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Wu E, Wu C, Jia K, Zhou S, Sun L. HSPA8 inhibitors augment cancer chemotherapeutic effectiveness via potentiating necroptosis. Mol Biol Cell 2024; 35:ar108. [PMID: 38959101 PMCID: PMC11321035 DOI: 10.1091/mbc.e24-04-0194] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2024] [Revised: 06/17/2024] [Accepted: 06/24/2024] [Indexed: 07/05/2024] Open
Abstract
Our recent work has uncovered a novel function of HSPA8 as an amyloidase, capable of dismantling the RHIM-containing protein fibrils to suppress necroptosis. However, the impact of HSPA8 inhibitors on cancer regression via necroptosis remains unexplored. In this study, we conducted a comprehensive investigation to assess the potential of HSPA8 inhibitors in enhancing necroptosis both in vitro and in vivo. Our findings indicate that pharmacologic inhibition of HSPA8, achieved either through VER (VER-155008) targeting the nucleotide binding domain or pifithrin-μ targeting the substrate binding domain of HSPA8, significantly potentiates necroptosis induced by diverse treatments in cellular assays. These inhibitors effectively disrupt the binding of HSPA8 to the RHIM protein, impeding its regulatory function on RHIM amyloid formation. Importantly, HSPA8 inhibitors significantly enhanced cancer cell sensitivity to microtubule-targeting agents (MTAs) in vitro, while reversing chemoresistance and facilitating tumor regression by augmenting necroptosis in vivo. Our findings suggest a promising therapeutic approach to cancer through necroptosis modulation via HSPA8 targeting, particularly in combination with MTA drugs for enhanced treatment efficacy.
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Affiliation(s)
- Erpeng Wu
- Shanghai Institute of Biochemistry and Cell Biology, Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai 200031, China
- Department of Respiratory Medicine, Shanghai Chest Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200030, China
| | - Chenlu Wu
- Shanghai Institute of Biochemistry and Cell Biology, Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai 200031, China
| | - Kelong Jia
- Shanghai Institute of Biochemistry and Cell Biology, Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai 200031, China
| | - Shen’ao Zhou
- Celliver Biotechnology Inc., Shanghai 200030, China
| | - Liming Sun
- Shanghai Institute of Biochemistry and Cell Biology, Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai 200031, China
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Ni K, Meng L. Mechanism of PANoptosis in metabolic dysfunction-associated steatotic liver disease. Clin Res Hepatol Gastroenterol 2024; 48:102381. [PMID: 38821484 DOI: 10.1016/j.clinre.2024.102381] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/26/2024] [Revised: 05/16/2024] [Accepted: 05/23/2024] [Indexed: 06/02/2024]
Abstract
In recent years, the incidence of metabolic dysfunction-associated steatotic liver disease (MASLD) has been steadily rising, emerging as a major chronic liver disease of global concern. The course of MASLD is varied, spanning from MASLD to metabolic dysfunction associated steatohepatitis (MASH). MASH is an important contributor to cirrhosis, which may subsequently lead to hepatocellular carcinoma. It has been found that PANoptosis, an emerging inflammatory programmed cell death (PCD), is involved in the pathogenesis of MASLD and facilitates the development of NASH, eventually resulting in inflammatory fibrosis and hepatocyte death. This paper reviews the latest research progress on PANoptosis and MASLD to understand the mechanism of MASLD and provide new directions for future treatment and drug development.
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Affiliation(s)
- Keying Ni
- Department of Gastroenterology, The First Affiliated Hospital of Zhejiang Chinese Medical University (Zhejiang Provincial Hospital of Chinese Medical), Key Laboratory of Digestive Pathophysiology of Zhejiang Province, Hangzhou, China
| | - Lina Meng
- Department of Gastroenterology, The First Affiliated Hospital of Zhejiang Chinese Medical University (Zhejiang Provincial Hospital of Chinese Medical), Key Laboratory of Digestive Pathophysiology of Zhejiang Province, Hangzhou, China.
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Ding X, Sun M, Guo F, Qian X, Yuan H, Lou W, Wang Q, Lei X, Zeng W. Picrasidine S Induces cGAS-Mediated Cellular Immune Response as a Novel Vaccine Adjuvant. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024:e2310108. [PMID: 38900071 DOI: 10.1002/advs.202310108] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2023] [Revised: 05/26/2024] [Indexed: 06/21/2024]
Abstract
New adjuvants that trigger cellular immune responses are urgently needed for the effective development of cancer and virus vaccines. Motivated by recent discoveries that show activation of type I interferon (IFN-I) signaling boosts T cell immunity, this study proposes that targeting this pathway can be a strategic approach to identify novel vaccine adjuvants. Consequently, a comprehensive chemical screening of 6,800 small molecules is performed, which results in the discovery of the natural compound picrasidine S (PS) as an IFN-I inducer. Further analysis reveals that PS acts as a powerful adjuvant, significantly enhancing both humoral and cellular immune responses. At the molecular level, PS initiates the activation of the cGAS-IFN-I pathway, leading to an enhanced T cell response. PS vaccination notably increases the population of CD8+ central memory (TCM)-like cells and boosts the CD8+ T cell-mediated anti-tumor immune response. Thus, this study identifies PS as a promising candidate for developing vaccine adjuvants in cancer prevention.
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Affiliation(s)
- Xiaofan Ding
- Institute for Immunology and School of Basic Medical Sciences, and Beijing Key Laboratory for Immunological Research on Chronic Diseases, Tsinghua University, Beijing, 100084, China
| | - Mengxue Sun
- Institute for Immunology and School of Basic Medical Sciences, and Beijing Key Laboratory for Immunological Research on Chronic Diseases, Tsinghua University, Beijing, 100084, China
| | - Fusheng Guo
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China
| | - Xinmin Qian
- Institute for Immunology and School of Basic Medical Sciences, and Beijing Key Laboratory for Immunological Research on Chronic Diseases, Tsinghua University, Beijing, 100084, China
| | - Haoyu Yuan
- Institute for Immunology and School of Basic Medical Sciences, and Beijing Key Laboratory for Immunological Research on Chronic Diseases, Tsinghua University, Beijing, 100084, China
| | - Wenjiao Lou
- Institute for Immunology and School of Basic Medical Sciences, and Beijing Key Laboratory for Immunological Research on Chronic Diseases, Tsinghua University, Beijing, 100084, China
| | - Qixuan Wang
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China
| | - Xiaoguang Lei
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China
- Peking-Tsinghua Center for Life Sciences, Academy for Advanced Interdisciplinary Studies, Peking University, Beijing, 100871, China
- Institute of Cancer Research, Shen Zhen Bay Laboratory, Shen Zhen, 518107, China
| | - Wenwen Zeng
- Institute for Immunology and School of Basic Medical Sciences, and Beijing Key Laboratory for Immunological Research on Chronic Diseases, Tsinghua University, Beijing, 100084, China
- SXMU-Tsinghua Collaborative Innovation Center for Frontier Medicine, Taiyuan, 030001, China
- Tsinghua-Peking Center for Life Sciences, Beijing, 100084, China
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Zhou Y, Cai Z, Zhai Y, Yu J, He Q, He Y, Jitkaew S, Cai Z. Necroptosis inhibitors: mechanisms of action and therapeutic potential. Apoptosis 2024; 29:22-44. [PMID: 38001341 DOI: 10.1007/s10495-023-01905-6] [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] [Accepted: 10/15/2023] [Indexed: 11/26/2023]
Abstract
Necroptosis is a type of programmed cell death that is morphologically similar to necrosis. This type of cell death is involved in various pathophysiological disorders, including inflammatory, neurodegenerative, infectious, and malignant diseases. Receptor-interacting protein kinase 1 (RIPK1), RIPK3, and mixed lineage kinase domain-like protein (MLKL) pseudokinase constitute the core components of the necroptosis signaling pathway and are considered the most promising targets for therapeutic intervention. The discovery and characterization of necroptosis inhibitors not only accelerate our understanding of the necroptosis signaling pathway but also provide important drug candidates for the treatment of necroptosis-related diseases. Here, we will review recent research progress on necroptosis inhibitors, mechanisms of action and their potential applications for disease treatment.
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Affiliation(s)
- Yingbo Zhou
- School of Medicine, Tongji University, Shanghai, 200092, China
| | - Zhangtao Cai
- School of Medicine, Tongji University, Shanghai, 200092, China
| | - Yijia Zhai
- School of Medicine, Tongji University, Shanghai, 200092, China
| | - Jintao Yu
- School of Medicine, Tongji University, Shanghai, 200092, China
| | - Qiujing He
- School of Life Sciences and Technology, Tongji University, Shanghai, 200092, China
| | - Yuan He
- Tongji University Cancer Center, Shanghai Tenth People's Hospital, School of Medicine, Tongji University, Shanghai, 200092, China
| | - Siriporn Jitkaew
- Center of Excellence for Cancer and Inflammation, Department of Clinical Chemistry, Faculty of Allied Health Sciences, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Zhenyu Cai
- School of Medicine, Tongji University, Shanghai, 200092, China.
- Tongji University Cancer Center, Shanghai Tenth People's Hospital, School of Medicine, Tongji University, Shanghai, 200092, China.
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Xu AP, Xu LB, Smith ER, Fleishman JS, Chen ZS, Xu XX. Cell death in cancer chemotherapy using taxanes. Front Pharmacol 2024; 14:1338633. [PMID: 38249350 PMCID: PMC10796453 DOI: 10.3389/fphar.2023.1338633] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2023] [Accepted: 12/13/2023] [Indexed: 01/23/2024] Open
Abstract
Cancer cells evolve to be refractory to the intrinsic programmed cell death mechanisms, which ensure cellular tissue homeostasis in physiological conditions. Chemotherapy using cytotoxic drugs seeks to eliminate cancer cells but spare non-cancerous host cells by exploring a likely subtle difference between malignant and benign cells. Presumably, chemotherapy agents achieve efficacy by triggering programmed cell death machineries in cancer cells. Currently, many major solid tumors are treated with chemotherapy composed of a combination of platinum agents and taxanes. Platinum agents, largely cis-platin, carboplatin, and oxaliplatin, are DNA damaging agents that covalently form DNA addicts, triggering DNA repair response pathways. Taxanes, including paclitaxel, docetaxel, and cabazitaxel, are microtubule stabilizing drugs which are often very effective in purging cancer cells in clinical settings. Generally, it is thought that the stabilization of microtubules by taxanes leads to mitotic arrest, mitotic catastrophe, and the triggering of apoptotic programmed cell death. However, the precise mechanism(s) of how mitotic arrest and catastrophe activate the caspase pathway has not been established. Here, we briefly review literature on the involvement of potential cell death mechanisms in cancer therapy. These include the classical caspase-mediated apoptotic programmed cell death, necroptosis mediated by MLKL, and pore forming mechanisms in immune cells, etc. In particular, we discuss a newly recognized mechanism of cell death in taxane-treatment of cancer cells that involves micronucleation and the irreversible rupture of the nuclear membrane. Since cancer cells are commonly retarded in responding to programmed cell death signaling, stabilized microtubule bundle-induced micronucleation and nuclear membrane rupture, rather than triggering apoptosis, may be a key mechanism accounting for the success of taxanes as anti-cancer agents.
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Affiliation(s)
- Ana P. Xu
- Department of Biology, University of Miami, Coral Gables, FL, United States
| | - Lucy B. Xu
- Department of Biology, University of Miami, Coral Gables, FL, United States
| | - Elizabeth R. Smith
- Sylvester Comprehensive Cancer Center, University of Miami Miller School of Medicine, Miami, FL, United States
- Department of Obstetrics, Gynecology and Reproductive Sciences, University of Miami Miller School of Medicine, Miami, FL, United States
| | - Joshua S. Fleishman
- College of Pharmacy and Health Sciences, St. John’s University, Queens, NY, United States
| | - Zhe-Sheng Chen
- College of Pharmacy and Health Sciences, St. John’s University, Queens, NY, United States
| | - Xiang-Xi Xu
- Sylvester Comprehensive Cancer Center, University of Miami Miller School of Medicine, Miami, FL, United States
- Department of Radiation Oncology, University of Miami Miller School of Medicine, Miami, FL, United States
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Tak J, Kim SG. Effects of toxicants on endoplasmic reticulum stress and hepatic cell fate determination. Toxicol Res 2023; 39:533-547. [PMID: 37779594 PMCID: PMC10541383 DOI: 10.1007/s43188-023-00201-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Revised: 06/27/2023] [Accepted: 06/29/2023] [Indexed: 10/03/2023] Open
Abstract
Toxicant-induced injury is a significant global health issue. However, the mechanisms through which toxicants such as carbon tetrachloride, acetaminophen, dimethylformamide, cocaine, and morphine induce the death of multiple cell types and contribute to liver toxicity are highly complex. This phenomenon involves intricate signaling pathways in association with oxidative stress, inflammation, and activation of death receptors, which are closely linked to endoplasmic reticulum (ER) stress. ER stress initially triggers the unfolded protein response, which either promotes cell survival or causes cell death at later times, depending on the severity and duration of the stress. Thus, comprehending the molecular basis governing cell fate determination in the context of ER stress may provide key insights into the prevention and treatment of toxicant-induced injury. This review summarizes our current understanding of agents that trigger different forms of ER stress-mediated cell death, necroptosis, ferroptosis, pyroptosis, and apoptosis, and covers the underlying molecular basis of toxicant-induced ER stress, as well as potential target molecules.
