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de Pablo N, Meana C, Martínez‐García J, Martínez‐Vicente P, Albert M, Guerra S, Angulo A, Balsinde J, Balboa MA. Lipin-2 regulates the antiviral and anti-inflammatory responses to interferon. EMBO Rep 2023; 24:e57238. [PMID: 37929625 PMCID: PMC10702840 DOI: 10.15252/embr.202357238] [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: 03/24/2023] [Revised: 10/16/2023] [Accepted: 10/19/2023] [Indexed: 11/07/2023] Open
Abstract
Interferons (IFN) are crucial antiviral and immunomodulatory cytokines that exert their function through the regulation of a myriad of genes, many of which are not yet characterized. Here, we reveal that lipin-2, a phosphatidic acid phosphatase whose mutations produce an autoinflammatory syndrome known as Majeed syndrome in humans, is regulated by IFN in a STAT-1-dependent manner. Lipin-2 inhibits viral replication both in vitro and in vivo. Moreover, lipin-2 also acts as a regulator of inflammation in a viral context by reducing the signaling through TLR3 and the generation of ROS and release of mtDNA that ultimately activate the NLRP3 inflammasome. Inhibitors of mtDNA release from mitochondria restrict IL-1β production in lipin-2-deficient animals in a model of viral infection. Finally, analyses of databases from COVID-19 patients show that LPIN2 expression levels negatively correlate with the severity of the disease. Overall, these results uncover novel regulatory mechanisms of the IFN response driven by lipin-2 and open new perspectives for the future management of patients with LPIN2 mutations.
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Affiliation(s)
- Nagore de Pablo
- Instituto de Biología y Genética MolecularConsejo Superior de Investigaciones Científicas (CSIC)ValladolidSpain
| | - Clara Meana
- Instituto de Biología y Genética MolecularConsejo Superior de Investigaciones Científicas (CSIC)ValladolidSpain
- Centro de Investigación Biomédica en Red de Diabetes y Enfermedades Metabólicas Asociadas (CIBERDEM)Instituto de Salud Carlos IIIMadridSpain
| | - Javier Martínez‐García
- Instituto de Biología y Genética MolecularConsejo Superior de Investigaciones Científicas (CSIC)ValladolidSpain
- Centro de Investigación Biomédica en Red de Diabetes y Enfermedades Metabólicas Asociadas (CIBERDEM)Instituto de Salud Carlos IIIMadridSpain
| | - Pablo Martínez‐Vicente
- Immunology Unit, Department of Biomedical Sciences, Faculty of Medicine and Health SciencesUniversity of BarcelonaBarcelonaSpain
- Institut d'Investigacions Biomèdiques August Pi i SunyerBarcelonaSpain
| | - Manuel Albert
- Departamento de Medicina Preventiva y Salud Pública, Facultad de MedicinaUniversidad Autónoma de MadridMadridSpain
| | - Susana Guerra
- Departamento de Medicina Preventiva y Salud Pública, Facultad de MedicinaUniversidad Autónoma de MadridMadridSpain
| | - Ana Angulo
- Immunology Unit, Department of Biomedical Sciences, Faculty of Medicine and Health SciencesUniversity of BarcelonaBarcelonaSpain
- Institut d'Investigacions Biomèdiques August Pi i SunyerBarcelonaSpain
| | - Jesús Balsinde
- Instituto de Biología y Genética MolecularConsejo Superior de Investigaciones Científicas (CSIC)ValladolidSpain
- Centro de Investigación Biomédica en Red de Diabetes y Enfermedades Metabólicas Asociadas (CIBERDEM)Instituto de Salud Carlos IIIMadridSpain
| | - María A Balboa
- Instituto de Biología y Genética MolecularConsejo Superior de Investigaciones Científicas (CSIC)ValladolidSpain
- Centro de Investigación Biomédica en Red de Diabetes y Enfermedades Metabólicas Asociadas (CIBERDEM)Instituto de Salud Carlos IIIMadridSpain
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2
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Zhao JY, Yuan XK, Luo RZ, Wang LX, Gu W, Yamane D, Feng H. Phospholipase A and acyltransferase 4/retinoic acid receptor responder 3 at the intersection of tumor suppression and pathogen restriction. Front Immunol 2023; 14:1107239. [PMID: 37063830 PMCID: PMC10102619 DOI: 10.3389/fimmu.2023.1107239] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2022] [Accepted: 03/22/2023] [Indexed: 04/03/2023] Open
Abstract
