1
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Pomerantz JL, Milner JD, Snow AL. Elevated IgE from attenuated CARD11 signaling: lessons from atopic mice and humans. Curr Opin Immunol 2022; 79:102255. [PMID: 36334349 PMCID: PMC10424059 DOI: 10.1016/j.coi.2022.102255] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2022] [Revised: 08/17/2022] [Accepted: 09/30/2022] [Indexed: 11/07/2022]
Abstract
CARD11 encodes a large scaffold protein responsible for integrating antigen-receptor engagement with downstream signaling to NF-kB and other outputs in lymphocytes. Over the past 10 years, several human-inborn errors of immunity have been linked to pathogenic CARD11 mutations. Most recently, severe atopic patients were discovered that carried heterozygous dominant-negative CARD11 mutations. Here, we review the mechanistic connections between attenuated CARD11 signaling, elevated IgE, and atopy, comparing and contrasting key insights from both human patients and murine models. Continued investigation of abnormal CARD11 signaling in both contexts should inform novel therapeutic strategies to combat allergic pathogenesis.
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Affiliation(s)
- Joel L Pomerantz
- Department of Biological Chemistry, Institute for Cell Engineering, The Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Joshua D Milner
- Department of Pediatrics, Columbia University Irving Medical Center, New York, NY, USA
| | - Andrew L Snow
- Department of Pharmacology & Molecular Therapeutics, Uniformed Services University of the Health Sciences, Bethesda, MD, USA.
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2
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Kutzner K, Woods S, Karayel O, Gehring T, Yin H, Flatley A, Graß C, Wimberger N, Tofaute MJ, Seeholzer T, Feederle R, Mann M, Krappmann D. Phosphorylation of serine-893 in CARD11 suppresses the formation and activity of the CARD11-BCL10-MALT1 complex in T and B cells. Sci Signal 2022; 15:eabk3083. [PMID: 35230873 DOI: 10.1126/scisignal.abk3083] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
CARD11 acts as a gatekeeper for adaptive immune responses after T cell or B cell antigen receptor (TCR/BCR) ligation on lymphocytes. PKCθ/β-catalyzed phosphorylation of CARD11 promotes the assembly of the CARD11-BCL10-MALT1 (CBM) complex and lymphocyte activation. Here, we demonstrated that PKCθ/β-dependent CARD11 phosphorylation also suppressed CARD11 functions in T or B cells. Through mass spectrometry-based proteomics analysis, we identified multiple constitutive and inducible CARD11 phosphorylation sites in T cells. We demonstrated that a single TCR- or BCR-inducible phosphorylation on Ser893 in the carboxyl terminus of CARD11 prevented the activation of the transcription factor NF-κB, the kinase JNK, and the protease MALT1. Moreover, CARD11 Ser893 phosphorylation sensitized BCR-addicted lymphoma cells to toxicity induced by Bruton's tyrosine kinase (BTK) inhibitors. Phosphorylation of Ser893 in CARD11 by PKCθ controlled the strength of CARD11 scaffolding by impairing the formation of the CBM complex. Thus, PKCθ simultaneously catalyzes both stimulatory and inhibitory CARD11 phosphorylation events, which shape the strength of CARD11 signaling in lymphocytes.