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Affiliation(s)
- Jihoon Tak
- College of Pharmacy and Integrated Research Institute for Drug Development, Dongguk University-Seoul, Goyang-si, Kyeonggi-do 10326 Republic of Korea
| | - Sang Geon Kim
- College of Pharmacy and Integrated Research Institute for Drug Development, Dongguk University-Seoul, Goyang-si, Kyeonggi-do 10326 Republic of Korea
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Waugh S, Ranasinghe A, Gomez A, Houston S, Lithgow KV, Eshghi A, Fleetwood J, Conway KME, Reynolds LA, Cameron CE. Syphilis and the host: multi-omic analysis of host cellular responses to Treponema pallidum provides novel insight into syphilis pathogenesis. Front Microbiol 2023; 14:1254342. [PMID: 37795301 PMCID: PMC10546344 DOI: 10.3389/fmicb.2023.1254342] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2023] [Accepted: 09/01/2023] [Indexed: 10/06/2023] Open
Abstract
Introduction Syphilis is a chronic, multi-stage infection caused by the extracellular bacterium Treponema pallidum ssp. pallidum. Treponema pallidum widely disseminates through the vasculature, crosses endothelial, blood-brain and placental barriers, and establishes systemic infection. Although the capacity of T. pallidum to traverse the endothelium is well-described, the response of endothelial cells to T. pallidum exposure, and the contribution of this response to treponemal traversal, is poorly understood. Methods To address this knowledge gap, we used quantitative proteomics and cytokine profiling to characterize endothelial responses to T. pallidum. Results Proteomic analyses detected altered host pathways controlling extracellular matrix organization, necroptosis and cell death, and innate immune signaling. Cytokine analyses of endothelial cells exposed to T. pallidum revealed increased secretion of interleukin (IL)-6, IL-8, and vascular endothelial growth factor (VEGF), and decreased secretion of monocyte chemoattractant protein-1 (MCP-1). Discussion This study provides insight into the molecular basis of syphilis disease symptoms and the enhanced susceptibility of individuals infected with syphilis to HIV co-infection. These investigations also enhance understanding of the host response to T. pallidum exposure and the pathogenic strategies used by T. pallidum to disseminate and persist within the host. Furthermore, our findings highlight the critical need for inclusion of appropriate controls when conducting T. pallidum-host cell interactions using in vitro- and in vivo-grown T. pallidum.
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Affiliation(s)
- Sean Waugh
- Department of Biochemistry and Microbiology, University of Victoria, Victoria, BC, Canada
| | - Akash Ranasinghe
- Department of Biochemistry and Microbiology, University of Victoria, Victoria, BC, Canada
| | - Alloysius Gomez
- Department of Biochemistry and Microbiology, University of Victoria, Victoria, BC, Canada
| | - Simon Houston
- Department of Biochemistry and Microbiology, University of Victoria, Victoria, BC, Canada
| | - Karen V. Lithgow
- Department of Biochemistry and Microbiology, University of Victoria, Victoria, BC, Canada
| | - Azad Eshghi
- University of Victoria-Genome BC Proteomics Centre, Victoria, BC, Canada
| | - Jenna Fleetwood
- Department of Biochemistry and Microbiology, University of Victoria, Victoria, BC, Canada
| | - Kate M. E. Conway
- Department of Biochemistry and Microbiology, University of Victoria, Victoria, BC, Canada
| | - Lisa A. Reynolds
- Department of Biochemistry and Microbiology, University of Victoria, Victoria, BC, Canada
| | - Caroline E. Cameron
- Department of Biochemistry and Microbiology, University of Victoria, Victoria, BC, Canada
- Division of Allergy and Infectious Diseases, Department of Medicine, University of Washington, Seattle, WA, United States
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Zheng X, Wan J, Tan G. The mechanisms of NLRP3 inflammasome/pyroptosis activation and their role in diabetic retinopathy. Front Immunol 2023; 14:1151185. [PMID: 37180116 PMCID: PMC10167027 DOI: 10.3389/fimmu.2023.1151185] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2023] [Accepted: 04/11/2023] [Indexed: 05/15/2023] Open
Abstract
In the working-age population worldwide, diabetic retinopathy (DR), a prevalent complication of diabetes, is the main cause of vision impairment. Chronic low-grade inflammation plays an essential role in DR development. Recently, concerning the pathogenesis of DR, the Nod-Like Receptor Family Pyrin Domain Containing 3 (NLRP3) inflammasome in retinal cells has been determined as a causal factor. In the diabetic eye, the NLRP3 inflammasome is activated by several pathways (such as ROS and ATP). The activation of NPRP3 leads to the secretion of inflammatory cytokines interleukin-1β (IL-1β) and interleukin-18 (IL-18), and leads to pyroptosis, a rapid inflammatory form of lytic programmed cell death (PCD). Cells that undergo pyroptosis swell and rapture, releasing more inflammatory factors and accelerating DR progression. This review focuses on the mechanisms that activate NLRP3 inflammasome and pyroptosis leading to DR. The present research highlighted some inhibitors of NLRP3/pyroptosis pathways and novel therapeutic measures concerning DR treatment.
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Affiliation(s)
- Xiaoqin Zheng
- Department of Ophthalmology, The First Affiliated Hospital, Hengyang Medical School, University of South China, Hengyang, Hunan, China
| | - Jia Wan
- Department of Orthopedics, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Gang Tan
- Department of Ophthalmology, The First Affiliated Hospital, Hengyang Medical School, University of South China, Hengyang, Hunan, China
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Mitroshina EV, Saviuk M, Vedunova MV. Necroptosis in CNS diseases: Focus on astrocytes. Front Aging Neurosci 2023; 14:1016053. [PMID: 36778591 PMCID: PMC9911465 DOI: 10.3389/fnagi.2022.1016053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2022] [Accepted: 12/28/2022] [Indexed: 01/28/2023] Open
Abstract
In the last few years, necroptosis, a recently described type of cell death, has been reported to play an important role in the development of various brain pathologies. Necroptosis is a cell death mechanism that has morphological characteristics similar to necrosis but is mediated by fundamentally different molecular pathways. Necroptosis is initiated by signaling through the interaction of RIP1/RIP3/MLKL proteins (receptor-interacting protein kinase 1/receptor-interacting protein kinase 3/mixed lineage kinase domain-like protein). RIPK1 kinase is usually inactive under physiological conditions. It is activated by stimulation of death receptors (TNFR1, TNFR2, TLR3, and 4, Fas-ligand) by external signals. Phosphorylation of RIPK1 results in the formation of its complex with death receptors. Further, complexes with the second member of the RIP3 and MLKL cascade appear, and the necroptosome is formed. There is enough evidence that necroptosis plays an important role in the pathogenesis of brain ischemia and neurodegenerative diseases. In recent years, a point of view that both neurons and glial cells can play a key role in the development of the central nervous system (CNS) pathologies finds more and more confirmation. Astrocytes play complex roles during neurodegeneration and ischemic brain damage initiating both impair and protective processes. However, the cellular and molecular mechanisms that induce pathogenic activity of astrocytes remain veiled. In this review, we consider these processes in terms of the initiation of necroptosis. On the other hand, it is important to remember that like other types of programmed cell death, necroptosis plays an important role for the organism, as it induces a strong immune response and is involved in the control of cancerogenesis. In this review, we provide an overview of the complex role of necroptosis as an important pathogenetic component of neuronal and astrocyte death in neurodegenerative diseases, epileptogenesis, and ischemic brain damage.
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Mocarski ES. Programmed Necrosis in Host Defense. Curr Top Microbiol Immunol 2023; 442:1-40. [PMID: 37563336 DOI: 10.1007/82_2023_264] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/12/2023]
Abstract
Host control over infectious disease relies on the ability of cells in multicellular organisms to detect and defend against pathogens to prevent disease. Evolution affords mammals with a wide variety of independent immune mechanisms to control or eliminate invading infectious agents. Many pathogens acquire functions to deflect these immune mechanisms and promote infection. Following successful invasion of a host, cell autonomous signaling pathways drive the production of inflammatory cytokines, deployment of restriction factors and induction of cell death. Combined, these innate immune mechanisms attract dendritic cells, neutrophils and macrophages as well as innate lymphoid cells such as natural killer cells that all help control infection. Eventually, the development of adaptive pathogen-specific immunity clears infection and provides immune memory of the encounter. For obligate intracellular pathogens such as viruses, diverse cell death pathways make a pivotal contribution to early control by eliminating host cells before progeny are produced. Pro-apoptotic caspase-8 activity (along with caspase-10 in humans) executes extrinsic apoptosis, a nonlytic form of cell death triggered by TNF family death receptors (DRs). Over the past two decades, alternate extrinsic apoptosis and necroptosis outcomes have been described. Programmed necrosis, or necroptosis, occurs when receptor interacting protein kinase 3 (RIPK3) activates mixed lineage kinase-like (MLKL), causing cell leakage. Thus, activation of DRs, toll-like receptors (TLRs) or pathogen sensor Z-nucleic acid binding protein 1 (ZBP1) initiates apoptosis as well as necroptosis if not blocked by virus-encoded inhibitors. Mammalian cell death pathways are blocked by herpesvirus- and poxvirus-encoded cell death suppressors. Growing evidence has revealed the importance of Z-nucleic acid sensor, ZBP1, in the cell autonomous recognition of both DNA and RNA virus infection. This volume will explore the detente between viruses and cells to manage death machinery and avoid elimination to support dissemination within the host animal.
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Affiliation(s)
- Edward S Mocarski
- Robert W. Woodruff Professor Emeritus, Department of Microbiology and Immunology, Emory University School of Medicine, Atlanta, GA, 30322, USA.
- Professor Emeritus, Department of Microbiology and Immunology, Stanford University School of Medicine, Stanford, CA, 94305, USA.
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ZBP1-Mediated Necroptosis: Mechanisms and Therapeutic Implications. MOLECULES (BASEL, SWITZERLAND) 2022; 28:molecules28010052. [PMID: 36615244 PMCID: PMC9822119 DOI: 10.3390/molecules28010052] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 12/17/2022] [Accepted: 12/20/2022] [Indexed: 12/24/2022]
Abstract
Cell death is a fundamental pathophysiological process in human disease. The discovery of necroptosis, a form of regulated necrosis that is induced by the activation of death receptors and formation of necrosome, represents a major breakthrough in the field of cell death in the past decade. Z-DNA-binding protein (ZBP1) is an interferon (IFN)-inducing protein, initially reported as a double-stranded DNA (dsDNA) sensor, which induces an innate inflammatory response. Recently, ZBP1 was identified as an important sensor of necroptosis during virus infection. It connects viral nucleic acid and receptor-interacting protein kinase 3 (RIPK3) via two domains and induces the formation of a necrosome. Recent studies have also reported that ZBP1 induces necroptosis in non-viral infections and mediates necrotic signal transduction by a unique mechanism. This review highlights the discovery of ZBP1 and its novel findings in necroptosis and provides an insight into its critical role in the crosstalk between different types of cell death, which may represent a new therapeutic option.
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Kang Y, Wang Q. Potential therapeutic value of necroptosis inhibitor for the treatment of COVID-19. Eur J Med Res 2022; 27:283. [PMID: 36494757 PMCID: PMC9733178 DOI: 10.1186/s40001-022-00913-7] [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: 07/15/2022] [Accepted: 11/25/2022] [Indexed: 12/13/2022] Open
Abstract
The coronavirus disease 2019 (COVID-19), caused by a novel virus of the beta-coronavirus genus (SARS-CoV-2), has spread rapidly, posing a significant threat to global health. There are currently no drugs available for effective treatment. Severe cases of COVID-19 are associated with hyperinflammation, also known as cytokine storm syndrome. The reduce inflammation are considered promising treatments for COVID-19. Necroptosis is a type of programmed necrosis involved in immune response to viral infection, and severe inflammatory injury. Inhibition of necroptosis is pivotal in preventing associated inflammatory responses. The expression of key regulators of the necroptosis pathway is generally up-regulated in COVID-19, indicating that the necroptosis pathway is activated. Thus, necroptosis inhibitors are expected to be novel therapeutic candidates for the treatment of COVID-19.Better knowledge of the necroptosis pathway mechanism is urgently required to solve the remaining mysteries surrounding the role of necroptosis in COVID-19. In this review, we briefly introduce the pathogenesis of necroptosis, the relationship between necroptosis, cytokine storm, and COVID-19 also summarizes the progress of inhibitors of necroptosis. This research provides a timely and necessary suggest of the development of necroptosis inhibitors to treat COVID-19 and clinical transformation of inhibitors of necroptosis.
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Affiliation(s)
- Yongan Kang
- grid.254148.e0000 0001 0033 6389 Cardiovascular Medicine, The Second People’s Hospital Affiliated to Three Gorges University/Yichang Second People’s Hospital, Yichang, 443000 China ,grid.254148.e0000 0001 0033 6389Three Gorges University College of Basic Medicine, Yichang, 443000 China
| | - Qinghai Wang
- grid.254148.e0000 0001 0033 6389 Cardiovascular Medicine, The Second People’s Hospital Affiliated to Three Gorges University/Yichang Second People’s Hospital, Yichang, 443000 China ,grid.254148.e0000 0001 0033 6389Three Gorges University College of Basic Medicine, Yichang, 443000 China ,Yichang Clinical Medical Research Center for Prevention and Treatment of Chronic Heart Failure, Yichang, 443000 China
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Cytotoxic Effects of Cannabidiol on Neonatal Rat Cortical Neurons and Astrocytes: Potential Danger to Brain Development. Toxins (Basel) 2022; 14:toxins14100720. [PMID: 36287988 PMCID: PMC9611593 DOI: 10.3390/toxins14100720] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Revised: 10/14/2022] [Accepted: 10/19/2022] [Indexed: 11/29/2022] Open
Abstract
The influence of cannabidiol (CBD) on brain development is inadequately understood. Since CBD is considered a non-intoxicating drug, it has attracted great interest concerning its potential medical applicability, including in pregnant women and children. Here, we elucidated the response of perinatal rat cortical neurons and astrocytes to CBD at submicromolar (0.1, 0.5, 1, 5 µM) concentrations attainable in humans. The effect of CBD was concentration- and time-dependent and cell-specific. In neurons, 0.1 µM CBD induced an early and transient change in mitochondrial membrane potential (ΔΨm), ATP depletion, and caspase-8 activation, followed by rapid ATP recovery and progressive activation of caspase-9 and caspase-3/7, resulting in early apoptotic cell death with reduction and shortening of dendrites, cell shrinkage, and chromatin condensation. The decrease in neuronal viability, ATP depletion, and caspase activation due to CBD exposure was prevented by transient receptor potential vanilloid 1 (TRPV1) antagonist. In astrocytes, 0.5 µM CBD caused an immediate short-term dysregulation of ΔΨm, followed by ATP depletion with transient activation of caspase-8 and progressive activation of caspase-9 and caspase-3/7, leading to early apoptosis and subsequent necroptosis. In astrocytes, both TRPV1 and cannabinoid receptor 1 (CB<sub>1</sub>) antagonists protected viability and prevented apoptosis. Given that CBD is a non-intoxicating drug, our results clearly show that this is not the case during critical periods of brain development when it can significantly interfere with the endogenous cannabinoid system.
