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Eltayeb A, Al-Sarraj F, Alharbi M, Albiheyri R, Mattar EH, Abu Zeid IM, Bouback TA, Bamagoos A, Uversky VN, Rubio-Casillas A, Redwan EM. Intrinsic factors behind long COVID: IV. Hypothetical roles of the SARS-CoV-2 nucleocapsid protein and its liquid-liquid phase separation. J Cell Biochem 2024; 125:e30530. [PMID: 38349116 DOI: 10.1002/jcb.30530] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2023] [Revised: 01/10/2024] [Accepted: 01/24/2024] [Indexed: 03/12/2024]
Abstract
When the SARS-CoV-2 virus infects humans, it leads to a condition called COVID-19 that has a wide spectrum of clinical manifestations, from no symptoms to acute respiratory distress syndrome. The virus initiates damage by attaching to the ACE-2 protein on the surface of endothelial cells that line the blood vessels and using these cells as hosts for replication. Reactive oxygen species levels are increased during viral replication, which leads to oxidative stress. About three-fifths (~60%) of the people who get infected with the virus eradicate it from their body after 28 days and recover their normal activity. However, a large fraction (~40%) of the people who are infected with the virus suffer from various symptoms (anosmia and/or ageusia, fatigue, cough, myalgia, cognitive impairment, insomnia, dyspnea, and tachycardia) beyond 12 weeks and are diagnosed with a syndrome called long COVID. Long-term clinical studies in a group of people who contracted SARS-CoV-2 have been contrasted with a noninfected matched group of people. A subset of infected people can be distinguished by a set of cytokine markers to have persistent, low-grade inflammation and often self-report two or more bothersome symptoms. No medication can alleviate their symptoms efficiently. Coronavirus nucleocapsid proteins have been investigated extensively as potential drug targets due to their key roles in virus replication, among which is their ability to bind their respective genomic RNAs for incorporation into emerging virions. This review highlights basic studies of the nucleocapsid protein and its ability to undergo liquid-liquid phase separation. We hypothesize that this ability of the nucleocapsid protein for phase separation may contribute to long COVID. This hypothesis unlocks new investigation angles and could potentially open novel avenues for a better understanding of long COVID and treating this condition.
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Affiliation(s)
- Ahmed Eltayeb
- Department of Biological Sciences, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Faisal Al-Sarraj
- Department of Biological Sciences, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Mona Alharbi
- Department of Biological Sciences, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Raed Albiheyri
- Department of Biological Sciences, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia
- Centre of Excellence in Bionanoscience Research, King Abdulaziz University, Jeddah, Saudi Arabia
- Immunology Unit, King Fahad Medical Research Centre, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Ehab H Mattar
- Department of Biological Sciences, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Isam M Abu Zeid
- Department of Biological Sciences, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Thamer A Bouback
- Department of Biological Sciences, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Atif Bamagoos
- Department of Biological Sciences, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Vladimir N Uversky
- Department of Molecular Medicine and USF Health Byrd Alzheimer's Research Institute, Morsani College of Medicine, University of South Florida, Tampa, Florida, USA
- Pushchino Scientific Center for Biological Research of the Russian Academy of Sciences, Moscow Region, Russia
| | - Alberto Rubio-Casillas
- Autlan Regional Hospital, Health Secretariat, Autlan, Jalisco, Mexico
- Biology Laboratory, Autlan Regional Preparatory School, University of Guadalajara, Autlan, Jalisco, Mexico
| | - Elrashdy M Redwan
- Department of Biological Sciences, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia
- Centre of Excellence in Bionanoscience Research, King Abdulaziz University, Jeddah, Saudi Arabia
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2
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Furthmann N, Bader V, Angersbach L, Blusch A, Goel S, Sánchez-Vicente A, Krause LJ, Chaban SA, Grover P, Trinkaus VA, van Well EM, Jaugstetter M, Tschulik K, Damgaard RB, Saft C, Ellrichmann G, Gold R, Koch A, Englert B, Westenberger A, Klein C, Jungbluth L, Sachse C, Behrends C, Glatzel M, Hartl FU, Nakamura K, Christine CW, Huang EJ, Tatzelt J, Winklhofer KF. NEMO reshapes the α-Synuclein aggregate interface and acts as an autophagy adapter by co-condensation with p62. Nat Commun 2023; 14:8368. [PMID: 38114471 PMCID: PMC10730909 DOI: 10.1038/s41467-023-44033-0] [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: 02/08/2023] [Accepted: 11/28/2023] [Indexed: 12/21/2023] Open
Abstract
NEMO is a ubiquitin-binding protein which regulates canonical NF-κB pathway activation in innate immune signaling, cell death regulation and host-pathogen interactions. Here we identify an NF-κB-independent function of NEMO in proteostasis regulation by promoting autophagosomal clearance of protein aggregates. NEMO-deficient cells accumulate misfolded proteins upon proteotoxic stress and are vulnerable to proteostasis challenges. Moreover, a patient with a mutation in the NEMO-encoding IKBKG gene resulting in defective binding of NEMO to linear ubiquitin chains, developed a widespread mixed brain proteinopathy, including α-synuclein, tau and TDP-43 pathology. NEMO amplifies linear ubiquitylation at α-synuclein aggregates and promotes the local concentration of p62 into foci. In vitro, NEMO lowers the threshold concentrations required for ubiquitin-dependent phase transition of p62. In summary, NEMO reshapes the aggregate surface for efficient autophagosomal clearance by providing a mobile phase at the aggregate interphase favoring co-condensation with p62.
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Affiliation(s)
- Nikolas Furthmann
- Department Molecular Cell Biology, Institute of Biochemistry and Pathobiochemistry, Ruhr University Bochum, 44801, Bochum, Germany
| | - Verian Bader
- Department Molecular Cell Biology, Institute of Biochemistry and Pathobiochemistry, Ruhr University Bochum, 44801, Bochum, Germany
- Department Biochemistry of Neurodegenerative Diseases, Institute of Biochemistry and Pathobiochemistry, Ruhr University Bochum, 44801, Bochum, Germany
| | - Lena Angersbach
- Department Molecular Cell Biology, Institute of Biochemistry and Pathobiochemistry, Ruhr University Bochum, 44801, Bochum, Germany
| | - Alina Blusch
- Department of Neurology, St Josef Hospital, Ruhr University Bochum, 44791, Bochum, Germany
| | - Simran Goel
- Department Molecular Cell Biology, Institute of Biochemistry and Pathobiochemistry, Ruhr University Bochum, 44801, Bochum, Germany
| | - Ana Sánchez-Vicente
- Department Molecular Cell Biology, Institute of Biochemistry and Pathobiochemistry, Ruhr University Bochum, 44801, Bochum, Germany
| | - Laura J Krause
- Department Molecular Cell Biology, Institute of Biochemistry and Pathobiochemistry, Ruhr University Bochum, 44801, Bochum, Germany
- Cluster of Excellence RESOLV, 44801, Bochum, Germany
| | - Sarah A Chaban
- Department Molecular Cell Biology, Institute of Biochemistry and Pathobiochemistry, Ruhr University Bochum, 44801, Bochum, Germany
| | - Prerna Grover
- Department Biochemistry of Neurodegenerative Diseases, Institute of Biochemistry and Pathobiochemistry, Ruhr University Bochum, 44801, Bochum, Germany
| | - Victoria A Trinkaus
- Department of Cellular Biochemistry, Max Planck Institute of Biochemistry, 82152, Martinsried, Germany
| | - Eva M van Well
- Department Molecular Cell Biology, Institute of Biochemistry and Pathobiochemistry, Ruhr University Bochum, 44801, Bochum, Germany
| | - Maximilian Jaugstetter
- Analytical Chemistry II, Faculty of Chemistry and Biochemistry, Ruhr University Bochum, 44801, Bochum, Germany
| | - Kristina Tschulik
- Cluster of Excellence RESOLV, 44801, Bochum, Germany
- Analytical Chemistry II, Faculty of Chemistry and Biochemistry, Ruhr University Bochum, 44801, Bochum, Germany
| | - Rune Busk Damgaard
- Department of Biotechnology and Biomedicine, Technical University of Denmark, 2800, Kongens Lyngby, Denmark
| | - Carsten Saft
- Department of Neurology, St Josef Hospital, Ruhr University Bochum, 44791, Bochum, Germany
| | - Gisa Ellrichmann
- Department of Neurology, St Josef Hospital, Ruhr University Bochum, 44791, Bochum, Germany
- Department of Neurology, Klinikum Dortmund, University Witten/Herdecke, 44135, Dortmund, Germany
| | - Ralf Gold
- Department of Neurology, St Josef Hospital, Ruhr University Bochum, 44791, Bochum, Germany
| | - Arend Koch
- Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Department of Neuropathology, Charitéplatz 1, 10117, Berlin, Germany
| | - Benjamin Englert
- Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Department of Neuropathology, Charitéplatz 1, 10117, Berlin, Germany
- Center for Neuropathology and Prion Research, Ludwig-Maximilians University, 81377, Munich, Germany
| | - Ana Westenberger
- Institute of Neurogenetics, University of Lübeck, Lübeck, Germany
| | - Christine Klein
- Institute of Neurogenetics, University of Lübeck, Lübeck, Germany
| | - Lisa Jungbluth
- Ernst-Ruska Centre for Microscopy and Spectroscopy with Electrons (ER-C-3/Structural Biology), Forschungszentrum Jülich, Jülich, Germany
- Institute for Biological Information Processing (IBI-6/Cellular Structural Biology), Forschungszentrum Jülich, Jülich, Germany
| | - Carsten Sachse
- Ernst-Ruska Centre for Microscopy and Spectroscopy with Electrons (ER-C-3/Structural Biology), Forschungszentrum Jülich, Jülich, Germany
- Institute for Biological Information Processing (IBI-6/Cellular Structural Biology), Forschungszentrum Jülich, Jülich, Germany
- Department of Biology, Heinrich Heine University, Düsseldorf, Germany
| | - Christian Behrends
- Munich Cluster for Systems Neurology, Faculty of Medicine, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Markus Glatzel
- Institute of Neuropathology, University Medical Center Hamburg-Eppendorf, Martinistraße 52, 20251, Hamburg, Germany
| | - F Ulrich Hartl
- Department of Cellular Biochemistry, Max Planck Institute of Biochemistry, 82152, Martinsried, Germany
- Munich Cluster for Systems Neurology (SyNergy), 81377, Munich, Germany
| | - Ken Nakamura
- Gladstone Institute of Neurological Disease, Gladstone Institutes, San Francisco, CA, USA
- Department of Neurology, University of California, San Francisco, CA, USA
| | - Chadwick W Christine
- Department of Neurology, University of California, San Francisco, CA, USA
- Weill Institute for Neurosciences, University of California San Francisco, San Francisco, CA, USA
| | - Eric J Huang
- Department of Neurology, University of California, San Francisco, CA, USA
- Department of Pathology, University of California, San Francisco, CA, USA
| | - Jörg Tatzelt
- Department Biochemistry of Neurodegenerative Diseases, Institute of Biochemistry and Pathobiochemistry, Ruhr University Bochum, 44801, Bochum, Germany
- Cluster of Excellence RESOLV, 44801, Bochum, Germany
| | - Konstanze F Winklhofer
- Department Molecular Cell Biology, Institute of Biochemistry and Pathobiochemistry, Ruhr University Bochum, 44801, Bochum, Germany.
- Cluster of Excellence RESOLV, 44801, Bochum, Germany.
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3
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DiRusso CJ, DeMaria AM, Wong J, Wang W, Jordanides JJ, Whitty A, Allen KN, Gilmore TD. A conserved core region of the scaffold NEMO is essential for signal-induced conformational change and liquid-liquid phase separation. J Biol Chem 2023; 299:105396. [PMID: 37890781 PMCID: PMC10694592 DOI: 10.1016/j.jbc.2023.105396] [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: 05/23/2023] [Revised: 10/05/2023] [Accepted: 10/16/2023] [Indexed: 10/29/2023] Open
Abstract
Scaffold proteins help mediate interactions between protein partners, often to optimize intracellular signaling. Herein, we use comparative, biochemical, biophysical, molecular, and cellular approaches to investigate how the scaffold protein NEMO contributes to signaling in the NF-κB pathway. Comparison of NEMO and the related protein optineurin from a variety of evolutionarily distant organisms revealed that a central region of NEMO, called the Intervening Domain (IVD), is conserved between NEMO and optineurin. Previous studies have shown that this central core region of the IVD is required for cytokine-induced activation of IκB kinase (IKK). We show that the analogous region of optineurin can functionally replace the core region of the NEMO IVD. We also show that an intact IVD is required for the formation of disulfide-bonded dimers of NEMO. Moreover, inactivating mutations in this core region abrogate the ability of NEMO to form ubiquitin-induced liquid-liquid phase separation droplets in vitro and signal-induced puncta in vivo. Thermal and chemical denaturation studies of truncated NEMO variants indicate that the IVD, while not intrinsically destabilizing, can reduce the stability of surrounding regions of NEMO due to the conflicting structural demands imparted on this region by flanking upstream and downstream domains. This conformational strain in the IVD mediates allosteric communication between the N- and C-terminal regions of NEMO. Overall, these results support a model in which the IVD of NEMO participates in signal-induced activation of the IKK/NF-κB pathway by acting as a mediator of conformational changes in NEMO.
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Affiliation(s)
| | - Anthony M DeMaria
- Department of Chemistry, Boston University, Boston, Massachusetts, USA
| | - Judy Wong
- Department of Biology, Boston University, Boston, Massachusetts, USA
| | - Wei Wang
- Department of Biology, Boston University, Boston, Massachusetts, USA
| | - Jack J Jordanides
- Department of Chemistry, Boston University, Boston, Massachusetts, USA
| | - Adrian Whitty
- Department of Chemistry, Boston University, Boston, Massachusetts, USA
| | - Karen N Allen
- Department of Chemistry, Boston University, Boston, Massachusetts, USA.
| | - Thomas D Gilmore
- Department of Biology, Boston University, Boston, Massachusetts, USA.