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Affiliation(s)
- Kerstin Kutzner
- Research Unit Cellular Signal Integration, Helmholtz Zentrum München-German Research Center for Environmental Health. Ingolstaedter Landstr. 1, 85764 Neuherberg, Germany
| | - Simone Woods
- Research Unit Cellular Signal Integration, Helmholtz Zentrum München-German Research Center for Environmental Health. Ingolstaedter Landstr. 1, 85764 Neuherberg, Germany
| | - Ozge Karayel
- Department of Proteomics and Signal Transduction, Max Planck Institute of Biochemistry, Am Klopferspitz 18, 82152 Planegg, Germany
| | - Torben Gehring
- Research Unit Cellular Signal Integration, Helmholtz Zentrum München-German Research Center for Environmental Health. Ingolstaedter Landstr. 1, 85764 Neuherberg, Germany
| | - Hongli Yin
- Research Unit Cellular Signal Integration, Helmholtz Zentrum München-German Research Center for Environmental Health. Ingolstaedter Landstr. 1, 85764 Neuherberg, Germany
| | - Andrew Flatley
- Monoclonal Antibody Core Facility, Institute for Diabetes and Obesity, Helmholtz Zentrum München-German Research Center for Environmental Health, Ingolstaedter Landstr. 1, 85764 Neuherberg, Germany
| | - Carina Graß
- Research Unit Cellular Signal Integration, Helmholtz Zentrum München-German Research Center for Environmental Health. Ingolstaedter Landstr. 1, 85764 Neuherberg, Germany
| | - Nicole Wimberger
- Research Unit Cellular Signal Integration, Helmholtz Zentrum München-German Research Center for Environmental Health. Ingolstaedter Landstr. 1, 85764 Neuherberg, Germany
| | - Marie J Tofaute
- Research Unit Cellular Signal Integration, Helmholtz Zentrum München-German Research Center for Environmental Health. Ingolstaedter Landstr. 1, 85764 Neuherberg, Germany
| | - Thomas Seeholzer
- Research Unit Cellular Signal Integration, Helmholtz Zentrum München-German Research Center for Environmental Health. Ingolstaedter Landstr. 1, 85764 Neuherberg, Germany
| | - Regina Feederle
- Monoclonal Antibody Core Facility, Institute for Diabetes and Obesity, Helmholtz Zentrum München-German Research Center for Environmental Health, Ingolstaedter Landstr. 1, 85764 Neuherberg, Germany
| | - Matthias Mann
- Department of Proteomics and Signal Transduction, Max Planck Institute of Biochemistry, Am Klopferspitz 18, 82152 Planegg, Germany
| | - Daniel Krappmann
- Research Unit Cellular Signal Integration, Helmholtz Zentrum München-German Research Center for Environmental Health. Ingolstaedter Landstr. 1, 85764 Neuherberg, Germany
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3
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Bedsaul JR, Shah N, Hutcherson SM, Pomerantz JL. Mechanistic impact of oligomer poisoning by dominant-negative CARD11 variants. iScience 2022; 25:103810. [PMID: 35198875 PMCID: PMC8844825 DOI: 10.1016/j.isci.2022.103810] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2021] [Revised: 12/10/2021] [Accepted: 01/19/2022] [Indexed: 11/25/2022] Open
Abstract
The CARD11 scaffold controls antigen receptor signaling to NF-κB, JNK, and mTOR. Three classes of germline mutations in CARD11 cause Primary Immunodeficiency, including homozygous loss-of-function (LOF) mutations in CARD11 deficiency, heterozygous gain-of-function (GOF) mutations in BENTA disease, and heterozygous dominant-negative LOF mutations in CADINS. Here, we characterize LOF CARD11 mutants with a range of dominant-negative activities to identify the mechanistic properties that cause these variants to exert dominant effects when heterozygous. We find that strong dominant negatives can poison signaling from mixed wild-type:mutant oligomers at two steps in the CARD11 signaling cycle, at the Opening Step and at the Cofactor Association Step. Our findings provide evidence that CARD11 oligomer subunits cooperate in at least two steps during antigen receptor signaling and reveal how different LOF mutations in the same oligomeric signaling hub may cause disease with different inheritance patterns.