Phospholipase A and acyltransferase (PLAAT) 4 is a class II tumor suppressor with phospholipid metabolizing abilities. It was characterized in late 2000s, and has since been referred to as ‘tazarotene-induced gene 3’ (TIG3) or ‘retinoic acid receptor responder 3’ (RARRES3) as a key downstream effector of retinoic acid signaling. Two decades of research have revealed the complexity of its function and regulatory roles in suppressing tumorigenesis. However, more recent findings have also identified PLAAT4 as a key anti-microbial effector enzyme acting downstream of interferon regulatory factor 1 (IRF1) and interferons (IFNs), favoring protection from virus and parasite infections. Unveiling the molecular mechanisms underlying its action may thus open new therapeutic avenues for the treatment of both cancer and infectious diseases. Herein, we aim to summarize a brief history of PLAAT4 discovery, its transcriptional regulation, and the potential mechanisms in tumor prevention and anti-pathogen defense, and discuss potential future directions of PLAAT4 research toward the development of therapeutic approaches targeting this enzyme with pleiotropic functions.
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Affiliation(s)
- Jian-Yong Zhao
- Hospital of Integrated Traditional Chinese and Western Medicine, Hebei University of Chinese Medicine, Cangzhou, Hebei, China
| | - Xiang-Kun Yuan
- Hospital of Integrated Traditional Chinese and Western Medicine, Hebei University of Chinese Medicine, Cangzhou, Hebei, China
| | - Rui-Zhen Luo
- Hospital of Integrated Traditional Chinese and Western Medicine, Hebei University of Chinese Medicine, Cangzhou, Hebei, China
| | - Li-Xin Wang
- Hospital of Integrated Traditional Chinese and Western Medicine, Hebei University of Chinese Medicine, Cangzhou, Hebei, China
| | - Wei Gu
- School of Medicine, Chongqing University, Chongqing, China
| | - Daisuke Yamane
- Department of Diseases and Infection, Tokyo Metropolitan Institute of Medical Science, Tokyo, Japan
- *Correspondence: Hui Feng, ; Daisuke Yamane,
| | - Hui Feng
- School of Medicine, Chongqing University, Chongqing, China
- *Correspondence: Hui Feng, ; Daisuke Yamane,
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3
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Duncan CJ, Skouboe MK, Howarth S, Hollensen AK, Chen R, Børresen ML, Thompson BJ, Stremenova Spegarova J, Hatton CF, Stæger FF, Andersen MK, Whittaker J, Paludan SR, Jørgensen SE, Thomsen MK, Mikkelsen JG, Heilmann C, Buhas D, Øbro NF, Bay JT, Marquart HV, de la Morena MT, Klejka JA, Hirschfeld M, Borgwardt L, Forss I, Masmas T, Poulsen A, Noya F, Rouleau G, Hansen T, Zhou S, Albrechtsen A, Alizadehfar R, Allenspach EJ, Hambleton S, Mogensen TH. Life-threatening viral disease in a novel form of autosomal recessive IFNAR2 deficiency in the Arctic. J Exp Med 2022; 219:e20212427. [PMID: 35442417 PMCID: PMC9026249 DOI: 10.1084/jem.20212427] [Citation(s) in RCA: 30] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2021] [Revised: 02/28/2022] [Accepted: 03/21/2022] [Indexed: 12/12/2022] Open
Abstract
Type I interferons (IFN-I) play a critical role in human antiviral immunity, as demonstrated by the exceptionally rare deleterious variants of IFNAR1 or IFNAR2. We investigated five children from Greenland, Canada, and Alaska presenting with viral diseases, including life-threatening COVID-19 or influenza, in addition to meningoencephalitis and/or hemophagocytic lymphohistiocytosis following live-attenuated viral vaccination. The affected individuals bore the same homozygous IFNAR2 c.157T>C, p.Ser53Pro missense variant. Although absent from reference databases, p.Ser53Pro occurred with a minor allele frequency of 0.034 in their Inuit ancestry. The serine to proline substitution prevented cell surface expression of IFNAR2 protein, small amounts of which persisted intracellularly in an aberrantly glycosylated state. Cells exclusively expressing the p.Ser53Pro variant lacked responses to recombinant IFN-I and displayed heightened vulnerability to multiple viruses in vitro-a phenotype rescued by wild-type IFNAR2 complementation. This novel form of autosomal recessive IFNAR2 deficiency reinforces the essential role of IFN-I in viral immunity. Further studies are warranted to assess the need for population screening.
