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Zheng S, He S, Liang Y, Liu Q, Liu T, Tan Y, Peng T, Huang C, Gao H, Lu X. NME4 suppresses NFκB2-CCL5 axis, restricting CD8+ T cell tumour infiltration in oesophageal squamous cell carcinoma. Immunology 2024. [PMID: 39016535 DOI: 10.1111/imm.13838] [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: 02/23/2024] [Accepted: 07/04/2024] [Indexed: 07/18/2024] Open
Abstract
Thought of as a metastasis-associated gene, however, NME/NM23 nucleoside diphosphate kinase 4 (NME4) has rarely been described in the context of the tumour microenvironment. To understand the immunological implications of NME4 in oesophageal squamous cell carcinoma (ESCC), we used multiplex immunohistochemistry to analyse the clinicopathological and prognostic importance of NME4 expression. Then, after establishing a syngeneic tumour model with a C57BL/6 mouse strain that can recapitulate the tumour microenvironment of humans, we examined the immunological involvement of NME4 expression. To explore the underlying molecular mechanism, via quantitative proteomics and protein microarray screening, we investigated the potential signalling pathways involved. The clinicopathological and prognostic importance of NME4 expression is limited in ESCC patients. In vivo, single-cell RNA sequencing showed that NME4 strikingly prevented CD8+ T cells from infiltrating the tumour microenvironment in murine ESCC. Mechanistically, we mapped out the NFκB2-CCL5 axis that was negatively controlled by NME4 in the murine ESCC cell line AKR. Collectively, these data demonstrated that regulation of NFκB2-CCL5 axis by NME4 prevents CD8+ T cells infiltration in ESCC.
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Affiliation(s)
- Shutao Zheng
- State Key Laboratory of Pathogenesis, Prevention, Treatment of Central Asian High Incidence Diseases, Clinical Medical Research Institute, First Affiliated Hospital of Xinjiang Medical University, Urumqi, People's Republic of China
| | - Shuo He
- State Key Laboratory of Pathogenesis, Prevention, Treatment of Central Asian High Incidence Diseases, Clinical Medical Research Institute, First Affiliated Hospital of Xinjiang Medical University, Urumqi, People's Republic of China
| | - Yan Liang
- State Key Laboratory of Pathogenesis, Prevention, Treatment of Central Asian High Incidence Diseases, Clinical Medical Research Institute, First Affiliated Hospital of Xinjiang Medical University, Urumqi, People's Republic of China
| | - Qing Liu
- State Key Laboratory of Pathogenesis, Prevention, Treatment of Central Asian High Incidence Diseases, Clinical Medical Research Institute, First Affiliated Hospital of Xinjiang Medical University, Urumqi, People's Republic of China
| | - Tao Liu
- Department of Clinical Laboratory, First Affiliated Hospital of Xinjiang Medical University, Urumqi, People's Republic of China
| | - Yiyi Tan
- State Key Laboratory of Pathogenesis, Prevention, Treatment of Central Asian High Incidence Diseases, Clinical Medical Research Institute, First Affiliated Hospital of Xinjiang Medical University, Urumqi, People's Republic of China
| | - Tianyuan Peng
- State Key Laboratory of Pathogenesis, Prevention, Treatment of Central Asian High Incidence Diseases, Clinical Medical Research Institute, First Affiliated Hospital of Xinjiang Medical University, Urumqi, People's Republic of China
| | - Conggai Huang
- Department of Pathology, The Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan, People's Republic of China
| | - Haidong Gao
- Genepioneer Biotechnologies Co. Ltd., Nanjing, Jiangsu, People's Republic of China
| | - Xiaomei Lu
- State Key Laboratory of Pathogenesis, Prevention, Treatment of Central Asian High Incidence Diseases, Clinical Medical Research Institute, First Affiliated Hospital of Xinjiang Medical University, Urumqi, People's Republic of China
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2
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McKenzie M, Lian GY, Pennel KA, Quinn JA, Jamieson NB, Edwards J. NFκB signalling in colorectal cancer: Examining the central dogma of IKKα and IKKβ signalling. Heliyon 2024; 10:e32904. [PMID: 38975078 PMCID: PMC11226910 DOI: 10.1016/j.heliyon.2024.e32904] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2024] [Revised: 05/20/2024] [Accepted: 06/11/2024] [Indexed: 07/09/2024] Open
Abstract
The NFκB pathway, known as the central regulator of inflammation, has a well-established role in colorectal cancer (CRC) initiation, progression, and therapy resistance. Due to the pathway's overarching roles in CRC, there have been efforts to characterise NFκB family members and target the pathway for therapeutic intervention. Initial research illustrated that the canonical NFκB pathway, driven by central kinase IKKβ, was a promising target for drug intervention. However, dose limiting toxicities and specificity concerns have resulted in failure of IKKβ inhibitors in clinical trials. The field has turned to look at targeting the less dominant kinase, IKKα, which along with NFκB inducing kinase (NIK), drives the lesser researched non-canonical NFκB pathway. However prognostic studies of the non-canonical pathway have produced conflicting results. There is emerging evidence that IKKα is involved in other signalling pathways, which lie outside of canonical and non-canonical NFκB signalling. Evidence suggests that some of these alternative pathways involve a truncated form of IKKα, and this may drive poor cancer-specific survival in CRC. This review aims to explore the multiple components of NFκB signalling, highlighting that NIK may be the central kinase for non-canonical NFκB signalling, and that IKKα is involved in novel pathways which promote CRC.
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Affiliation(s)
- Molly McKenzie
- School of Cancer Sciences, Wolfson Wohl Cancer Research Centre, University of Glasgow, Glasgow, G61 1BD, UK
| | - Guang-Yu Lian
- School of Cancer Sciences, Wolfson Wohl Cancer Research Centre, University of Glasgow, Glasgow, G61 1BD, UK
| | - Kathryn A.F. Pennel
- School of Cancer Sciences, Wolfson Wohl Cancer Research Centre, University of Glasgow, Glasgow, G61 1BD, UK
| | - Jean A. Quinn
- School of Cancer Sciences, Wolfson Wohl Cancer Research Centre, University of Glasgow, Glasgow, G61 1BD, UK
| | - Nigel B. Jamieson
- School of Cancer Sciences, Wolfson Wohl Cancer Research Centre, University of Glasgow, Glasgow, G61 1BD, UK
| | - Joanne Edwards
- School of Cancer Sciences, Wolfson Wohl Cancer Research Centre, University of Glasgow, Glasgow, G61 1BD, UK
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3
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Riller Q, Sorin B, Courteille C, Ho-Nhat D, Voyer TL, Debray JC, Stolzenberg MC, Pellé O, Becquard T, Riestra MR, Berteloot L, Migaud M, Delage L, Jeanpierre M, Boussard C, Brunaud C, Magérus A, Michel V, Roux C, Picard C, Masson C, Bole-Feysot C, Cagnard N, Corneau A, Meyts I, Baud V, Casanova JL, Fischer A, Dejardin E, Puel A, Boulanger C, Neven B, Rieux-Laucat F. Compound heterozygous mutations in the kinase domain of IKKα lead to immunodeficiency and immune dysregulation. MEDRXIV : THE PREPRINT SERVER FOR HEALTH SCIENCES 2024:2024.05.17.24307356. [PMID: 38798321 PMCID: PMC11118628 DOI: 10.1101/2024.05.17.24307356] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2024]
Abstract
IKKα, encoded by CHUK , is crucial in the non-canonical NF-κB pathway and part of the IKK complex activating the canonical pathway alongside IKKβ. Absence of IKKα cause fetal encasement syndrome in human, fatal in utero, while an impaired IKKα-NIK interaction was reported in a single patient and cause combined immunodeficiency. Here, we describe compound heterozygous variants in the kinase domain of IKKα in a female patient with hypogammaglobulinemia, recurrent lung infections, and Hay-Wells syndrome-like features. We showed that both variants were loss-of-function. Non-canonical NF-κB activation was profoundly diminished in stromal and immune cells while the canonical pathway was partially impaired. Reintroducing wild-type CHUK restored non-canonical NF-κB activation. The patient had neutralizing autoantibodies against type I IFN, akin to non-canonical NF-κB pathway deficiencies. Thus, this is the first case of bi-allelic CHUK mutations disrupting IKKα kinase function, broadening non-canonical NF-κB defect understanding and suggesting IKKα's role in canonical NF-κB target gene expression in human.
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4
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Rodriguez BN, Huang H, Chia JJ, Hoffmann A. The noncanonical NFκB pathway: Regulatory mechanisms in health and disease. WIREs Mech Dis 2024:e1646. [PMID: 38634218 DOI: 10.1002/wsbm.1646] [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: 10/31/2023] [Revised: 03/29/2024] [Accepted: 04/01/2024] [Indexed: 04/19/2024]
Abstract
The noncanonical NFκB signaling pathway mediates the biological functions of diverse cell survival, growth, maturation, and differentiation factors that are important for the development and maintenance of hematopoietic cells and immune organs. Its dysregulation is associated with a number of immune pathologies and malignancies. Originally described as the signaling pathway that controls the NFκB family member RelB, we now know that noncanonical signaling also controls NFκB RelA and cRel. Here, we aim to clarify our understanding of the molecular network that mediates noncanonical NFκB signaling and review the human diseases that result from a deficient or hyper-active noncanonical NFκB pathway. It turns out that dysregulation of RelA and cRel, not RelB, is often implicated in mediating the resulting pathology. This article is categorized under: Immune System Diseases > Molecular and Cellular Physiology Cancer > Molecular and Cellular Physiology Immune System Diseases > Stem Cells and Development.
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Affiliation(s)
- Benancio N Rodriguez
- Department of Microbiology, Immunology, and Molecular Genetics, University of California, Los Angeles, California, USA
- Molecular Biology Institute, University of California, Los Angeles, California, USA
| | - Helen Huang
- Department of Microbiology, Immunology, and Molecular Genetics, University of California, Los Angeles, California, USA
- Institute for Quantitative and Computational Biosciences, University of California, Los Angeles, California, USA
| | - Jennifer J Chia
- Department of Microbiology, Immunology, and Molecular Genetics, University of California, Los Angeles, California, USA
- Molecular Biology Institute, University of California, Los Angeles, California, USA
- Department of Pathology and Laboratory Medicine, University of California, Los Angeles, California, USA
| | - Alexander Hoffmann
- Department of Microbiology, Immunology, and Molecular Genetics, University of California, Los Angeles, California, USA
- Molecular Biology Institute, University of California, Los Angeles, California, USA
- Institute for Quantitative and Computational Biosciences, University of California, Los Angeles, California, USA
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5
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Kamińska J, Tylicka M, Sutkowska K, Gacuta KM, Sawicka MM, Kowalewska E, Ćwiklińska-Dworakowska M, Maciejczyk M, Łysoń T, Kornhuber J, Lewczuk P, Matowicka-Karna J, Koper-Lenkiewicz OM. The preliminary study suggests an association between NF-ĸB pathway activation and increased plasma 20S proteasome activity in intracranial aneurysm patients. Sci Rep 2024; 14:3941. [PMID: 38366068 PMCID: PMC10873410 DOI: 10.1038/s41598-024-54692-8] [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: 11/03/2023] [Accepted: 02/15/2024] [Indexed: 02/18/2024] Open
Abstract
The significant role of increased activation of 20S proteasomes in the development of abdominal aortic aneurysms has been well-established in a mouse model. The available literature lacks similar studies concerning brain aneurysms. The aim of the study was to verify the hypothesis that patients with unruptured intracranial aneurysms (UIA) have increased 20S proteasome ChT-L activity compared to the control group of individuals without vascular lesions in the brain. In the next step, the relationship between the activity of 20S proteasomes ChT-L and precursor proteins from the nuclear factor kappa-light-chain-enhancer of activated B cells (NF-κB) family, namely NF-κB1 (p105), NF-κB2 (p100), NF-κB p65, and the inflammatory chemokine MCP-1, was examined. Patients with UIA had significantly higher 20S ChT-L proteasome activity compared to the control group. Patients with multiple aneurysms had significantly higher 20S proteasome ChT-L activity compared to those with single aneurysms. In patients with UIA, the activity of the 20S proteasome ChT-L negatively correlated with the concentration of NF-κB1 (p105) and NF-κB p65 precursor proteins and positively correlated with the concentration of the cerebrospinal fluid chemokine MCP-1. Our results may suggest that increased 20S proteasome ChT-L activity in UIA patients modulates inflammation in the cerebral arterial vessel via the MCP-1 chemokine as a result of activation of the canonical NF-κB pathway.
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Affiliation(s)
- Joanna Kamińska
- Department of Clinical Laboratory Diagnostics, Medical University of Bialystok, 15A Jerzego Waszyngtona St., 15-269, Białystok, Poland.
| | - Marzena Tylicka
- Department of Biophysics, Medical University of Bialystok, 2A Adama Mickiewicza St., 15-089, Białystok, Poland
| | - Kinga Sutkowska
- Department of Clinical Laboratory Diagnostics, Clinical Hospital of the Medical University of Bialystok, 15A Jerzego Waszyngtona St., 15-269, Białystok, Poland
| | - Karolina Marta Gacuta
- Department of Clinical Laboratory Diagnostics, Clinical Hospital of the Medical University of Bialystok, 15A Jerzego Waszyngtona St., 15-269, Białystok, Poland
| | - Magdalena Maria Sawicka
- Department of Analysis and Bioanalysis of Medicines, Medical University of Bialystok, 2D Mickiewicza St., 15-222, Białystok, Poland
| | - Ewa Kowalewska
- Department of Clinical Laboratory Diagnostics, Clinical Hospital of the Medical University of Bialystok, 15A Jerzego Waszyngtona St., 15-269, Białystok, Poland
| | - Magdalena Ćwiklińska-Dworakowska
- Department of Oncological Surgery and General Surgery, Independent Public Health Care Facility of the Ministry of the Interior and Administration in Bialystok named Marian Zyndram-Kościałkowski, 27 Fabryczna St., 15-471, Białystok, Poland
| | - Mateusz Maciejczyk
- Department of Hygiene, Epidemiology, and Ergonomics, Medical University of Białystok, 2C Mickiewicza St., 15-022, Białystok, Poland
| | - Tomasz Łysoń
- Department of Neurosurgery, Medical University of Bialystok/Clinical Hospital of the Medical University of Bialystok, 24A Marii Skłodowskiej-Curie St., 15-276, Białystok, Poland
| | - Johannes Kornhuber
- Department of Psychiatry and Psychotherapy, University Hospital Erlangen, and Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Piotr Lewczuk
- Department of Psychiatry and Psychotherapy, University Hospital Erlangen, and Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
- Department of Neurodegeneration Diagnostics, Medical University of Bialystok, 15A Jerzego Waszyngtona St., 15-269, Białystok, Poland
| | - Joanna Matowicka-Karna
- Department of Clinical Laboratory Diagnostics, Medical University of Bialystok, 15A Jerzego Waszyngtona St., 15-269, Białystok, Poland
| | - Olga Martyna Koper-Lenkiewicz
- Department of Clinical Laboratory Diagnostics, Medical University of Bialystok, 15A Jerzego Waszyngtona St., 15-269, Białystok, Poland.
