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Liang Q, Jing J, He H, Huang X, Liu J, Wang M, Qi Z, Zhang L, Huang Z, Yan Y, Liu S, Gao M, Zou Y. Manganese induces podocyte injury through regulating MTDH/ALKBH5/NLRP10 axis: Combined analysis at epidemiology and molecular biology levels. ENVIRONMENT INTERNATIONAL 2024; 187:108672. [PMID: 38648691 DOI: 10.1016/j.envint.2024.108672] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2023] [Revised: 03/01/2024] [Accepted: 04/16/2024] [Indexed: 04/25/2024]
Abstract
Manganese (Mn) is an essential micronutrient required for various biological processes but excess exposure to Mn can cause neurotoxicity. However, there are few reports regarding the toxicity effect of Mn on the kidney as well as the underlying molecule mechanism. Herein, in vivo experiments were adopted to assess the toxicity effects associated with Mn, and found that chronic Mn treatment induced the injury of glomerular podocytes but not renal tubule in rats. Genome-wide CRISPR/Cas9 knockout screen was then employed to explore the biotargets of the toxic effect of Mn on podocytes. Through functional analyses of the enriched candidate genes, NLRP10 was found to be significantly up-regulated and mediated Mn-induced podocyte apoptosis. Further mechanism investigation revealed that NLRP10 expression was regulated by demethylase AlkB homolog 5 (ALKBH5) in an m6A-dependent fashion upon Mn treatment. Moreover, Mn could directly bind to Metadherin (MTDH) and promoted its combination with ALKBH5 to promote NLRP10 expression and cell apoptosis. Finally, logistic regressions, restricted cubic spline regressions and uniform cubic B-spline were used to investigate the association between Mn exposure and the risk of chronic kidney disease (CKD). A U-shaped nonlinear relationship between CKD risk and plasma Mn level, and a positive linear relationship between CKD risk and urinary Mn levels was found in our case-control study. To sum up, our findings illustrated that m6A-dependent NLRP10 regulation is indispensable for podocyte apoptosis and nephrotoxicity induced by Mn, providing fresh insight into understanding the health risk of Mn and a novel target for preventing renal injury in Mn-intoxicated patients.
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Affiliation(s)
- Qiuju Liang
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; Department of Pharmacy, Xiangya Hospital, Central South University, Changsha 410008, Hunan, China
| | - Jiajun Jing
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; School of Public Health, Guangxi Medical University, Nanning 530021, China
| | - Huiming He
- School of Public Health, Guangxi Medical University, Nanning 530021, China; Institute of Parasitic Disease Control and Prevention, Guangxi Zhuang Autonomous Region Center for Disease Control and Prevention, Nanning 530021, China
| | - Xiaofeng Huang
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100085, China
| | - Jianing Liu
- School of Public Health, Guangxi Medical University, Nanning 530021, China
| | - Mingjun Wang
- Department of Nephrology, The First Affiliated Hospital of Guangxi Medical University, Nanning 530021, China
| | - Zijuan Qi
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; Shandong First Medical University & Shandong Academy of Medical Sciences, Ji'nan 250014, Shandong, China
| | - Li'e Zhang
- School of Public Health, Guangxi Medical University, Nanning 530021, China
| | - Ziang Huang
- Department of Mathematics, University of California at Davis, CA 95616, USA
| | - Yuanliang Yan
- Department of Pharmacy, Xiangya Hospital, Central South University, Changsha 410008, Hunan, China
| | - Sijin Liu
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100085, China
| | - Ming Gao
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100085, China.
| | - Yunfeng Zou
- School of Public Health, Guangxi Medical University, Nanning 530021, China.
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Xu Z, Kombe Kombe AJ, Deng S, Zhang H, Wu S, Ruan J, Zhou Y, Jin T. NLRP inflammasomes in health and disease. MOLECULAR BIOMEDICINE 2024; 5:14. [PMID: 38644450 PMCID: PMC11033252 DOI: 10.1186/s43556-024-00179-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2024] [Accepted: 03/20/2024] [Indexed: 04/23/2024] Open
Abstract
NLRP inflammasomes are a group of cytosolic multiprotein oligomer pattern recognition receptors (PRRs) involved in the recognition of pathogen-associated molecular patterns (PAMPs) and danger-associated molecular patterns (DAMPs) produced by infected cells. They regulate innate immunity by triggering a protective inflammatory response. However, despite their protective role, aberrant NLPR inflammasome activation and gain-of-function mutations in NLRP sensor proteins are involved in occurrence and enhancement of non-communicating autoimmune, auto-inflammatory, and neurodegenerative diseases. In the last few years, significant advances have been achieved in the understanding of the NLRP inflammasome physiological functions and their molecular mechanisms of activation, as well as therapeutics that target NLRP inflammasome activity in inflammatory diseases. Here, we provide the latest research progress on NLRP inflammasomes, including NLRP1, CARD8, NLRP3, NLRP6, NLRP7, NLRP2, NLRP9, NLRP10, and NLRP12 regarding their structural and assembling features, signaling transduction and molecular activation mechanisms. Importantly, we highlight the mechanisms associated with NLRP inflammasome dysregulation involved in numerous human auto-inflammatory, autoimmune, and neurodegenerative diseases. Overall, we summarize the latest discoveries in NLRP biology, their forming inflammasomes, and their role in health and diseases, and provide therapeutic strategies and perspectives for future studies about NLRP inflammasomes.
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Affiliation(s)
- Zhihao Xu
- Center of Disease Immunity and Intervention, College of Medicine, Lishui University, Lishui, 323000, China
| | - Arnaud John Kombe Kombe
- Laboratory of Structural Immunology, the CAS Key Laboratory of Innate Immunity and Chronic Disease, School of Basic Medical Sciences, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, 230027, China
| | - Shasha Deng
- Laboratory of Structural Immunology, the CAS Key Laboratory of Innate Immunity and Chronic Disease, School of Basic Medical Sciences, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, 230027, China
| | - Hongliang Zhang
- Center of Disease Immunity and Intervention, College of Medicine, Lishui University, Lishui, 323000, China
| | - Songquan Wu
- Center of Disease Immunity and Intervention, College of Medicine, Lishui University, Lishui, 323000, China
| | - Jianbin Ruan
- Department of Immunology, University of Connecticut Health Center, Farmington, 06030, USA.
| | - Ying Zhou
- Department of Obstetrics and Gynecology, Core Facility Center, Division of Life Sciences and Medicine, The First Affiliated Hospital of USTC, University of Science and Technology of China, Hefei, 230001, Anhui, China.
| | - Tengchuan Jin
- Center of Disease Immunity and Intervention, College of Medicine, Lishui University, Lishui, 323000, China.