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Affiliation(s)
- Christopher J.A. Duncan
- Clinical and Translational Research Institute, Immunity and Inflammation Theme, Newcastle University, Newcastle upon Tyne, UK
- The Newcastle upon Tyne Hospitals NHS Foundation Trust, Newcastle upon Tyne, UK
| | - Morten K. Skouboe
- Department of Biomedicine, Aarhus University, Aarhus, Denmark
- Department of Infectious Diseases, Aarhus University Hospital, Aarhus, Denmark
| | - Sophie Howarth
- Clinical and Translational Research Institute, Immunity and Inflammation Theme, Newcastle University, Newcastle upon Tyne, UK
| | - Anne K. Hollensen
- Department of Biomedicine, Aarhus University, Aarhus, Denmark
- Department of Infectious Diseases, Aarhus University Hospital, Aarhus, Denmark
| | - Rui Chen
- Clinical and Translational Research Institute, Immunity and Inflammation Theme, Newcastle University, Newcastle upon Tyne, UK
| | - Malene L. Børresen
- Department of Paediatrics and Adolescent Medicine, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark
- Department of Epidemiology Research, Statens Serum Institut, Copenhagen, Denmark
| | - Benjamin J. Thompson
- Clinical and Translational Research Institute, Immunity and Inflammation Theme, Newcastle University, Newcastle upon Tyne, UK
| | - Jarmila Stremenova Spegarova
- Clinical and Translational Research Institute, Immunity and Inflammation Theme, Newcastle University, Newcastle upon Tyne, UK
| | - Catherine F. Hatton
- Clinical and Translational Research Institute, Immunity and Inflammation Theme, Newcastle University, Newcastle upon Tyne, UK
| | - Frederik F. Stæger
- Section for Computational and RNA Biology, Department of Biology, University of Copenhagen, Copenhagen, Denmark
| | - Mette K. Andersen
- Novo Nordisk Foundation Center for Basic Metabolic Research, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - John Whittaker
- Clinical and Translational Research Institute, Immunity and Inflammation Theme, Newcastle University, Newcastle upon Tyne, UK
| | | | - Sofie E. Jørgensen
- Department of Biomedicine, Aarhus University, Aarhus, Denmark
- Department of Infectious Diseases, Aarhus University Hospital, Aarhus, Denmark
| | | | | | - Carsten Heilmann
- Department of Paediatrics and Adolescent Medicine, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark
- Medical Department, Pediatric Section, Dronning Ingrid Hospital, Nuuk, Greenland
| | - Daniela Buhas
- Division of Genetics, Department of Specialized Medicine, McGill University Health Centre, Montreal, Quebec, Canada
- Department of Human Genetics, McGill University, Montreal, Quebec, Canada
| | - Nina F. Øbro
- Department of Clinical Immunology, Copenhagen University Hospital, Copenhagen, Denmark
| | - Jakob T. Bay
- Department of Clinical Immunology, Copenhagen University Hospital, Copenhagen, Denmark
| | - Hanne V. Marquart
- Department of Clinical Immunology, Copenhagen University Hospital, Copenhagen, Denmark
| | - M. Teresa de la Morena
- Seattle Children’s Hospital, Seattle, WA
- Department of Pediatrics, University of Washington, Seattle, WA
| | | | | | - Line Borgwardt
- Center for Genomic Medicine, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark
| | - Isabel Forss
- Center for Genomic Medicine, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark