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14
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RIPK3 inhibitor-AZD5423 alleviates acute kidney injury by inhibiting necroptosis and inflammation. Int Immunopharmacol 2022; 112:109262. [PMID: 36166972 DOI: 10.1016/j.intimp.2022.109262] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2022] [Revised: 09/07/2022] [Accepted: 09/16/2022] [Indexed: 11/20/2022]
Abstract
Acute kidney injury (AKI) is a clinical syndrome that is defined as a sudden decline in renal function and characterized by inflammation and programmed cell death of renal tubular epithelial cells. Necroptosis is a form of regulated cell death that requires activation of receptor interacting protein kinase 3 (RIPK3) and its phosphorylation of the substrate MLKL. RIPK3 plays an important role in acute kidney injury, and hence developing its inhibitors is considered as one of the promising strategies aimed at prevention and treatment of AKI. Recently, we discovered AZD5423 as a novel potent RIPK3 inhibitor using a computer-aided hybrid virtual screening strategy according to three-dimensional structure of RIPK3. Our findings revealed that AZD5423 strongly inhibits activation of RIPK3, and MLKL phosphorylation upon cisplatin-, hypoxia/reoxygenation (H/R)- and TNF-α stimuli as compared with GSK872, which is a previously identified RIPK3 inhibitor. Importantly, AZD5423 exerts effective protection against cisplatin- and ischemia/reperfusion (I/R)-induced AKI mouse model. The results of cellular thermal shift assay and experiments in RIPK3 knockout cells indicated that AZD5423 could directly target RIPK3 to inhibit RIPK3 kinase activity. Mechanistically, the docking of AZD5423 and RIPK3 suggested that the kinase domain of RIPK3 for Lys50, Arg313, Lys29, Arg37 might form hydrogen bonds with AZD5423. Site-directed mutagenesis further revealed that AZD5423 reduces injury response via interacting with the key RIPK3 amino acid residues of Lys50 and Arg313. In conclusion, our study has demonstrated that AZD5423 may serve as a potent inhibitor of RIPK3 kinase and a promising clinical candidate for AKI treatment.
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15
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Cui B, Yan B, Wang K, Li L, Chen S, Zhang Z. Discovery of a New Class of Uracil Derivatives as Potential Mixed Lineage Kinase Domain-like Protein (MLKL) Inhibitors. J Med Chem 2022; 65:12747-12780. [PMID: 36136378 DOI: 10.1021/acs.jmedchem.2c00548] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Necroptosis is a form of programmed cell death. Mixed lineage kinase domain-like protein (MLKL) is the necroptosis executor, and it is involved in various diseases such as tissue damage and neurodegeneration-related diseases. Here, we report the development of novel MLKL inhibitors with a uracil nucleus through scaffold morphing from our previously reported xanthine MLKL inhibitor TC13172. After a rational structure-activity relationship study, we obtained the highly potent compounds 56 and 66. Mechanism studies revealed that these compounds partially inhibited MLKL oligomerization and significantly inhibited MLKL translocation to the membrane. Compared with TC13172, 56 and 66 have a different mode of action and, importantly, their reaction rate with glutathione is more than 150-fold lower. This reduction in potential off-target effects and cell toxicity makes this series an attractive starting point for further drug development for MLKL-related disease treatments.
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Affiliation(s)
- Bo Cui
- College of Life Sciences, Beijing Normal University, Beijing 100875, China.,National Institute of Biological Sciences (NIBS), Beijing 102206, China
| | - Bo Yan
- National Institute of Biological Sciences (NIBS), Beijing 102206, China
| | - Kang Wang
- National Institute of Biological Sciences (NIBS), Beijing 102206, China
| | - Lin Li
- National Institute of Biological Sciences (NIBS), Beijing 102206, China
| | - She Chen
- National Institute of Biological Sciences (NIBS), Beijing 102206, China
| | - Zhiyuan Zhang
- National Institute of Biological Sciences (NIBS), Beijing 102206, China
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16
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Macrophage Infiltration Initiates RIP3/MLKL-Dependent Necroptosis in Paclitaxel-Induced Neuropathic Pain. Mediators Inflamm 2022; 2022:1567210. [PMID: 36164389 PMCID: PMC9508459 DOI: 10.1155/2022/1567210] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2022] [Revised: 08/22/2022] [Accepted: 08/29/2022] [Indexed: 11/18/2022] Open
Abstract
Paclitaxel (PTX) is a commonly used antitumor drug. Approximately 80% of all patients receiving PTX chemotherapy develop chemotherapy-induced peripheral neuropathy (CIPN), limiting the use of PTX. Moreover, CIPN responds poorly to conventional analgesics. Experimental evidence suggests that the neuroinflammatory response plays an essential role in paclitaxel-induced peripheral neuropathy (PIPN). Previous studies have confirmed that dorsal root ganglion (DRG) neuron necroptosis and accompanying inflammation are linked with PIPN; however, the potential upstream regulatory mechanisms remain unclear. Preclinical studies have also established that macrophage infiltration in the DRG is associated with PIPN. TNF-α released by activated macrophages is the primary regulatory signal of necroptosis. In this study, we established a rat model of PIPN via quartic PTX administration (accumulated dose: 8 mg/kg, i.p.). The regulatory effect of macrophage infiltration on necroptosis in PIPN was observed using a macrophage scavenging agent (clodronate disodium). The results showed that PTX increased macrophage infiltration and the levels of TNF-α and IL-1β in the DRG. PTX also upregulated the levels of necroptosis-related proteins, including receptor-interacting protein kinase (RIP3) and mixed-lineage kinase domain-like protein (MLKL) in DRG neurons and promoted MLKL phosphorylation, resulting in neuronal necrosis and hyperalgesia. In contrast, clodronate disodium effectively removed macrophages, reduced the levels of RIP3, MLKL, and pMLKL, and decreased the number of necrotic cells in the DRG of PIPN rats, alleviating the behavioral pain abnormalities. These results suggest that PTX promotes macrophage infiltration, which results in the release of TNF-α and IL-1β in the DRG and the initiation of neuronal necroptosis via the RIP3/MLKL pathway, ultimately leading to neuropathic pain.
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17
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Jin S, Zhang T, Fu X, Duan Z, Sun J, Wang Y. Aniline exposure activates receptor-interacting serine/threonineprotein kinase 1 and causes necroptosis of AML12 cells. Toxicol Ind Health 2022; 38:444-454. [PMID: 35658749 DOI: 10.1177/07482337221106751] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
With the increased use of aniline, potential impacts on human health cannot be ignored. The hepatotoxicity of aniline is largely unknown and the underlying mechanism remains unclear. Therefore, the aim of the present study was to investigate the hepatotoxicity of aniline and elucidate the underlying mechanism. AML12 cells were exposed to different concentrations of aniline (0, 5, 10, or 20 mM) to observe changes to reactive oxygen species (ROS) production and the expression patterns of necroptosis-related proteins (RIPK1, RIPK3, and MLKL). The potential mechanism underlying aniline-induced hepatotoxicity was explored by knockout of RIPK1. The results showed that aniline induced cytotoxicity in AML12 cells in a dose-dependent manner in addition to the production of ROS and subsequent necroptosis of AML12 cells. Silencing of RIPK1 reversed upregulation of necroptosis-related proteins in AML12 cells exposed to aniline, demonstrating that aniline-induced ROS production was related to necroptosis of AML12. Moreover, aniline promoted intracellular RIPK1 activation, suggesting that the RIPK1/ROS pathway plays an important role in aniline-induced hepatotoxicity. NAC could quench ROS and inhibit necroptosis. These results provide a scientific basis for future studies of aniline-induced hepatotoxicity for the prevention and treatment of aniline-induced cytotoxicity.
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Affiliation(s)
- Shuo Jin
- Department of Occupational Health, School of Public Health, 34707Harbin Medical University, Harbin, China
| | - Tong Zhang
- Department of Occupational Health, School of Public Health, 34707Harbin Medical University, Harbin, China
| | - Xinyu Fu
- Department of Occupational Health, School of Public Health, 34707Harbin Medical University, Harbin, China
| | - Zhongliang Duan
- Department of Occupational Health, School of Public Health, 34707Harbin Medical University, Harbin, China
| | - Jianwen Sun
- Department of Occupational Health, School of Public Health, 34707Harbin Medical University, Harbin, China
| | - Yue Wang
- Department of Occupational Health, School of Public Health, 34707Harbin Medical University, Harbin, China
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18
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He F, Zheng G, Hu J, Ge W, Ji X, Bradley JL, Peberdy MA, Ornato JP, Tang W. Necrosulfonamide improves post-resuscitation myocardial dysfunction via inhibiting pyroptosis and necroptosis in a rat model of cardiac arrest. Eur J Pharmacol 2022; 926:175037. [PMID: 35588872 DOI: 10.1016/j.ejphar.2022.175037] [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: 08/02/2021] [Revised: 05/08/2022] [Accepted: 05/12/2022] [Indexed: 11/24/2022]
Abstract
The systemic inflammatory response following global myocardial ischemia/reperfusion (I/R) injury is a critical driver of poor outcomes. Both pyroptosis and necroptosis are involved in the systemic inflammatory response and contribute to regional myocardial I/R injury. This study aimed to explore the effect of necrosulfonamide (NSA) on post-resuscitation myocardial dysfunction in a rat model of cardiac arrest. Sprague-Dawley rats were randomly categorized to Sham, CPR and CPR-NSA groups. For rats in the latter two groups, ventricular fibrillation was induced without treatment for 6 min, with cardiopulmonary resuscitation (CPR) being sustained for 8 min. Rats were injected with NSA (10 mg/kg in DMSO) or vehicle at 5 min following return of spontaneous circulation. Myocardial function was measured by echocardiography, survival and neurological deficit score (NDS) were recorded at 24, 48, and 72 h after ROSC. Western blotting was used to assess pyroptosis- and necroptosis-related protein expression. ELISAs were used to measure levels of inflammatory cytokine. Rats in the CPR-NSA group were found to exhibit superior post-resuscitation myocardial function, and better NDS values in the group of CPR-NSA. Rats in the group of CPR-NSA exhibited median survival duration of 68 ± 8 h as compared to 34 ± 21 h in the CPR group. After treatment with NSA, NOD-like receptor 3 (NLRP3), GSDMD-N, phosphorylated-MLKL, and phosphorylated-RIP3 levels in cardiac tissue were reduced with corresponding reductions in inflammatory cytokine levels. Administration of NSA significantly improved myocardial dysfunction succeeding global myocardial I/R injury and enhanced survival outcomes through protective mechanisms potentially related to inhibition of pyroptosis and necroptosis pathways.
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Affiliation(s)
- Fenglian He
- Department of Respiratory Medicine, The Second Affiliated Hospital of Anhui Medical University, Hefei, China; Weil Institute of Emergency and Critical Care Research, Virginia Commonwealth University, Richmond, VA, USA.
| | - Guanghui Zheng
- Weil Institute of Emergency and Critical Care Research, Virginia Commonwealth University, Richmond, VA, USA.
| | - Juntao Hu
- Weil Institute of Emergency and Critical Care Research, Virginia Commonwealth University, Richmond, VA, USA.
| | - Weiwei Ge
- Department of Respiratory Medicine, The Second Affiliated Hospital of Anhui Medical University, Hefei, China; Weil Institute of Emergency and Critical Care Research, Virginia Commonwealth University, Richmond, VA, USA.
| | - Xianfei Ji
- Weil Institute of Emergency and Critical Care Research, Virginia Commonwealth University, Richmond, VA, USA.
| | - Jennifer L Bradley
- Weil Institute of Emergency and Critical Care Research, Virginia Commonwealth University, Richmond, VA, USA.
| | - Mary Ann Peberdy
- Departments of Internal Medicine and Emergency Medicine, Virginia Commonwealth University Health System, Richmond, VA, USA.
| | - Joseph P Ornato
- Department of Emergency Medicine, Virginia Commonwealth University Health System, Richmond, VA, USA.
| | - Wanchun Tang
- Department of Respiratory Medicine, The Second Affiliated Hospital of Anhui Medical University, Hefei, China; Weil Institute of Emergency and Critical Care Research, Virginia Commonwealth University, Richmond, VA, USA; Department of Emergency Medicine, Virginia Commonwealth University Health System, Richmond, VA, USA.
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19
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Xu W, Huang Y. Regulation of Inflammatory Cell Death by Phosphorylation. Front Immunol 2022; 13:851169. [PMID: 35300338 PMCID: PMC8921259 DOI: 10.3389/fimmu.2022.851169] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2022] [Accepted: 02/09/2022] [Indexed: 12/13/2022] Open
Abstract
Cell death is a necessary event in multi-cellular organisms to maintain homeostasis by eliminating unrequired or damaged cells. Currently, there are many forms of cell death, and several of them, such as necroptosis, pyroptosis and ferroptosis, even apoptosis trigger an inflammatory response by releasing damage-associated molecular patterns (DAMPs), which are involved in the pathogenesis of a variety of human inflammatory diseases, including autoimmunity disease, diabetes, Alzheimer’s disease and cancer. Therefore, the occurrence of inflammatory cell death must be strictly regulated. Recently, increasing studies suggest that phosphorylation plays a critical role in inflammatory cell death. In this review, we will summarize current knowledge of the regulatory role of phosphorylation in inflammatory cell death and also discuss the promising treatment strategy for inflammatory diseases by targeting related protein kinases that mediate phosphorylation or phosphatases that mediate dephosphorylation.
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Affiliation(s)
- Wen Xu
- Neurology Department, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, China
| | - Yi Huang
- Wuxi School of Medicine, Jiangnan University, Wuxi, China
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20
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Zhuang J, Xie L, Zheng L. A Glimpse of Programmed Cell Death Among Bacteria, Animals, and Plants. Front Cell Dev Biol 2022; 9:790117. [PMID: 35223864 PMCID: PMC8866957 DOI: 10.3389/fcell.2021.790117] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2021] [Accepted: 11/24/2021] [Indexed: 12/15/2022] Open
Abstract
Programmed cell death (PCD) in animals mainly refers to lytic and non-lytic forms. Disruption and integrity of the plasma membrane are considered as hallmarks of lytic and apoptotic cell death, respectively. These lytic cell death programs can prevent the hosts from microbial pathogens. The key to our understanding of these cases is pattern recognition receptors, such as TLRs in animals and LRR-RLKs in plants, and nod-like receptors (NLRs). Herein, we emphatically discuss the biochemical and structural studies that have clarified the anti-apoptotic and pro-apoptotic functions of Bcl-2 family proteins during intrinsic apoptosis and how caspase-8 among apoptosis, necroptosis, and pyroptosis sets the switchable threshold and integrates innate immune signaling, and that have compared the similarity and distinctness of the apoptosome, necroptosome, and inflammasome. We recapitulate that the necroptotic MLKL pore, pyroptotic gasdermin pore, HR-inducing resistosome, and mitochondrial Bcl-2 family all can form ion channels, which all directly boost membrane disruption. Comparing the conservation and unique aspects of PCD including ferrroptosis among bacteria, animals, and plants, the commonly shared immune domains including TIR-like, gasdermin-like, caspase-like, and MLKL/CC-like domains act as arsenal modules to restructure the diverse architecture to commit PCD suicide upon stresses/stimuli for host community.