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6
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Mukherjee T, Kumar N, Chawla M, Philpott DJ, Basak S. The NF-κB signaling system in the immunopathogenesis of inflammatory bowel disease. Sci Signal 2024; 17:eadh1641. [PMID: 38194476 DOI: 10.1126/scisignal.adh1641] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Accepted: 12/11/2023] [Indexed: 01/11/2024]
Abstract
Inflammatory bowel disease (IBD) is an idiopathic, chronic condition characterized by episodes of inflammation in the gastrointestinal tract. The nuclear factor κB (NF-κB) system describes a family of dimeric transcription factors. Canonical NF-κB signaling is stimulated by and enhances inflammation, whereas noncanonical NF-κB signaling contributes to immune organogenesis. Dysregulation of NF-κB factors drives various inflammatory pathologies, including IBD. Signals from many immune sensors activate NF-κB subunits in the intestine, which maintain an equilibrium between local microbiota and host responses. Genetic association studies of patients with IBD and preclinical mouse models confirm the importance of the NF-κB system in host defense in the gut. Other studies have investigated the roles of these factors in intestinal barrier function and in inflammatory gut pathologies associated with IBD. NF-κB signaling modulates innate and adaptive immune responses and the production of immunoregulatory proteins, anti-inflammatory cytokines, antimicrobial peptides, and other tolerogenic factors in the intestine. Furthermore, genetic studies have revealed critical cell type-specific roles for NF-κB proteins in intestinal immune homeostasis, inflammation, and restitution that contribute to the etiopathology of IBD-associated manifestations. Here, we summarize our knowledge of the roles of these NF-κB pathways, which are activated in different intestinal cell types by specific ligands, and their cross-talk, in fueling aberrant intestinal inflammation. We argue that an in-depth understanding of aberrant immune signaling mechanisms may hold the key to identifying predictive or prognostic biomarkers and developing better therapeutics against inflammatory gut pathologies.
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Affiliation(s)
- Tapas Mukherjee
- Systems Immunology Laboratory, National Institute of Immunology, Aruna Asaf Ali Marg, New Delhi 110067, India
- Department of Immunology, University of Toronto, Toronto, ON M5S 1A8, Canada
| | - Naveen Kumar
- Systems Immunology Laboratory, National Institute of Immunology, Aruna Asaf Ali Marg, New Delhi 110067, India
| | - Meenakshi Chawla
- Systems Immunology Laboratory, National Institute of Immunology, Aruna Asaf Ali Marg, New Delhi 110067, India
| | - Dana J Philpott
- Department of Immunology, University of Toronto, Toronto, ON M5S 1A8, Canada
| | - Soumen Basak
- Systems Immunology Laboratory, National Institute of Immunology, Aruna Asaf Ali Marg, New Delhi 110067, India
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7
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Roy K, Chakraborty M, Kumar A, Manna AK, Roy NS. The NFκB signaling system in the generation of B-cell subsets: from germinal center B cells to memory B cells and plasma cells. Front Immunol 2023; 14:1185597. [PMID: 38169968 PMCID: PMC10758606 DOI: 10.3389/fimmu.2023.1185597] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2023] [Accepted: 11/09/2023] [Indexed: 01/05/2024] Open
Abstract
Memory B cells and antibody-secreting cells are the two prime effector B cell populations that drive infection- and vaccine-induced long-term antibody-mediated immunity. The antibody-mediated immunity mostly relies on the formation of specialized structures within secondary lymphoid organs, called germinal centers (GCs), that facilitate the interactions between B cells, T cells, and antigen-presenting cells. Antigen-activated B cells may proliferate and differentiate into GC-independent plasmablasts and memory B cells or differentiate into GC B cells. The GC B cells undergo proliferation coupled to somatic hypermutation of their immunoglobulin genes for antibody affinity maturation. Subsequently, affinity mature GC B cells differentiate into GC-dependent plasma cells and memory B cells. Here, we review how the NFκB signaling system controls B cell proliferation and the generation of GC B cells, plasmablasts/plasma cells, and memory B cells. We also identify and discuss some important unanswered questions in this connection.
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Affiliation(s)
- Koushik Roy
- Division of Microbiology and Immunology, Department of Pathology, School of Medicine, University of Utah, Salt Lake City, UT, United States
| | - Mainak Chakraborty
- Division of Immunology, Indian Council of Medical Research-National Institute of Cholera and Enteric Diseases, Kolkata, India
| | - Ashok Kumar
- Division of Microbiology and Immunology, Department of Pathology, School of Medicine, University of Utah, Salt Lake City, UT, United States
| | - Asit Kumar Manna
- Division of Microbiology and Immunology, Department of Pathology, School of Medicine, University of Utah, Salt Lake City, UT, United States
- Huntsman Cancer Institute, University of Utah School of Medicine, Salt Lake City, UT, United States
| | - Neeladri Sekhar Roy
- Department of Biochemistry, School of Medicine, Emory University, Atlanta, GA, United States
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8
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Son M, Wang AG, Keisham B, Tay S. Processing stimulus dynamics by the NF-κB network in single cells. Exp Mol Med 2023; 55:2531-2540. [PMID: 38040923 PMCID: PMC10766959 DOI: 10.1038/s12276-023-01133-7] [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: 05/08/2023] [Revised: 08/27/2023] [Accepted: 09/18/2023] [Indexed: 12/03/2023] Open
Abstract
Cells at the site of an infection experience numerous biochemical signals that vary in amplitude, space, and time. Despite the diversity of dynamic signals produced by pathogens and sentinel cells, information-processing pathways converge on a limited number of central signaling nodes to ultimately control cellular responses. In particular, the NF-κB pathway responds to dozens of signals from pathogens and self, and plays a vital role in processing proinflammatory inputs. Studies addressing the influence of stimulus dynamics on NF-κB signaling are rare due to technical limitations with live-cell measurements. However, recent advances in microfluidics, automation, and image analysis have enabled investigations that yield high temporal resolution at the single-cell level. Here, we summarize the recent research which measures and models the NF-κB response to pulsatile and fluctuating stimulus concentrations, as well as different combinations and sequences of signaling molecules. Collectively, these studies show that the NF-κB network integrates external inflammatory signals and translates these into downstream transcriptional responses.
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Affiliation(s)
- Minjun Son
- Pritzker School of Molecular Engineering, University of Chicago, Chicago, IL, 60637, USA.
- Institute for Genomics and Systems Biology, University of Chicago, Chicago, IL, 60637, USA.
| | - Andrew G Wang
- Pritzker School of Molecular Engineering, University of Chicago, Chicago, IL, 60637, USA
- Medical Scientist Training Program, University of Chicago, Chicago, IL, 60637, USA
| | - Bijentimala Keisham
- Pritzker School of Molecular Engineering, University of Chicago, Chicago, IL, 60637, USA
- Institute for Genomics and Systems Biology, University of Chicago, Chicago, IL, 60637, USA
| | - Savaş Tay
- Pritzker School of Molecular Engineering, University of Chicago, Chicago, IL, 60637, USA.
- Institute for Genomics and Systems Biology, University of Chicago, Chicago, IL, 60637, USA.
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9
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Pickering S, Sumner J, Kerridge C, Perera M, Neil S. Differential dysregulation of β-TrCP1 and -2 by HIV-1 Vpu leads to inhibition of canonical and non-canonical NF-κB pathways in infected cells. mBio 2023; 14:e0329322. [PMID: 37341489 PMCID: PMC10470808 DOI: 10.1128/mbio.03293-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2022] [Accepted: 04/03/2023] [Indexed: 06/22/2023] Open
Abstract
The HIV-1 Vpu protein is expressed late in the virus lifecycle to promote infectious virus production and avoid innate and adaptive immunity. This includes the inhibition of the NF-κB pathway which, when activated, leads to the induction of inflammatory responses and the promotion of antiviral immunity. Here we demonstrate that Vpu can inhibit both canonical and non-canonical NF-κB pathways, through the direct inhibition of the F-box protein β-TrCP, the substrate recognition portion of the Skp1-Cul1-F-box (SCF)β-TrCP ubiquitin ligase complex. There are two paralogues of β-TrCP (β-TrCP1/BTRC and β-TrCP2/FBXW11), encoded on different chromosomes, which appear to be functionally redundant. Vpu, however, is one of the few β-TrCP substrates to differentiate between the two paralogues. We have found that patient-derived alleles of Vpu, unlike those from lab-adapted viruses, trigger the degradation of β-TrCP1 while co-opting its paralogue β-TrCP2 for the degradation of cellular targets of Vpu, such as CD4. The potency of this dual inhibition correlates with stabilization of the classical IκBα and the phosphorylated precursors of the mature DNA-binding subunits of canonical and non-canonical NF-κB pathways, p105/NFκB1 and p100/NFκB2, in HIV-1 infected CD4+ T cells. Both precursors act as alternative IκBs in their own right, thus reinforcing NF-κB inhibition at steady state and upon activation with either selective canonical or non-canonical NF-κB stimuli. These data reveal the complex regulation of NF-κB late in the viral replication cycle, with consequences for both the pathogenesis of HIV/AIDS and the use of NF-κB-modulating drugs in HIV cure strategies. IMPORTANCE The NF-κB pathway regulates host responses to infection and is a common target of viral antagonism. The HIV-1 Vpu protein inhibits NF-κB signaling late in the virus lifecycle, by binding and inhibiting β-TrCP, the substrate recognition portion of the ubiquitin ligase responsible for inducing IκB degradation. Here we demonstrate that Vpu simultaneously inhibits and exploits the two different paralogues of β-TrCP by triggering the degradation of β-TrCP1 and co-opting β-TrCP2 for the destruction of its cellular targets. In so doing, it has a potent inhibitory effect on both the canonical and non-canonical NF-κB pathways. This effect has been underestimated in previous mechanistic studies due to the use of Vpu proteins from lab-adapted viruses. Our findings reveal previously unappreciated differences in the β-TrCP paralogues, revealing functional insights into the regulation of these proteins. This study also raises important implications for the role of NF-κB inhibition in the immunopathogenesis of HIV/AIDS and the way that this may impact on HIV latency reversal strategies based on the activation of the non-canonical NF-κB pathway.
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Affiliation(s)
- Suzanne Pickering
- Department of Infectious Diseases, School of Immunology and Microbial Sciences, King’s College London, London, United Kingdom
| | - Jonathan Sumner
- Department of Infectious Diseases, School of Immunology and Microbial Sciences, King’s College London, London, United Kingdom
| | - Claire Kerridge
- Department of Infectious Diseases, School of Immunology and Microbial Sciences, King’s College London, London, United Kingdom
| | - Marianne Perera
- Department of Infectious Diseases, School of Immunology and Microbial Sciences, King’s College London, London, United Kingdom
| | - Stuart Neil
- Department of Infectious Diseases, School of Immunology and Microbial Sciences, King’s College London, London, United Kingdom
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10
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McIntosh K, Khalaf YH, Craig R, West C, McCulloch A, Waghmare A, Lawson C, Chan EYW, Mackay S, Paul A, Plevin R. IL-1β stimulates a novel, IKKα -dependent, NIK -independent activation of non-canonical NFκB signalling. Cell Signal 2023; 107:110684. [PMID: 37080443 DOI: 10.1016/j.cellsig.2023.110684] [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: 10/04/2022] [Revised: 04/13/2023] [Accepted: 04/17/2023] [Indexed: 04/22/2023]
Abstract
In this study, we examined the activation of non-canonical nuclear factor Kappa B (NFκB) signalling in U2OS cells, a cellular metastatic bone cancer model. Whilst Lymphotoxin α1β2 (LTα1β2) stimulated the expected slow, delayed, sustained activation of serine 866/870 p100 phosphorylation and increased cellular expression of p52 NFκB, we found that canonical agonists, Interleukin-1β (IL-1β) and also Tumour necrosis factor-α (TNFα) generated a rapid transient increase in pp100, which was maximal by 15-30 min. This rapid phosphorylation was also observed in other cells types, such as DU145 and HCAECs suggesting the phenomenon is universal. IKKα deletion using CRISPR/Cas9 revealed an IKKα-dependent mechanism for serine 866/870 and additionally serine 872 p100 phosphorylation for both IL-1β and LTα1β2. In contrast, knockdown of IKKβ using siRNA or pharmacological inhibition of IKKβ activity was without effect on p100 phosphorylation. Pre-incubation of cells with the NFκB inducing-kinase (NIK) inhibitor, CW15337, had no effect on IL-1β induced phosphorylation of p100 however, the response to LTα1β2 was virtually abolished. Surprisingly IL-1β also stimulated p52 nuclear translocation as early as 60 min, this response and the concomitant p65 translocation was partially reduced by IKKα deletion. Furthermore, p52 nuclear translocation was unaffected by CW15337. In contrast, the response to LTα1β2 was essentially abolished by both IKKα deletion and CW15337. Taken together, these finding reveal novel forms of NFκB non-canonical signalling stimulated by ligands that activate the canonical NFκB pathway strongly such as IL-1β.
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Affiliation(s)
- Kathryn McIntosh
- Strathclyde Institute for Biomedical Sciences, University of Strathclyde, 161 Cathedral Street, Glasgow, G4 0RE Scotland, UK.
| | - Yousif H Khalaf
- Strathclyde Institute for Biomedical Sciences, University of Strathclyde, 161 Cathedral Street, Glasgow, G4 0RE Scotland, UK
| | - Rachel Craig
- Strathclyde Institute for Biomedical Sciences, University of Strathclyde, 161 Cathedral Street, Glasgow, G4 0RE Scotland, UK
| | - Christopher West
- Strathclyde Institute for Biomedical Sciences, University of Strathclyde, 161 Cathedral Street, Glasgow, G4 0RE Scotland, UK
| | - Ashley McCulloch
- Strathclyde Institute for Biomedical Sciences, University of Strathclyde, 161 Cathedral Street, Glasgow, G4 0RE Scotland, UK
| | - Ajay Waghmare
- Strathclyde Institute for Biomedical Sciences, University of Strathclyde, 161 Cathedral Street, Glasgow, G4 0RE Scotland, UK
| | - Christopher Lawson
- Strathclyde Institute for Biomedical Sciences, University of Strathclyde, 161 Cathedral Street, Glasgow, G4 0RE Scotland, UK
| | - Edmond Y W Chan
- Department of Biomedical and Molecular sciences, Queens University, Botterell Hall, Room 563, 18 Stuart Street, Kingston, ON K7L 3N6, Canada
| | - Simon Mackay
- Strathclyde Institute for Biomedical Sciences, University of Strathclyde, 161 Cathedral Street, Glasgow, G4 0RE Scotland, UK
| | - Andrew Paul
- Strathclyde Institute for Biomedical Sciences, University of Strathclyde, 161 Cathedral Street, Glasgow, G4 0RE Scotland, UK
| | - Robin Plevin
- Strathclyde Institute for Biomedical Sciences, University of Strathclyde, 161 Cathedral Street, Glasgow, G4 0RE Scotland, UK.