| | - Tania Masmas
- Department of Paediatrics and Adolescent Medicine, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark
| | - Anja Poulsen
- Department of Paediatrics and Adolescent Medicine, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark
| | - Francisco Noya
- Division of Allergy & Clinical Immunology, Montreal Children’s Hospital, Montreal General Hospital, McGill University, Montreal, Quebec, Canada
| | - Guy Rouleau
- The Neuro, Department of Neurology and Neurosurgery, McGill University, Montreal, Quebec, Canada
| | - Torben Hansen
- Novo Nordisk Foundation Center for Basic Metabolic Research, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Sirui Zhou
- Department of Human Genetics, McGill University, Montreal, Quebec, Canada
| | - Anders Albrechtsen
- Section for Computational and RNA Biology, Department of Biology, University of Copenhagen, Copenhagen, Denmark
| | - Reza Alizadehfar
- Division of Allergy & Clinical Immunology, Montreal Children’s Hospital, Montreal General Hospital, McGill University, Montreal, Quebec, Canada
| | - Eric J. Allenspach
- Department of Clinical Immunology, Copenhagen University Hospital, Copenhagen, Denmark
- Seattle Children’s Hospital, Seattle, WA
- Center for Immunity and Immunotherapies, Seattle Children’s Research Institute, Seattle, WA
- Brotman Baty Institute for Precision Medicine, Seattle, WA
| | - Sophie Hambleton
- Clinical and Translational Research Institute, Immunity and Inflammation Theme, Newcastle University, Newcastle upon Tyne, UK
- The Newcastle upon Tyne Hospitals NHS Foundation Trust, Newcastle upon Tyne, UK
| | - Trine H. Mogensen
- Department of Biomedicine, Aarhus University, Aarhus, Denmark
- Department of Infectious Diseases, Aarhus University Hospital, Aarhus, Denmark
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4
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Wang JC, Sun L. PD-1/PD-L1, MDSC Pathways, and Checkpoint Inhibitor Therapy in Ph(-) Myeloproliferative Neoplasm: A Review. Int J Mol Sci 2022; 23:ijms23105837. [PMID: 35628647 PMCID: PMC9143160 DOI: 10.3390/ijms23105837] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Revised: 05/17/2022] [Accepted: 05/19/2022] [Indexed: 11/23/2022] Open
Abstract
There has been significant progress in immune checkpoint inhibitor (CPI) therapy in many solid tumor types. However, only a single failed study has been published in treating Ph(-) myeloproliferative neoplasm (MPN). To make progress in CPI studies on this disease, herein, we review and summarize the mechanisms of activation of the PD-L1 promoter, which are as follows: (a) the extrinsic mechanism, which is activated by interferon gamma (IFN γ) by tumor infiltration lymphocytes (TIL) and NK cells; (b) the intrinsic mechanism of EGFR or PTEN loss resulting in the activation of the MAPK and AKT pathways and then stat 1 and 3 activation; and (c) 9p24 amplicon amplification, resulting in PD-L1 and Jak2 activation. We also review the literature and postulate that many of the failures of CPI therapy in MPN are likely due to excessive MDSC activities. We list all of the anti-MDSC agents, especially those with ruxolitinib, IMID compounds, and BTK inhibitors, which may be combined with CPI therapy in the future as part of clinical trials applying CPI therapy to Ph(-) MPN.
