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Wang X, Zhu W, Chen H, Li X, Zheng W, Zhang Y, Fan N, Chen X, Wang G. JNK signaling mediates acute rejection via activating autophagy of CD8 + T cells after liver transplantation in rats. Front Immunol 2024; 15:1359859. [PMID: 38562941 PMCID: PMC10982410 DOI: 10.3389/fimmu.2024.1359859] [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: 12/22/2023] [Accepted: 03/04/2024] [Indexed: 04/04/2024] Open
Abstract
Background Acute rejection (AR) after liver transplantation (LT) remains an important factor affecting the prognosis of patients. CD8+ T cells are considered to be important regulatory T lymphocytes involved in AR after LT. Our previous study confirmed that autophagy mediated AR by promoting activation and proliferation of CD8+ T cells. However, the underlying mechanisms regulating autophagy in CD8+ T cells during AR remain unclear. Methods Human liver biopsy specimens of AR after orthotopic LT were collected to assess the relationship between JNK and CD8+ T cells autophagy. The effect of JNK inhibition on CD8+ T cells autophagy and its role in AR were further examined in rats. Besides, the underlying mechanisms how JNK regulated the autophagy of CD8+ T cells were further explored. Results The expression of JNK is positive correlated with the autophagy level of CD8+ T cells in AR patients. And similar findings were obtained in rats after LT. Further, JNK inhibitor remarkably inhibited the autophagy of CD8+ T cells in rat LT recipients. In addition, administration of JNK inhibitor significantly attenuated AR injury by promoting the apoptosis and downregulating the function of CD8+ T cells. Mechanistically, JNK may activate the autophagy of CD8+ T cells through upregulating BECN1 by inhibiting the formation of Bcl-2/BECN1 complex. Conclusion JNK signaling promoted CD8+ T cells autophagy to mediate AR after LT, providing a theoretical basis for finding new drug targets for the prevention and treatment of AR after LT.
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Affiliation(s)
- Xiaowen Wang
- Department of Hepatic Surgery, Liver Transplantation, The Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China
- Guangdong Key Laboratory of Liver Disease Research, The Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China
| | - Wenfeng Zhu
- Department of Hepatic Surgery, Liver Transplantation, The Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China
- Guangdong Key Laboratory of Liver Disease Research, The Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China
| | - Haoqi Chen
- Department of Hepatic Surgery, Liver Transplantation, The Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China
- Guangdong Key Laboratory of Liver Disease Research, The Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China
| | - Xuejiao Li
- Guangdong Key Laboratory of Liver Disease Research, The Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China
| | - Wenjie Zheng
- Department of Hepatic Surgery, Liver Transplantation, The Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China
- Guangdong Key Laboratory of Liver Disease Research, The Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China
| | - Yuan Zhang
- State Key Laboratory of Traditional Chinese Medicine Syndrome, Guangdong Provincial Hospital of Chinese Medicine, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Ning Fan
- State Key Laboratory of Traditional Chinese Medicine Syndrome, Guangdong Provincial Hospital of Chinese Medicine, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Xiaolong Chen
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of Jinan University, Guangzhou, China
| | - Genshu Wang
- State Key Laboratory of Traditional Chinese Medicine Syndrome, Guangdong Provincial Hospital of Chinese Medicine, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China
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2
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Ng GYQ, Loh ZWL, Fann DY, Mallilankaraman K, Arumugam TV, Hande MP. Role of Mitogen-Activated Protein (MAP) Kinase Pathways in Metabolic Diseases. Genome Integr 2024; 15:e20230003. [PMID: 38770527 PMCID: PMC11102075 DOI: 10.14293/genint.14.1.004] [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] [Indexed: 05/22/2024] Open
Abstract
Physiological processes that govern the normal functioning of mammalian cells are regulated by a myriad of signalling pathways. Mammalian mitogen-activated protein (MAP) kinases constitute one of the major signalling arms and have been broadly classified into four groups that include extracellular signal-regulated protein kinase (ERK), c-Jun N-terminal kinase (JNK), p38, and ERK5. Each signalling cascade is governed by a wide array of external and cellular stimuli, which play a critical part in mammalian cells in the regulation of various key responses, such as mitogenic growth, differentiation, stress responses, as well as inflammation. This evolutionarily conserved MAP kinase signalling arm is also important for metabolic maintenance, which is tightly coordinated via complicated mechanisms that include the intricate interaction of scaffold proteins, recognition through cognate motifs, action of phosphatases, distinct subcellular localisation, and even post-translational modifications. Aberration in the signalling pathway itself or their regulation has been implicated in the disruption of metabolic homeostasis, which provides a pathophysiological foundation in the development of metabolic syndrome. Metabolic syndrome is an umbrella term that usually includes a group of closely associated metabolic diseases such as hyperglycaemia, hyperlipidaemia, and hypertension. These risk factors exacerbate the development of obesity, diabetes, atherosclerosis, cardiovascular diseases, and hepatic diseases, which have accounted for an increase in the worldwide morbidity and mortality rate. This review aims to summarise recent findings that have implicated MAP kinase signalling in the development of metabolic diseases, highlighting the potential therapeutic targets of this pathway to be investigated further for the attenuation of these diseases.
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Affiliation(s)
- Gavin Yong Quan Ng
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Zachary Wai-Loon Loh
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - David Y. Fann
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
- Healthy Longevity Translational Research Programme, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Karthik Mallilankaraman
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
- Healthy Longevity Translational Research Programme, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Thiruma V. Arumugam
- School of Pharmacy, Sungkyunkwan University, Suwon, Republic of Korea
- Department of Physiology, Anatomy & Microbiology, School of Life Sciences, La Trobe University, Bundoora, Victoria, Australia
| | - M. Prakash Hande
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
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3
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Poirier A, Ormonde JVS, Aubry I, Abidin BM, Feng CH, Martinez-Cordova Z, Hincapie AM, Wu C, Pérez-Quintero LA, Wang CL, Gingras AC, Madrenas J, Tremblay ML. The induction of SHP-1 degradation by TAOK3 ensures the responsiveness of T cells to TCR stimulation. Sci Signal 2024; 17:eadg4422. [PMID: 38166031 DOI: 10.1126/scisignal.adg4422] [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: 12/23/2022] [Accepted: 12/01/2023] [Indexed: 01/04/2024]
Abstract
Thousand-and-one-amino acid kinase 3 (TAOK3) is a serine and threonine kinase that belongs to the STE-20 family of kinases. Its absence reduces T cell receptor (TCR) signaling and increases the interaction of the tyrosine phosphatase SHP-1, a major negative regulator of proximal TCR signaling, with the kinase LCK, a component of the core TCR signaling complex. Here, we used mouse models and human cell lines to investigate the mechanism by which TAOK3 limits the interaction of SHP-1 with LCK. The loss of TAOK3 decreased the survival of naïve CD4+ T cells by dampening the transmission of tonic and ligand-dependent TCR signaling. In mouse T cells, Taok3 promoted the secretion of interleukin-2 (IL-2) in response to TCR activation in a manner that depended on Taok3 gene dosage and on Taok3 kinase activity. TCR desensitization in Taok3-/- T cells was caused by an increased abundance of Shp-1, and pharmacological inhibition of Shp-1 rescued the activation potential of these T cells. TAOK3 phosphorylated threonine-394 in the phosphatase domain of SHP-1, which promoted its ubiquitylation and proteasomal degradation. The loss of TAOK3 had no effect on the abundance of SHP-2, which lacks a residue corresponding to SHP-1 threonine-394. Modulation of SHP-1 abundance by TAOK3 thus serves as a rheostat for TCR signaling and determines the activation threshold of T lymphocytes.
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Affiliation(s)
- Alexandre Poirier
- Goodman Cancer Institute, McGill University, Montréal, H3A 1A3 Québec, Canada
- Faculty of Medicine and Health Sciences, Division of Experimental Medicine, McGill University, Montréal, Québec, Canada
| | - João Vitor Silva Ormonde
- Brazilian Biosciences National Laboratory, Center for Research in Energy and Materials (LNBio - CNPEM), Campinas, São Paulo, Brazil
| | - Isabelle Aubry
- Goodman Cancer Institute, McGill University, Montréal, H3A 1A3 Québec, Canada
- Department of Biochemistry, McGill University, Montréal, Québec, Canada
| | - Belma Melda Abidin
- Goodman Cancer Institute, McGill University, Montréal, H3A 1A3 Québec, Canada
| | - Chu-Han Feng
- Goodman Cancer Institute, McGill University, Montréal, H3A 1A3 Québec, Canada
- Department of Microbiology and Immunology, McGill University, Montréal, Québec, Canada
| | - Zuzet Martinez-Cordova
- Goodman Cancer Institute, McGill University, Montréal, H3A 1A3 Québec, Canada
- Department of Microbiology and Immunology, McGill University, Montréal, Québec, Canada
| | - Ana Maria Hincapie
- Goodman Cancer Institute, McGill University, Montréal, H3A 1A3 Québec, Canada
- Department of Biochemistry, McGill University, Montréal, Québec, Canada
| | - Chenyue Wu
- Department of Microbiology and Immunology, McGill University, Montréal, Québec, Canada
| | | | - Chia-Lin Wang
- NYU Langone Medical Center, 660 1st Ave, Fl 5, New York City, NY 10016, USA
| | - Anne Claude Gingras
- Lunenfeld-Tanenbaum Research Institute, Mount Sinai Hospital, Toronto, Canada
- Department of Molecular Genetics, University of Toronto, Toronto, Canada
| | - Joaquín Madrenas
- Department of Medicine, David Geffen School of Medicine at UCLA, Los Angeles, CA 40095, USA
| | - Michel L Tremblay
- Goodman Cancer Institute, McGill University, Montréal, H3A 1A3 Québec, Canada
- Department of Biochemistry, McGill University, Montréal, Québec, Canada
- Faculty of Medicine, McGill University, Montréal, Québec, Canada
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4
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Tserunyan V, Finley SD. A systems and computational biology perspective on advancing CAR therapy. Semin Cancer Biol 2023; 94:34-49. [PMID: 37263529 PMCID: PMC10529846 DOI: 10.1016/j.semcancer.2023.05.009] [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: 10/11/2022] [Revised: 04/24/2023] [Accepted: 05/28/2023] [Indexed: 06/03/2023]
Abstract
In the recent decades, chimeric antigen receptor (CAR) therapy signaled a new revolutionary approach to cancer treatment. This method seeks to engineer immune cells expressing an artificially designed receptor, which would endue those cells with the ability to recognize and eliminate tumor cells. While some CAR therapies received FDA approval and others are subject to clinical trials, many aspects of their workings remain elusive. Techniques of systems and computational biology have been frequently employed to explain the operating principles of CAR therapy and suggest further design improvements. In this review, we sought to provide a comprehensive account of those efforts. Specifically, we discuss various computational models of CAR therapy ranging in scale from organismal to molecular. Then, we describe the molecular and functional properties of costimulatory domains frequently incorporated in CAR structure. Finally, we describe the signaling cascades by which those costimulatory domains elicit cellular response against the target. We hope that this comprehensive summary of computational and experimental studies will further motivate the use of systems approaches in advancing CAR therapy.
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Affiliation(s)
- Vardges Tserunyan
- Department of Quantitative and Computational Biology, University of Southern California, Los Angeles, CA, USA
| | - Stacey D Finley
- Department of Quantitative and Computational Biology, University of Southern California, Los Angeles, CA, USA; Department of Biomedical Engineering, University of Southern California, Los Angeles, CA, USA; Mork Family Department of Chemical Engineering and Materials Science, University of Southern California, Los Angeles, CA, USA.
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5
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McCallion O, Bilici M, Hester J, Issa F. Regulatory T-cell therapy approaches. Clin Exp Immunol 2023; 211:96-107. [PMID: 35960852 PMCID: PMC10019137 DOI: 10.1093/cei/uxac078] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2022] [Revised: 07/26/2022] [Accepted: 08/10/2022] [Indexed: 11/13/2022] Open
Abstract
Regulatory T cells (Tregs) have enormous therapeutic potential to treat a variety of immunopathologies characterized by aberrant immune activation. Adoptive transfer of ex vivo expanded autologous Tregs continues to progress through mid- to late-phase clinical trials in several disease spaces and has generated promising preliminary safety and efficacy signals to date. However, the practicalities of this strategy outside of the clinical trial setting remain challenging. Here, we review the current landscape of regulatory T-cell therapy, considering emergent approaches and technologies presenting novel ways to engage Tregs, and reflect on the progress necessary to deliver their therapeutic potential to patients.
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Affiliation(s)
- Oliver McCallion
- Translational Research Immunology Group, Nuffield Department of Surgical Sciences, University of Oxford, Oxford, UK
| | - Merve Bilici
- Translational Research Immunology Group, Nuffield Department of Surgical Sciences, University of Oxford, Oxford, UK
| | - Joanna Hester
- Translational Research Immunology Group, Nuffield Department of Surgical Sciences, University of Oxford, Oxford, UK
| | - Fadi Issa
- Correspondence. Fadi Issa, Translational Research Immunology Group, Nuffield Department of Surgical Sciences, University of Oxford, John Radcliffe Hospital, Headley Way, Oxford OX3 9DU, UK.
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6
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Brennan CM, Hill AS, St. Andre M, Li X, Madeti V, Breitkopf S, Garren S, Xue L, Gilbert T, Hadjipanayis A, Monetti M, Emerson CP, Moccia R, Owens J, Christoforou N. DUX4 expression activates JNK and p38 MAP kinases in myoblasts. Dis Model Mech 2022; 15:dmm049516. [PMID: 36196640 PMCID: PMC10655719 DOI: 10.1242/dmm.049516] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2022] [Accepted: 09/28/2022] [Indexed: 11/20/2022] Open
Abstract
Facioscapulohumeral muscular dystrophy (FSHD) is caused by misexpression of the DUX4 transcription factor in skeletal muscle that results in transcriptional alterations, abnormal phenotypes and cell death. To gain insight into the kinetics of DUX4-induced stresses, we activated DUX4 expression in myoblasts and performed longitudinal RNA sequencing paired with proteomics and phosphoproteomics. This analysis revealed changes in cellular physiology upon DUX4 activation, including DNA damage and altered mRNA splicing. Phosphoproteomic analysis uncovered rapid widespread changes in protein phosphorylation following DUX4 induction, indicating that alterations in kinase signaling might play a role in DUX4-mediated stress and cell death. Indeed, we demonstrate that two stress-responsive MAP kinase pathways, JNK and p38, are activated in response to DUX4 expression. Inhibition of each of these pathways ameliorated DUX4-mediated cell death in myoblasts. These findings uncover that the JNK pathway is involved in DUX4-mediated cell death and provide additional insights into the role of the p38 pathway, a clinical target for the treatment of FSHD.
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Affiliation(s)
- Christopher M. Brennan
- Rare Disease Research Unit, Pfizer Inc., Cambridge, MA 02139, USA
- WRDM Postdoctoral Program, Pfizer Inc., Cambridge, MA 02139, USA
| | - Abby S. Hill
- Rare Disease Research Unit, Pfizer Inc., Cambridge, MA 02139, USA
| | | | - Xianfeng Li
- Rare Disease Research Unit, Pfizer Inc., Cambridge, MA 02139, USA
| | - Vijaya Madeti
- NGS Technology Center, Inflammation and Immunology Research Unit, Pfizer, Cambridge, MA 02139, USA
| | - Susanne Breitkopf
- Proteomics Technology Center, Internal Medicine Research Unit, Pfizer, Cambridge, MA 02139, USA
| | - Seth Garren
- NGS Technology Center, Inflammation and Immunology Research Unit, Pfizer, Cambridge, MA 02139, USA
| | - Liang Xue
- Machine Learning and Computational Science, Pfizer Inc., Cambridge, MA 02139, USA
| | - Tamara Gilbert
- High Content Imaging Technology Center, Internal Medicine Research Unit, Pfizer, Cambridge, MA 02139, USA
| | - Angela Hadjipanayis
- NGS Technology Center, Inflammation and Immunology Research Unit, Pfizer, Cambridge, MA 02139, USA
| | - Mara Monetti
- Proteomics Technology Center, Internal Medicine Research Unit, Pfizer, Cambridge, MA 02139, USA
| | - Charles P. Emerson
- Rare Disease Research Unit, Pfizer Inc., Cambridge, MA 02139, USA
- Wellstone Muscular Dystrophy Program, Department of Neurology, University of Massachusetts Medical School, Worcester, MA 01655, USA
| | - Robert Moccia
- Rare Disease Research Unit, Pfizer Inc., Cambridge, MA 02139, USA
| | - Jane Owens
- Rare Disease Research Unit, Pfizer Inc., Cambridge, MA 02139, USA
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7
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Choi JO, Ham JH, Hwang SS. RNA Metabolism in T Lymphocytes. Immune Netw 2022; 22:e39. [PMID: 36381959 PMCID: PMC9634142 DOI: 10.4110/in.2022.22.e39] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2022] [Revised: 08/18/2022] [Accepted: 08/30/2022] [Indexed: 01/25/2023] Open
Abstract
RNA metabolism plays a central role in regulating of T cell-mediated immunity. RNA processing, modifications, and regulations of RNA decay influence the tight and rapid regulation of gene expression during T cell phase transition. Thymic selection, quiescence maintenance, activation, differentiation, and effector functions of T cells are dependent on selective RNA modulations. Recent technical improvements have unveiled the complex crosstalk between RNAs and T cells. Moreover, resting T cells contain large amounts of untranslated mRNAs, implying that the regulation of RNA metabolism might be a key step in controlling gene expression. Considering the immunological significance of T cells for disease treatment, an understanding of RNA metabolism in T cells could provide new directions in harnessing T cells for therapeutic implications.