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4
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Mou W, Zhao Z, Gao L, Fu L, Li J, Jiao A, Peng Y, Yu T, Guo Y, Chen L, Wang H, Liu J, Qin Q, Xu B, Liu X, He J, Gui J. An Atypical Incontinentia Pigmenti Female with Persistent Mucocutaneous Hyperinflammation and Immunodeficiency Caused by a Novel Germline IKBKG Missense Mutation. J Clin Immunol 2023; 43:2165-2180. [PMID: 37831401 DOI: 10.1007/s10875-023-01564-x] [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: 11/15/2022] [Accepted: 08/02/2023] [Indexed: 10/14/2023]
Abstract
While most missense mutations of the IKBKG gene typically result in Ectodermal Dysplasia with Immunodeficiency, there have been rare reported instances of missense mutations of the IKBKG gene causing both Incontinentia Pigmenti (IP) and immunodeficiency in female patients. In this study, we described an atypical IP case in a 19-year-old girl, characterized by hyperpigmented and verrucous skin areas over the entire body. Remarkably, she experienced recurrent red papules whenever she had a feverish upper respiratory tract infection. Immunohistochemical staining unveiled a substantial accumulation of CD68+ macrophages alongside the TNF-α positive cells in the dermis tissue of new pustules, with increased apoptotic basal keratinocytes in the epidermis tissue of these lesions. Starting from the age of 8 years old, the patient suffered from severe and sustained chronic respiratory mucous membrane scar hyperplasia and occluded subglottic lumen. In addition to elevated erythrocyte sedimentation rate values, inflammatory cells were observed in the pathologic lesions of endobronchial biopsies and Bronchoalveolar Lavage Fluid (BALF) smear. Further histological analysis revealed a destructive bronchus epithelium integrity with extensive necrosis. Simultaneously, the patient experienced recurrent incomplete intestinal obstructions and lips contracture. The patient's BALF sample displayed an augmented profile of proinflammatory cytokines and chemokines, suggesting a potential link to systemic hyperinflammation, possibly underlying the pathogenic injuries affecting the subglottic, respiratory, and digestive systems. Furthermore, the patient presented with recurrent pneumonias and multiple warts accompanied by a T+BlowNKlow immunophenotype. Next generation sequencing showed that the patient carried a novel de novo germline heterozygous missense mutation in the IKBKG gene (c. 821T>C, p. L274P), located in the highly conserved CC2 domain. TA-cloning sequencing of patient's cDNA yielded 30 mutant transcripts out of 44 clones. In silico analysis indicated that the hydrogen bond present between Ala270 and Leu274 in the wild-type NEMO was disrupted by the Leu274Pro mutation. However, this mutation did not affect NEMO expression in peripheral blood mononuclear cells (PBMCs). Moreover, patient PBMCs exhibited significantly impaired TNF-α production following Lipopolysaccharide (LPS) stimulation. X-chromosome inactivation in T cells and neutrophils were not severely skewed. Reduced levels of IκBα phosphorylation and degradation in patient's PBMCs were observed. The NF-κB luciferase reporter assay conducted using IKBKG-deficient HEK293T cells revealed a significant reduction in NF-kB activity upon LPS stimulation. These findings adds to the ever-growing knowledge on female IP that might contribute to the better understanding of this challenging disorder.
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Affiliation(s)
- Wenjun Mou
- Laboratory of Tumor Immunology, Beijing Pediatric Research Institute, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, 100045, China
| | - Zhipeng Zhao
- Department of Pulmonology, Beijing Children's Hospital, Capital Medical University, National Clinical Research Center of Respiratory Diseases, National Center for Children's Health, Beijing, 100045, China
| | - Liwei Gao
- Department of Pulmonology, Beijing Children's Hospital, Capital Medical University, National Clinical Research Center of Respiratory Diseases, National Center for Children's Health, Beijing, 100045, China
| | - Libing Fu
- Department of Pathology, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, 100045, China
| | - Jia Li
- Department of Pathology, Beijing Tiantan Hospital, Capital Medical University, Beijing, 100070, China
| | - Anxia Jiao
- Department of Interventional Pulmonology, Beijing Children's Hospital, Capital Medical University, National Clinical Research Center of Respiratory Diseases, National Center for Children's Health, Beijing, 100045, China
| | - Yun Peng
- Department of Radiology, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, 100045, China
| | - Tong Yu
- Department of Radiology, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, 100045, China
| | - Yan Guo
- Department of Pulmonology, Beijing Children's Hospital, Capital Medical University, National Clinical Research Center of Respiratory Diseases, National Center for Children's Health, Beijing, 100045, China
| | - Lanqin Chen
- Department of Pulmonology, Beijing Children's Hospital, Capital Medical University, National Clinical Research Center of Respiratory Diseases, National Center for Children's Health, Beijing, 100045, China
| | - Hao Wang
- Department of Pulmonology, Beijing Children's Hospital, Capital Medical University, National Clinical Research Center of Respiratory Diseases, National Center for Children's Health, Beijing, 100045, China
| | - Jun Liu
- Department of Pulmonology, Beijing Children's Hospital, Capital Medical University, National Clinical Research Center of Respiratory Diseases, National Center for Children's Health, Beijing, 100045, China
| | - Qiang Qin
- Department of Pulmonology, Beijing Children's Hospital, Capital Medical University, National Clinical Research Center of Respiratory Diseases, National Center for Children's Health, Beijing, 100045, China
| | - Baoping Xu
- Department of Pulmonology, Beijing Children's Hospital, Capital Medical University, National Clinical Research Center of Respiratory Diseases, National Center for Children's Health, Beijing, 100045, China
| | - Xiuyun Liu
- Department of Pulmonology, Beijing Children's Hospital, Capital Medical University, National Clinical Research Center of Respiratory Diseases, National Center for Children's Health, Beijing, 100045, China.
| | - Jianxin He
- Department of Pulmonology, Beijing Children's Hospital, Capital Medical University, National Clinical Research Center of Respiratory Diseases, National Center for Children's Health, Beijing, 100045, China.
| | - Jingang Gui
- Laboratory of Tumor Immunology, Beijing Pediatric Research Institute, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, 100045, China.
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5
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Freigeh GE, Michniacki TF. NF-κB and Related Autoimmune and Autoinflammatory Diseases. Rheum Dis Clin North Am 2023; 49:805-823. [PMID: 37821197 DOI: 10.1016/j.rdc.2023.06.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/13/2023]
Abstract
The NF-κB pathway is a cardinal signaling pathway that has been implicated in the development of a diverse range of clinical diseases. Numerous cellular processes converge on this pathway, which results in cell proliferation and survival. Defects in this pathway and in its upstream regulators have been described as causing immunodeficiency. However, there is a growing body of literature connecting autoimmune and autoinflammatory conditions to NF-κB pathway dysfunction. This review serves as a current appraisal of the literature of these disorders.
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Affiliation(s)
- George E Freigeh
- Division of Allergy and Clinical Immunology, Department of Internal Medicine, University of Michigan, Lobby H Suite 2100, 24 Frank Lloyd Wright Drive, Ann Arbor, MI 48105, USA.
| | - Thomas F Michniacki
- Division of Hematology and Oncology, Department of Pediatrics, University of Michigan, 1522 Simpson Road East, Ann Arbor, MI 48109, USA
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Lin Y, Sheng M, Qin H, Zhang P, Wang C, Fu W, Meng X, Wang D, Hou Y. Caspase 6 promotes innate immune activation by functional crosstalk between RIPK1-IκBα axis in liver inflammation. Cell Commun Signal 2023; 21:282. [PMID: 37828624 PMCID: PMC10568785 DOI: 10.1186/s12964-023-01287-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2023] [Accepted: 08/19/2023] [Indexed: 10/14/2023] Open
Abstract
BACKGROUND Caspase 6 is an essential regulator in innate immunity, inflammasome activation and host defense. We aimed to characterize the causal mechanism of Caspase 6 in liver sterile inflammatory injury. METHODS Human liver tissues were harvested from patients undergoing ischemia-related hepatectomy to evaluate Caspase 6 expression. Subsequently, we created Caspase 6-knockout (Caspase 6KO) mice to analyze roles and molecular mechanisms of macrophage Caspase 6 in murine models of liver ischemia/reperfusion (IR) injury. RESULTS In human liver biopsies, Caspase 6 expression was positively correlated with more severe histopathological injury and higher serum ALT/AST level at one day postoperatively. Moreover, Caspase 6 was mainly elevated in macrophages but not hepatocytes in ischemic livers. Unlike in controls, the Caspase 6-deficient livers were protected against IR injury, as evidenced by inhibition of inflammation, oxidative stress and iron overload. Disruption of macrophage NF-κB essential modulator (NEMO) in Caspase 6-deficient livers deteriorated liver inflammation and ferroptosis. Mechanistically, Caspase 6 deficiency spurred NEMO-mediated IκBα phosphorylation in macrophage. Then phosphorylated-inhibitor of NF-κBα (p-IκBα) co-localized with receptor-interacting serine/ threonine-protein kinase 1 (RIPK1) in the cytoplasm to degradate RIPK1 under inflammatory conditions. The disruption of RIPK1-IκBα interaction preserved RIPK1 degradation, triggering downstream apoptosis signal-regulating kinase 1 (ASK1) phosphorylation and inciting NIMA-related kinase 7/NOD-like receptor family pyrin domain containing 3 (NEK7/NLRP3) activation in macrophages. Moreover, ablation of macrophage RIPK1 or ASK1 diminished NEK7/NLRP3-driven inflammatory response and dampened hepatocyte ferroptosis by reducing HMGB1 release from macrophages. CONCLUSIONS Our findings underscore a novel mechanism of Caspase 6 mediated RIPK1-IκBα interaction in regulating macrophage NEK7/NLRP3 function and hepatocytes ferroptosis, which provides therapeutic targets for clinical liver IR injury. Video Abstract.
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Affiliation(s)
- Yuanbang Lin
- Department of General Surgery, Tianjin Medical University General Hospital, Anshan Road NO. 154, Tianjin, 300052, PR China, China.
| | - Mingwei Sheng
- Department of Anesthesiology, Tianjin First Central Hospital, Tianjin, China
| | - Hua Qin
- College of Life Sciences, Nankai University, Tianjin, 300071, China
| | - Peng Zhang
- Department of General Surgery, Tianjin Medical University General Hospital, Anshan Road NO. 154, Tianjin, 300052, PR China, China
| | - Chunli Wang
- Department of General Surgery, Tianjin Medical University General Hospital, Anshan Road NO. 154, Tianjin, 300052, PR China, China
| | - Wei Fu
- Department of General Surgery, Tianjin Medical University General Hospital, Anshan Road NO. 154, Tianjin, 300052, PR China, China
| | - Xiangjun Meng
- Department of General Surgery, Tianjin Medical University General Hospital, Anshan Road NO. 154, Tianjin, 300052, PR China, China
| | - Duowei Wang
- Department of General Surgery, Tianjin Medical University General Hospital, Anshan Road NO. 154, Tianjin, 300052, PR China, China
| | - Yachao Hou
- Department of General Surgery, Tianjin Medical University General Hospital, Anshan Road NO. 154, Tianjin, 300052, PR China, China
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7
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Meng Y, Yang Z, Quan Y, Zhao S, Zhang L, Yang L. Regulation of IkappaB Protein Expression by Early Gestation in the Thymus of Ewes. Vet Sci 2023; 10:462. [PMID: 37505866 PMCID: PMC10384501 DOI: 10.3390/vetsci10070462] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2023] [Revised: 07/01/2023] [Accepted: 07/11/2023] [Indexed: 07/29/2023] Open
Abstract
The thymus is an essential component of maternal immune systems that play key roles in recognizing the placenta as immunologically foreign. The inhibitor of the NF-κB (IκB) family has essential effects on the NF-κB pathway; however, it is unclear whether early pregnancy modulates the expression of the IκB family in the thymus. In this study, maternal thymuses were sampled on day 16 of nonpregnancy and different gestation stages in the ovine, and the expression of IκB proteins was analyzed. The data showed that B cell leukemia-3 and IκBβ increased; however, IκBα, IκBε, and IKKγ deceased during gestation. Furthermore, there was an increase in IκBNS and IκBζ expression values on day 13 of pregnancy; however, this decreased on day 25 of gestation. In summary, the expression of the IκB family was modulated in the thymus during early gestation, suggesting that the maternal thymus can be associated with maternal immunologic tolerance and pregnancy establishment in ewes.
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Affiliation(s)
- Yao Meng
- School of Life Sciences and Food Engineering, Hebei University of Engineering, Handan 056038, China
| | - Zhen Yang
- School of Life Sciences and Food Engineering, Hebei University of Engineering, Handan 056038, China
| | - Yaodong Quan
- School of Life Sciences and Food Engineering, Hebei University of Engineering, Handan 056038, China
| | - Shuxin Zhao
- School of Life Sciences and Food Engineering, Hebei University of Engineering, Handan 056038, China
| | - Leying Zhang
- School of Life Sciences and Food Engineering, Hebei University of Engineering, Handan 056038, China
| | - Ling Yang
- School of Life Sciences and Food Engineering, Hebei University of Engineering, Handan 056038, China
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8
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DiRusso CJ, DeMaria AM, Wong J, Jordanides JJ, Whitty A, Allen KN, Gilmore TD. A Conserved Core Region of the Scaffold NEMO is Essential for Signal-induced Conformational Change and Liquid-liquid Phase Separation. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.05.25.542299. [PMID: 37292615 PMCID: PMC10245932 DOI: 10.1101/2023.05.25.542299] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Scaffold proteins help mediate interactions between protein partners, often to optimize intracellular signaling. Herein, we use comparative, biochemical, biophysical, molecular, and cellular approaches to investigate how the scaffold protein NEMO contributes to signaling in the NF-κB pathway. Comparison of NEMO and the related protein optineurin from a variety of evolutionarily distant organisms revealed that a central region of NEMO, called the Intervening Domain (IVD), is conserved between NEMO and optineurin. Previous studies have shown that this central core region of the IVD is required for cytokine-induced activation of IκB kinase (IKK). We show that the analogous region of optineurin can functionally replace the core region of the NEMO IVD. We also show that an intact IVD is required for the formation of disulfide-bonded dimers of NEMO. Moreover, inactivating mutations in this core region abrogate the ability of NEMO to form ubiquitin-induced liquid-liquid phase separation droplets in vitro and signal-induced puncta in vivo. Thermal and chemical denaturation studies of truncated NEMO variants indicate that the IVD, while not intrinsically destabilizing, can reduce the stability of surrounding regions of NEMO, due to the conflicting structural demands imparted on this region by flanking upstream and downstream domains. This conformational strain in the IVD mediates allosteric communication between N- and C-terminal regions of NEMO. Overall, these results support a model in which the IVD of NEMO participates in signal-induced activation of the IKK/NF-κB pathway by acting as a mediator of conformational changes in NEMO.
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Affiliation(s)
| | | | - Judy Wong
- Department of Biology, Boston University, Boston, MA 02215, USA
| | | | - Adrian Whitty
- Department of Chemistry, Boston University, Boston, MA 02215, USA
| | - Karen N. Allen
- Department of Chemistry, Boston University, Boston, MA 02215, USA
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9
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Goel S, Oliva R, Jeganathan S, Bader V, Krause LJ, Kriegler S, Stender ID, Christine CW, Nakamura K, Hoffmann JE, Winter R, Tatzelt J, Winklhofer KF. Linear ubiquitination induces NEMO phase separation to activate NF-κB signaling. Life Sci Alliance 2023; 6:e202201607. [PMID: 36720498 PMCID: PMC9889916 DOI: 10.26508/lsa.202201607] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2022] [Revised: 01/09/2023] [Accepted: 01/09/2023] [Indexed: 02/02/2023] Open
Abstract
The NF-κB essential modulator NEMO is the core regulatory component of the inhibitor of κB kinase complex, which is a critical checkpoint in canonical NF-κB signaling downstream of innate and adaptive immune receptors. In response to various stimuli, such as TNF or IL-1β, NEMO binds to linear or M1-linked ubiquitin chains generated by LUBAC, promoting its oligomerization and subsequent activation of the associated kinases. Here we show that M1-ubiquitin chains induce phase separation of NEMO and the formation of NEMO assemblies in cells after exposure to IL-1β. Phase separation is promoted by both binding of NEMO to linear ubiquitin chains and covalent linkage of M1-ubiquitin to NEMO and is essential but not sufficient for its phase separation. Supporting the functional relevance of NEMO phase separation in signaling, a pathogenic NEMO mutant, which is impaired in both binding and linkage to linear ubiquitin chains, does not undergo phase separation and is defective in mediating IL-1β-induced NF-κB activation.