- Laboratory of Structural Immunology, the CAS Key Laboratory of Innate Immunity and Chronic Disease, School of Basic Medical Sciences, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, 230027, China.
- Department of Obstetrics and Gynecology, Core Facility Center, Division of Life Sciences and Medicine, The First Affiliated Hospital of USTC, University of Science and Technology of China, Hefei, 230001, Anhui, China.
- Institute of Health and Medicine, Hefei Comprehensive National Science Center, Hefei, Anhui, China.
- Biomedical Sciences and Health Laboratory of Anhui Province, University of Science & Technology of China, Hefei, 230027, China.
- Clinical Research Hospital of Chinese Academy of Sciences (Hefei), University of Science and Technology of China, Hefei, 230001, China.
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3
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Yi X, Song Y, Xu J, Wang L, Liu L, Huang D, Zhang L. NLRP10 promotes AGEs-induced NLRP1 and NLRP3 inflammasome activation via ROS/MAPK/NF-κB signaling in human periodontal ligament cells. Odontology 2024; 112:100-111. [PMID: 37043073 DOI: 10.1007/s10266-023-00813-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2022] [Accepted: 04/03/2023] [Indexed: 04/13/2023]
Abstract
Diabetes mellitus (DM), characterized by production and accumulation of advanced glycation end products (AGEs), induces and promotes chronic inflammation in tissues, including periodontal tissue. Increasing amount of epidemiological and experimental evidence demonstrated that more extensive inflammatory reaction and bone resorption occurred in periodontal tissues in diabetic patients with periodontitis, which is speculated to be related to NLRP3 inflammasome. NLRP10 is the only NOD-like receptor protein lacking leucine-rich repeats, suggesting that NLRP10 may be a regulatory protein. The aim of this study was to investigate the regulatory role of NLRP10 on NLRP1 and NLRP3 inflammasome in human periodontal ligament cells (HPDLCs) under AGEs treatment. Expression of NLRP10 in HPDLCs stimulated with 100 ug/mL AGEs for 24 h was observed. Detection of TRIM31 is conducted, and in TRIM31-overexpressed HPDLCs, the interaction between NLRP10 with TRIM31 as well as NLRP10 with ubiquitination were explored by immunoprecipitation. Under AGEs stimulation, the activation of reactive oxidative stress (ROS) and inflammatory signaling pathway (NF-κB, MAPK pathway) was detected by biomedical microscope and western blot (WB), respectively. After stimulation with AGEs for 24 h with or without silencing NLRP10, inflammatory cytokines (IL-6 and IL-1β), NF-κB, MAPK pathway, ROS, and components of inflammasome were assessed. In HPDLCs, we found AGEs induced NLRP10 and inhibited TRIM31. TRIM31 overexpression significantly enhanced interaction between TRIM31 and NLRP10, then induced proteasomal degradation of NLRP10. Moreover, under AGEs stimulation, NLRP10 positively regulates NLRP1, NLRP3 inflammasomes by activating NF-κB, MAPK pathway, and increasing ROS, finally promoting the expression of inflammatory cytokines. Together, we, for the first time, confirmed that NLRP10 could promote inflammatory response induced by AGEs in HPDLCs via activation of NF-κB, and MAPK pathway and increasing ROS.
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Affiliation(s)
- Xiaowei Yi
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, 14# Third Section, Renmin Nan Road, Chengdu, 610041, China
| | - Yao Song
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, 14# Third Section, Renmin Nan Road, Chengdu, 610041, China
| | - Jialei Xu
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, 14# Third Section, Renmin Nan Road, Chengdu, 610041, China
| | - Liu Wang
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, 14# Third Section, Renmin Nan Road, Chengdu, 610041, China
| | - Liu Liu
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, 14# Third Section, Renmin Nan Road, Chengdu, 610041, China
| | - Dingming Huang
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, 14# Third Section, Renmin Nan Road, Chengdu, 610041, China
| | - Lan Zhang
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, 14# Third Section, Renmin Nan Road, Chengdu, 610041, China.
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4
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Masters SL. Ten things to know about NLRP10. Nat Immunol 2023; 24:561-562. [PMID: 36949288 DOI: 10.1038/s41590-023-01466-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/24/2023]
Affiliation(s)
- Seth L Masters
- Inflammation Division, The Walter and Eliza Hall Institute of Medical Research, Melbourne, Australia.