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Affiliation(s)
- Jacquelyn R. Bedsaul
- Department of Biological Chemistry and Institute for Cell Engineering, The Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Neha Shah
- Department of Biological Chemistry and Institute for Cell Engineering, The Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Shelby M. Hutcherson
- Department of Biological Chemistry and Institute for Cell Engineering, The Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Joel L. Pomerantz
- Department of Biological Chemistry and Institute for Cell Engineering, The Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
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4
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Shi X, Xia S, Chu Y, Yang N, Zheng J, Chen Q, Fen Z, Jiang Y, Fang S, Lin J. CARD11 is a prognostic biomarker and correlated with immune infiltrates in uveal melanoma. PLoS One 2021; 16:e0255293. [PMID: 34370778 PMCID: PMC8351993 DOI: 10.1371/journal.pone.0255293] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2021] [Accepted: 07/13/2021] [Indexed: 12/15/2022] Open
Abstract
Uveal melanoma (UVM), the most common primary intraocular malignancy, has a high mortality because of a high propensity to metastasize. Our study analyzed prognostic value and immune-related characteristics of CARD11 in UVM, hoping to provide a potential management and research direction. The RNA-sequence data of 80 UVM patients were downloaded from The Cancer Genome Atlas database and divided them into high- and low-expression groups. We analyzed the differentially expressed genes, enrichment analyses and the infiltration of immune cells using the R package and Gene-Set Enrichment Analysis. A clinical prediction nomogram and protein-protein interaction network were constructed and the first 8 genes were considered as the hub-genes. Finally, we constructed a competing endogenous RNA (ceRNA) network by Cytoscape and analyzed the statistical data via the R software. Here we found that CARD11 expression had notable correlation with UVM clinicopathological features, which was also an independent predictor for overall survival (OS). Intriguingly, CARD11 had a positively correlation to autophagy, cellular senescence and apoptosis. Infiltration of monocytes was significantly higher in low CARD11 expression group, and infiltration of T cells regulatory was lower in the same group. Functional enrichment analyses revealed that CARD11 was positively related to T cell activation pathways and cell adhesion molecules. The expressions of hub-genes were all increased in the high CARD11 expression group and the ceRNA network showed the interaction among mRNA, miRNA and lncRNA. These findings show that high CARD11 expression in UVM is associated with poor OS, indicating that CARD11 may serve as a potential biomarker for the diagnosis and prognosis of the UVM.
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Affiliation(s)
- Xueying Shi
- Clinical Laboratory of Integrative Medicine, The First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning, China
- Institute (College) of Integrative Medicine, Dalian Medical University, Dalian, Liaoning, China
| | - Shilin Xia
- Clinical Laboratory of Integrative Medicine, The First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning, China
| | - Yingming Chu
- Department of Integrated Traditional Chinese Medicine, Peking University First Hospital, Beijing, China
| | - Nan Yang
- Institute (College) of Integrative Medicine, Dalian Medical University, Dalian, Liaoning, China
- Department of Nephrology, The First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning, China
| | - Jingyuan Zheng
- Institute (College) of Integrative Medicine, Dalian Medical University, Dalian, Liaoning, China
| | - Qianyi Chen
- Institute (College) of Integrative Medicine, Dalian Medical University, Dalian, Liaoning, China
| | - Zeng Fen
- Institute (College) of Integrative Medicine, Dalian Medical University, Dalian, Liaoning, China
| | - Yuankuan Jiang
- Department of Dermatology, The First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning, China
| | - Shifeng Fang
- Department of Ophthalmology, The First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning, China
| | - Jingrong Lin
- Department of Dermatology, The First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning, China
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Hutcherson SM, Bedsaul JR, Pomerantz JL. Pathway-Specific Defects in T, B, and NK Cells and Age-Dependent Development of High IgE in Mice Heterozygous for a CADINS-Associated Dominant Negative CARD11 Allele. THE JOURNAL OF IMMUNOLOGY 2021; 207:1150-1164. [PMID: 34341167 DOI: 10.4049/jimmunol.2001233] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Accepted: 06/19/2021] [Indexed: 12/13/2022]
Abstract
CARD11 is a multidomain scaffold protein required for normal activation of NF-κB, JNK, and mTOR during Ag receptor signaling. Germline CARD11 mutations cause at least three types of primary immunodeficiency including CARD11 deficiency, B cell expansion with NF-κB and T cell anergy (BENTA), and CARD11-associated atopy with dominant interference of NF-κB signaling (CADINS). CADINS is uniquely caused by heterozygous loss-of-function CARD11 alleles that act as dominant negatives. CADINS patients present with frequent respiratory and skin infections, asthma, allergies, and atopic dermatitis. However, precisely how a heterozygous dominant negative CARD11 allele leads to the development of this CADINS-specific cluster of symptoms remains poorly understood. To address this, we generated mice expressing the CARD11 R30W allele originally identified in patients. We find that CARD11R30W/+ mice exhibit impaired signaling downstream of CARD11 that leads to defects in T, B, and NK cell function and immunodeficiency. CARD11R30W/+ mice develop elevated serum IgE levels with 50% penetrance that becomes more pronounced with age, but do not develop spontaneous atopic dermatitis. CARD11R30W/+ mice display reduced regulatory T cell numbers, but not the Th2 expansion observed in other mice with diminished CARD11 activity. Interestingly, the presence of mixed CARD11 oligomers in CARD11R30W/+ mice causes more severe signaling defects in T cells than in B cells, and specifically impacts IFN-γ production by NK cells, but not NK cell cytotoxicity. Our findings help explain the high susceptibility of CADINS patients to infection and suggest that the development of high serum IgE is not sufficient to induce overt atopic symptoms.