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Affiliation(s)
- Jun Zhuang
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, Fujian Agriculture and Forestry University, Fuzhou, China
- Institute of Plant Virology, Fujian Agriculture and Forestry University, Fuzhou, China
- *Correspondence: Jun Zhuang,
| | - Li Xie
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, Fujian Agriculture and Forestry University, Fuzhou, China
- Institute of Plant Virology, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Luping Zheng
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, Fujian Agriculture and Forestry University, Fuzhou, China
- Institute of Plant Virology, Fujian Agriculture and Forestry University, Fuzhou, China
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21
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Necroptosis in pulmonary macrophages promotes silica-induced inflammation and interstitial fibrosis in mice. Toxicol Lett 2022; 355:150-159. [PMID: 34843873 DOI: 10.1016/j.toxlet.2021.11.015] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Revised: 11/22/2021] [Accepted: 11/24/2021] [Indexed: 01/17/2023]
Abstract
Silicosis is a disease characterized by extensive lung nodules and fibrosis caused by the prolonged inhalation of silica in occupational settings. However, the molecular mechanism of silicosis development is complex and not fully understood. Furthermore, the role of necroptosis, a death receptor-mediated and caspase-independent mode of inflammatory cell death, is not well understood in silicosis. Here, we demonstrate that the necroptotic signaling pathway of macrophages is significantly activated in the lungs of silicosis mouse models. Meanwhile, increased M1 macrophage infiltration and up-regulation of pro-inflammatory cytokines (TNF-α, IL-6) were observed in our silicosis model. Notably, the expression of the pro-fibrotic factor, TGF-β1, and fibrosis biomarkers α-SMA and collagen I were also unregulated; however, these phenomena were recovered by Nec-1, an inhibitor specific for RIP1 kinase-dependent necroptosis. We conclude that macrophage-mediated necroptosis promotes the progression of silicosis by enhancing lung inflammatory responses and fibrogenesis in a mouse model of silicosis. These findings provide new insights for drug discovery and clinical treatment of silicosis.
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22
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Zhu X, Yang N, Yang Y, Yuan F, Yu D, Zhang Y, Shu Z, Nan N, Hu H, Liu X, Chen S, Sun L, Wang H. Spontaneous necroptosis and autoinflammation are blocked by an inhibitory phosphorylation on MLKL during neonatal development. Cell Res 2021; 32:407-410. [PMID: 34728815 PMCID: PMC8975819 DOI: 10.1038/s41422-021-00583-w] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Accepted: 09/10/2021] [Indexed: 11/10/2022] Open
Affiliation(s)
- Xinxin Zhu
- School of Life Science and Technology, ShanghaiTech University, Shanghai, China.,State Key Laboratory of Cell Biology, CAS Center for Excellence in Molecular Cell Science, Shanghai Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Na Yang
- State Key Laboratory of Cell Biology, CAS Center for Excellence in Molecular Cell Science, Shanghai Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Yu Yang
- State Key Laboratory of Cell Biology, CAS Center for Excellence in Molecular Cell Science, Shanghai Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Feiyang Yuan
- School of Life Science and Technology, ShanghaiTech University, Shanghai, China.,State Key Laboratory of Cell Biology, CAS Center for Excellence in Molecular Cell Science, Shanghai Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Dandan Yu
- School of Life Science and Technology, ShanghaiTech University, Shanghai, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Yu Zhang
- School of Life Science and Technology, ShanghaiTech University, Shanghai, China.,State Key Laboratory of Cell Biology, CAS Center for Excellence in Molecular Cell Science, Shanghai Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Zhaoqian Shu
- School of Life Science and Technology, ShanghaiTech University, Shanghai, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Ning Nan
- School of Life Science and Technology, ShanghaiTech University, Shanghai, China.,State Key Laboratory of Cell Biology, CAS Center for Excellence in Molecular Cell Science, Shanghai Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Hong Hu
- School of Life Science and Technology, ShanghaiTech University, Shanghai, China
| | - Xiaoyan Liu
- School of Life Science and Technology, ShanghaiTech University, Shanghai, China
| | - She Chen
- National Institute of Biological Sciences, Beijing, China.,Tsinghua Institute of Multidisciplinary Biomedical Research, Tsinghua University, Beijing, China
| | - Liming Sun
- State Key Laboratory of Cell Biology, CAS Center for Excellence in Molecular Cell Science, Shanghai Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, China. .,University of Chinese Academy of Sciences, Beijing, China.
| | - Huayi Wang
- School of Life Science and Technology, ShanghaiTech University, Shanghai, China.
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23
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Positive Charges in the Brace Region Facilitate the Membrane Disruption of MLKL-NTR in Necroptosis. Molecules 2021; 26:molecules26175194. [PMID: 34500630 PMCID: PMC8433767 DOI: 10.3390/molecules26175194] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2021] [Revised: 08/17/2021] [Accepted: 08/19/2021] [Indexed: 11/17/2022] Open
Abstract
Necroptosis is a type of programmed cell death executed through the plasma membrane disruption by mixed lineage kinase domain-like protein (MLKL). Previous studies have revealed that an N-terminal four-helix bundle domain (NBD) of MLKL is the executioner domain for the membrane permeabilization, which is auto-inhibited by the first brace helix (H6). After necroptosis initiation, this inhibitory brace helix detaches and the NBD can integrate into the membrane, and hence leads to necroptotic cell death. However, how the NBD is released and induces membrane rupture is poorly understood. Here, we reconstituted MLKL2–154 into membrane mimetic bicelles and observed the structure disruption and membrane release of the first brace helix that is regulated by negatively charged phospholipids in a dose-dependent manner. Using molecular dynamics simulation we found that the brace region in an isolated, auto-inhibited MLKL2–154 becomes intrinsically disordered in solution after 7 ns dynamic motion. Further investigations demonstrated that a cluster of arginines in the C-terminus of MLKL2–154 is important for the molecular conformational switch. Functional mutagenesis showed that mutating these arginines to glutamates hindered the membrane disruption of full-length MLKL and thus inhibited the necroptotic cell death. These findings suggest that the brace helix also plays an active role in MLKL regulation, rather than an auto-inhibitory domain.
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24
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Ma D, Zhao S, Liu X, Li Z, Li H, Liu J, Cao J, Wang X. RIP3/MLKL pathway-regulated necroptosis: A new mechanism of paclitaxel-induced peripheral neuropathy. J Biochem Mol Toxicol 2021; 35:e22834. [PMID: 34056794 DOI: 10.1002/jbt.22834] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2021] [Revised: 04/12/2021] [Accepted: 05/19/2021] [Indexed: 11/07/2022]
Abstract
Paclitaxel (PTX) chemotherapy treatment often leads to neuropathic pain, which is resistant to available analgesic treatments. Death of cells and neuroinflammatory response are associated with PTX-induced peripheral neuropathy (PIPN). Necroptosis is a form of regulated necrotic cell death that accompanies strong inflammatory response. It is mediated by receptor-interacting protein kinase 3 (RIP3) and mixed-lineage kinase domain-like protein (MLKL), which contribute to the pathogenesis of several neurodegenerative diseases. Nevertheless, the role of necroptosis in PIPN remains unexplored. The aim of this study was to investigate the role of necroptosis in PIPN using its antagonists (necrostatin-1 and Nec-1). The quartic PTX administration (accumulated dose: 8 mg/kg, ip) in rats induced robust hyperalgesia and allodynia with significant cell necrosis and an increase in proinflammatory cytokines in the dorsal root ganglion (DRG). PTX application also increased RIP3 and MLKL protein levels in DRG, which were primarily in neurons. Moreover, it also promoted satellite glial cells (SGCs) activation, as assayed by glial fibrillary acidic protein (GFAP) upregulation. All these PTX-induced changes were prevented by the Nec-1 treatment. When taken together, the present study indicated that RIP3/MLKL pathway-regulated neuronal necroptosis, which promoted an inflammatory cascade reaction in DRG, might be a new mechanism of PIPN.
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Affiliation(s)
- Dongyang Ma
- Department of Anesthesiology, The Third Hospital of Hebei Medical University, Shijiazhuang, China
| | - Shuang Zhao
- Department of Anesthesiology, The Third Hospital of Hebei Medical University, Shijiazhuang, China
| | - Xin Liu
- Department of Anesthesiology, The Third Hospital of Hebei Medical University, Shijiazhuang, China
| | - Zhao Li
- Department of Anesthesiology, The Third Hospital of Hebei Medical University, Shijiazhuang, China
| | - Huizhou Li
- Department of Anesthesiology, The Third Hospital of Hebei Medical University, Shijiazhuang, China
| | - Jiaxin Liu
- Department of Anesthesiology, The Third Hospital of Hebei Medical University, Shijiazhuang, China
| | - Jing Cao
- Department of Anesthesiology, The Third Hospital of Hebei Medical University, Shijiazhuang, China
| | - Xiuli Wang
- Department of Anesthesiology, The Third Hospital of Hebei Medical University, Shijiazhuang, China
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25
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Zhao X, Lu J, Chen X, Gao Z, Zhang C, Chen C, Qiao D, Wang H. Methamphetamine exposure induces neuronal programmed necrosis by activating the receptor-interacting protein kinase 3 -related signalling pathway. FASEB J 2021; 35:e21561. [PMID: 33864423 DOI: 10.1096/fj.202100188r] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Revised: 03/10/2021] [Accepted: 03/15/2021] [Indexed: 12/11/2022]
Abstract
Methamphetamine (METH) is a synthetic drug with severe neurotoxicity, however, the regulation of METH-induced neuronal programmed necrosis remains poorly understood. The aim of this study was to identify the molecular mechanisms of METH-induced neuronal programmed necrosis. We found that neuronal programmed necrosis occurred in the striatum of brain samples from human and mice that were exposed to METH. The receptor-interacting protein kinase 3 (RIP3) was highly expressed in the neurons of human and mice exposed to METH, and RIP3-silenced or RIP1-inhibited protected neurons developed neuronal programmed necrosis in vitro and in vivo following METH exposure. Moreover, the RIP1-RIP3 complex causes cell programmed necrosis by regulating mixed lineage kinase domain-like protein (MLKL)-mediated cell membrane rupture and dynamin-related protein 1 (Drp1)-mediated mitochondrial fission. Together, these data indicate that RIP3 plays an indispensable role in the mechanism of METH-induced neuronal programmed necrosis, which may represent a potential therapeutic target for METH-induced neurotoxicity.
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Affiliation(s)
- Xu Zhao
- School of Forensic Medicine, Southern Medical University, Guangzhou, P.R. China
| | - Jiancong Lu
- School of Forensic Medicine, Southern Medical University, Guangzhou, P.R. China
| | - Xuebing Chen
- School of Forensic Medicine, Southern Medical University, Guangzhou, P.R. China
| | - Zhengxiang Gao
- School of Forensic Medicine, Southern Medical University, Guangzhou, P.R. China
| | - Cui Zhang
- School of Forensic Medicine, Southern Medical University, Guangzhou, P.R. China
| | - Chuanxiang Chen
- School of Forensic Medicine, Southern Medical University, Guangzhou, P.R. China
| | - Dongfang Qiao
- School of Forensic Medicine, Southern Medical University, Guangzhou, P.R. China
| | - Huijun Wang
- School of Forensic Medicine, Southern Medical University, Guangzhou, P.R. China
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26
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Balaji S, Terrero D, Tiwari AK, Ashby CR, Raman D. Alternative approaches to overcome chemoresistance to apoptosis in cancer. ADVANCES IN PROTEIN CHEMISTRY AND STRUCTURAL BIOLOGY 2021; 126:91-122. [PMID: 34090621 DOI: 10.1016/bs.apcsb.2021.01.005] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Apoptosis, or programmed cell death, is a form of regulated cell death (RCD) that is essential for organogenesis and homeostatic maintenance of normal cell populations. Apoptotic stimuli activate the intrinsic and/or extrinsic pathways to induce cell death due to perturbations in the intracellular and extracellular microenvironments, respectively. In patients with cancer, the induction of apoptosis by anticancer drugs and radiation can produce cancer cell death. However, tumor cells can adapt and become refractory to apoptosis-inducing therapies, resulting in the development of clinical resistance to apoptosis. Drug resistance facilitates the development of aggressive primary tumors that eventually metastasize, leading to therapy failure and mortality. To overcome the resistance to apoptosis to neoadjuvant chemotherapy or targeted therapy, alternative targets of RCD can be induced in apoptosis-resistant cancer cells. Alternatively, cell death can be independent of apoptosis and this strategy could be utilized to develop novel anti-cancer therapies. This chapter discusses approaches that could be employed to overcome clinical resistance to apoptosis in cancer cells.
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Affiliation(s)
- Swapnaa Balaji
- Department of Pharmacology & Experimental Therapeutics, College of Pharmacy and Pharmaceutical Sciences, University of Toledo Health Science Campus, Toledo, OH, United States
| | - David Terrero
- Department of Pharmacology & Experimental Therapeutics, College of Pharmacy and Pharmaceutical Sciences, University of Toledo Health Science Campus, Toledo, OH, United States
| | - Amit K Tiwari
- Department of Pharmacology & Experimental Therapeutics, College of Pharmacy and Pharmaceutical Sciences, University of Toledo Health Science Campus, Toledo, OH, United States
| | - Charles R Ashby
- Department of Pharmaceutical Sciences, College of Pharmacy, St. John's University, New York, NY, United States
| | - Dayanidhi Raman
- Department of Cancer Biology, College of Medicine and Life Sciences, University of Toledo Health Science Campus, Toledo, OH, United States.