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A unique NLRC4 receptor from echinoderms mediates Vibrio phagocytosis via rearrangement of the cytoskeleton and polymerization of F-actin. PLoS Pathog 2021; 17:e1010145. [PMID: 34898657 PMCID: PMC8699970 DOI: 10.1371/journal.ppat.1010145] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Revised: 12/23/2021] [Accepted: 11/27/2021] [Indexed: 11/20/2022] Open
Abstract
Many members of the nucleotide-binding and oligomerization domain (NACHT)- and leucine-rich-repeat-containing protein (NLR) family play crucial roles in pathogen recognition and innate immune response regulation. In our previous work, a unique and Vibrio splendidus-inducible NLRC4 receptor comprising Ig and NACHT domains was identified from the sea cucumber Apostichopus japonicus, and this receptor lacked the CARD and LRR domains that are typical of common cytoplasmic NLRs. To better understand the functional role of AjNLRC4, we confirmed that AjNLRC4 was a bona fide membrane PRR with two transmembrane structures. AjNLRC4 was able to directly bind microbes and polysaccharides via its extracellular Ig domain and agglutinate a variety of microbes in a Ca2+-dependent manner. Knockdown of AjNLRC4 by RNA interference and blockade of AjNLRC4 by antibodies in coelomocytes both could significantly inhibit the phagocytic activity and elimination of V. splendidus. Conversely, overexpression of AjNLRC4 enhanced the phagocytic activity of V. splendidus, and this effect could be specifically blocked by treatment with the actin-mediated endocytosis inhibitor cytochalasin D but not other endocytosis inhibitors. Moreover, AjNLRC4-mediated phagocytic activity was dependent on the interaction between the intracellular domain of AjNLRC4 and the β-actin protein and further regulated the Arp2/3 complex to mediate the rearrangement of the cytoskeleton and the polymerization of F-actin. V. splendidus was found to be colocalized with lysosomes in coelomocytes, and the bacterial quantities were increased after injection of chloroquine, a lysosome inhibitor. Collectively, these results suggested that AjNLRC4 served as a novel membrane PRR in mediating coelomocyte phagocytosis and further clearing intracellular Vibrio through the AjNLRC4-β-actin-Arp2/3 complex-lysosome pathway. Vibrio splendidus is ubiquitously present in marine environments and in or on many aquaculture species and is considered to be an important opportunistic pathogen that has caused serious economic losses to the aquaculture industry worldwide. Phagocytosis is the first step of pathogen clearance and is triggered by specific interactions between host pattern recognition receptors (PRRs) and pathogen-associated molecular patterns (PAMPs) from invasive bacteria. However, the mechanism that underlies receptor-mediated V. splendidus phagocytosis is poorly understood. In this study, an atypical AjNLRC4 receptor without LRR and CARD domains was found to serve as the membrane receptor for V. splendidus, not the common cytoplasmic NLRs. The Ig domain of AjNLRC4 is replaced with a conventional LRR domain to bind V. splendidus, and the intracellular domain of AjNLRC4 specifically interacts with β-actin to mediate V. splendidus endocytosis in an actin-dependent manner. Endocytic V. splendidus is ultimately degraded in phagolysosomes. Our findings will contribute to the development of novel strategies for treating V. splendidus infection by modulating the actin-dependent endocytosis pathway.
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Babamale AO, Chen ST. Nod-like Receptors: Critical Intracellular Sensors for Host Protection and Cell Death in Microbial and Parasitic Infections. Int J Mol Sci 2021; 22:11398. [PMID: 34768828 PMCID: PMC8584118 DOI: 10.3390/ijms222111398] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2021] [Revised: 10/04/2021] [Accepted: 10/19/2021] [Indexed: 12/14/2022] Open
Abstract
Cell death is an essential immunological apparatus of host defense, but dysregulation of mutually inclusive cell deaths poses severe threats during microbial and parasitic infections leading to deleterious consequences in the pathological progression of infectious diseases. Nucleotide-binding oligomerization domain (NOD)-Leucine-rich repeats (LRR)-containing receptors (NLRs), also called nucleotide-binding oligomerization (NOD)-like receptors (NLRs), are major cytosolic pattern recognition receptors (PRRs), their involvement in the orchestration of innate immunity and host defense against bacteria, viruses, fungi and parasites, often results in the cleavage of gasdermin and the release of IL-1β and IL-18, should be tightly regulated. NLRs are functionally diverse and tissue-specific PRRs expressed by both immune and non-immune cells. Beyond the inflammasome activation, NLRs are also involved in NF-κB and MAPK activation signaling, the regulation of type I IFN (IFN-I) production and the inflammatory cell death during microbial infections. Recent advancements of NLRs biology revealed its possible interplay with pyroptotic cell death and inflammatory mediators, such as caspase 1, caspase 11, IFN-I and GSDMD. This review provides the most updated information that caspase 8 skews the NLRP3 inflammasome activation in PANoptosis during pathogen infection. We also update multidimensional roles of NLRP12 in regulating innate immunity in a content-dependent manner: novel interference of NLRP12 on TLRs and NOD derived-signaling cascade, and the recently unveiled regulatory property of NLRP12 in production of type I IFN. Future prospects of exploring NLRs in controlling cell death during parasitic and microbial infection were highlighted.
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Affiliation(s)
- Abdulkareem Olarewaju Babamale
- Taiwan International Graduate Program in Molecular Medicine, National Yang-Ming Chiao Tung University and Academia Sinica, Taipei 11266, Taiwan;
- Parasitology Unit, Faculty of Life Sciences, University of Ilorin, Ilorin 240003, Nigeria
| | - Szu-Ting Chen
- Taiwan International Graduate Program in Molecular Medicine, National Yang-Ming Chiao Tung University and Academia Sinica, Taipei 11266, Taiwan;
- Institute of Clinical Medicine, National Yang-Ming Chiao Tung University, Taipei 11266, Taiwan
- Cancer Progression Research Center, National Yang-Ming Chiao Tung University, Taipei 11266, Taiwan
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7
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Chen K, Lv Z, Shao Y, Guo M, Li C. Cloning and functional analysis the first NLRC4-like gene from the sea cucumber Apostichopus japonicus. DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 2020; 104:103541. [PMID: 31733219 DOI: 10.1016/j.dci.2019.103541] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2019] [Revised: 11/10/2019] [Accepted: 11/11/2019] [Indexed: 06/10/2023]
Abstract
The NOD-like receptor family member 4 (NLRC4) plays a crucial role in regulating the innate immune responses and cell apoptosis pathways in vertebrates. However, the function of the NLRC4 counterpart in invertebrates remains elusive. In this study, the first NLRC4-like gene was cloned and characterized from Apostichopus japonicus (designated as AjNLRC4-like) with RACE technology. The full-length cDNA of the AjNLRC4-like gene was 4065 bp, which consisted of a 5'-untranslated region (UTR) of 387 bp, a 3'-UTR of 159 bp, and a complete open reading frame of 3519 bp encoding a polypeptide of 1172 amino acid residues. Structural analysis revealed that AjNLRC4-like protein contained two IG domains (31-132 and 251-353 amino acids), a common NACHT (600-757 amino acids), and no LRR and CARD domains compared with the vertebrate NLRC4. Spatial expression analysis revealed that the AjNLRC4-like was ubiquitously expressed in all the examined tissues with larger magnitude in the intestine. The mRNA expression of the AjNLRC4-like was significantly upregulated by 2.86- and 2.92-fold at 24 h after the Vibrio splendidus challenge in vivo and the lipopolysaccharide (LPS) treatment in vitro, respectively, compared with that of the control group. The purified recombinant AjNLRC4-NACHT protein displayed higher binding activities to various pathogen-associated molecular patterns (PAMPs), including LPS, peptidoglycan, and mannan. Further functional analysis indicated that the apoptosis of coelomocytes was significantly inhibited by 11.37% after specific AjNLRC4-like siRNA treatment, and the inflammatory caspase Ajcaspase-1 was synchronously decreased by 0.28-fold in the same condition. Collectively, these results supported that the uncanonical AjNLRC4-like protein may share similar functions to the vertebrate NLRC4 as the pattern recognition receptor and in mediating coelomocyte apoptosis in the pathogen-challenged sea cucumber.
