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Yokosawa T, Miyagawa S, Suzuki W, Nada Y, Hirata Y, Noguchi T, Matsuzawa A. The E3 Ubiquitin Protein Ligase LINCR Amplifies the TLR-Mediated Signals through Direct Degradation of MKP1. Cells 2024; 13:687. [PMID: 38667302 PMCID: PMC11048823 DOI: 10.3390/cells13080687] [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: 12/15/2023] [Revised: 04/13/2024] [Accepted: 04/13/2024] [Indexed: 04/28/2024] Open
Abstract
Toll-like receptors (TLRs) induce innate immune responses through activation of intracellular signaling pathways, such as MAP kinase and NF-κB signaling pathways, and play an important role in host defense against bacterial or viral infections. Meanwhile, excessive activation of TLR signaling leads to a variety of inflammatory disorders, including autoimmune diseases. TLR signaling is therefore strictly controlled to balance optimal immune response and inflammation. However, its balancing mechanisms are not fully understood. In this study, we identified the E3 ubiquitin ligase LINCR/ NEURL3 as a critical regulator of TLR signaling. In LINCR-deficient cells, the sustained activation of JNK and p38 MAPKs induced by the agonists for TLR3, TLR4, and TLR5, was clearly attenuated. Consistent with these observations, TLR-induced production of a series of inflammatory cytokines was significantly attenuated, suggesting that LINCR positively regulates innate immune responses by promoting the activation of JNK and p38. Interestingly, our further mechanistic study identified MAPK phosphatase-1 (MKP1), a negative regulator of MAP kinases, as a ubiquitination target of LINCR. Thus, our results demonstrate that TLRs fine-tune the activation of MAP kinase pathways by balancing LINCR (the positive regulator) and MKP1 (the negative regulator), which may contribute to the induction of optimal immune responses.
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Affiliation(s)
| | | | | | | | | | - Takuya Noguchi
- Laboratory of Health Chemistry, Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai 980-8578, Japan
| | - Atsushi Matsuzawa
- Laboratory of Health Chemistry, Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai 980-8578, Japan
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2
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Ning X, Du J, Gong Y, Yao Y, Bai Z, Ni Y, Li Y, Li Z, Zhao H, Zhou J, Liu B, Lan Y, Hou S. Divergent expression of Neurl3 from hemogenic endothelial cells to hematopoietic stem progenitor cells during development. J Genet Genomics 2023; 50:661-675. [PMID: 37230320 DOI: 10.1016/j.jgg.2023.05.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2023] [Revised: 05/07/2023] [Accepted: 05/15/2023] [Indexed: 05/27/2023]
Abstract
Prior to the generation of hematopoietic stem cells (HSCs) from the hemogenic endothelial cells (HECs) mainly in the dorsal aorta in midgestational mouse embryos, multiple hematopoietic progenitors including erythro-myeloid progenitors and lymphoid progenitors are generated from yolk sac HECs. These HSC-independent hematopoietic progenitors have recently been identified as major contributors to functional blood cell production until birth. However, little is known about yolk sac HECs. Here, combining integrative analyses of multiple single-cell RNA-sequencing datasets and functional assays, we reveal that Neurl3-EGFP, in addition to marking the continuum throughout the ontogeny of HSCs from HECs, can also serve as a single enrichment marker for yolk sac HECs. Moreover, while yolk sac HECs have much weaker arterial characteristics than either arterial endothelial cells in the yolk sac or HECs within the embryo proper, the lymphoid potential of yolk sac HECs is largely confined to the arterial-biased subpopulation featured by the Unc5b expression. Interestingly, the B lymphoid potential of hematopoietic progenitors, but not for myeloid potentials, is exclusively detected in Neurl3-negative subpopulations in midgestational embryos. Taken together, these findings enhance our understanding of blood birth from yolk sac HECs and provide theoretical basis and candidate reporters for monitoring step-wise hematopoietic differentiation.