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Affiliation(s)
- Jin Ouk Choi
- Department of Biochemistry and Molecular Biology, Graduate School of Medical Science, Severance Biomedical Science Institute and Brain Korea 21 Project, Yonsei University College of Medicine, Seoul 03722, Korea
| | - Jeong Hyeon Ham
- Department of Biochemistry and Molecular Biology, Graduate School of Medical Science, Severance Biomedical Science Institute and Brain Korea 21 Project, Yonsei University College of Medicine, Seoul 03722, Korea
| | - Soo Seok Hwang
- Department of Biochemistry and Molecular Biology, Graduate School of Medical Science, Severance Biomedical Science Institute and Brain Korea 21 Project, Yonsei University College of Medicine, Seoul 03722, Korea.,Chronic Intractable Disease Systems Medicine Research Center, Institute of Genetic Science, Institute for Immunology and Immunological Diseases, Yonsei University College of Medicine, Seoul 03722, Korea
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8
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Barley TJ, Murphy PR, Wang X, Bowman BA, Mormol JM, Mager CE, Kirk SG, Cash CJ, Linn SC, Meng X, Nelin LD, Chen B, Hafner M, Zhang J, Liu Y. Mitogen-activated protein kinase phosphatase-1 controls PD-L1 expression by regulating type I interferon during systemic Escherichia coli infection. J Biol Chem 2022; 298:101938. [PMID: 35429501 PMCID: PMC9108994 DOI: 10.1016/j.jbc.2022.101938] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Revised: 03/21/2022] [Accepted: 04/06/2022] [Indexed: 11/24/2022] Open
Abstract
Mitogen-activated protein kinase phosphatase 1 (Mkp-1) KO mice produce elevated cytokines and exhibit increased mortality and bacterial burden following systemic Escherichia coli infection. To understand how Mkp-1 affects immune defense, we analyzed the RNA-Seq datasets previously generated from control and E. coli-infected Mkp-1+/+ and Mkp-1-/- mice. We found that E. coli infection markedly induced programmed death-ligand 1 (PD-L1) expression and that Mkp-1 deficiency further amplified PD-L1 expression. Administration of a PD-L1-neutralizing monoclonal antibody (mAb) to Mkp-1-/- mice increased the mortality of the animals following E. coli infection, although bacterial burden was decreased. In addition, the PD-L1-neutralizing mAb increased serum interferon (IFN)-γ and tumor necrosis factor alpha, as well as lung- and liver-inducible nitric oxide synthase levels, suggesting an enhanced inflammatory response. Interestingly, neutralization of IFN-α/β receptor 1 blocked PD-L1 induction in Mkp-1-/- mice following E. coli infection. PD-L1 was potently induced in macrophages by E. coli and lipopolysaccharide in vitro, and Mkp-1 deficiency exacerbated PD-L1 induction with little effect on the half-life of PD-L1 mRNA. In contrast, inhibitors of Janus kinase 1/2 and tyrosine kinase 2, as well as the IFN-α/β receptor 1-neutralizing mAb, markedly attenuated PD-L1 induction. These results suggest that the beneficial effect of type I IFNs in E. coli-infected Mkp-1-/- mice is, at least in part, mediated by Janus kinase/signal transducer and activator of transcription-driven PD-L1 induction. Our studies also support the notion that enhanced PD-L1 expression contributes to the bactericidal defect of Mkp-1-/- mice.
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Affiliation(s)
- Timothy J Barley
- Center for Perinatal Research, The Abigail Wexner Research Institute at Nationwide Children's Hospital, Columbus, Ohio, USA
| | - Parker R Murphy
- Center for Perinatal Research, The Abigail Wexner Research Institute at Nationwide Children's Hospital, Columbus, Ohio, USA
| | - Xiantao Wang
- Laboratory of Muscle Stem Cells and Gene Regulation, National Institute of Arthritis and Musculoskeletal and Skin Disease, National Institutes of Health, Bethesda, Maryland, USA
| | - Bridget A Bowman
- Center for Perinatal Research, The Abigail Wexner Research Institute at Nationwide Children's Hospital, Columbus, Ohio, USA
| | - Justin M Mormol
- Center for Perinatal Research, The Abigail Wexner Research Institute at Nationwide Children's Hospital, Columbus, Ohio, USA
| | - Carli E Mager
- Center for Perinatal Research, The Abigail Wexner Research Institute at Nationwide Children's Hospital, Columbus, Ohio, USA
| | - Sean G Kirk
- Center for Perinatal Research, The Abigail Wexner Research Institute at Nationwide Children's Hospital, Columbus, Ohio, USA
| | - Charles J Cash
- Center for Perinatal Research, The Abigail Wexner Research Institute at Nationwide Children's Hospital, Columbus, Ohio, USA
| | - Sarah C Linn
- Combined Anatomic Pathology Residency/Graduate Program, Department of Veterinary Biosciences, The Ohio State University College of Veterinary Medicine, Columbus, Ohio, USA; Kidney and Urinary Tract Center, The Abigail Wexner Research Institute at Nationwide Children's Hospital, Columbus, Ohio, USA
| | - Xiaomei Meng
- Center for Perinatal Research, The Abigail Wexner Research Institute at Nationwide Children's Hospital, Columbus, Ohio, USA
| | - Leif D Nelin
- Center for Perinatal Research, The Abigail Wexner Research Institute at Nationwide Children's Hospital, Columbus, Ohio, USA; Department of Pediatrics, The Ohio State University College of Medicine, Columbus, Ohio, USA
| | - Bernadette Chen
- Center for Perinatal Research, The Abigail Wexner Research Institute at Nationwide Children's Hospital, Columbus, Ohio, USA; Department of Pediatrics, The Ohio State University College of Medicine, Columbus, Ohio, USA
| | - Markus Hafner
- Laboratory of Muscle Stem Cells and Gene Regulation, National Institute of Arthritis and Musculoskeletal and Skin Disease, National Institutes of Health, Bethesda, Maryland, USA
| | - Jian Zhang
- Department of Pathology, University of Iowa Carver College of Medicine, Iowa City, Iowa, USA
| | - Yusen Liu
- Center for Perinatal Research, The Abigail Wexner Research Institute at Nationwide Children's Hospital, Columbus, Ohio, USA; Department of Pediatrics, The Ohio State University College of Medicine, Columbus, Ohio, USA.
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9
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Anti-Inflammatory Extract from Soil Algae Chromochloris zofingiensis Targeting TNFR/NF-κB Signaling at Different Levels. Cells 2022; 11:cells11091407. [PMID: 35563717 PMCID: PMC9101025 DOI: 10.3390/cells11091407] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Revised: 04/12/2022] [Accepted: 04/19/2022] [Indexed: 01/27/2023] Open
Abstract
Inflammatory skin diseases, including atopic dermatitis (AD) and psoriasis, are increasing in populations worldwide. The treatment of patients with AD and other forms of skin inflammation is mainly based on the use of topical corticosteroids or calcineurin inhibitors, which can cause significant side effects with long-term use. Therefore, there is a great need for the development of more effective and less toxic anti-inflammatory agents suitable for the treatment of chronic skin lesions. Here, we screened a number of strains from the ASIB 505 terrestrial algae collection and identified a green algae Chromochloris zofingiensis with pronounced anti-inflammatory properties. We found that a crude nonpolar extract of C. zofingiensis (ID name NAE_2022C), grown upon nitrogen deprivation, acts as a bioactive substance by inhibiting TNFR/NF-κB responses in human skin keratinocyte HaCaT cells. We also found that NAE_2022C suppressed the secretion of pro-inflammatory cytokine tumor necrosis factor α (TNFα) and several Th1- and Th2-related chemokines in a reconstituted human epidermis. The TNFR/NF-κB pathway analysis showed multiple inhibitory effects at different levels and disclosed a direct targeting of IKKβ by the extract. Bioassay-guided fractionation followed by high-resolution mass spectrometry detected diacylglyceryl-trimethylhomoserine (DGTS), Lyso-DGTS (LDGTS), 5-phenylvaleric acid, theophylline and oleamide as leading metabolites in the active fraction of NAE_2022C. Further analysis identified betaine lipid DGTS (32:0) as one of the active compounds responsible for the NAE_2022C-mediated NF-κB suppression. Overall, this study presents an approach for the isolation, screening, and identification of anti-inflammatory secondary metabolites produced by soil algae.
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10
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Heinen T, Xie C, Keshavarz M, Stappert D, Künzel S, Tautz D. Evolution of a New Testis-Specific Functional Promoter Within the Highly Conserved Map2k7 Gene of the Mouse. Front Genet 2022; 12:812139. [PMID: 35069705 PMCID: PMC8766832 DOI: 10.3389/fgene.2021.812139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Accepted: 12/08/2021] [Indexed: 12/03/2022] Open
Abstract
Map2k7 (synonym Mkk7) is a conserved regulatory kinase gene and a central component of the JNK signaling cascade with key functions during cellular differentiation. It shows complex transcription patterns, and different transcript isoforms are known in the mouse (Mus musculus). We have previously identified a newly evolved testis-specific transcript for the Map2k7 gene in the subspecies M. m. domesticus. Here, we identify the new promoter that drives this transcript and find that it codes for an open reading frame (ORF) of 50 amino acids. The new promoter was gained in the stem lineage of closely related mouse species but was secondarily lost in the subspecies M. m. musculus and M. m. castaneus. A single mutation can be correlated with its transcriptional activity in M. m. domesticus, and cell culture assays demonstrate the capability of this mutation to drive expression. A mouse knockout line in which the promoter region of the new transcript is deleted reveals a functional contribution of the newly evolved promoter to sperm motility and the spermatid transcriptome. Our data show that a new functional transcript (and possibly protein) can evolve within an otherwise highly conserved gene, supporting the notion of regulatory changes contributing to the emergence of evolutionary novelties.
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Affiliation(s)
| | - Chen Xie
- Max-Plank Institute for Evolutionary Biology, Plön, Germany
| | - Maryam Keshavarz
- Max-Plank Institute for Evolutionary Biology, Plön, Germany.,Deutsches Zentrum für Neurodegenerative Erkrankungen e. V. (DZNE), Bonn, Germany
| | - Dominik Stappert
- Deutsches Zentrum für Neurodegenerative Erkrankungen e. V. (DZNE), Bonn, Germany
| | - Sven Künzel
- Max-Plank Institute for Evolutionary Biology, Plön, Germany
| | - Diethard Tautz
- Max-Plank Institute for Evolutionary Biology, Plön, Germany
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11
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Molecular Mechanisms Leading from Periodontal Disease to Cancer. Int J Mol Sci 2022; 23:ijms23020970. [PMID: 35055157 PMCID: PMC8778447 DOI: 10.3390/ijms23020970] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2021] [Revised: 01/07/2022] [Accepted: 01/14/2022] [Indexed: 12/12/2022] Open
Abstract
Periodontitis is prevalent in half of the adult population and raises critical health concerns as it has been recently associated with an increased risk of cancer. While information about the topic remains somewhat scarce, a deeper understanding of the underlying mechanistic pathways promoting neoplasia in periodontitis patients is of fundamental importance. This manuscript presents the literature as well as a panel of tables and figures on the molecular mechanisms of Porphyromonas gingivalis and Fusobacterium nucleatum, two main oral pathogens in periodontitis pathology, involved in instigating tumorigenesis. We also present evidence for potential links between the RANKL–RANK signaling axis as well as circulating cytokines/leukocytes and carcinogenesis. Due to the nonconclusive data associating periodontitis and cancer reported in the case and cohort studies, we examine clinical trials relevant to the topic and summarize their outcome.
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12
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Preston SP, Doerflinger M, Scott HW, Allison CC, Horton M, Cooney J, Pellegrini M. The role of MKK4 in T-cell development and immunity to viral infections. Immunol Cell Biol 2020; 99:428-435. [PMID: 33175451 PMCID: PMC8247422 DOI: 10.1111/imcb.12426] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2019] [Revised: 11/03/2020] [Accepted: 11/10/2020] [Indexed: 11/28/2022]
Abstract
The stress-activated protein kinases (SAPKs)/c-Jun-N-terminal-kinases (JNK) are members of the mitogen-activated protein kinase family. These kinases are responsible for transducing cellular signals through a phosphorylation-dependent signaling cascade. JNK activation in immune cells can lead to a range of critical cellular responses that include proliferation, differentiation and apoptosis. MKK4 is a SAPK that can activate both JNK1 and JNK2; however, its role in T-cell development and function has been controversial. Additionally, loss of either JNK1 or JNK2 has opposing effects in the generation of T-cell immunity to viral infection and cancer. We used mice with a conditional loss of MKK4 in T cells to investigate the in vivo role of MKK4 in T-cell development and function during lymphocytic choriomeningitis virus (LCMV) infection. We found no physiologically relevant differences in T-cell responses or immunity to either acute or chronic LCMV in the absence of MKK4.
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Affiliation(s)
- Simon P Preston
- Walter and Eliza Hall Institute of Medical Research, Parkville, VIC, Australia.,Department of Medical Biology, The University of Melbourne, Parkville, VIC, Australia
| | - Marcel Doerflinger
- Walter and Eliza Hall Institute of Medical Research, Parkville, VIC, Australia.,Department of Medical Biology, The University of Melbourne, Parkville, VIC, Australia
| | - Hamish W Scott
- Walter and Eliza Hall Institute of Medical Research, Parkville, VIC, Australia
| | - Cody C Allison
- Walter and Eliza Hall Institute of Medical Research, Parkville, VIC, Australia.,Department of Medical Biology, The University of Melbourne, Parkville, VIC, Australia
| | - Miles Horton
- Walter and Eliza Hall Institute of Medical Research, Parkville, VIC, Australia.,Department of Medical Biology, The University of Melbourne, Parkville, VIC, Australia
| | - James Cooney
- Walter and Eliza Hall Institute of Medical Research, Parkville, VIC, Australia.,Department of Medical Biology, The University of Melbourne, Parkville, VIC, Australia
| | - Marc Pellegrini
- Walter and Eliza Hall Institute of Medical Research, Parkville, VIC, Australia.,Department of Medical Biology, The University of Melbourne, Parkville, VIC, Australia
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13
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Vind AC, Genzor AV, Bekker-Jensen S. Ribosomal stress-surveillance: three pathways is a magic number. Nucleic Acids Res 2020; 48:10648-10661. [PMID: 32941609 PMCID: PMC7641731 DOI: 10.1093/nar/gkaa757] [Citation(s) in RCA: 71] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Revised: 08/28/2020] [Accepted: 09/06/2020] [Indexed: 12/15/2022] Open
Abstract
Cells rely on stress response pathways to uphold cellular homeostasis and limit the negative effects of harmful environmental stimuli. The stress- and mitogen-activated protein (MAP) kinases, p38 and JNK, are at the nexus of numerous stress responses, among these the ribotoxic stress response (RSR). Ribosomal impairment is detrimental to cell function as it disrupts protein synthesis, increase inflammatory signaling and, if unresolved, lead to cell death. In this review, we offer a general overview of the three main translation surveillance pathways; the RSR, Ribosome-associated Quality Control (RQC) and the Integrated Stress Response (ISR). We highlight recent advances made in defining activation mechanisms for these pathways and discuss their commonalities and differences. Finally, we reflect on the physiological role of the RSR and consider the therapeutic potential of targeting the sensing kinase ZAKα for treatment of ribotoxin exposure.