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11
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Bernal GM, Wu L, Voce DJ, Weichselbaum RR, Yamini B. p52 signaling promotes cellular senescence. Cell Biosci 2022; 12:43. [PMID: 35379326 PMCID: PMC8981737 DOI: 10.1186/s13578-022-00779-6] [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: 11/11/2021] [Accepted: 03/27/2022] [Indexed: 11/24/2022] Open
Abstract
Background Nuclear factor-κB is a multi-subunit transcription factor that plays a central role in cellular senescence. We previously reported that an increase in the p52 subunit is seen in senescent cells and aged tissue. In the current work, we examined the mechanism by which p52 is activated and whether the increase in p52 promotes senescence. Results Using both primary mouse embryonic fibroblasts (MEFs) and WI-38 human lung fibroblasts, we examined cells after serial passage and following prolonged culture. An increase in p52 was found in the nucleus relative to pre-senescent cells. The increase in p52 protein was not reflected by an increase in NFKB2 mRNA or by an increase in the abundance of upstream activating kinases, IKKα and NIK. To examine whether p52 promotes senescence, we over-expressed mature p52 in primary MEFs. Significantly more senescence was seen compared to control, a finding not seen with p52 mutated at critical DNA binding residues. In addition, blocking p52 nuclear translocation with the peptide inhibitor, SN52, decreased β-galactosidase (β-gal) formation. Subsequent filtration studies demonstrated that proteins in conditioned media (CM) were necessary for the increase in p52 and mass spectrometry identified S100A4 and cyclophilin A (CYPA) as potential factors in CM necessary for induction of p52. The requirement of these proteins in CM for induction of p52 was confirmed using depletion and supplementation studies. In addition, we found that activation of STAT3 signaling was required for the increase in p52. Finally, genome wide ChIP-sequencing analysis confirmed that there is an increase in p52 chromatin enrichment with senescence and identified several downstream factors whose expression is regulated by increased p52 binding. Conclusions These results demonstrate that p52 nuclear translocation is increased in senescent cells by factors in conditioned media and that mature p52 induces cellular senescence. The data are consistent with the prior observation that p52 is elevated in aged tissue and support the hypothesis that p52 contributes to organismal aging. Supplementary information The online version contains supplementary material available at 10.1186/s13578-022-00779-6.
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12
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Walser M, Mayor J, Rothenberger S. Designed Ankyrin Repeat Proteins: A New Class of Viral Entry Inhibitors. Viruses 2022; 14:2242. [PMID: 36298797 PMCID: PMC9611651 DOI: 10.3390/v14102242] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2022] [Revised: 10/10/2022] [Accepted: 10/10/2022] [Indexed: 08/08/2023] Open
Abstract
Designed ankyrin repeat proteins (DARPins) are engineered proteins comprising consensus designed ankyrin repeats as scaffold. Tightly packed repeats form a continuous hydrophobic core and a large groove-like solvent-accessible surface that creates a binding surface. DARPin domains recognizing a target of interest with high specificity and affinity can be generated using a synthetic combinatorial library and in vitro selection methods. They can be linked together in a single molecule to build multispecific and multifunctional proteins without affecting expression or function. The modular architecture of DARPins offers unprecedented possibilities of design and opens avenues for innovative antiviral strategies.
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Affiliation(s)
- Marcel Walser
- Molecular Partners AG, Wagistrasse 14, 8952 Zurich-Schlieren, Switzerland
| | - Jennifer Mayor
- Spiez Laboratory, Federal Office for Civil Protection, Austrasse, 3700 Spiez, Switzerland
- Institute of Microbiology, University Hospital Center and University of Lausanne, Rue du Bugnon 48, 1011 Lausanne, Switzerland
| | - Sylvia Rothenberger
- Spiez Laboratory, Federal Office for Civil Protection, Austrasse, 3700 Spiez, Switzerland
- Institute of Microbiology, University Hospital Center and University of Lausanne, Rue du Bugnon 48, 1011 Lausanne, Switzerland
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13
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Hövelmeyer N, Schmidt-Supprian M, Ohnmacht C. NF-κB in control of regulatory T cell development, identity, and function. J Mol Med (Berl) 2022; 100:985-995. [PMID: 35672519 PMCID: PMC9213371 DOI: 10.1007/s00109-022-02215-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2022] [Revised: 05/02/2022] [Accepted: 05/03/2022] [Indexed: 12/11/2022]
Abstract
Regulatory T cells (Treg cells) act as a major rheostat regulating the strength of immune responses, enabling tolerance of harmless foreign antigens, and preventing the development of pathogenic immune responses in various disease settings such as cancer and autoimmunity. Treg cells are present in all lymphoid and non-lymphoid tissues, and the latter often fulfill important tasks required for the physiology of their host organ. The activation of NF-κB transcription factors is a central pathway for the reprogramming of gene expression in response to inflammatory but also homeostatic cues. Genetic mouse models have revealed essential functions for NF-κB transcription factors in modulating Treg development and function, with some of these mechanistic insights confirmed by recent studies analyzing Treg cells from patients harboring point mutations in the genes encoding NF-κB proteins. Molecular insights into the NF-κB pathway in Treg cells hold substantial promise for novel therapeutic strategies to manipulate dysfunctional or inadequate cell numbers of immunosuppressive Treg cells in autoimmunity or cancer. Here, we provide an overview of the manifold roles that NF-κB factors exert in Treg cells.
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Affiliation(s)
- Nadine Hövelmeyer
- Institute for Molecular Medicine, University Medical Center of the Johannes Gutenberg-University Mainz, Mainz, Germany.
- Germany Research Center for Immunotherapy (FZI), University Medical Center of the Johannes Gutenberg-University Mainz, Mainz, Germany.
| | - Marc Schmidt-Supprian
- Institute for Experimental Hematology, Center for Translational Cancer Research (TranslaTUM), School of Medicine, Technical University Munich, Munich, Germany.
- German Cancer Consortium (DKTK) and German Cancer Research Center (DKFZ), 69120, Heidelberg, Germany.
| | - Caspar Ohnmacht
- Center for Allergy and Environment (ZAUM), Technical University and Helmholtz Center Munich, Munich, Germany.
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14
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Ghosh G, Wang VYF. Origin of the Functional Distinctiveness of NF-κB/p52. Front Cell Dev Biol 2021; 9:764164. [PMID: 34888310 PMCID: PMC8650618 DOI: 10.3389/fcell.2021.764164] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Accepted: 11/05/2021] [Indexed: 11/13/2022] Open
Abstract
The transcription regulators of the NF-κB family have emerged as a critical factor affecting the function of various adult tissues. The NF-κB family transcription factors are homo- and heterodimers made up of five monomers (p50, p52, RelA, cRel and RelB). The family is distinguished by sequence homology in their DNA binding and dimerization domains, which enables them to bind similar DNA response elements and participate in similar biological programs through transcriptional activation and repression of hundreds of genes. Even though the family members are closely related in terms of sequence and function, they all display distinct activities. In this review, we discuss the sequence characteristics, protein and DNA interactions, and pathogenic involvement of one member of family, NF-κB/p52, relative to that of other members. We pinpoint the small sequence variations within the conserved region that are mostly responsible for its distinct functional properties.
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Affiliation(s)
- Gourisankar Ghosh
- Department of Biochemistry, University of California, San Diego, San Diego, CA, United States
| | - Vivien Ya-Fan Wang
- Faculty of Health Sciences, University of Macau, Taipa, Macau SAR, China.,Cancer Centre, Faculty of Health Sciences, University of Macau, Taipa, Macau SAR, China
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15
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Wirasinha RC, Davies AR, Srivastava M, Sheridan JM, Sng XYX, Delmonte OM, Dobbs K, Loh KL, Miosge LA, Lee CE, Chand R, Chan A, Yap JY, Keller MD, Chen K, Rossjohn J, La Gruta NL, Vinuesa CG, Reid HH, Lionakis MS, Notarangelo LD, Gray DHD, Goodnow CC, Cook MC, Daley SR. Nfkb2 variants reveal a p100-degradation threshold that defines autoimmune susceptibility. J Exp Med 2021; 218:211502. [PMID: 33107914 PMCID: PMC7595743 DOI: 10.1084/jem.20200476] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2020] [Revised: 06/16/2020] [Accepted: 08/21/2020] [Indexed: 12/31/2022] Open
Abstract
NF-κB2/p100 (p100) is an inhibitor of κB (IκB) protein that is partially degraded to produce the NF-κB2/p52 (p52) transcription factor. Heterozygous NFKB2 mutations cause a human syndrome of immunodeficiency and autoimmunity, but whether autoimmunity arises from insufficiency of p52 or IκB function of mutated p100 is unclear. Here, we studied mice bearing mutations in the p100 degron, a domain that harbors most of the clinically recognized mutations and is required for signal-dependent p100 degradation. Distinct mutations caused graded increases in p100-degradation resistance. Severe p100-degradation resistance, due to inheritance of one highly degradation-resistant allele or two subclinical alleles, caused thymic medullary hypoplasia and autoimmune disease, whereas the absence of p100 and p52 did not. We inferred a similar mechanism occurs in humans, as the T cell receptor repertoires of affected humans and mice contained a hydrophobic signature of increased self-reactivity. Autoimmunity in autosomal dominant NFKB2 syndrome arises largely from defects in nonhematopoietic cells caused by the IκB function of degradation-resistant p100.
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Affiliation(s)
- Rushika C Wirasinha
- Infection and Immunity Program, Monash Biomedicine Discovery Institute and Department of Biochemistry and Molecular Biology, Monash University, Clayton, Australia
| | - Ainsley R Davies
- Department of Immunology and Infectious Disease, John Curtin School of Medical Research, Australian National University, Canberra, Australia.,Translational Research Unit, Department of Immunology, The Canberra Hospital, Canberra, Australia.,Centre for Personalised Immunology (NHMRC Centre of Research Excellence), John Curtin School of Medical Research, Australian National University, Canberra, Australia
| | - Monika Srivastava
- Department of Immunology and Infectious Disease, John Curtin School of Medical Research, Australian National University, Canberra, Australia
| | - Julie M Sheridan
- Walter and Eliza Hall Institute of Medical Research, Melbourne, Australia.,Department of Medical Biology, University of Melbourne, Melbourne, Australia
| | - Xavier Y X Sng
- Infection and Immunity Program, Monash Biomedicine Discovery Institute and Department of Biochemistry and Molecular Biology, Monash University, Clayton, Australia
| | - Ottavia M Delmonte
- Laboratory of Clinical Immunology and Microbiology, Division of Intramural Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD
| | - Kerry Dobbs
- Laboratory of Clinical Immunology and Microbiology, Division of Intramural Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD
| | - Khai L Loh
- Infection and Immunity Program, Monash Biomedicine Discovery Institute and Department of Biochemistry and Molecular Biology, Monash University, Clayton, Australia
| | - Lisa A Miosge
- Department of Immunology and Infectious Disease, John Curtin School of Medical Research, Australian National University, Canberra, Australia
| | - Cindy Eunhee Lee
- Department of Immunology and Infectious Disease, John Curtin School of Medical Research, Australian National University, Canberra, Australia.,Translational Research Unit, Department of Immunology, The Canberra Hospital, Canberra, Australia
| | - Rochna Chand
- Department of Immunology and Infectious Disease, John Curtin School of Medical Research, Australian National University, Canberra, Australia.,Translational Research Unit, Department of Immunology, The Canberra Hospital, Canberra, Australia
| | - Anna Chan
- Infection and Immunity Program, Monash Biomedicine Discovery Institute and Department of Biochemistry and Molecular Biology, Monash University, Clayton, Australia
| | - Jin Yan Yap
- Department of Immunology and Infectious Disease, John Curtin School of Medical Research, Australian National University, Canberra, Australia
| | - Michael D Keller
- Division of Allergy and Immunology, Children's National Medical Center, Washington, DC
| | - Karin Chen
- Department of Pediatrics, University of Utah, Salt Lake City, UT.,Department of Pediatrics, Seattle Children's Hospital, University of Washington School of Medicine, Seattle, WA
| | - Jamie Rossjohn
- Infection and Immunity Program, Monash Biomedicine Discovery Institute and Department of Biochemistry and Molecular Biology, Monash University, Clayton, Australia.,Australian Research Council Centre of Excellence in Advanced Molecular Imaging, Monash University, Clayton, Australia.,Institute of Infection and Immunity, Cardiff University School of Medicine, Heath Park, Cardiff, UK
| | - Nicole L La Gruta
- Infection and Immunity Program, Monash Biomedicine Discovery Institute and Department of Biochemistry and Molecular Biology, Monash University, Clayton, Australia
| | - Carola G Vinuesa
- Department of Immunology and Infectious Disease, John Curtin School of Medical Research, Australian National University, Canberra, Australia.,Centre for Personalised Immunology (NHMRC Centre of Research Excellence), John Curtin School of Medical Research, Australian National University, Canberra, Australia
| | - Hugh H Reid
- Infection and Immunity Program, Monash Biomedicine Discovery Institute and Department of Biochemistry and Molecular Biology, Monash University, Clayton, Australia.,Australian Research Council Centre of Excellence in Advanced Molecular Imaging, Monash University, Clayton, Australia
| | - Michail S Lionakis
- Fungal Pathogenesis Section, Laboratory of Clinical Immunology and Microbiology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD
| | - Luigi D Notarangelo
- Laboratory of Clinical Immunology and Microbiology, Division of Intramural Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD
| | - Daniel H D Gray
- Walter and Eliza Hall Institute of Medical Research, Melbourne, Australia.,Department of Medical Biology, University of Melbourne, Melbourne, Australia
| | - Christopher C Goodnow
- Garvan Institute of Medical Research & Cellular Genomics Futures Institute, University of New South Wales, Sydney, Australia
| | - Matthew C Cook
- Department of Immunology and Infectious Disease, John Curtin School of Medical Research, Australian National University, Canberra, Australia.,Translational Research Unit, Department of Immunology, The Canberra Hospital, Canberra, Australia.,Centre for Personalised Immunology (NHMRC Centre of Research Excellence), John Curtin School of Medical Research, Australian National University, Canberra, Australia
| | - Stephen R Daley
- Infection and Immunity Program, Monash Biomedicine Discovery Institute and Department of Biochemistry and Molecular Biology, Monash University, Clayton, Australia
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16
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Inhibitory feedback control of NF-κB signalling in health and disease. Biochem J 2021; 478:2619-2664. [PMID: 34269817 PMCID: PMC8286839 DOI: 10.1042/bcj20210139] [Citation(s) in RCA: 75] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2021] [Revised: 06/14/2021] [Accepted: 06/16/2021] [Indexed: 12/14/2022]
Abstract
Cells must adapt to changes in their environment to maintain cell, tissue and organismal integrity in the face of mechanical, chemical or microbiological stress. Nuclear factor-κB (NF-κB) is one of the most important transcription factors that controls inducible gene expression as cells attempt to restore homeostasis. It plays critical roles in the immune system, from acute inflammation to the development of secondary lymphoid organs, and also has roles in cell survival, proliferation and differentiation. Given its role in such critical processes, NF-κB signalling must be subject to strict spatiotemporal control to ensure measured and context-specific cellular responses. Indeed, deregulation of NF-κB signalling can result in debilitating and even lethal inflammation and also underpins some forms of cancer. In this review, we describe the homeostatic feedback mechanisms that limit and ‘re-set’ inducible activation of NF-κB. We first describe the key components of the signalling pathways leading to activation of NF-κB, including the prominent role of protein phosphorylation and protein ubiquitylation, before briefly introducing the key features of feedback control mechanisms. We then describe the array of negative feedback loops targeting different components of the NF-κB signalling cascade including controls at the receptor level, post-receptor signalosome complexes, direct regulation of the critical ‘inhibitor of κB kinases’ (IKKs) and inhibitory feedforward regulation of NF-κB-dependent transcriptional responses. We also review post-transcriptional feedback controls affecting RNA stability and translation. Finally, we describe the deregulation of these feedback controls in human disease and consider how feedback may be a challenge to the efficacy of inhibitors.
