Rafael Gozalbes
- ProtoQSAR SL, Centro Europeo de Empresas Innovadoras, Parque Tecnológico de Valencia, 46980 Paterna, Spain; (E.S.-C.); (S.J.B.); (R.G.)
- MolDrug AI Systems SL, 46018 Valencia, Spain
| | - Maryam Nikkhah
- Department of Nanobiotechnology, Faculty of Biological Sciences, Tarbiat Modares University, Tehran 14117-13116, Iran; (S.M.G.); (S.L.); (F.K.); (M.N.)
| | - Mar Orzáez
- Centro de Investigación Príncipe Felipe, Targeted Therapies on Cancer and Inflammation Laboratory, 46012 Valencia, Spain; (P.M.S.-T.); (M.S.); (I.F.-P.)
- Correspondence: (M.O.); (S.H.)
| | - Saman Hosseinkhani
- Department of Biochemistry, Faculty of Biological Sciences, Tarbiat Modares University, Tehran 14117-13116, Iran
- Correspondence: (M.O.); (S.H.)
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Shen S, Wang Z, Sun H, Ma L. Role of NLRP3 Inflammasome in Myocardial Ischemia-Reperfusion Injury and Ventricular Remodeling. Med Sci Monit 2022; 28:e934255. [PMID: 35042840 PMCID: PMC8790935 DOI: 10.12659/msm.934255] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Reperfusion therapy is the optimal therapy for acute myocardial infarction (AMI), but acute inflammatory injury and chronic heart failure (HF) after myocardial ischemia and reperfusion (MI/R) remain the leading cause of death after AMI. Pyroptosis, a newly discovered form of cell death, has been proven to play a significant role in the acute reperfusion process and the subsequent chronic process of ventricular remodeling. Current research shows that multiple stimuli activate the pyroptotic signaling pathway and contribute to cell death and nonbacterial inflammation after MI/R. These stimuli promote the assembly of the nucleotide-binding and oligomerization-like receptor pyrin domain-containing protein 3 (NLRP3) inflammasome by activating NLRP3. The mature NLRP3 inflammasome cleaves procaspase-1 to active caspase-1, which leads to mature processing of interleukin (IL)-18, IL-1β, and gasdermin D (GSDMD) protein. That eventually results in cell lysis and generation of nonbacterial inflammation. The present review summarizes the mechanism of NLRP3 inflammasome activation after MI/R and discusses the role that NLRP3-mediated pyroptosis plays in the pathophysiology of MI/R injury and ventricular remodeling. We also discuss potential mechanisms and targeted therapy for which there is evidence supporting treatment of ischemic heart disease.
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Affiliation(s)
- Shichun Shen
- Department of Cardiology, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui, China (mainland)
| | - Zhen Wang
- Department of Cardiology, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui, China (mainland)
| | - Haozhong Sun
- Department of Cardiology, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui, China (mainland)
| | - Likun Ma
- Department of Cardiology, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui, China (mainland)
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Diaz-Parga P, de Alba E. Inflammasome regulation by adaptor isoforms, ASC and ASCb, via differential self-assembly. J Biol Chem 2022; 298:101566. [PMID: 35007535 PMCID: PMC8891976 DOI: 10.1016/j.jbc.2022.101566] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2021] [Revised: 12/30/2021] [Accepted: 12/31/2021] [Indexed: 02/06/2023] Open
Abstract
ASC is an essential adaptor of the inflammasome, a micrometer-size multiprotein complex that processes proinflammatory cytokines. Inflammasome formation depends on ASC self-association into large assemblies via homotypic interactions of its two death domains, PYD and CARD. ASCb, an alternative splicing isoform, activates the inflammasome to a lesser extent compared with ASC. Thus, it has been postulated that adaptor isoforms differentially regulate inflammasome function. At the amino acid level, ASC and ASCb differ only in the length of the linker connecting the two death domains. To understand inflammasome regulation at the molecular level, we investigated the self-association properties of ASC and ASCb using real-time NMR, dynamic light scattering (DLS), size-exclusion chromatography, and transmission electron microscopy (TEM). The NMR data indicate that ASC self-association is faster than that of ASCb; a kinetic model for this oligomerization results in differing values for both the reaction order and the rate constants. Furthermore, DLS analysis indicates that ASC self-associates into more compact macrostructures compared with ASCb. Finally, TEM data show that ASCb has a reduced tendency to form densely packed filaments relative to ASC. Overall, these differences can only be explained by an effect of the linker length, as the NMR results show structural equivalence of the PYD and CARD in both proteins. The effect of linker length was corroborated by molecular docking with the procaspase-1 CARD domain. Altogether, our results indicate that ASC’s faster and less polydisperse polymerization is more efficient, plausibly explaining inflammasome activation differences by ASC isoforms at the molecular level.
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Affiliation(s)
- Pedro Diaz-Parga
- Department of Bioengineering, School of Engineering, University of California, Merced, Merced, California, USA; Quantitative Systems Biology Ph.D. Program, University of California, Merced, Merced, California, USA
| | - Eva de Alba
- Department of Bioengineering, School of Engineering, University of California, Merced, Merced, California, USA.
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Shevchuk DV, Abramova AA, Zakharova MN. The Role of Inflammasomes in the Pathogenesis of Neurodegenerative Diseases. NEUROCHEM J+ 2022; 16. [PMCID: PMC9575632 DOI: 10.1134/s1819712422030114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Abstract—Protein misfolding and accumulation of protein aggregates is a distinctive feature of most neurodegenerative diseases. They lead to disruption of cellular homeostasis, loss of synaptic connections, and therefore cellular apoptosis. It has been demonstrated that some innate immune responses play an important role in the emergence and progression of neurodegenerative diseases. Inflammasomes are components of innate immunity that play a major role in the maintenance of chronic inflammation. Inflammasomes function as intracellular sensors, detecting both exogenous and endogenous stimuli. They also take part in caspase-1 activation and the synthesis of pro-inflammatory cytokines. In the central nervous system (CNS), inflammasomes are predominantly expressed by microglia, the key cells of innate immunity responsible for activation and maintenance of inflammation. In addition to microglia, inflammasomes can be expressed and activated by astrocytes and neurons, as well as infiltrating myeloid cells. Understanding the mechanisms of activation and functioning of inflammasomes is crucial for the development of novel drugs targeted at modulation of the immune response associated with their excessive activation. This review provides up-to-date information on the inflammasome structure and mechanisms of action, the role of protein misfolding, aggregation and the influence of these factors on inflammasome activation, as well as potential therapeutic targets in neurodegenerative diseases.