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Affiliation(s)
- Anna Constance Vind
- Center for Healthy Aging, Department of Cellular and Molecular Medicine, University of Copenhagen, Blegdamsvej 3B, DK-2200 Copenhagen, Denmark
| | - Aitana Victoria Genzor
- Center for Healthy Aging, Department of Cellular and Molecular Medicine, University of Copenhagen, Blegdamsvej 3B, DK-2200 Copenhagen, Denmark
| | - Simon Bekker-Jensen
- Center for Healthy Aging, Department of Cellular and Molecular Medicine, University of Copenhagen, Blegdamsvej 3B, DK-2200 Copenhagen, Denmark
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14
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Kumar S, Singh SK, Viswakarma N, Sondarva G, Nair RS, Sethupathi P, Dorman M, Sinha SC, Hoskins K, Thatcher G, Rana B, Rana A. Rationalized inhibition of mixed lineage kinase 3 and CD70 enhances life span and antitumor efficacy of CD8 + T cells. J Immunother Cancer 2020; 8:e000494. [PMID: 32759234 PMCID: PMC7410077 DOI: 10.1136/jitc-2019-000494] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/03/2020] [Indexed: 02/04/2023] Open
Abstract
BACKGROUND The mitogen-activated protein kinases (MAPKs) are important for T cell survival and their effector function. Mixed lineage kinase 3 (MLK3) (MAP3K11) is an upstream regulator of MAP kinases and emerging as a potential candidate for targeted cancer therapy; yet, its role in T cell survival and effector function is not known. METHODS T cell phenotypes, apoptosis and intracellular cytokine expressions were analyzed by flow cytometry. The apoptosis-associated gene expressions in CD8+CD38+ T cells were measured using RT2 PCR array. In vivo effect of combined blockade of MLK3 and CD70 was analyzed in 4T1 tumor model in immunocompetent mice. The serum level of tumor necrosis factor-α (TNFα) was quantified by enzyme-linked immunosorbent assay. RESULTS We report that genetic loss or pharmacological inhibition of MLK3 induces CD70-TNFα-TNFRSF1a axis-mediated apoptosis in CD8+ T cells. The genetic loss of MLK3 decreases CD8+ T cell population, whereas CD4+ T cells are partially increased under basal condition. Moreover, the loss of MLK3 induces CD70-mediated apoptosis in CD8+ T cells but not in CD4+ T cells. Among the activated CD8+ T cell phenotypes, CD8+CD38+ T cell population shows more than five fold increase in apoptosis due to loss of MLK3, and the expression of TNFRSF1a is significantly higher in CD8+CD38+ T cells. In addition, we observed that CD70 is an upstream regulator of TNFα-TNFRSF1a axis and necessary for induction of apoptosis in CD8+ T cells. Importantly, blockade of CD70 attenuates apoptosis and enhances effector function of CD8+ T cells from MLK3-/- mice. In immune-competent breast cancer mouse model, pharmacological inhibition of MLK3 along with CD70 increased tumor infiltration of cytotoxic CD8+ T cells, leading to reduction in tumor burden largely via mitochondrial apoptosis. CONCLUSION Together, these results demonstrate that MLK3 plays an important role in CD8+ T cell survival and effector function and MLK3-CD70 axis could serve as a potential target in cancer.
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Affiliation(s)
- Sandeep Kumar
- Surgery, University of Illinois at Chicago, Chicago, Illinois, USA
| | | | - Navin Viswakarma
- Surgery, University of Illinois at Chicago, Chicago, Illinois, USA
| | - Gautam Sondarva
- Surgery, University of Illinois at Chicago, Chicago, Illinois, USA
| | | | | | - Matthew Dorman
- Surgery, University of Illinois at Chicago, Chicago, Illinois, USA
| | | | - Kent Hoskins
- Division of Hematology/Oncology, College of Medicine, University of Illinois at Chicago, Chicago, Illinois, USA
| | - Gregory Thatcher
- Department of Medicinal Chemistry and Pharmacognosy, University of Illinois at Chicago, Chicago, Illinois, USA
| | - Basabi Rana
- Surgery, University of Illinois at Chicago, Chicago, Illinois, USA
- University of Illinois Hospital & Health Sciences System Cancer Center, Chicago, Illinois, USA
- Jesse Brown VA Medical Center, Chicago, Illinois, USA
| | - Ajay Rana
- Surgery, University of Illinois at Chicago, Chicago, Illinois, USA
- University of Illinois Hospital & Health Sciences System Cancer Center, Chicago, Illinois, USA
- Jesse Brown VA Medical Center, Chicago, Illinois, USA
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15
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Role of different Th17 and Treg downstream signalling pathways in the pathogenesis of Staphylococcus aureus infection induced septic arthritis in mice. Exp Mol Pathol 2020; 116:104485. [PMID: 32574668 DOI: 10.1016/j.yexmp.2020.104485] [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] [Received: 04/26/2020] [Revised: 05/18/2020] [Accepted: 06/17/2020] [Indexed: 12/15/2022]
Abstract
Septic arthritis is a condition of bone disorder caused predominantly by Staphylococcus aureus. Following the bacterial entry activated immune cells specially macrophages and dendritic cells release pro-inflammatory mediators such as IL-6, TNF-α, IL-1β etc., which not only create an inflammatory microenvironment but also play crucial roles in the proliferation of different CD+ T cell subsets. Among them, Th17 and Tregs are of major concern in recent times because of their potential roles in regulating the ongoing inflammation in many diseases including experimental arthritis. But the downstream signalling mechanism of these cells in regulating the severity of inflammation in case of septic arthritis is not known yet. So, here we have established a murine model of S. aureus induced septic arthritis and kept the animal upto 15 days post-infection. To examine the signalling mechanism, Th17 and Treg cells were isolated from blood, spleen and synovial joints of control and infected mice and observed the expression of JNK, NFκB and RANKL in the lysate of isolated Th17 and Tregs. We have also estimated the levels of serum IL-21 and TGF-β. NFκB, JNK and RANKL expression was found to be higher at 3 and 15 days post-infection along with serum IL-21 levels. On the other hand, maximum TGF-β level was observed at 9 days post-infection along with increased Treg population. In conclusion it was hypothesized that bone resorption is related with downstream signalling pathways of Th17 cells, which stimulate osteoclast generation via NFκB/JNK-RANKL axis and helps in the persistence of the disease.
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16
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Haddadi MH, Negahdari B, Hajizadeh-Saffar E, Khosravi-Maharlooei M, Basiri M, Dabiri H, Baharvand H. Directed differentiation of regulatory T cells from naive T cells and prevention of their inflammation-mediated instability using small molecules. Clin Exp Immunol 2020; 201:205-221. [PMID: 32403163 DOI: 10.1111/cei.13453] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2019] [Revised: 05/05/2020] [Accepted: 05/05/2020] [Indexed: 12/29/2022] Open
Abstract
Regulatory T (Treg ) cell therapy is a promising approach for immune tolerance induction in autoimmunity conditions and cell/organ transplantations. Insufficient isolation yields and impurity during downstream processes and Treg instability after adoptive transfer in inflammatory conditions are major limitations to Treg therapy, and indicate the importance of seeking a valid, reliable method for de-novo generation of Tregs . In this research, we evaluated Treg -like cells obtained from different Treg differentiation protocols in terms of their yield, purity and activity. Differentiation was performed on naive CD4+ cells and a naive CD4+ /Treg co-culture by using three different protocols - ectopic expression of forkhead box protein P3 (E-FoxP3), soluble transforming growth factor β (S-TGF) and small molecules [N-acetyl puromycin and SR1555 (N-Ac/SR)]. The results showed that a high yield of a homogeneous population of Treg -like cells could be achieved by the N-Ac/SR method under a T helper type 17 (Th17)-polarizing condition, particularly interleukin (IL)-6 and TGF-β, when compared with the E-FoxP3 and S-TGF methods. Surprisingly, SR completely inhibited the differentiation of IL-17-producing cells and facilitated Treg generation in the inflammatory condition and had highly suppressive activity against T cell proliferation without Treg -specific demethylase region (TSDR) demethylation. For the first time, to our knowledge, we report the generation of efficient, pure Treg -like cells by using small molecules during in-vitro inflammatory conditions. Our results suggested that the N-Ac/SR method has several advantages for Treg generation when compared with the other methods, including a higher purity of Tregs , easier procedure, superior suppressive activity during the inflammatory condition and decreased cost.
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Affiliation(s)
- M-H Haddadi
- Department of Medical Biotechnology, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran.,Clinical Microbiology Research Center, Ilam University of Medical Sciences, Ilam, Iran
| | - B Negahdari
- Department of Medical Biotechnology, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - E Hajizadeh-Saffar
- Department of Regenerative Medicine, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran
| | - M Khosravi-Maharlooei
- Columbia Center for Translational Immunology, Department of Medicine, Columbia University College of Physicians and Surgeons, New York, NY, USA
| | - M Basiri
- Department of Stem Cells and Developmental Biology, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran
| | - H Dabiri
- Department of Regenerative Medicine, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran
| | - H Baharvand
- Department of Stem Cells and Developmental Biology, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran.,Department of Developmental Biology, University of Science and Culture, Tehran, Iran
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17
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Semba T, Sammons R, Wang X, Xie X, Dalby KN, Ueno NT. JNK Signaling in Stem Cell Self-Renewal and Differentiation. Int J Mol Sci 2020; 21:E2613. [PMID: 32283767 PMCID: PMC7177258 DOI: 10.3390/ijms21072613] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2020] [Revised: 04/07/2020] [Accepted: 04/07/2020] [Indexed: 12/13/2022] Open
Abstract
C-JUN N-terminal kinases (JNKs), which belong to the mitogen-activated protein kinase (MAPK) family, are evolutionarily conserved kinases that mediate cell responses to various types of extracellular stress insults. They regulate physiological processes such as embryonic development and tissue regeneration, playing roles in cell proliferation and programmed cell death. JNK signaling is also involved in tumorigenesis and progression of several types of malignancies. Recent studies have shown that JNK signaling has crucial roles in regulating the traits of cancer stem cells (CSCs). Here we describe the functions of the JNK signaling pathway in self-renewal and differentiation, which are essential features of various types of stem cells, such as embryonic, induced pluripotent, and adult tissue-specific stem cells. We also review current knowledge of JNK signaling in CSCs and discuss its role in maintaining the CSC phenotype. A better understanding of JNK signaling as an essential regulator of stemness may provide a basis for the development of regenerative medicine and new therapeutic strategies against malignant tumors.
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Affiliation(s)
- Takashi Semba
- Section of Translational Breast Cancer Research, Department of Breast Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA; (T.S.); (X.W.); (X.X.)
- Morgan Welch Inflammatory Breast Cancer Research Program and Clinic, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Rachel Sammons
- Division of Chemical Biology and Medicinal Chemistry, College of Pharmacy, The University of Texas at Austin, Austin, TX 78712, USA; (R.S.); (K.N.D.)
| | - Xiaoping Wang
- Section of Translational Breast Cancer Research, Department of Breast Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA; (T.S.); (X.W.); (X.X.)
- Morgan Welch Inflammatory Breast Cancer Research Program and Clinic, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Xuemei Xie
- Section of Translational Breast Cancer Research, Department of Breast Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA; (T.S.); (X.W.); (X.X.)
- Morgan Welch Inflammatory Breast Cancer Research Program and Clinic, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Kevin N. Dalby
- Division of Chemical Biology and Medicinal Chemistry, College of Pharmacy, The University of Texas at Austin, Austin, TX 78712, USA; (R.S.); (K.N.D.)
- Department of Oncology, Dell Medical School, The University of Texas at Austin, Austin, TX 78712, USA
| | - Naoto T. Ueno
- Section of Translational Breast Cancer Research, Department of Breast Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA; (T.S.); (X.W.); (X.X.)
- Morgan Welch Inflammatory Breast Cancer Research Program and Clinic, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
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18
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Kumar S, Singh SK, Viswakarma N, Sondarva G, Nair RS, Sethupathi P, Sinha SC, Emmadi R, Hoskins K, Danciu O, Thatcher GRJ, Rana B, Rana A. Mixed lineage kinase 3 inhibition induces T cell activation and cytotoxicity. Proc Natl Acad Sci U S A 2020; 117:7961-7970. [PMID: 32209667 PMCID: PMC7149389 DOI: 10.1073/pnas.1921325117] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Mixed lineage kinase 3 (MLK3), also known as MAP3K11, was initially identified in a megakaryocytic cell line and is an emerging therapeutic target in cancer, yet its role in immune cells is not known. Here, we report that loss or pharmacological inhibition of MLK3 promotes activation and cytotoxicity of T cells. MLK3 is abundantly expressed in T cells, and its loss alters serum chemokines, cytokines, and CD28 protein expression on T cells and its subsets. MLK3 loss or pharmacological inhibition induces activation of T cells in in vitro, ex vivo, and in vivo conditions, irrespective of T cell activating agents. Conversely, overexpression of MLK3 decreases T cell activation. Mechanistically, loss or inhibition of MLK3 down-regulates expression of a prolyl-isomerase, Ppia, which is directly phosphorylated by MLK3 to increase its isomerase activity. Moreover, MLK3 also phosphorylates nuclear factor of activated T cells 1 (NFATc1) and regulates its nuclear translocation via interaction with Ppia, and this regulates T cell effector function. In an immune-competent mouse model of breast cancer, MLK3 inhibitor increases Granzyme B-positive CD8+ T cells and decreases MLK3 and Ppia gene expression in tumor-infiltrating T cells. Likewise, the MLK3 inhibitor in pan T cells, isolated from breast cancer patients, also increases cytotoxic CD8+ T cells. These results collectively demonstrate that MLK3 plays an important role in T cell biology, and targeting MLK3 could serve as a potential therapeutic intervention via increasing T cell cytotoxicity in cancer.
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MESH Headings
- Animals
- Breast Neoplasms/blood
- Breast Neoplasms/drug therapy
- Breast Neoplasms/immunology
- Breast Neoplasms/pathology
- Cell Line, Tumor/transplantation
- Cyclophilin A/metabolism
- Female
- Humans
- Lymphocyte Activation/drug effects
- Lymphocytes, Tumor-Infiltrating/drug effects
- Lymphocytes, Tumor-Infiltrating/immunology
- Lymphocytes, Tumor-Infiltrating/metabolism
- MAP Kinase Kinase Kinases/antagonists & inhibitors
- MAP Kinase Kinase Kinases/genetics
- MAP Kinase Kinase Kinases/metabolism
- Mammary Neoplasms, Experimental/blood
- Mammary Neoplasms, Experimental/immunology
- Mammary Neoplasms, Experimental/pathology
- Mice
- NFATC Transcription Factors/metabolism
- Phosphorylation/drug effects
- Phosphorylation/immunology
- Primary Cell Culture
- Protein Kinase Inhibitors/pharmacology
- Protein Kinase Inhibitors/therapeutic use
- Pyridines/pharmacology
- Pyridines/therapeutic use
- Pyrroles/pharmacology
- Pyrroles/therapeutic use
- T-Lymphocytes, Cytotoxic/drug effects
- T-Lymphocytes, Cytotoxic/immunology
- T-Lymphocytes, Cytotoxic/metabolism
- Tumor Escape/drug effects
- Mitogen-Activated Protein Kinase Kinase Kinase 11
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Affiliation(s)
- Sandeep Kumar
- Department of Surgery, Division of Surgical Oncology, University of Illinois at Chicago, Chicago, IL 60612
| | - Sunil Kumar Singh
- Department of Surgery, Division of Surgical Oncology, University of Illinois at Chicago, Chicago, IL 60612
| | - Navin Viswakarma
- Department of Surgery, Division of Surgical Oncology, University of Illinois at Chicago, Chicago, IL 60612
| | - Gautam Sondarva
- Department of Surgery, Division of Surgical Oncology, University of Illinois at Chicago, Chicago, IL 60612
| | - Rakesh Sathish Nair
- Department of Surgery, Division of Surgical Oncology, University of Illinois at Chicago, Chicago, IL 60612
| | - Periannan Sethupathi
- Department of Surgery, Division of Surgical Oncology, University of Illinois at Chicago, Chicago, IL 60612
| | - Subhash C Sinha
- Laboratory of Molecular and Cellular Neuroscience, The Rockefeller University, New York, NY 10065
| | - Rajyasree Emmadi
- Department of Pathology, College of Medicine, University of Illinois at Chicago, Chicago, IL 60612
| | - Kent Hoskins
- Division of Hematology/Oncology, College of Medicine, University of Illinois at Chicago, Chicago, IL 60612
| | - Oana Danciu
- Division of Hematology/Oncology, College of Medicine, University of Illinois at Chicago, Chicago, IL 60612
| | - Gregory R J Thatcher
- Department of Medicinal Chemistry and Pharmacognosy, University of Illinois at Chicago, Chicago, IL 60612
| | - Basabi Rana
- Department of Surgery, Division of Surgical Oncology, University of Illinois at Chicago, Chicago, IL 60612
- University of Illinois Hospital and Health Sciences System Cancer Center, University of Illinois at Chicago, Chicago, IL 60612
- Research Unit, Jesse Brown VA Medical Center, Chicago, IL 60612
| | - Ajay Rana
- Department of Surgery, Division of Surgical Oncology, University of Illinois at Chicago, Chicago, IL 60612;
- University of Illinois Hospital and Health Sciences System Cancer Center, University of Illinois at Chicago, Chicago, IL 60612
- Research Unit, Jesse Brown VA Medical Center, Chicago, IL 60612
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19
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Identification and functional analysis of specific MS risk miRNAs and their target genes. Mult Scler Relat Disord 2020; 41:102044. [PMID: 32179484 DOI: 10.1016/j.msard.2020.102044] [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] [Received: 12/29/2019] [Revised: 02/24/2020] [Accepted: 03/04/2020] [Indexed: 11/20/2022]
Abstract
BACKGROUND It has been widely acknowledged that abnormal expression of microRNAs (miRNAs) may lead to the occurrence and development of MS through regulating target genes. Currently, only few studies have comprehensively evaluated the function and relationship between MS-related miRNAs and their target genes. METHODS Differentially expressed miRNAs in MS patients' serum and plasma were selected by reviewing numerous literatures manually. Then, thousands of target genes were screened by several online databases, of which 899 MS-related genes were further identified. Gene ontology, protein-protein interaction and KEGG pathway analysis were used to determine high-risk pathways and MS risk genes. Transcriptomic datasets from GEO was analyzed to evaluate these risk genes. RESULTS 28 MS-related miRNAs were extracted. MiR-30e, miR-93, miR-155 were identified as the most crucial miRNAs through targeting hub genes: PIK3CA, PIK3R1, PIK3R2 and MAPK8. Seven immune pathways were screened out according to KEGG pathway analysis. Six transcriptomic datasets were used to evaluate results, and PIK3CA was differentially expressed in MS patients compared with healthy donors. CONCLUSIONS According to our research, MS-related miRNAs and their target genes of MS were identified and comprehensively evaluated. This work may provide a new insight for discovering pathogenesis and possible biomarkers of MS in future studies.