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Affiliation(s)
- Shelby M Hutcherson
- Department of Biological Chemistry and Institute for Cell Engineering, The Johns Hopkins University School of Medicine, Baltimore, MD
| | - Jacquelyn R Bedsaul
- Department of Biological Chemistry and Institute for Cell Engineering, The Johns Hopkins University School of Medicine, Baltimore, MD
| | - Joel L Pomerantz
- Department of Biological Chemistry and Institute for Cell Engineering, The Johns Hopkins University School of Medicine, Baltimore, MD
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6
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Mechanistic understanding of the combined immunodeficiency in complete human CARD11 deficiency. J Allergy Clin Immunol 2021; 148:1559-1574.e13. [PMID: 33872653 DOI: 10.1016/j.jaci.2021.04.006] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2020] [Revised: 04/01/2021] [Accepted: 04/07/2021] [Indexed: 01/04/2023]
Abstract
BACKGROUND Germline pathogenic variants impairing the caspase recruitment domain family member 11 (CARD11)-B cell chronic lymphocytic leukemia/lymphoma 10 (BCL10)-MALT1 paracaspase (MALT1) (CBM) complex are associated with diverse human diseases including combined immunodeficiency (CID), atopy, and lymphoproliferation. However, the impact of CARD11 deficiency on human B-cell development, signaling, and function is incompletely understood. OBJECTIVES This study sought to determine the cellular, immunological, and biochemical basis of disease for 2 unrelated patients who presented with profound CID associated with viral and fungal respiratory infections, interstitial lung disease, and severe colitis. METHODS Patients underwent next-generation sequencing, immunophenotyping by flow cytometry, signaling assays by immunoblot, and transcriptome profiling by RNA-sequencing. RESULTS Both patients carried identical novel pathogenic biallelic loss-of-function variants in CARD11 (c.2509C>T; p.Arg837∗) leading to undetectable protein expression. This variant prevented CBM complex formation, severely impairing the activation of nuclear factor-κB, c-Jun N-terminal kinase, and MALT1 paracaspase activity in B and T cells. This functional defect resulted in a developmental block in B cells at the naive and type 1 transitional B-cell stage and impaired circulating T follicular helper cell (cTFH) development, which was associated with impaired antibody responses and absent germinal center structures on lymph node histology. Transcriptomics indicated that CARD11-dependent signaling is essential for immune signaling pathways involved in the development of these cells. Both patients underwent hematopoietic stem cell transplantations, which led to functional normalization. CONCLUSIONS Complete human CARD11 deficiency causes profound CID by impairing naive/type 1 B-cell and cTFH cell development and abolishing activation of MALT1 paracaspase, NF-κB, and JNK activity. Hematopoietic stem cell transplantation functionally restores impaired signaling pathways.
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Sakihama S, Morichika K, Saito R, Miyara M, Miyagi T, Hayashi M, Uchihara J, Tomoyose T, Ohshiro K, Nakayama S, Nakachi S, Morishima S, Sakai K, Nishio K, Masuzaki H, Fukushima T, Karube K. Genetic profile of adult T-cell leukemia/lymphoma in Okinawa: Association with prognosis, ethnicity, and HTLV-1 strains. Cancer Sci 2021; 112:1300-1309. [PMID: 33426772 PMCID: PMC7935801 DOI: 10.1111/cas.14806] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2020] [Revised: 12/03/2020] [Accepted: 01/05/2021] [Indexed: 12/26/2022] Open
Abstract
Genetic alterations in adult T-cell leukemia/lymphoma (ATLL), a T-cell malignancy associated with HTLV-1, and their clinical impacts, especially from the perspective of viral strains, are not fully elucidated. We employed targeted next-generation sequencing and single nucleotide polymorphism array for 89 patients with ATLL in Okinawa, the southernmost islands in Japan, where the frequency of HTLV-1 tax subgroup-A (HTLV-1-taxA) is notably higher than that in mainland Japan, where most ATLL cases have HTLV-1-taxB, and compared the results with previously reported genomic landscapes of ATLL in mainland Japan and the USA. Okinawan patients exhibited similar mutation profiles to mainland Japanese patients, with frequent alterations in TCR/NF-ĸB (eg, PRKCB, PLCG1, and CARD11) and T-cell trafficking pathways (CCR4 and CCR7), in contrast with North American patients who exhibited a predominance of epigenome-associated gene mutations. Some mutations, especially GATA3 and RHOA, were detected more frequently in Okinawan patients than in mainland Japanese patients. Compared to HTLV-1-taxB, HTLV-1-taxA was significantly dominant in Okinawan patients with these mutations (GATA3, 34.1% vs 14.6%, P = .044; RHOA, 24.4% vs 6.3%, P = .032), suggesting the contribution of viral strains to these mutation frequencies. From a clinical viewpoint, we identified a significant negative impact of biallelic inactivation of PRDM1 (P = .027) in addition to the previously reported PRKCB mutations, indicating the importance of integrated genetic analysis. This study suggests that heterogeneous genetic abnormalities in ATLL depend on the viral strain as well as on the ethnic background. This warrants the need to develop therapeutic interventions considering regional characteristics.