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Affiliation(s)
- Kaiyu Chen
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Ningbo University, Ningbo, 315211, PR China
| | - Zhimeng Lv
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Ningbo University, Ningbo, 315211, PR China
| | - Yina Shao
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Ningbo University, Ningbo, 315211, PR China
| | - Ming Guo
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Ningbo University, Ningbo, 315211, PR China
| | - Chenghua Li
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Ningbo University, Ningbo, 315211, PR China; Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266071, PR China.
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8
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Heat Shock Proteins and Inflammasomes. Int J Mol Sci 2019; 20:ijms20184508. [PMID: 31547225 PMCID: PMC6771073 DOI: 10.3390/ijms20184508] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2019] [Revised: 09/09/2019] [Accepted: 09/10/2019] [Indexed: 01/23/2023] Open
Abstract
Heat shock proteins (HSP) regulate inflammation in many physiological contexts. However, inflammation is a broad process, involving numerous cytokines produced by different molecular pathways with multiple functions. In this review, we focused on the particular role of HSP on the inflammasomes intracellular platforms activated by danger signals and that enable activation of inflammatory caspases, mainly caspase-1, leading to the production of the pro-inflammatory cytokine IL-1β. Interestingly, some members of the HSP family favor inflammasomes activation whereas others inhibit it, suggesting that HSP modulators for therapeutic purposes, must be carefully chosen.
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9
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Wang T, Yan B, Lou L, Lin X, Yu T, Wu S, Lu Q, Liu W, Huang Z, Zhang M, Zhang W, Wen Z. Nlrc3-like is required for microglia maintenance in zebrafish. J Genet Genomics 2019; 46:291-299. [PMID: 31278008 DOI: 10.1016/j.jgg.2019.06.002] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2018] [Revised: 06/17/2019] [Accepted: 06/17/2019] [Indexed: 01/06/2023]
Abstract
Microglia are tissue-resident macrophages residing in the central nervous system (CNS) and play critical roles in removing cellular debris and infectious agents as well as regulating neurogenesis and neuronal activities. Yet, the molecular basis underlying the establishment of microglia pool and the maintenance of their homeostasis in the CNS remain largely undefined. Here we report the identification and characterization of a mutant zebrafish, which harbors a point mutation in the nucleotide-binding oligomerization domain (NOD) like receptor gene nlrc3-like, resulting in the loss of microglia in a temperature sensitive manner. Temperature shift assay reveals that the late onset of nlrc3-like deficiency leads to excessive microglia cell death. Further analysis shows that the excessive microglia death in nlrc3-like deficient mutants is attributed, at least in part, to aberrant activation of canonical inflammasome pathway. Our study indicates that proper regulation of inflammasome cascade is critical for the maintenance of microglia homeostasis.
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Affiliation(s)
- Tienan Wang
- Division of Life Science and State Key Laboratory of Molecular Neuroscience, Center of Systems Biology and Human Health, The Hong Kong University of Science and Technology, Clearwater Bay, Kowloon, Hong Kong, China; Division of Life Science, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China
| | - Bo Yan
- Shanghai Public Health Clinical Center, Fudan University, Shanghai, 201508, China; Division of Life Science, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China.
| | - Liang Lou
- Division of Life Science and State Key Laboratory of Molecular Neuroscience, Center of Systems Biology and Human Health, The Hong Kong University of Science and Technology, Clearwater Bay, Kowloon, Hong Kong, China
| | - Xi Lin
- Division of Life Science and State Key Laboratory of Molecular Neuroscience, Center of Systems Biology and Human Health, The Hong Kong University of Science and Technology, Clearwater Bay, Kowloon, Hong Kong, China
| | - Tao Yu
- Division of Life Science and State Key Laboratory of Molecular Neuroscience, Center of Systems Biology and Human Health, The Hong Kong University of Science and Technology, Clearwater Bay, Kowloon, Hong Kong, China
| | - Shuting Wu
- Division of Life Science and State Key Laboratory of Molecular Neuroscience, Center of Systems Biology and Human Health, The Hong Kong University of Science and Technology, Clearwater Bay, Kowloon, Hong Kong, China
| | - Qing Lu
- Bio-X Institutes, Key Laboratory for the Genetics of Developmental and Neuropsychiatric Disorders, Ministry of Education, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Wei Liu
- Department of Developmental Biology, School of Basic Medical Sciences, South China University of Technology, Guangzhou, 510630, China
| | - Zhibin Huang
- Department of Developmental Biology, School of Basic Medical Sciences, South China University of Technology, Guangzhou, 510630, China
| | - Mingjie Zhang
- Division of Life Science and State Key Laboratory of Molecular Neuroscience, Center of Systems Biology and Human Health, The Hong Kong University of Science and Technology, Clearwater Bay, Kowloon, Hong Kong, China
| | - Wenqing Zhang
- Department of Developmental Biology, School of Basic Medical Sciences, South China University of Technology, Guangzhou, 510630, China.
| | - Zilong Wen
- Division of Life Science and State Key Laboratory of Molecular Neuroscience, Center of Systems Biology and Human Health, The Hong Kong University of Science and Technology, Clearwater Bay, Kowloon, Hong Kong, China.