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Affiliation(s)
- Xiaowei Ning
- State Key Laboratory of Proteomics, Academy of Military Medical Sciences, Academy of Military Sciences, Beijing 100850, China
| | - Junjie Du
- Chinese PLA Medical School, Chinese PLA General Hospital, Beijing 100853, China; State Key Laboratory of Experimental Hematology, Haihe Laboratory of Cell Ecosystem, Institute of Hematology, Senior Department of Hematology, The Fifth Medical Center of Chinese PLA General Hospital, Beijing 100071, China
| | - Yandong Gong
- State Key Laboratory of Experimental Hematology, Haihe Laboratory of Cell Ecosystem, Institute of Hematology, Senior Department of Hematology, The Fifth Medical Center of Chinese PLA General Hospital, Beijing 100071, China
| | - Yingpeng Yao
- Key Laboratory for Regenerative Medicine of Ministry of Education, Institute of Hematology, School of Medicine, Jinan University, Guangzhou, Guangdong 510632, China
| | - Zhijie Bai
- Chinese PLA Medical School, Chinese PLA General Hospital, Beijing 100853, China
| | - Yanli Ni
- State Key Laboratory of Experimental Hematology, Haihe Laboratory of Cell Ecosystem, Institute of Hematology, Senior Department of Hematology, The Fifth Medical Center of Chinese PLA General Hospital, Beijing 100071, China
| | - Yanyan Li
- Key Laboratory for Regenerative Medicine of Ministry of Education, Institute of Hematology, School of Medicine, Jinan University, Guangzhou, Guangdong 510632, China
| | - Zongcheng Li
- State Key Laboratory of Experimental Hematology, Haihe Laboratory of Cell Ecosystem, Institute of Hematology, Senior Department of Hematology, The Fifth Medical Center of Chinese PLA General Hospital, Beijing 100071, China
| | - Haixin Zhao
- State Key Laboratory of Experimental Hematology, Haihe Laboratory of Cell Ecosystem, Institute of Hematology, Senior Department of Hematology, The Fifth Medical Center of Chinese PLA General Hospital, Beijing 100071, China
| | - Jie Zhou
- State Key Laboratory of Experimental Hematology, Haihe Laboratory of Cell Ecosystem, Institute of Hematology, Senior Department of Hematology, The Fifth Medical Center of Chinese PLA General Hospital, Beijing 100071, China
| | - Bing Liu
- State Key Laboratory of Proteomics, Academy of Military Medical Sciences, Academy of Military Sciences, Beijing 100850, China; Chinese PLA Medical School, Chinese PLA General Hospital, Beijing 100853, China; State Key Laboratory of Experimental Hematology, Haihe Laboratory of Cell Ecosystem, Institute of Hematology, Senior Department of Hematology, The Fifth Medical Center of Chinese PLA General Hospital, Beijing 100071, China; Key Laboratory for Regenerative Medicine of Ministry of Education, Institute of Hematology, School of Medicine, Jinan University, Guangzhou, Guangdong 510632, China.
| | - Yu Lan
- Key Laboratory for Regenerative Medicine of Ministry of Education, Institute of Hematology, School of Medicine, Jinan University, Guangzhou, Guangdong 510632, China.
| | - Siyuan Hou
- State Key Laboratory of Experimental Hematology, Haihe Laboratory of Cell Ecosystem, Institute of Hematology, Senior Department of Hematology, The Fifth Medical Center of Chinese PLA General Hospital, Beijing 100071, China; Key Laboratory for Regenerative Medicine of Ministry of Education, Institute of Hematology, School of Medicine, Jinan University, Guangzhou, Guangdong 510632, China.