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Affiliation(s)
- Simran Goel
- Department Molecular Cell Biology, Institute of Biochemistry and Pathobiochemistry, Ruhr University Bochum, Bochum, Germany
| | - Rosario Oliva
- Physical Chemistry I-Biophysical Chemistry, Department of Chemistry and Chemical Biology, TU Dortmund University, Dortmund, Germany
- Department of Chemical Sciences, University of Naples Federico II, Naples, Italy
| | - Sadasivam Jeganathan
- Department Molecular Cell Biology, Institute of Biochemistry and Pathobiochemistry, Ruhr University Bochum, Bochum, Germany
| | - Verian Bader
- Department Molecular Cell Biology, Institute of Biochemistry and Pathobiochemistry, Ruhr University Bochum, Bochum, Germany
- Department Biochemistry of Neurodegenerative Diseases, Institute of Biochemistry and Pathobiochemistry, Ruhr University Bochum, Bochum, Germany
| | - Laura J Krause
- Department Molecular Cell Biology, Institute of Biochemistry and Pathobiochemistry, Ruhr University Bochum, Bochum, Germany
- RESOLV Cluster of Excellence, Ruhr University Bochum, Bochum, Germany
| | - Simon Kriegler
- Physical Chemistry I-Biophysical Chemistry, Department of Chemistry and Chemical Biology, TU Dortmund University, Dortmund, Germany
| | - Isabelle D Stender
- Protein Chemistry Facility, Max Planck Institute of Molecular Physiology, Dortmund, Germany
| | | | - Ken Nakamura
- Department of Neurology, UCSF, San Francisco, CA, USA
- Gladstone Institute of Neurological Disease, Gladstone Institutes, San Francisco, CA, USA
| | - Jan-Erik Hoffmann
- Protein Chemistry Facility, Max Planck Institute of Molecular Physiology, Dortmund, Germany
| | - Roland Winter
- Physical Chemistry I-Biophysical Chemistry, Department of Chemistry and Chemical Biology, TU Dortmund University, Dortmund, Germany
- RESOLV Cluster of Excellence, Ruhr University Bochum, Bochum, Germany
| | - Jörg Tatzelt
- RESOLV Cluster of Excellence, Ruhr University Bochum, Bochum, Germany
- Department Biochemistry of Neurodegenerative Diseases, Institute of Biochemistry and Pathobiochemistry, Ruhr University Bochum, Bochum, Germany
| | - Konstanze F Winklhofer
- Department Molecular Cell Biology, Institute of Biochemistry and Pathobiochemistry, Ruhr University Bochum, Bochum, Germany
- RESOLV Cluster of Excellence, Ruhr University Bochum, Bochum, Germany
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10
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Fernandes J, Uppal K, Liu KH, Hu X, Orr M, Tran V, Go YM, Jones DP. Antagonistic Interactions in Mitochondria ROS Signaling Responses to Manganese. Antioxidants (Basel) 2023; 12:804. [PMID: 37107179 PMCID: PMC10134992 DOI: 10.3390/antiox12040804] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Revised: 03/17/2023] [Accepted: 03/21/2023] [Indexed: 03/29/2023] Open
Abstract
Antagonistic interaction refers to opposing beneficial and adverse signaling by a single agent. Understanding opposing signaling is important because pathologic outcomes can result from adverse causative agents or the failure of beneficial mechanisms. To test for opposing responses at a systems level, we used a transcriptome-metabolome-wide association study (TMWAS) with the rationale that metabolite changes provide a phenotypic readout of gene expression, and gene expression provides a phenotypic readout of signaling metabolites. We incorporated measures of mitochondrial oxidative stress (mtOx) and oxygen consumption rate (mtOCR) with TMWAS of cells with varied manganese (Mn) concentration and found that adverse neuroinflammatory signaling and fatty acid metabolism were connected to mtOx, while beneficial ion transport and neurotransmitter metabolism were connected to mtOCR. Each community contained opposing transcriptome-metabolome interactions, which were linked to biologic functions. The results show that antagonistic interaction is a generalized cell systems response to mitochondrial ROS signaling.
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Affiliation(s)
- Jolyn Fernandes
- Section of Neonatal-Perinatal Medicine, Department of Pediatrics, College of Medicine, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA;
- Division of Pulmonary, Allergy, Critical Care and Sleep Medicine, Department of Medicine, Emory University, Atlanta, GA 30322, USA
| | - Karan Uppal
- Division of Pulmonary, Allergy, Critical Care and Sleep Medicine, Department of Medicine, Emory University, Atlanta, GA 30322, USA
| | - Ken H. Liu
- Division of Pulmonary, Allergy, Critical Care and Sleep Medicine, Department of Medicine, Emory University, Atlanta, GA 30322, USA
| | - Xin Hu
- Division of Pulmonary, Allergy, Critical Care and Sleep Medicine, Department of Medicine, Emory University, Atlanta, GA 30322, USA
| | - Michael Orr
- Division of Pulmonary, Allergy, Critical Care and Sleep Medicine, Department of Medicine, Emory University, Atlanta, GA 30322, USA
| | - ViLinh Tran
- Division of Pulmonary, Allergy, Critical Care and Sleep Medicine, Department of Medicine, Emory University, Atlanta, GA 30322, USA
| | - Young-Mi Go
- Division of Pulmonary, Allergy, Critical Care and Sleep Medicine, Department of Medicine, Emory University, Atlanta, GA 30322, USA
| | - Dean P. Jones
- Division of Pulmonary, Allergy, Critical Care and Sleep Medicine, Department of Medicine, Emory University, Atlanta, GA 30322, USA
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11
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Tan Q, Yao CL. NEMO involves in NF-κB activation by interaction with p65 and promoting its nuclear translocation in large yellow croaker (Larimichthys crocea). FISH & SHELLFISH IMMUNOLOGY 2023; 134:108637. [PMID: 36841517 DOI: 10.1016/j.fsi.2023.108637] [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: 12/15/2022] [Revised: 02/10/2023] [Accepted: 02/22/2023] [Indexed: 06/18/2023]
Abstract
NEMO (nuclear factor-κB <NF-κB> essential modulator) plays an important role in activating NF-κB signaling pathway, p65 is a pivotal positive-regulator of NF-κB family. However, the role of NEMO in p65-triggered immune activation in teleost is largely unknown. In the present study, the cDNA sequence of LcNEMO was identified from the large yellow croaker (Larimichthys crocea). The predicated LcNEMO protein encoded 565 amino acids, consisting of a N-terminal NEMO domain, followed by two coiled coil (CC) motifs, a CC2-leucine zipper (CC2-LZ) domain, and a C-terminal zinc finger (ZnF) domain. Quantitative PCR showed that the strongest constitutive expression of LcNEMO was detected in blood and the inductive expression of it significantly enhanced after LPS and poly I:C challenge. The effect of LcNEMO on p65, RelB and cRel associated-immune activation detected by dual-luciferase reporter system assay indicated that Lcp65-triggered NF-κB, TNF-α and IL-1β activation could be significantly enhanced by LcNEMO. Furthermore, Co-IP revealed that the protein-protein interaction was existed between LcNEMO and Lcp65. Western blot and confocal microscope observation displayed that Lcp65 nuclear translocation could be promoted by LcNEMO with a dose- and time-dependent manner, which was further verified by RNA interference of LcNEMO expression. Our findings suggest that LcNEMO may be crucial in immune response by promoting p65-mediated immune activation.
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Affiliation(s)
- Qing Tan
- Fisheries College, Jimei University, Xiamen, 361021, PR China
| | - Cui-Luan Yao
- Fisheries College, Jimei University, Xiamen, 361021, PR China.
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12
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Zhang J, Ning J, Fu W, Shi Y, Zhang J, Ding S. CMTM3 protects the gastric epithelial cells from apoptosis and promotes IL-8 by stabilizing NEMO during Helicobacter pylori infection. Gut Pathog 2023; 15:6. [PMID: 36782312 PMCID: PMC9924195 DOI: 10.1186/s13099-023-00533-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Accepted: 02/06/2023] [Indexed: 02/15/2023] Open
Abstract
BACKGROUND CKLF-like MARVEL transmembrane domain containing 3 (CMTM3) plays an important role in cancer development. Although Helicobacter pylori (H. pylori) infection is a main cause of gastric cancer, the function of CMTM3 during H. pylori infection remains unclear. CMTM3 expression levels in tissues from H. pylori-infected patients and cells co-cultured with H. pylori were analyzed. qRT-PCR and ELISA were used to investigate the effects of CMTM3 on interleukin 8 (IL-8) expression. Annexin V/propidium iodide staining was performed to evaluate the function of CMTM3 in the apoptosis of gastric epithelial cells. Proteomic analysis was performed to explore the underlying mechanism of CMTM3 during H. pylori infection. The interaction between CMTM3 and NEMO was determined via co-immunoprecipitation, HA-ubiquitin pull-down assay, and immunofluorescence. RESULTS H. pylori induced a significant increase in CMTM3 expression. CMTM3 inhibited gastric mucosal epithelial cells from apoptosis and increased the expression level of IL-8 during H. pylori infection. KEGG pathway enrichment analysis revealed that differentially expressed proteins were involved in epithelial cell signaling in H. pylori infection. CMTM3 directly interacted with NEMO, which promoted protein stabilization by down-regulation of its ubiquitylation. CONCLUSIONS CMTM3 reduces apoptosis and promotes IL-8 expression in the gastric epithelial cells by stabilizing NEMO during H. pylori infection. These findings characterize a new role for CMTM3 in host-pathogen interactions and provide novel insight into the molecular regulation of NEMO.
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Affiliation(s)
- Jing Zhang
- grid.411642.40000 0004 0605 3760Department of Gastroenterology, Peking University Third Hospital, 49 Huayuan North Road, Haidian District, Beijing, 100191 People’s Republic of China
| | - Jing Ning
- grid.411642.40000 0004 0605 3760Department of Gastroenterology, Peking University Third Hospital, 49 Huayuan North Road, Haidian District, Beijing, 100191 People’s Republic of China
| | - Weiwei Fu
- grid.411642.40000 0004 0605 3760Department of Gastroenterology, Peking University Third Hospital, 49 Huayuan North Road, Haidian District, Beijing, 100191 People’s Republic of China
| | - Yanyan Shi
- grid.411642.40000 0004 0605 3760Research Center of Clinical Epidemiology, Peking University Third Hospital, 49 Huayuan North Road, Haidian District, Beijing, 100191 People’s Republic of China
| | - Jing Zhang
- grid.411642.40000 0004 0605 3760Department of Gastroenterology, Peking University Third Hospital, 49 Huayuan North Road, Haidian District, Beijing, 100191 People’s Republic of China
| | - Shigang Ding
- Department of Gastroenterology, Peking University Third Hospital, 49 Huayuan North Road, Haidian District, Beijing, 100191, People's Republic of China.
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13
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Dai J, Zhou P, Li S, Qiu HJ. New Insights into the Crosstalk among the Interferon and Inflammatory Signaling Pathways in Response to Viral Infections: Defense or Homeostasis. Viruses 2022; 14:v14122798. [PMID: 36560803 PMCID: PMC9783938 DOI: 10.3390/v14122798] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Revised: 12/07/2022] [Accepted: 12/12/2022] [Indexed: 12/23/2022] Open
Abstract
Innate immunity plays critical roles in eliminating viral infections, healing an injury, and restoring tissue homeostasis. The signaling pathways of innate immunity, including interferons (IFNs), nuclear factor kappa B (NF-κB), and inflammasome responses, are activated upon viral infections. Crosstalk and interplay among signaling pathways are involved in the complex regulation of antiviral activity and homeostasis. To date, accumulating evidence has demonstrated that NF-κB or inflammasome signaling exhibits regulatory effects on IFN signaling. In addition, several adaptors participate in the crosstalk between IFNs and the inflammatory response. Furthermore, the key adaptors in innate immune signaling pathways or the downstream cytokines can modulate the activation of other signaling pathways, leading to excessive inflammatory responses or insufficient antiviral effects, which further results in tissue injury. This review focuses on the crosstalk between IFN and inflammatory signaling to regulate defense and homeostasis. A deeper understanding of the functional aspects of the crosstalk of innate immunity facilitates the development of targeted treatments for imbalanced homeostasis.
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Affiliation(s)
- Jingwen Dai
- State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin 150069, China
| | - Pingping Zhou
- State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin 150069, China
- Department of Immunology, School of Basic Medicine, Harbin Medical University, Harbin 150081, China
| | - Su Li
- State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin 150069, China
- Correspondence: (S.L.); (H.-J.Q.)
| | - Hua-Ji Qiu
- State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin 150069, China
- Correspondence: (S.L.); (H.-J.Q.)
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14
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Recent advances in the pharmacological targeting of ubiquitin-regulating enzymes in cancer. Semin Cell Dev Biol 2022; 132:213-229. [PMID: 35184940 DOI: 10.1016/j.semcdb.2022.02.007] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2021] [Revised: 02/04/2022] [Accepted: 02/07/2022] [Indexed: 12/15/2022]
Abstract
As a post-translational modification that has pivotal roles in protein degradation, ubiquitination ensures that intracellular proteins act in a precise spatial and temporal manner to regulate diversified cellular processes. Perturbation of the ubiquitin system contributes directly to the onset and progression of a wide variety of diseases, including various subtypes of cancer. This highly regulated system has been for years an active research area for drug discovery that is exemplified by several approved drugs. In this review, we will provide an update of the main breakthrough scientific discoveries that have been leading the clinical development of ubiquitin-targeting therapies in the last decade, with a special focus on E1 and E3 modulators. We will further discuss the unique challenges of identifying new potential therapeutic targets within this ubiquitous and highly complex machinery, based on available crystallographic structures, and explore chemical approaches by which these challenges might be met.
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15
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DiRusso CJ, Dashtiahangar M, Gilmore TD. Scaffold proteins as dynamic integrators of biological processes. J Biol Chem 2022; 298:102628. [PMID: 36273588 PMCID: PMC9672449 DOI: 10.1016/j.jbc.2022.102628] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2022] [Revised: 10/14/2022] [Accepted: 10/15/2022] [Indexed: 11/15/2022] Open
Abstract
Scaffold proteins act as molecular hubs for the docking of multiple proteins to organize efficient functional units for signaling cascades. Over 300 human proteins have been characterized as scaffolds, acting in a variety of signaling pathways. While the term scaffold implies a static, supportive platform, it is now clear that scaffolds are not simply inert docking stations but can undergo conformational changes that affect their dependent signaling pathways. In this review, we catalog scaffold proteins that have been shown to undergo actionable conformational changes, with a focus on the role that conformational change plays in the activity of the classic yeast scaffold STE5, as well as three human scaffold proteins (KSR, NEMO, SHANK3) that are integral to well-known signaling pathways (RAS, NF-κB, postsynaptic density). We also discuss scaffold protein conformational changes vis-à-vis liquid-liquid phase separation. Changes in scaffold structure have also been implicated in human disease, and we discuss how aberrant conformational changes may be involved in disease-related dysregulation of scaffold and signaling functions. Finally, we discuss how understanding these conformational dynamics will provide insight into the flexibility of signaling cascades and may enhance our ability to treat scaffold-associated diseases.
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16
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Huang N, Dong H, Shao B. Phase separation in immune regulation and immune-related diseases. J Mol Med (Berl) 2022; 100:1427-1440. [PMID: 36085373 PMCID: PMC9462646 DOI: 10.1007/s00109-022-02253-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2022] [Revised: 08/26/2022] [Accepted: 08/31/2022] [Indexed: 11/28/2022]
Abstract
Phase separation is an emerging paradigm for understanding the biochemical interactions between proteins, DNA, and RNA. Research over the past decade has provided mounting evidence that phase separation modulates a great variety of cellular activities. Particularly, phase separation is directly relevant to immune signaling, immune cells, and immune-related diseases like cancer, neurodegenerative diseases, and even SARS-CoV-2. In this review, we summarized current knowledge of phase separation in immunology and emerging findings related to immune responses as they enable possible treatment approaches.