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5
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Brar HK, Roy G, Kanojia A, Madan E, Madhubala R, Muthuswami R. Chromatin-Remodeling Factor BRG1 Is a Negative Modulator of L. donovani in IFNγ Stimulated and Infected THP-1 Cells. Front Cell Infect Microbiol 2022; 12:860058. [PMID: 35433496 PMCID: PMC9011159 DOI: 10.3389/fcimb.2022.860058] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2022] [Accepted: 03/14/2022] [Indexed: 11/13/2022] Open
Abstract
Intracellular pathogens manipulate the host cell for their own survival by contributing to modifications of host epigenome, and thus, altering expression of genes involved in the pathogenesis. Both ATP-dependent chromatin remodeling complex and histone modifications has been shown to be involved in the activation of IFNγ responsive genes. Leishmania donovani is an intracellular pathogen that causes visceral leishmaniasis. The strategies employed by Leishmania donovani to modulate the host epigenome in order to overcome the host defense for their persistence has been worked out in this study. We show that L. donovani negatively affects BRG1, a catalytic subunit of mammalian SWI/SNF chromatin remodeling complex, to alter IFNγ induced host responses. We observed that L. donovani infection downregulates BRG1 expression both at transcript and protein levels in cells stimulated with IFNγ. We also observed a significant decrease in IFNγ responsive gene, Class II transactivator (CIITA), as well as its downstream genes, MHC-II (HLA-DR and HLA-DM). Also, the occupancy of BRG1 at CIITA promoters I and IV was disrupted. A reversal in CIITA expression and decreased parasite load was observed with BRG1 overexpression, thus, suggesting BRG1 is a potential negative regulator for the survival of intracellular parasites in an early phase of infection. We also observed a decrease in H3 acetylation at the promoters of CIITA, post parasite infection. Silencing of HDAC1, resulted in increased CIITA expression, and further decreased parasite load. Taken together, we suggest that intracellular parasites in an early phase of infection negatively regulates BRG1 by using host HDAC1 for its survival inside the host.
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Affiliation(s)
- Harsimran Kaur Brar
- Molecular Parasitology Laboratory, School of Life Sciences, Jawaharlal Nehru University, New Delhi, India
| | - Gargi Roy
- Molecular Parasitology Laboratory, School of Life Sciences, Jawaharlal Nehru University, New Delhi, India
| | - Akanksha Kanojia
- Chromatin Remodeling Laboratory, School of Life Sciences, Jawaharlal Nehru University, New Delhi, India
| | - Evanka Madan
- Molecular Parasitology Laboratory, School of Life Sciences, Jawaharlal Nehru University, New Delhi, India
| | - Rentala Madhubala
- Molecular Parasitology Laboratory, School of Life Sciences, Jawaharlal Nehru University, New Delhi, India
- *Correspondence: Rentala Madhubala, ; Rohini Muthuswami,
| | - Rohini Muthuswami
- Chromatin Remodeling Laboratory, School of Life Sciences, Jawaharlal Nehru University, New Delhi, India
- *Correspondence: Rentala Madhubala, ; Rohini Muthuswami,
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6
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Zhang X, Feng WH. Porcine Reproductive and Respiratory Syndrome Virus Evades Antiviral Innate Immunity via MicroRNAs Regulation. Front Microbiol 2022; 12:804264. [PMID: 34975824 PMCID: PMC8714953 DOI: 10.3389/fmicb.2021.804264] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Accepted: 11/23/2021] [Indexed: 12/15/2022] Open
Abstract
Porcine reproductive and respiratory syndrome (PRRS) is one of the most important diseases in pigs, leading to significant economic losses in the swine industry worldwide. MicroRNAs (miRNAs) are small single-stranded non-coding RNAs involved in regulating gene expressions at the post-transcriptional levels. A variety of host miRNAs are dysregulated and exploited by PRRSV to escape host antiviral surveillance and help virus infection. In addition, PRRSV might encode miRNAs. In this review, we will summarize current progress on how PRRSV utilizes miRNAs for immune evasions. Increasing knowledge of the role of miRNAs in immune evasion will improve our understanding of PRRSV pathogenesis and help us develop new treatments for PRRSV-associated diseases.