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3
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Qi F, Zhang X, Wang L, Ren C, Zhao X, Luo J, Lu D. E3 ubiquitin ligase NEURL3 promotes innate antiviral response through catalyzing K63-linked ubiquitination of IRF7. FASEB J 2022; 36:e22409. [PMID: 35792897 DOI: 10.1096/fj.202200316r] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2022] [Revised: 05/16/2022] [Accepted: 05/28/2022] [Indexed: 11/11/2022]
Abstract
Interferon regulatory factor 7 (IRF7), as the interferon-stimulated gene, maximally drives type I interferon (IFN) production. However, the mechanisms by which the biological function of IRF7 is regulated remain elusive. In this study, we found that IRF7 selectively interacted with the neuralized E3 ubiquitin-protein ligase 3 (NEURL3). In concomitant with IRF7 induction, NEURL3 is upregulated by NF-κB signaling in the late phase of viral infection. Moreover, NEURL3 augmented the host antiviral immune response through ubiquitinating IRF7. A mechanistic study revealed that NEURL3 triggered K63-linked poly-ubiquitination on IRF7 lysine 375, which in turn epigenetically enhanced the transcription of interferon-stimulated genes (ISGs) through disruption of the association of IRF7 with Histone Deacetylase 1 (HDAC1), consequently augmenting host antiviral immune response. Accordingly, Neurl3-/- mice produced less type I IFNs and exhibited increased susceptibility to viral infection. Taken together, our findings identify NEURL3 as an E3 ubiquitin ligase of IRF7 and shed new light on the positive regulation of IRF7 in host antiviral immune signaling.
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Affiliation(s)
- Fang Qi
- Institute of Systems Biomedicine, School of Basic Medical Sciences, Beijing Key Laboratory of Tumor Systems Biology, Peking University Health Science Center, Beijing, P.R. China
| | - Xin Zhang
- Institute of Systems Biomedicine, School of Basic Medical Sciences, Beijing Key Laboratory of Tumor Systems Biology, Peking University Health Science Center, Beijing, P.R. China
| | - Likun Wang
- Institute of Systems Biomedicine, School of Basic Medical Sciences, Beijing Key Laboratory of Tumor Systems Biology, Peking University Health Science Center, Beijing, P.R. China
| | - Caixia Ren
- Department of Human Anatomy, Histology and Embryology, Peking University Health Science Center, Beijing, P.R. China
| | - Xuyang Zhao
- Institute of Systems Biomedicine, School of Basic Medical Sciences, Beijing Key Laboratory of Tumor Systems Biology, Peking University Health Science Center, Beijing, P.R. China
| | - Jianyuan Luo
- Department of Medical Genetics, Peking University Health Science Center, Beijing, P.R. China
| | - Dan Lu
- Institute of Systems Biomedicine, School of Basic Medical Sciences, Beijing Key Laboratory of Tumor Systems Biology, Peking University Health Science Center, Beijing, P.R. China
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Embryonic endothelial evolution towards first hematopoietic stem cells revealed by single-cell transcriptomic and functional analyses. Cell Res 2020; 30:376-392. [PMID: 32203131 PMCID: PMC7196075 DOI: 10.1038/s41422-020-0300-2] [Citation(s) in RCA: 75] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Accepted: 02/24/2020] [Indexed: 02/07/2023] Open
Abstract
Hematopoietic stem cells (HSCs) in adults are believed to be born from hemogenic endothelial cells (HECs) in mid-gestational embryos. Due to the rare and transient nature, the HSC-competent HECs have never been stringently identified and accurately captured, let alone their genuine vascular precursors. Here, we first used high-precision single-cell transcriptomics to unbiasedly examine the relevant EC populations at continuous developmental stages with intervals of 0.5 days from embryonic day (E) 9.5 to E11.0. As a consequence, we transcriptomically identified two molecularly different arterial EC populations and putative HSC-primed HECs, whose number peaked at E10.0 and sharply decreased thereafter, in the dorsal aorta of the aorta-gonad-mesonephros (AGM) region. Combining computational prediction and in vivo functional validation, we precisely captured HSC-competent HECs by the newly constructed Neurl3-EGFP reporter mouse model, and realized the enrichment further by a combination of surface markers (Procr+Kit+CD44+, PK44). Surprisingly, the endothelial-hematopoietic dual potential was rarely but reliably witnessed in the cultures of single HECs. Noteworthy, primitive vascular ECs from E8.0 experienced two-step fate choices to become HSC-primed HECs, namely an initial arterial fate choice followed by a hemogenic fate conversion. This finding resolves several previously observed contradictions. Taken together, comprehensive understanding of endothelial evolutions and molecular programs underlying HSC-primed HEC specification in vivo will facilitate future investigations directing HSC production in vitro.