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10
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Levenson EA, Martens C, Kanakabandi K, Turner CV, Virtaneva K, Paneru M, Ricklefs S, Sosnovtsev SV, Johnson JA, Porcella SF, Green KY. Comparative Transcriptomic Response of Primary and Immortalized Macrophages to Murine Norovirus Infection. THE JOURNAL OF IMMUNOLOGY 2018; 200:4157-4169. [PMID: 29735480 DOI: 10.4049/jimmunol.1700384] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2017] [Accepted: 04/16/2018] [Indexed: 01/10/2023]
Abstract
Murine norovirus (NoV) is genetically similar to human NoV and offers both an efficient in vitro cell culture system and an animal model by which to investigate the molecular basis of replication. In this study, we present a detailed global view of host alterations to cellular pathways that occur during the progression of a NoV infection. This was accomplished for both Mus musculus BALB/c-derived RAW264.7 (RAW) cells, an immortalized cell line widely used in in vitro replication studies, and primary bone marrow-derived macrophages (BMDM), representing a permissive in vivo target cell in the host. Murine NoV replicated in both cell types, although detected genome copies were approximately one log lower in BMDM compared with RAW cells. RAW and BMDM cells shared an IRF3/7-based IFN response that occurred early in infection. In RAW cells, transcriptional upregulation and INF-β expression were not coupled in that a significant delay in the detection of secreted INF-β was observed. In contrast, primary BMDM showed an early upregulation of transcripts and immediate release of INF-β that might account for lower virus yield. Differences in the transcriptional pathway responses included a marked decrease in expression of key genes in the cell cycle and lipid pathways in RAW cells compared with that of BMDM. Our comparative analysis indicates the existence of varying host responses to virus infection in populations of permissive cells. Awareness of these differences at the gene level will be important in the application of a given permissive culture system to the study of NoV immunity, pathogenesis, and drug development.
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Affiliation(s)
- Eric A Levenson
- Caliciviruses Section, Laboratory of Infectious Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892; and
| | - Craig Martens
- Rocky Mountain Laboratories Genomics Unit, Research Technologies Section, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Hamilton, MT 59840
| | - Kishore Kanakabandi
- Rocky Mountain Laboratories Genomics Unit, Research Technologies Section, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Hamilton, MT 59840
| | - Charles V Turner
- Rocky Mountain Laboratories Genomics Unit, Research Technologies Section, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Hamilton, MT 59840
| | - Kimmo Virtaneva
- Rocky Mountain Laboratories Genomics Unit, Research Technologies Section, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Hamilton, MT 59840
| | - Monica Paneru
- Rocky Mountain Laboratories Genomics Unit, Research Technologies Section, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Hamilton, MT 59840
| | - Stacy Ricklefs
- Rocky Mountain Laboratories Genomics Unit, Research Technologies Section, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Hamilton, MT 59840
| | - Stanislav V Sosnovtsev
- Caliciviruses Section, Laboratory of Infectious Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892; and
| | - Jordan A Johnson
- Caliciviruses Section, Laboratory of Infectious Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892; and
| | - Stephen F Porcella
- Rocky Mountain Laboratories Genomics Unit, Research Technologies Section, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Hamilton, MT 59840
| | - Kim Y Green
- Caliciviruses Section, Laboratory of Infectious Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892; and
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11
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NOD-like receptor(s) and host immune responses with Pseudomonas aeruginosa infection. Inflamm Res 2018; 67:479-493. [PMID: 29353310 DOI: 10.1007/s00011-018-1132-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2017] [Revised: 01/12/2018] [Accepted: 01/16/2018] [Indexed: 01/01/2023] Open
Abstract
INTRODUCTION Molecular mechanisms underlying the interactions between Pseudomonas aeruginosa, the common opportunistic pathogen in cystic fibrosis individuals, and host induce a number of marked inflammatory responses and associate with complex therapeutic problems due to bacterial resistance to antibiotics in chronic stage of infection. METHODS Pseudomonas aeruginosa is recognized by number of pattern recognition receptors (PRRs); NOD-like receptors (NLRs) are a class of PRRs, which can recognize a variety of endogenous and exogenous ligands, thereby playing a critical role in innate immunity. RESULTS NLR activation initiates forming of a multi-protein complex called inflammasome that induces activation of caspase-1 and resulted in cleavage of pro-inflammatory cytokines interleukin (IL)-1β and IL-18. When the IL-1β is secreted excessively, this causes tissue damage and extensive inflammatory responses that are potentially hazardous for the host. CONCLUSIONS Recent evidence has laid out inflammasome-forming NLR far beyond inflammation. This review summarizes current knowledge regarding the various roles played by different NLRs and associated down-signals, either in recognition of P. aeruginosa or may be associated with such bacterial pathogen infection, which may relate to for the complexity of lung diseases caused by P. aeruginosa.
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12
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Dolasia K, Bisht MK, Pradhan G, Udgata A, Mukhopadhyay S. TLRs/NLRs: Shaping the landscape of host immunity. Int Rev Immunol 2017; 37:3-19. [PMID: 29193992 DOI: 10.1080/08830185.2017.1397656] [Citation(s) in RCA: 82] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Innate immune system provides the first line of defense against pathogenic organisms. It has a varied and large collection of molecules known as pattern recognition receptors (PRRs) which can tackle the pathogens promptly and effectively. Toll-like receptors (TLRs) and NOD-like receptors (NLRs) are members of the PRR family that recognize pathogen associated molecular patterns (PAMPs) and play pivotal roles to mediate defense against infections from bacteria, fungi, virus and various other pathogens. In this review, we discuss the critical roles of TLRs and NLRs in the regulation of host immune-effector functions such as cytokine production, phagosome-lysosome fusion, inflammasome activation, autophagy, antigen presentation, and B and T cell immune responses that are known to be essential for mounting a protective immune response against the pathogens. This review may be helpful to design TLRs/NLRs based immunotherapeutics to control various infections and pathophysiological disorders.