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Affiliation(s)
- Xuan Zhang
- State Key Laboratory of Agrobiotechnology, Ministry of Agriculture Key Laboratory of Soil Microbiology, Department of Microbiology and Immunology, College of Biological Sciences, China Agricultural University, Beijing, China
| | - Wen-Hai Feng
- State Key Laboratory of Agrobiotechnology, Ministry of Agriculture Key Laboratory of Soil Microbiology, Department of Microbiology and Immunology, College of Biological Sciences, China Agricultural University, Beijing, China
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7
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Duncan CJA, Hambleton S. Human Disease Phenotypes Associated with Loss and Gain of Function Mutations in STAT2: Viral Susceptibility and Type I Interferonopathy. J Clin Immunol 2021; 41:1446-1456. [PMID: 34448086 PMCID: PMC8390117 DOI: 10.1007/s10875-021-01118-z] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2021] [Accepted: 08/03/2021] [Indexed: 12/28/2022]
Abstract
STAT2 is distinguished from other STAT family members by its exclusive involvement in type I and III interferon (IFN-I/III) signaling pathways, and its unique behavior as both positive and negative regulator of IFN-I signaling. The clinical relevance of these opposing STAT2 functions is exemplified by monogenic diseases of STAT2. Autosomal recessive STAT2 deficiency results in heightened susceptibility to severe and/or recurrent viral disease, whereas homozygous missense substitution of the STAT2-R148 residue is associated with severe type I interferonopathy due to loss of STAT2 negative regulation. Here we review the clinical presentation, pathogenesis, and management of these disorders of STAT2.
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Affiliation(s)
- Christopher James Arthur Duncan
- Translational and Clinical Research Institute, Immunity and Inflammation Theme, Newcastle University, Newcastle upon Tyne, NE2 4HH, UK.
- Royal Victoria Infirmary, The Newcastle Upon Tyne Hospitals NHS Foundation Trust, NE1 4LP, Newcastle upon Tyne, UK.
| | - Sophie Hambleton
- Translational and Clinical Research Institute, Immunity and Inflammation Theme, Newcastle University, Newcastle upon Tyne, NE2 4HH, UK
- Great North Children's Hospital, The Newcastle Upon Tyne Hospitals NHS Foundation Trust, NE1 4LP, Newcastle upon Tyne, UK
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8
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Wang M, Zhai X, Li J, Guan J, Xu S, Li Y, Zhu H. The Role of Cytokines in Predicting the Response and Adverse Events Related to Immune Checkpoint Inhibitors. Front Immunol 2021; 12:670391. [PMID: 34367136 PMCID: PMC8339552 DOI: 10.3389/fimmu.2021.670391] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2021] [Accepted: 07/05/2021] [Indexed: 12/14/2022] Open
Abstract
Recently, the overall survival (OS) and progression-free survival (PFS) of patients with advanced cancer has been significantly improved due to the application of immune checkpoint inhibitors (ICIs). Low response rate and high occurrence of immune-related adverse events (irAEs) make urgently need for ideal predictive biomarkers to identity efficient population and guide treatment strategies. Cytokines are small soluble proteins with a wide range of biological activity that are secreted by activated immune cells or tumor cells and act as a bridge between innate immunity, infection, inflammation and cancer. Cytokines can be detected in peripheral blood and suitable for dynamic detection. During the era of ICIs, many studies investigated the role of cytokines in prediction of the efficiency and toxicity of ICIs. Herein, we review the relevant studies on TNF-α, IFN-γ, IL-6, IL-8, TGF-β and other cytokines as biomarkers for predicting ICI-related reactions and adverse events, and explore the immunomodulatory mechanisms. Finally, the most important purpose of this review is to help identify predictors of ICI to screen patients who are most likely to benefit from immunotherapy.