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Kumar R, Derbigny WA. TLR3 Deficiency Leads to a Dysregulation in the Global Gene-Expression Profile in Murine Oviduct Epithelial Cells Infected with Chlamydia muridarum. ACTA ACUST UNITED AC 2020; 1:1-13. [PMID: 31891165 PMCID: PMC6937138 DOI: 10.18689/ijmr-1000101] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Chlamydia trachomatis replicates primarily in the epithelial cells lining the genital tract and induces the innate immune response by triggering cellular pathogen recognition receptors (PRRs). Our previous studies showed that Toll-like receptor 3 (TLR3) is expressed in murine oviduct epithelial (OE) cells, is the primary PRR triggered by C. muridarum (Cm) early during infection to induce IFN-β synthesis, and that TLR3 signaling regulates the chlamydial induced synthesis of a plethora of other innate inflammatory modulators including IL-6, CXCL10, CXCL16 and CCL5. We also showed that the expression of these cytokines induced by Chlamydia was severely diminished during TLR3 deficiency; however, the replication of Chlamydiain TLR3 deficient OE cells was more robust than in WT cells. These data suggested that TLR3 had a biological impact on the inflammatory response to Chlamydia infection; however, the global effects of TLR3 signaling in the cellular response to Chlamydia infection in murine OE cells has not yet been investigated. To determine the impact of TLR3 signaling on Chlamydia infection in OE cell at the transcriptome level, we infected wild-type (OE-WT) and TLR3-deficient (OE-TLR3KO) cells with Cm, and performed transcriptome analyses using microarray. Genome-wide expression and ingenuity pathway analysis (IPA) identified enhanced expression of host genes encoding for components found in multiple cellular processes encompassing: (1) pro-inflammatory, (2) cell adhesion, (3) chemoattraction, (4) cellular matrix and small molecule transport, (5) apoptosis, and (6) antigen-processing and presentation. These results support a role for TLR3 in modulating the host cellular responses to Cm infection that extend beyond inflammation and fibrosis, and shows that TLR3 could serve a potential therapeutic target for drug and/or vaccine development.
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Affiliation(s)
- Ramesh Kumar
- Department of Microbiology and Immunology, Indiana University School of Medicine, Indianapolis, Indiana-46202, USA
| | - Wilbert A Derbigny
- Department of Microbiology and Immunology, Indiana University School of Medicine, Indianapolis, Indiana-46202, USA
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6
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Taal K, Tuvikene J, Rullinkov G, Piirsoo M, Sepp M, Neuman T, Tamme R, Timmusk T. Neuralized family member NEURL1 is a ubiquitin ligase for the cGMP-specific phosphodiesterase 9A. Sci Rep 2019; 9:7104. [PMID: 31068605 PMCID: PMC6506465 DOI: 10.1038/s41598-019-43069-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2019] [Accepted: 04/01/2019] [Indexed: 11/15/2022] Open
Abstract
Neuralized functions as a positive regulator of the Notch pathway by promoting ubiquitination of Notch ligands via its E3 ligase activity, resulting in their efficient endocytosis and signaling. Using a yeast two-hybrid screen, we have identified a cGMP-hydrolysing phosphodiesterase, PDE9A, as a novel interactor and substrate of Neuralized E3 ubiquitin protein ligase 1 (NEURL1). We confirmed this interaction with co-immunoprecipitation experiments and show that both Neuralized Homology Repeat domains of NEURL1 can interact with PDE9A. We also demonstrate that NEURL1 can promote polyubiquitination of PDE9A that leads to its proteasome-mediated degradation mainly via lysine residue K27 of ubiquitin. Our results suggest that NEURL1 acts as a novel regulator of protein levels of PDE9A.