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17
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Chawla M, Mukherjee T, Deka A, Chatterjee B, Sarkar UA, Singh AK, Kedia S, Lum J, Dhillon MK, Banoth B, Biswas SK, Ahuja V, Basak S. An epithelial Nfkb2 pathway exacerbates intestinal inflammation by supplementing latent RelA dimers to the canonical NF-κB module. Proc Natl Acad Sci U S A 2021; 118:e2024828118. [PMID: 34155144 PMCID: PMC8237674 DOI: 10.1073/pnas.2024828118] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Aberrant inflammation, such as that associated with inflammatory bowel disease (IBD), is fueled by the inordinate activity of RelA/NF-κB factors. As such, the canonical NF-κB module mediates controlled nuclear activation of RelA dimers from the latent cytoplasmic complexes. What provokes pathological RelA activity in the colitogenic gut remains unclear. The noncanonical NF-κB pathway typically promotes immune organogenesis involving Nfkb2 gene products. Because NF-κB pathways are intertwined, we asked whether noncanonical signaling aggravated inflammatory RelA activity. Our investigation revealed frequent engagement of the noncanonical pathway in human IBD. In a mouse model of experimental colitis, we established that Nfkb2-mediated regulations escalated the RelA-driven proinflammatory gene response in intestinal epithelial cells, exacerbating the infiltration of inflammatory cells and colon pathologies. Our mechanistic studies clarified that cell-autonomous Nfkb2 signaling supplemented latent NF-κB dimers, leading to a hyperactive canonical RelA response in the inflamed colon. In sum, the regulation of latent NF-κB dimers appears to link noncanonical Nfkb2 signaling to RelA-driven inflammatory pathologies and may provide for therapeutic targets.
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Affiliation(s)
- Meenakshi Chawla
- Systems Immunology Laboratory, National Institute of Immunology, New Delhi 110067, India
| | - Tapas Mukherjee
- Systems Immunology Laboratory, National Institute of Immunology, New Delhi 110067, India
| | - Alvina Deka
- Systems Immunology Laboratory, National Institute of Immunology, New Delhi 110067, India
| | - Budhaditya Chatterjee
- Systems Immunology Laboratory, National Institute of Immunology, New Delhi 110067, India
- Kusuma School of Biological Sciences, Indian Institute of Technology Delhi, New Delhi 110016, India
| | - Uday Aditya Sarkar
- Systems Immunology Laboratory, National Institute of Immunology, New Delhi 110067, India
| | - Amit K Singh
- Department of Gastroenterology, All India Institute of Medical Science, New Delhi 110029, India
| | - Saurabh Kedia
- Department of Gastroenterology, All India Institute of Medical Science, New Delhi 110029, India
| | - Josephine Lum
- Singapore Immunology Network, Agency for Science, Technology and Research (A*STAR), Singapore 138632
| | - Manprit Kaur Dhillon
- Singapore Immunology Network, Agency for Science, Technology and Research (A*STAR), Singapore 138632
| | - Balaji Banoth
- Systems Immunology Laboratory, National Institute of Immunology, New Delhi 110067, India
| | - Subhra K Biswas
- Singapore Immunology Network, Agency for Science, Technology and Research (A*STAR), Singapore 138632
| | - Vineet Ahuja
- Department of Gastroenterology, All India Institute of Medical Science, New Delhi 110029, India
| | - Soumen Basak
- Systems Immunology Laboratory, National Institute of Immunology, New Delhi 110067, India;
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18
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Shi J, Song S, Li S, Zhang K, Lan Y, Li Y. TNF-α/NF-κB signaling epigenetically represses PSD4 transcription to promote alcohol-related hepatocellular carcinoma progression. Cancer Med 2021; 10:3346-3357. [PMID: 33932127 PMCID: PMC8124102 DOI: 10.1002/cam4.3832] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2020] [Revised: 12/08/2020] [Accepted: 12/11/2020] [Indexed: 11/12/2022] Open
Abstract
BACKGROUND Chronic alcohol consumption is more frequently associated with advanced, aggressive hepatocellular carcinoma (HCC) tumors. Alcohol adversely impacts ER/Golgi membrane trafficking and Golgi protein N-glycosylation in hepatocytes; these effects have been attributed (in part) to dysregulated adenosine diphosphate-ribosylation factor (ARF) GTPase signaling. Here, we investigated the role of the ARF GTPase guanine exchange factor PSD4 in HCC progression. METHODS R-based bioinformatics analysis was performed on publicly available array data. Modulating gene expression was accomplished via lentiviral vectors. Gene expression was analyzed using quantitative real-time PCR and immunoblotting. PSD4 promoter methylation was assessed using quantitative methylation-specific PCR. Phospho-p65(S276)/DNMT1 binding to the PSD4 promoter was analyzed via chromatin immunoprecipitation. We constructed ethanol/DEN-induced and DEN only-induced transgenic murine models of HCC. RESULTS We identified PSD4 as a hypermethylated, suppressed gene in alcohol-related HCC tumors; however, PSD4 was not dysregulated in all-cause HCC tumors. Certain HCC cell lines also displayed varying degrees of PSD4 downregulation. PSD4 overexpression or knockdown decreased and increased cell migration and invasiveness, respectively. Mechanistically, PSD4 transcription was repressed by TNF-α-induced phospho-p65(S276)'s recruitment of DNA methyltransferase 1 (DNMT1), resulting in PSD4 promoter methylation. PSD4 inhibited pro-EMT CDC42 activity, resulting in downregulation of E-cadherin and upregulation of N-cadherin and vimentin. Hepatocyte-specific PSD4 overexpression reduced ethanol/DEN-induced HCC tumor progression and EMT marker expression in vivo. CONCLUSIONS PSD4 is a hypermethylated, suppressed gene in alcohol-related HCC tumors that negatively modulated pro-EMT CDC42 activity. Furthermore, we present a novel phospho-NF-κB p65(S276)/DNMT1-mediated promoter methylation mechanism by which TNF-α/NF-κB signaling represses PSD4 transcription in HCC cells.
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Affiliation(s)
- Jia'ning Shi
- Department of Infectious Disease, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang, China
| | - Shupeng Song
- Department of Infectious Disease, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang, China
| | - Shuangxing Li
- Department of Infectious Disease, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang, China
| | - Kaili Zhang
- Department of Infectious Disease, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang, China
| | - Yinghua Lan
- Department of Infectious Disease, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang, China
| | - Yongguo Li
- Department of Infectious Disease, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang, China
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19
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Zinatizadeh MR, Schock B, Chalbatani GM, Zarandi PK, Jalali SA, Miri SR. The Nuclear Factor Kappa B (NF-kB) signaling in cancer development and immune diseases. Genes Dis 2021; 8:287-297. [PMID: 33997176 PMCID: PMC8093649 DOI: 10.1016/j.gendis.2020.06.005] [Citation(s) in RCA: 194] [Impact Index Per Article: 64.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2019] [Revised: 05/26/2020] [Accepted: 06/12/2020] [Indexed: 02/07/2023] Open
Abstract
The nuclear factor kappa B (NF-kB) family of transcription factors plays an essential role as stressors in the cellular environment, and controls the expression of important regulatory genes such as immunity, inflammation, death, and cell proliferation. NF-kB protein is located in the cytoplasm, and can be activated by various cellular stimuli. There are two pathways for NF-kB activation, as the canonical and non-canonical pathways, which require complex molecular interactions with adapter proteins and phosphorylation and ubiquitinase enzymes. Accordingly, this increases NF-kB translocation in the nucleus and regulates gene expression. In this study, the concepts that emerge in different cellular systems allow the design of NF-kB function in humans. This would not only allow the development for rare diseases associated with NF-kB, but would also be used as a source of useful information to eliminate widespread consequences such as cancer or inflammatory/immune diseases.
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Affiliation(s)
| | - Bettina Schock
- Centre for Experimental Medicine, Queen's University Belfast, Belfast, BT7 1NN, United Kingdom
| | - Ghanbar Mahmoodi Chalbatani
- Department of Medical Immunology, School of Medicine, Tehran University of Medical Sciences, Tehran, 1336616357, Iran
- Cancer Research Center, Cancer Institute of Iran, Tehran University of Medical Science, Tehran, 1336616357, Iran
| | | | - Seyed Amir Jalali
- Department of Medical Immunology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, 1336616357, Iran
| | - Seyed Rouhollah Miri
- Cancer Research Center, Cancer Institute of Iran, Tehran University of Medical Science, Tehran, 1336616357, Iran
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20
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A Kinase Assay for Measuring the Activity of the NIK-IKK1 Complex Induced via the Noncanonical NF-κB Pathway. Methods Mol Biol 2021; 2366:165-181. [PMID: 34236638 DOI: 10.1007/978-1-0716-1669-7_10] [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] [Indexed: 02/07/2023]
Abstract
Nuclear factor-kappa B (NF-κB) inducing kinase (NIK), a key component of the noncanonical NF-κB pathway, directs a range of physiological processes, such as lymphoid organogenesis, immune cell differentiation, and immune responses. Aberrant noncanonical NF-κΒ signaling also causes human ailments, including autoimmune and neoplastic diseases. As such, NIK is constitutively degraded in resting cells, and accumulates upon noncanonical NF-κB signaling. NIK then associates with and phosphorylates IkappaB kinase 1 (IKK1, alternately IKKα). Subsequently, the NIK-IKK1 complex mediates the phosphorylation of p100 that triggers partial proteolysis of p100 into p52. Typically, accumulation of NIK or processing of p100 is estimated by immunoblot analyses, and these indirect measurements are used as a surrogate for cellular NIK activity. However, studies involving knockout and cancerous cells indicated that the activity of NIK-IKK1 might not always correlate with the abundance of NIK or with the relative level of p52 and p100. In this report, we describe a specific and sensitive assay for direct evaluation of cellular NIK-IKK1 activity. Here, NIK immunoprecipitates are examined for the presence of IKK1-dependent kinase activity toward p100. The NIK-IKK1 assay captured selectively noncanonical NF-κB activation in the context of multiple cell activating stimuli and cell types, including patient-derived myeloma cells. We suggest that our assay may help advance our understanding of the role of NIK in health and diseases.
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21
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RNA-Seq Transcriptome Analysis Reveals Long Terminal Repeat Retrotransposon Modulation in Human Peripheral Blood Mononuclear Cells after In Vivo Lipopolysaccharide Injection. J Virol 2020; 94:JVI.00587-20. [PMID: 32669333 DOI: 10.1128/jvi.00587-20] [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: 04/01/2020] [Accepted: 07/07/2020] [Indexed: 12/30/2022] Open
Abstract
Human endogenous retroviruses (HERVs) and mammalian apparent long terminal repeat (LTR) retrotransposons (MaLRs) are retroviral sequences that integrated into germ line cells millions of years ago. Transcripts of these LTR retrotransposons are present in several tissues, and their expression is modulated in pathological conditions, although their function remains often far from being understood. Here, we focused on the HERV/MaLR expression and modulation in a scenario of immune system activation. We used a public data set of human peripheral blood mononuclear cells (PBMCs) RNA-Seq from 15 healthy participants to a clinical trial before and after exposure to lipopolysaccharide (LPS), for which we established an RNA-Seq workflow for the identification of expressed and modulated cellular genes and LTR retrotransposon elements.IMPORTANCE We described the HERV and MaLR transcriptome in PBMCs, finding that about 8.4% of the LTR retrotransposon loci were expressed and identifying the betaretrovirus-like HERVs as those with the highest percentage of expressed loci. We found 4,607 HERV and MaLR loci that were modulated as a result of in vivo stimulation with LPS. The HERV-H group showed the highest number of differentially expressed most intact proviruses. We characterized the HERV and MaLR loci as differentially expressed, checking their genomic context of insertion and observing a general colocalization with genes that are involved and modulated in the immune response, as a consequence of LPS stimulation. The analyses of HERV and MaLR expression and modulation show that these LTR retrotransposons are expressed in PBMCs and regulated in inflammatory settings. The similar regulation of HERVs/MaLRs and genes after LPS stimulation suggests possible interactions of LTR retrotransposons and the immune host response.
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22
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Walter CEJ, Durairajan S, Periyandavan K, C GPD, G DJD, A HRV, Johnson T, Zayed H. Bladder neoplasms and NF-κB: an unfathomed association. Expert Rev Mol Diagn 2020; 20:497-508. [PMID: 32228251 DOI: 10.1080/14737159.2020.1743688] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Introduction: Bladder cancer is the second most common genitourinary tract cancer and is often recurrent and/or chemoresistant after tumor resection. Cigarette smoking, exposure to aromatic amines, and chronic infection/inflammation are bladder cancer risk factors. NF-κB is a transcription factor that plays a critical role in normal physiology and bladder cancer. Bladder cancer patients have constitutively active NF-κB triggered by pro-inflammatory cytokines, chemokines, and hypoxia, augmenting carcinogenesis and progression.Areas covered: NF-κB orchestrates protein interactions (PTEN, survivin, VEGF), regulation (CYLD, USP13) and gene expression (Trp 53) resulting in bladder cancer progression, recurrence and resistance to therapy. This review focuses on NF-κB in bladder inflammation, cancer and resistance to therapy.Expert opinion: NF-κB and bladder cancer necessitate further research to develop better diagnostic and treatment regimens that address progression, recurrence and resistance to therapy. NF-κB is a master regulator that can act with or on minimally one cancer hallmark gene or protein, leading to bladder cancer progression (Tp53, PTEN, VEGF, HMGB1, CYLD, USP13), recurrence (PCNA, BcL-2, JUN) and resistance to therapy (P-gp, twist, SETD6). Thus, an understanding of bladder cancer in relation to NF-κB will offer improved strategies and efficacious targeted therapies resulting in minimal progression, recurrence and resistance to therapy.