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Affiliation(s)
- Ning Huang
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases and State Key Laboratory of Biotherapy, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China
| | - Hao Dong
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases and State Key Laboratory of Biotherapy, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China
| | - Bin Shao
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases and State Key Laboratory of Biotherapy, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China.
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17
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Bai ZQ, Ma X, Liu B, Huang T, Hu K. Solution structure of c-FLIP death effector domains. Biochem Biophys Res Commun 2022; 617:1-6. [PMID: 35688044 DOI: 10.1016/j.bbrc.2022.05.086] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2022] [Accepted: 05/27/2022] [Indexed: 11/28/2022]
Abstract
The formation of death-inducing signaling complex (DISC) and death effector domain (DED) filament initiates extrinsic apoptosis. Recruitment and activation of procaspase-8 at the DISC are regulated by c-FLIP. The interaction between c-FLIP and procaspase-8 is mediated by their tandem DEDs (tDED). However, the structure of c-FLIPtDED and how c-FLIP interferes with procaspase-8 activation at the DISC remain elusive. Here, we solved the monomeric structure of c-FLIPtDED (F114G) at near physiological pH by solution nuclear magnetic resonance (NMR). Structural superimposition reveals c-FLIPtDED (F114G) adopts a structural topology similar to that of procaspase-8tDED. Our results provide a structural basis for understanding how c-FLIP interacts with procaspase-8 and the molecular mechanisms of c-FLIP in regulating cell death.
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Affiliation(s)
- Zhi-Qiang Bai
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, 132 Lanhei Road, Heilongtan, Kunming, 650201, Yunnan, China; Innovative Institute of Chinese Medicine and Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Xiaofang Ma
- Innovative Institute of Chinese Medicine and Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, China
| | - Bin Liu
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, 132 Lanhei Road, Heilongtan, Kunming, 650201, Yunnan, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Tao Huang
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, 132 Lanhei Road, Heilongtan, Kunming, 650201, Yunnan, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Kaifeng Hu
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, 132 Lanhei Road, Heilongtan, Kunming, 650201, Yunnan, China; Innovative Institute of Chinese Medicine and Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, China.
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18
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Bagnéris C, Senthil Kumar SL, Baratchian M, Britt HM, Assafa TE, Thalassinos K, Collins MK, Barrett TE. Mechanistic insights into the activation of the IKK kinase complex by the Kaposi's Sarcoma Herpes virus oncoprotein vFLIP. J Biol Chem 2022; 298:102012. [PMID: 35525271 PMCID: PMC9163697 DOI: 10.1016/j.jbc.2022.102012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2021] [Revised: 04/27/2022] [Accepted: 04/28/2022] [Indexed: 11/23/2022] Open
Abstract
Constitutive activation of the canonical NF-κB signaling pathway is a major factor in Kaposi’s sarcoma-associated herpes virus pathogenesis where it is essential for the survival of primary effusion lymphoma. Central to this process is persistent upregulation of the inhibitor of κB kinase (IKK) complex by the virally encoded oncoprotein vFLIP. Although the physical interaction between vFLIP and the IKK kinase regulatory component essential for persistent activation, IKKγ, has been well characterized, it remains unclear how the kinase subunits are rendered active mechanistically. Using a combination of cell-based assays, biophysical techniques, and structural biology, we demonstrate here that vFLIP alone is sufficient to activate the IKK kinase complex. Furthermore, we identify weakly stabilized, high molecular weight vFLIP–IKKγ assemblies that are key to the activation process. Taken together, our results are the first to reveal that vFLIP-induced NF-κB activation pivots on the formation of structurally specific vFLIP–IKKγ multimers which have an important role in rendering the kinase subunits active through a process of autophosphorylation. This mechanism of NF-κB activation is in contrast to those utilized by endogenous cytokines and cellular FLIP homologues.
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Affiliation(s)
- Claire Bagnéris
- Department of Biological Sciences, Institute of Structural Molecular Biology, Birkbeck College, London, UK
| | - Swathi L Senthil Kumar
- Department of Biological Sciences, Institute of Structural Molecular Biology, Birkbeck College, London, UK
| | - Mehdi Baratchian
- Genitourinary Malignancies Research Center, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, USA
| | - Hannah M Britt
- Division of Biosciences, Institute of Structural and Molecular Biology, University College London, London, UK
| | - Tufa E Assafa
- Chemistry and Biochemistry Department, University of California Santa Cruz, Santa Cruz, California, USA
| | - Konstantinos Thalassinos
- Department of Biological Sciences, Institute of Structural Molecular Biology, Birkbeck College, London, UK; Division of Biosciences, Institute of Structural and Molecular Biology, University College London, London, UK
| | - Mary K Collins
- Okinawa Institute of Science and Technology, Graduate University, Onna-son, Okinawa, Japan
| | - Tracey E Barrett
- Department of Biological Sciences, Institute of Structural Molecular Biology, Birkbeck College, London, UK.
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19
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Du M, Ea CK, Fang Y, Chen ZJ. Liquid phase separation of NEMO induced by polyubiquitin chains activates NF-κB. Mol Cell 2022; 82:2415-2426.e5. [PMID: 35477005 PMCID: PMC9402427 DOI: 10.1016/j.molcel.2022.03.037] [Citation(s) in RCA: 33] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2021] [Revised: 02/03/2022] [Accepted: 03/29/2022] [Indexed: 11/15/2022]
Abstract
The NF-κB essential modulator (NEMO) is a regulatory subunit of the IκB kinase (IKK) complex that phosphorylates the NF-κB inhibitors IκBs. NEMO mediates IKK activation by binding to polyubiquitin chains (polyUb). Here we show that Lys63(K63)-linked or linear polyUb binding to NEMO robustly induced the formation of liquid-like droplets in which IKK was activated. This liquid phase separation of NEMO was driven by multivalent interactions between NEMO and polyUb. Both the NEMO-ubiquitin-binding (NUB) domain and the zinc finger (ZF) domain of NEMO mediated binding to polyUb and contributed to NEMO phase separation and IKK activation in cells. Moreover, NEMO mutations associated with human immunodeficiency impaired its phase separation. These results demonstrate that polyUb activates IKK and NF-κB signaling by promoting the phase separation of NEMO.
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Affiliation(s)
- Mingjian Du
- Department of Molecular Biology, University of Texas Southwestern Medical Center, Dallas, TX 75390-9148, USA; Center for Inflammation Research, University of Texas Southwestern Medical Center, Dallas, TX 75390-9148, USA
| | - Chee-Kwee Ea
- Department of Molecular Biology, University of Texas Southwestern Medical Center, Dallas, TX 75390-9148, USA; Center for Inflammation Research, University of Texas Southwestern Medical Center, Dallas, TX 75390-9148, USA
| | - Yan Fang
- Department of Molecular Biology, University of Texas Southwestern Medical Center, Dallas, TX 75390-9148, USA; Center for Inflammation Research, University of Texas Southwestern Medical Center, Dallas, TX 75390-9148, USA
| | - Zhijian J Chen
- Department of Molecular Biology, University of Texas Southwestern Medical Center, Dallas, TX 75390-9148, USA; Center for Inflammation Research, University of Texas Southwestern Medical Center, Dallas, TX 75390-9148, USA; Howard Hughes Medical Institute, 4000 Jones Bridge Rd., Chevy Chase, MD 20815-6789.
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20
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I226R Protein of African Swine Fever Virus Is a Suppressor of Innate Antiviral Responses. Viruses 2022; 14:v14030575. [PMID: 35336982 PMCID: PMC8951476 DOI: 10.3390/v14030575] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2022] [Revised: 03/03/2022] [Accepted: 03/04/2022] [Indexed: 12/14/2022] Open
Abstract
African swine fever is one of the most devastating swine diseases caused by African swine fever virus (ASFV). Although ASFV encodes more than 160 viral proteins, the implication of a majority of ASFV proteins in regulating host immunity is yet to be explored, and the mechanisms of immune evasion by ASFV proteins are largely unknown. Here, we report that the I226R protein of ASFV significantly suppressed innate immune responses. The ectopic expression of ASFV I226R in 293T cells significantly inhibited the activation of interferon-stimulated response element promoters triggered by Sendai virus (SeV), poly(I:C), or cyclic GMP-AMP synthase (cGAS)/STING. The I226R protein caused a significant decrease in the expression of interferons and interferon-stimulating genes in cells infected with SeV. Similar results were obtained from experiments using I226R-overexpressed PK15 and 3D4/21 cells stimulated with vesicular stomatitis virus. We observed that I226R inhibited the activation of both nuclear factor-kappa B (NF-κB) and interferon regulatory factor 3 (IRF3). Furthermore, it was shown that overexpression of I226R suppressed IRF3 activation and caused the degradation of NF-κB essential modulator (NEMO) protein. The I226R-induced NEMO degradation could be prevented by treatment with MG132, a proteasome inhibitor. Together, these results reveal that the ASFV I226R protein impairs antiviral responses, likely through multiple mechanisms including the suppression of NF-κB and IRF3 activation, to counteract innate immune responses during the viral infection.
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21
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Lin B, Goldbach-Mansky R. Pathogenic insights from genetic causes of autoinflammatory inflammasomopathies and interferonopathies. J Allergy Clin Immunol 2022; 149:819-832. [PMID: 34893352 PMCID: PMC8901451 DOI: 10.1016/j.jaci.2021.10.027] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Revised: 08/31/2021] [Accepted: 10/06/2021] [Indexed: 12/22/2022]
Abstract
A number of systemic autoinflammatory diseases arise from gain-of-function mutations in genes encoding IL-1-activating inflammasomes or cytoplasmic nucleic acid sensors including the receptor and sensor STING and result in increased IL-1 and type I interferon production, respectively. Blocking these pathways in human diseases has provided proof-of-concept, confirming the prominent roles of these cytokines in disease pathogenesis. Recent insights into the multilayered regulation of these sensor pathways and insights into their role in amplifying the disease pathogenesis of monogenic and complex genetic diseases spurred new drug development targeting the sensors. This review provides insights into the pathogenesis and genetic causes of these "prototypic" diseases caused by gain-of function mutations in IL-1-activating inflammasomes (inflammasomopathies) and in interferon-activating pathways (interferonopathies) including STING-associated vasculopathy with onset in infancy, Aicardi-Goutieres syndrome, and proteasome-associated autoinflammatory syndromes that link activation of the viral sensors STING, "self" nucleic acid metabolism, and the ubiquitin-proteasome system to "type I interferon production" and human diseases. Clinical responses and biomarker changes to Janus kinase inhibitors confirm a role of interferons, and a growing number of diseases with "interferon signatures" unveil extensive cross-talk between major inflammatory pathways. Understanding these interactions promises new tools in tackling the significant clinical challenges in treating patients with these conditions.
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Affiliation(s)
- Bin Lin
- Translational Autoinflammatory Diseases Section, Laboratory of Clinical Immunology and Microbiology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Md.
| | - Raphaela Goldbach-Mansky
- Translational Autoinflammatory Diseases Section, Laboratory of Clinical Immunology and Microbiology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Md.
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22
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Inaba S, Aizawa Y, Miwa Y, Imai C, Ohnishi H, Kanegane H, Saitoh A. Case Report: Analysis of Preserved Umbilical Cord Clarified X-Linked Anhidrotic Ectodermal Dysplasia With Immunodeficiency in Deceased, Undiagnosed Uncles. Front Immunol 2022; 12:786164. [PMID: 35003103 PMCID: PMC8727435 DOI: 10.3389/fimmu.2021.786164] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Accepted: 12/03/2021] [Indexed: 01/20/2023] Open
Abstract
Family history is one key in diagnosing inborn errors of immunity (IEI); however, disease status is difficult to determine in deceased relatives. X-linked anhidrotic ectodermal dysplasia with immunodeficiency is one of the hyper IgM syndromes that is caused by a hypomorphic variant in the nuclear factor kappa beta essential modulator. We identified a novel IKBKG variant in a 7-month-old boy with pneumococcal rib osteomyelitis and later found that his mother has incontinentia pigmenti. Genetic analysis of preserved umbilical cords revealed the same variant in two of his deceased maternal uncles. Analysis of preserved umbilical cord tissue from deceased relatives can provide important information for diagnosing IEI in their descendants.
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Affiliation(s)
- Satoshi Inaba
- Department of Pediatrics, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - Yuta Aizawa
- Department of Pediatrics, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan.,Institute for Research Promotion, Niigata University, Niigata, Japan
| | - Yuki Miwa
- Department of Pediatrics, Graduate School of Medicine, Gifu University, Gifu, Japan
| | - Chihaya Imai
- Department of Pediatrics, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - Hidenori Ohnishi
- Department of Pediatrics, Graduate School of Medicine, Gifu University, Gifu, Japan
| | - Hirokazu Kanegane
- Department of Child Health and Development, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Akihiko Saitoh
- Department of Pediatrics, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
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23
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Tegtmeyer N, Soltan Esmaeili D, Sharafutdinov I, Knorr J, Naumann M, Alter T, Backert S. Importance of cortactin for efficient epithelial NF-ĸB activation by Helicobacter pylori, Salmonella enterica and Pseudomonas aeruginosa, but not Campylobacter spp. Eur J Microbiol Immunol (Bp) 2022; 11:95-103. [PMID: 35060920 PMCID: PMC8830411 DOI: 10.1556/1886.2021.00023] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2021] [Accepted: 12/27/2021] [Indexed: 12/17/2022] Open
Abstract
Abstract
Transcription factors of the nuclear factor kappa‐light‐chain‐enhancer of activated B cells (NF-ĸB) family control important signaling pathways in the regulation of the host innate immune system. Various bacterial pathogens in the human gastrointestinal tract induce NF-ĸB activity and provoke pro-inflammatory signaling events in infected epithelial cells. NF-ĸB activation requires the phosphorylation-dependent proteolysis of inhibitor of ĸB (IĸB) molecules including the NF-ĸB precursors through ubiquitin-mediated proteolysis. The canonical NF-ĸB pathway merges on IĸB kinases (IKKs), which are required for signal transduction. Using CRISPR-Cas9 technology, secreted embryonic alkaline phosphatase (SEAP) reporter assays and cytokine enzyme-linked immunosorbent assay (ELISA), we demonstrate that the actin-binding protein cortactin is involved in NF-ĸB activation and subsequent interleukin-8 (IL-8) production upon infection by Helicobacter pylori, Salmonella enterica and Pseudomonas aeruginosa. Our data indicate that cortactin is needed to efficiently activate the c-Sarcoma (Src) kinase, which can positively stimulate NF-ĸB during infection. In contrast, cortactin is not involved in activation of NF-ĸB and IL-8 expression upon infection with Campylobacter species C. jejuni, C. coli or C. consisus, suggesting that Campylobacter species pluralis (spp.) induce a different signaling pathway upstream of cortactin to trigger the innate immune response.