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Affiliation(s)
- Kati Taal
- Department of Chemistry and Biotechnology, Tallinn University of Technology, Akadeemia tee 15, 12618, Tallinn, Estonia
| | - Jürgen Tuvikene
- Department of Chemistry and Biotechnology, Tallinn University of Technology, Akadeemia tee 15, 12618, Tallinn, Estonia
| | - Grete Rullinkov
- Department of Chemistry and Biotechnology, Tallinn University of Technology, Akadeemia tee 15, 12618, Tallinn, Estonia
| | - Marko Piirsoo
- Department of Chemistry and Biotechnology, Tallinn University of Technology, Akadeemia tee 15, 12618, Tallinn, Estonia.,Institute of Technology, University of Tartu, Nooruse 1, 50411, Tartu, Estonia
| | - Mari Sepp
- Department of Chemistry and Biotechnology, Tallinn University of Technology, Akadeemia tee 15, 12618, Tallinn, Estonia.,Center for Molecular Biology of Heidelberg University (ZMBH), DKFZ-ZMBH Alliance, D-69120, Heidelberg, Germany
| | | | - Richard Tamme
- Department of Chemistry and Biotechnology, Tallinn University of Technology, Akadeemia tee 15, 12618, Tallinn, Estonia.
| | - Tõnis Timmusk
- Department of Chemistry and Biotechnology, Tallinn University of Technology, Akadeemia tee 15, 12618, Tallinn, Estonia.
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7
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Neuralized E3 Ubiquitin Protein Ligase 3 Is an Inducible Antiviral Effector That Inhibits Hepatitis C Virus Assembly by Targeting Viral E1 Glycoprotein. J Virol 2018; 92:JVI.01123-18. [PMID: 30111563 DOI: 10.1128/jvi.01123-18] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2018] [Accepted: 08/08/2018] [Indexed: 12/14/2022] Open
Abstract
Hepatitis C virus (HCV) infection is a major cause of chronic hepatitis, liver cirrhosis, and hepatocellular carcinoma. HCV can be sensed by host innate immunity to induce expression of interferons (IFNs) and a number of antiviral effectors. In this study, we found HCV infection induced the expression of neuralized E3 ubiquitin protein ligase 3 (NEURL3), a putative E3 ligase, in a manner that requires the involvement of innate immune sensing but is independent of the IFN action. Furthermore, we showed that NEURL3 inhibited HCV infection while it had little effect on other RNA viruses, including Zika virus (ZIKV), dengue virus (DENV), and vesicular stomatitis virus (VSV). Mechanistic studies demonstrated that NEURL3 inhibited HCV assembly by directly binding HCV envelope glycoprotein E1 to interfere with the E1/E2 heterodimerization, an important prerequisite for virion morphogenesis. Finally, we showed that knockout of NEURL3 significantly enhanced HCV infection. In summary, we identified NEURL3 as a novel inducible antiviral host factor that suppresses HCV assembly. Our results not only shed new insight into how host innate immunity acts against HCV but also revealed a new important biological function for NEURL3.IMPORTANCE The exact biological function of NEURL3, a putative E3 ligase, remains largely unknown. In this study, we found that NEURL3 could be upregulated upon HCV infection in a manner dependent on pattern recognition receptor-mediated innate immune response. NEURL3 inhibits HCV assembly by directly binding viral E1 envelope glycoprotein to disrupt its interaction with E2, an action that requires its Neuralized homology repeat (NHR) domain but not the RING domain. Furthermore, we found that NEURL3 has a pangenotypic anti-HCV activity and interacts with E1 of genotypes 2a, 1b, 3a, and 6a but does not inhibit other closely related RNA viruses, such as ZIKV, DENV, and VSV. To our knowledge, our study is the first report to demonstrate that NEURL3 functions as an antiviral host factor. Our results not only shed new insight into how host innate immunity acts against HCV, but also revealed a new important biological function for NEURL3.