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Affiliation(s)
- Komal Dolasia
- a Laboratory of Molecular Cell Biology, Centre for DNA Fingerprinting and Diagnostics (CDFD) , Tuljaguda Complex, Nampally, Hyderabad , India
| | - Manoj K Bisht
- a Laboratory of Molecular Cell Biology, Centre for DNA Fingerprinting and Diagnostics (CDFD) , Tuljaguda Complex, Nampally, Hyderabad , India
| | - Gourango Pradhan
- a Laboratory of Molecular Cell Biology, Centre for DNA Fingerprinting and Diagnostics (CDFD) , Tuljaguda Complex, Nampally, Hyderabad , India
| | - Atul Udgata
- a Laboratory of Molecular Cell Biology, Centre for DNA Fingerprinting and Diagnostics (CDFD) , Tuljaguda Complex, Nampally, Hyderabad , India
| | - Sangita Mukhopadhyay
- a Laboratory of Molecular Cell Biology, Centre for DNA Fingerprinting and Diagnostics (CDFD) , Tuljaguda Complex, Nampally, Hyderabad , India
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13
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Nozawa T, Aikawa C, Minowa-Nozawa A, Nakagawa I. The intracellular microbial sensor NLRP4 directs Rho-actin signaling to facilitate Group A Streptococcus-containing autophagosome-like vacuole formation. Autophagy 2017; 13:1841-1854. [PMID: 29099277 PMCID: PMC5788493 DOI: 10.1080/15548627.2017.1358343] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2016] [Revised: 06/30/2017] [Accepted: 07/18/2017] [Indexed: 12/19/2022] Open
Abstract
Xenophagy, also known as antibacterial autophagy, functions as a crucial defense system that can utilize intracellular pattern recognition sensors, such as NLRP4, to recognize and selectively eliminate bacterial pathogens. However, little is known about how NLRP4 regulates xenophagy. Here, we report that NLRP4 binds ARHGDIA (Rho GDP dissociation inhibitor α) to regulate Rho GTPase signaling and facilitate actin-mediated xenophagy. Specifically, NLRP4 is recruited to Group A Streptococcus (GAS) and colocalizes with GAS-containing autophagosome-like vacuoles (GcAVs), where it regulates ARHGDIA-Rho GTPase recruitment to promote autophagosome formation. The interaction between NLRP4, ARHGDIA, and Rho GTPases is regulated by ARHGDIA Tyr156 phosphorylation, which acts as a gate to induce Rho-mediated xenophagy. Moreover, ARHGDIA and Rho GTPase are involved in actin-mediated ATG9A recruitment to phagophores, facilitating elongation to form autophagosomes. Collectively, these findings demonstrate that NLRP4 functions as a Rho receptor complex to direct actin dynamics regulating xenophagy.
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Affiliation(s)
- Takashi Nozawa
- Department of Microbiology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Chihiro Aikawa
- Department of Microbiology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Atsuko Minowa-Nozawa
- Department of Microbiology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Ichiro Nakagawa
- Department of Microbiology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
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14
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Lee SJ, Choi BK. Involvement of NLRP10 in IL-1α induction of oral epithelial cells by periodontal pathogens. Innate Immun 2017; 23:569-577. [PMID: 28766990 DOI: 10.1177/1753425917722610] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
This study investigated the pathogenesis of periodontitis and the role of nucleotide-binding oligomerization domain-like receptor protein 10 (NLRP10). The human oral epithelial cell line HOK-16B was infected with two periodontal pathogens, Tannerella forsythia and Fusobacterium nucleatum, at various MOIs. RT-PCR and immunoblotting demonstrated that infection increased mRNA and protein expression of NLRP10, respectively. The siRNA-mediated NLRP10 knockdown significantly reduced IL-1α expression and secretion. Both bacteria induced phosphorylation of ERK, JNK and p38 MAP kinases in HOK-16B cells. NLRP10 knockdown impaired ERK phosphorylation only. ERK inhibition significantly decreased the expression of T. forsythia- and F. nucleatum-induced IL-1α. Our data suggest that NLRP10 is involved in activating the ERK signalling pathway in HOK-16B cells infected with T. forsythia and F. nucleatum. This pathway likely augments the pro-inflammatory cytokine IL-1α levels, which may play a critical role in periodontitis.
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Affiliation(s)
- Seok-Joo Lee
- 1 Department of Oral Microbiology and Immunology, School of Dentistry, Seoul National University, Seoul, Korea
| | - Bong-Kyu Choi
- 1 Department of Oral Microbiology and Immunology, School of Dentistry, Seoul National University, Seoul, Korea
- 2 Dental Research Institute, Seoul National University, Seoul, Korea
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15
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Liang Y, Chang C, Lu Q. The Genetics and Epigenetics of Atopic Dermatitis-Filaggrin and Other Polymorphisms. Clin Rev Allergy Immunol 2017; 51:315-328. [PMID: 26385242 DOI: 10.1007/s12016-015-8508-5] [Citation(s) in RCA: 84] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Atopic dermatitis (AD) is a chronic inflammatory skin disease caused by a combination of genetic and environmental factors. Genetic evidences depict a complex network comprising by epidermal barrier dysfunctions and dysregulation of innate and adaptive immunity in the pathogenesis of AD. Mutations in the human filaggrin gene (FLG) are the most significant and well-replicated genetic mutation associated with AD, and other mutations associated with epidermal barriers such as SPINK5, FLG-2, SPRR3, and CLDN1 have all been linked to AD. Gene variants may also contribute to the abnormal innate and adaptive responses found in AD, including mutations in PRRs and AMPs, TSLP and TSLPR, IL-1 family cytokines and receptors genes, vitamin D pathway genes, FCER1A, and Th2 and other cytokines genes. GWAS and Immunochip analysis have identified a total of 19 susceptibility loci for AD. Candidate genes at these susceptibility loci identified by GWAS and Immunochip analysis also suggest roles for epidermal barrier functions, innate and adaptive immunity, interleukin-1 family signaling, regulatory T cells, the vitamin D pathway, and the nerve growth factor pathway in the pathogenesis of AD. Increasing evidences show the modern lifestyle (i.e., the hygiene hypothesis, Western diet) and other environmental factors such as pollution and environmental tobacco smoke (ETS) lead to the increasing prevalence of AD with the development of industrialization. Epigenetic alterations in response to these environmental factors, including DNA methylation and microRNA related to immune system and skin barriers, have been found to contribute to the pathogenesis of AD. Genetic variants and epigenetic alteration might be the key tools for the molecular taxonomy of AD and provide the background for the personalized management.