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20
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Kirk SG, Samavati L, Liu Y. MAP kinase phosphatase-1, a gatekeeper of the acute innate immune response. Life Sci 2020; 241:117157. [PMID: 31837332 PMCID: PMC7480273 DOI: 10.1016/j.lfs.2019.117157] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2019] [Revised: 12/05/2019] [Accepted: 12/09/2019] [Indexed: 02/08/2023]
Abstract
Mitogen-activated protein kinase (MAPK)§ cascades are crucial signaling pathways in the regulation of the host immune response to infection. MAPK phosphatase (MKP)-1, an archetypal member of the MKP family, plays a pivotal role in the down-regulation of p38 and JNK. Studies using cultured macrophages have demonstrated a pivotal role of MKP-1 in the restraint of the biosynthesis of both pro-inflammatory and anti-inflammatory cytokines as well as chemokines. Using MKP-1 knockout mice, several groups have not only confirmed the critical importance of MKP-1 in the regulation of the cytokine synthesis in vivo during the acute host response to bacterial infections, but also revealed novel functions of MKP-1 in maintaining bactericidal functions and host metabolic activities. RNA-seq analyses on livers of septic mice infected with E. coli have revealed that MKP-1 deficiency caused substantial perturbation in the expression of over 5000 genes, an impressive >20% of the entire murine genome. Among the genes whose expression are dramatically affected by MKP-1 deficiency are those encoding metabolic regulators and acute phase response proteins. These studies demonstrate that MKP-1 is an essential gate-keeper of the acute innate immune response, facilitating pathogen killing and regulating the metabolic response during pathogenic infection. In this review article, we will summarize the studies on the function of MKP-1 during acute innate immune response in the regulation of inflammation, metabolism, and acute phase response. We will also discuss the role of MKP-1 in the actions of numerous immunomodulatory agents.
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Affiliation(s)
- Sean G. Kirk
- Center for Perinatal Research, The Abigail Wexner Research Institute at Nationwide Children’s Hospital, Columbus, OH 43215, USA
| | - Lobelia Samavati
- Center for Molecular Medicine and Genetics, Wayne State University School of Medicine, Detroit, MI 48201, USA
| | - Yusen Liu
- Center for Perinatal Research, The Abigail Wexner Research Institute at Nationwide Children’s Hospital, Columbus, OH 43215, USA,Department of Pediatrics, The Ohio State University College of Medicine, Columbus, OH 43205, USA,Corresponding author at: Center for Perinatal Research The Abigail Wexner Research Institute at Nationwide Children’s Hospital, 575 Children’s Cross Road, Columbus, OH 43215, USA. (Y. Liu)
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21
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Kumar S, Principe DR, Singh SK, Viswakarma N, Sondarva G, Rana B, Rana A. Mitogen-Activated Protein Kinase Inhibitors and T-Cell-Dependent Immunotherapy in Cancer. Pharmaceuticals (Basel) 2020; 13:E9. [PMID: 31936067 PMCID: PMC7168889 DOI: 10.3390/ph13010009] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2019] [Revised: 01/02/2020] [Accepted: 01/04/2020] [Indexed: 12/13/2022] Open
Abstract
Mitogen-activated protein kinase (MAPK) signaling networks serve to regulate a wide range of physiologic and cancer-associated cell processes. For instance, a variety of oncogenic mutations often lead to hyperactivation of MAPK signaling, thereby enhancing tumor cell proliferation and disease progression. As such, several components of the MAPK signaling network have been proposed as viable targets for cancer therapy. However, the contributions of MAPK signaling extend well beyond the tumor cells, and several MAPK effectors have been identified as key mediators of the tumor microenvironment (TME), particularly with respect to the local immune infiltrate. In fact, a blockade of various MAPK signals has been suggested to fundamentally alter the interaction between tumor cells and T lymphocytes and have been suggested a potential adjuvant to immune checkpoint inhibition in the clinic. Therefore, in this review article, we discuss the various mechanisms through which MAPK family members contribute to T-cell biology, as well as circumstances in which MAPK inhibition may potentiate or limit cancer immunotherapy.
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Affiliation(s)
- Sandeep Kumar
- Department of Surgery, Division of Surgical Oncology, University of Illinois at Chicago, IL 60612, USA; (S.K.); (D.R.P.); (S.K.S.); (N.V.); (G.S.); (B.R.)
- Jesse Brown VA Medical Center, Chicago, IL 60612, USA
| | - Daniel R. Principe
- Department of Surgery, Division of Surgical Oncology, University of Illinois at Chicago, IL 60612, USA; (S.K.); (D.R.P.); (S.K.S.); (N.V.); (G.S.); (B.R.)
- Medical Scientist Training Program, University of Illinois College of Medicine, Chicago, IL 60612, USA
| | - Sunil Kumar Singh
- Department of Surgery, Division of Surgical Oncology, University of Illinois at Chicago, IL 60612, USA; (S.K.); (D.R.P.); (S.K.S.); (N.V.); (G.S.); (B.R.)
- Jesse Brown VA Medical Center, Chicago, IL 60612, USA
| | - Navin Viswakarma
- Department of Surgery, Division of Surgical Oncology, University of Illinois at Chicago, IL 60612, USA; (S.K.); (D.R.P.); (S.K.S.); (N.V.); (G.S.); (B.R.)
- Jesse Brown VA Medical Center, Chicago, IL 60612, USA
| | - Gautam Sondarva
- Department of Surgery, Division of Surgical Oncology, University of Illinois at Chicago, IL 60612, USA; (S.K.); (D.R.P.); (S.K.S.); (N.V.); (G.S.); (B.R.)
- Jesse Brown VA Medical Center, Chicago, IL 60612, USA
| | - Basabi Rana
- Department of Surgery, Division of Surgical Oncology, University of Illinois at Chicago, IL 60612, USA; (S.K.); (D.R.P.); (S.K.S.); (N.V.); (G.S.); (B.R.)
- Jesse Brown VA Medical Center, Chicago, IL 60612, USA
- University of Illinois Hospital & Health Sciences System Cancer Center, University of Illinois at Chicago, Chicago, IL 60612, USA
| | - Ajay Rana
- Department of Surgery, Division of Surgical Oncology, University of Illinois at Chicago, IL 60612, USA; (S.K.); (D.R.P.); (S.K.S.); (N.V.); (G.S.); (B.R.)
- Jesse Brown VA Medical Center, Chicago, IL 60612, USA
- University of Illinois Hospital & Health Sciences System Cancer Center, University of Illinois at Chicago, Chicago, IL 60612, USA
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22
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Manivannan P, Reddy V, Mukherjee S, Clark KN, Malathi K. RNase L Induces Expression of A Novel Serine/Threonine Protein Kinase, DRAK1, to Promote Apoptosis. Int J Mol Sci 2019; 20:E3535. [PMID: 31330998 PMCID: PMC6679093 DOI: 10.3390/ijms20143535] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2019] [Revised: 07/12/2019] [Accepted: 07/17/2019] [Indexed: 11/28/2022] Open
Abstract
Apoptosis of virus-infected cells is an effective antiviral mechanism in addition to interferon induction to establish antiviral state to restrict virus spread. The interferon-inducible 2'-5' oligoadenylate synthetase/RNase L pathway results in activation of RNase L in response to double stranded RNA and cleaves diverse RNA substrates to amplify interferon induction and promote apoptosis. Here we show that RNase L induces expression of Death-associated protein kinase-Related Apoptosis-inducing protein Kinase 1 (DRAK1), a member of the death-associated protein kinase family and interferon-signaling pathway is required for induction. Overexpression of DRAK1 triggers apoptosis in the absence of RNase L activation by activating c-Jun N-terminal kinase (JNK), translocation of BCL2 Associated X (Bax) to the mitochondria accompanied by cytochrome C release and loss of mitochondrial membrane potential promoting cleavage of caspase 3 and Poly(ADP-Ribose) Polymerase 1 (PARP). Inhibitors of JNK and caspase 3 promote survival of DRAK1 overexpressing cells demonstrating an important role of JNK signaling pathway in DRAK1-mediated apoptosis. DRAK1 mutant proteins that lack kinase activity or nuclear localization fail to induce apoptosis highlighting the importance of cellular localization and kinase function in promoting cell death. Our studies identify DRAK1 as a mediator of RNase L-induced apoptosis.
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Affiliation(s)
- Praveen Manivannan
- Department of Biological Sciences, University of Toledo, 2801 West Bancroft Street, Toledo, OH 43606, USA
| | - Vidita Reddy
- Department of Biological Sciences, University of Toledo, 2801 West Bancroft Street, Toledo, OH 43606, USA
| | - Sushovita Mukherjee
- Department of Biological Sciences, University of Toledo, 2801 West Bancroft Street, Toledo, OH 43606, USA
| | - Kirsten Neytania Clark
- Department of Biological Sciences, University of Toledo, 2801 West Bancroft Street, Toledo, OH 43606, USA
| | - Krishnamurthy Malathi
- Department of Biological Sciences, University of Toledo, 2801 West Bancroft Street, Toledo, OH 43606, USA.
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23
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JNK and cardiometabolic dysfunction. Biosci Rep 2019; 39:BSR20190267. [PMID: 31270248 PMCID: PMC6639461 DOI: 10.1042/bsr20190267] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2019] [Revised: 06/28/2019] [Accepted: 07/02/2019] [Indexed: 02/06/2023] Open
Abstract
Cardiometabolic syndrome (CMS) describes the cluster of metabolic and cardiovascular diseases that are generally characterized by impaired glucose tolerance, intra-abdominal adiposity, dyslipidemia, and hypertension. CMS currently affects more than 25% of the world’s population and the rates of diseases are rapidly rising. These CMS conditions represent critical risk factors for cardiovascular diseases including atherosclerosis, heart failure, myocardial infarction, and peripheral artery disease (PAD). Therefore, it is imperative to elucidate the underlying signaling involved in disease onset and progression. The c-Jun N-terminal Kinases (JNKs) are a family of stress signaling kinases that have been recently indicated in CMS. The purpose of this review is to examine the in vivo implications of JNK as a potential therapeutic target for CMS. As the constellation of diseases associated with CMS are complex and involve multiple tissues and environmental triggers, carefully examining what is known about the JNK pathway will be important for specificity in treatment strategies.
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24
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Alvarez F, Fritz JH, Piccirillo CA. Pleiotropic Effects of IL-33 on CD4 + T Cell Differentiation and Effector Functions. Front Immunol 2019; 10:522. [PMID: 30949175 PMCID: PMC6435597 DOI: 10.3389/fimmu.2019.00522] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2018] [Accepted: 02/26/2019] [Indexed: 12/16/2022] Open
Abstract
IL-33, a member of the IL-1 family of cytokines, was originally described in 2005 as a promoter of type 2 immune responses. However, recent evidence reveals a more complex picture. This cytokine is released locally as an alarmin upon cellular damage where innate cell types respond to IL-33 by modulating their differentiation and influencing the polarizing signals they provide to T cells at the time of antigen presentation. Moreover, the prominent expression of the IL-33 receptor, ST2, on GATA3+ T helper 2 cells (TH2) demonstrated that IL-33 could have a direct impact on T cells. Recent observations reveal that T-bet+ TH1 cells and Foxp3+ regulatory T (TREG) cells can also express the ST2 receptor, either transiently or permanently. As such, IL-33 can have a direct effect on the dynamics of T cell populations. As IL-33 release was shown to play both an inflammatory and a suppressive role, understanding the complex effect of this cytokine on T cell homeostasis is paramount. In this review, we will focus on the factors that modulate ST2 expression on T cells, the effect of IL-33 on helper T cell responses and the role of IL-33 on TREG cell function.
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Affiliation(s)
- Fernando Alvarez
- Department of Microbiology and Immunology, McGill University, Montréal, QC, Canada.,Program in Infectious Diseases and Immunology in Global Health, Centre for Translational Biology, The Research Institute of the McGill University Health Center, Montréal, QC, Canada.,Centre of Excellence in Translational Immunology, Montréal, QC, Canada
| | - Jörg H Fritz
- Department of Microbiology and Immunology, McGill University, Montréal, QC, Canada.,Centre of Excellence in Translational Immunology, Montréal, QC, Canada.,McGill University Research Center on Complex Traits, McGill University, Montréal, QC, Canada
| | - Ciriaco A Piccirillo
- Department of Microbiology and Immunology, McGill University, Montréal, QC, Canada.,Program in Infectious Diseases and Immunology in Global Health, Centre for Translational Biology, The Research Institute of the McGill University Health Center, Montréal, QC, Canada.,Centre of Excellence in Translational Immunology, Montréal, QC, Canada.,McGill University Research Center on Complex Traits, McGill University, Montréal, QC, Canada
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25
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Openshaw RL, Kwon J, McColl A, Penninger JM, Cavanagh J, Pratt JA, Morris BJ. JNK signalling mediates aspects of maternal immune activation: importance of maternal genotype in relation to schizophrenia risk. J Neuroinflammation 2019; 16:18. [PMID: 30691477 PMCID: PMC6350402 DOI: 10.1186/s12974-019-1408-5] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2018] [Accepted: 01/11/2019] [Indexed: 12/31/2022] Open
Abstract
Background Important insight into the mechanisms through which gene-environmental interactions cause schizophrenia can be achieved through preclinical studies combining prenatal immune stimuli with disease-related genetic risk modifications. Accumulating evidence associates JNK signalling molecules, including MKK7/MAP2K7, with genetic risk. We tested the hypothesis that Map2k7 gene haploinsufficiency in mice would alter the prenatal immune response to the viral mimetic polyriboinosinic-polyribocytidylic acid (polyI:C), specifically investigating the impact of maternal versus foetal genetic variants. Methods PolyI:C was administered to dams (E12.5), and cytokine/chemokine levels were measured 6 h later, in maternal plasma, placenta and embryonic brain. Results PolyI:C dramatically elevated maternal plasma levels of most cytokines/chemokines. Induction of IL-1β, IL-2, IL-10, IL-12, TNF-α and CXCL3 was enhanced, while CCL5 was suppressed, in Map2k7 hemizygous (Hz) dams relative to controls. Maternal polyI:C administration also increased embryonic brain chemokines, influenced by both maternal and embryonic genotype: CCL5 and CXCL10 levels were higher in embryonic brains from Map2k7 dams versus control dams; for CCL5, this was more pronounced in Map2k7 Hz embryos. Placental CXCL10 and CXCL12 levels were also elevated by polyI:C, the former enhanced and the latter suppressed, in placentae from maternal Map2k7 Hzs relative to control dams receiving polyI:C. Conclusions The results demonstrate JNK signalling as a mediator of MIA effects on the foetus. Since both elevated CXCL10 and supressed CXCL12 compromise developing GABAergic interneurons, the results support maternal immune challenge contributing to schizophrenia-associated neurodevelopmental abnormalities. The influence of Map2k7 on cytokine/chemokine induction converges the genetic and environmental aspects of schizophrenia, and the overt influence of maternal genotype offers an intriguing new insight into modulation of embryonic neurodevelopment by genetic risk. Electronic supplementary material The online version of this article (10.1186/s12974-019-1408-5) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Rebecca L Openshaw
- Institute of Neuroscience and Psychology, West Medical Building, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, G12 8QQ, UK
| | - Jaedeok Kwon
- Institute of Neuroscience and Psychology, West Medical Building, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, G12 8QQ, UK
| | - Alison McColl
- Institute of Inflammation and Immunity, University of Glasgow, Glasgow, UK
| | - Josef M Penninger
- IMBA, Institute for Molecular Biotechnology of the Austrian Academy of Sciences, Vienna, Austria
| | - Jonathan Cavanagh
- Institute of Inflammation and Immunity, University of Glasgow, Glasgow, UK
| | - Judith A Pratt
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, Glasgow, UK
| | - Brian J Morris
- Institute of Neuroscience and Psychology, West Medical Building, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, G12 8QQ, UK.