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Affiliation(s)
- Nicole Tegtmeyer
- Department of Biology, Division of Microbiology, Friedrich-Alexander-University Erlangen-Nürnberg (FAU), Germany
| | - Delara Soltan Esmaeili
- Department of Biology, Division of Microbiology, Friedrich-Alexander-University Erlangen-Nürnberg (FAU), Germany
| | - Irshad Sharafutdinov
- Department of Biology, Division of Microbiology, Friedrich-Alexander-University Erlangen-Nürnberg (FAU), Germany
| | - Jakob Knorr
- Department of Biology, Division of Microbiology, Friedrich-Alexander-University Erlangen-Nürnberg (FAU), Germany
| | - Michael Naumann
- Institute of Experimental Internal Medicine, Medical Faculty, Otto von Guericke University Magdeburg, Germany
| | - Thomas Alter
- Institute of Food Safety and Food Hygiene, Centre for Veterinary Public Health, Freie Universität Berlin, Germany
| | - Steffen Backert
- Department of Biology, Division of Microbiology, Friedrich-Alexander-University Erlangen-Nürnberg (FAU), Germany
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24
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Human Genetic Diseases Linked to the Absence of NEMO: An Obligatory Somatic Mosaic Disorder in Male. Int J Mol Sci 2022; 23:ijms23031179. [PMID: 35163099 PMCID: PMC8835834 DOI: 10.3390/ijms23031179] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Revised: 01/17/2022] [Accepted: 01/18/2022] [Indexed: 01/22/2023] Open
Abstract
De novo somatic mutations are well documented in diseases such as neoplasia but are rarely reported in rare diseases. Hovewer, severe genetic diseases that are not compatible with embryonic development are caused exclusively by deleterious mutations that could only be found as mosaic and not as inherited mutations. We will review here the paradigmatic case of Incontinentia Pigmenti, a rare X-linked dominant disease caused by deficiency of the NEMO (also called IKKgamma) protein, which plays a pivotal role in tissue homeostasis. The loss-of-function mutations of NEMO are embryonically lethal in males while females survive because of unbalanced X-inactivation due to NEMO wild type (WT) expressing cells survival despite of NEMO mutant expressing cells. The few surviving IP males are obligatory mosaic mutants with the typical clinical presentation of IP in female. Indeed, the IP pathogenesis in the female and most likely also in the male somatic mosaics is based on the cellular effects of an impaired NEMO activity, but in the context of the interaction of genetically different cells in the affected tissue, which might underline the inflammatory status.
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25
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Surucu Yilmaz N, Bilgic Eltan S, Kayaoglu B, Geckin B, Heredia RJ, Sefer AP, Kiykim A, Nain E, Kasap N, Dogru O, Yucelten AD, Cinel L, Karasu G, Yesilipek A, Sozeri B, Kaya GG, Yilmaz IC, Baydemir I, Aydin Y, Cansen Kahraman D, Haimel M, Boztug K, Karakoc-Aydiner E, Gursel I, Ozen A, Baris S, Gursel M. Low Density Granulocytes and Dysregulated Neutrophils Driving Autoinflammatory Manifestations in NEMO Deficiency. J Clin Immunol 2022; 42:582-596. [PMID: 35028801 DOI: 10.1007/s10875-021-01176-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2021] [Accepted: 10/20/2021] [Indexed: 11/27/2022]
Abstract
NF-κB essential modulator (NEMO, IKK-γ) deficiency is a rare combined immunodeficiency caused by mutations in the IKBKG gene. Conventionally, patients are afflicted with life threatening recurrent microbial infections. Paradoxically, the spectrum of clinical manifestations includes severe inflammatory disorders. The mechanisms leading to autoinflammation in NEMO deficiency are currently unknown. Herein, we sought to investigate the underlying mechanisms of clinical autoinflammatory manifestations in a 12-years old male NEMO deficiency (EDA-ID, OMIM #300,291) patient by comparing the immune profile of the patient before and after hematopoietic stem cell transplantation (HSCT). Response to NF-kB activators were measured by cytokine ELISA. Neutrophil and low-density granulocyte (LDG) populations were analyzed by flow cytometry. Peripheral blood mononuclear cells (PBMC) transcriptome before and after HSCT and transcriptome of sorted normal-density neutrophils and LDGs were determined using the NanoString nCounter gene expression panels. ISG15 expression and protein ISGylation was based on Immunoblotting. Consistent with the immune deficiency, PBMCs of the patient were unresponsive to toll-like and T cell receptor-activators. Paradoxically, LDGs comprised 35% of patient PBMCs and elevated expression of genes such as MMP9, LTF, and LCN2 in the granulocytic lineage, high levels of IP-10 in the patient's plasma, spontaneous ISG15 expression and protein ISGylation indicative of a spontaneous type I interferon (IFN) signature were observed, all of which normalized after HSCT. Collectively, our results suggest that type I IFN signature observed in the patient, dysregulated LDGs and spontaneously activated neutrophils, potentially contribute to tissue damage in NEMO deficiency.
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Affiliation(s)
- Naz Surucu Yilmaz
- Department of Biological Sciences, Middle East Technical University, B-58, Üniversiteler Mah. Dumlupınar Bulvarı No:1, Ankara, Turkey
| | - Sevgi Bilgic Eltan
- Division of Pediatric Allergy and Immunology, Marmara University, Fevzi Çakmak Mah. No: 41, Istanbul, Turkey.,Istanbul Jeffrey Modell Diagnostic and Research Center for Primary Immunodeficiencies, Istanbul, Turkey.,The Isil Berat Barlan Center for Translational Medicine, Istanbul, Turkey
| | - Basak Kayaoglu
- Department of Biological Sciences, Middle East Technical University, B-58, Üniversiteler Mah. Dumlupınar Bulvarı No:1, Ankara, Turkey
| | - Busranur Geckin
- Department of Biological Sciences, Middle East Technical University, B-58, Üniversiteler Mah. Dumlupınar Bulvarı No:1, Ankara, Turkey
| | - Raul Jimenez Heredia
- Ludwig Boltzmann Institute for Rare and Undiagnosed Diseases, Vienna, Austria.,St. Anna Children's Cancer Research Institute (CCRI), Vienna, Austria.,CeMM Research Center for Molecular Medicine of the Austrian Academy of Sciences, Vienna, Austria.,Department of Pediatrics and Adolescent Medicine, Medical University of Vienna, Vienna, Austria
| | - Asena Pinar Sefer
- Division of Pediatric Allergy and Immunology, Marmara University, Fevzi Çakmak Mah. No: 41, Istanbul, Turkey.,Istanbul Jeffrey Modell Diagnostic and Research Center for Primary Immunodeficiencies, Istanbul, Turkey.,The Isil Berat Barlan Center for Translational Medicine, Istanbul, Turkey
| | - Ayca Kiykim
- Faculty of Medicine, Pediatric Allergy and Immunology, Istanbul University-Cerrahpasa, Istanbul, Turkey
| | - Ercan Nain
- Division of Pediatric Allergy and Immunology, Marmara University, Fevzi Çakmak Mah. No: 41, Istanbul, Turkey.,Istanbul Jeffrey Modell Diagnostic and Research Center for Primary Immunodeficiencies, Istanbul, Turkey.,The Isil Berat Barlan Center for Translational Medicine, Istanbul, Turkey
| | - Nurhan Kasap
- Division of Pediatric Allergy and Immunology, Marmara University, Fevzi Çakmak Mah. No: 41, Istanbul, Turkey.,Istanbul Jeffrey Modell Diagnostic and Research Center for Primary Immunodeficiencies, Istanbul, Turkey.,The Isil Berat Barlan Center for Translational Medicine, Istanbul, Turkey
| | - Omer Dogru
- Division of Pediatric Hematology-Oncology, Marmara University, Istanbul, Turkey
| | | | - Leyla Cinel
- Division of Pathology, Marmara University, Istanbul, Turkey
| | - Gulsun Karasu
- Goztepe Medicalpark Hospital, Pediatric Stem Cell Transplantation Unit, İstanbul, Turkey
| | - Akif Yesilipek
- Goztepe Medicalpark Hospital, Pediatric Stem Cell Transplantation Unit, İstanbul, Turkey
| | - Betul Sozeri
- Division of Pediatric Rheumatology, University of Health Sciences, Umraniye Research and Training Hospital, Istanbul, Turkey
| | - Goksu Gokberk Kaya
- Therapeutic ODN Research Lab, Department of Molecular Biology and Genetics, Bilkent University, Bilkent, 06800, Ankara, Turkey
| | - Ismail Cem Yilmaz
- Department of Biological Sciences, Middle East Technical University, B-58, Üniversiteler Mah. Dumlupınar Bulvarı No:1, Ankara, Turkey
| | - Ilayda Baydemir
- Department of Biological Sciences, Middle East Technical University, B-58, Üniversiteler Mah. Dumlupınar Bulvarı No:1, Ankara, Turkey
| | - Yagmur Aydin
- Department of Biological Sciences, Middle East Technical University, B-58, Üniversiteler Mah. Dumlupınar Bulvarı No:1, Ankara, Turkey
| | - Deniz Cansen Kahraman
- KanSiL, Department of Health Informatics, Graduate School of Informatics, Middle East Technical University, Ankara, Turkey
| | - Matthias Haimel
- Ludwig Boltzmann Institute for Rare and Undiagnosed Diseases, Vienna, Austria.,CeMM Research Center for Molecular Medicine of the Austrian Academy of Sciences, Vienna, Austria
| | - Kaan Boztug
- Ludwig Boltzmann Institute for Rare and Undiagnosed Diseases, Vienna, Austria.,St. Anna Children's Cancer Research Institute (CCRI), Vienna, Austria.,CeMM Research Center for Molecular Medicine of the Austrian Academy of Sciences, Vienna, Austria.,Department of Pediatrics and Adolescent Medicine, Medical University of Vienna, Vienna, Austria.,St. Anna Children's Hospital, Department of Pediatrics and Adolescent Medicine, Medical University of Vienna, Vienna, Austria
| | - Elif Karakoc-Aydiner
- Division of Pediatric Allergy and Immunology, Marmara University, Fevzi Çakmak Mah. No: 41, Istanbul, Turkey.,Istanbul Jeffrey Modell Diagnostic and Research Center for Primary Immunodeficiencies, Istanbul, Turkey.,The Isil Berat Barlan Center for Translational Medicine, Istanbul, Turkey
| | - Ihsan Gursel
- Therapeutic ODN Research Lab, Department of Molecular Biology and Genetics, Bilkent University, Bilkent, 06800, Ankara, Turkey
| | - Ahmet Ozen
- Division of Pediatric Allergy and Immunology, Marmara University, Fevzi Çakmak Mah. No: 41, Istanbul, Turkey.,Istanbul Jeffrey Modell Diagnostic and Research Center for Primary Immunodeficiencies, Istanbul, Turkey.,The Isil Berat Barlan Center for Translational Medicine, Istanbul, Turkey
| | - Safa Baris
- Division of Pediatric Allergy and Immunology, Marmara University, Fevzi Çakmak Mah. No: 41, Istanbul, Turkey. .,Istanbul Jeffrey Modell Diagnostic and Research Center for Primary Immunodeficiencies, Istanbul, Turkey. .,The Isil Berat Barlan Center for Translational Medicine, Istanbul, Turkey.
| | - Mayda Gursel
- Department of Biological Sciences, Middle East Technical University, B-58, Üniversiteler Mah. Dumlupınar Bulvarı No:1, Ankara, Turkey.
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26
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Hou J, Jeon B, Baek J, Yun Y, Kim D, Chang B, Kim S, Kim S. High fat diet-induced brain damaging effects through autophagy-mediated senescence, inflammation and apoptosis mitigated by ginsenoside F1-enhanced mixture. J Ginseng Res 2022; 46:79-90. [PMID: 35058728 PMCID: PMC8753566 DOI: 10.1016/j.jgr.2021.04.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2020] [Revised: 03/24/2021] [Accepted: 04/11/2021] [Indexed: 01/20/2023] Open
Abstract
Background Herbal medicines are popular approaches to capably prevent and treat obesity and its related diseases. Excessive exposure to dietary lipids causes oxidative stress and inflammation, which possibly induces cellular senescence and contribute the damaging effects in brain. The potential roles of selective enhanced ginsenoside in regulating high fat diet (HFD)-induced brain damage remain unknown. Methods The protection function of Ginsenoside F1-enhanced mixture (SGB121) was evaluated by in vivo and in vitro experiments. Human primary astrocytes and SH-SY5Y cells were treated with palmitic acid conjugated Bovine Serum Albumin, and the effects of SGB121 were determined by MTT and lipid uptake assays. For in vivo tests, C57BL/6J mice were fed with high fat diet for 3 months with or without SGB121 administration. Thereafter, immunohistochemistry, western blot, PCR and ELISA assays were conducted with brain tissues. Results and conclusion SGB121 selectively suppressed HFD-induced oxidative stress and cellular senescence in brain, and reduced subsequent inflammation responses manifested by abrogated secretion of IL-6, IL-1β and TNFα via NF-κB signaling pathway. Interestingly, SGB121 protects against HFD-induced damage by improving mitophagy and endoplasmic reticulum-stress associated autophagy flux and inhibiting apoptosis. In addition, SGB121 regulates lipid uptake and accumulation by FATP4 and PPARα. SGB121 significantly abates excessively phosphorylated tau protein in the cortex and GFAP activation in corpus callosum. Together, our results suggest that SGB121 is able to favor the resistance of brain to HFD-induced damage, therefore provide explicit evidence of the potential to be a functional food. High fat diet induces oxidative stress and subsequent cellular senescence in mice brain. High fat diet induces pathologies in cortex and GFAP activation in corpus callosum. Ginsenoside F1-enhanced mixture ameliorates damaging effect by modulating autophagy flux and inflammation.
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27
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Line Associated Thrombosis in Pediatric Patients With NF-κB Pathway Variants. J Pediatr Hematol Oncol 2021; 43:e436-e437. [PMID: 32032247 DOI: 10.1097/mph.0000000000001739] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/03/2019] [Accepted: 01/09/2020] [Indexed: 11/26/2022]
Abstract
Our report explores the complex role that nuclear factor-kappa B (NF-κB) plays in thrombosis formation, inflammation, and immunity; while additionally demonstrating that patients with NF-κB pathway pathogenic variants appear to carry a substantial thrombotic risk, particularly when secondary thrombotic risk factors are present. We propose that prophylactic anticoagulation should be strongly considered in such patients during high-risk situations and provide additional hematologic management strategies for those with NF-κB pathway alterations. We hope our work also calls to attention the potential need for a broader assessment of venous thromboembolism risk in patients with immune dysregulation to better delineate which patient populations may benefit from anticoagulation prophylaxis.
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28
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Stolzer I, Ruder B, Neurath MF, Günther C. Interferons at the crossroad of cell death pathways during gastrointestinal inflammation and infection. Int J Med Microbiol 2021; 311:151491. [PMID: 33662871 DOI: 10.1016/j.ijmm.2021.151491] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2020] [Revised: 02/03/2021] [Accepted: 02/23/2021] [Indexed: 02/07/2023] Open
Abstract
Interferons (IFNs) are pleiotropic immune-modulatory cytokines that are well known for their essential role in host defense against viruses, bacteria, and other pathogenic microorganisms. They can exert both, protective or destructive functions depending on the microorganism, the targeted tissue and the cellular context. Interferon signaling results in the induction of IFN-stimulated genes (ISGs) influencing different cellular pathways including direct anti-viral/anti-bacterial response, immune-modulation or cell death. Multiple pathways leading to host cell death have been described, and it is becoming clear that depending on the cellular context, IFN-induced cell death can be beneficial for both: host and pathogen. Accordingly, activation or repression of corresponding signaling mechanisms occurs during various types of infection but is also an important pathway for gastrointestinal inflammation and tissue damage. In this review, we summarize the role of interferons at the crossroad of various cell death pathways in the gut during inflammation and infection.