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8
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Liu S, Boulianne GL. The NHR domains of Neuralized and related proteins: Beyond Notch signalling. Cell Signal 2017; 29:62-68. [DOI: 10.1016/j.cellsig.2016.10.004] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2016] [Revised: 10/03/2016] [Accepted: 10/12/2016] [Indexed: 11/17/2022]
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9
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Londhe VA, Tomi T, Nguyen TT, Lopez B, Smith JB. Overexpression of LINCR in the developing mouse lung epithelium inhibits distal differentiation and induces cystic changes. Dev Dyn 2015; 244:827-38. [DOI: 10.1002/dvdy.24286] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2014] [Revised: 03/31/2015] [Accepted: 04/09/2015] [Indexed: 01/02/2023] Open
Affiliation(s)
- Vedang A. Londhe
- Neonatal Research Center; Department of Pediatrics; Division of Neonatology and Developmental Biology; David Geffen School of Medicine at UCLA; Los Angeles California
| | - Tomoko Tomi
- Neonatal Research Center; Department of Pediatrics; Division of Neonatology and Developmental Biology; David Geffen School of Medicine at UCLA; Los Angeles California
| | - Tam T. Nguyen
- Neonatal Research Center; Department of Pediatrics; Division of Neonatology and Developmental Biology; David Geffen School of Medicine at UCLA; Los Angeles California
| | - Benjamin Lopez
- Neonatal Research Center; Department of Pediatrics; Division of Neonatology and Developmental Biology; David Geffen School of Medicine at UCLA; Los Angeles California
| | - Jeffrey B. Smith
- Neonatal Research Center; Department of Pediatrics; Division of Neonatology and Developmental Biology; David Geffen School of Medicine at UCLA; Los Angeles California
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Han S, Lear TB, Jerome JA, Rajbhandari S, Snavely CA, Gulick DL, Gibson KF, Zou C, Chen BB, Mallampalli RK. Lipopolysaccharide Primes the NALP3 Inflammasome by Inhibiting Its Ubiquitination and Degradation Mediated by the SCFFBXL2 E3 Ligase. J Biol Chem 2015; 290:18124-18133. [PMID: 26037928 DOI: 10.1074/jbc.m115.645549] [Citation(s) in RCA: 138] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2015] [Indexed: 12/29/2022] Open
Abstract
The inflammasome is a multiprotein complex that augments the proinflammatory response by increasing the generation and cellular release of key cytokines. Specifically, the NALP3 inflammasome requires two-step signaling, priming and activation, to be functional to release the proinflammatory cytokines IL-1β and IL-18. The priming process, through unknown mechanisms, increases the protein levels of NALP3 and pro-IL-1β in cells. Here we show that LPS increases the NALP3 protein lifespan without significantly altering steady-state mRNA in human cells. LPS exposure reduces the ubiquitin-mediated proteasomal processing of NALP3 by inducing levels of an E3 ligase component, FBXO3, which targets FBXL2. The latter is an endogenous mediator of NALP3 degradation. FBXL2 recognizes Trp-73 within NALP3 for interaction and targets Lys-689 within NALP3 for ubiquitin ligation and degradation. A unique small molecule inhibitor of FBXO3 restores FBXL2 levels, resulting in decreased NALP3 protein levels in cells and, thereby, reducing the release of IL-1β and IL-18 in human inflammatory cells after NALP3 activation. Our findings uncover NALP3 as a molecular target for FBXL2 and suggest that therapeutic targeting of the inflammasome may serve as a platform for preclinical intervention.