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26
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Huang S, Dong D, Zhang Y, Chen Z, Geng J, Zhao Y. NEAT1 regulates Th2 cell development by targeting STAT6 for degradation. Cell Cycle 2019; 18:312-319. [PMID: 30654703 DOI: 10.1080/15384101.2018.1562285] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
The aim of this study was to investigate the role of lncRNA NEAT1 (nuclear enriched abundant transcript 1) in regulating Th2 cell differentiation. The overexpression vectors of NEAT1 and ITCH, and siRNA targeting NEAT1, EZH2 (enhancer of zeste homolog 2) and STAT6 (signal transducer and activator of transcription 6) were transfected into CD4+T cells. The mRNA expressions of ITCH and STAT6 were analyzed by qRT-PCR and western blotting. The levels of Th2 cytokines were detected by ELISA assay. RIP and ChIP assays were performed to analyze the association between NEAT1 and EZH2 as well as EZH2 and STAT6, respectively. Results showed that NEAT1 significantly repressed ITCH expression and increased STAT6 expression as well as the levels of IL-4, IL-5 and IL-13 in CD4+T cells. RIP and ChIP assays revealed that NEAT1 bound to EZH2 and EZH2 was recruited to the promoter region of ITCH in CD4+T cells. Silencing EZH2 significantly promoted STAT6 for ubiquitination. Furthermore, NEAT targeted STAT6 for ubiquitination and elevated levels of Th2 cytokines by regulating EZH2/ITCH axis. In conclusion, our data indicated that NEAT1 promotes Th2 cell differentiation through the EZH2/ITCH/STAT6 axis.
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Affiliation(s)
- Shuman Huang
- a The Rhinology Department , The First Affiliated Hospital of Zhengzhou University , Zhengzhou , China.,b The Academy of medical sciences , Zhengzhou University , Zhengzhou , China
| | - Dong Dong
- a The Rhinology Department , The First Affiliated Hospital of Zhengzhou University , Zhengzhou , China
| | - Yaqian Zhang
- a The Rhinology Department , The First Affiliated Hospital of Zhengzhou University , Zhengzhou , China
| | - Zhuo Chen
- a The Rhinology Department , The First Affiliated Hospital of Zhengzhou University , Zhengzhou , China
| | - Jing Geng
- a The Rhinology Department , The First Affiliated Hospital of Zhengzhou University , Zhengzhou , China.,b The Academy of medical sciences , Zhengzhou University , Zhengzhou , China
| | - Yulin Zhao
- a The Rhinology Department , The First Affiliated Hospital of Zhengzhou University , Zhengzhou , China
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27
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Liu J, Gallo RM, Khan MA, Iyer AK, Kratzke IM, Brutkiewicz RR. JNK2 modulates the CD1d-dependent and -independent activation of iNKT cells. Eur J Immunol 2018; 49:255-265. [PMID: 30467836 DOI: 10.1002/eji.201847755] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2018] [Revised: 10/30/2018] [Accepted: 11/21/2018] [Indexed: 01/01/2023]
Abstract
Invariant natural killer T (iNKT) cells play critical roles in autoimmune, anti-tumor, and anti-microbial immune responses, and are activated by glycolipids presented by the MHC class I-like molecule, CD1d. How the activation of signaling pathways impacts antigen (Ag)-dependent iNKT cell activation is not well-known. In the current study, we found that the MAPK JNK2 not only negatively regulates CD1d-mediated Ag presentation in APCs, but also contributes to CD1d-independent iNKT cell activation. A deficiency in the JNK2 (but not JNK1) isoform enhanced Ag presentation by CD1d. Using a vaccinia virus (VV) infection model known to cause a loss in iNKT cells in a CD1d-independent, but IL-12-dependent manner, we found the virus-induced loss of iNKT cells in JNK2 KO mice was substantially lower than that observed in JNK1 KO or wild-type (WT) mice. Importantly, compared to WT mice, JNK2 KO mouse iNKT cells were found to express less surface IL-12 receptors. As with a VV infection, an IL-12 injection also resulted in a smaller decrease in JNK2 KO iNKT cells as compared to WT mice. Overall, our work strongly suggests JNK2 is a negative regulator of CD1d-mediated Ag presentation and contributes to IL-12-induced iNKT cell activation and loss during viral infections.
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Affiliation(s)
- Jianyun Liu
- Department of Microbiology and Immunology, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Richard M Gallo
- Department of Microbiology and Immunology, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Masood A Khan
- Department of Microbiology and Immunology, Indiana University School of Medicine, Indianapolis, IN, USA.,College of Applied Medical Sciences, Al-Qassim University, Buraidah, Saudi Arabia
| | - Abhirami K Iyer
- Department of Microbiology and Immunology, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Ian M Kratzke
- Department of Microbiology and Immunology, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Randy R Brutkiewicz
- Department of Microbiology and Immunology, Indiana University School of Medicine, Indianapolis, IN, USA
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28
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Prenylated quinolinecarboxylic acid derivative prevents neuronal cell death through inhibition of MKK4. Biochem Pharmacol 2018; 162:109-122. [PMID: 30316820 DOI: 10.1016/j.bcp.2018.10.008] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2018] [Accepted: 10/10/2018] [Indexed: 12/16/2022]
Abstract
The development of neuroprotective agents is necessary for the treatment of neurodegenerative diseases. Here, we report PQA-11, a prenylated quinolinecarboxylic acid (PQA) derivative, as a potent neuroprotectant. PQA-11 inhibits glutamate-induced cell death and caspase-3 activation in hippocampal cultures, as well as inhibits N-Methyl-4-phenylpyridinium iodide- and amyloid β1-42-induced cell death in SH-SY5Y cells. PQA-11 also suppresses mitogen-activated protein kinase kinase 4 (MKK4) and c-jun N-terminal kinase (JNK) signaling activated by these neurotoxins. Quartz crystal microbalance analysis and in vitro kinase assay reveal that PQA-11 interacts with MKK4, and inhibits its sphingosine-induced activation. The administration of PQA-11 by intraperitoneal injection alleviates 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine-induced degeneration of nigrostriatal dopaminergic neurons in mice. These results suggest that PQA-11 is a unique MKK4 inhibitor with potent neuroprotective effects in vitro and in vivo. PQA-11 may be a valuable lead for the development of novel neuroprotectants.
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29
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Das M, Zawada WM, West J, Stenmark KR. JNK2 regulates vascular remodeling in pulmonary hypertension. Pulm Circ 2018; 8:2045894018778156. [PMID: 29718758 PMCID: PMC6055330 DOI: 10.1177/2045894018778156] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/14/2017] [Accepted: 04/26/2018] [Indexed: 01/04/2023] Open
Abstract
Pulmonary arterial (PA) wall modifications are key pathological features of pulmonary hypertension (PH). Although such abnormalities correlate with heightened phosphorylation of c-Jun N-terminal kinases 1/2 (JNK1/2) in a rat model of PH, the contribution of specific JNK isoforms to the pathophysiology of PH is unknown. Hence, we hypothesized that activation of either one, or both JNK isoforms regulates PA remodeling in PH. We detected increased JNK1/2 phosphorylation in the thickened vessels of PH patients' lungs compared to that in lungs of healthy individuals. JNK1/2 phosphorylation paralleled a marked reduction in MAP kinase phosphatase 1 (JNK dephosphorylator) expression in patients' lungs. Association of JNK1/2 activation with vascular modification was confirmed in the calf model of severe hypoxia-induced PH. To ascertain the role of each JNK isoform in pathophysiology of PH, wild-type (WT), JNK1 null (JNK1-/-), and JNK2 null (JNK2-/-) mice were exposed to chronic hypoxia (10% O2 for six weeks) to develop PH. In hypoxic WT lungs, an increase in JNK1/2 phosphorylation was associated with PH-like pathology. Hallmarks of PH pathophysiology, i.e. excessive accumulation of extracellular matrix and vessel muscularization with medial wall thickening, was also detected in hypoxic JNK1-/- lungs, but not in hypoxia-exposed JNK2-/- lungs. However, hypoxia-induced increases in right ventricular systolic pressure (RVSP) and in right ventricular hypertrophy (RVH) were similar in all three genotypes. Our findings suggest that JNK2 participates in PA remodeling (but likely not in vasoconstriction) in murine hypoxic PH and that modulating JNK2 actions might quell vascular abnormalities and limit the course of PH.
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Affiliation(s)
- Mita Das
- Department of Internal Medicine, College of Medicine Phoenix, University of Arizona, Phoenix, AZ, USA
| | - W. Michael Zawada
- Department of Basic Medical Sciences, A. T. Still University, School of Osteopathic Medicine Arizona, Mesa, AZ, USA
| | - James West
- Department of Medicine, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Kurt R. Stenmark
- Cardiovascular Pulmonary Research Laboratories, Departments of Pediatrics and Medicine, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
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30
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de Valles-Ibáñez G, Esteve-Solé A, Piquer M, González-Navarro EA, Hernandez-Rodriguez J, Laayouni H, González-Roca E, Plaza-Martin AM, Deyà-Martínez Á, Martín-Nalda A, Martínez-Gallo M, García-Prat M, Del Pino-Molina L, Cuscó I, Codina-Solà M, Batlle-Masó L, Solís-Moruno M, Marquès-Bonet T, Bosch E, López-Granados E, Aróstegui JI, Soler-Palacín P, Colobran R, Yagüe J, Alsina L, Juan M, Casals F. Evaluating the Genetics of Common Variable Immunodeficiency: Monogenetic Model and Beyond. Front Immunol 2018; 9:636. [PMID: 29867916 PMCID: PMC5960686 DOI: 10.3389/fimmu.2018.00636] [Citation(s) in RCA: 106] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2017] [Accepted: 03/14/2018] [Indexed: 12/16/2022] Open
Abstract
Common variable immunodeficiency (CVID) is the most frequent symptomatic primary immunodeficiency characterized by recurrent infections, hypogammaglobulinemia and poor response to vaccines. Its diagnosis is made based on clinical and immunological criteria, after exclusion of other diseases that can cause similar phenotypes. Currently, less than 20% of cases of CVID have a known underlying genetic cause. We have analyzed whole-exome sequencing and copy number variants data of 36 children and adolescents diagnosed with CVID and healthy relatives to estimate the proportion of monogenic cases. We have replicated an association of CVID to p.C104R in TNFRSF13B and reported the second case of homozygous patient to date. Our results also identify five causative genetic variants in LRBA, CTLA4, NFKB1, and PIK3R1, as well as other very likely causative variants in PRKCD, MAPK8, or DOCK8 among others. We experimentally validate the effect of the LRBA stop-gain mutation which abolishes protein production and downregulates the expression of CTLA4, and of the frameshift indel in CTLA4 producing expression downregulation of the protein. Our results indicate a monogenic origin of at least 15–24% of the CVID cases included in the study. The proportion of monogenic patients seems to be lower in CVID than in other PID that have also been analyzed by whole exome or targeted gene panels sequencing. Regardless of the exact proportion of CVID monogenic cases, other genetic models have to be considered for CVID. We propose that because of its prevalence and other features as intermediate penetrancies and phenotypic variation within families, CVID could fit with other more complex genetic scenarios. In particular, in this work, we explore the possibility of CVID being originated by an oligogenic model with the presence of heterozygous mutations in interacting proteins or by the accumulation of detrimental variants in particular immunological pathways, as well as perform association tests to detect association with rare genetic functional variation in the CVID cohort compared to healthy controls.