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Affiliation(s)
- Shugo Sakihama
- Department of Pathology and Cell BiologyGraduate School of MedicineUniversity of the RyukyusNishiharaJapan
| | - Kazuho Morichika
- Division of Endocrinology, Diabetes and Metabolism, Hematology, Rheumatology (Second Department of Internal Medicine)Graduate School of MedicineUniversity of the RyukyusNishiharaJapan
| | - Rumiko Saito
- Life Science Analytic CenterLife Science Business OfficeCorporate Technology Planning DivisionToshiba CorporationSendaiJapan
| | - Megumi Miyara
- Faculty of Health and NutritionOkinawa UniversityNahaJapan
| | - Takashi Miyagi
- Department of HematologyHeartlife HospitalNakagusukuJapan
| | | | | | | | - Kazuiku Ohshiro
- Department of Hematology & OncologyOkinawa Prefectural Nanbu Medical Center & Children's Medical CenterHaebaruJapan
| | | | - Sawako Nakachi
- Division of Endocrinology, Diabetes and Metabolism, Hematology, Rheumatology (Second Department of Internal Medicine)Graduate School of MedicineUniversity of the RyukyusNishiharaJapan
| | - Satoko Morishima
- Division of Endocrinology, Diabetes and Metabolism, Hematology, Rheumatology (Second Department of Internal Medicine)Graduate School of MedicineUniversity of the RyukyusNishiharaJapan
| | - Kazuko Sakai
- Department of Genome BiologyKindai University Faculty of MedicineOsaka‐SayamaJapan
| | - Kazuto Nishio
- Department of Genome BiologyKindai University Faculty of MedicineOsaka‐SayamaJapan
| | - Hiroaki Masuzaki
- Division of Endocrinology, Diabetes and Metabolism, Hematology, Rheumatology (Second Department of Internal Medicine)Graduate School of MedicineUniversity of the RyukyusNishiharaJapan
| | - Takuya Fukushima
- Laboratory of HematoimmunologyGraduate School of Health SciencesUniversity of the RyukyusNishiharaJapan
| | - Kennosuke Karube
- Department of Pathology and Cell BiologyGraduate School of MedicineUniversity of the RyukyusNishiharaJapan
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Pomerantz JL. Reconsidering phosphorylation in the control of inducible CARD11 scaffold activity during antigen receptor signaling. Adv Biol Regul 2021; 79:100775. [PMID: 33358178 PMCID: PMC7920944 DOI: 10.1016/j.jbior.2020.100775] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2020] [Revised: 12/07/2020] [Accepted: 12/09/2020] [Indexed: 12/01/2022]
Abstract
Protein phosphorylation is a commonly used regulatory step that controls signal transduction pathways in a wide array of biological contexts. The finding that a residue is phosphorylated, coupled with the observation that mutation of that residue impacts signaling, often forms the basis for concluding that the phosphorylation of that residue is a key signaling step. However, in certain cases, the situation is more complicated and warrants further study to obtain a clear mechanistic understanding of whether and how the kinase-mediated modification in question is important. CARD11 is a multi-domain signaling scaffold that functions as a hub in lymphocytes to transmit the engagement of antigen receptors into the activation of NF-κB, JNK and mTOR. The phosphorylation of the CARD11 autoinhibitory Inhibitory Domain in response to antigen receptor triggering has been proposed to control the signal-induced conversion of CARD11 from an inactive to an active scaffold in a step required for lymphocyte activation. In this review, I discuss recent data that suggests that this model should be reconsidered for certain phosphorylation events in CARD11 and propose possible experimental avenues for resolution of raised issues.