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Roedig J, Kowald L, Juretschke T, Karlowitz R, Ahangarian Abhari B, Roedig H, Fulda S, Beli P, van Wijk SJL. USP22 controls necroptosis by regulating receptor-interacting protein kinase 3 ubiquitination. EMBO Rep 2021; 22:e50163. [PMID: 33369872 PMCID: PMC7857539 DOI: 10.15252/embr.202050163] [Citation(s) in RCA: 45] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2020] [Revised: 10/21/2020] [Accepted: 11/03/2020] [Indexed: 12/27/2022] Open
Abstract
Dynamic control of ubiquitination by deubiquitinating enzymes is essential for almost all biological processes. Ubiquitin-specific peptidase 22 (USP22) is part of the SAGA complex and catalyzes the removal of mono-ubiquitination from histones H2A and H2B, thereby regulating gene transcription. However, novel roles for USP22 have emerged recently, such as tumor development and cell death. Apart from apoptosis, the relevance of USP22 in other programmed cell death pathways still remains unclear. Here, we describe a novel role for USP22 in controlling necroptotic cell death in human tumor cell lines. Loss of USP22 expression significantly delays TNFα/Smac mimetic/zVAD.fmk (TBZ)-induced necroptosis, without affecting TNFα-mediated NF-κB activation or extrinsic apoptosis. Ubiquitin remnant profiling identified receptor-interacting protein kinase 3 (RIPK3) lysines 42, 351, and 518 as novel, USP22-regulated ubiquitination sites during necroptosis. Importantly, mutation of RIPK3 K518 reduced necroptosis-associated RIPK3 ubiquitination and amplified necrosome formation and necroptotic cell death. In conclusion, we identify a novel role of USP22 in necroptosis and further elucidate the relevance of RIPK3 ubiquitination as crucial regulator of necroptotic cell death.
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Affiliation(s)
- Jens Roedig
- Institute for Experimental Cancer Research in PediatricsGoethe‐UniversityFrankfurt am MainGermany
| | - Lisa Kowald
- Institute for Experimental Cancer Research in PediatricsGoethe‐UniversityFrankfurt am MainGermany
| | | | - Rebekka Karlowitz
- Institute for Experimental Cancer Research in PediatricsGoethe‐UniversityFrankfurt am MainGermany
| | - Behnaz Ahangarian Abhari
- Lighthouse Core FacilityZentrum für Translationale ZellforschungUniversitaetsklinikum FreiburgKlinik für Innere Medizin IFreiburgGermany
| | - Heiko Roedig
- Pharmazentrum FrankfurtInstitut für Allgemeine Pharmakologie und ToxikologieGoethe‐UniversityFrankfurt am MainGermany
| | - Simone Fulda
- Institute for Experimental Cancer Research in PediatricsGoethe‐UniversityFrankfurt am MainGermany
| | - Petra Beli
- Institute of Molecular Biology (IMB)MainzGermany
| | - Sjoerd JL van Wijk
- Institute for Experimental Cancer Research in PediatricsGoethe‐UniversityFrankfurt am MainGermany
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28
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Wu Y, Dong G, Sheng C. Targeting necroptosis in anticancer therapy: mechanisms and modulators. Acta Pharm Sin B 2020; 10:1601-1618. [PMID: 33088682 PMCID: PMC7563021 DOI: 10.1016/j.apsb.2020.01.007] [Citation(s) in RCA: 48] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2019] [Revised: 11/19/2019] [Accepted: 12/30/2019] [Indexed: 02/07/2023] Open
Abstract
Necroptosis, a genetically programmed form of necrotic cell death, serves as an important pathway in human diseases. As a critical cell-killing mechanism, necroptosis is associated with cancer progression, metastasis, and immunosurveillance. Targeting necroptosis pathway by small molecule modulators is emerging as an effective approach in cancer therapy, which has the advantage to bypass the apoptosis-resistance and maintain antitumor immunity. Therefore, a better understanding of the mechanism of necroptosis and necroptosis modulators is necessary to develop novel strategies for cancer therapy. This review will summarize recent progress of the mechanisms and detecting methods of necroptosis. In particular, the relationship between necroptosis and cancer therapy and medicinal chemistry of necroptosis modulators will be focused on.
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29
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XJB-5-131 inhibited ferroptosis in tubular epithelial cells after ischemia-reperfusion injury. Cell Death Dis 2020; 11:629. [PMID: 32796819 PMCID: PMC7429848 DOI: 10.1038/s41419-020-02871-6] [Citation(s) in RCA: 125] [Impact Index Per Article: 31.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2020] [Revised: 07/28/2020] [Accepted: 07/29/2020] [Indexed: 02/07/2023]
Abstract
Regulated necrosis has been reported to exert an important role in the pathogenesis of various diseases, including renal ischemia-reperfusion (I/R) injury. Damage to renal tubular epithelial cells and subsequent cell death initiate the progression of acute kidney injury (AKI) and subsequent chronic kidney disease (CKD). We found that ferroptosis appeared in tubular epithelial cells (TECs) of various human kidney diseases and the upregulation of tubular proferroptotic gene ACSL4 was correlated with renal function in patients with acute kidney tubular injury. XJB-5-131, which showed high affinity for TECs, attenuated I/R-induced renal injury and inflammation in mice by specifically inhibiting ferroptosis rather than necroptosis and pyroptosis. Single-cell RNA sequencing (scRNA-seq) indicated that ferroptosis-related genes were mainly expressed in tubular epithelial cells after I/R injury, while few necroptosis- and pyroptosis-associated genes were identified to express in this cluster of cell. Taken together, ferroptosis plays an important role in renal tubular injury and the inhibition of ferroptosis by XJB-5-131 is a promising therapeutic strategy for protection against renal tubular cell injury in kidney diseases.
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RIP3-mediated necroptosis is regulated by inter-filament assembly of RIP homotypic interaction motif. Cell Death Differ 2020; 28:251-266. [PMID: 32737444 PMCID: PMC7853141 DOI: 10.1038/s41418-020-0598-9] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2020] [Revised: 07/11/2020] [Accepted: 07/20/2020] [Indexed: 01/15/2023] Open
Abstract
Necroptosis is mediated by signaling complexes called necrosomes, which contain receptor-interacting protein 3 (RIP3) and upstream effectors, such as RIP1. In necrosomes, the RIP homotypic interaction motif (RHIM) of RIP3 and RIP1 forms amyloidal complex. But how the amyloidal necrosomes control RIP3 activation and cell necroptosis has not been determined. Here, we showed that RIP3 amyloid fibrils could further assemble into large fibrillar networks which presents as cellular puncta during necroptosis. A viral RHIM-containing necroptosis inhibitor M45 could form heteroamyloid with RIP3 in cells and prevent RIP3 puncta formation and cell necroptosis. We characterized mutual antagonism between RIP3–RHIM and M45–RHIM in necroptosis regulation, which was caused by distinct inter-filament interactions in RIP3, M45 amyloids revealed with atomic force microscopy. Moreover, double mutations Asn464 and Met468 in RIP3–RHIM to Asp disrupted RIP3 kinase-dependent necroptosis. While the mutant RIP3(N464D/M468D) could form amyloid as wild type upon necroptosis induction. Based on these results, we propose that RIP3 amyloid formation is required but not sufficient in necroptosis signaling, the ordered inter-filament assembly of RIP3 is critical in RIP3 amyloid mediated kinase activation and cell necroptosis.
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31
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Le X, Mu J, Peng W, Tang J, Xiang Q, Tian S, Feng Y, He S, Qiu Z, Ren G, Huang A, Lin Y, Tao Q, Xiang T. DNA methylation downregulated ZDHHC1 suppresses tumor growth by altering cellular metabolism and inducing oxidative/ER stress-mediated apoptosis and pyroptosis. Theranostics 2020; 10:9495-9511. [PMID: 32863941 PMCID: PMC7449911 DOI: 10.7150/thno.45631] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2020] [Accepted: 07/16/2020] [Indexed: 12/11/2022] Open
Abstract
Cancer progression is an intricate biological process profiled by not only unscheduled proliferation, but also altered metabolism mechanisms. In this article, we introduced a novel tumor suppressor gene (TSG), Zinc Finger DHHC-Type Containing 1 (ZDHHC1, also known as ZNF377), frequently silenced due to epigenetic modification among various cancers, which exerts significant anti-tumor effects through metabolic regulation. Methods: Quantitative reversed-transcription PCR (qRT-PCR), reverse transcription PCR (RT-PCR) and Western blot were employed to demonstrate transcriptional and protein levels of targeted regulators. Methylation of ZDHHC1 promoter was detected by bisulfite genomic sequencing (BGS) and methylation specific PCR (MSP). Proteomics were analyzed by isobaric tags for relative and absolute quantitation (iTRAQ) and gas chromatography-mass spectrometry (GC-MS) were utilized for metabolomics analysis. Cellular functions were examined via corresponding approaches. Nude mice were used for xenograft tumor models. Indirect immunofluorescence staining was utilized to obtain precise location and expression of target proteins. Oxidative and ER stress indicators were detected using specific kits. Results: We found that ZDHHC1 expression was frequently silenced in multiple tumor cells and specimens due to methylation. Restoration of ZDHHC1 expression can curb cancer cell progression via stimulating apoptosis and cell cycle arrest, repressing metastasis, and reversing EMT transition and cell stemness. ZDHHC1's salient anti-tumor abilities were recognized in vivo as well. Metabolomic and proteomic analyses predicted inhibitory role of ZDHHC1 in glucose metabolism pathways in a CYGB-dependent manner, and in pentose phosphate pathway (PPP), which was validated by examining altered key factors. Moreover, we unraveled that ZDHHC1 dedicates to the increment of oxidative stress and endoplasmic reticulum (ER) stress to promote pyroptosis for anticancer purposes. Conclusion: Our study for the first time indicates ZDHHC1 is a potential tumor-suppressor frequently silenced due to promoter methylation, capable of negatively regulating metabolisms of tumor cells while stimulating oxidative stress and ER stress to expedite cell death through induction of pyroptosis and apoptosis, which can be exploited for development of new cancer prevention and therapies.
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Affiliation(s)
- Xin Le
- Key Laboratory of Molecular Oncology and Epigenetics, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Junhao Mu
- Key Laboratory of Molecular Oncology and Epigenetics, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Weiyan Peng
- Key Laboratory of Molecular Oncology and Epigenetics, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Jun Tang
- Key Laboratory of Molecular Oncology and Epigenetics, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Qin Xiang
- Key Laboratory of Molecular Oncology and Epigenetics, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Shaorong Tian
- Key Laboratory of Molecular Oncology and Epigenetics, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Yixiao Feng
- Key Laboratory of Molecular Oncology and Epigenetics, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Sanxiu He
- Key Laboratory of Molecular Oncology and Epigenetics, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Zhu Qiu
- Key Laboratory of Molecular Oncology and Epigenetics, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Guosheng Ren
- Key Laboratory of Molecular Oncology and Epigenetics, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Ailong Huang
- MOE Key Laboratory of Molecular Biology for Infectious Diseases, Department of Infectious Disease, Chongqing Medical University, China
| | - Yong Lin
- Lovelace Respiratory Research Institute, Albuquerque, New Mexico, USA
| | - Qian Tao
- Key Laboratory of Molecular Oncology and Epigenetics, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
- Cancer Epigenetics Laboratory, Department of Clinical Oncology, State Key Laboratory of Translational Oncology, Sir YK Pao Center for Cancer and Li Ka Shing Institute of Health Sciences, The Chinese University of Hong Kong, Hong Kong
| | - Tingxiu Xiang
- Key Laboratory of Molecular Oncology and Epigenetics, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
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Abstract
Immune cells use a variety of membrane-disrupting proteins [complement, perforin, perforin-2, granulysin, gasdermins, mixed lineage kinase domain-like pseudokinase (MLKL)] to induce different kinds of death of microbes and host cells, some of which cause inflammation. After activation by proteolytic cleavage or phosphorylation, these proteins oligomerize, bind to membrane lipids, and disrupt membrane integrity. These membrane disruptors play a critical role in both innate and adaptive immunity. Here we review our current knowledge of the functions, specificity, activation, and regulation of membrane-disrupting immune proteins and what is known about the mechanisms behind membrane damage, the structure of the pores they form, how the cells expressing these lethal proteins are protected, and how cells targeted for destruction can sometimes escape death by repairing membrane damage.
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Affiliation(s)
- Xing Liu
- Center for Microbes, Development and Health; Key Laboratory of Molecular Virology and Immunology; Institut Pasteur of Shanghai; Chinese Academy of Sciences, Shanghai 200031, China;
| | - Judy Lieberman
- Program in Cellular and Molecular Medicine, Boston Children's Hospital and Department of Pediatrics, Harvard Medical School, Boston, Massachusetts 02115, USA;
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Necroptosis-blocking compound NBC1 targets heat shock protein 70 to inhibit MLKL polymerization and necroptosis. Proc Natl Acad Sci U S A 2020; 117:6521-6530. [PMID: 32156734 DOI: 10.1073/pnas.1916503117] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Necroptosis is a regulated necrotic cell death pathway involved in development and disease. Its signaling cascade results in the formation of disulfide bond-dependent amyloid-like polymers of mixed lineage kinase domain-like protein (MLKL), which mediate proinflammatory cell membrane disruption. We screened compound libraries provided by the National Cancer Institute and identified a small-molecule inhibitor of necroptosis named necroptosis-blocking compound 1 (NBC1). Biotin-labeled NBC1 specifically conjugates to heat shock protein Hsp70. NBC1 and PES-Cl, a known Hsp70 substrate-binding inhibitor, block the formation of MLKL polymers, but not MLKL tetramers in necroptosis-induced cells. In vitro, recombinant Hsp70 interacts with the N-terminal domain (NTD) of MLKL and promotes NTD polymerization, which has been shown to mediate the cell killing activity. Furthermore, the substrate-binding domain (SBD) of Hsp70 is sufficient to promote MLKL polymerization. NBC1 covalently conjugates cysteine 574 and cysteine 603 of the SBD to block its function. In addition, an SBD mutant with both cysteines mutated to serines loses its ability to promote MLKL polymerization. Interestingly, knockdown of Hsp70 in cells leads to MLKL destabilization, suggesting that MLKL might also be a client protein of Hsp70. In summary, using NBC1, an inhibitor of necroptosis, we identified Hsp70 as a molecular chaperone performing dual functions in necroptosis. It stabilizes MLKL protein under normal condition and promotes MLKL polymerization through its substrate-binding domain during necroptosis.