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Affiliation(s)
- Charles Emmanuel Jebaraj Walter
- Department of Biotechnology, Faculty of Biomedical Sciences, Technology and Research, Sri Ramachandra Institute of Higher Education and Research (Deemed to be University), Chennai, India
| | - Sankari Durairajan
- Department of Biotechnology, Faculty of Biomedical Sciences, Technology and Research, Sri Ramachandra Institute of Higher Education and Research (Deemed to be University), Chennai, India
| | - Kalaiselvi Periyandavan
- Department of Medical Biochemistry, Dr. ALM PG Institute of Basic Medical Science, University of Madras, Chennai, India
| | - George Priya Doss C
- Department of Integrative Biology, School of Biosciences and Technology, VIT University, Vellore, India
| | - Dicky John Davis G
- Department of Biotechnology, Faculty of Biomedical Sciences, Technology and Research, Sri Ramachandra Institute of Higher Education and Research (Deemed to be University), Chennai, India
| | - Hannah Rachel Vasanthi A
- Department of Biotechnology, School of Life Sciences, Pondicherry University, Pondicherry, India
| | - Thanka Johnson
- Department of Biotechnology, Faculty of Biomedical Sciences, Technology and Research, Sri Ramachandra Institute of Higher Education and Research (Deemed to be University), Chennai, India
| | - Hatem Zayed
- Department of Biomedical Sciences, College of Health Sciences, Qatar University, Doha, Qatar
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23
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Dhar A, Chawla M, Chattopadhyay S, Oswal N, Umar D, Gupta S, Bal V, Rath S, George A, Arimbasseri GA, Basak S. Role of NF-kappaB2-p100 in regulatory T cell homeostasis and activation. Sci Rep 2019; 9:13867. [PMID: 31554891 PMCID: PMC6761191 DOI: 10.1038/s41598-019-50454-z] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2019] [Accepted: 09/10/2019] [Indexed: 12/12/2022] Open
Abstract
The immunological roles of the nuclear factor-kappaB (NF-κB) pathway are mediated via the canonical components in immune responses and via non-canonical components in immune organogenesis and homeostasis, although the two components are capable of crosstalk. Regulatory CD4 T cells (Tregs) are homeostatically functional and represent an interesting potential meeting point of these two NF-κB components. We show that mice deficient in the non-canonical NF-κB component gene Nfkb2 (p100) had normal thymic development and suppressive function of Tregs. However, they had enhanced frequencies of peripheral 'effector-phenotype' Tregs (eTregs). In bi-parental chimeras of wild-type (WT) and Nfkb2-/- mice, the Nfkb2-/- genotype was over-represented in Tregs, with a further increase in the relative prominence of eTregs. Consistent with distinct properties of eTregs, the Nfkb2-/- genotype was more prominent in Tregs in extra-lymphoid tissues such as liver in the bi-parental chimeras. The Nfkb2-/- Tregs also displayed greater survival, activation and proliferation in vivo. These Nfkb2-/- Tregs showed higher nuclear NF-κB activity mainly comprising of RelB-containing dimers, in contrast to the prominence of cRel- and RelA-containing dimers in WT Tregs. Since p100 is an inhibitor of RelB activation as well as a participant as cleaved p52 in RelB nuclear activity, we tested bi-parental chimeras of WT and Relb-/- mice, and found normal frequencies of Relb-/- Tregs and eTregs in these chimeric mice. Our findings confirm and extend recent data, and indicate that p100 normally restrains RelB-mediated Treg activation, and in the absence of p100, p50-RelB dimers can contribute to Treg activation.
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Affiliation(s)
- Atika Dhar
- National Institute of Immunology, New Delhi, India
| | | | | | - Neelam Oswal
- National Institute of Immunology, New Delhi, India
| | - Danish Umar
- National Institute of Immunology, New Delhi, India
| | - Suman Gupta
- National Institute of Immunology, New Delhi, India
| | - Vineeta Bal
- National Institute of Immunology, New Delhi, India
| | | | - Anna George
- National Institute of Immunology, New Delhi, India
| | | | - Soumen Basak
- National Institute of Immunology, New Delhi, India
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24
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Adelaja A, Hoffmann A. Signaling Crosstalk Mechanisms That May Fine-Tune Pathogen-Responsive NFκB. Front Immunol 2019; 10:433. [PMID: 31312197 PMCID: PMC6614373 DOI: 10.3389/fimmu.2019.00433] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2018] [Accepted: 02/19/2019] [Indexed: 01/14/2023] Open
Abstract
Precise control of inflammatory gene expression is critical for effective host defense without excessive tissue damage. The principal regulator of inflammatory gene expression is nuclear factor kappa B (NFκB), a transcription factor. Nuclear NFκB activity is controlled by IκB proteins, whose stimulus-responsive degradation and re-synthesis provide for transient or dynamic regulation. The IκB-NFκB signaling module receives input signals from a variety of pathogen sensors, such as toll-like receptors (TLRs). The molecular components and mechanisms of NFκB signaling are well-understood and have been reviewed elsewhere in detail. Here we review the molecular mechanisms that mediate cross-regulation of TLR-IκB-NFκB signal transduction by signaling pathways that do not activate NFκB themselves, such as interferon signaling pathways. We distinguish between potential regulatory crosstalk mechanisms that (i) occur proximal to TLRs and thus may have stimulus-specific effects, (ii) affect the core IκB-NFκB signaling module to modulate NFκB activation in response to several stimuli. We review some well-documented examples of molecular crosstalk mechanisms and indicate other potential mechanisms whose physiological roles require further study.
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Affiliation(s)
- Adewunmi Adelaja
- UCLA-Caltech Medical Scientist Training Program, Department of Microbiology, Immunology, and Molecular Genetics, David Geffen School of Medicine, Molecular Biology Institute, University of California, Los Angeles, Los Angeles, CA, United States
- Department of Microbiology, Immunology, and Molecular Genetics, Institute for Quantitative and Computational Biosciences, University of California, Los Angeles, Los Angeles, CA, United States
| | - Alexander Hoffmann
- Department of Microbiology, Immunology, and Molecular Genetics, Institute for Quantitative and Computational Biosciences, University of California, Los Angeles, Los Angeles, CA, United States
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25
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Chatterjee B, Roy P, Sarkar UA, Zhao M, Ratra Y, Singh A, Chawla M, De S, Gomes J, Sen R, Basak S. Immune Differentiation Regulator p100 Tunes NF-κB Responses to TNF. Front Immunol 2019; 10:997. [PMID: 31134075 PMCID: PMC6514058 DOI: 10.3389/fimmu.2019.00997] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2019] [Accepted: 04/18/2019] [Indexed: 11/14/2022] Open
Abstract
Tumor necrosis factor (TNF) is a pleiotropic cytokine whose primary physiological function involves coordinating inflammatory and adaptive immune responses. However, uncontrolled TNF signaling causes aberrant inflammation and has been implicated in several human ailments. Therefore, an understanding of the molecular mechanisms underlying dynamical and gene controls of TNF signaling bear significance for human health. As such, TNF engages the canonical nuclear factor kappa B (NF-κB) pathway to activate RelA:p50 heterodimers, which induce expression of specific immune response genes. Brief and chronic TNF stimulation produces transient and long-lasting NF-κB activities, respectively. Negative feedback regulators of the canonical pathway, including IκBα, are thought to ensure transient RelA:p50 responses to short-lived TNF signals. The non-canonical NF-κB pathway mediates RelB activity during immune differentiation involving p100. We uncovered an unexpected role of p100 in TNF signaling. Brief TNF stimulation of p100-deficient cells triggered an additional late NF-κB activity consisting of RelB:p50 heterodimers, which modified the TNF-induced gene-expression program. In p100-deficient cells subjected to brief TNF stimulation, RelB:p50 not only sustained the expression of a subset of RelA-target immune response genes but also activated additional genes that were not normally induced by TNF in WT mouse embryonic fibroblasts (MEFs) and were related to immune differentiation and metabolic processes. Despite this RelB-mediated distinct gene control, however, RelA and RelB bound to mostly overlapping chromatin sites in p100-deficient cells. Repeated TNF pulses strengthened this RelB:p50 activity, which was supported by NF-κB-driven RelB synthesis. Finally, brief TNF stimulation elicited late-acting expressions of NF-κB target pro-survival genes in p100-deficient myeloma cells. In sum, our study suggests that the immune-differentiation regulator p100 enforces specificity of TNF signaling and that varied p100 levels may provide for modifying TNF responses in diverse physiological and pathological settings.
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Affiliation(s)
- Budhaditya Chatterjee
- Systems Immunology Laboratory, National Institute of Immunology, New Delhi, India.,Kusuma School of Biological Sciences, Indian Institute of Technology Delhi, New Delhi, India
| | - Payel Roy
- Systems Immunology Laboratory, National Institute of Immunology, New Delhi, India
| | - Uday Aditya Sarkar
- Systems Immunology Laboratory, National Institute of Immunology, New Delhi, India
| | - Mingming Zhao
- Gene Regulation Section, Laboratory of Molecular Biology and Immunology, National Institute on Aging, Baltimore, MD, United States
| | - Yashika Ratra
- Systems Immunology Laboratory, National Institute of Immunology, New Delhi, India
| | - Amit Singh
- Gene Regulation Section, Laboratory of Molecular Biology and Immunology, National Institute on Aging, Baltimore, MD, United States
| | - Meenakshi Chawla
- Systems Immunology Laboratory, National Institute of Immunology, New Delhi, India
| | - Supriyo De
- Laboratory of Genetics and Genomics, National Institute on Aging, Baltimore, MD, United States
| | - James Gomes
- Kusuma School of Biological Sciences, Indian Institute of Technology Delhi, New Delhi, India
| | - Ranjan Sen
- Gene Regulation Section, Laboratory of Molecular Biology and Immunology, National Institute on Aging, Baltimore, MD, United States
| | - Soumen Basak
- Systems Immunology Laboratory, National Institute of Immunology, New Delhi, India
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26
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Substrate complex competition is a regulatory motif that allows NFκB RelA to license but not amplify NFκB RelB. Proc Natl Acad Sci U S A 2019; 116:10592-10597. [PMID: 31048505 DOI: 10.1073/pnas.1816000116] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
Signaling pathways often share molecular components, tying the activity of one pathway to the functioning of another. In the NFκB signaling system, distinct kinases mediate inflammatory and developmental signaling via RelA and RelB, respectively. Although the substrates of the developmental, so-called noncanonical, pathway are induced by inflammatory/canonical signaling, crosstalk is limited. Through dynamical systems modeling, we identified the underlying regulatory mechanism. We found that as the substrate of the noncanonical kinase NIK, the nfkb2 gene product p100, transitions from a monomer to a multimeric complex, it may compete with and inhibit p100 processing to the active p52. Although multimeric complexes of p100 (IκBδ) are known to inhibit preexisting RelA:p50 through sequestration, here we report that p100 complexes can inhibit the enzymatic formation of RelB:p52. We show that the dose-response systems properties of this complex substrate competition motif are poorly accounted for by standard Michaelis-Menten kinetics, but require more detailed mass action formulations. In sum, although tonic inflammatory signaling is required for adequate expression of the noncanonical pathway precursors, the substrate complex competition motif identified here can prevent amplification of the active RelB:p52 dimer in elevated inflammatory conditions to ensure reliable RelB-dependent developmental signaling independent of inflammatory context.
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27
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Kotlinowski J, Bukowska-Strakova K, Koppolu A, Kosińska J, Pydyn N, Stawinski P, Wilamowski M, Nowak W, Józkowicz A, Baran J, Płoski R, Jura J. A Novel Monoallelic Nonsense Mutation in the NFKB2 Gene Does Not Cause a Clinical Manifestation. Front Genet 2019; 10:140. [PMID: 30863427 PMCID: PMC6399389 DOI: 10.3389/fgene.2019.00140] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2018] [Accepted: 02/11/2019] [Indexed: 01/06/2023] Open
Abstract
NF-κB signaling, acting through NFKB1 dependent canonical and NFKB2 dependent non-canonical pathways plays a critical role in inflammatory and immune responses. Recent studies have associated mutations in these two genes with a common variable immunodeficiency (CVID). While evaluating a female patient seeking a diagnosis explaining her recurrent infections, we found a novel heterozygous c.1831C > T (p.Arg611∗) nonsense mutation in the NFKB2 gene which introduces a Stop codon in the ankyrin repeat domain of p100. Whole exome sequencing (WES) analysis, followed by Sanger sequencing, identified this previously unknown mutation in two other family members. Penetrance of the c.1831C > T variant was assessed by flow-cytometry and protein expression in peripheral blood mononuclear cells (PBMC); whereas, activation of the NF-κB2 signaling pathway was examined through immunoblotting and real-time PCR. Heterozygous c.1831C > T variant led to the expansion of lymphocyte B subpopulations with concomitant reduction of plasmablasts, low IgG levels, and accumulation of p52 in PBMC. On the other hand, tested subjects had normal levels of IgM, IgA, IgE and no impairment in lymphocytes proliferation. Although evaluated patients did not fulfill all clinical features of CVID, their health should be monitored in the future for possible late manifestation of the disease. In conclusion, we showed that NFKB2 haplodeficiency caused by c.1831C > T nonsense mutation is asymptomatic, possibly due to the compensatory mechanisms and allele redundancy.