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Andreeva L, David L, Rawson S, Shen C, Pasricha T, Pelegrin P, Wu H. NLRP3 cages revealed by full-length mouse NLRP3 structure control pathway activation. Cell 2021; 184:6299-6312.e22. [PMID: 34861190 PMCID: PMC8763037 DOI: 10.1016/j.cell.2021.11.011] [Citation(s) in RCA: 119] [Impact Index Per Article: 39.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2021] [Revised: 10/17/2021] [Accepted: 11/08/2021] [Indexed: 12/24/2022]
Abstract
The NACHT-, leucine-rich-repeat- (LRR), and pyrin domain-containing protein 3 (NLRP3) is emerging to be a critical intracellular inflammasome sensor of membrane integrity and a highly important clinical target against chronic inflammation. Here, we report that an endogenous, stimulus-responsive form of full-length mouse NLRP3 is a 12- to 16-mer double-ring cage held together by LRR-LRR interactions with the pyrin domains shielded within the assembly to avoid premature activation. Surprisingly, this NLRP3 form is predominantly membrane localized, which is consistent with previously noted localization of NLRP3 at various membrane organelles. Structure-guided mutagenesis reveals that trans-Golgi network dispersion into vesicles, an early event observed for many NLRP3-activating stimuli, requires the double-ring cages of NLRP3. Double-ring-defective NLRP3 mutants abolish inflammasome punctum formation, caspase-1 processing, and cell death. Thus, our data uncover a physiological NLRP3 oligomer on the membrane that is poised to sense diverse signals to induce inflammasome activation.
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Affiliation(s)
- Liudmila Andreeva
- Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, MA 02115, USA; Program in Cellular and Molecular Medicine, Boston Children's Hospital, Boston, MA 02115, USA
| | - Liron David
- Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, MA 02115, USA; Program in Cellular and Molecular Medicine, Boston Children's Hospital, Boston, MA 02115, USA
| | - Shaun Rawson
- Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, MA 02115, USA; Harvard Cryo-EM Center for Structural Biology, Boston, MA 02115, USA
| | - Chen Shen
- Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, MA 02115, USA; Program in Cellular and Molecular Medicine, Boston Children's Hospital, Boston, MA 02115, USA
| | - Teerithveen Pasricha
- Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, MA 02115, USA; Program in Cellular and Molecular Medicine, Boston Children's Hospital, Boston, MA 02115, USA; Northeastern University, Boston, MA 02115, USA
| | - Pablo Pelegrin
- Instituto Murciano de Investigación Biosanitaria (IMIB-Arrixaca), Universidad de Murcia, Murcia, Spain
| | - Hao Wu
- Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, MA 02115, USA; Program in Cellular and Molecular Medicine, Boston Children's Hospital, Boston, MA 02115, USA.
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35
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Inflammasome activation in neurodegenerative diseases. Essays Biochem 2021; 65:885-904. [PMID: 34846519 DOI: 10.1042/ebc20210021] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Revised: 10/08/2021] [Accepted: 10/20/2021] [Indexed: 12/14/2022]
Abstract
Approximately ten million people are diagnosed with dementia annually since they experience difficulties with memory and thinking skills. Since neurodegenerative diseases are diagnosed late, most of them are difficult to treat. This is due to the increased severity of the disease during the progression when neuroinflammation plays a critical role. The activation of immune cells, especially microglia, plays a crucial role in the development of neurodegenerative diseases. Molecular sensors within these microglia, such as the NLRP3 inflammasome, are activated by signals that represent the hallmarks of neurodegenerative diseases. Here, we first summarize the two activation steps of NLRP3 inflammasome activation. Furthermore, we discuss the key factors that contribute to NLRP3 inflammasome activation in the different neuroinflammatory diseases, like Alzheimer's disease (AD), Parkinson's disease (PD), and amyotrophic lateral sclerosis (ALS). The prominent NLRP3 inflammasome triggers include amyloid β and tau oligomers in AD, α-synuclein in PD, and superoxide dismutase (SOD1) and TAR DNA-binding protein 43 (TDP43) in ALS. NLRP3 inhibitor treatment has shown promising results in several preclinical mouse models of AD, PD, and ALS. Finally, we postulate that current understandings underpin the potential for NLRP3 inhibitors as a therapeutic target in neurodegenerative diseases.
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Burke RM, Dale BL, Dholakia S. The NLRP3 Inflammasome: Relevance in Solid Organ Transplantation. Int J Mol Sci 2021; 22:ijms221910721. [PMID: 34639062 PMCID: PMC8509131 DOI: 10.3390/ijms221910721] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Revised: 09/29/2021] [Accepted: 09/30/2021] [Indexed: 02/06/2023] Open
Abstract
The NOD, LRR, and pyrin domain-containing 3 (NLRP3) protein has been established as a central component of the inflammasome and regulates the inflammatory response to a myriad of environmental, microbial, and endogenous danger stimuli. Assembly of the NLRP3 inflammasome results in the cleavage and activation of caspase-1, in turn causing release of the pro-inflammatory interleukins 1-beta and 18. This activation response, while crucial to coordinated innate immune defense, can be aberrantly activated by the likes of cell-free DNA, and cause significant autoimmune pathology. Complications of autoimmunity induced by aberrant NLRP3 inflammasome activation have a great degree of mechanistic crossover with alloimmune injury in solid organ transplant, and stratagems to neutralize NLRP3 inflammasome activation may prove beneficial in solid organ transplant management. This article reviews NLRP3 inflammasome biology and the pathology associated with its hyperactivation, as well as the connections between NLRP3 inflammasome activation and allograft homeostasis.
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Affiliation(s)
- Ryan M. Burke
- CareDx, Inc., Brisbane, CA 94080, USA; (R.M.B.); (B.L.D.)
| | | | - Shamik Dholakia
- CareDx, Inc., Brisbane, CA 94080, USA; (R.M.B.); (B.L.D.)