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Affiliation(s)
- SeungHye Han
- Department of Medicine, Acute Lung Injury Center of Excellence, University of Pittsburgh, Pittsburgh, Pennsylvania 15213
| | - Travis B Lear
- Department of Medicine, Acute Lung Injury Center of Excellence, University of Pittsburgh, Pittsburgh, Pennsylvania 15213
| | - Jacob A Jerome
- Department of Medicine, Acute Lung Injury Center of Excellence, University of Pittsburgh, Pittsburgh, Pennsylvania 15213
| | - Shristi Rajbhandari
- Department of Medicine, Acute Lung Injury Center of Excellence, University of Pittsburgh, Pittsburgh, Pennsylvania 15213
| | - Courtney A Snavely
- Department of Medicine, Acute Lung Injury Center of Excellence, University of Pittsburgh, Pittsburgh, Pennsylvania 15213
| | - Dexter L Gulick
- Department of Medicine, Acute Lung Injury Center of Excellence, University of Pittsburgh, Pittsburgh, Pennsylvania 15213
| | - Kevin F Gibson
- Department of Medicine, Acute Lung Injury Center of Excellence, University of Pittsburgh, Pittsburgh, Pennsylvania 15213
| | - Chunbin Zou
- Department of Medicine, Acute Lung Injury Center of Excellence, University of Pittsburgh, Pittsburgh, Pennsylvania 15213
| | - Bill B Chen
- Department of Medicine, Acute Lung Injury Center of Excellence, University of Pittsburgh, Pittsburgh, Pennsylvania 15213
| | - Rama K Mallampalli
- Department of Medicine, Acute Lung Injury Center of Excellence, University of Pittsburgh, Pittsburgh, Pennsylvania 15213; Department of Cell Biology, Physiology, and Bioengineering, University of Pittsburgh, Pittsburgh, Pennsylvania 15213; Medical Specialty Service Line, Veterans Affairs Pittsburgh Healthcare System, Pittsburgh, Pennsylvania 15240.
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11
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Han S, Mallampalli RK. The acute respiratory distress syndrome: from mechanism to translation. THE JOURNAL OF IMMUNOLOGY 2015; 194:855-60. [PMID: 25596299 DOI: 10.4049/jimmunol.1402513] [Citation(s) in RCA: 278] [Impact Index Per Article: 30.9] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The acute respiratory distress syndrome (ARDS) is a form of severe hypoxemic respiratory failure that is characterized by inflammatory injury to the alveolar capillary barrier, with extravasation of protein-rich edema fluid into the airspace. Although many modalities to treat ARDS have been investigated over the past several decades, supportive therapies remain the mainstay of treatment. In this article, we briefly review the definition, epidemiology, and pathophysiology of ARDS and present emerging aspects of ARDS pathophysiology that encompass modulators of the innate immune response, damage signals, and aberrant proteolysis that may serve as a foundation for future therapeutic targets.
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Affiliation(s)
- SeungHye Han
- Division of Pulmonary, Allergy, and Critical Care Medicine, Department of Medicine, Acute Lung Injury Center of Excellence, University of Pittsburgh, Pittsburgh, PA 15213
| | - Rama K Mallampalli
- Division of Pulmonary, Allergy, and Critical Care Medicine, Department of Medicine, Acute Lung Injury Center of Excellence, University of Pittsburgh, Pittsburgh, PA 15213; Department of Cell Biology and Physiology, University of Pittsburgh, Pittsburgh, PA 15213; and Medical Specialty Service Line, Veterans Affairs Pittsburgh Healthcare System, Pittsburgh, PA 15240
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12
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Functional analysis of the NHR2 domain indicates that oligomerization of Neuralized regulates ubiquitination and endocytosis of Delta during Notch signaling. Mol Cell Biol 2012; 32:4933-45. [PMID: 23045391 DOI: 10.1128/mcb.00711-12] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
The Notch pathway plays an integral role in development by regulating cell fate in a wide variety of multicellular organisms. A critical step in the activation of Notch signaling is the endocytosis of the Notch ligands Delta and Serrate. Ligand endocytosis is regulated by one of two E3 ubiquitin ligases, Neuralized (Neur) or Mind bomb. Neur is comprised of a C-terminal RING domain, which is required for Delta ubiquitination, and two Neur homology repeat (NHR) domains. We have previously shown that the NHR1 domain is required for Delta trafficking. Here we show that the NHR1 domain also affects the binding and internalization of Serrate. Furthermore, we show that the NHR2 domain is required for Neur function and that a point mutation in the NHR2 domain (Gly430) abolishes Neur ubiquitination activity and affects ligand internalization. Finally, we provide evidence that Neur can form oligomers in both cultured cells and fly tissues, which regulate Neur activity and, by extension, ligand internalization.