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Affiliation(s)
- Iris Stolzer
- Department of Medicine 1, University Hospital Erlangen, Friedrich-Alexander-Universität (FAU), Erlangen, Germany
| | - Barbara Ruder
- Department of Medicine 1, University Hospital Erlangen, Friedrich-Alexander-Universität (FAU), Erlangen, Germany
| | - Markus F Neurath
- Department of Medicine 1, University Hospital Erlangen, Friedrich-Alexander-Universität (FAU), Erlangen, Germany; Deutsches Zentrum Immuntherapie DZI, Friedrich-Alexander-Universität (FAU), Erlangen, Nürnberg, Germany
| | - Claudia Günther
- Department of Medicine 1, University Hospital Erlangen, Friedrich-Alexander-Universität (FAU), Erlangen, Germany.
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29
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Functions of ROS in Macrophages and Antimicrobial Immunity. Antioxidants (Basel) 2021; 10:antiox10020313. [PMID: 33669824 PMCID: PMC7923022 DOI: 10.3390/antiox10020313] [Citation(s) in RCA: 216] [Impact Index Per Article: 72.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Revised: 02/16/2021] [Accepted: 02/17/2021] [Indexed: 02/07/2023] Open
Abstract
Reactive oxygen species (ROS) are a chemically defined group of reactive molecules derived from molecular oxygen. ROS are involved in a plethora of processes in cells in all domains of life, ranging from bacteria, plants and animals, including humans. The importance of ROS for macrophage-mediated immunity is unquestioned. Their functions comprise direct antimicrobial activity against bacteria and parasites as well as redox-regulation of immune signaling and induction of inflammasome activation. However, only a few studies have performed in-depth ROS analyses and even fewer have identified the precise redox-regulated target molecules. In this review, we will give a brief introduction to ROS and their sources in macrophages, summarize the versatile roles of ROS in direct and indirect antimicrobial immune defense, and provide an overview of commonly used ROS probes, scavengers and inhibitors.
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30
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Markasz L, Olsson KW, Holmström G, Sindelar R. Cluster Analysis of Early Postnatal Biochemical Markers May Predict Development of Retinopathy of Prematurity. Transl Vis Sci Technol 2020; 9:14. [PMID: 33344058 PMCID: PMC7726592 DOI: 10.1167/tvst.9.13.14] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2020] [Accepted: 10/19/2020] [Indexed: 12/15/2022] Open
Abstract
Purpose Growth factors and inflammatory and angiogenetic proteins are involved in the development of retinopathy of prematurity (ROP). However, no early biochemical markers are in clinical use to predict ROP. By performing cluster analysis of multiple biomarkers, we aimed to determine patient groups with high and low risk for developing ROP. Methods In total, 202 protein markers in plasma were quantified by proximity extension assay from 35 extremely preterm infants on day 2 of life. Infants were sorted in groups by automated two-dimensional hierarchical clustering of all biomarkers. ROP was classified as stages I to III with or without surgical treatment. Predictive biomarkers were evaluated by analysis of variance and detected differences by two-sided paired t-test with Bonferroni corrections for multiple comparisons. Results Differences in 39 biochemical markers divided infants without ROP into two control groups (control 1, n = 7; control 2, n = 5; P < 0.05). Sixty-six biochemical markers defined differences between the control groups (n = 13) and all ROP infants (n = 23; P < 0.05). PARK7, VIM, MPO, CD69, and NEMO were markedly increased in control 1 compared to all ROP infants (P < 0.001). Lower TNFRSF4 and higher HER2 and GAL appeared in infants with ROP as compared to control 1 and/or 2 (P < 0.05, respectively). Conclusions Our data suggest that early elevated levels of PARK7, VIM, MPO, CD69, and NEMO may be associated with lower risk of developing ROP. Lower levels of TNFRSF4 with higher levels of HER2 and GAL may predict ROP development. Translational Relevance Cluster analysis of early postnatal biomarkers may help to identify infants with low or high risk of developing ROP.
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Affiliation(s)
- Laszlo Markasz
- Department of Women's and Children's Health, Uppsala University, Uppsala, Sweden
| | - Karl-Wilhelm Olsson
- Department of Women's and Children's Health, Uppsala University, Uppsala, Sweden.,Department of Surgical Sciences, Uppsala University, Uppsala, Sweden
| | - Gerd Holmström
- Department of Neuroscience/Ophthalmology, Uppsala University, Uppsala, Sweden
| | - Richard Sindelar
- Department of Women's and Children's Health, Uppsala University, Uppsala, Sweden
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31
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Schnappauf O, Aksentijevich I. Mendelian diseases of dysregulated canonical NF-κB signaling: From immunodeficiency to inflammation. J Leukoc Biol 2020; 108:573-589. [PMID: 32678922 DOI: 10.1002/jlb.2mr0520-166r] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2020] [Revised: 05/05/2020] [Accepted: 06/03/2020] [Indexed: 12/11/2022] Open
Abstract
NF-κB is a master transcription factor that activates the expression of target genes in response to various stimulatory signals. Activated NF-κB mediates a plethora of diverse functions including innate and adaptive immune responses, inflammation, cell proliferation, and NF-κB is regulated through interactions with IκB inhibitory proteins, which are in turn regulated by the inhibitor of κB kinase (IKK) complex. Together, these 3 components form the core of the NF-κB signalosomes that have cell-specific functions which are dependent on the interactions with other signaling molecules and pathways. The activity of NF-κB pathway is also regulated by a variety of post-translational modifications including phosphorylation and ubiquitination by Lys63, Met1, and Lys48 ubiquitin chains. The physiologic role of NF-κB is best studied in the immune system due to discovery of many human diseases caused by pathogenic variants in various proteins that constitute the NF-κB pathway. These disease-causing variants can act either as gain-of-function (GoF) or loss-of-function (LoF) and depending on the function of mutated protein, can cause either immunodeficiency or systemic inflammation. Typically, pathogenic missense variants act as GoF and they lead to increased activity in the pathway. LoF variants can be inherited as recessive or dominant alleles and can cause either a decrease or an increase in pathway activity. Dominantly inherited LoF variants often result in haploinsufficiency of inhibitory proteins. Here, we review human Mendelian immunologic diseases, which results from mutations in different molecules in the canonical NF-κB pathway and surprisingly present with a continuum of clinical features including immunodeficiency, atopy, autoimmunity, and autoinflammation.
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Affiliation(s)
- Oskar Schnappauf
- National Human Genome Research Institute, National Institutes of Health, Bethesda, Maryland, USA
| | - Ivona Aksentijevich
- National Human Genome Research Institute, National Institutes of Health, Bethesda, Maryland, USA
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The genetics of macrophage activation syndrome. Genes Immun 2020; 21:169-181. [PMID: 32291394 DOI: 10.1038/s41435-020-0098-4] [Citation(s) in RCA: 54] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2020] [Revised: 03/13/2020] [Accepted: 03/27/2020] [Indexed: 12/12/2022]
Abstract
Macrophage activation syndrome (MAS), or secondary hemophagocytic lymphohistiocytosis (HLH), is a cytokine storm syndrome associated with multi-organ system dysfunction and high mortality rates. Laboratory and clinical features resemble primary HLH, which arises in infancy (1 in 50,000 live births) from homozygous mutations in various genes critical to the perforin-mediated cytolytic pathway employed by NK cells and cytotoxic CD8 T lymphocytes. MAS/secondary HLH is about ten times more common and typically presents beyond infancy extending into adulthood. The genetics of MAS are far less defined than for familial HLH. However, the distinction between familial HLH and MAS/secondary HLH is blurred by the finding of heterozygous perforin-pathway mutations in MAS patients, which may function as hypomorphic or partial dominant-negative alleles and contribute to disease pathogenesis. In addition, mutations in a variety of other pathogenic pathways have been noted in patients with MAS/secondary HLH. Many of these genetically disrupted pathways result in a similar cytokine storm syndrome, and can be broadly categorized as impaired viral control (e.g., SH2P1A), dysregulated inflammasome activity (e.g., NLRC4), other immune defects (e.g., IKBKG), and dysregulated metabolism (e.g., LIPA). Collectively these genetic lesions likely combine with states of chronic inflammation, as seen in various rheumatic diseases (e.g., still disease), with or without identified infections, to result in MAS pathology as explained by the threshold model of disease. This emerging paradigm may ultimately support genetic risk stratification for high-risk chronic and even acute inflammatory disorders. Moving forward, continued whole-exome and -genome sequencing will likely identify novel MAS gene associations, as well as noncoding mutations altering levels of gene expression.
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Sadek J, Wuo MG, Rooklin D, Hauenstein A, Hong SH, Gautam A, Wu H, Zhang Y, Cesarman E, Arora PS. Modulation of virus-induced NF-κB signaling by NEMO coiled coil mimics. Nat Commun 2020; 11:1786. [PMID: 32286300 PMCID: PMC7156456 DOI: 10.1038/s41467-020-15576-3] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2019] [Accepted: 03/12/2020] [Indexed: 01/07/2023] Open
Abstract
Protein-protein interactions featuring intricate binding epitopes remain challenging targets for synthetic inhibitors. Interactions of NEMO, a scaffolding protein central to NF-κB signaling, exemplify this challenge. Various regulators are known to interact with different coiled coil regions of NEMO, but the topological complexity of this protein has limited inhibitor design. We undertook a comprehensive effort to block the interaction between vFLIP, a Kaposi’s sarcoma herpesviral oncoprotein, and NEMO using small molecule screening and rational design. Our efforts reveal that a tertiary protein structure mimic of NEMO is necessary for potent inhibition. The rationally designed mimic engages vFLIP directly causing complex disruption, protein degradation and suppression of NF-κB signaling in primary effusion lymphoma (PEL). NEMO mimic treatment induces cell death and delays tumor growth in a PEL xenograft model. Our studies with this inhibitor reveal the critical nexus of signaling complex stability in the regulation of NF-κB by a viral oncoprotein. NF-κB signalling involves the scaffold protein NEMO, which can be bound by the oncoprotein vFLIP to promote cell survival and oncogenic transformation. Here the authors rationally engineer a tertiary protein mimic of NEMO to disrupt the vFLIP-NEMO interaction to induce cell death.
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Affiliation(s)
- Jouliana Sadek
- Department of Pathology and Laboratory Medicine, Weill Cornell Medical College, New York, NY, 10065, USA
| | - Michael G Wuo
- Department of Chemistry, New York University, New York, NY, 10003, USA
| | - David Rooklin
- Department of Chemistry, New York University, New York, NY, 10003, USA
| | - Arthur Hauenstein
- Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, MA, 02115, USA
| | - Seong Ho Hong
- Department of Chemistry, New York University, New York, NY, 10003, USA
| | - Archana Gautam
- Icahn School of Medicine at Mount Sinai, New York, NY, 10029-5674, USA
| | - Hao Wu
- Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, MA, 02115, USA
| | - Yingkai Zhang
- Department of Chemistry, New York University, New York, NY, 10003, USA.,NYU-ECNU Center for Computational Chemistry, New York University-Shanghai, 200122, Shanghai, China
| | - Ethel Cesarman
- Department of Pathology and Laboratory Medicine, Weill Cornell Medical College, New York, NY, 10065, USA.
| | - Paramjit S Arora
- Department of Chemistry, New York University, New York, NY, 10003, USA.
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Fatima A, Schuster J, Akram T, González CM, Sobol M, Hoeber J, Dahl N. Incontinentia pigmenti: Generation of an IKBKG deficient human iPSC line (KICRi002-A-1) on a 46,XY background using CRISPR/Cas9. Stem Cell Res 2020; 44:101739. [PMID: 32126327 DOI: 10.1016/j.scr.2020.101739] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/13/2020] [Revised: 02/05/2020] [Accepted: 02/11/2020] [Indexed: 10/25/2022] Open
Abstract
Incontinentia pigmenti (IP) is an X-linked dominant neuroectodermal dysplasia caused by loss-of-function mutations in the IKBKG gene. Using CRISPR/Cas9 technology, we generated an IKBKG knock-out iPSC line (KICRi002-A-1) on a 46,XY background. The iPSC line showed a normal karyotype, expressed pluripotency markers and exhibited capability to differentiate into the three germ layers in vitro. Off-target editing was excluded and no IKBKG mRNA expression could be detected. Our line offers a useful resource to elucidate mechanisms caused by IKBKG deficiency that leads to disrupted male fetal development and for drug screening to improve treatment of female patients with IP.
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Affiliation(s)
- Ambrin Fatima
- Department of Immunology, Genetics and Pathology, Science for Life Laboratory, Uppsala University, 751 08 Uppsala, Sweden
| | - Jens Schuster
- Department of Immunology, Genetics and Pathology, Science for Life Laboratory, Uppsala University, 751 08 Uppsala, Sweden.
| | - Talia Akram
- Department of Immunology, Genetics and Pathology, Science for Life Laboratory, Uppsala University, 751 08 Uppsala, Sweden; Human Molecular Genetics Laboratory, National Institute for Biotechnology and Genetic Engineering (NIBGE), Faisalabad, Pakistan
| | - Carolina Maya González
- Department of Immunology, Genetics and Pathology, Science for Life Laboratory, Uppsala University, 751 08 Uppsala, Sweden
| | - Maria Sobol
- Department of Immunology, Genetics and Pathology, Science for Life Laboratory, Uppsala University, 751 08 Uppsala, Sweden
| | - Jan Hoeber
- Department of Immunology, Genetics and Pathology, Science for Life Laboratory, Uppsala University, 751 08 Uppsala, Sweden
| | - Niklas Dahl
- Department of Immunology, Genetics and Pathology, Science for Life Laboratory, Uppsala University, 751 08 Uppsala, Sweden.
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Inflammation-Induced Alternative Pre-mRNA Splicing in Mouse Alveolar Macrophages. G3-GENES GENOMES GENETICS 2020; 10:555-567. [PMID: 31810980 PMCID: PMC7003074 DOI: 10.1534/g3.119.400935] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Alveolar macrophages serve as central orchestrators of inflammatory responses in the lungs, both initiating their onset and promoting their resolution. However, the mechanisms that program macrophages for these dynamic responses are not fully understood. Over 95% of all mammalian genes undergo alternative pre-mRNA splicing. While alternative splicing has been shown to regulate inflammatory responses in macrophages in vitro, it has not been investigated on a genome-wide scale in vivo. Here we used RNAseq to investigate alternative pre-mRNA splicing in alveolar macrophages isolated from lipopolysaccharide (LPS)-treated mice during the peak of inflammation and during its resolution. We found that lung inflammation induced substantial alternative pre-mRNA splicing in alveolar macrophages. The number of changes in isoform usage was greatest at the peak of inflammation and involved multiple classes of alternative pre-mRNA splicing events. Comparative pathway analysis of inflammation-induced changes in alternative pre-mRNA splicing and differential gene expression revealed overlap of pathways enriched for immune responses such as chemokine signaling and cellular metabolism. Moreover, alternative pre-mRNA splicing of genes in metabolic pathways differed in tissue resident vs. recruited (blood monocyte-derived) alveolar macrophages and corresponded to changes in core metabolism, including a switch to Warburg-like metabolism in recruited macrophages with increased glycolysis and decreased flux through the tricarboxylic acid cycle.