- Oxford Transplant Center, Nuffield Department of Surgical Sciences, University of Oxford, Oxford OX3 7LD, UK
- Correspondence:
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37
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Bresch IP, Machtens DA, Reubold TF, Eschenburg S. Development of an in vitro assay for the detection of polymerization of the pyrin domain of ASC. Biotechniques 2021; 70:350-354. [PMID: 34114503 DOI: 10.2144/btn-2021-0011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Multicomponent protein complexes called inflammasomes play a major role in the innate immune system by activating proinflammatory cytokines and promoting a highly inflammatory form of programmed cell death, called pyroptosis. A hallmark of the function of the nucleotide-binding domain, leucine-rich repeat and NLRP3-mediated inflammasome assembly is the polymerization of ASC into large filaments. The ASC filaments recruit and activate procaspase-1 by induced proximity. We developed an in vitro assay for monitoring the polymerization of the pyrin domain of ASC by microscale thermophoresis. We have validated the assay by analyzing the effects of buffer conditions, mutations of ASC and the use of seeds on the polymerization behavior of ASC.
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Affiliation(s)
- Ian P Bresch
- Institute for Biophysical Chemistry, Hannover Medical School, Carl-Neuberg-Straße 1, 30625, Hannover, Germany.,Cluster of Excellence RESIST (EXC 2155), Hannover Medical School, Carl-Neuberg-Straße 1, 30625, Hannover, Germany
| | - Dominik A Machtens
- Institute for Biophysical Chemistry, Hannover Medical School, Carl-Neuberg-Straße 1, 30625, Hannover, Germany.,Cluster of Excellence RESIST (EXC 2155), Hannover Medical School, Carl-Neuberg-Straße 1, 30625, Hannover, Germany
| | - Thomas F Reubold
- Institute for Biophysical Chemistry, Hannover Medical School, Carl-Neuberg-Straße 1, 30625, Hannover, Germany
| | - Susanne Eschenburg
- Institute for Biophysical Chemistry, Hannover Medical School, Carl-Neuberg-Straße 1, 30625, Hannover, Germany.,Cluster of Excellence RESIST (EXC 2155), Hannover Medical School, Carl-Neuberg-Straße 1, 30625, Hannover, Germany
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38
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Xu Q, Xiao YL, Su XQ, Zhang XB, Deng ZJ. A new Co(II)-containing coordination polymer: treatment activity on sepsis mice by activating the NLRP3 inflammatory pathway. J COORD CHEM 2021. [DOI: 10.1080/00958972.2021.1918338] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Qian Xu
- Department of Emergency, The Third Hospital of Hebei Medical University, Shijiazhuang, China
| | - Yan-Lai Xiao
- Department of Obstetrics and Gynecology, The Third Hospital of Hebei Medical University, Shijiazhuang, China
| | - Xiao-Qing Su
- Department of Emergency, The Third Hospital of Hebei Medical University, Shijiazhuang, China
| | - Xiao-Bo Zhang
- Department of Emergency, The Third Hospital of Hebei Medical University, Shijiazhuang, China
| | - Zhuo-Jun Deng
- Department of Emergency, The Third Hospital of Hebei Medical University, Shijiazhuang, China
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39
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Kwon S, Chun HL, Ha HJ, Lee SY, Park HH. Heterogeneous multimeric structure of isocitrate lyase in complex with succinate and itaconate provides novel insights into its inhibitory mechanism. PLoS One 2021; 16:e0251067. [PMID: 33951112 PMCID: PMC8099091 DOI: 10.1371/journal.pone.0251067] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Accepted: 04/20/2021] [Indexed: 11/18/2022] Open
Abstract
During the glyoxylate cycle, isocitrate lyases (ICLs) catalyze the lysis of isocitrate to glyoxylate and succinate. Itaconate has been reported to inhibit an ICL from Mycobacterium tuberculosis (tbICL). To elucidate the molecular mechanism of ICL inhibition, we determined the crystal structure of tbICL in complex with itaconate. Unexpectedly, succinate and itaconate were found to bind to the respective active sites in the dimeric form of tbICL. Our structure revealed the active site architecture as an open form, although the substrate and inhibitor were bound to the active sites. Our findings provide novel insights into the conformation of tbICL upon its binding to a substrate or inhibitor, along with molecular details of the inhibitory mechanism of itaconate.
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Affiliation(s)
- Sunghark Kwon
- Department of Biotechnology, Konkuk University, Chungju, Chungbuk, Republic of Korea
| | - Hye Lin Chun
- College of Pharmacy, Chung-Ang University, Dongjak-gu, Seoul, Republic of Korea
| | - Hyun Ji Ha
- College of Pharmacy, Chung-Ang University, Dongjak-gu, Seoul, Republic of Korea
| | - So Yeon Lee
- College of Pharmacy, Chung-Ang University, Dongjak-gu, Seoul, Republic of Korea
| | - Hyun Ho Park
- College of Pharmacy, Chung-Ang University, Dongjak-gu, Seoul, Republic of Korea
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40
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Riaz M, Rehman AU, Shah SA, Rafiq H, Lu S, Qiu Y, Wadood A. Predicting Multi-Interfacial Binding Mechanisms of NLRP3 and ASC Pyrin Domains in Inflammasome Activation. ACS Chem Neurosci 2021; 12:603-612. [PMID: 33504150 DOI: 10.1021/acschemneuro.0c00519] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
NLRP3-PYD inflammasome activates an inflammatory pathway in response to a wide variety of cell damage or infections. Dysregulated NLRP3 inflammatory signaling has many chronic inflammatory and autoimmune disorders. NLRP3 and ASC have a PYD, a superfamily member of the Death Domain, which plays a key role in inflammatory assembly. The ASC interacts with NLRP3 through a homotypic PYD and recruits the procaspase-1 through a homotypic caspase recruitment domain interaction. Here, we used several computational approaches to reveal the interactions of the NLRP3 and ASC PYD domains that lead to the activation of the inflammasome complex. We have characterized ASC and NLRP3-PYD intermolecular interactions by protein-protein docking, and further molecular dynamics (MD) simulations were conducted to evaluate the stability of NLRP3/ASC-PYD complex. Subsequently, we have identified several residues that stabilize the NLRP3/ASC-PYD complex in different faces (i.e., Face-1 to Face-4). The research framework offers new insights into the molecular mechanisms of inflammasome and apoptosis signaling as well as the ease of the drug discovery process.