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34
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CK1α, CK1δ, and CK1ε are necrosome components which phosphorylate serine 227 of human RIPK3 to activate necroptosis. Proc Natl Acad Sci U S A 2020; 117:1962-1970. [PMID: 31932442 DOI: 10.1073/pnas.1917112117] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Necroptosis is a regulated necrotic cell death pathway, mediated by a supermolecular complex called the necrosome, which contains receptor-interacting protein kinase 1 and 3 (RIPK1, RIPK3) and mixed-lineage kinase domain-like protein (MLKL). Phosphorylation of human RIPK3 at serine 227 (S227) has been shown to be required for downstream MLKL binding and necroptosis progression. Tandem immunoprecipitation of RIPK3 reveals that casein kinase 1 (CK1) family proteins associate with the necrosome upon necroptosis induction, and this interaction depends on the kinase activity of RIPK3. In addition, CK1 proteins colocalize with RIPK3 puncta during necroptosis. Importantly, CK1 proteins directly phosphorylate RIPK3 at S227 in vitro and in vivo. Loss of CK1 proteins abolishes S227 phosphorylation and blocks necroptosis. Furthermore, a RIPK3 mutant with mutations in the CK1 recognition motif fails to be phosphorylated at S227, does not bind or phosphorylate MLKL, and is unable to activate necroptosis. These results strongly suggest that CK1 proteins are necrosome components which are responsible for RIPK3-S227 phosphorylation.
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35
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Effects of prostaglandin F 2α (PGF 2α) on cell-death pathways in the bovine corpus luteum (CL). BMC Vet Res 2019; 15:416. [PMID: 31752870 PMCID: PMC6873574 DOI: 10.1186/s12917-019-2167-3] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2019] [Accepted: 11/06/2019] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Prostaglandin F2α (PGF2α) may differentially affect viability of luteal cells by inducing either proliferation or cell death (via apoptosis or necroptosis). The diverse effects of PGF2α may depend on its local vs. systemic actions. In our study, we determined changes in expression of genes related to: (i) apoptosis: caspase (CASP) 3, CASP8, BCL2 associated X (BAX), B-cell lymphoma 2 (BCL2) and (ii) necroptosis: receptor-interacting protein kinase (RIPK) 1, RIPK3, cylindromatosis (CYLD), and mixed lineage kinase domain-like (MLKL) in the early and mid-stage corpus luteum (CL) that accompany local (intra-CL) vs. systemic (i.m.) analogue of PGF2α (aPGF2α) actions. Cows at day 4 (n = 24) or day 10 (n = 24) of the estrous cycle were treated by injections as follows: (1) systemic saline, (2) systemic aPGF2α (25 mg; Dinoprost), (3) local saline, (4) local aPGF2α (2.5 mg; Dinoprost). After 4 h, CLs were collected by ovariectomy. Expression levels of mRNA and protein were investigated by RT-q PCR, Western blotting and immunohistochemistry, respectively. RESULTS We found that local and systemic administration of aPGF2α in the early-stage CL resulted in decreased expression of CASP3 (P < 0.01), but CASP8 mRNA expression was up-regulated (P < 0.05). However, the expression of CASP3 was up-regulated after local aPGF2α treatment in the middle-stage CL, whereas systemic aPGF2α administration increased both CASP3 and CASP8 expression (P < 0.01). Moreover, we observed that both local and systemic aPGF2α injections increased RIPK1, RIPK3 and MLKL expression in the middle-stage CL (P < 0.05) while CYLD expression was markedly higher after i.m. aPGF2α injections (P < 0.001). Moreover, we investigated the localization of necroptotic factors (RIPK1, RIPK3, CYLD and MLKL) in bovine CL tissue after local and systemic aPGF2α injections in the bovine CL. CONCLUSION Our results demonstrated for the first time that genes related to cell death pathways exhibit stage-specific responses to PGF2α administration depending on its local or systemic actions. Locally-acting PGF2α plays a luteoprotective role by inhibiting apoptosis and necroptosis in the early CL. Necroptosis is a potent mechanism responsible for structural CL regression during PGF2α-induced luteolysis in cattle.
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36
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Kandi MR, Mohammadnejad J, Abdoli A, Amiran MR, Soleymani S, Aghasadeghi MR, Zabihollahi R, Baesi K. In vitro effect of branched polyethyleneimine (bPEI) on cells infected with human immunodeficiency virus: enhancement of viral replication. Arch Virol 2019; 164:3019-3026. [PMID: 31598843 DOI: 10.1007/s00705-019-04426-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2019] [Accepted: 09/09/2019] [Indexed: 10/25/2022]
Abstract
Polyethyleneimine (PEI) is a chemical compound that used is as a carrier in gene therapy/delivery. Some studies have investigated the microbicidal potential and antiviral activity (prophylactic or therapeutic) of PEI and its derivatives. The aim of this study was to investigate the effect of branched polyethyleneimine (bPEI) on human immunodeficiency virus (HIV) replication. Infected cells were treated with bPEI for 36 hours, and the concentration of the viral protein P24 (as a virus replication marker) was determined in cell culture supernatants. This study indicated that bPEI increased HIV replication and decreased the viability of infected cells through cytotoxicity. The toxicity of bPEI its association with and cell death (apoptosis, autophagy and necrosis) have been reported in several studies. To investigate bPEI-induced cytotoxicity, we examined apoptosis and autophagy in cells treated with bPEI, and a significant increase in HIV viral load, the P24 antigen level, autophagy, and necrosis observed. Thus, treatment with bPEI leads to cytotoxicity and higher HIV virus yield.
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Affiliation(s)
- Mohammad Reza Kandi
- Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.,Student Research Committee, Tabriz University of Medical Sciences, Tabriz, Iran.,Department of Life science engineering, Faculty of New Science and Technology, University of Tehran, Tehran, Iran
| | - Javad Mohammadnejad
- Department of Life science engineering, Faculty of New Science and Technology, University of Tehran, Tehran, Iran
| | - Asghar Abdoli
- Hepatitis and AIDS Department, Pasteur Institute of Iran, P.O. Box 14115-331, Tehran, Iran
| | - Mohammad Reza Amiran
- Hepatitis and AIDS Department, Pasteur Institute of Iran, P.O. Box 14115-331, Tehran, Iran
| | - Sepehr Soleymani
- Hepatitis and AIDS Department, Pasteur Institute of Iran, P.O. Box 14115-331, Tehran, Iran
| | | | - Rezvan Zabihollahi
- Hepatitis and AIDS Department, Pasteur Institute of Iran, P.O. Box 14115-331, Tehran, Iran
| | - Kazem Baesi
- Hepatitis and AIDS Department, Pasteur Institute of Iran, P.O. Box 14115-331, Tehran, Iran.
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37
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Yang J, Zhao Y, Zhang L, Fan H, Qi C, Zhang K, Liu X, Fei L, Chen S, Wang M, Kuang F, Wang Y, Wu S. RIPK3/MLKL-Mediated Neuronal Necroptosis Modulates the M1/M2 Polarization of Microglia/Macrophages in the Ischemic Cortex. Cereb Cortex 2019; 28:2622-2635. [PMID: 29746630 PMCID: PMC5998990 DOI: 10.1093/cercor/bhy089] [Citation(s) in RCA: 92] [Impact Index Per Article: 18.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2017] [Indexed: 12/28/2022] Open
Abstract
Cell death and subsequent inflammation are 2 key pathological changes occurring in cerebral ischemia. Active microglia/macrophages play a double-edged role depending on the balance of their M1/M2 phenotypes. Necrosis is the predominant type of cell death following ischemia. However, how necrotic cells modulate the M1/M2 polarization of microglia/macrophages remains poorly investigated. Here, we reported that ischemia induces a rapid RIPK3/MLKL-mediated neuron-dominated necroptosis, a type of programmed necrosis. Ablating RIPK3 or MLKL could switch the activation of microglia/macrophages from M1 to the M2 type in the ischemic cortex. Conditioned medium of oxygen-glucose deprivation (OGD)-treated wild-type (WT) neurons induced M1 polarization, while that of RIPK3−/− neurons favored M2 polarization. OGD treatment induces proinflammatory IL-18 and TNFα in WT but not in RIPK3−/− neurons, which in turn upregulate anti-inflammatory IL-4 and IL-10. Furthermore, the expression of Myd88—a common downstream adaptor of toll-like receptors—is significantly upregulated in the microglia/macrophages of ischemic WT but not of RIPK3−/− or MLKL−/− cortices. Antagonizing the function of Myd88 could phenocopy the effects of RIPK3/MLKL-knockout on the polarization of microglia/macrophages and was neuroprotective. Our data revealed a novel role of necroptotic neurons in modulating the M1/M2 balance of microglia/macrophages in the ischemic cortex, possibly through Myd88 signaling.
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Affiliation(s)
- Jiping Yang
- Department of Neurobiology and Institute of Neurosciences, School of Basic Medicine, Fourth Military Medical University, 169 Chang Le Xi Road, Xi'an, Shaanxi, China.,Department of Anatomy, Shaanxi Key Laboratory of Brain Disorders and Institute of Basic Medical Sciences, Xi'an Medical University, 1 Xin Wang Road, Xi'an, Shaanxi, China
| | - Youyi Zhao
- Department of Neurobiology and Institute of Neurosciences, School of Basic Medicine, Fourth Military Medical University, 169 Chang Le Xi Road, Xi'an, Shaanxi, China.,School of Basic Medicine, Chengdu Medical College, Chengdu, China
| | - Li Zhang
- Department of Neurobiology and Institute of Neurosciences, School of Basic Medicine, Fourth Military Medical University, 169 Chang Le Xi Road, Xi'an, Shaanxi, China.,Department of Anatomy, Shaanxi Key Laboratory of Brain Disorders and Institute of Basic Medical Sciences, Xi'an Medical University, 1 Xin Wang Road, Xi'an, Shaanxi, China
| | - Hong Fan
- Department of Neurobiology and Institute of Neurosciences, School of Basic Medicine, Fourth Military Medical University, 169 Chang Le Xi Road, Xi'an, Shaanxi, China
| | - Chuchu Qi
- Department of Neurobiology and Institute of Neurosciences, School of Basic Medicine, Fourth Military Medical University, 169 Chang Le Xi Road, Xi'an, Shaanxi, China
| | - Kun Zhang
- Department of Neurobiology and Institute of Neurosciences, School of Basic Medicine, Fourth Military Medical University, 169 Chang Le Xi Road, Xi'an, Shaanxi, China
| | - Xinyu Liu
- Department of Neurobiology and Institute of Neurosciences, School of Basic Medicine, Fourth Military Medical University, 169 Chang Le Xi Road, Xi'an, Shaanxi, China
| | - Lin Fei
- Department of Psychiatry, The First Affiliated Hospital of Xi'an Jiaotong University, 277 Yan Ta Western Road, Xi'an, Shaanxi, China
| | - Siwei Chen
- Department of Neurobiology and Institute of Neurosciences, School of Basic Medicine, Fourth Military Medical University, 169 Chang Le Xi Road, Xi'an, Shaanxi, China
| | - Mengmeng Wang
- Department of Neurobiology and Institute of Neurosciences, School of Basic Medicine, Fourth Military Medical University, 169 Chang Le Xi Road, Xi'an, Shaanxi, China
| | - Fang Kuang
- Department of Neurobiology and Institute of Neurosciences, School of Basic Medicine, Fourth Military Medical University, 169 Chang Le Xi Road, Xi'an, Shaanxi, China
| | - Yazhou Wang
- Department of Neurobiology and Institute of Neurosciences, School of Basic Medicine, Fourth Military Medical University, 169 Chang Le Xi Road, Xi'an, Shaanxi, China
| | - Shengxi Wu
- Department of Neurobiology and Institute of Neurosciences, School of Basic Medicine, Fourth Military Medical University, 169 Chang Le Xi Road, Xi'an, Shaanxi, China
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Xie X, Yuan C, Yin L, Zhu Q, Ma N, Chen W, Ding Y, Xiao W, Gong W, Lu G, Xu Z, Li W. NQDI-1 protects against acinar cell necrosis in three experimental mouse models of acute pancreatitis. Biochem Biophys Res Commun 2019; 520:211-217. [PMID: 31587872 DOI: 10.1016/j.bbrc.2019.09.125] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2019] [Accepted: 09/27/2019] [Indexed: 01/22/2023]
Abstract
NQDI-1, an inhibitor of ASK1, has been reported to have protective effects in several experimental human disease models. However, the role of NQDI-1 in acute pancreatitis (AP) has not been reported. In this study, we found that NQDI-1 could attenuate histological damage of pancreatic tissue as well as the levels of serum amylase and lipase in a mouse model of AP induced by caerulein. Moreover, the production of reactive oxygen species (ROS) and the expression of necrosis-related proteins (RIP3 and p-MLKL) were also reduced after NQDI-1 administration. Correspondingly, we elucidated the effect of NQDI-1 in vitro and found that NQDI-1 protected against pancreatic acinar cells necrosis via decreasing the ROS production and RIP3 and p-MLKL expression. In addition, we identified the protective effect of NQDI-1 on AP through two other mouse models induced by l-arginine and pancreatic duct ligation. Taken together, these findings showed that NQDI-1 could reduce the acinar cells necrosis and alleviate the severity of AP, which may afford a new therapeutic target on pancreatic necrosis in AP clinically.
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Affiliation(s)
- Xiaochun Xie
- Department of Critical Care Medicine, PLA Key Laboratory of Emergency and Critical Care Research, Jinling Hospital, Nanjing Medical University, Nanjing, Jiangsu, China; Department of Gastroenterology, Affiliated Hospital of Yangzhou University, Yangzhou University, Yangzhou, Jiangsu, China
| | - Chenchen Yuan
- Department of Critical Care Medicine, PLA Key Laboratory of Emergency and Critical Care Research, Jinling Hospital, Medical School of Nanjing University, Nanjing, Jiangsu, China
| | - Ling Yin
- Department of Gastroenterology, Affiliated Hospital of Yangzhou University, Yangzhou University, Yangzhou, Jiangsu, China
| | - Qingtian Zhu
- Department of Gastroenterology, Affiliated Hospital of Yangzhou University, Yangzhou University, Yangzhou, Jiangsu, China
| | - Nan Ma
- Department of Critical Care Medicine, PLA Key Laboratory of Emergency and Critical Care Research, Jinling Hospital, Medical School of Nanjing University, Nanjing, Jiangsu, China
| | - Weiwei Chen
- Department of Gastroenterology, Clinical Medical College, Yangzhou University, Yangzhou University, Yangzhou, Jiangsu, China
| | - Yanbing Ding
- Department of Gastroenterology, Affiliated Hospital of Yangzhou University, Yangzhou University, Yangzhou, Jiangsu, China
| | - Weiming Xiao
- Department of Gastroenterology, Affiliated Hospital of Yangzhou University, Yangzhou University, Yangzhou, Jiangsu, China
| | - Weijuan Gong
- Department of Gastroenterology, Affiliated Hospital of Yangzhou University, Yangzhou University, Yangzhou, Jiangsu, China; Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, College of Veterinary Medicine, Yangzhou University, Yangzhou, Jiangsu, China
| | - Guotao Lu
- Department of Critical Care Medicine, PLA Key Laboratory of Emergency and Critical Care Research, Jinling Hospital, Nanjing Medical University, Nanjing, Jiangsu, China; Department of Gastroenterology, Affiliated Hospital of Yangzhou University, Yangzhou University, Yangzhou, Jiangsu, China; Department of Critical Care Medicine, PLA Key Laboratory of Emergency and Critical Care Research, Jinling Hospital, Medical School of Nanjing University, Nanjing, Jiangsu, China
| | - Zhenglei Xu
- Department of Gastroenterology, The Second Clinical Medical College (Shenzhen People's Hospital), Jinan University, Shenzhen, 518000, Guangdong, China.
| | - Weiqin Li
- Department of Critical Care Medicine, PLA Key Laboratory of Emergency and Critical Care Research, Jinling Hospital, Nanjing Medical University, Nanjing, Jiangsu, China; Department of Critical Care Medicine, PLA Key Laboratory of Emergency and Critical Care Research, Jinling Hospital, Medical School of Nanjing University, Nanjing, Jiangsu, China.