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Babaei M, Liu Y, Wuerzberger-Davis SM, McCaslin EZ, DiRusso CJ, Yeo AT, Kagermazova L, Miyamoto S, Gilmore TD. CRISPR/Cas9-based editing of a sensitive transcriptional regulatory element to achieve cell type-specific knockdown of the NEMO scaffold protein. PLoS One 2019; 14:e0222588. [PMID: 31553754 PMCID: PMC6760803 DOI: 10.1371/journal.pone.0222588] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2019] [Accepted: 09/02/2019] [Indexed: 11/25/2022] Open
Abstract
The use of alternative promoters for the cell type-specific expression of a given mRNA/protein is a common cell strategy. NEMO is a scaffold protein required for canonical NF-κB signaling. Transcription of the NEMO gene is primarily controlled by two promoters: one (promoter B) drives NEMO transcription in most cell types and the second (promoter D) is largely responsible for NEMO transcription in liver cells. Herein, we have used a CRISPR/Cas9-based approach to disrupt a core sequence element of promoter B, and this genetic editing essentially eliminates expression of NEMO mRNA and protein in 293T human kidney cells. By cell subcloning, we have isolated targeted 293T cell lines that express no detectable NEMO protein, have defined genomic alterations at promoter B, and do not support activation of canonical NF-κB signaling in response to treatment with tumor necrosis factor. Nevertheless, non-canonical NF-κB signaling is intact in these NEMO-deficient cells. Expression of ectopic wild-type NEMO, but not certain human NEMO disease mutants, in the edited cells restores downstream NF-κB signaling in response to tumor necrosis factor. Targeting of the promoter B element does not substantially reduce NEMO expression (from promoter D) in the human SNU-423 liver cancer cell line. Thus, we have created a strategy for selectively eliminating cell type-specific expression from an alternative promoter and have generated 293T cell lines with a functional knockout of NEMO. The implications of these findings for further studies and for therapeutic approaches to target canonical NF-κB signaling are discussed.
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Affiliation(s)
- Milad Babaei
- Department of Biology, Boston University, Boston, Massachusetts, United States of America
| | - Yuekun Liu
- Department of Biology, Boston University, Boston, Massachusetts, United States of America
| | - Shelly M. Wuerzberger-Davis
- Department of Oncology, McArdle Laboratory for Cancer Research, University of Wisconsin Carbone Cancer Center, University of Wisconsin, Madison, Wisconsin, United States of America
| | - Ethan Z. McCaslin
- Department of Biology, Boston University, Boston, Massachusetts, United States of America
| | - Christopher J. DiRusso
- Department of Biology, Boston University, Boston, Massachusetts, United States of America
| | - Alan T. Yeo
- Department of Biology, Boston University, Boston, Massachusetts, United States of America
| | - Larisa Kagermazova
- Department of Biology, Boston University, Boston, Massachusetts, United States of America
| | - Shigeki Miyamoto
- Department of Oncology, McArdle Laboratory for Cancer Research, University of Wisconsin Carbone Cancer Center, University of Wisconsin, Madison, Wisconsin, United States of America
| | - Thomas D. Gilmore
- Department of Biology, Boston University, Boston, Massachusetts, United States of America
- * E-mail:
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Shaffer R, DeMaria AM, Kagermazova L, Liu Y, Babaei M, Caban-Penix S, Cervantes A, Jehle S, Makowski L, Gilmore TD, Whitty A, Allen KN. A Central Region of NF-κB Essential Modulator Is Required for IKKβ-Induced Conformational Change and for Signal Propagation. Biochemistry 2019; 58:2906-2920. [PMID: 31145594 DOI: 10.1021/acs.biochem.8b01316] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
NF-κB essential modulator (NEMO) regulates NF-κB signaling by acting as a scaffold for the kinase IKKβ to direct its activity toward the NF-κB inhibitor, IκBα. Here, we show that a highly conserved central region of NEMO termed the intervening domain (IVD, amino acids 112-195) plays a key role in NEMO function. We determined a structural model of full-length NEMO by small-angle X-ray scattering and show that full-length, wild-type NEMO becomes more compact upon binding of a peptide comprising the NEMO binding domain of IKKβ (amino acids 701-745). Mutation of conserved IVD residues (9SG-NEMO) disrupts this conformational change in NEMO and abolishes the ability of NEMO to propagate NF-κB signaling in cells, although the affinity of 9SG-NEMO for IKKβ compared to that of the wild type is unchanged. On the basis of these results, we propose a model in which the IVD is required for a conformational change in NEMO that is necessary for its ability to direct phosphorylation of IκBα by IKKβ. Our findings suggest a molecular explanation for certain disease-associated mutations within the IVD and provide insight into the role of conformational change in signaling scaffold proteins.
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Affiliation(s)
| | | | | | | | | | | | | | | | - Lee Makowski
- Department of Bioengineering , Northeastern University , Boston , Massachusetts 02115 , United States
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Li R, Chen C, He J, Zhang L, Zhang L, Guo Y, Zhang W, Tan K, Huang J. E3 ligase ASB8 promotes porcine reproductive and respiratory syndrome virus proliferation by stabilizing the viral Nsp1α protein and degrading host IKKβ kinase. Virology 2019; 532:55-68. [DOI: 10.1016/j.virol.2019.04.004] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2019] [Revised: 03/30/2019] [Accepted: 04/12/2019] [Indexed: 12/18/2022]
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Arterivirus nsp4 Antagonizes Interferon Beta Production by Proteolytically Cleaving NEMO at Multiple Sites. J Virol 2019; 93:JVI.00385-19. [PMID: 30944180 PMCID: PMC6613749 DOI: 10.1128/jvi.00385-19] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2019] [Accepted: 03/30/2019] [Indexed: 12/24/2022] Open
Abstract
Equine arteritis virus (EAV) and porcine reproductive and respiratory syndrome virus (PRRSV) represent two members of the family Arteriviridae and pose major threats for the horse- and swine-breeding industries worldwide. A previous study suggested that PRRSV nsp4, a 3C-like protease, antagonizes interferon beta (IFN-β) production by cleaving the NF-κB essential modulator (NEMO) at a single site, glutamate 349 (E349). Here, we demonstrated that EAV nsp4 also inhibited virus-induced IFN-β production by targeting NEMO for proteolytic cleavage and that the scission occurred at four sites: E166, E171, glutamine 205 (Q205), and E349. Additionally, we found that, besides the previously reported cleavage site E349 in NEMO, scission by PRRSV nsp4 took place at two additional sites, E166 and E171. These results imply that while cleaving NEMO is a common strategy utilized by EAV and PRRSV nsp4 to antagonize IFN induction, EAV nsp4 adopts a more complex substrate recognition mechanism to target NEMO. By analyzing the abilities of the eight different NEMO fragments resulting from EAV or PRRSV nsp4 scission to induce IFN-β production, we serendipitously found that a NEMO fragment (residues 1 to 349) could activate IFN-β transcription more robustly than full-length NEMO, whereas all other NEMO cleavage products were abrogated for the IFN-β-inducing capacity. Thus, NEMO cleavage at E349 alone may not be sufficient to completely inactivate the IFN response via this signaling adaptor. Altogether, our findings suggest that EAV and PRRSV nsp4 cleave NEMO at multiple sites and that this strategy is critical for disarming the innate immune response for viral survival.IMPORTANCE The arterivirus nsp4-encoded 3C-like protease (3CLpro) plays an important role in virus replication and immune evasion, making it an attractive target for antiviral therapeutics. Previous work suggested that PRRSV nsp4 suppresses type I IFN production by cleaving NEMO at a single site. In contrast, the present study demonstrates that both EAV and PRRSV nsp4 cleave NEMO at multiple sites and that this strategy is essential for disruption of type I IFN production. Moreover, we reveal that EAV nsp4 also cleaves NEMO at glutamine 205 (Q205), which is not targeted by PRRSV nsp4. Notably, targeting a glutamine in NEMO for cleavage has been observed only with picornavirus 3C proteases (3Cpro) and coronavirus 3CLpro In aggregate, our work expands knowledge of the innate immune evasion mechanisms associated with NEMO cleavage by arterivirus nsp4 and describes a novel substrate recognition characteristic of EAV nsp4.
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Ivanisenko NV, Buchbinder JH, Espe J, Richter M, Bollmann M, Hillert LK, Ivanisenko VA, Lavrik IN. Delineating the role of c-FLIP/NEMO interaction in the CD95 network via rational design of molecular probes. BMC Genomics 2019; 20:293. [PMID: 31815628 PMCID: PMC6900753 DOI: 10.1186/s12864-019-5539-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND Structural homology modeling supported by bioinformatics analysis plays a key role in uncovering new molecular interactions within gene regulatory networks. Here, we have applied this powerful approach to analyze the molecular interactions orchestrating death receptor signaling networks. In particular, we focused on the molecular mechanisms of CD95-mediated NF-κB activation and the role of c-FLIP/NEMO interaction in the induction of this pathway. RESULTS To this end, we have created the homology model of the c-FLIP/NEMO complex using the reported structure of the v-FLIP/NEMO complex, and rationally designed peptides targeting this complex. The designed peptides were based on the NEMO structure. Strikingly, the experimental in vitro validation demonstrated that the best inhibitory effects on CD95-mediated NF-κB activation are exhibited by the NEMO-derived peptides with the substitution D242Y of NEMO. Furthermore, we have assumed that the c-FLIP/NEMO complex is recruited to the DED filaments formed upon CD95 activation and validated this assumption in silico. Further insight into the function of c-FLIP/NEMO complex was provided by the analysis of evolutionary conservation of interacting regions which demonstrated that this interaction is common in distinct mammalian species. CONCLUSIONS Taken together, using a combination of bioinformatics and experimental approaches we obtained new insights into CD95-mediated NF-κB activation, providing manifold possibilities for targeting the death receptor network.
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Affiliation(s)
- Nikita V Ivanisenko
- The Federal Research Center Institute of Cytology and Genetics SB RAS, Novosibirsk, Russia.,Novosibirsk State University, Novosibirsk, Russia
| | - Jörn H Buchbinder
- Translational Inflammation research, Medical Faculty, Otto von Guericke University, Magdeburg, Germany
| | - Johannes Espe
- Translational Inflammation research, Medical Faculty, Otto von Guericke University, Magdeburg, Germany
| | - Max Richter
- Translational Inflammation research, Medical Faculty, Otto von Guericke University, Magdeburg, Germany
| | - Miriam Bollmann
- Translational Inflammation research, Medical Faculty, Otto von Guericke University, Magdeburg, Germany
| | - Laura K Hillert
- Translational Inflammation research, Medical Faculty, Otto von Guericke University, Magdeburg, Germany
| | - Vladimir A Ivanisenko
- The Federal Research Center Institute of Cytology and Genetics SB RAS, Novosibirsk, Russia.,Novosibirsk State University, Novosibirsk, Russia
| | - Inna N Lavrik
- The Federal Research Center Institute of Cytology and Genetics SB RAS, Novosibirsk, Russia. .,Translational Inflammation research, Medical Faculty, Otto von Guericke University, Magdeburg, Germany.
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Ma X, Ning S. Shikimic acid promotes estrogen receptor(ER)-positive breast cancer cells proliferation via activation of NF-κB signaling. Toxicol Lett 2019; 312:65-71. [PMID: 31048002 DOI: 10.1016/j.toxlet.2019.04.030] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2018] [Revised: 04/21/2019] [Accepted: 04/26/2019] [Indexed: 12/24/2022]
Abstract
Shikimic acid (SA), a widely-known hydroaromatic compound enriched in Bracken fern and Illicium verum (also known as Chinese star anise), increases the risk of gastric and esophageal carcinoma, nevertheless, the influence of SA on breast cancer remains indistinct. Herein we found that, with models in vitro, SA significantly promoted estrogen receptor(ER) positive cells proliferation and NF-κB activation was involved in it. Moreover, our data showed that IκBα, a critically endogenous inhibitor of NF-κB, was repressed. Subsequently, we found increase of miR-300 by SA treatment sand miR-300 could target IκBα mRNA. Additionally, inhibition of miR-300 abrogated the repression of IκBα by SA. As a result, miR-300 was also involved in NF-κB activation and breast cancer cells proliferation promotion due to SA exposure. Taken together, with ER-positive breast cancer cell models in vitro, MCF-7 and T47D, our results implied that SA promoted breast cancer cells proliferation via a miR-300-induced NF-κB dependent pathway controlling cell cycle proteins.
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Affiliation(s)
- Xiao Ma
- Department of Health Education and Administration, Jinhua Municipal Central Hospital, Jinhua, 321000, China
| | - Shilong Ning
- Department of Clinical Nutrition, Jinhua Municipal Central Hospital, Jinhua, 321000, China.
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The IKK-binding domain of NEMO is an irregular coiled coil with a dynamic binding interface. Sci Rep 2019; 9:2950. [PMID: 30814588 PMCID: PMC6393490 DOI: 10.1038/s41598-019-39588-2] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2018] [Accepted: 01/25/2019] [Indexed: 11/29/2022] Open
Abstract
NEMO is an essential component in the activation of the canonical NF-κB pathway and exerts its function by recruiting the IκB kinases (IKK) to the IKK complex. Inhibition of the NEMO/IKKs interaction is an attractive therapeutic paradigm for diseases related to NF-κB mis-regulation, but a difficult endeavor because of the extensive protein-protein interface. Here we report the high-resolution structure of the unbound IKKβ-binding domain of NEMO that will greatly facilitate the design of NEMO/IKK inhibitors. The structures of unbound NEMO show a closed conformation that partially occludes the three binding hot-spots and suggest a facile transition to an open state that can accommodate ligand binding. By fusing coiled-coil adaptors to the IKKβ-binding domain of NEMO, we succeeded in creating a protein with improved solution behavior, IKKβ-binding affinity and crystallization compatibility, which will enable the structural characterization of new NEMO/inhibitor complexes.
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Herb M, Gluschko A, Wiegmann K, Farid A, Wolf A, Utermöhlen O, Krut O, Krönke M, Schramm M. Mitochondrial reactive oxygen species enable proinflammatory signaling through disulfide linkage of NEMO. Sci Signal 2019; 12:12/568/eaar5926. [PMID: 30755476 DOI: 10.1126/scisignal.aar5926] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
A major function of macrophages during infection is initiation of the proinflammatory response, leading to the secretion of cytokines that help to orchestrate the immune response. Here, we identify reactive oxygen species (ROS) as crucial mediators of proinflammatory signaling leading to cytokine secretion in Listeria monocytogenes-infected macrophages. ROS produced by NADPH oxidases (Noxes), such as Nox2, are key components of the macrophage response to invading pathogens; however, our data show that the ROS that mediated proinflammatory signaling were produced by mitochondria (mtROS). We identified the inhibitor of κB (IκB) kinase (IKK) complex regulatory subunit NEMO [nuclear factor κB (NF-κB) essential modulator] as a target for mtROS. Specifically, mtROS induced intermolecular covalent linkage of NEMO through disulfide bonds formed by Cys54 and Cys347, which was essential for activation of the IKK complex and subsequent signaling through the extracellular signal-regulated protein kinases 1 and 2 (ERK1/2) and NF-κB pathways that eventually led to the secretion of proinflammatory cytokines. We thus identify mtROS-dependent disulfide linkage of NEMO as an essential regulatory step of the proinflammatory response of macrophages to bacterial infection.