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Affiliation(s)
- Muhammad Riaz
- Department of Biochemistry, Abdul Wali Khan University Mardan, Mardan 23200, Pakistan
| | - Ashfaq Ur Rehman
- Department of Biochemistry, Abdul Wali Khan University Mardan, Mardan 23200, Pakistan
- Department of Pathophysiology, Key Laboratory of Cell Differentiation and Apoptosis of Chinese Ministry of Education, Shanghai Jiao Tong University, School of Medicine, Shanghai 200025, China
| | - Shahid Ali Shah
- Department of Chemistry, Sarhad University of Science and Information Technology, Peshawar 25000, Pakistan
| | - Humaira Rafiq
- Department of Biochemistry, Abdul Wali Khan University Mardan, Mardan 23200, Pakistan
| | - Shaoyong Lu
- Department of Pathophysiology, Key Laboratory of Cell Differentiation and Apoptosis of Chinese Ministry of Education, Shanghai Jiao Tong University, School of Medicine, Shanghai 200025, China
| | - Yingying Qiu
- Department of Neurology, Tiantai Hospital of Traditional Chinese Medicine, Taizhou, Zhejiang 317200, China
| | - Abdul Wadood
- Department of Biochemistry, Abdul Wali Khan University Mardan, Mardan 23200, Pakistan
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Structure, Activation and Regulation of NLRP3 and AIM2 Inflammasomes. Int J Mol Sci 2021; 22:ijms22020872. [PMID: 33467177 PMCID: PMC7830601 DOI: 10.3390/ijms22020872] [Citation(s) in RCA: 74] [Impact Index Per Article: 24.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Revised: 12/23/2020] [Accepted: 01/11/2021] [Indexed: 12/12/2022] Open
Abstract
The inflammasome is a three-component (sensor, adaptor, and effector) filamentous signaling platform that shields from multiple pathogenic infections by stimulating the proteolytical maturation of proinflammatory cytokines and pyroptotic cell death. The signaling process initiates with the detection of endogenous and/or external danger signals by specific sensors, followed by the nucleation and polymerization from sensor to downstream adaptor and then to the effector, caspase-1. Aberrant activation of inflammasomes promotes autoinflammatory diseases, cancer, neurodegeneration, and cardiometabolic disorders. Therefore, an equitable level of regulation is required to maintain the equilibrium between inflammasome activation and inhibition. Recent advancement in the structural and mechanistic understanding of inflammasome assembly potentiates the emergence of novel therapeutics against inflammasome-regulated diseases. In this review, we have comprehensively discussed the recent and updated insights into the structure of inflammasome components, their activation, interaction, mechanism of regulation, and finally, the formation of densely packed filamentous inflammasome complex that exists as micron-sized punctum in the cells and mediates the immune responses.
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Xu Z, Zhou Y, Liu M, Ma H, Sun L, Zahid A, Chen Y, Zhou R, Cao M, Wu D, Zhao W, Li B, Jin T. Homotypic CARD-CARD interaction is critical for the activation of NLRP1 inflammasome. Cell Death Dis 2021; 12:57. [PMID: 33431827 PMCID: PMC7801473 DOI: 10.1038/s41419-020-03342-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2020] [Revised: 12/08/2020] [Accepted: 12/11/2020] [Indexed: 01/07/2023]
Abstract
Cytosolic inflammasomes are supramolecular complexes that are formed in response to intracellular pathogens and danger signals. However, as to date, the detailed description of a homotypic caspase recruitment domain (CARD) interaction between NLRP1 and ASC has not been presented. We found the CARD-CARD interaction between purified NLRP1CARD and ASCCARD experimentally and the filamentous supramolecular complex formation in an in vitro proteins solution. Moreover, we determined a high-resolution crystal structure of the death domain fold of the human ASCCARD. Mutational and structural analysis revealed three conserved interfaces of the death domain superfamily (Type I, II, and III), which mediate the assembly of the NLRP1CARD/ASCCARD complex. In addition, we validated the role of the three major interfaces of CARDs in assembly and activation of NLRP1 inflammasome in vitro. Our findings suggest a Mosaic model of homotypic CARD interactions for the activation of NLRP1 inflammasome. The Mosaic model provides insights into the mechanisms of inflammasome assembly and signal transduction amplification.