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Affiliation(s)
- Jerzy Kotlinowski
- Department of General Biochemistry, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Kraków, Poland
| | - Karolina Bukowska-Strakova
- Department of Clinical Immunology, Institute of Pediatrics, Jagiellonian University Medical College, Kraków, Poland
| | - Agnieszka Koppolu
- Department of Medical Genetics, Medical University of Warsaw, Warsaw, Poland.,Postgraduate School of Molecular Medicine, Medical University of Warsaw, Warsaw, Poland
| | - Joanna Kosińska
- Department of Medical Genetics, Medical University of Warsaw, Warsaw, Poland
| | - Natalia Pydyn
- Department of General Biochemistry, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Kraków, Poland
| | - Piotr Stawinski
- Department of Medical Genetics, Medical University of Warsaw, Warsaw, Poland
| | - Mateusz Wilamowski
- Department of General Biochemistry, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Kraków, Poland
| | - Witold Nowak
- Department of Medical Biotechnology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Kraków, Poland
| | - Alicja Józkowicz
- Department of Medical Biotechnology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Kraków, Poland
| | - Jarosław Baran
- Department of Clinical Immunology, Institute of Pediatrics, Jagiellonian University Medical College, Kraków, Poland
| | - Rafał Płoski
- Department of Medical Genetics, Medical University of Warsaw, Warsaw, Poland
| | - Jolanta Jura
- Department of General Biochemistry, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Kraków, Poland
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28
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Mulero MC, Huxford T, Ghosh G. NF-κB, IκB, and IKK: Integral Components of Immune System Signaling. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2019; 1172:207-226. [PMID: 31628658 DOI: 10.1007/978-981-13-9367-9_10] [Citation(s) in RCA: 133] [Impact Index Per Article: 26.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The NF-κB (Nuclear Factor kappa B) transcription factor plays crucial roles in the regulation of numerous biological processes including development of the immune system, inflammation, and innate and adaptive immune responses. Control over the immune cell functions of NF-κB results from signaling through one of two different routes: the canonical and noncanonical NF-κB signaling pathways. Present at the end of both pathways are the proteins NF-κB, IκB, and the IκB kinase (IKK). These proteins work together to deliver the myriad outcomes that influence context-dependent transcriptional control in immune cells. In the present chapter, we review the structural information available on NF-κB, IκB, and IKK, the critical terminal components of the NF-κB signaling, in relation to their physiological function.
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Affiliation(s)
- Maria Carmen Mulero
- Department of Chemistry & Biochemistry, University of California San Diego, 9500 Gilman Drive, La Jolla, CA, 92093, USA
| | - Tom Huxford
- Structural Biochemistry Laboratory, Department of Chemistry & Biochemistry, San Diego State University, 5500 Campanile Drive, San Diego, CA, 92182, USA
| | - Gourisankar Ghosh
- Department of Chemistry & Biochemistry, University of California San Diego, 9500 Gilman Drive, La Jolla, CA, 92093, USA.
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29
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Tuijnenburg P, Lango Allen H, Burns SO, Greene D, Jansen MH, Staples E, Stephens J, Carss KJ, Biasci D, Baxendale H, Thomas M, Chandra A, Kiani-Alikhan S, Longhurst HJ, Seneviratne SL, Oksenhendler E, Simeoni I, de Bree GJ, Tool ATJ, van Leeuwen EMM, Ebberink EHTM, Meijer AB, Tuna S, Whitehorn D, Brown M, Turro E, Thrasher AJ, Smith KGC, Thaventhiran JE, Kuijpers TW. Loss-of-function nuclear factor κB subunit 1 (NFKB1) variants are the most common monogenic cause of common variable immunodeficiency in Europeans. J Allergy Clin Immunol 2018; 142:1285-1296. [PMID: 29477724 PMCID: PMC6148345 DOI: 10.1016/j.jaci.2018.01.039] [Citation(s) in RCA: 140] [Impact Index Per Article: 23.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2017] [Revised: 12/15/2017] [Accepted: 01/03/2018] [Indexed: 12/26/2022]
Abstract
BACKGROUND The genetic cause of primary immunodeficiency disease (PID) carries prognostic information. OBJECTIVE We conducted a whole-genome sequencing study assessing a large proportion of the NIHR BioResource-Rare Diseases cohort. METHODS In the predominantly European study population of principally sporadic unrelated PID cases (n = 846), a novel Bayesian method identified nuclear factor κB subunit 1 (NFKB1) as one of the genes most strongly associated with PID, and the association was explained by 16 novel heterozygous truncating, missense, and gene deletion variants. This accounted for 4% of common variable immunodeficiency (CVID) cases (n = 390) in the cohort. Amino acid substitutions predicted to be pathogenic were assessed by means of analysis of structural protein data. Immunophenotyping, immunoblotting, and ex vivo stimulation of lymphocytes determined the functional effects of these variants. Detailed clinical and pedigree information was collected for genotype-phenotype cosegregation analyses. RESULTS Both sporadic and familial cases demonstrated evidence of the noninfective complications of CVID, including massive lymphadenopathy (24%), unexplained splenomegaly (48%), and autoimmune disease (48%), features prior studies correlated with worse clinical prognosis. Although partial penetrance of clinical symptoms was noted in certain pedigrees, all carriers have a deficiency in B-lymphocyte differentiation. Detailed assessment of B-lymphocyte numbers, phenotype, and function identifies the presence of an increased CD21low B-cell population. Combined with identification of the disease-causing variant, this distinguishes between healthy subjects, asymptomatic carriers, and clinically affected cases. CONCLUSION We show that heterozygous loss-of-function variants in NFKB1 are the most common known monogenic cause of CVID, which results in a temporally progressive defect in the formation of immunoglobulin-producing B cells.
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Affiliation(s)
- Paul Tuijnenburg
- Department of Pediatric Hematology, Immunology and Infectious Diseases, Emma Children's Hospital, Academic Medical Center, Amsterdam, The Netherlands; Department of Experimental Immunology, Academic Medical Center, Amsterdam, The Netherlands
| | - Hana Lango Allen
- Department of Haematology, University of Cambridge, Cambridge, United Kingdom; NHS Blood and Transplant Cambridge, Cambridge Biomedical Campus, Cambridge, United Kingdom
| | - Siobhan O Burns
- Department of Immunology, Royal Free London NHS Foundation Trust, University College London Institute of Immunity and Transplantation, London, United Kingdom
| | - Daniel Greene
- Department of Haematology, University of Cambridge, Cambridge, United Kingdom; NHS Blood and Transplant Cambridge, Cambridge Biomedical Campus, Cambridge, United Kingdom
| | - Machiel H Jansen
- Department of Pediatric Hematology, Immunology and Infectious Diseases, Emma Children's Hospital, Academic Medical Center, Amsterdam, The Netherlands; Department of Experimental Immunology, Academic Medical Center, Amsterdam, The Netherlands
| | - Emily Staples
- Department of Medicine, University of Cambridge, Cambridge, United Kingdom
| | - Jonathan Stephens
- Department of Haematology, University of Cambridge, Cambridge, United Kingdom; NHS Blood and Transplant Cambridge, Cambridge Biomedical Campus, Cambridge, United Kingdom
| | - Keren J Carss
- Department of Haematology, University of Cambridge, Cambridge, United Kingdom; NHS Blood and Transplant Cambridge, Cambridge Biomedical Campus, Cambridge, United Kingdom
| | - Daniele Biasci
- Department of Medicine, University of Cambridge, Cambridge, United Kingdom
| | - Helen Baxendale
- Department of Medicine, University of Cambridge, Cambridge, United Kingdom
| | - Moira Thomas
- Department of Immunology, Queen Elizabeth University Hospital, Glasgow, United Kingdom
| | - Anita Chandra
- Department of Medicine, University of Cambridge, Cambridge, United Kingdom
| | - Sorena Kiani-Alikhan
- Department of Immunology, Royal Surrey County Hospital, Guildford, United Kingdom
| | - Hilary J Longhurst
- Department of Immunology, Barts Health NHS Trust, London, United Kingdom
| | - Suranjith L Seneviratne
- Department of Immunology, Royal Free London NHS Foundation Trust, University College London Institute of Immunity and Transplantation, London, United Kingdom
| | - Eric Oksenhendler
- Department of Clinical Immunology, Hôpital Saint-Louis, Assistance Publique Hôpitaux de Paris (APHP), Paris, France
| | - Ilenia Simeoni
- Department of Haematology, University of Cambridge, Cambridge, United Kingdom
| | - Godelieve J de Bree
- Department of Internal Medicine, Academic Medical Center, Amsterdam, The Netherlands
| | - Anton T J Tool
- Department of Blood Cell Research, Sanquin Research, Amsterdam, The Netherlands
| | - Ester M M van Leeuwen
- Department of Experimental Immunology, Academic Medical Center, Amsterdam, The Netherlands
| | | | - Alexander B Meijer
- Department of Plasma Proteins, Sanquin Research, Amsterdam, The Netherlands
| | - Salih Tuna
- Department of Haematology, University of Cambridge, Cambridge, United Kingdom; NHS Blood and Transplant Cambridge, Cambridge Biomedical Campus, Cambridge, United Kingdom
| | - Deborah Whitehorn
- Department of Haematology, University of Cambridge, Cambridge, United Kingdom; NHS Blood and Transplant Cambridge, Cambridge Biomedical Campus, Cambridge, United Kingdom
| | - Matthew Brown
- Department of Haematology, University of Cambridge, Cambridge, United Kingdom; NHS Blood and Transplant Cambridge, Cambridge Biomedical Campus, Cambridge, United Kingdom
| | - Ernest Turro
- Department of Haematology, University of Cambridge, Cambridge, United Kingdom; NHS Blood and Transplant Cambridge, Cambridge Biomedical Campus, Cambridge, United Kingdom
| | - Adrian J Thrasher
- Molecular and Cellular Immunology Section, UCL Great Ormond Street Institute of Child Health and Great Ormond Street Hospital NHS Trust London, London, United Kingdom
| | - Kenneth G C Smith
- Department of Medicine, University of Cambridge, Cambridge, United Kingdom
| | | | - Taco W Kuijpers
- Department of Pediatric Hematology, Immunology and Infectious Diseases, Emma Children's Hospital, Academic Medical Center, Amsterdam, The Netherlands; Department of Experimental Immunology, Academic Medical Center, Amsterdam, The Netherlands; Department of Internal Medicine, Academic Medical Center, Amsterdam, The Netherlands.
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30
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D'Ignazio L, Batie M, Rocha S. TNFSF14/LIGHT, a Non-Canonical NF-κB Stimulus, Induces the HIF Pathway. Cells 2018; 7:E102. [PMID: 30096845 PMCID: PMC6116154 DOI: 10.3390/cells7080102] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2018] [Revised: 08/06/2018] [Accepted: 08/07/2018] [Indexed: 12/20/2022] Open
Abstract
Non-canonical NF-κB signalling plays important roles in the development and function of the immune system but it also is deregulated in a number of inflammatory diseases. Although, NF-κB and HIF crosstalk has been documented, this has only been described following canonical NF-κB stimulation, involving RelA/p50 and the HIF-1 dimer. Here, we report that the non-canonical inducer TNFSF14/LIGHT leads to HIF induction and activation in cancer cells. We demonstrate that only HIF-2α is induced at the transcriptional level following non-canonical NF-κB activation, via a mechanism that is dependent on the p52 subunit. Furthermore, we demonstrate that p52 can bind to the HIF-2α promoter in cells. These results indicate that non-canonical NF-κB can lead to HIF signalling implicating HIF-2α as one of the downstream effectors of this pathway in cells.
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Affiliation(s)
- Laura D'Ignazio
- Center for Gene Regulation and Expression, School of Life Sciences, University of Dundee, Dundee DD15EH, UK.
| | - Michael Batie
- Department of Biochemistry, Institute of Integrative Biology, University of Liverpool, Liverpool L697ZB, UK.
| | - Sonia Rocha
- Center for Gene Regulation and Expression, School of Life Sciences, University of Dundee, Dundee DD15EH, UK.
- Department of Biochemistry, Institute of Integrative Biology, University of Liverpool, Liverpool L697ZB, UK.
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31
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Noncanonical NF-κB in Cancer. Biomedicines 2018; 6:biomedicines6020066. [PMID: 29874793 PMCID: PMC6027307 DOI: 10.3390/biomedicines6020066] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2018] [Revised: 05/31/2018] [Accepted: 06/04/2018] [Indexed: 12/31/2022] Open
Abstract
The NF-κB pathway is a critical regulator of immune responses and is often dysregulated in cancer. Two NF-κB pathways have been described to mediate these responses, the canonical and the noncanonical. While understudied compared to the canonical NF-κB pathway, noncanonical NF-κB and its components have been shown to have effects, usually protumorigenic, in many different cancer types. Here, we review noncanonical NF-κB pathways and discuss its important roles in promoting cancer. We also discuss alternative NF-κB-independent functions of some the components of noncanonical NF-κB signaling. Finally, we discuss important crosstalk between canonical and noncanonical signaling, which blurs the two pathways, indicating that understanding the full picture of NF-κB regulation is critical to deciphering how this broad pathway promotes oncogenesis.
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32
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Roy P, Sarkar UA, Basak S. The NF-κB Activating Pathways in Multiple Myeloma. Biomedicines 2018; 6:biomedicines6020059. [PMID: 29772694 PMCID: PMC6027071 DOI: 10.3390/biomedicines6020059] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2018] [Revised: 05/14/2018] [Accepted: 05/14/2018] [Indexed: 12/29/2022] Open
Abstract
Multiple myeloma(MM), an incurable plasma cell cancer, represents the second most prevalent hematological malignancy. Deregulated activity of the nuclear factor kappaB (NF-κB) family of transcription factors has been implicated in the pathogenesis of multiple myeloma. Tumor microenvironment-derived cytokines and cancer-associated genetic mutations signal through the canonical as well as the non-canonical arms to activate the NF-κB system in myeloma cells. In fact, frequent engagement of both the NF-κB pathways constitutes a distinguishing characteristic of myeloma. In turn, NF-κB signaling promotes proliferation, survival and drug-resistance of myeloma cells. In this review article, we catalog NF-κB activating genetic mutations and microenvironmental cues associated with multiple myeloma. We then describe how the individual canonical and non-canonical pathways transduce signals and contribute towards NF-κB -driven gene-expressions in healthy and malignant cells. Furthermore, we discuss signaling crosstalk between concomitantly triggered NF-κB pathways, and its plausible implication for anomalous NF-κB activation and NF-κB driven pro-survival gene-expressions in multiple myeloma. Finally, we propose that mechanistic understanding of NF-κB deregulations may provide for improved therapeutic and prognostic tools in multiple myeloma.
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Affiliation(s)
- Payel Roy
- Systems Immunology Laboratory, National Institute of Immunology, Aruna Asaf Ali Marg, New Delhi 110067, India.
| | - Uday Aditya Sarkar
- Systems Immunology Laboratory, National Institute of Immunology, Aruna Asaf Ali Marg, New Delhi 110067, India.
| | - Soumen Basak
- Systems Immunology Laboratory, National Institute of Immunology, Aruna Asaf Ali Marg, New Delhi 110067, India.