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Affiliation(s)
- Guillem de Valles-Ibáñez
- Institut de Biologia Evolutiva (UPF-CSIC), Departament de Ciències Experimentals i de la Salut, Universitat Pompeu Fabra, Parc de Recerca Biomèdica de Barcelona, Barcelona, Spain
| | - Ana Esteve-Solé
- Allergy and Clinical Immunology Department, Hospital Sant Joan de Déu, Institut de Recerca Pediàtrica Hospital Sant Joan de Déu, Barcelona, Spain.,Functional Unit of Clinical Immunology Hospital Sant Joan de Déu-Hospital Clinic, Barcelona, Spain
| | - Mònica Piquer
- Allergy and Clinical Immunology Department, Hospital Sant Joan de Déu, Institut de Recerca Pediàtrica Hospital Sant Joan de Déu, Barcelona, Spain.,Functional Unit of Clinical Immunology Hospital Sant Joan de Déu-Hospital Clinic, Barcelona, Spain
| | - E Azucena González-Navarro
- Functional Unit of Clinical Immunology Hospital Sant Joan de Déu-Hospital Clinic, Barcelona, Spain.,Servei d'Immunologia, Centre de Diagnòstic Biomèdic, Hospital Clinic-IDIBAPS, Barcelona, Spain
| | - Jessica Hernandez-Rodriguez
- Institut de Biologia Evolutiva (UPF-CSIC), Departament de Ciències Experimentals i de la Salut, Universitat Pompeu Fabra, Parc de Recerca Biomèdica de Barcelona, Barcelona, Spain
| | - Hafid Laayouni
- Institut de Biologia Evolutiva (UPF-CSIC), Departament de Ciències Experimentals i de la Salut, Universitat Pompeu Fabra, Parc de Recerca Biomèdica de Barcelona, Barcelona, Spain.,Bioinformatics Studies, ESCI-UPF, Barcelona, Spain
| | - Eva González-Roca
- Functional Unit of Clinical Immunology Hospital Sant Joan de Déu-Hospital Clinic, Barcelona, Spain.,Servei d'Immunologia, Centre de Diagnòstic Biomèdic, Hospital Clinic-IDIBAPS, Barcelona, Spain
| | - Ana María Plaza-Martin
- Allergy and Clinical Immunology Department, Hospital Sant Joan de Déu, Institut de Recerca Pediàtrica Hospital Sant Joan de Déu, Barcelona, Spain.,Functional Unit of Clinical Immunology Hospital Sant Joan de Déu-Hospital Clinic, Barcelona, Spain
| | - Ángela Deyà-Martínez
- Allergy and Clinical Immunology Department, Hospital Sant Joan de Déu, Institut de Recerca Pediàtrica Hospital Sant Joan de Déu, Barcelona, Spain.,Functional Unit of Clinical Immunology Hospital Sant Joan de Déu-Hospital Clinic, Barcelona, Spain
| | - Andrea Martín-Nalda
- Pediatric Infectious Diseases and Immunodeficiencies Unit, Hospital Universitari Vall d'Hebron (HUVH), Vall d'Hebron Institut de Recerca (VHIR), Universitat Autònoma de Barcelona, Barcelona, Spain.,Jeffrey Modell Diagnostic and Research Center for Primary Immunodeficiencies, Barcelona, Spain
| | - Mónica Martínez-Gallo
- Jeffrey Modell Diagnostic and Research Center for Primary Immunodeficiencies, Barcelona, Spain.,Immunology Division, Department of Clinical and Molecular Genetics, Hospital Universitari Vall d'Hebron (HUVH), Vall d'Hebron Research Institute (VHIR), Barcelona, Spain.,Department of Cell Biology, Physiology and Immunology, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - Marina García-Prat
- Pediatric Infectious Diseases and Immunodeficiencies Unit, Hospital Universitari Vall d'Hebron (HUVH), Vall d'Hebron Institut de Recerca (VHIR), Universitat Autònoma de Barcelona, Barcelona, Spain.,Jeffrey Modell Diagnostic and Research Center for Primary Immunodeficiencies, Barcelona, Spain
| | - Lucía Del Pino-Molina
- Clinical Immunology Department, University Hospital La Paz and Physiopathology of Lymphocytes in Immunodeficiencies Group, IdiPAZ Institute for Health Research, Madrid, Spain
| | - Ivón Cuscó
- Department of Experimental and Health Sciences, Universitat Pompeu Fabra, Barcelona, Spain.,Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBER-ER), Madrid, Spain
| | - Marta Codina-Solà
- Department of Experimental and Health Sciences, Universitat Pompeu Fabra, Barcelona, Spain.,Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBER-ER), Madrid, Spain
| | - Laura Batlle-Masó
- Institut de Biologia Evolutiva (UPF-CSIC), Departament de Ciències Experimentals i de la Salut, Universitat Pompeu Fabra, Parc de Recerca Biomèdica de Barcelona, Barcelona, Spain.,Servei de Genòmica, Departament de Ciències Experimentals i de la Salut, Universitat Pompeu Fabra, Parc de Recerca Biomèdica de Barcelona, Barcelona, Spain
| | - Manuel Solís-Moruno
- Institut de Biologia Evolutiva (UPF-CSIC), Departament de Ciències Experimentals i de la Salut, Universitat Pompeu Fabra, Parc de Recerca Biomèdica de Barcelona, Barcelona, Spain.,Servei de Genòmica, Departament de Ciències Experimentals i de la Salut, Universitat Pompeu Fabra, Parc de Recerca Biomèdica de Barcelona, Barcelona, Spain
| | - Tomàs Marquès-Bonet
- Institut de Biologia Evolutiva (UPF-CSIC), Departament de Ciències Experimentals i de la Salut, Universitat Pompeu Fabra, Parc de Recerca Biomèdica de Barcelona, Barcelona, Spain.,Catalan Institution of Research and Advanced Studies (ICREA), Barcelona, Spain.,CNAG-CRG, Centre for Genomic Regulation, Barcelona Institute of Science and Technology (BIST), Barcelona, Spain
| | - Elena Bosch
- Institut de Biologia Evolutiva (UPF-CSIC), Departament de Ciències Experimentals i de la Salut, Universitat Pompeu Fabra, Parc de Recerca Biomèdica de Barcelona, Barcelona, Spain
| | - Eduardo López-Granados
- Clinical Immunology Department, University Hospital La Paz and Physiopathology of Lymphocytes in Immunodeficiencies Group, IdiPAZ Institute for Health Research, Madrid, Spain
| | - Juan Ignacio Aróstegui
- Functional Unit of Clinical Immunology Hospital Sant Joan de Déu-Hospital Clinic, Barcelona, Spain.,Servei d'Immunologia, Centre de Diagnòstic Biomèdic, Hospital Clinic-IDIBAPS, Barcelona, Spain
| | - Pere Soler-Palacín
- Pediatric Infectious Diseases and Immunodeficiencies Unit, Hospital Universitari Vall d'Hebron (HUVH), Vall d'Hebron Institut de Recerca (VHIR), Universitat Autònoma de Barcelona, Barcelona, Spain.,Jeffrey Modell Diagnostic and Research Center for Primary Immunodeficiencies, Barcelona, Spain
| | - Roger Colobran
- Jeffrey Modell Diagnostic and Research Center for Primary Immunodeficiencies, Barcelona, Spain.,Immunology Division, Department of Clinical and Molecular Genetics, Hospital Universitari Vall d'Hebron (HUVH), Vall d'Hebron Research Institute (VHIR), Barcelona, Spain.,Department of Cell Biology, Physiology and Immunology, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - Jordi Yagüe
- Functional Unit of Clinical Immunology Hospital Sant Joan de Déu-Hospital Clinic, Barcelona, Spain.,Servei d'Immunologia, Centre de Diagnòstic Biomèdic, Hospital Clinic-IDIBAPS, Barcelona, Spain
| | - Laia Alsina
- Allergy and Clinical Immunology Department, Hospital Sant Joan de Déu, Institut de Recerca Pediàtrica Hospital Sant Joan de Déu, Barcelona, Spain.,Functional Unit of Clinical Immunology Hospital Sant Joan de Déu-Hospital Clinic, Barcelona, Spain
| | - Manel Juan
- Functional Unit of Clinical Immunology Hospital Sant Joan de Déu-Hospital Clinic, Barcelona, Spain.,Servei d'Immunologia, Centre de Diagnòstic Biomèdic, Hospital Clinic-IDIBAPS, Barcelona, Spain
| | - Ferran Casals
- Servei de Genòmica, Departament de Ciències Experimentals i de la Salut, Universitat Pompeu Fabra, Parc de Recerca Biomèdica de Barcelona, Barcelona, Spain
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31
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Balkhi MY, Wittmann G, Xiong F, Junghans RP. YY1 Upregulates Checkpoint Receptors and Downregulates Type I Cytokines in Exhausted, Chronically Stimulated Human T Cells. iScience 2018; 2:105-122. [PMID: 30428369 PMCID: PMC6136936 DOI: 10.1016/j.isci.2018.03.009] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2017] [Revised: 01/31/2018] [Accepted: 02/22/2018] [Indexed: 12/26/2022] Open
Abstract
T cells infiltrate affected organs in chronic infections and malignancy, but they may fail to eradicate virus-infected cells or tumor because of exhaustion. This report describes a Yin Yang-1 (YY1)-centered mechanism for diverse components that have been correlated with exhaustion. Utilizing an in vitro reconstruction of chronic T cell activation, YY1 is shown to positively regulate the checkpoint receptors PD1, Lag3, and Tim3 and to negatively regulate the type I cytokines interleukin-2 (IL-2) (in collaboration with Ezh2 histone methyltransferase) and interferon gamma (IFN-?). Other tests suggest that IL-2 failure drives a large component of cytotoxic functional decline rather than solely checkpoint receptor-ligand interactions that have been the focus of current anti-exhaustion therapies. Clinical evaluations confirm elevated YY1 and Ezh2 in melanoma tumor-infiltrating lymphocytes and in PD1+ T cells in patients with HIV. Exhaustion is revealed to be an active process as the culmination of repetitive two-signal stimulation in a feedback loop via CD3/CD28?p38MAPK/JNK?YY1? exhaustion.
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Affiliation(s)
- Mumtaz Y Balkhi
- Biotherapeutics Development Lab, Division of Hematology/Oncology, Department of Medicine, Tufts University School of Medicine, 800 Washington St, Boston, MA 02111, USA
| | - Gabor Wittmann
- Division of Endocrinology, Diabetes and Metabolism, Department of Medicine, Tufts University School of Medicine, Boston, MA, USA
| | - Fang Xiong
- Biotherapeutics Development Lab, Division of Hematology/Oncology, Department of Medicine, Tufts University School of Medicine, 800 Washington St, Boston, MA 02111, USA
| | - Richard P Junghans
- Biotherapeutics Development Lab, Division of Hematology/Oncology, Department of Medicine, Tufts University School of Medicine, 800 Washington St, Boston, MA 02111, USA.
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32
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Liu Z, Smith KR, Khong HT, Huang J, Ahn EYE, Zhou M, Tan M. miR-125b regulates differentiation and metabolic reprogramming of T cell acute lymphoblastic leukemia by directly targeting A20. Oncotarget 2018; 7:78667-78679. [PMID: 27637078 PMCID: PMC5346668 DOI: 10.18632/oncotarget.12018] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2016] [Accepted: 09/02/2016] [Indexed: 11/25/2022] Open
Abstract
T-cell acute lymphoblastic leukemia (T-ALL) is an aggressive hematopoietic malignancy. Although it has been reported that overexpression of miR-125b leads to T-ALL development, the underlying mechanisms of miR-125b action are still unclear. The goal of this study is to delineate the role of miR-125b in T-ALL development. We found that miR-125b is highly expressed in undifferentiated leukemic T cells (CD4-negative) while its expression is low in differentiated T cells (CD4-positive). Overexpression of miR-125b increased the CD4-negative population in T cells, whereas depletion of miR-125b by miR-125b-sponge decreased the CD4-negative cell population. We identified that A20 (TNFAIP3) is a direct target of miR-125b in T cells. Overexpression of miR-125b also increased glucose uptake and oxygen consumption in T cells through targeting A20. Furthermore, restoration of A20 in miR-125b-overexpressing cells decreased the CD4-negative population in T cell leukemia, and decreased glucose uptake and oxygen consumption to the basal level of T cells transfected with vector. In conclusion, our data demonstrate that miR-125b regulates differentiation and reprogramming of T cell glucose metabolism via targeting A20. Since both de-differentiation and dysregulated glucose metabolism contribute to the development of T-cell leukemia, these findings provide novel insights into the understanding and treatment of T-ALL.
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Affiliation(s)
- Zixing Liu
- Mitchell Cancer Institute, University of South Alabama, Mobile, AL, USA
| | - Kelly R Smith
- Mitchell Cancer Institute, University of South Alabama, Mobile, AL, USA
| | - Hung T Khong
- Huntsman Cancer Institute, University of Utah, Salt Lake City, Utah, USA
| | - Jingshan Huang
- School of Computing, University of South Alabama, Mobile, AL, USA
| | | | - Ming Zhou
- Cancer Research Institute, Central South University, Changsha, Hunan, China
| | - Ming Tan
- Mitchell Cancer Institute, University of South Alabama, Mobile, AL, USA.,Department of Biochemistry & Molecular Biology, University of South Alabama, Mobile, AL, USA
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33
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c-Jun N-terminal kinase 1 defective CD4+CD25+FoxP3+ cells prolong islet allograft survival in diabetic mice. Sci Rep 2018; 8:3310. [PMID: 29459675 PMCID: PMC5818514 DOI: 10.1038/s41598-018-21477-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2017] [Accepted: 02/05/2018] [Indexed: 02/06/2023] Open
Abstract
CD4+CD25+FoxP3+ cells (Tregs) inhibit inflammatory immune responses to allografts. Here, we found that co-transplantation of allogeneic pancreatic islets with Tregs that are defective in c-Jun N-terminal kinase 1 (JNK1) signaling prolongs islet allograft survival in the liver parenchyma of chemically induced diabetic mice (CDM). Adoptively transferred JNK1−/− but not wild-type (WT) Tregs survive longer in the liver parenchyma of CDM. JNK1−/− Tregs are resistant to apoptosis and express anti-apoptotic molecules. JNK1−/− Tregs express higher levels of lymphocyte activation gene-3 molecule (LAG-3) on their surface and produce higher amounts of the anti-inflammatory cytokine interleukin (IL)-10 compared with WT Tregs. JNK1−/− Tregs inhibit liver alloimmune responses more efficiently than WT Tregs. JNK1−/− but not WT Tregs are able to inhibit IL-17 and IL-21 production through enhanced LAG-3 expression and IL-10 production. Our study identifies a novel role of JNK1 signaling in Tregs that enhances islet allograft survival in the liver parenchyma of CDM.
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34
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Risco A, Martin-Serrano MA, Barber DF, Cuenda A. p38γ and p38δ Are Involved in T Lymphocyte Development. Front Immunol 2018; 9:65. [PMID: 29434594 PMCID: PMC5796910 DOI: 10.3389/fimmu.2018.00065] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2017] [Accepted: 01/10/2018] [Indexed: 01/27/2023] Open
Abstract
p38 mitogen-activated protein kinase (MAPK) signal transduction pathways are essential regulators of the immune response. Particularly, p38γ and p38δ regulate many immune cell functions such as cytokine production, migration, or T cell activation; however, their involvement in immune cell development is largely unknown. Here, we analysed the role of p38 MAPK isoforms p38γ and p38δ in T cell differentiation in the thymus and in lymph nodes, using mice deficient in p38γ, p38δ, or in both. We found that the T cell differentiation program in the thymus was affected at different stages in p38γ-, p38δ-, and p38γ/δ-deficient mice, and also peripheral T cell homaeostasis was compromised. Particularly, p38δ deletion affects different stages of early CD4−CD8− double-negative thymocyte development, whereas lack of p38γ favours thymocyte positive selection from CD4+CD8+ double-positive to CD4+ or CD8+ single-positive cells. Our results identify unreported functions for p38γ and p38δ in T cells.
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Affiliation(s)
- Ana Risco
- Department of Immunology and Oncology, Centro Nacional de Biotecnología (CSIC), Madrid, Spain
| | - Miguel A Martin-Serrano
- Department of Immunology and Oncology, Centro Nacional de Biotecnología (CSIC), Madrid, Spain
| | - Domingo F Barber
- Department of Immunology and Oncology, Centro Nacional de Biotecnología (CSIC), Madrid, Spain
| | - Ana Cuenda
- Department of Immunology and Oncology, Centro Nacional de Biotecnología (CSIC), Madrid, Spain
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35
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Shen Y, Park CS, Suppipat K, Mistretta TA, Puppi M, Horton TM, Rabin K, Gray NS, Meijerink JPP, Lacorazza HD. Inactivation of KLF4 promotes T-cell acute lymphoblastic leukemia and activates the MAP2K7 pathway. Leukemia 2016; 31:1314-1324. [PMID: 27872496 DOI: 10.1038/leu.2016.339] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2016] [Revised: 10/14/2016] [Accepted: 10/21/2016] [Indexed: 02/06/2023]
Abstract
T-cell acute lymphoblastic leukemia (T-ALL) is an aggressive hematological malignancy with a high incidence of relapse in pediatric ALL. Although most T-ALL patients exhibit activating mutations in NOTCH1, the cooperating genetic events required to accelerate the onset of leukemia and worsen disease progression are largely unknown. Here, we show that the gene encoding the transcription factor KLF4 is inactivated by DNA methylation in children with T-ALL. In mice, loss of KLF4 accelerated the development of NOTCH1-induced T-ALL by enhancing the G1-to-S transition in leukemic cells and promoting the expansion of leukemia-initiating cells. Mechanistically, KLF4 represses the gene encoding the kinase MAP2K7. Our results showed that in murine and pediatric T-ALL, loss of KLF4 leads to aberrant activation of MAP2K7 and of the downstream effectors JNK and ATF2. As a proof-of-concept for the development of a targeted therapy, administration of JNK inhibitors reduced the expansion of leukemia cells in cell-based and patient-derived xenograft models. Collectively, these data uncover a novel function for KLF4 in regulating the MAP2K7 pathway in T-ALL cells, which can be targeted to eradicate leukemia-initiating cells in T-ALL patients.
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Affiliation(s)
- Y Shen
- Department of Pathology &Immunology, Baylor College of Medicine, Houston, TX, USA
| | - C S Park
- Department of Pathology &Immunology, Baylor College of Medicine, Houston, TX, USA
| | - K Suppipat
- Texas Children's Cancer and Hematology Center, Houston, TX, USA
| | - T-A Mistretta
- Department of Pathology &Immunology, Baylor College of Medicine, Houston, TX, USA
| | - M Puppi
- Department of Pathology &Immunology, Baylor College of Medicine, Houston, TX, USA
| | - T M Horton
- Texas Children's Cancer and Hematology Center, Houston, TX, USA.,Department of Pediatrics, Baylor College of Medicine, Texas Children's Hospital, Houston, TX, USA
| | - K Rabin
- Texas Children's Cancer and Hematology Center, Houston, TX, USA.,Department of Pediatrics, Baylor College of Medicine, Texas Children's Hospital, Houston, TX, USA
| | - N S Gray
- Department of Cancer Biology, Dana Farber Cancer Institute, Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, MA, USA
| | - J P P Meijerink
- Department of Pediatric Oncology/Hematology, Erasmus Medical Center/Sophia Children's Hospital, Rotterdam and the Princess Máxima Center for Pediatric Oncology, Utrecht, The Netherlands
| | - H D Lacorazza
- Department of Pathology &Immunology, Baylor College of Medicine, Houston, TX, USA.,Department of Pediatrics, Baylor College of Medicine, Texas Children's Hospital, Houston, TX, USA
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36
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Hotamisligil GS, Davis RJ. Cell Signaling and Stress Responses. Cold Spring Harb Perspect Biol 2016; 8:8/10/a006072. [PMID: 27698029 DOI: 10.1101/cshperspect.a006072] [Citation(s) in RCA: 294] [Impact Index Per Article: 36.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Stress-signaling pathways are evolutionarily conserved and play an important role in the maintenance of homeostasis. These pathways are also critical for adaptation to new cellular environments. The endoplasmic reticulum (ER) unfolded protein response (UPR) is activated by biosynthetic stress and leads to a compensatory increase in ER function. The JNK and p38 MAPK signaling pathways control adaptive responses to intracellular and extracellular stresses, including environmental changes such as UV light, heat, and hyperosmotic conditions, and exposure to inflammatory cytokines. Metabolic stress caused by a high-fat diet represents an example of a stimulus that coordinately activates both the UPR and JNK/p38 signaling pathways. Chronic activation of these stress-response pathways ultimately causes metabolic changes associated with obesity and altered insulin sensitivity. Stress-signaling pathways, therefore, represent potential targets for therapeutic intervention in the metabolic stress response and other disease processes.