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Affiliation(s)
- Zhihao Xu
- grid.59053.3a0000000121679639Department of Obstetrics and Gynecology, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui 230001 China ,grid.59053.3a0000000121679639Hefei National Laboratory for Physical Sciences at Microscale, The CAS Key Laboratory of Innate Immunity and Chronic Disease, School of Basic Medicine Sciences, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui 230027 China
| | - Ying Zhou
- grid.59053.3a0000000121679639Department of Obstetrics and Gynecology, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui 230001 China
| | - Muziying Liu
- grid.59053.3a0000000121679639Hefei National Laboratory for Physical Sciences at Microscale, The CAS Key Laboratory of Innate Immunity and Chronic Disease, School of Basic Medicine Sciences, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui 230027 China
| | - Huan Ma
- grid.59053.3a0000000121679639Hefei National Laboratory for Physical Sciences at Microscale, The CAS Key Laboratory of Innate Immunity and Chronic Disease, School of Basic Medicine Sciences, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui 230027 China
| | - Liangqi Sun
- grid.59053.3a0000000121679639Hefei National Laboratory for Physical Sciences at Microscale, The CAS Key Laboratory of Innate Immunity and Chronic Disease, School of Basic Medicine Sciences, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui 230027 China
| | - Ayesha Zahid
- grid.59053.3a0000000121679639Hefei National Laboratory for Physical Sciences at Microscale, The CAS Key Laboratory of Innate Immunity and Chronic Disease, School of Basic Medicine Sciences, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui 230027 China
| | - Yulei Chen
- grid.411902.f0000 0001 0643 6866College of Food and Biological Engineering, Jimei University, Xiamen, Fujian 361021 China
| | - Rongbin Zhou
- grid.59053.3a0000000121679639Hefei National Laboratory for Physical Sciences at Microscale, The CAS Key Laboratory of Innate Immunity and Chronic Disease, School of Basic Medicine Sciences, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui 230027 China ,grid.9227.e0000000119573309CAS Center for Excellence in Molecular Cell Science, Chinese Academy of Science, Shanghai, 200031 China
| | - Minjie Cao
- grid.411902.f0000 0001 0643 6866College of Food and Biological Engineering, Jimei University, Xiamen, Fujian 361021 China
| | - Dabao Wu
- grid.59053.3a0000000121679639Department of Obstetrics and Gynecology, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui 230001 China
| | - Weidong Zhao
- grid.59053.3a0000000121679639Department of Obstetrics and Gynecology, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui 230001 China
| | - Bofeng Li
- grid.59053.3a0000000121679639Department of Medical Oncology, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui China 230001
| | - Tengchuan Jin
- grid.59053.3a0000000121679639Department of Obstetrics and Gynecology, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui 230001 China ,grid.59053.3a0000000121679639Hefei National Laboratory for Physical Sciences at Microscale, The CAS Key Laboratory of Innate Immunity and Chronic Disease, School of Basic Medicine Sciences, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui 230027 China ,grid.9227.e0000000119573309CAS Center for Excellence in Molecular Cell Science, Chinese Academy of Science, Shanghai, 200031 China
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Moecking J, Laohamonthonkul P, Chalker K, White MJ, Harapas CR, Yu CH, Davidson S, Hrovat-Schaale K, Hu D, Eng C, Huntsman S, Calleja DJ, Horvat JC, Hansbro PM, O'Donoghue RJJ, Ting JP, Burchard EG, Geyer M, Gerlic M, Masters SL. NLRP1 variant M1184V decreases inflammasome activation in the context of DPP9 inhibition and asthma severity. J Allergy Clin Immunol 2020; 147:2134-2145.e20. [PMID: 33378691 PMCID: PMC8168955 DOI: 10.1016/j.jaci.2020.12.636] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2020] [Revised: 12/13/2020] [Accepted: 12/17/2020] [Indexed: 02/01/2023]
Abstract
Background NLRP1 is an innate immune sensor that can form cytoplasmic inflammasome complexes. Polymorphisms in NLRP1 are linked to asthma; however, there is currently no functional or mechanistic explanation for this. Objective We sought to clarify the role of NLRP1 in asthma pathogenesis. Methods Results from the GALA II cohort study were used to identify a link between NLRP1 and asthma in Mexican Americans. In vitro and in vivo models for NLRP1 activation were applied to investigate the role of this inflammasome in asthma at the molecular level. Results We document the association of an NLRP1 haplotype with asthma for which the single nucleotide polymorphism rs11651270 (M1184V) individually is the most significant. Surprisingly, M1184V increases NLRP1 activation in the context of N-terminal destabilization, but decreases NLRP1 activation on dipeptidyl peptidase 9 inhibition. In vitro studies demonstrate that M1184V increases binding to dipeptidyl peptidase 9, which can account for its inhibitory role in this context. In addition, in vivo data from a mouse model of airway inflammation reveal a protective role for NLRP1 inflammasome activation reducing eosinophilia in this setting. Conclusions Linking our in vitro and in vivo results, we found that the NLRP1 variant M1184V reduces inflammasome activation in the context of dipeptidyl peptidase 9 inhibition and could thereby increase asthma severity. Our studies may have implications for the treatment of asthma in patients carrying this variant of NLRP1.
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Affiliation(s)
- Jonas Moecking
- Inflammation Division, The Walter and Eliza Hall Institute of Medical Research, Parkville, Australia; Department of Medical Biology, University of Melbourne, Parkville, Australia; the Institute of Structural Biology, University of Bonn, Venusberg-Campus 1, Bonn, Germany
| | - Pawat Laohamonthonkul
- Inflammation Division, The Walter and Eliza Hall Institute of Medical Research, Parkville, Australia; Department of Medical Biology, University of Melbourne, Parkville, Australia
| | - Katelyn Chalker
- Inflammation Division, The Walter and Eliza Hall Institute of Medical Research, Parkville, Australia; Department of Medical Biology, University of Melbourne, Parkville, Australia
| | - Marquitta J White
- Department of Medicine, University of California, San Francisco, Calif
| | - Cassandra R Harapas
- Inflammation Division, The Walter and Eliza Hall Institute of Medical Research, Parkville, Australia; Department of Medical Biology, University of Melbourne, Parkville, Australia
| | - Chien-Hsiung Yu
- Inflammation Division, The Walter and Eliza Hall Institute of Medical Research, Parkville, Australia; Department of Medical Biology, University of Melbourne, Parkville, Australia
| | - Sophia Davidson
- Inflammation Division, The Walter and Eliza Hall Institute of Medical Research, Parkville, Australia; Department of Medical Biology, University of Melbourne, Parkville, Australia
| | - Katja Hrovat-Schaale
- Inflammation Division, The Walter and Eliza Hall Institute of Medical Research, Parkville, Australia; Department of Medical Biology, University of Melbourne, Parkville, Australia
| | - Donglei Hu
- Department of Medicine, University of California, San Francisco, Calif
| | - Celeste Eng
- Department of Medicine, University of California, San Francisco, Calif
| | - Scott Huntsman
- Department of Medicine, University of California, San Francisco, Calif
| | - Dale J Calleja
- Inflammation Division, The Walter and Eliza Hall Institute of Medical Research, Parkville, Australia; Department of Medical Biology, University of Melbourne, Parkville, Australia
| | - Jay C Horvat
- the Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute, New Lambton, Australia; University of Newcastle, Callaghan, Australia
| | - Phil M Hansbro
- the Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute, New Lambton, Australia; University of Newcastle, Callaghan, Australia; Centre for Inflammation, Centenary Institute, Sydney, Australia; Faculty of Science, University of Technology Sydney, Ultimo, Australia
| | - Robert J J O'Donoghue
- Department of Pharmacology and Therapeutics, University of Melbourne, Melbourne, Australia
| | - Jenny P Ting
- Department of Microbiology and Immunology, University of North Carolina, Chapel Hill, NC
| | - Esteban G Burchard
- Department of Medicine, University of California, San Francisco, Calif; Department of Bioengineering & Therapeutic Sciences, University of California, San Francisco, San Francisco, Calif
| | - Matthias Geyer
- the Institute of Structural Biology, University of Bonn, Venusberg-Campus 1, Bonn, Germany
| | - Motti Gerlic
- Department of Clinical Microbiology and Immunology, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Seth L Masters
- Inflammation Division, The Walter and Eliza Hall Institute of Medical Research, Parkville, Australia; Department of Medical Biology, University of Melbourne, Parkville, Australia.