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Affiliation(s)
- Yunsheng Liang
- Hunan Key Laboratory of Medical Epigenomics & Department of Dermatology, The Second Xiangya Hospital, Central South University, 139 Renmin Middle Rd, Changsha, Hunan, 410011, China
| | - Christopher Chang
- Division of Rheumatology, Allergy and Clinical Immunology, University of California at Davis, Davis, CA, 95616, USA
| | - Qianjin Lu
- Hunan Key Laboratory of Medical Epigenomics & Department of Dermatology, The Second Xiangya Hospital, Central South University, 139 Renmin Middle Rd, Changsha, Hunan, 410011, China.
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16
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Tervaniemi MH, Katayama S, Skoog T, Siitonen HA, Vuola J, Nuutila K, Sormunen R, Johnsson A, Linnarsson S, Suomela S, Kankuri E, Kere J, Elomaa O. NOD-like receptor signaling and inflammasome-related pathways are highlighted in psoriatic epidermis. Sci Rep 2016; 6:22745. [PMID: 26976200 PMCID: PMC4792137 DOI: 10.1038/srep22745] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2015] [Accepted: 02/19/2016] [Indexed: 02/08/2023] Open
Abstract
Psoriatic skin differs distinctly from normal skin by its thickened epidermis. Most gene expression comparisons utilize full-thickness biopsies, with substantial amount of dermis. We assayed the transcriptomes of normal, lesional, and non-lesional psoriatic epidermis, sampled as split-thickness skin grafts, with 5′-end RNA sequencing. We found that psoriatic epidermis contains more mRNA per total RNA than controls, and took this into account in the bioinformatic analysis. The approach highlighted innate immunity-related pathways in psoriasis, including NOD-like receptor (NLR) signaling and inflammasome activation. We demonstrated that the NLR signaling genes NOD2, PYCARD, CARD6, and IFI16 are upregulated in psoriatic epidermis, and strengthened these findings by protein expression. Interestingly, PYCARD, the key component of the inflammasome, showed an altered expression pattern in the lesional epidermis. The profiling of non-lesional skin highlighted PSORS4 and mitochondrially encoded transcripts, suggesting that their gene expression is altered already before the development of lesions. Our data suggest that all components needed for the active inflammasome are present in the keratinocytes of psoriatic skin. The characterization of inflammasome pathways provides further opportunities for therapy. Complementing previous transcriptome studies, our approach gives deeper insight into the gene regulation in psoriatic epidermis.
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Affiliation(s)
- Mari H Tervaniemi
- Folkhälsan Institute of Genetics, Helsinki, Finland.,Department of Medical and Clinical Genetics, Medicum and Research Programs Unit, Molecular Neurology, University of Helsinki, Helsinki, Finland
| | - Shintaro Katayama
- Department of Biosciences and Nutrition, Karolinska Institutet, Huddinge, Sweden.,Science for Life Laboratory, Solna, Sweden
| | - Tiina Skoog
- Department of Biosciences and Nutrition, Karolinska Institutet, Huddinge, Sweden
| | - H Annika Siitonen
- Folkhälsan Institute of Genetics, Helsinki, Finland.,Department of Medical and Clinical Genetics, Medicum and Research Programs Unit, Molecular Neurology, University of Helsinki, Helsinki, Finland
| | - Jyrki Vuola
- Helsinki Burn Center, Department of Plastic Surgery, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Kristo Nuutila
- Department of Pharmacology, Medicum, University of Helsinki, Helsinki, Finland
| | - Raija Sormunen
- Biocenter Oulu, Department of Pathology, University of Oulu, Oulu, Finland
| | - Anna Johnsson
- Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm, Sweden
| | - Sten Linnarsson
- Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm, Sweden
| | - Sari Suomela
- Department of Dermatology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Esko Kankuri
- Department of Pharmacology, Medicum, University of Helsinki, Helsinki, Finland
| | - Juha Kere
- Folkhälsan Institute of Genetics, Helsinki, Finland.,Department of Medical and Clinical Genetics, Medicum and Research Programs Unit, Molecular Neurology, University of Helsinki, Helsinki, Finland.,Department of Biosciences and Nutrition, Karolinska Institutet, Huddinge, Sweden.,Science for Life Laboratory, Solna, Sweden
| | - Outi Elomaa
- Folkhälsan Institute of Genetics, Helsinki, Finland.,Department of Medical and Clinical Genetics, Medicum and Research Programs Unit, Molecular Neurology, University of Helsinki, Helsinki, Finland
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17
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Sueldo DJ, Shimels M, Spiridon LN, Caldararu O, Petrescu AJ, Joosten MHAJ, Tameling WIL. Random mutagenesis of the nucleotide-binding domain of NRC1 (NB-LRR Required for Hypersensitive Response-Associated Cell Death-1), a downstream signalling nucleotide-binding, leucine-rich repeat (NB-LRR) protein, identifies gain-of-function mutations in the nucleotide-binding pocket. THE NEW PHYTOLOGIST 2015; 208:210-23. [PMID: 26009937 DOI: 10.1111/nph.13459] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2014] [Accepted: 03/25/2015] [Indexed: 05/26/2023]
Abstract
Plant nucleotide-binding, leucine-rich repeat (NB-LRR) proteins confer immunity to pathogens possessing the corresponding avirulence proteins. Activation of NB-LRR proteins is often associated with induction of the hypersensitive response (HR), a form of programmed cell death. NRC1 (NB-LRR Required for HR-Associated Cell Death-1) is a tomato (Solanum lycopersicum) NB-LRR protein that participates in the signalling cascade leading to resistance to the pathogens Cladosporium fulvum and Verticillium dahliae. To identify mutations in NRC1 that cause increased signalling activity, we generated a random library of NRC1 variants mutated in their nucleotide-binding domain and screened them for the ability to induce an elicitor-independent HR in Nicotiana tabacum. Screening of 1920 clones retrieved 11 gain-of-function mutants, with 10 of them caused by a single amino acid substitution. All substitutions are located in or very close to highly conserved motifs within the nucleotide-binding domain, suggesting modulation of the signalling activity of NRC1. Three-dimensional modelling of the nucleotide-binding domain of NRC1 revealed that the targeted residues are centred around the bound nucleotide. Our mutational approach has generated a wide set of novel gain-of-function mutations in NRC1 and provides insight into how the activity of this NB-LRR is regulated.