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Affiliation(s)
- Marc Herb
- Institute for Medical Microbiology, Immunology and Hygiene, Faculty of Medicine and University Hospital Cologne, University of Cologne, 50935 Cologne, Germany
| | - Alexander Gluschko
- Institute for Medical Microbiology, Immunology and Hygiene, Faculty of Medicine and University Hospital Cologne, University of Cologne, 50935 Cologne, Germany
| | - Katja Wiegmann
- Institute for Medical Microbiology, Immunology and Hygiene, Faculty of Medicine and University Hospital Cologne, University of Cologne, 50935 Cologne, Germany
| | - Alina Farid
- Institute for Medical Microbiology, Immunology and Hygiene, Faculty of Medicine and University Hospital Cologne, University of Cologne, 50935 Cologne, Germany
| | - Anne Wolf
- Department of Ophthalmology, Faculty of Medicine and University Hospital Cologne, University of Cologne, 50931 Cologne, Germany
| | - Olaf Utermöhlen
- Institute for Medical Microbiology, Immunology and Hygiene, Faculty of Medicine and University Hospital Cologne, University of Cologne, 50935 Cologne, Germany.,Center of Molecular Medicine Cologne, 50931 Cologne, Germany.,German Center for Infection Research (DZIF), 50931 Cologne, Germany
| | - Oleg Krut
- Paul-Ehrlich-Institute, 63225 Langen, Germany
| | - Martin Krönke
- Institute for Medical Microbiology, Immunology and Hygiene, Faculty of Medicine and University Hospital Cologne, University of Cologne, 50935 Cologne, Germany.,Center of Molecular Medicine Cologne, 50931 Cologne, Germany.,German Center for Infection Research (DZIF), 50931 Cologne, Germany.,Cologne Cluster of Excellence on Cellular Stress Responses in Aging-associated Diseases (CECAD), 50931 Cologne, Germany
| | - Michael Schramm
- Institute for Medical Microbiology, Immunology and Hygiene, Faculty of Medicine and University Hospital Cologne, University of Cologne, 50935 Cologne, Germany.
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Lafont E, Draber P, Rieser E, Reichert M, Kupka S, de Miguel D, Draberova H, von Mässenhausen A, Bhamra A, Henderson S, Wojdyla K, Chalk A, Surinova S, Linkermann A, Walczak H. TBK1 and IKKε prevent TNF-induced cell death by RIPK1 phosphorylation. Nat Cell Biol 2018; 20:1389-1399. [PMID: 30420664 PMCID: PMC6268100 DOI: 10.1038/s41556-018-0229-6] [Citation(s) in RCA: 182] [Impact Index Per Article: 30.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2017] [Accepted: 10/08/2018] [Indexed: 12/20/2022]
Abstract
The linear-ubiquitin chain assembly complex (LUBAC) modulates signalling via various immune receptors. In tumour necrosis factor (TNF) signalling, linear (also known as M1) ubiquitin enables full gene activation and prevents cell death. However, the mechanisms underlying cell death prevention remain ill-defined. Here, we show that LUBAC activity enables TBK1 and IKKε recruitment to and activation at the TNF receptor 1 signalling complex (TNFR1-SC). While exerting only limited effects on TNF-induced gene activation, TBK1 and IKKε are essential to prevent TNF-induced cell death. Mechanistically, TBK1 and IKKε phosphorylate the kinase RIPK1 in the TNFR1-SC, thereby preventing RIPK1-dependent cell death. This activity is essential in vivo, as it prevents TNF-induced lethal shock. Strikingly, NEMO (also known as IKKγ), which mostly, but not exclusively, binds the TNFR1-SC via M1 ubiquitin, mediates the recruitment of the adaptors TANK and NAP1 (also known as AZI2). TANK is constitutively associated with both TBK1 and IKKε, while NAP1 is associated with TBK1. We discovered a previously unrecognized cell death checkpoint that is mediated by TBK1 and IKKε, and uncovered an essential survival function for NEMO, whereby it enables the recruitment and activation of these non-canonical IKKs to prevent TNF-induced cell death.
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Affiliation(s)
- Elodie Lafont
- Centre for Cell Death, Cancer and Inflammation (CCCI), UCL Cancer Institute, University College London, London, UK
| | - Peter Draber
- Centre for Cell Death, Cancer and Inflammation (CCCI), UCL Cancer Institute, University College London, London, UK
- Laboratory of Adaptive Immunity, Institute of Molecular Genetics of the Czech Academy of Sciences, Prague, Czech Republic
| | - Eva Rieser
- Centre for Cell Death, Cancer and Inflammation (CCCI), UCL Cancer Institute, University College London, London, UK
| | - Matthias Reichert
- Centre for Cell Death, Cancer and Inflammation (CCCI), UCL Cancer Institute, University College London, London, UK
| | - Sebastian Kupka
- Centre for Cell Death, Cancer and Inflammation (CCCI), UCL Cancer Institute, University College London, London, UK
| | - Diego de Miguel
- Centre for Cell Death, Cancer and Inflammation (CCCI), UCL Cancer Institute, University College London, London, UK
| | - Helena Draberova
- Centre for Cell Death, Cancer and Inflammation (CCCI), UCL Cancer Institute, University College London, London, UK
- Laboratory of Adaptive Immunity, Institute of Molecular Genetics of the Czech Academy of Sciences, Prague, Czech Republic
| | - Anne von Mässenhausen
- Division of Nephrology, Department of Internal Medicine III, University Hospital Carl Gustav Carus at the Technical University Dresden, Dresden, Germany
| | - Amandeep Bhamra
- Proteomics Research Core Facility, UCL Cancer Institute, University College London, London, UK
| | - Stephen Henderson
- Bill Lyons Informatics Centre (BLIC), UCL Cancer Institute, University College London, London, UK
| | - Katarzyna Wojdyla
- Proteomics Research Core Facility, UCL Cancer Institute, University College London, London, UK
| | - Avigayil Chalk
- Laboratory of Adaptive Immunity, Institute of Molecular Genetics of the Czech Academy of Sciences, Prague, Czech Republic
| | - Silvia Surinova
- Laboratory of Adaptive Immunity, Institute of Molecular Genetics of the Czech Academy of Sciences, Prague, Czech Republic
- Proteomics Research Core Facility, UCL Cancer Institute, University College London, London, UK
| | - Andreas Linkermann
- Division of Nephrology, Department of Internal Medicine III, University Hospital Carl Gustav Carus at the Technical University Dresden, Dresden, Germany
| | - Henning Walczak
- Centre for Cell Death, Cancer and Inflammation (CCCI), UCL Cancer Institute, University College London, London, UK.
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45
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Coppola R, Devirgiliis V, Carbotti M, Zanframundo S, Roberti V, Panasiti V. A case of basal cell carcinoma in a young patient with incontinentia pigmenti. GIORN ITAL DERMAT V 2018; 155:526-527. [PMID: 30295444 DOI: 10.23736/s0392-0488.18.06081-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Rosa Coppola
- Department of Dermatology, Sapienza University, Rome, Italy -
| | | | - Mattia Carbotti
- Unit of Plastic and Reconstructive Surgery, Campus Bio-Medico University, Rome, Italy
| | - Salvatore Zanframundo
- Unit of Plastic and Reconstructive Surgery, Campus Bio-Medico University, Rome, Italy
| | | | - Vincenzo Panasiti
- Unit of Plastic and Reconstructive Surgery, Campus Bio-Medico University, Rome, Italy
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46
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Lindquist JA, Mertens PR. Cold shock proteins: from cellular mechanisms to pathophysiology and disease. Cell Commun Signal 2018; 16:63. [PMID: 30257675 PMCID: PMC6158828 DOI: 10.1186/s12964-018-0274-6] [Citation(s) in RCA: 85] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2018] [Accepted: 09/13/2018] [Indexed: 12/21/2022] Open
Abstract
Cold shock proteins are multifunctional RNA/DNA binding proteins, characterized by the presence of one or more cold shock domains. In humans, the best characterized members of this family are denoted Y-box binding proteins, such as Y-box binding protein-1 (YB-1). Biological activities range from the regulation of transcription, splicing and translation, to the orchestration of exosomal RNA content. Indeed, the secretion of YB-1 from cells via exosomes has opened the door to further potent activities. Evidence links a skewed cold shock protein expression pattern with cancer and inflammatory diseases. In this review the evidence for a causative involvement of cold shock proteins in disease development and progression is summarized. Furthermore, the potential application of cold shock proteins for diagnostics and as targets for therapy is elucidated.
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Affiliation(s)
- Jonathan A Lindquist
- Clinic for Nephrology and Hypertension, Diabetology and Endocrinology, Otto-von-Guericke University Magdeburg, Leipziger Strasse 44, 39120, Magdeburg, Germany
| | - Peter R Mertens
- Clinic for Nephrology and Hypertension, Diabetology and Endocrinology, Otto-von-Guericke University Magdeburg, Leipziger Strasse 44, 39120, Magdeburg, Germany.
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47
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XL-EDA-ID Presenting with Congenital Duodenal Atresia and Perforations. J Clin Immunol 2018; 38:733-735. [PMID: 30146668 DOI: 10.1007/s10875-018-0544-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2018] [Accepted: 08/22/2018] [Indexed: 11/26/2022]
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48
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Puar YR, Shanmugam MK, Fan L, Arfuso F, Sethi G, Tergaonkar V. Evidence for the Involvement of the Master Transcription Factor NF-κB in Cancer Initiation and Progression. Biomedicines 2018; 6:biomedicines6030082. [PMID: 30060453 PMCID: PMC6163404 DOI: 10.3390/biomedicines6030082] [Citation(s) in RCA: 137] [Impact Index Per Article: 22.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2018] [Revised: 07/23/2018] [Accepted: 07/24/2018] [Indexed: 12/14/2022] Open
Abstract
Nuclear factor kappa-light-chain-enhancer of activated B cells (NF-κB) is responsible for the regulation of a large number of genes that are involved in important physiological processes, including survival, inflammation, and immune responses. At the same time, this transcription factor can control the expression of a plethora of genes that promote tumor cell proliferation, survival, metastasis, inflammation, invasion, and angiogenesis. The aberrant activation of this transcription factor has been observed in several types of cancer and is known to contribute to aggressive tumor growth and resistance to therapeutic treatment. Although NF-κB has been identified to be a major contributor to cancer initiation and development, there is evidence revealing its role in tumor suppression. This review briefly highlights the major mechanisms of NF-κB activation, the role of NF-κB in tumor promotion and suppression, as well as a few important pharmacological strategies that have been developed to modulate NF-κB function.
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Affiliation(s)
- Yu Rou Puar
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117600, Singapore.
| | - Muthu K Shanmugam
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117600, Singapore.
| | - Lu Fan
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117600, Singapore.
| | - Frank Arfuso
- Stem Cell and Cancer Biology Laboratory, School of Biomedical Sciences, Curtin Health Innovation Research Institute, Curtin University, Perth, WA 6009, Australia.
| | - Gautam Sethi
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117600, Singapore.
| | - Vinay Tergaonkar
- Institute of Molecular and Cellular Biology (A*STAR), 61 Biopolis Drive, Singapore 138673, Singapore.
- Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117597, Singapore.
- Centre for Cancer Biology (University of South Australia and SA Pathology), Adelaide, SA 5000, Australia.
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49
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Reyes-Reali J, Mendoza-Ramos MI, Garrido-Guerrero E, Méndez-Catalá CF, Méndez-Cruz AR, Pozo-Molina G. Hypohidrotic ectodermal dysplasia: clinical and molecular review. Int J Dermatol 2018; 57:965-972. [PMID: 29855039 DOI: 10.1111/ijd.14048] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/30/2016] [Revised: 03/06/2018] [Accepted: 04/23/2018] [Indexed: 12/30/2022]
Abstract
Hypohidrotic Ectodermal Dysplasia (HED) is a genetic human disorder which affects structures of ectodermal origin. Although there are autosomal recessive and dominant forms, X-linked (XL) is the most frequent form of the disease. This XL-HED phenotype is associated with mutations in the gene encoding the transmembrane protein ectodysplasin-1 (EDA1), a member of the TNFα-related signaling pathway. The proteins from this pathway are involved in signal transduction from ectoderm to mesenchyme leading to the development of ectoderm-derived structures in the fetus such as hair, teeth, skin, nails, and eccrine sweat glands. The aim of this review was to update the main clinical characteristics of HED regarding to recent molecular advances in the comprehension of all the possible genes involved in this group of disorders since it is known that Eda-A1-Edar signaling has multiple roles in ectodermal organ development, regulating their initiation, morphogenesis, and differentiation steps. The knowledge of the biological mechanisms that generate HED is needed for both a better detection of possible cases and for the design of efficient prevention and treatment approaches.
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Affiliation(s)
- Julia Reyes-Reali
- Laboratorio de Inmunología, Facultad de Estudios Superiores Iztacala, Universidad Nacional Autónoma de México, Tlalnepantla, Mexico
| | - María Isabel Mendoza-Ramos
- Laboratorio de Inmunología, Facultad de Estudios Superiores Iztacala, Universidad Nacional Autónoma de México, Tlalnepantla, Mexico
| | - Efraín Garrido-Guerrero
- Laboratorio de Investigación en Biología Molecular y Celular del Cáncer, Departamento de Genética y Biología Molecular, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Ciudad de México, Mexico
| | - Claudia F Méndez-Catalá
- Laboratorio Nacional de Enfermedades Crónico-Degenerativas/Unidad de Biomedicina (UBIMED), Facultad de Estudios Superiores Iztacala, Universidad Nacional Autónoma de México, Tlalnepantla, Mexico
| | - Adolfo R Méndez-Cruz
- Laboratorio de Inmunología, Facultad de Estudios Superiores Iztacala, Universidad Nacional Autónoma de México, Tlalnepantla, Mexico
| | - Glustein Pozo-Molina
- Carrera de Médico Cirujano, Facultad de Estudios Superiores Iztacala, Universidad Nacional Autónoma de México, Tlalnepantla, Mexico
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50
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Inoue Y, Shimizu A, Suto M, Kishi C, Takahashi A, Yasuda M, Iijima M, Arakawa H, Ishikawa O. Cutaneous squamous cell carcinoma, thyroid cancer and Langerhans cell histiocytosis in a patient with X-linked recessive Mendelian susceptibility to mycobacterial diseases with a nuclear factor-κB essential modifier mutation. J Dermatol 2018; 45:1017-1019. [PMID: 29797522 DOI: 10.1111/1346-8138.14482] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2018] [Accepted: 04/18/2018] [Indexed: 10/16/2022]
Abstract
Nuclear factor (NF)-κB essential modifier (NEMO), also known as IκB kinase subunit-γ (IKKγ), is a pivotal molecule in the NF-κB signaling pathway. Mutations of NEMO cause incontinentia pigmenti and X-linked ectodermal dysplasia with immunodeficiency. Mendelian susceptibility to mycobacterial diseases (MSMD), which confers an almost selective predisposition to mycobacterial infection, is also caused by NEMO mutations. We herein report the first case of a patient with X-linked recessive (XR) MSMD who developed cutaneous squamous cell carcinoma, thyroid cancer and Langerhans cell histiocytosis. The relationship between NEMO mutation and oncogenesis is discussed.
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Affiliation(s)
- Yuta Inoue
- Department of Dermatology, Gunma University Graduate School of Medicine, Maebashi, Japan
| | - Akira Shimizu
- Department of Dermatology, Gunma University Graduate School of Medicine, Maebashi, Japan
| | - Mariko Suto
- Department of Dermatology, Gunma University Graduate School of Medicine, Maebashi, Japan
| | - Chikako Kishi
- Department of Dermatology, Gunma University Graduate School of Medicine, Maebashi, Japan
| | - Ayumi Takahashi
- Department of Dermatology, Gunma University Graduate School of Medicine, Maebashi, Japan
| | - Masahito Yasuda
- Department of Dermatology, Gunma University Graduate School of Medicine, Maebashi, Japan
| | - Mayuko Iijima
- Department of Pediatrics, Gunma University Graduate School of Medicine, Maebashi, Japan
| | - Hirokazu Arakawa
- Department of Pediatrics, Gunma University Graduate School of Medicine, Maebashi, Japan
| | - Osamu Ishikawa
- Department of Dermatology, Gunma University Graduate School of Medicine, Maebashi, Japan
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