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Dai Z, Chen XY, An LY, Li CC, Zhao N, Yang F, You ST, Hou CZ, Li K, Jiang C, You QD, Di B, Xu LL. Development of Novel Tetrahydroquinoline Inhibitors of NLRP3 Inflammasome for Potential Treatment of DSS-Induced Mouse Colitis. J Med Chem 2020; 64:871-889. [PMID: 33332136 DOI: 10.1021/acs.jmedchem.0c01924] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The NLRP3 inflammasome is a critical component of innate immunity, which defends internal and external threats. However, inappropriate activation of the NLRP3 inflammasome induces various human diseases. In this study, we discovered and synthesized a series of tetrahydroquinoline inhibitors of NLRP3 inflammasome. Among these analogues, compound 6 exhibited optimal NLRP3 inhibitory activity. In vitro studies indicated that compound 6 directly bound to the NACHT domain of NLRP3 but not to protein pyrin domain (PYD) or LRR domain, inhibited NLRP3 ATPase activity, and blocked ASC oligomerization, thereby inhibiting NLRP3 inflammasome assembly and activation. Compound 6 specifically inhibited the NLRP3 inflammasome activation, but had no effect on the activation of NLRC4 or AIM2 inflammasomes. Furthermore, in the dextran sulfate sodium (DSS)-induced colitis mouse model, compound 6 exhibited significant anti-inflammatory activity through inhibiting NLRP3 inflammasome in vivo. Therefore, our study provides a potent NLRP3 inflammasome inhibitor, which deserves further structural optimization as a novel therapeutic candidate for NLRP3-driven diseases.
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Affiliation(s)
- Zhen Dai
- Jiangsu Key Laboratory of Drug Design and Optimization, China Pharmaceutical University, Nanjing 210009, China.,Key Laboratory of Drug Quality Control and Pharmacovigilance, Ministry of Education, China Pharmaceutical University, Nanjing 210009, China
| | - Xiao-Yi Chen
- Jiangsu Key Laboratory of Drug Design and Optimization, China Pharmaceutical University, Nanjing 210009, China.,Key Laboratory of Drug Quality Control and Pharmacovigilance, Ministry of Education, China Pharmaceutical University, Nanjing 210009, China
| | - Lu-Yan An
- Jiangsu Key Laboratory of Drug Design and Optimization, China Pharmaceutical University, Nanjing 210009, China.,Key Laboratory of Drug Quality Control and Pharmacovigilance, Ministry of Education, China Pharmaceutical University, Nanjing 210009, China
| | - Cui-Cui Li
- Jiangsu Key Laboratory of Drug Design and Optimization, China Pharmaceutical University, Nanjing 210009, China.,Key Laboratory of Drug Quality Control and Pharmacovigilance, Ministry of Education, China Pharmaceutical University, Nanjing 210009, China
| | - Ni Zhao
- Jiangsu Key Laboratory of Drug Design and Optimization, China Pharmaceutical University, Nanjing 210009, China.,Key Laboratory of Drug Quality Control and Pharmacovigilance, Ministry of Education, China Pharmaceutical University, Nanjing 210009, China
| | - Fan Yang
- Jiangsu Key Laboratory of Drug Design and Optimization, China Pharmaceutical University, Nanjing 210009, China.,Key Laboratory of Drug Quality Control and Pharmacovigilance, Ministry of Education, China Pharmaceutical University, Nanjing 210009, China
| | - Song-Tao You
- Jiangsu Key Laboratory of Drug Design and Optimization, China Pharmaceutical University, Nanjing 210009, China.,Key Laboratory of Drug Quality Control and Pharmacovigilance, Ministry of Education, China Pharmaceutical University, Nanjing 210009, China
| | - Chen-Zhi Hou
- Jiangsu Key Laboratory of Drug Design and Optimization, China Pharmaceutical University, Nanjing 210009, China.,Key Laboratory of Drug Quality Control and Pharmacovigilance, Ministry of Education, China Pharmaceutical University, Nanjing 210009, China
| | - Kan Li
- Jiangsu Key Laboratory of Drug Design and Optimization, China Pharmaceutical University, Nanjing 210009, China.,Key Laboratory of Drug Quality Control and Pharmacovigilance, Ministry of Education, China Pharmaceutical University, Nanjing 210009, China
| | - Cheng Jiang
- Jiangsu Key Laboratory of Drug Design and Optimization, China Pharmaceutical University, Nanjing 210009, China.,Key Laboratory of Drug Quality Control and Pharmacovigilance, Ministry of Education, China Pharmaceutical University, Nanjing 210009, China
| | - Qi-Dong You
- Jiangsu Key Laboratory of Drug Design and Optimization, China Pharmaceutical University, Nanjing 210009, China
| | - Bin Di
- Jiangsu Key Laboratory of Drug Design and Optimization, China Pharmaceutical University, Nanjing 210009, China.,Key Laboratory of Drug Quality Control and Pharmacovigilance, Ministry of Education, China Pharmaceutical University, Nanjing 210009, China
| | - Li-Li Xu
- Jiangsu Key Laboratory of Drug Design and Optimization, China Pharmaceutical University, Nanjing 210009, China.,Key Laboratory of Drug Quality Control and Pharmacovigilance, Ministry of Education, China Pharmaceutical University, Nanjing 210009, China
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45
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Samson JM, Ravindran Menon D, Vaddi PK, Kalani Williams N, Domenico J, Zhai Z, Backos DS, Fujita M. Computational Modeling of NLRP3 Identifies Enhanced ATP Binding and Multimerization in Cryopyrin-Associated Periodic Syndromes. Front Immunol 2020; 11:584364. [PMID: 33329557 PMCID: PMC7711157 DOI: 10.3389/fimmu.2020.584364] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Accepted: 10/20/2020] [Indexed: 11/13/2022] Open