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Yuan S, Yu Z, Zhang Z, Zhang J, Zhang P, Li X, Li H, Shen H, Chen G. RIP3 participates in early brain injury after experimental subarachnoid hemorrhage in rats by inducing necroptosis. Neurobiol Dis 2019; 129:144-158. [PMID: 31082470 DOI: 10.1016/j.nbd.2019.05.004] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2018] [Revised: 04/22/2019] [Accepted: 05/09/2019] [Indexed: 12/17/2022] Open
Abstract
Necroptosis is a regulated form of necrosis that is mediated by a variety of proteins including tumor necrosis factor-α (TNF-α) and receptor-interacting proteins (RIPs). TNF-α, a critical inflammatory molecule, is one of the initiating signals in the necroptosis pathway, and RIP3 acts as a switch that commits the cell to necroptosis. Subarachnoid hemorrhage (SAH) is a common type of hemorrhagic stroke with high mortality and disability rates. RIP3 has been studied in many central nervous system (CNS) diseases, but its role in SAH has not been investigated in depth. Here, we used an autologous-blood injection model to study the role of RIP3 in brain injury induced by SAH in rats. Several indexes such as brain edema, loss of blood-brain barrier (BBB) integrity, and behavioral tests of neurological function were used to evaluate brain damage in SAH-injured rats. We found that the expression of RIP3 was increased in the rat brain after SAH, reaching the highest point 24 h post-injury. We also showed that genetic or pharmacological inhibition of RIP3 or TNF-α reduced the brain damage induced by SAH, whereas overexpression of RIP3 aggravated brain injury and neurological damage. Additionally, we verified the presence of RIP3-mediated necroptosis in an in vitro SAH model of primary cultured neurons treated with conditioned medium from primary microglia activated by oxygen hemoglobin (OxyHb). Collectively, our findings indicated that RIP3 contributed to brain damage after SAH by inducing necroptosis.
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Affiliation(s)
- Shuai Yuan
- Department of Neurosurgery & Brain and Nerve Research Laboratory, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu Province, China
| | - Zhengquan Yu
- Department of Neurosurgery & Brain and Nerve Research Laboratory, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu Province, China
| | - Zhuwei Zhang
- Department of Neurosurgery & Brain and Nerve Research Laboratory, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu Province, China
| | - Juyi Zhang
- Department of Neurosurgery & Brain and Nerve Research Laboratory, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu Province, China
| | - Peng Zhang
- Department of Neurosurgery & Brain and Nerve Research Laboratory, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu Province, China
| | - Xiang Li
- Department of Neurosurgery & Brain and Nerve Research Laboratory, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu Province, China
| | - Haiying Li
- Department of Neurosurgery & Brain and Nerve Research Laboratory, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu Province, China
| | - Haitao Shen
- Department of Neurosurgery & Brain and Nerve Research Laboratory, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu Province, China.
| | - Gang Chen
- Department of Neurosurgery & Brain and Nerve Research Laboratory, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu Province, China.
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McNamara DE, Dovey CM, Hale AT, Quarato G, Grace CR, Guibao CD, Diep J, Nourse A, Cai CR, Wu H, Kalathur RC, Green DR, York JD, Carette JE, Moldoveanu T. Direct Activation of Human MLKL by a Select Repertoire of Inositol Phosphate Metabolites. Cell Chem Biol 2019; 26:863-877.e7. [PMID: 31031142 DOI: 10.1016/j.chembiol.2019.03.010] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2018] [Revised: 02/08/2019] [Accepted: 03/15/2019] [Indexed: 12/29/2022]
Abstract
Necroptosis is an inflammatory form of programmed cell death executed through plasma membrane rupture by the pseudokinase mixed lineage kinase domain-like (MLKL). We previously showed that MLKL activation requires metabolites of the inositol phosphate (IP) pathway. Here we reveal that I(1,3,4,6)P4, I(1,3,4,5,6)P5, and IP6 promote membrane permeabilization by MLKL through directly binding the N-terminal executioner domain (NED) and dissociating its auto-inhibitory region. We show that IP6 and inositol pentakisphosphate 2-kinase (IPPK) are required for necroptosis as IPPK deletion ablated IP6 production and inhibited necroptosis. The NED auto-inhibitory region is more extensive than originally described and single amino acid substitutions along this region induce spontaneous necroptosis by MLKL. Activating IPs bind three sites with affinity of 100-600 μM to destabilize contacts between the auto-inhibitory region and NED, thereby promoting MLKL activation. We therefore uncover MLKL's activating switch in NED triggered by a select repertoire of IP metabolites.
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Affiliation(s)
- Dan E McNamara
- Department of Structural Biology, St. Jude Children's Research Hospital, Memphis, TN 38105, USA; Department of Chemical Biology and Therapeutics, St. Jude Children's Research Hospital, Memphis, TN 38105, USA
| | - Cole M Dovey
- Department of Microbiology and Immunology, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Andrew T Hale
- Department of Biochemistry, Vanderbilt University School of Medicine, Nashville, TN 37232, USA
| | - Giovanni Quarato
- Department of Immunology, St. Jude Children's Research Hospital, Memphis, TN 38105, USA
| | - Christy R Grace
- Department of Structural Biology, St. Jude Children's Research Hospital, Memphis, TN 38105, USA
| | - Cristina D Guibao
- Department of Structural Biology, St. Jude Children's Research Hospital, Memphis, TN 38105, USA; Department of Chemical Biology and Therapeutics, St. Jude Children's Research Hospital, Memphis, TN 38105, USA
| | - Jonathan Diep
- Department of Microbiology and Immunology, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Amanda Nourse
- Molecular Interaction Analysis Shared Resource, St. Jude Children's Research Hospital, Memphis, TN 38105, USA
| | - Casey R Cai
- Department of Structural Biology, St. Jude Children's Research Hospital, Memphis, TN 38105, USA; Department of Chemical Biology and Therapeutics, St. Jude Children's Research Hospital, Memphis, TN 38105, USA
| | - Hong Wu
- Department of Structural Biology, St. Jude Children's Research Hospital, Memphis, TN 38105, USA
| | - Ravi C Kalathur
- Department of Structural Biology, St. Jude Children's Research Hospital, Memphis, TN 38105, USA
| | - Douglas R Green
- Department of Immunology, St. Jude Children's Research Hospital, Memphis, TN 38105, USA
| | - John D York
- Department of Biochemistry, Vanderbilt University School of Medicine, Nashville, TN 37232, USA
| | - Jan E Carette
- Department of Microbiology and Immunology, Stanford University School of Medicine, Stanford, CA 94305, USA.
| | - Tudor Moldoveanu
- Department of Structural Biology, St. Jude Children's Research Hospital, Memphis, TN 38105, USA; Department of Chemical Biology and Therapeutics, St. Jude Children's Research Hospital, Memphis, TN 38105, USA.
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41
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Axonal Degeneration Is Mediated by Necroptosis Activation. J Neurosci 2019; 39:3832-3844. [PMID: 30850513 DOI: 10.1523/jneurosci.0881-18.2019] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2018] [Revised: 02/01/2019] [Accepted: 02/14/2019] [Indexed: 01/22/2023] Open
Abstract
Axonal degeneration, which contributes to functional impairment in several disorders of the nervous system, is an important target for neuroprotection. Several individual factors and subcellular events have been implicated in axonal degeneration, but researchers have so far been unable to identify an integrative signaling pathway activating this self-destructive process. Through pharmacological and genetic approaches, we tested whether necroptosis, a regulated cell-death mechanism implicated in the pathogenesis of several neurodegenerative diseases, is involved in axonal degeneration. Pharmacological inhibition of the necroptotic kinase RIPK1 using necrostatin-1 strongly delayed axonal degeneration in the peripheral nervous system and CNS of wild-type mice of either sex and protected in vitro sensory axons from degeneration after mechanical and toxic insults. These effects were also observed after genetic knock-down of RIPK3, a second key regulator of necroptosis, and the downstream effector MLKL (Mixed Lineage Kinase Domain-Like). RIPK1 inhibition prevented mitochondrial fragmentation in vitro and in vivo, a typical feature of necrotic death, and inhibition of mitochondrial fission by Mdivi also resulted in reduced axonal loss in damaged nerves. Furthermore, electrophysiological analysis demonstrated that inhibition of necroptosis delays not only the morphological degeneration of axons, but also the loss of their electrophysiological function after nerve injury. Activation of the necroptotic pathway early during injury-induced axonal degeneration was made evident by increased phosphorylation of the downstream effector MLKL. Our results demonstrate that axonal degeneration proceeds by necroptosis, thus defining a novel mechanistic framework in the axonal degenerative cascade for therapeutic interventions in a wide variety of conditions that lead to neuronal loss and functional impairment.SIGNIFICANCE STATEMENT We show that axonal degeneration triggered by diverse stimuli is mediated by the activation of the necroptotic programmed cell-death program by a cell-autonomous mechanism. This work represents a critical advance for the field since it identifies a defined degenerative pathway involved in axonal degeneration in both the peripheral nervous system and the CNS, a process that has been proposed as an early event in several neurodegenerative conditions and a major contributor to neuronal death. The identification of necroptosis as a key mechanism for axonal degeneration is an important step toward the development of novel therapeutic strategies for nervous-system disorders, particularly those related to chemotherapy-induced peripheral neuropathies or CNS diseases in which axonal degeneration is a common factor.
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Wang S, Yuan YH, Chen NH, Wang HB. The mechanisms of NLRP3 inflammasome/pyroptosis activation and their role in Parkinson's disease. Int Immunopharmacol 2019; 67:458-464. [DOI: 10.1016/j.intimp.2018.12.019] [Citation(s) in RCA: 186] [Impact Index Per Article: 37.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2018] [Revised: 11/26/2018] [Accepted: 12/07/2018] [Indexed: 01/15/2023]
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43
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Pham CL, Shanmugam N, Strange M, O'Carroll A, Brown JW, Sierecki E, Gambin Y, Steain M, Sunde M. Viral M45 and necroptosis-associated proteins form heteromeric amyloid assemblies. EMBO Rep 2018; 20:embr.201846518. [PMID: 30498077 DOI: 10.15252/embr.201846518] [Citation(s) in RCA: 55] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2018] [Revised: 11/05/2018] [Accepted: 11/07/2018] [Indexed: 01/24/2023] Open
Abstract
The murine cytomegalovirus protein M45 protects infected mouse cells from necroptotic death and, when heterologously expressed, can protect human cells from necroptosis induced by tumour necrosis factor receptor (TNFR) activation. Here, we show that the N-terminal 90 residues of the M45 protein, which contain a RIP homotypic interaction motif (RHIM), are sufficient to confer protection against TNFR-induced necroptosis. This N-terminal region of M45 drives rapid self-assembly into homo-oligomeric amyloid fibrils and interacts with the RHIMs of the human kinases RIPK1 and RIPK3, and the Z-DNA binding protein 1 (ZBP1), to form heteromeric amyloid fibrils in vitro Mutation of the tetrad residues in the M45 RHIM attenuates homo- and hetero-amyloid assembly by M45, suggesting that the amyloidogenic nature of the M45 RHIM underlies its biological activity. The M45 RHIM preferentially interacts with RIPK3 and ZBP1 over RIPK1 and alters the properties of the host RHIM protein assemblies. Our results indicate that M45 mimics the interactions made by RIPK1 or ZBP1 with RIPK3, thereby forming heteromeric amyloid structures, which may explain its ability to inhibit necroptosis.
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Affiliation(s)
- Chi Ll Pham
- Discipline of Pharmacology, School of Medical Sciences, Faculty of Medicine and Health and Sydney Nano, University of Sydney, Sydney, NSW, Australia
| | - Nirukshan Shanmugam
- Discipline of Pharmacology, School of Medical Sciences, Faculty of Medicine and Health and Sydney Nano, University of Sydney, Sydney, NSW, Australia
| | - Merryn Strange
- Discipline of Pharmacology, School of Medical Sciences, Faculty of Medicine and Health and Sydney Nano, University of Sydney, Sydney, NSW, Australia
| | - Ailis O'Carroll
- EMBL Australia Node in Single Molecule Sciences, School of Medical Science, University of New South Wales, Sydney, NSW, Australia
| | - James Wp Brown
- EMBL Australia Node in Single Molecule Sciences, School of Medical Science, University of New South Wales, Sydney, NSW, Australia
| | - Emma Sierecki
- EMBL Australia Node in Single Molecule Sciences, School of Medical Science, University of New South Wales, Sydney, NSW, Australia
| | - Yann Gambin
- EMBL Australia Node in Single Molecule Sciences, School of Medical Science, University of New South Wales, Sydney, NSW, Australia
| | - Megan Steain
- Infectious Diseases and Immunology, Central Clinical School, Faculty of Medicine and Health, University of Sydney, Sydney, NSW, Australia
| | - Margaret Sunde
- Discipline of Pharmacology, School of Medical Sciences, Faculty of Medicine and Health and Sydney Nano, University of Sydney, Sydney, NSW, Australia
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McNamara DE, Quarato G, Guy CS, Green DR, Moldoveanu T. Characterization of MLKL-mediated Plasma Membrane Rupture in Necroptosis. J Vis Exp 2018. [PMID: 30148498 DOI: 10.3791/58088] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Necroptosis is a programmed cell death pathway triggered by activation of receptor interacting protein kinase 3 (RIPK3), which phosphorylates and activates the mixed lineage kinase-like domain pseudokinase, MLKL, to rupture or permeabilize the plasma membrane. Necroptosis is an inflammatory pathway associated with multiple pathologies including autoimmunity, infectious and cardiovascular diseases, stroke, neurodegeneration, and cancer. Here, we describe protocols that can be used to characterize MLKL as the executioner of plasma membrane rupture in necroptosis. We visualize the process of necroptosis in cells using live-cell imaging with conventional and confocal fluorescence microscopy, and in fixed cells using electron microscopy, which together revealed the redistribution of MLKL from the cytosol to the plasma membrane prior to induction of large holes in the plasma membrane. We present in vitro nuclear magnetic resonance (NMR) analysis using lipids to identify putative modulators of MLKL-mediated necroptosis. Based on this method, we identified quantitative lipid-binding preferences and phosphatidyl-inositol phosphates (PIPs) as critical binders of MLKL that are required for plasma membrane targeting and permeabilization in necroptosis.