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Qiu Z, MacRae TH. A Molecular Overview of Diapause in Embryos of the Crustacean, Artemia franciscana. DORMANCY AND RESISTANCE IN HARSH ENVIRONMENTS 2010. [DOI: 10.1007/978-3-642-12422-8_10] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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14
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He F, Saito K, Kobayashi N, Harada T, Watanabe S, Kigawa T, Güntert P, Ohara O, Tanaka A, Unzai S, Muto Y, Yokoyama S. Structural and Functional Characterization of the NHR1 Domain of the Drosophila Neuralized E3 Ligase in the Notch Signaling Pathway. J Mol Biol 2009; 393:478-95. [DOI: 10.1016/j.jmb.2009.08.020] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2009] [Revised: 08/03/2009] [Accepted: 08/10/2009] [Indexed: 01/05/2023]
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15
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Dai J, Ma D, Zang S, Guo D, Qu X, Ye J, Ji C. Cross-talk between Notch and EGFR signaling in human breast cancer cells. Cancer Invest 2009; 27:533-40. [PMID: 19219656 DOI: 10.1080/07357900802563036] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Notch and epidermal growth factor receptor (EGFR) signaling play critical roles in cell proliferation, differentiation, and apoptosis, and thereby may contribute to the development of breast cancer. We constitutively overexpressed active Notch1 in human breast cancer cells to explore the consequences of Notch1 signaling on cell growth and to investigate the underlying molecular mechanisms. We found that EGFR expression was increased. Then, using EGFR inhibitor, we found it exhibited an inhibitory role on human breast cancer cells. Overexpression of Notch1 could reverse EGFR inhibitor-induced cell toxicity, suggesting that Notch and EGFR signaling may be positively cross-linked in human breast cancer.
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Affiliation(s)
- Jianjian Dai
- Department of Hematology, Qilu Hospital, Shandong University, Jinan, Shandong, P R China
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Gene expression in diapause-destined embryos of the crustacean, Artemia franciscana. Mech Dev 2007; 124:856-67. [DOI: 10.1016/j.mod.2007.09.001] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2007] [Revised: 09/02/2007] [Accepted: 09/07/2007] [Indexed: 11/21/2022]
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Commisso C, Boulianne GL. The NHR1 domain of Neuralized binds Delta and mediates Delta trafficking and Notch signaling. Mol Biol Cell 2006; 18:1-13. [PMID: 17065551 PMCID: PMC1751308 DOI: 10.1091/mbc.e06-08-0753] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
Notch signaling, which is crucial to metazoan development, requires endocytosis of Notch ligands, such as Delta and Serrate. Neuralized is a plasma membrane-associated ubiquitin ligase that is required for neural development and Delta internalization. Neuralized is comprised of three domains that include a C-terminal RING domain and two neuralized homology repeat (NHR) domains. All three domains are conserved between organisms, suggesting that these regions of Neuralized are functionally important. Although the Neuralized RING domain has been shown to be required for Delta ubiquitination, the function of the NHR domains remains elusive. Here we show that neuralized, a well-characterized neurogenic allele, exhibits a mutation in a conserved residue of the NHR1 domain that results in mislocalization of Neuralized and defects in Delta binding and internalization. Furthermore, we describe a novel isoform of Neuralized and show that it is recruited to the plasma membrane by Delta and that this is mediated by the NHR1 domain. Finally, we show that the NHR1 domain of Neuralized is both necessary and sufficient to bind Delta. Altogether, our data demonstrate that NHR domains can function in facilitating protein-protein interactions and in the case of Neuralized, mediate binding to its ubiquitination target, Delta.
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Affiliation(s)
- Cosimo Commisso
- The Hospital for Sick Children, Program in Developmental Biology and Department of Molecular and Medical Genetics, University of Toronto, Toronto, Ontario, Canada M5G 1X8
| | - Gabrielle L. Boulianne
- The Hospital for Sick Children, Program in Developmental Biology and Department of Molecular and Medical Genetics, University of Toronto, Toronto, Ontario, Canada M5G 1X8
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