Abstract
Cyropyrin-associated periodic syndromes (CAPS) are clinically distinct syndromes that encompass a phenotypic spectrum yet are caused by alterations in the same gene, NLRP3. Many CAPS cases and other NLRP3-autoinflammatory diseases (NLRP3-AIDs) are directly attributed to protein-coding alterations in NLRP3 and the subsequent dysregulation of the NLRP3 inflammasome leading to IL-1β-mediated inflammatory states. Here, we used bioinformatics tools, computational modeling, and computational assessments to explore the proteomic consequences of NLRP3 mutations, which potentially drive NLRP3 inflammasome dysregulation. We analyzed 177 mutations derived from familial cold autoinflammatory syndrome (FCAS), Muckle-Wells Syndrome (MWS), and the non-hereditary chronic infantile neurologic cutaneous and articular syndrome, also known as neonatal-onset multisystem inflammatory disease (CINCA/NOMID), as well as other NLRP3-AIDs. We found an inverse relationship between clinical severity and the severity of predicted structure changes resulting from mutations in NLRP3. Bioinformatics tools and computational modeling revealed that NLRP3 mutations that are predicted to be structurally severely-disruptive localize around the ATP binding pocket and that specific proteo-structural changes to the ATP binding pocket lead to enhanced ATP binding affinity by altering hydrogen-bond and charge interactions. Furthermore, we demonstrated that NLRP3 mutations that are predicted to be structurally mildly- or moderately-disruptive affect protein-protein interactions, such as NLRP3-ASC binding and NLRP3-NLRP3 multimerization, enhancing inflammasome formation and complex stability. Taken together, we provide evidence that proteo-structural mechanisms can explain multiple mechanisms of inflammasome activation in NLRP3-AID.
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Affiliation(s)
- Jenny Mae Samson
- Department of Dermatology, University of Colorado Anschutz Medical Campus, Aurora, CO, United States
| | - Dinoop Ravindran Menon
- Department of Dermatology, University of Colorado Anschutz Medical Campus, Aurora, CO, United States
| | - Prasanna K Vaddi
- Department of Dermatology, University of Colorado Anschutz Medical Campus, Aurora, CO, United States
| | - Nazanin Kalani Williams
- Department of Dermatology, University of Colorado Anschutz Medical Campus, Aurora, CO, United States
| | - Joanne Domenico
- Department of Dermatology, University of Colorado Anschutz Medical Campus, Aurora, CO, United States
| | - Zili Zhai
- Department of Dermatology, University of Colorado Anschutz Medical Campus, Aurora, CO, United States
| | - Donald S Backos
- Department of Pharmaceutical Sciences, Skaggs School of Pharmacy, University of Colorado Anschutz Medical Campus, Aurora, CO, United States
| | - Mayumi Fujita
- Department of Dermatology, University of Colorado Anschutz Medical Campus, Aurora, CO, United States.,Department of Immunology, University of Colorado Anschutz Medical Campus, Aurora, CO, United States.,Denver VA Medical Center, Aurora, CO, United States
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Lee SY, Kim GE, Kim YG, Park HH. A 1.3 Å high-resolution crystal structure of an anti-CRISPR protein, AcrI E2. Biochem Biophys Res Commun 2020; 533:751-757. [PMID: 32988588 DOI: 10.1016/j.bbrc.2020.09.067] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Accepted: 09/17/2020] [Indexed: 11/27/2022]
Abstract
As a result of bacterial infection with viruses, bacteria have developed CRISPR-Cas as an adaptive immune system, which allows them to destroy the viral genetic material introduced via infection. However, viruses have also evolved to develop multiple anti-CRISPR proteins, which are capable of inactivating the CRISPR-Cas adaptive immune system to combat bacteria. In this study, we aimed to elucidate the molecular mechanisms associated with anti-CRISPR proteins by determining a high-resolution crystal structure (1.3 Å) of Type I-E anti-CRISPR protein called AcrIE2. Our structural analysis revealed that AcrIE2 was composed of unique folds comprising five antiparallel β-sheets (β1∼β5) surrounding one α-helix (α1) in the order, β2β1α1β5β4β3. Structural comparison of AcrIE2 with a structural homolog called AcrIF9 showed that AcrIE2 contained a long and flexible β4-β5 connecting loop and a distinct surface feature. These results indicated that the inhibitory mechanism of AcrIE2 might be different from that of AcrIF9. This unique structure of AcrIE2 indicates its special mode of CRISPR-Cas inhibitory activity. Therefore, this study helps us understand the diversity in the inhibitory mechanisms of Acr family.
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Affiliation(s)
- So Yeon Lee
- Department of Global Innovative Drugs, Graduate School of Chung-Ang University, Seoul, 06974, Republic of Korea; College of Pharmacy, Chung-Ang University, Seoul, 06974, Republic of Korea
| | - Gi Eob Kim
- Department of Global Innovative Drugs, Graduate School of Chung-Ang University, Seoul, 06974, Republic of Korea; College of Pharmacy, Chung-Ang University, Seoul, 06974, Republic of Korea
| | - Yeon-Gil Kim
- Pohang Accelerator Laboratory, Pohang University of Science and Technology, Pohang, 790-784, Republic of Korea
| | - Hyun Ho Park
- Department of Global Innovative Drugs, Graduate School of Chung-Ang University, Seoul, 06974, Republic of Korea; College of Pharmacy, Chung-Ang University, Seoul, 06974, Republic of Korea.