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Affiliation(s)
- Gökhan S Hotamisligil
- Department of Genetics and Complex Diseases, Broad Institute of Harvard-MIT, Harvard School of Public Health, Boston, Massachusetts 02115
| | - Roger J Davis
- Howard Hughes Medical Institute and Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, Massachusetts 01605
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37
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Roychoudhuri R, Clever D, Li P, Wakabayashi Y, Quinn KM, Klebanoff CA, Ji Y, Sukumar M, Eil RL, Yu Z, Spolski R, Palmer DC, Pan JH, Patel SJ, Macallan DC, Fabozzi G, Shih HY, Kanno Y, Muto A, Zhu J, Gattinoni L, O'Shea JJ, Okkenhaug K, Igarashi K, Leonard WJ, Restifo NP. BACH2 regulates CD8(+) T cell differentiation by controlling access of AP-1 factors to enhancers. Nat Immunol 2016; 17:851-860. [PMID: 27158840 PMCID: PMC4918801 DOI: 10.1038/ni.3441] [Citation(s) in RCA: 181] [Impact Index Per Article: 22.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2015] [Accepted: 03/16/2016] [Indexed: 12/14/2022]
Abstract
T cell antigen receptor (TCR) signaling drives distinct responses depending on the differentiation state and context of CD8(+) T cells. We hypothesized that access of signal-dependent transcription factors (TFs) to enhancers is dynamically regulated to shape transcriptional responses to TCR signaling. We found that the TF BACH2 restrains terminal differentiation to enable generation of long-lived memory cells and protective immunity after viral infection. BACH2 was recruited to enhancers, where it limited expression of TCR-driven genes by attenuating the availability of activator protein-1 (AP-1) sites to Jun family signal-dependent TFs. In naive cells, this prevented TCR-driven induction of genes associated with terminal differentiation. Upon effector differentiation, reduced expression of BACH2 and its phosphorylation enabled unrestrained induction of TCR-driven effector programs.
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Affiliation(s)
- Rahul Roychoudhuri
- National Cancer Institute, National Institutes of Health (NIH), Bethesda, MD., USA
- Laboratory of Lymphocyte Signalling and Development, The Babraham Institute, Cambridge, UK
| | - David Clever
- National Cancer Institute, National Institutes of Health (NIH), Bethesda, MD., USA
- Medical Scientist Training Program, Ohio State University College of Medicine, Columbus, OH., USA
| | - Peng Li
- Laboratory of Molecular Immunology and the Immunology Center, National Heart, Lung and Blood Institute (NHLBI), NIH, Bethesda, MD., USA
| | | | - Kylie M Quinn
- Vaccine Research Center, National Institute of Allergy and Infectious Diseases, NIH, Bethesda, MD., USA
| | | | - Yun Ji
- National Cancer Institute, National Institutes of Health (NIH), Bethesda, MD., USA
| | | | - Robert L Eil
- National Cancer Institute, National Institutes of Health (NIH), Bethesda, MD., USA
| | - Zhiya Yu
- National Cancer Institute, National Institutes of Health (NIH), Bethesda, MD., USA
| | - Rosanne Spolski
- Laboratory of Molecular Immunology and the Immunology Center, National Heart, Lung and Blood Institute (NHLBI), NIH, Bethesda, MD., USA
| | - Douglas C Palmer
- National Cancer Institute, National Institutes of Health (NIH), Bethesda, MD., USA
| | - Jenny H Pan
- National Cancer Institute, National Institutes of Health (NIH), Bethesda, MD., USA
| | - Shashank J Patel
- National Cancer Institute, National Institutes of Health (NIH), Bethesda, MD., USA
| | - Derek C Macallan
- Institute for Infection & Immunity, St. George's University of London, London, UK
| | - Giulia Fabozzi
- National Cancer Institute, National Institutes of Health (NIH), Bethesda, MD., USA
| | - Han-Yu Shih
- Molecular Immunology and Inflammation Branch, National Institute of Arthritis and Musculoskeletal and Skin Diseases, NIH, Bethesda, MD., USA
| | - Yuka Kanno
- Molecular Immunology and Inflammation Branch, National Institute of Arthritis and Musculoskeletal and Skin Diseases, NIH, Bethesda, MD., USA
| | - Akihiko Muto
- Department of Biochemistry, Tohoku University Graduate School of Medicine, Sendai, Japan
- AMED-CREST, Japan Agency for Medical Research and Development, Tokyo, Japan
| | - Jun Zhu
- Systems Biology Center, NHLBI, NIH, Bethesda, MD., USA
| | - Luca Gattinoni
- National Cancer Institute, National Institutes of Health (NIH), Bethesda, MD., USA
| | - John J O'Shea
- Molecular Immunology and Inflammation Branch, National Institute of Arthritis and Musculoskeletal and Skin Diseases, NIH, Bethesda, MD., USA
| | - Klaus Okkenhaug
- Laboratory of Lymphocyte Signalling and Development, The Babraham Institute, Cambridge, UK
| | - Kazuhiko Igarashi
- Department of Biochemistry, Tohoku University Graduate School of Medicine, Sendai, Japan
- AMED-CREST, Japan Agency for Medical Research and Development, Tokyo, Japan
| | - Warren J Leonard
- Laboratory of Molecular Immunology and the Immunology Center, National Heart, Lung and Blood Institute (NHLBI), NIH, Bethesda, MD., USA
| | - Nicholas P Restifo
- National Cancer Institute, National Institutes of Health (NIH), Bethesda, MD., USA
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38
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Cunningham CA, Cardwell LN, Guan Y, Teixeiro E, Daniels MA. POSH Regulates CD4+ T Cell Differentiation and Survival. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2016; 196:4003-13. [PMID: 27084103 PMCID: PMC4868786 DOI: 10.4049/jimmunol.1501728] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2015] [Accepted: 03/14/2016] [Indexed: 12/24/2022]
Abstract
The scaffold molecule POSH is crucial for the regulation of proliferation and effector function in CD8(+) T cells. However, its role in CD4(+) T cells is not known. In this study, we found that disruption of the POSH scaffold complex established a transcriptional profile that strongly skewed differentiation toward Th2, led to decreased survival, and had no effect on cell cycle entry. This is in stark contrast to CD8(+) T cells in which POSH regulates cell cycle and does not affect survival. Disruption of POSH in CD4(+) T cells resulted in the loss of Tak1-dependent activation of JNK1/2 and Tak1-mediated survival. However, in CD8(+) T cells, POSH regulates only JNK1. Remarkably, each type of T cell had a unique composition of the POSH scaffold complex and distinct posttranslational modifications of POSH. These data indicate that the mechanism that regulates POSH function in CD4(+) T cells is different from CD8(+) T cells. All together, these data strongly suggest that POSH is essential for the integration of cell-type-specific signals that regulate the differentiation, survival, and function of T cells.
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Affiliation(s)
- Cody A Cunningham
- Department of Molecular Microbiology and Immunology, School of Medicine, University of Missouri, Columbia, MO 65212
| | - Leah N Cardwell
- Department of Molecular Microbiology and Immunology, School of Medicine, University of Missouri, Columbia, MO 65212
| | - Yue Guan
- Department of Molecular Microbiology and Immunology, School of Medicine, University of Missouri, Columbia, MO 65212
| | - Emma Teixeiro
- Department of Molecular Microbiology and Immunology, School of Medicine, University of Missouri, Columbia, MO 65212
| | - Mark A Daniels
- Department of Molecular Microbiology and Immunology, School of Medicine, University of Missouri, Columbia, MO 65212
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39
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Babaev VR, Yeung M, Erbay E, Ding L, Zhang Y, May JM, Fazio S, Hotamisligil GS, Linton MF. Jnk1 Deficiency in Hematopoietic Cells Suppresses Macrophage Apoptosis and Increases Atherosclerosis in Low-Density Lipoprotein Receptor Null Mice. Arterioscler Thromb Vasc Biol 2016; 36:1122-31. [PMID: 27102962 DOI: 10.1161/atvbaha.116.307580] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2015] [Accepted: 04/04/2016] [Indexed: 12/18/2022]
Abstract
OBJECTIVE The c-Jun NH2-terminal kinases (JNK) are regulated by a wide variety of cellular stresses and have been implicated in apoptotic signaling. Macrophages express 2 JNK isoforms, JNK1 and JNK2, which may have different effects on cell survival and atherosclerosis. APPROACH AND RESULTS To dissect the effect of macrophage JNK1 and JNK2 on early atherosclerosis, Ldlr(-/-) mice were reconstituted with wild-type, Jnk1(-/-), and Jnk2(-/-) hematopoietic cells and fed a high cholesterol diet. Jnk1(-/-)→Ldlr(-/-) mice have larger atherosclerotic lesions with more macrophages and fewer apoptotic cells than mice transplanted with wild-type or Jnk2(-/-) cells. Moreover, genetic ablation of JNK to a single allele (Jnk1(+/-)/Jnk2(-/-) or Jnk1(-/-)/Jnk2(+/-)) in marrow of Ldlr(-/-) recipients further increased atherosclerosis compared with Jnk1(-/-)→Ldlr(-/-) and wild-type→Ldlr(-/-) mice. In mouse macrophages, anisomycin-mediated JNK signaling antagonized Akt activity, and loss of Jnk1 gene obliterated this effect. Similarly, pharmacological inhibition of JNK1, but not JNK2, markedly reduced the antagonizing effect of JNK on Akt activity. Prolonged JNK signaling in the setting of endoplasmic reticulum stress gradually extinguished Akt and Bad activity in wild-type cells with markedly less effects in Jnk1(-/-) macrophages, which were also more resistant to apoptosis. Consequently, anisomycin increased and JNK1 inhibitors suppressed endoplasmic reticulum stress-mediated apoptosis in macrophages. We also found that genetic and pharmacological inhibition of phosphatase and tensin homolog abolished the JNK-mediated effects on Akt activity, indicating that phosphatase and tensin homolog mediates crosstalk between these pathways. CONCLUSIONS Loss of Jnk1, but not Jnk2, in macrophages protects them from apoptosis, increasing cell survival, and this accelerates early atherosclerosis.
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Affiliation(s)
- Vladimir R Babaev
- From the Departments of Medicine (V.R.B., M.Y., L.D., Y.Z., J.M.M., M.F.L.) and Pharmacology (M.F.L.), Vanderbilt University Medical Center, Nashville, TN; Department of Molecular Biology and Genetics, Bilkent University, Ankara, Turkey (E.E.); Department of Medicine, Oregon Health & Science University, Portland, OR (S.F.); and Department of Genetics & Complex Diseases & Sabri Ulker Center, Harvard School of Public Health, Boston, MA (G.S.H.).
| | - Michele Yeung
- From the Departments of Medicine (V.R.B., M.Y., L.D., Y.Z., J.M.M., M.F.L.) and Pharmacology (M.F.L.), Vanderbilt University Medical Center, Nashville, TN; Department of Molecular Biology and Genetics, Bilkent University, Ankara, Turkey (E.E.); Department of Medicine, Oregon Health & Science University, Portland, OR (S.F.); and Department of Genetics & Complex Diseases & Sabri Ulker Center, Harvard School of Public Health, Boston, MA (G.S.H.)
| | - Ebru Erbay
- From the Departments of Medicine (V.R.B., M.Y., L.D., Y.Z., J.M.M., M.F.L.) and Pharmacology (M.F.L.), Vanderbilt University Medical Center, Nashville, TN; Department of Molecular Biology and Genetics, Bilkent University, Ankara, Turkey (E.E.); Department of Medicine, Oregon Health & Science University, Portland, OR (S.F.); and Department of Genetics & Complex Diseases & Sabri Ulker Center, Harvard School of Public Health, Boston, MA (G.S.H.)
| | - Lei Ding
- From the Departments of Medicine (V.R.B., M.Y., L.D., Y.Z., J.M.M., M.F.L.) and Pharmacology (M.F.L.), Vanderbilt University Medical Center, Nashville, TN; Department of Molecular Biology and Genetics, Bilkent University, Ankara, Turkey (E.E.); Department of Medicine, Oregon Health & Science University, Portland, OR (S.F.); and Department of Genetics & Complex Diseases & Sabri Ulker Center, Harvard School of Public Health, Boston, MA (G.S.H.)
| | - Youmin Zhang
- From the Departments of Medicine (V.R.B., M.Y., L.D., Y.Z., J.M.M., M.F.L.) and Pharmacology (M.F.L.), Vanderbilt University Medical Center, Nashville, TN; Department of Molecular Biology and Genetics, Bilkent University, Ankara, Turkey (E.E.); Department of Medicine, Oregon Health & Science University, Portland, OR (S.F.); and Department of Genetics & Complex Diseases & Sabri Ulker Center, Harvard School of Public Health, Boston, MA (G.S.H.)
| | - James M May
- From the Departments of Medicine (V.R.B., M.Y., L.D., Y.Z., J.M.M., M.F.L.) and Pharmacology (M.F.L.), Vanderbilt University Medical Center, Nashville, TN; Department of Molecular Biology and Genetics, Bilkent University, Ankara, Turkey (E.E.); Department of Medicine, Oregon Health & Science University, Portland, OR (S.F.); and Department of Genetics & Complex Diseases & Sabri Ulker Center, Harvard School of Public Health, Boston, MA (G.S.H.)
| | - Sergio Fazio
- From the Departments of Medicine (V.R.B., M.Y., L.D., Y.Z., J.M.M., M.F.L.) and Pharmacology (M.F.L.), Vanderbilt University Medical Center, Nashville, TN; Department of Molecular Biology and Genetics, Bilkent University, Ankara, Turkey (E.E.); Department of Medicine, Oregon Health & Science University, Portland, OR (S.F.); and Department of Genetics & Complex Diseases & Sabri Ulker Center, Harvard School of Public Health, Boston, MA (G.S.H.)
| | - Gökhan S Hotamisligil
- From the Departments of Medicine (V.R.B., M.Y., L.D., Y.Z., J.M.M., M.F.L.) and Pharmacology (M.F.L.), Vanderbilt University Medical Center, Nashville, TN; Department of Molecular Biology and Genetics, Bilkent University, Ankara, Turkey (E.E.); Department of Medicine, Oregon Health & Science University, Portland, OR (S.F.); and Department of Genetics & Complex Diseases & Sabri Ulker Center, Harvard School of Public Health, Boston, MA (G.S.H.)
| | - MacRae F Linton
- From the Departments of Medicine (V.R.B., M.Y., L.D., Y.Z., J.M.M., M.F.L.) and Pharmacology (M.F.L.), Vanderbilt University Medical Center, Nashville, TN; Department of Molecular Biology and Genetics, Bilkent University, Ankara, Turkey (E.E.); Department of Medicine, Oregon Health & Science University, Portland, OR (S.F.); and Department of Genetics & Complex Diseases & Sabri Ulker Center, Harvard School of Public Health, Boston, MA (G.S.H.).
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40
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Widespread JNK-dependent alternative splicing induces a positive feedback loop through CELF2-mediated regulation of MKK7 during T-cell activation. Genes Dev 2016; 29:2054-66. [PMID: 26443849 PMCID: PMC4604346 DOI: 10.1101/gad.267245.115] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
In this study, Martinez et al. find a positive feedback loop in the JNK signaling pathway through the alternative splicing of MKK7, identify the RNA-binding protein CELF2 as a major regulator of MKK7 splicing, and show that ∼25% of T-cell receptor-mediated alternative splicing events are dependent on JNK signaling. This study provides insight into a novel paradigm for the reciprocal interplay of signaling and splicing. Alternative splicing is prevalent among genes encoding signaling molecules; however, the functional consequence of differential isoform expression remains largely unknown. Here we demonstrate that, in response to T-cell activation, the Jun kinase (JNK) kinase MAP kinase kinase 7 (MKK7) is alternatively spliced to favor an isoform that lacks exon 2. This isoform restores a JNK-docking site within MKK7 that is disrupted in the larger isoform. Consistently, we show that skipping of MKK7 exon 2 enhances JNK pathway activity, as indicated by c-Jun phosphorylation and up-regulation of TNF-α. Moreover, this splicing event is itself dependent on JNK signaling. Thus, MKK7 alternative splicing represents a positive feedback loop through which JNK promotes its own signaling. We further show that repression of MKK7 exon 2 is dependent on the presence of flanking sequences and the JNK-induced expression of the RNA-binding protein CELF2, which binds to these regulatory elements. Finally, we found that ∼25% of T-cell receptor-mediated alternative splicing events are dependent on JNK signaling. Strikingly, these JNK-dependent events are also significantly enriched for responsiveness to CELF2. Together, our data demonstrate a widespread role for the JNK–CELF2 axis in controlling splicing during T-cell activation, including a specific role in propagating JNK signaling.