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Xia L, Tan S, Zhou Y, Lin J, Wang H, Oyang L, Tian Y, Liu L, Su M, Wang H, Cao D, Liao Q. Role of the NFκB-signaling pathway in cancer. Onco Targets Ther 2018; 11:2063-2073. [PMID: 29695914 PMCID: PMC5905465 DOI: 10.2147/ott.s161109] [Citation(s) in RCA: 262] [Impact Index Per Article: 43.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Cancer is a group of cells that malignantly grow and proliferate uncontrollably. At present, treatment modes for cancer mainly comprise surgery, chemotherapy, radiotherapy, molecularly targeted therapy, gene therapy, and immunotherapy. However, the curative effects of these treatments have been limited thus far by specific characteristics of tumors. Abnormal activation of signaling pathways is involved in tumor pathogenesis and plays critical roles in growth, progression, and relapse of cancers. Targeted therapies against effectors in oncogenic signaling have improved the outcomes of cancer patients. NFκB is an important signaling pathway involved in pathogenesis and treatment of cancers. Excessive activation of the NFκB-signaling pathway has been documented in various tumor tissues, and studies on this signaling pathway for targeted cancer therapy have become a hot topic. In this review, we update current understanding of the NFκB-signaling pathway in cancer.
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Affiliation(s)
- Longzheng Xia
- Hunan Key Laboratory of Translational Radiation Oncology, Hunan Cancer Hospital and Affiliated Cancer Hospital of Xiangya School of Medicine, Changsha, Hunan, China
| | - Shiming Tan
- Hunan Key Laboratory of Translational Radiation Oncology, Hunan Cancer Hospital and Affiliated Cancer Hospital of Xiangya School of Medicine, Changsha, Hunan, China
| | - Yujuan Zhou
- Hunan Key Laboratory of Translational Radiation Oncology, Hunan Cancer Hospital and Affiliated Cancer Hospital of Xiangya School of Medicine, Changsha, Hunan, China
| | - Jingguan Lin
- Hunan Key Laboratory of Translational Radiation Oncology, Hunan Cancer Hospital and Affiliated Cancer Hospital of Xiangya School of Medicine, Changsha, Hunan, China
| | - Heran Wang
- Hunan Key Laboratory of Translational Radiation Oncology, Hunan Cancer Hospital and Affiliated Cancer Hospital of Xiangya School of Medicine, Changsha, Hunan, China
| | - Linda Oyang
- Hunan Key Laboratory of Translational Radiation Oncology, Hunan Cancer Hospital and Affiliated Cancer Hospital of Xiangya School of Medicine, Changsha, Hunan, China
| | - Yutong Tian
- Hunan Key Laboratory of Translational Radiation Oncology, Hunan Cancer Hospital and Affiliated Cancer Hospital of Xiangya School of Medicine, Changsha, Hunan, China
| | - Lu Liu
- Hunan Key Laboratory of Translational Radiation Oncology, Hunan Cancer Hospital and Affiliated Cancer Hospital of Xiangya School of Medicine, Changsha, Hunan, China
| | - Min Su
- Hunan Key Laboratory of Translational Radiation Oncology, Hunan Cancer Hospital and Affiliated Cancer Hospital of Xiangya School of Medicine, Changsha, Hunan, China
| | - Hui Wang
- Hunan Key Laboratory of Translational Radiation Oncology, Hunan Cancer Hospital and Affiliated Cancer Hospital of Xiangya School of Medicine, Changsha, Hunan, China
| | - Deliang Cao
- Hunan Key Laboratory of Translational Radiation Oncology, Hunan Cancer Hospital and Affiliated Cancer Hospital of Xiangya School of Medicine, Changsha, Hunan, China
- Department of Medical Microbiology, Immunology, and Cell Biology, Simmons Cancer Institute, Southern Illinois University School of Medicine, Springfield, IL, USA
| | - Qianjin Liao
- Hunan Key Laboratory of Translational Radiation Oncology, Hunan Cancer Hospital and Affiliated Cancer Hospital of Xiangya School of Medicine, Changsha, Hunan, China
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Miraghazadeh B, Cook MC. Nuclear Factor-kappaB in Autoimmunity: Man and Mouse. Front Immunol 2018; 9:613. [PMID: 29686669 PMCID: PMC5900062 DOI: 10.3389/fimmu.2018.00613] [Citation(s) in RCA: 71] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2017] [Accepted: 03/12/2018] [Indexed: 12/21/2022] Open
Abstract
NF-κB (nuclear factor-kappa B) is a transcription complex crucial for host defense mediated by innate and adaptive immunity, where canonical NF-κB signaling, mediated by nuclear translocation of RelA, c-Rel, and p50, is important for immune cell activation, differentiation, and survival. Non-canonical signaling mediated by nuclear translocation of p52 and RelB contributes to lymphocyte maturation and survival and is also crucial for lymphoid organogenesis. We outline NF-κB signaling and regulation, then summarize important molecular contributions of NF-κB to mechanisms of self-tolerance. We relate these mechanisms to autoimmune phenotypes described in what is now a substantial catalog of immune defects conferred by mutations in NF-κB pathways in mouse models. Finally, we describe Mendelian autoimmune syndromes arising from human NF-κB mutations, and speculate on implications for understanding sporadic autoimmune disease.
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Affiliation(s)
- Bahar Miraghazadeh
- Centre for Personalised Immunology, John Curtin School of Medical Research, Australian National University, Acton, ACT, Australia
- Translational Research Unit, Canberra Hospital, Acton, ACT, Australia
| | - Matthew C. Cook
- Centre for Personalised Immunology, John Curtin School of Medical Research, Australian National University, Acton, ACT, Australia
- Translational Research Unit, Canberra Hospital, Acton, ACT, Australia
- Department of Immunology, Canberra Hospital, Acton, ACT, Australia
- *Correspondence: Matthew C. Cook,
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Mukherjee T, Chatterjee B, Dhar A, Bais SS, Chawla M, Roy P, George A, Bal V, Rath S, Basak S. A TNF-p100 pathway subverts noncanonical NF-κB signaling in inflamed secondary lymphoid organs. EMBO J 2017; 36:3501-3516. [PMID: 29061763 PMCID: PMC5709727 DOI: 10.15252/embj.201796919] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2017] [Revised: 08/22/2017] [Accepted: 09/18/2017] [Indexed: 12/16/2022] Open
Abstract
Lymphotoxin-beta receptor (LTβR) present on stromal cells engages the noncanonical NF-κB pathway to mediate RelB-dependent expressions of homeostatic chemokines, which direct steady-state ingress of naïve lymphocytes to secondary lymphoid organs (SLOs). In this pathway, NIK promotes partial proteolysis of p100 into p52 that induces nuclear translocation of the RelB NF-κB heterodimers. Microbial infections often deplete homeostatic chemokines; it is thought that infection-inflicted destruction of stromal cells results in the downregulation of these chemokines. Whether inflammation per se also regulates these processes remains unclear. We show that TNF accumulated upon non-infectious immunization of mice similarly downregulates the expressions of these chemokines and consequently diminishes the ingress of naïve lymphocytes in inflamed SLOs. Mechanistically, TNF inactivated NIK in LTβR-stimulated cells and induced the synthesis of Nfkb2 mRNA encoding p100; these together potently accumulated unprocessed p100, which attenuated the RelB activity as inhibitory IκBδ. Finally, a lack of p100 alleviated these TNF-mediated inhibitions in inflamed SLOs of immunized Nfkb2-/- mice. In sum, we reveal that an inhibitory TNF-p100 pathway modulates the adaptive compartment during immune responses.
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Affiliation(s)
- Tapas Mukherjee
- Systems Immunology Laboratory National Institute of Immunology, New Delhi, India
- National Institute of Immunology, New Delhi, India
| | - Budhaditya Chatterjee
- Systems Immunology Laboratory National Institute of Immunology, New Delhi, India
- Kusuma School of Biological Sciences, IIT-Delhi, New Delhi, India
| | - Atika Dhar
- National Institute of Immunology, New Delhi, India
| | - Sachendra S Bais
- Systems Immunology Laboratory National Institute of Immunology, New Delhi, India
- National Institute of Immunology, New Delhi, India
| | - Meenakshi Chawla
- Systems Immunology Laboratory National Institute of Immunology, New Delhi, India
- National Institute of Immunology, New Delhi, India
| | - Payel Roy
- Systems Immunology Laboratory National Institute of Immunology, New Delhi, India
- National Institute of Immunology, New Delhi, India
| | - Anna George
- National Institute of Immunology, New Delhi, India
| | - Vineeta Bal
- National Institute of Immunology, New Delhi, India
| | | | - Soumen Basak
- Systems Immunology Laboratory National Institute of Immunology, New Delhi, India
- National Institute of Immunology, New Delhi, India
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36
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Su P, Liu X, Pang Y, Liu C, Li R, Zhang Q, Liang H, Wang H, Li Q. The archaic roles of the lamprey NF-κB (lj-NF-κB) in innate immune responses. Mol Immunol 2017; 92:21-27. [PMID: 29031044 DOI: 10.1016/j.molimm.2017.10.002] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2017] [Revised: 09/30/2017] [Accepted: 10/02/2017] [Indexed: 11/27/2022]
Abstract
The nuclear factor-kappa B (NF-κB) is a pleiotropic transcription factor regulating the expression of genes involved in various biological processes including the immune response and inflammation. Lamprey is regarded as a key species to provide meaningful clues for understanding the evolution of immune system; nevertheless, no information about lamprey NF-κB is reported. Thus, we have characterized a NF-κB homolog in lamprey (lj-NF-κB) for the deeper understanding of the role it played in lamprey immune system. The sequence and 3D structure analyses demonstrate that lj-NF-κB contained a Rel homology domain (RHD) and seven ankyrin repeats domains (ANKs), which would exhibit functional similarities to NF-κB superfamily proteins. This hypothesis was further proved by experiments. We found that the RHD of lj-NF-κB could interact with a mammalian κB response element, translocate to the nucleus to modulate gene (IL-6, IL-1β and TNF-α) expression, and the nuclear localization signals (NLS) was essential for the nuclear translocation. Furthermore, the ANKs of lj-NF-κB are the inhibition signal for the RHD of lj-NF-κB. The present results allow us to surmise that the lj-NF-κB should play a key role in immune response of lamprey, and the function of NF-κB has been maintained during evolution.
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Affiliation(s)
- Peng Su
- College of Life Science, Liaoning Normal University, Dalian 116082, China; Lamprey Research Center, Liaoning Normal University, Dalian 116082, China
| | - Xin Liu
- College of Life Science, Liaoning Normal University, Dalian 116082, China; Lamprey Research Center, Liaoning Normal University, Dalian 116082, China
| | - Yue Pang
- College of Life Science, Liaoning Normal University, Dalian 116082, China; Lamprey Research Center, Liaoning Normal University, Dalian 116082, China
| | - Chang Liu
- College of Life Science, Liaoning Normal University, Dalian 116082, China; Lamprey Research Center, Liaoning Normal University, Dalian 116082, China
| | - Ranran Li
- College of Life Science, Liaoning Normal University, Dalian 116082, China; Lamprey Research Center, Liaoning Normal University, Dalian 116082, China
| | - Qiong Zhang
- College of Life Science, Liaoning Normal University, Dalian 116082, China; Lamprey Research Center, Liaoning Normal University, Dalian 116082, China
| | - Hongfang Liang
- College of Life Science, Liaoning Normal University, Dalian 116082, China; Lamprey Research Center, Liaoning Normal University, Dalian 116082, China
| | - Hao Wang
- College of Life Science, Liaoning Normal University, Dalian 116082, China; Lamprey Research Center, Liaoning Normal University, Dalian 116082, China
| | - Qingwei Li
- College of Life Science, Liaoning Normal University, Dalian 116082, China; Lamprey Research Center, Liaoning Normal University, Dalian 116082, China.
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Jiang X, Yu M, Ou Y, Cao Y, Yao Y, Cai P, Zhang F. Downregulation of USP4 Promotes Activation of Microglia and Subsequent Neuronal Inflammation in Rat Spinal Cord After Injury. Neurochem Res 2017; 42:3245-3253. [PMID: 28755289 DOI: 10.1007/s11064-017-2361-2] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2016] [Revised: 06/11/2017] [Accepted: 07/18/2017] [Indexed: 01/03/2023]
Abstract
NF-κB is involved in the activation of microglia, which induces secondary spinal cord injury (SCI). This process involves the activation of NF-κB signaling pathway by TRAF6 through its polyubiquitination function. We know that deubiquitination of TRAF6 mediated by deubiquitinating enzyme (DUB) significantly inhibits activation of NF-κB pathway. The ubiquitin-specific protease 4 (USP4) belongs to the deubiquitinase family. Therefore, we hypothesize that USP4 is involved in the microglial activation and subsequent neuronal inflammation after SCI. In this study, we examined the expression and the role of USP4 after SCI. Western blot analysis showed that the expression of USP4 was downregulated and the expression of p-p65 was upregulated in the spinal cord after SCI. Immunohistochemical and immunofluorescence staining showed that USP4 was expressed in microglia but its expression decreased after SCI. In vitro LPS-induced activation of microglia showed decreased expression of USP4 and increased expression of p-p65 and TRAF6. USP4 silencing in LPS-induced activation of microglia promoted the expression of p-p65 and TRAF6 and the secretion of TNF-α and IL-1β. In conclusion, our study provides the first evidence that in microglial cells expression of USP4 decreases after SCI in rats. The downregulation of USP4 expression may promote microglial activation and subsequent neuronal inflammation through NF-κB by attenuating the deubiquitination of TRAF6. This mechanism is of great significance in the pathophysiology of secondary SCI.
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Affiliation(s)
- Xingjie Jiang
- Department of Orthopedics, Affiliated Hospital of Nantong University, Nantong, 226001, Jiangsu, China.,Jiangsu Clinical Medicine Center of Tissue Engineering and Nerve Injury Repair, Nantong, 226001, Jiangsu, China
| | - Mingchen Yu
- Medical College, Nantong University, Nantong, 226001, Jiangsu, China
| | - Yiqing Ou
- Medical College, Nantong University, Nantong, 226001, Jiangsu, China
| | - Yong Cao
- Department of Orthopedics, Affiliated Hospital of Nantong University, Nantong, 226001, Jiangsu, China.,Jiangsu Clinical Medicine Center of Tissue Engineering and Nerve Injury Repair, Nantong, 226001, Jiangsu, China
| | - Yu Yao
- Department of Orthopedics, Affiliated Hospital of Nantong University, Nantong, 226001, Jiangsu, China.,Jiangsu Clinical Medicine Center of Tissue Engineering and Nerve Injury Repair, Nantong, 226001, Jiangsu, China
| | - Ping Cai
- Department of Orthopedics and Traumatology, Jiangsu Province Hospital of TCM, Nanjing, 210029, Jiangsu, China
| | - Feng Zhang
- Department of Orthopedics, Affiliated Hospital of Nantong University, Nantong, 226001, Jiangsu, China. .,Jiangsu Clinical Medicine Center of Tissue Engineering and Nerve Injury Repair, Nantong, 226001, Jiangsu, China.