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Affiliation(s)
- Daniela J Sueldo
- Laboratory of Phytopathology, Wageningen University, Droevendaalsesteeg 1, 6708 PB, Wageningen, the Netherlands
| | - Mahdere Shimels
- Laboratory of Phytopathology, Wageningen University, Droevendaalsesteeg 1, 6708 PB, Wageningen, the Netherlands
| | - Laurentiu N Spiridon
- Department of Bioinformatics and Structural Biochemistry, Institute of Biochemistry of the Romanian Academy, Splaiul Independentei 296, 060036, Bucharest, Romania
| | - Octav Caldararu
- Department of Bioinformatics and Structural Biochemistry, Institute of Biochemistry of the Romanian Academy, Splaiul Independentei 296, 060036, Bucharest, Romania
| | - Andrei-Jose Petrescu
- Department of Bioinformatics and Structural Biochemistry, Institute of Biochemistry of the Romanian Academy, Splaiul Independentei 296, 060036, Bucharest, Romania
| | - Matthieu H A J Joosten
- Laboratory of Phytopathology, Wageningen University, Droevendaalsesteeg 1, 6708 PB, Wageningen, the Netherlands
| | - Wladimir I L Tameling
- Laboratory of Phytopathology, Wageningen University, Droevendaalsesteeg 1, 6708 PB, Wageningen, the Netherlands
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18
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Gómez López M, Domínguez López A, Abarca Rojano E, Rojas Hernández S, Martínez Godínez MDLA, Miliar García A, Campos Rodríguez R. 17β-Estradiol transcriptionally modulates Nlrp1 and Nlrp3 inflammasomes in gonadectomized rats with inflammation. Immunopharmacol Immunotoxicol 2015; 37:343-50. [DOI: 10.3109/08923973.2015.1059439] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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19
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Yuen B, Bayes JM, Degnan SM. The characterization of sponge NLRs provides insight into the origin and evolution of this innate immune gene family in animals. Mol Biol Evol 2014; 31:106-20. [PMID: 24092772 PMCID: PMC3879445 DOI: 10.1093/molbev/mst174] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
The "Nucleotide-binding domain and Leucine-rich Repeat" (NLR) genes are a family of intracellular pattern recognition receptors (PRR) that are a critical component of the metazoan innate immune system, involved in both defense against pathogenic microorganisms and in beneficial interactions with symbionts. To investigate the origin and evolution of the NLR gene family, we characterized the full NACHT domain-containing gene complement in the genome of the sponge, Amphimedon queenslandica. As sister group to all animals, sponges are ideally placed to inform our understanding of the early evolution of this ancient PRR family. Amphimedon queenslandica has a large NACHT domain-containing gene complement that is dominated by bona fide NLRs (n = 135) with varied phylogenetic histories. Approximately half of these have a tripartite architecture that includes an N-terminal CARD or DEATH domain. The multiplicity of the A. queenslandica NLR genes and the high variability across the N- and C-terminal domains are consistent with involvement in immunity. We also provide new insight into the evolution of NLRs in invertebrates through comparative genomic analysis of multiple metazoan and nonmetazoan taxa. Specifically, we demonstrate that the NLR gene family appears to be a metazoan innovation, characterized by two major gene lineages that may have originated with the last common eumetazoan ancestor. Subsequent lineage-specific gene duplication, gene loss and domain shuffling all have played an important role in the highly dynamic evolutionary history of invertebrate NLRs.
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Affiliation(s)
- Benedict Yuen
- School of Biological Sciences, The University of Queensland, Brisbane, Queensland, Australia
| | - Joanne M. Bayes
- School of Biological Sciences, The University of Queensland, Brisbane, Queensland, Australia
| | - Sandie M. Degnan
- School of Biological Sciences, The University of Queensland, Brisbane, Queensland, Australia
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20
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Liu D, Rhebergen AM, Eisenbarth SC. Licensing Adaptive Immunity by NOD-Like Receptors. Front Immunol 2013; 4:486. [PMID: 24409181 PMCID: PMC3873523 DOI: 10.3389/fimmu.2013.00486] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2013] [Accepted: 12/10/2013] [Indexed: 12/30/2022] Open
Abstract
The innate immune system is composed of a diverse set of host defense molecules, physical barriers, and specialized leukocytes and is the primary form of immune defense against environmental insults. Another crucial role of innate immunity is to shape the long-lived adaptive immune response mediated by T and B lymphocytes. The activation of pattern recognition receptors (PRRs) from the Toll-like receptor family is now a classic example of innate immune molecules influencing adaptive immunity, resulting in effective antigen presentation to naïve T cells. More recent work suggests that the activation of another family of PRRs, the NOD-like receptors (NLRs), induces a different set of innate immune responses and accordingly, drives different aspects of adaptive immunity. Yet how this unusually diverse family of molecules (some without canonical PRR function) regulates immunity remains incompletely understood. In this review, we discuss the evidence for and against NLR activity orchestrating adaptive immune responses during infectious as well as non-infectious challenges.
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Affiliation(s)
- Dong Liu
- Department of Laboratory Medicine, Yale University School of Medicine , New Haven, CT , USA ; Department of Immunobiology, Yale University School of Medicine , New Haven, CT , USA ; Department of Internal Medicine, Yale University School of Medicine , New Haven, CT , USA
| | - Anne Marie Rhebergen
- Department of Laboratory Medicine, Yale University School of Medicine , New Haven, CT , USA ; Department of Immunobiology, Yale University School of Medicine , New Haven, CT , USA ; Department of Internal Medicine, Yale University School of Medicine , New Haven, CT , USA
| | - Stephanie C Eisenbarth
- Department of Laboratory Medicine, Yale University School of Medicine , New Haven, CT , USA ; Department of Immunobiology, Yale University School of Medicine , New Haven, CT , USA ; Department of Internal Medicine, Yale University School of Medicine , New Haven, CT , USA
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