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41
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Wang F, Reece EA, Yang P. Advances in revealing the molecular targets downstream of oxidative stress-induced proapoptotic kinase signaling in diabetic embryopathy. Am J Obstet Gynecol 2015; 213:125-34. [PMID: 25595581 DOI: 10.1016/j.ajog.2015.01.016] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2014] [Revised: 12/20/2014] [Accepted: 01/08/2015] [Indexed: 01/06/2023]
Abstract
Preexisting maternal diabetes is a high-risk factor of diabetic embryopathy, such as neural tube defects and congenital heart defects. Maternal diabetes significantly increases the production of reactive oxygen species, resulting in oxidative stress and diabetic embryopathy. Multiple cellular and metabolic factors contribute to these processes. Forkhead box O (FoxO)-3a has been demonstrated as a key transcription factor in the signaling transduction pathways responsible for maternal diabetes-induced birth defects. Apoptosis signal-regulating kinase 1 (ASK1) activated by oxidative stress stimulates nuclear translocation of FoxO3a, resulting in the overexpression of tumor necrosis factor receptor 1-associated death domain protein, which, in turn, leads to caspase-8 activation and apoptosis. Maternal diabetes-activated c-Jun N-terminal kinase (JNK)-1/2, downstream effectors of ASK1, can be blocked by superoxide dismutase-1 overexpression, suggesting that oxidative stress is responsible for JNK1/2 signaling activation. Deletion of JNK1/2 significantly suppressed the activity of FoxO3a. These observations indicate that maternal diabetes-induced oxidative stress stimulates the activation of ASK1, JNK1/2, FoxO3a, tumor necrosis factor receptor 1-associated death domain protein, caspase-8 cleavage, and finally, apoptosis and diabetic embryopathy.
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42
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Yang P, Reece EA, Wang F, Gabbay-Benziv R. Decoding the oxidative stress hypothesis in diabetic embryopathy through proapoptotic kinase signaling. Am J Obstet Gynecol 2015; 212:569-79. [PMID: 25434839 PMCID: PMC4417047 DOI: 10.1016/j.ajog.2014.11.036] [Citation(s) in RCA: 58] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2014] [Revised: 11/14/2014] [Accepted: 11/24/2014] [Indexed: 12/25/2022]
Abstract
Maternal diabetes-induced birth defects occur in 6-10% of babies born to mothers with pregestational diabetes, representing a significant maternal-fetal health problem. Currently, these congenital malformations represent a significant maternal-fetal medicine issue, but are likely to create an even greater public health threat as 3 million women of reproductive age (19-44 years) have diabetes in the United States alone, and this number is expected to double by 2030. Neural tube defects (NTDs) and congenital heart defects are the most common types of birth defects associated with maternal diabetes. Animal studies have revealed that embryos under hyperglycemic conditions exhibit high levels of oxidative stress resulting from enhanced production of reactive oxygen species and impaired antioxidant capability. Oxidative stress activates a set of proapoptotic kinase signaling intermediates leading to abnormal cell death in the embryonic neural tube, which causes NTD formation. Work in animal models also has revealed that maternal diabetes triggers a series of signaling intermediates: protein kinase C (PKC) isoforms, PKCα, βII and δ; apoptosis signal-regulating kinase 1; c-Jun-N-terminal kinase (JNK)1/2; caspase; and apoptosis. Specifically, maternal diabetes in rodent models activates the proapoptotic unfolded protein response and endoplasmic reticulum (ER) stress. A reciprocal causation between JNK1/2 activation and ER stress exists in diabetic embryopathy. Molecular studies further demonstrate that deletion of the genes for Prkc, Ask1, Jnk1, or Jnk2 abolishes maternal diabetes-induced neural progenitor apoptosis and ameliorates NTD formation. Similar preventive effects are also observed when apoptosis signal-regulating kinase 1, JNK1/2, or ER stress is inhibited. Cell membrane stabilizers and antioxidant supplements are also effective in prevention of diabetes-induced birth defects. Mechanistic studies have revealed important insights into our understanding the cause of diabetic embryopathy and have provided a basis for future interventions against birth defects or other pregnancy complications associated with maternal diabetes. The knowledge of a molecular pathway map identified in animal studies has created unique opportunities to identify molecular targets for therapeutic intervention.
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Affiliation(s)
- Peixin Yang
- Department of Obstetrics, Gynecology, and Reproductive Sciences, University of Maryland School of Medicine, Baltimore, MD; Department of Biochemistry and Molecular Biology, University of Maryland School of Medicine, Baltimore, MD.
| | - E Albert Reece
- Department of Obstetrics, Gynecology, and Reproductive Sciences, University of Maryland School of Medicine, Baltimore, MD; Department of Biochemistry and Molecular Biology, University of Maryland School of Medicine, Baltimore, MD
| | - Fang Wang
- Department of Obstetrics, Gynecology, and Reproductive Sciences, University of Maryland School of Medicine, Baltimore, MD
| | - Rinat Gabbay-Benziv
- Department of Obstetrics, Gynecology, and Reproductive Sciences, University of Maryland School of Medicine, Baltimore, MD
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43
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Zhang Y, Nallaparaju KC, Liu X, Jiao H, Reynolds JM, Wang ZX, Dong C. MAPK phosphatase 7 regulates T cell differentiation via inhibiting ERK-mediated IL-2 expression. THE JOURNAL OF IMMUNOLOGY 2015; 194:3088-95. [PMID: 25716993 DOI: 10.4049/jimmunol.1402638] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Members of the MAPK phosphatase (MKP) protein family play critical roles in immune responses through differential regulation of MAPK activation. In this study, we show that MKP7, also known as dual-specificity phosphatase 16, was required for CD4(+) T cell responses in vivo. Mkp7(-/-) CD4(+) T cells exhibited enhanced ERK and JNK activation, and produced increased amount of IL-2 compared with Mkp7(+/+) cells upon activation. Mkp7(-/-) CD4(+) T cells were selectively defective in Th17 differentiation in vitro, which was rescued by blocking IL-2 or inhibition of ERK activation. Furthermore, mice carrying Mkp7(-/-) T cells were deficient in generation of Th17 and T follicular helper cells in vivo, and were resistant to autoimmune experimental encephalomyelitis. Our results thus demonstrate an essential role of MKP7 in effector T cell function.
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Affiliation(s)
- Yongliang Zhang
- Immunology Programme, Life Science Institute, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117597; Department of Microbiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117597;
| | - Kalyan C Nallaparaju
- Department of Immunology, Center for Inflammation and Cancer, MD Anderson Cancer Center, Houston, TX 77030; and
| | - Xin Liu
- Tsinghua University School of Medicine, Beijing, China 100084
| | - Huipeng Jiao
- Immunology Programme, Life Science Institute, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117597; Department of Microbiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117597
| | - Joseph M Reynolds
- Department of Microbiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117597
| | - Zhi-Xin Wang
- Department of Immunology, Center for Inflammation and Cancer, MD Anderson Cancer Center, Houston, TX 77030; and
| | - Chen Dong
- Tsinghua University School of Medicine, Beijing, China 100084
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Suddason T, Gallagher E. A RING to rule them all? Insights into the Map3k1 PHD motif provide a new mechanistic understanding into the diverse roles of Map3k1. Cell Death Differ 2015; 22:540-8. [PMID: 25613373 PMCID: PMC4356348 DOI: 10.1038/cdd.2014.239] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2014] [Revised: 12/15/2014] [Accepted: 12/17/2014] [Indexed: 12/26/2022] Open
Abstract
Despite the sizable number of components that comprise Mapk cascades, Map3k1 is the only element that contains both a kinase domain and a plant homeodomain (PHD) motif, allowing Map3k1 to regulate the protein phosphorylation and ubiquitin proteasome systems. As such, Map3k1 has complex roles in the regulation of cell death, survival, migration and differentiation. Numerous mouse and human genetic analyses have demonstrated that Map3k1 is of critical importance for the immune system, cardiac tissue, testis, wound healing, tumorigenesis and cancer. Recent gene knockin of Map3k1 to mutate the E2 binding site within the Map3k1 PHD motif and high throughput ubiquitin protein array screening for Map3k1 PHD motif substrates provide critical novel insights into Map3k1 PHD motif signal transduction and bring a brand-new understanding to Map3k1 signaling in mammalian biology.
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Affiliation(s)
- T Suddason
- Department of Medicine, Imperial College London, Du Cane Road, London, UK
| | - E Gallagher
- Department of Medicine, Imperial College London, Du Cane Road, London, UK
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45
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MAP Kinase Cascades in Antigen Receptor Signaling and Physiology. Curr Top Microbiol Immunol 2015; 393:211-231. [PMID: 26275875 DOI: 10.1007/82_2015_481] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Mitogen-activated protein kinases (MAPKs) play roles in a cell type and context-dependent manner to convert extracellular stimuli to a variety of cellular responses, thereby directing cells to proliferation, differentiation, survival, apoptosis, and migration. Studies of genetically engineered mice or chemical inhibitors specific to each MAPK signaling pathway revealed that MAPKs have various, but non-redundant physiologically important roles among different families. MAPK cascades are obviously integrated in the B cell receptor signaling pathways as critical components to drive B cell-mediated immunity.
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Schaefer FM, Peng J, Hu W, Drvarov O, Nevzorova YA, Zhao G, Masaoudi MA, Davis RJ, Trautwein C, Cubero FJ. Bone marrow-derived c-jun N-terminal kinase-1 (JNK1) mediates liver regeneration. Biochim Biophys Acta Mol Basis Dis 2015; 1852:137-45. [DOI: 10.1016/j.bbadis.2014.10.011] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2014] [Revised: 10/10/2014] [Accepted: 10/15/2014] [Indexed: 01/24/2023]
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Sahoo A, Alekseev A, Obertas L, Nurieva R. Grail controls Th2 cell development by targeting STAT6 for degradation. Nat Commun 2014; 5:4732. [PMID: 25145352 PMCID: PMC5100808 DOI: 10.1038/ncomms5732] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2014] [Accepted: 07/17/2014] [Indexed: 12/21/2022] Open
Abstract
T helper (Th)-2 cells are the major players in allergic asthma; however, the mechanisms that control Th2-mediated inflammation are poorly understood. Here we find that enhanced expression of Grail, an E3 ubiquitin ligase, in Th2 cells depends on IL-4-signaling components, Stat6 and Gata3 that bind to and transactivate the Grail promoter. Grail-deficiency in T cells leads to increased expression of Th2 effector cytokines in vitro and in vivo and Grail deficient mice are more susceptible to allergic asthma. Mechanistically, the enhanced effector function of Grail-deficient Th2 cells is mediated by increased expression of Stat6 and IL-4 receptor α-chain. Grail interacts with Stat6 and targets it for ubiquitination and degradation. Thus, our results indicate that Grail plays a critical role in controlling Th2 development through a negative feedback loop.
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Affiliation(s)
- Anupama Sahoo
- Department of Immunology, M. D. Anderson Cancer Center, Houston, Texas 77030, USA
| | - Andrei Alekseev
- Department of Immunology, M. D. Anderson Cancer Center, Houston, Texas 77030, USA
| | - Lidiya Obertas
- Department of Immunology, M. D. Anderson Cancer Center, Houston, Texas 77030, USA
| | - Roza Nurieva
- Department of Immunology, M. D. Anderson Cancer Center, Houston, Texas 77030, USA
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48
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Wadosky KM, Rodríguez JE, Hite RL, Min JN, Walton BL, Willis MS. Muscle RING finger-1 attenuates IGF-I-dependent cardiomyocyte hypertrophy by inhibiting JNK signaling. Am J Physiol Endocrinol Metab 2014; 306:E723-39. [PMID: 24425758 PMCID: PMC3962608 DOI: 10.1152/ajpendo.00326.2013] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Recent studies implicate the muscle-specific ubiquitin ligase muscle RING finger-1 (MuRF1) in inhibiting pathological cardiomyocyte growth in vivo by inhibiting the transcription factor SRF. These studies led us to hypothesize that MuRF1 similarly inhibits insulin-like growth factor-I (IGF-I)-mediated physiological cardiomyocyte growth. We identified two lines of evidence to support this hypothesis: IGF-I stimulation of cardiac-derived cells with MuRF1 knockdown 1) exhibited an exaggerated hypertrophy and, 2) conversely, increased MuRF1 expression-abolished IGF-I-dependent cardiomyocyte growth. Enhanced hypertrophy with MuRF1 knockdown was accompanied by increases in Akt-regulated gene expression. Unexpectedly, MuRF1 inhibition of this gene expression profile was not a result of differences in p-Akt. Instead, we found that MuRF1 inhibits total protein levels of Akt, GSK-3β (downstream of Akt), and mTOR while limiting c-Jun protein expression, a mechanism recently shown to govern Akt, GSK-3β, and mTOR activities and expression. These findings establish that MuRF1 inhibits IGF-I signaling by restricting c-Jun activity, a novel mechanism recently identified in the context of ischemia-reperfusion injury. Since IGF-I regulates exercise-mediated physiological cardiac growth, we challenged MuRF1(-/-) and MuRF1-Tg+ mice and their wild-type sibling controls to 5 wk of voluntary wheel running. MuRF1(-/-) cardiac growth was increased significantly over wild-type control; conversely, the enhanced exercise-induced cardiac growth was lost in MuRF1-Tg+ animals. These studies demonstrate that MuRF1-dependent attenuation of IGF-I signaling via c-Jun is applicable in vivo and establish that further understanding of this novel mechanism may be crucial in the development of therapies targeting IGF-I signaling.
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Affiliation(s)
- Kristine M Wadosky
- Department of Pathology and Laboratory Medicine, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
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49
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Moraes-Vieira PM, Yore MM, Dwyer PM, Syed I, Aryal P, Kahn BB. RBP4 activates antigen-presenting cells, leading to adipose tissue inflammation and systemic insulin resistance. Cell Metab 2014; 19:512-26. [PMID: 24606904 PMCID: PMC4078000 DOI: 10.1016/j.cmet.2014.01.018] [Citation(s) in RCA: 196] [Impact Index Per Article: 19.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/30/2013] [Revised: 12/05/2013] [Accepted: 01/22/2014] [Indexed: 12/22/2022]
Abstract
Insulin resistance is a major cause of diabetes and is highly associated with adipose tissue (AT) inflammation in obesity. RBP4, a retinol transporter, is elevated in insulin resistance and contributes to increased diabetes risk. We aimed to determine the mechanisms for RBP4-induced insulin resistance. Here we show that RBP4 elevation causes AT inflammation by activating innate immunity that elicits an adaptive immune response. RBP4-overexpressing mice (RBP4-Ox) are insulin resistant and glucose intolerant and have increased AT macrophage and CD4 T cell infiltration. In RBP4-Ox, AT CD206(+) macrophages express proinflammatory markers and activate CD4 T cells while maintaining alternatively activated macrophage markers. These effects result from direct activation of AT antigen-presenting cells (APCs) by RBP4 through a JNK-dependent pathway. Transfer of RBP4-activated APCs into normal mice is sufficient to induce AT inflammation, insulin resistance, and glucose intolerance. Thus, RBP4 causes insulin resistance, at least partly, by activating AT APCs that induce CD4 T cell Th1 polarization and AT inflammation.
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Affiliation(s)
- Pedro M Moraes-Vieira
- Division of Endocrinology, Diabetes, and Metabolism, Department of Medicine, Beth Israel Deaconess Medical Center and Harvard Medical School, 330 Brookline Avenue, Boston, MA 02215, USA
| | - Mark M Yore
- Division of Endocrinology, Diabetes, and Metabolism, Department of Medicine, Beth Israel Deaconess Medical Center and Harvard Medical School, 330 Brookline Avenue, Boston, MA 02215, USA
| | - Peter M Dwyer
- Division of Endocrinology, Diabetes, and Metabolism, Department of Medicine, Beth Israel Deaconess Medical Center and Harvard Medical School, 330 Brookline Avenue, Boston, MA 02215, USA
| | - Ismail Syed
- Division of Endocrinology, Diabetes, and Metabolism, Department of Medicine, Beth Israel Deaconess Medical Center and Harvard Medical School, 330 Brookline Avenue, Boston, MA 02215, USA
| | - Pratik Aryal
- Division of Endocrinology, Diabetes, and Metabolism, Department of Medicine, Beth Israel Deaconess Medical Center and Harvard Medical School, 330 Brookline Avenue, Boston, MA 02215, USA
| | - Barbara B Kahn
- Division of Endocrinology, Diabetes, and Metabolism, Department of Medicine, Beth Israel Deaconess Medical Center and Harvard Medical School, 330 Brookline Avenue, Boston, MA 02215, USA.
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50
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Abstract
Caspase recruitment domain-containing membrane-associated guanylate kinase protein-1 (CARMA1), a member of the membrane associated guanylate kinase (MAGUK) family of kinases, is essential for T lymphocyte activation and proliferation via T-cell receptor (TCR) mediated NF-κB activation. Recent studies suggest a broader role for CARMA1 regulating other T-cell functions as well as a role in non-TCR-mediated signaling pathways important for lymphocyte development and functions. In addition, CARMA1 has been shown to be an important component in the pathogenesis of several human diseases. Thus, comprehensively defining its mechanisms of action and regulation could reveal novel therapeutic targets for T-cell-mediated diseases and lymphoproliferative disorders.
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Affiliation(s)
- Marly I Roche
- Pulmonary and Critical Care Unit and the Center for Immunology and Inflammatory Diseases, Massachusetts General Hospital and Harvard Medical School, Boston, MA 02114, USA
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