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Keogh CE, Scholz CC, Rodriguez J, Selfridge AC, von Kriegsheim A, Cummins EP. Carbon dioxide-dependent regulation of NF-κB family members RelB and p100 gives molecular insight into CO 2-dependent immune regulation. J Biol Chem 2017; 292:11561-11571. [PMID: 28507099 DOI: 10.1074/jbc.m116.755090] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2016] [Revised: 05/12/2017] [Indexed: 12/31/2022] Open
Abstract
CO2 is a physiological gas normally produced in the body during aerobic respiration. Hypercapnia (elevated blood pCO2 >≈50 mm Hg) is a feature of several lung pathologies, e.g. chronic obstructive pulmonary disease. Hypercapnia is associated with increased susceptibility to bacterial infections and suppression of inflammatory signaling. The NF-κB pathway has been implicated in these effects; however, the molecular mechanisms underpinning cellular sensitivity of the NF-κB pathway to CO2 are not fully elucidated. Here, we identify several novel CO2-dependent changes in the NF-κB pathway. NF-κB family members p100 and RelB translocate to the nucleus in response to CO2 A cohort of RelB protein-protein interactions (e.g. with Raf-1 and IκBα) are altered by CO2 exposure, although others are maintained (e.g. with p100). RelB is processed by CO2 in a manner dependent on a key C-terminal domain located in its transactivation domain. Loss of the RelB transactivation domain alters NF-κB-dependent transcriptional activity, and loss of p100 alters sensitivity of RelB to CO2 Thus, we provide molecular insight into the CO2 sensitivity of the NF-κB pathway and implicate altered RelB/p100-dependent signaling in the CO2-dependent regulation of inflammatory signaling.
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Affiliation(s)
- Ciara E Keogh
- From the School of Medicine and Conway Institute and
| | - Carsten C Scholz
- Systems Biology Ireland, University College Dublin, Dublin 4, Ireland.,the Institute of Physiology, University of Zürich, CH-8057 Zürich, Switzerland
| | - Javier Rodriguez
- Systems Biology Ireland, University College Dublin, Dublin 4, Ireland.,the Edinburgh Cancer Research Centre, Edinburgh EH4 2XR, Scotland, United Kingdom, and
| | | | - Alexander von Kriegsheim
- Systems Biology Ireland, University College Dublin, Dublin 4, Ireland.,the Edinburgh Cancer Research Centre, Edinburgh EH4 2XR, Scotland, United Kingdom, and
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Chatterjee B, Banoth B, Mukherjee T, Taye N, Vijayaragavan B, Chattopadhyay S, Gomes J, Basak S. Late-phase synthesis of IκBα insulates the TLR4-activated canonical NF-κB pathway from noncanonical NF-κB signaling in macrophages. Sci Signal 2016; 9:ra120. [PMID: 27923915 DOI: 10.1126/scisignal.aaf1129] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The nuclear factor κB (NF-κB) transcription factors coordinate the inflammatory immune response during microbial infection. Pathogenic substances engage canonical NF-κB signaling through the heterodimer RelA:p50, which is subjected to rapid negative feedback by inhibitor of κBα (IκBα). The noncanonical NF-κB pathway is required for the differentiation of immune cells; however, cross-talk between both pathways can occur. Concomitantly activated noncanonical signaling generates p52 from the p100 precursor. The synthesis of p100 is induced by canonical signaling, leading to the formation of the late-acting RelA:p52 heterodimer. This cross-talk prolongs inflammatory RelA activity in epithelial cells to ensure pathogen clearance. We found that the Toll-like receptor 4 (TLR4)-activated canonical NF-κB signaling pathway is insulated from lymphotoxin β receptor (LTβR)-induced noncanonical signaling in mouse macrophage cell lines. Combined computational and biochemical studies indicated that the extent of NF-κB-responsive expression of Nfkbia, which encodes IκBα, inversely correlated with cross-talk. The Nfkbia promoter showed enhanced responsiveness to NF-κB activation in macrophages compared to that in fibroblasts. We found that this hyperresponsive promoter engaged the RelA:p52 dimer generated during costimulation of macrophages through TLR4 and LTβR to trigger synthesis of IκBα at late time points, which prevented the late-acting RelA cross-talk response. Together, these data suggest that, despite the presence of identical signaling networks in cells of diverse lineages, emergent cross-talk between signaling pathways is subject to cell type-specific regulation. We propose that the insulation of canonical and noncanonical NF-κB pathways limits the deleterious effects of macrophage-mediated inflammation.
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Affiliation(s)
- Budhaditya Chatterjee
- Systems Immunology Laboratory, National Institute of Immunology, Aruna Asaf Ali Marg, New Delhi-110067, India.,Kusuma School of Biological Sciences, IIT-Delhi, Hauz Khas, New Delhi, India
| | - Balaji Banoth
- Systems Immunology Laboratory, National Institute of Immunology, Aruna Asaf Ali Marg, New Delhi-110067, India
| | - Tapas Mukherjee
- Systems Immunology Laboratory, National Institute of Immunology, Aruna Asaf Ali Marg, New Delhi-110067, India
| | | | - Bharath Vijayaragavan
- Systems Immunology Laboratory, National Institute of Immunology, Aruna Asaf Ali Marg, New Delhi-110067, India
| | | | - James Gomes
- Kusuma School of Biological Sciences, IIT-Delhi, Hauz Khas, New Delhi, India
| | - Soumen Basak
- Systems Immunology Laboratory, National Institute of Immunology, Aruna Asaf Ali Marg, New Delhi-110067, India
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Fusco AJ, Mazumder A, Wang VYF, Tao Z, Ware C, Ghosh G. The NF-κB subunit RelB controls p100 processing by competing with the kinases NIK and IKK1 for binding to p100. Sci Signal 2016; 9:ra96. [PMID: 27678221 DOI: 10.1126/scisignal.aad9413] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
The heterodimer formed by the nuclear factor κB (NF-κB) subunits p52 and RelB is the product of noncanonical signaling in which the key event is the proteolytic processing of p100 to generate p52. The kinases NF-κB-inducing kinase (NIK) and inhibitor of κB kinase 1 (IKK1; also known as IKKα) are activated during noncanonical signaling and play essential roles in p100 processing. In resting cells, RelB remains associated with unprocessed p100 as a transcriptionally inert p100:RelB complex, which is part of a larger assembly with other NF-κB factors known as the "kappaBsome." We investigated how these two different RelB-containing complexes with opposing effects on target gene transcription are formed. We found that RelB controls the extent of both p100 processing and kappaBsome formation during noncanonical signaling. Within an apparently "transitional" complex that contains RelB, NIK, IKK1, and p100, RelB and the NIK:IKK1 complex competed with each other for binding to a region of p100. A fraction of p100 in the transitional complex was refractory to processing, which resulted in the formation of the kappaBsome. However, another fraction of p100 protein underwent NIK:IKK1-mediated phosphorylation and processing while remaining bound to RelB, thus forming the p52:RelB heterodimer. Our results suggest that changes in the relative concentrations of RelB, NIK:IKK1, and p100 during noncanonical signaling modulate this transitional complex and are critical for maintaining the fine balance between the processing and protection of p100.
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Affiliation(s)
- Amanda J Fusco
- Department of Chemistry and Biochemistry, University of California San Diego, San Diego, CA 92093, USA
| | - Anup Mazumder
- Department of Chemistry and Biochemistry, University of California San Diego, San Diego, CA 92093, USA
| | - Vivien Ya-Fan Wang
- Faculty of Health Sciences, University of Macau, Avenida da Universidade, Taipa, Macau SAR, China
| | - Zhihua Tao
- Department of Chemistry and Biochemistry, University of California San Diego, San Diego, CA 92093, USA
| | - Carl Ware
- Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA 92037, USA
| | - Gourisankar Ghosh
- Department of Chemistry and Biochemistry, University of California San Diego, San Diego, CA 92093, USA.
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Leibowitz SM, Yan J. NF-κB Pathways in the Pathogenesis of Multiple Sclerosis and the Therapeutic Implications. Front Mol Neurosci 2016; 9:84. [PMID: 27695399 PMCID: PMC5023675 DOI: 10.3389/fnmol.2016.00084] [Citation(s) in RCA: 73] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2016] [Accepted: 08/29/2016] [Indexed: 01/01/2023] Open
Abstract
Nuclear factor kappa-light-chain-enhancer of activated B cells (NF-κB) signaling pathways are involved in cell immune responses, apoptosis and infections. In multiple sclerosis (MS), NF-κB pathways are changed, leading to increased levels of NF-κB activation in cells. This may indicate a key role for NF-κB in MS pathogenesis. NF-κB signaling is complex, with many elements involved in its activation and regulation. Interestingly, current MS treatments are found to be directly or indirectly linked to NF-κB pathways and act to adjust the innate and adaptive immune system in patients. In this review, we will first focus on the intricacies of NF-κB signaling, including the activating pathways and regulatory elements. Next, we will theorize about the role of NF-κB in MS pathogenesis, based on current research findings, and discuss some of the associated therapeutic implications. Lastly, we will review four new MS treatments which interrupt NF-κB pathways—fingolimod, teriflunomide, dimethyl fumarate (DMF) and laquinimod (LAQ)—and explain their mechanisms, and the possible strategy for MS treatments in the future.
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Affiliation(s)
- Saskia M Leibowitz
- UQ Centre for Clinical Research, The University of Queensland Brisbane, QLD, Australia
| | - Jun Yan
- UQ Centre for Clinical Research, The University of Queensland Brisbane, QLD, Australia
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42
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Cildir G, Low KC, Tergaonkar V. Noncanonical NF-κB Signaling in Health and Disease. Trends Mol Med 2016; 22:414-429. [PMID: 27068135 DOI: 10.1016/j.molmed.2016.03.002] [Citation(s) in RCA: 205] [Impact Index Per Article: 25.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2016] [Revised: 03/14/2016] [Accepted: 03/16/2016] [Indexed: 12/18/2022]
Abstract
Noncanonical NF-κB signaling differs from canonical NF-κB signaling by being activated through different cell surface receptors, cytoplasmic adaptors, and NF-κB dimers. Under normal physiological conditions, this noncanonical pathway has been implicated in diverse biological processes, including lymphoid organogenesis, B cell maturation, osteoclast differentiation, and various functions of other immune cells. Recently, dysfunction of this pathway has also been causally associated with numerous immune-mediated pathologies and human malignancies. Here, we summarize the core elements as well as the recently identified novel regulators of the noncanonical NF-κB signaling pathway. The involvement of this pathway in different pathologies and the potential therapeutic options that are currently envisaged are also discussed.
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Affiliation(s)
- Gökhan Cildir
- Laboratory of NF-κB Signaling, Institute of Molecular and Cell Biology (IMCB), 61 Biopolis Drive, Proteos, Singapore 138673, Singapore; Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore (NUS), Singapore 117597, Singapore
| | - Kee Chung Low
- Laboratory of NF-κB Signaling, Institute of Molecular and Cell Biology (IMCB), 61 Biopolis Drive, Proteos, Singapore 138673, Singapore
| | - Vinay Tergaonkar
- Laboratory of NF-κB Signaling, Institute of Molecular and Cell Biology (IMCB), 61 Biopolis Drive, Proteos, Singapore 138673, Singapore; Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore (NUS), Singapore 117597, Singapore; Centre for Cancer Biology, University of South Australia and SA Pathology, Adelaide, SA 5000, Australia.
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43
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Banoth B, Chatterjee B, Vijayaragavan B, Prasad MVR, Roy P, Basak S. Stimulus-selective crosstalk via the NF-κB signaling system reinforces innate immune response to alleviate gut infection. eLife 2015; 4. [PMID: 25905673 PMCID: PMC4432492 DOI: 10.7554/elife.05648] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2014] [Accepted: 04/22/2015] [Indexed: 01/16/2023] Open
Abstract
Tissue microenvironment functions as an important determinant of the inflammatory response elicited by the resident cells. Yet, the underlying molecular mechanisms remain obscure. Our systems-level analyses identified a duration code that instructs stimulus specific crosstalk between TLR4-activated canonical NF-κB pathway and lymphotoxin-β receptor (LTβR) induced non-canonical NF-κB signaling. Indeed, LTβR costimulation synergistically enhanced the late RelA/NF-κB response to TLR4 prolonging NF-κB target gene-expressions. Concomitant LTβR signal targeted TLR4-induced newly synthesized p100, encoded by Nfkb2, for processing into p52 that not only neutralized p100 mediated inhibitions, but potently generated RelA:p52/NF-κB activity in a positive feedback loop. Finally, Nfkb2 connected lymphotoxin signal within the intestinal niche in reinforcing epithelial innate inflammatory RelA/NF-κB response to Citrobacter rodentium infection, while Nfkb2−/− mice succumbed to gut infections owing to stromal defects. In sum, our results suggest that signal integration via the pleiotropic NF-κB system enables tissue microenvironment derived cues in calibrating physiological responses. DOI:http://dx.doi.org/10.7554/eLife.05648.001 The innate immune system is the body's first line of defense against infection and disease. Innate immune cells are found in every tissue type, poised to respond immediately to damaged, stressed, or infected host cells. When innate immune cells recognize any injury or infection, one of the first things they do is trigger the inflammatory response. Fluid and other immune cells then move from the blood into the injured tissues. This movement can cause redness and swelling. But the response helps to establish a physical barrier against the spread of infection, promotes the elimination of both invading microbes and damaged host cells, and encourages the repair of the tissue. Inflammation is tightly controlled. If the response is too weak, it could leave an individual prone to serious infection. On the other hand, excessive inflammation can severely damage healthy cells and tissues. Inflammation is regulated differently in different tissue types, and the environment within the tissue itself influences the activity of local innate immune cells and the inflammatory response. However, the molecular mechanisms responsible for receiving and interpreting the signals derived from the host tissue remain unknown. Now, Banoth et al., have revealed that the integration of inflammation-provoking signals, such as injury or infection and cues from the tissue environment occurs via the so-called ‘NF-κB signaling system’. NF-κB is a protein found in almost all cell types, and when activated it is able to switch on the expression of many different genes. Banoth et al. explain that signal integration via the NF-κB system enables cues from the tissue environment to tune a cell's responses. Further experiments confirmed the importance of this signal integration by showing how a signal coming from intestinal tissue can influence the activity of innate immune cells and inflammation in the gut. These findings suggest that a breakdown in the NF-κB signaling system's ability to integrate multiple signals, including those derived from the tissue environment, may be responsible for many inflammatory disorders, and in particular those that involve the gut. Future work is now needed to explore this possibility. DOI:http://dx.doi.org/10.7554/eLife.05648.002
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Affiliation(s)
- Balaji Banoth
- Systems Immunology Laboratory, National Institute of Immunology, New Delhi, India
| | | | | | - M V R Prasad
- Systems Immunology Laboratory, National Institute of Immunology, New Delhi, India
| | - Payel Roy
- Systems Immunology Laboratory, National Institute of Immunology, New Delhi, India
| | - Soumen Basak
- Systems Immunology Laboratory, National Institute of Immunology, New Delhi, India
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