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Affiliation(s)
- Joel L Pomerantz
- Department of Biological Chemistry, Institute for Cell Engineering, The Johns Hopkins University School of Medicine, Miller Research Building, Room 623, 733 N Broadway, Baltimore, MD, 21205, USA.
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Lan L, Xu M, Li J, Liu L, Xu M, Zhou C, Shen L, Tang Z, Wan F. Mas-related G protein-coupled receptor D participates in inflammatory pain by promoting NF-κB activation through interaction with TAK1 and IKK complex. Cell Signal 2020; 76:109813. [DOI: 10.1016/j.cellsig.2020.109813] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Revised: 10/15/2020] [Accepted: 10/16/2020] [Indexed: 01/28/2023]
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10
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Mellett M. Regulation and dysregulation of CARD14 signalling and its physiological consequences in inflammatory skin disease. Cell Immunol 2020; 354:104147. [DOI: 10.1016/j.cellimm.2020.104147] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2019] [Revised: 04/17/2020] [Accepted: 06/08/2020] [Indexed: 12/11/2022]
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Douanne T, Chapelier S, Rottapel R, Gavard J, Bidère N. The LUBAC participates in lysophosphatidic acid-induced NF-κB activation. Cell Immunol 2020; 353:104133. [PMID: 32450431 DOI: 10.1016/j.cellimm.2020.104133] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2020] [Revised: 04/29/2020] [Accepted: 05/12/2020] [Indexed: 12/16/2022]
Abstract
The natural bioactive glycerophospholipid lysophosphatidic acid (LPA) binds to its cognate G protein-coupled receptors (GPCRs) on the cell surface to promote the activation of several transcription factors, including NF-κB. LPA-mediated activation of NF-κB relies on the formation of a signalosome that contains the scaffold CARMA3, the adaptor BCL10 and the paracaspase MALT1 (CBM complex). The CBM complex has been extensively studied in lymphocytes, where it links antigen receptors to NF-κB activation via the recruitment of the linear ubiquitin assembly complex (LUBAC), a tripartite complex of HOIP, HOIL1 and SHARPIN. Moreover, MALT1 cleaves the LUBAC subunit HOIL1 to further enhance NF-κB activation. However, the contribution of the LUBAC downstream of GPCRs has not been investigated. By using murine embryonic fibroblasts from mice deficient for HOIP, HOIL1 and SHARPIN, we report that the LUBAC is crucial for the activation of NF-κB in response to LPA. Further echoing the situation in lymphocytes, LPA unbridles the protease activity of MALT1, which cleaves HOIL1 at the Arginine 165. The expression of a MALT1-insensitive version of HOIL1 reveals that this processing is involved in the optimal production of the NF-κB target cytokine interleukin-6. Lastly, we provide evidence that the guanine exchange factor GEF-H1 favors MALT1-mediated cleavage of HOIL1 and NF-κB signaling in this context. Together, our results unveil a critical role for the LUBAC as a positive regulator of NF-κB signaling downstream of LPA receptors.
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Affiliation(s)
- Tiphaine Douanne
- Université de Nantes, INSERM, CNRS, CRCINA, Team SOAP, F-440000 Nantes, France
| | - Sarah Chapelier
- Université de Nantes, INSERM, CNRS, CRCINA, Team SOAP, F-440000 Nantes, France
| | - Robert Rottapel
- Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario, Canada
| | - Julie Gavard
- Université de Nantes, INSERM, CNRS, CRCINA, Team SOAP, F-440000 Nantes, France; Institut de Cancérologie de l'Ouest, Site René Gauducheau, 44800 Saint-Herblain, France
| | - Nicolas Bidère
- Université de Nantes, INSERM, CNRS, CRCINA, Team SOAP, F-440000 Nantes, France.
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