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de Alba E. The mysterious role of the NLRP9 pyrin domain in inflammasome assembly. FEBS Lett 2020; 594:2380-2382. [PMID: 32735703 DOI: 10.1002/1873-3468.13889] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Eva de Alba
- Department of Bioengineering. School of Engineering, University of California, Merced, CA, USA
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Liang Q, Cai W, Zhao Y, Xu H, Tang H, Chen D, Qian F, Sun L. Lycorine ameliorates bleomycin-induced pulmonary fibrosis via inhibiting NLRP3 inflammasome activation and pyroptosis. Pharmacol Res 2020; 158:104884. [DOI: 10.1016/j.phrs.2020.104884] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/25/2019] [Revised: 04/10/2020] [Accepted: 05/01/2020] [Indexed: 01/17/2023]
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49
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Inflammasome inhibition under physiological and pharmacological conditions. Genes Immun 2020; 21:211-223. [PMID: 32681062 DOI: 10.1038/s41435-020-0104-x] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Revised: 07/01/2020] [Accepted: 07/08/2020] [Indexed: 01/08/2023]
Abstract
Inflammasomes are key regulators of the host response against microbial pathogens, in addition to limiting aberrant responses to sterile insults, as mediated by environmental agents such as toxins or nanoparticles, and also by endogenous danger signals such as monosodium urate, ATP and amyloid-β. To date at least six different inflammasome signalling platforms have been reported (Bauernfeind & Hornung, EMBO Mol Med. 2013;5:814-26; Broz & Dixit, Nat Rev Immunol. 2016;16:407). This review focuses on the complex molecular machinery involved in activation and regulation of the best characterised inflammasome, NLRP3 (NOD-, LRR- and pyrin domain-containing protein 3), and the development of molecular agents to modulate NLRP3 inflammasome function. Activation of the NLRP3 inflammasome induces inflammation via secretion of interleukin-1β (IL-1β) and interleukin-18 (IL-18) proinflammatory cytokines, with orchestration of pyroptotic cell death, to eliminate invading microbial pathogens. This field has gradually moved from an emphasis on monogenic autoinflammatory conditions, such as cryopyrin-associated periodic syndromes (CAPS), to the broad spectrum of innate immune-mediated disease. NLRP3 inflammasome activation is also linked to a range of common disorders in humans including type 2 diabetes (Krainer et al., J Autoimmun. 2020:102421), cystic fibrosis (Scambler et al., eLife. 2019;8), myocardial infarction, Parkinson's disease, Alzheimer's disease (Savic et al., Nat Rev Rheumatol. 2020:1-16) and cancers such as mesotheliomas and gliomas (Moossavi et al., Mol Cancer. 2018;17:158). We describe how laboratory-based assessment of NLRP3 inflammasome activation is emerging as an integral part of the clinical evaluation and treatment of a range of undifferentiated systemic autoinflammatory disorders (uSAID) (Harrison et al., JCI Insight. 2016;1), where a DNA-based diagnosis has not been possible. In addition, this review summarises the current literature on physiological inhibitors and features various pharmacological approaches that are currently being developed, with potential for clinical translation in autoinflammatory and immune-mediated conditions. We discuss the possibilities of rational drug design, based on detailed structural analyses, and some of the challenges in transferring exciting preliminary results from trials of small-molecule inhibitors of the NLRP3 inflammasome, in animal models of disease, to the clinical situation in human pathology.
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Sušjan P, Lainšček D, Strmšek Ž, Hodnik V, Anderluh G, Hafner-Bratkovič I. Selective inhibition of NLRP3 inflammasome by designed peptide originating from ASC. FASEB J 2020; 34:11068-11086. [PMID: 32648626 DOI: 10.1096/fj.201902938rr] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2019] [Revised: 06/08/2020] [Accepted: 06/12/2020] [Indexed: 12/13/2022]
Abstract
NACHT, LRR, and PYD domains-containing protein 3 (NLRP3) inflammasome is a multiprotein complex which forms within cells in response to various microbial and self-derived triggers. Mutations in the gene encoding NLRP3 cause rare cryopyrin-associated periodic syndromes (CAPS) and growing evidence links NLRP3 inflammasome to common diseases such as Alzheimer´s disease. In order to modulate different stages of NLRP3 inflammasome assembly nine peptides whose sequences correspond to segments of inflammasome components NLRP3 and apoptosis-associated speck-like protein containing a CARD (ASC) were selected. Five peptides inhibited IL-1β release, caspase-1 activation and ASC oligomerization in response to soluble and particulate NLRP3 triggers. Modulatory peptides also attenuated IL-1β maturation induced by constitutive CAPS-associated NLRP3 mutants. Peptide corresponding to H2-H3 segment of ASC pyrin domain selectively inhibited NLRP3 inflammasome by binding to NLRP3 pyrin domain in the micromolar range. The peptide had no effect on AIM2 and NLRC4 inflammasomes as well as NF-κB pathway. The peptide effectively dampened neutrophil infiltration in the silica-induced peritonitis and when equipped with Antennapedia or Angiopep-2 motifs crossed the blood-brain barrier in a mouse model. Our study demonstrates that peptides represent an important tool for targeting multiprotein inflammatory complexes and can serve as the basis for the development of novel anti-inflammatory strategies for neurodegeneration.
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Affiliation(s)
- Petra Sušjan
- Department of Synthetic Biology and Immunology, National Institute of Chemistry, Ljubljana, Slovenia.,Graduate School of Biomedicine, University of Ljubljana, Ljubljana, Slovenia
| | - Duško Lainšček
- Department of Synthetic Biology and Immunology, National Institute of Chemistry, Ljubljana, Slovenia
| | - Žiga Strmšek
- Department of Synthetic Biology and Immunology, National Institute of Chemistry, Ljubljana, Slovenia.,Graduate School of Biomedicine, University of Ljubljana, Ljubljana, Slovenia
| | - Vesna Hodnik
- Department of Molecular Biology and Nanobiotechnology, National Institute of Chemistry, Ljubljana, Slovenia.,Department of Biology, Biotechnical Faculty, University of Ljubljana, Ljubljana, Slovenia
| | - Gregor Anderluh
- Department of Molecular Biology and Nanobiotechnology, National Institute of Chemistry, Ljubljana, Slovenia
| | - Iva Hafner-Bratkovič
- Department of Synthetic Biology and Immunology, National Institute of Chemistry, Ljubljana, Slovenia.,EN-FIST Centre of Excellence, Ljubljana, Slovenia
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