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Affiliation(s)
- Dan E McNamara
- Department of Structural Biology, St. Jude Children's Research Hospital; Department of Chemical Biology and Therapeutics, St. Jude Children's Research Hospital
| | | | - Cliff S Guy
- Department of Immunology, St. Jude Children's Research Hospital
| | - Douglas R Green
- Department of Immunology, St. Jude Children's Research Hospital
| | - Tudor Moldoveanu
- Department of Structural Biology, St. Jude Children's Research Hospital; Department of Chemical Biology and Therapeutics, St. Jude Children's Research Hospital;
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45
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Wang GX, Tu HC, Dong Y, Skanderup AJ, Wang Y, Takeda S, Ganesan YT, Han S, Liu H, Hsieh JJ, Cheng EH. ΔNp63 Inhibits Oxidative Stress-Induced Cell Death, Including Ferroptosis, and Cooperates with the BCL-2 Family to Promote Clonogenic Survival. Cell Rep 2018; 21:2926-2939. [PMID: 29212036 DOI: 10.1016/j.celrep.2017.11.030] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2017] [Revised: 08/08/2017] [Accepted: 11/08/2017] [Indexed: 12/31/2022] Open
Abstract
The BCL-2 family proteins are central regulators of apoptosis. However, cells deficient for BAX and BAK or overexpressing BCL-2 still succumb to oxidative stress upon DNA damage or matrix detachment. Here, we show that ΔNp63α overexpression protects cells from oxidative stress induced by oxidants, DNA damage, anoikis, or ferroptosis-inducing agents. Conversely, ΔNp63α deficiency increases oxidative stress. Mechanistically, ΔNp63α orchestrates redox homeostasis through transcriptional control of glutathione biogenesis, utilization, and regeneration. Analysis of a lung squamous cell carcinoma dataset from The Cancer Genome Atlas (TCGA) reveals that TP63 amplification/overexpression upregulates the glutathione metabolism pathway in primary human tumors. Strikingly, overexpression of ΔNp63α promotes clonogenic survival of p53-/-Bax-/-Bak-/- cells against DNA damage. Furthermore, co-expression of BCL-2 and ΔNp63α confers clonogenic survival against matrix detachment, disrupts the luminal clearance of mammary acini, and promotes cancer metastasis. Our findings highlight the need for a simultaneous blockade of apoptosis and oxidative stress to promote long-term cellular well-being.
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Affiliation(s)
- Gary X Wang
- Human Oncology and Pathogenesis Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA; Division of Biology & Biomedical Sciences, Washington University, St. Louis, MO 63110, USA
| | - Ho-Chou Tu
- Human Oncology and Pathogenesis Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Yiyu Dong
- Human Oncology and Pathogenesis Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Anders Jacobsen Skanderup
- Genome Institute of Singapore, National University of Singapore, 60 Biopolis St., 138672 Singapore, Singapore
| | - Yufeng Wang
- Human Oncology and Pathogenesis Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Shugaku Takeda
- Human Oncology and Pathogenesis Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Yogesh Tengarai Ganesan
- Human Oncology and Pathogenesis Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Song Han
- Human Oncology and Pathogenesis Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Han Liu
- Human Oncology and Pathogenesis Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - James J Hsieh
- Molecular Oncology, Department of Medicine, Siteman Cancer Center, Washington University, St. Louis, MO 63110, USA
| | - Emily H Cheng
- Human Oncology and Pathogenesis Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA; Department of Pathology, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA; Department of Pathology and Laboratory Medicine, Weill Cornell Medical College, Cornell University, New York, NY 10065, USA.
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46
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Li B, Yang N, Li C, Li C, Gao K, Xie X, Dong X, Yang J, Yang Q, Tong Z, Lu G, Li W. INT-777, a bile acid receptor agonist, extenuates pancreatic acinar cells necrosis in a mouse model of acute pancreatitis. Biochem Biophys Res Commun 2018; 503:38-44. [PMID: 29859191 DOI: 10.1016/j.bbrc.2018.05.120] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2018] [Accepted: 05/16/2018] [Indexed: 02/07/2023]
Abstract
Bile acids receptor TGR5 and its agonist INT-777, which has been found to be involved in the NLRP3 inflammasome pathway, play an important role in inflammatory diseases. However, the role of INT-777 in acute pancreatitis (AP) has not been reported. In this present study, we found that TGR5 was expressed in pancreatic tissue and increased after AP onset induced by caerulein and further evaluated the impact of INT-777 on the severity of AP. The results showed that INT-777 could reduce the severity of AP in mice, which was manifested as decreased pancreatic tissue damage as well as the decrease of serum enzymes (amylase and lipase), pro-inflammatory cytokines (IL-1β, IL-6 and TNF-α) and the expression of necrosis related proteins (RIP3 and p-MLKL). Furthermore, we found that INT-777 reduced the reactive oxygen species (ROS) production in pancreatic acinar cells and inhibited the activation of NLRP3 inflammasome pathway. In conclusion, our data showed that INT-777 could protect pancreatic acinar cell against necrosis and reduce the severity of AP, which may be mediated by inhibiting ROS/NLRP3 inflammasome pathway.
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Affiliation(s)
- Baiqiang Li
- Surgical Intensive Care Unit (SICU), Department of General Surgery, Jinling Hospital, Medical School of Nanjing University, Nanjing, China
| | - Na Yang
- Surgical Intensive Care Unit (SICU), Department of General Surgery, Jinling Hospital, Medical School of Nanjing University, Nanjing, China
| | - Chuling Li
- Department of Respiratory Medicine, Jinling Clinical Medical College of Nanjing Medical University, Nanjing, China
| | - Chuwei Li
- College of Clinical Medicine Science, Chengdu Medical College, Chengdu, 610083, Sichuan, China
| | - Kun Gao
- Surgical Intensive Care Unit (SICU), Department of General Surgery, Jinling Clinical Medical College of Nanjing Medical University, Nanjing, China
| | - Xiaochun Xie
- Surgical Intensive Care Unit (SICU), Department of General Surgery, Jinling Clinical Medical College of Nanjing Medical University, Nanjing, China
| | - Xiaowu Dong
- Surgical Intensive Care Unit (SICU), Department of General Surgery, Jinling Clinical Medical College of Nanjing Medical University, Nanjing, China
| | - Jing Yang
- Surgical Intensive Care Unit (SICU), Department of General Surgery, Jinling Hospital, Medical School of Nanjing University, Nanjing, China
| | - Qi Yang
- Surgical Intensive Care Unit (SICU), Department of General Surgery, Jinling Hospital, Medical School of Nanjing University, Nanjing, China
| | - Zhihui Tong
- Surgical Intensive Care Unit (SICU), Department of General Surgery, Jinling Hospital, Medical School of Nanjing University, Nanjing, China
| | - Guotao Lu
- Surgical Intensive Care Unit (SICU), Department of General Surgery, Jinling Hospital, Medical School of Nanjing University, Nanjing, China; Department of Gastroenterology, The Affiliated Hospital of Yangzhou University, Yangzhou University, Yangzhou, China.
| | - Weiqin Li
- Surgical Intensive Care Unit (SICU), Department of General Surgery, Jinling Hospital, Medical School of Nanjing University, Nanjing, China.
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47
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RHIM-based protein:protein interactions in microbial defence against programmed cell death by necroptosis. Semin Cell Dev Biol 2018; 99:86-95. [PMID: 29738881 DOI: 10.1016/j.semcdb.2018.05.004] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2017] [Revised: 02/16/2018] [Accepted: 05/04/2018] [Indexed: 11/22/2022]
Abstract
The Receptor-interacting protein kinase Homotypic Interaction Motif (RHIM) is an amino acid sequence that mediates multiple protein:protein interactions in the mammalian programmed cell death pathway known as necroptosis. At least one key RHIM-based complex has been shown to have a functional amyloid fibril structure, which provides a stable hetero-oligomeric platform for downstream signaling. RHIMs and related motifs are present in immunity-related proteins across nature, from viruses to fungi to metazoans. Necroptosis is a hallmark feature of cellular clearance of infection. For this reason, numerous pathogens, including viruses and bacteria, have developed varied methods to modulate necroptosis, focusing on inhibiting RHIM:RHIM interactions, and thus their downstream cell death effects. This review will discuss current understanding of RHIM:RHIM interactions in normal cellular activation of necroptosis, from a structural and cell biology perspective. It will compare the mechanisms by which pathogens subvert these interactions in order to maintain their replicative and infective cycles and consider the similarities between RHIMs and other functional amyloid-forming proteins associated with cell death and innate immunity. It will discuss the implications of the heteromeric nature and structure of RHIM-based amyloid complexes in the context of other functional amyloids.
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48
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Li Y, Zhang Y, Gan Q, Xu M, Ding X, Tang G, Liang J, Liu K, Liu X, Wang X, Guo L, Gao Z, Hao X, Yang C. C. elegans-based screen identifies lysosome-damaging alkaloids that induce STAT3-dependent lysosomal cell death. Protein Cell 2018; 9:1013-1026. [PMID: 29611115 PMCID: PMC6251801 DOI: 10.1007/s13238-018-0520-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2017] [Accepted: 01/16/2018] [Indexed: 01/13/2023] Open
Abstract
Lysosomes are degradation and signaling centers within the cell, and their dysfunction impairs a wide variety of cellular processes. To understand the cellular effect of lysosome damage, we screened natural small-molecule compounds that induce lysosomal abnormality using Caenorhabditis elegans (C. elegans) as a model system. A group of vobasinyl-ibogan type bisindole alkaloids (ervachinines A-D) were identified that caused lysosome enlargement in C. elegans macrophage-like cells. Intriguingly, these compounds triggered cell death in the germ line independently of the canonical apoptosis pathway. In mammalian cells, ervachinines A-D induced lysosomal enlargement and damage, leading to leakage of cathepsin proteases, inhibition of autophagosome degradation and necrotic cell death. Further analysis revealed that this ervachinine-induced lysosome damage and lysosomal cell death depended on STAT3 signaling, but not RIP1 or RIP3 signaling. These findings suggest that lysosome-damaging compounds are promising reagents for dissecting signaling mechanisms underlying lysosome homeostasis and lysosome-related human disorders.
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Affiliation(s)
- Yang Li
- Department of Pharmacology, Key Laboratory of Metabolism and Molecular Medicine (The Ministry of Education), School of Basic Medical Science, Fudan University, Shanghai, 200032, China. .,State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, 100101, China.
| | - Yu Zhang
- State Key Laboratory of Phytochemistry and Plant Resources in Western China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650021, China
| | - Qiwen Gan
- State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, 100101, China
| | - Meng Xu
- State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, 100101, China
| | - Xiao Ding
- State Key Laboratory of Phytochemistry and Plant Resources in Western China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650021, China
| | - Guihua Tang
- State Key Laboratory of Phytochemistry and Plant Resources in Western China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650021, China
| | - Jingjing Liang
- State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, 100101, China
| | - Kai Liu
- State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, 100101, China
| | - Xuezhao Liu
- State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, 100101, China
| | - Xin Wang
- State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Center for Life Sciences, School of Life Sciences, Yunnan University, Kunming, 650091, China
| | - Lingli Guo
- State Key Laboratory of Phytochemistry and Plant Resources in Western China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650021, China
| | - Zhiyang Gao
- State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, 100101, China
| | - Xiaojiang Hao
- State Key Laboratory of Phytochemistry and Plant Resources in Western China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650021, China. .,The Key Laboratory of Chemistry for Natural Product of Guizhou Province, Chinese Academy of Science, Guiyang, 550002, China.
| | - Chonglin Yang
- State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, 100101, China. .,State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Center for Life Sciences, School of Life Sciences, Yunnan University, Kunming, 650091, China.
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Abstract
Necroptosis is a regulated form of necrotic cell death that is important in physiology and human diseases. However, the signaling process leading to eventual cell death in necroptosis remains unclear. We show that PUMA, a proapoptotic BH3-only Bcl-2 family member, is induced and plays a role in necroptotic death. PUMA induction enhances necroptotic signaling by promoting the release of mitochondrial DNA and activation of cytosolic DNA sensors. We provide genetic evidence for the functional role of PUMA in necroptosis-mediated developmental defects in mice. Our results demonstrate a previously unknown function of Bcl-2 family proteins and reveal a signal amplification mechanism mediated by PUMA and cytosolic DNA sensors that is involved in TNF-driven necroptosis in vitro and in vivo. Necroptosis, a form of regulated necrotic cell death, is governed by RIP1/RIP3-mediated activation of MLKL. However, the signaling process leading to necroptotic death remains to be elucidated. In this study, we found that PUMA, a proapoptotic BH3-only Bcl-2 family member, is transcriptionally activated in an RIP3/MLKL-dependent manner following induction of necroptosis. The induction of PUMA, which is mediated by autocrine TNF-α and enhanced NF-κB activity, contributes to necroptotic death in RIP3-expressing cells with caspases inhibited. On induction, PUMA promotes the cytosolic release of mitochondrial DNA and activation of the DNA sensors DAI/Zbp1 and STING, leading to enhanced RIP3 and MLKL phosphorylation in a positive feedback loop. Furthermore, deletion of PUMA partially rescues necroptosis-mediated developmental defects in FADD-deficient embryos. Collectively, our results reveal a signal amplification mechanism mediated by PUMA and cytosolic DNA sensors that is involved in TNF-driven necroptotic death in vitro and in vivo.
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50
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Zhu H, Sun A. Programmed necrosis in heart disease: Molecular mechanisms and clinical implications. J Mol Cell Cardiol 2018; 116:125-134. [DOI: 10.1016/j.yjmcc.2018.01.018] [Citation(s) in RCA: 66] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/17/2017] [Revised: 10/24/2017] [Accepted: 01/31/2018] [Indexed: 02/05/2023]
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