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Affiliation(s)
- Min Wang
- Department of Radiation Oncology, Shandong Cancer Hospital and Institute, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, China
| | - Xiaoyang Zhai
- Department of Radiation Oncology, Shandong Cancer Hospital and Institute, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, China
| | - Ji Li
- Department of Radiation Oncology, Shandong Cancer Hospital and Institute, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, China
| | - Jingyuan Guan
- Department of Cardiology, Qilu Hospital Affiliated to Shandong University, Jinan, China
| | - Shuhui Xu
- Department of Radiation Oncology, Shandong Cancer Hospital and Institute, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, China
| | - YuYing Li
- Department of Radiation Oncology, Shandong Cancer Hospital and Institute, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, China
| | - Hui Zhu
- Department of Radiation Oncology, Shandong Cancer Hospital and Institute, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, China
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9
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Kishimoto K, Wilder CL, Buchanan J, Nguyen M, Okeke C, Hoffmann A, Cheng QJ. High Dose IFN- β Activates GAF to Enhance Expression of ISGF3 Target Genes in MLE12 Epithelial Cells. Front Immunol 2021; 12:651254. [PMID: 33897699 PMCID: PMC8062733 DOI: 10.3389/fimmu.2021.651254] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2021] [Accepted: 03/19/2021] [Indexed: 12/13/2022] Open
Abstract
Interferon β (IFN-β) signaling activates the transcription factor complex ISGF3 to induce gene expression programs critical for antiviral defense and host immune responses. It has also been observed that IFN-β activates a second transcription factor complex, γ-activated factor (GAF), but the significance of this coordinated activation is unclear. We report that in murine lung epithelial cells (MLE12) high doses of IFN-β indeed activate both ISGF3 and GAF, which bind to distinct genomic locations defined by their respective DNA sequence motifs. In contrast, low doses of IFN-β preferentially activate ISGF3 but not GAF. Surprisingly, in MLE12 cells GAF binding does not induce nearby gene expression even when strongly bound to the promoter. Yet expression of interferon stimulated genes is enhanced when GAF and ISGF3 are both active compared to ISGF3 alone. We propose that GAF may function as a dose-sensitive amplifier of ISG expression to enhance antiviral immunity and establish pro-inflammatory states.
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Affiliation(s)
- Kensei Kishimoto
- Institute for Quantitative and Computational Biosciences, University of California Los Angeles, Los Angeles, CA, United States.,Department of Chemistry and Biochemistry, University of California Los Angeles, Los Angeles, CA, United States
| | - Catera L Wilder
- Department of Microbiology, Immunology, and Molecular Genetics, University of California Los Angeles, Los Angeles, CA, United States
| | - Justin Buchanan
- Department of Microbiology, Immunology, and Molecular Genetics, University of California Los Angeles, Los Angeles, CA, United States
| | - Minh Nguyen
- Institute for Quantitative and Computational Biosciences, University of California Los Angeles, Los Angeles, CA, United States.,Department of Microbiology, Immunology, and Molecular Genetics, University of California Los Angeles, Los Angeles, CA, United States
| | - Chidera Okeke
- Institute for Quantitative and Computational Biosciences, University of California Los Angeles, Los Angeles, CA, United States.,Department of Life and Physical Sciences, Fisk University, Nashville, TN, United States
| | - Alexander Hoffmann
- Institute for Quantitative and Computational Biosciences, University of California Los Angeles, Los Angeles, CA, United States.,Department of Microbiology, Immunology, and Molecular Genetics, University of California Los Angeles, Los Angeles, CA, United States
| | - Quen J Cheng
- Department of Microbiology, Immunology, and Molecular Genetics, University of California Los Angeles, Los Angeles, CA, United States.,Department of Medicine, Division of Infectious Diseases, David Geffen School of Medicine, University of California, Los Angeles, CA, United States
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10
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Role of NLRs in the Regulation of Type I Interferon Signaling, Host Defense and Tolerance to Inflammation. Int J Mol Sci 2021; 22:ijms22031301. [PMID: 33525590 PMCID: PMC7865845 DOI: 10.3390/ijms22031301] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Revised: 01/22/2021] [Accepted: 01/26/2021] [Indexed: 12/12/2022] Open
Abstract
Type I interferon signaling contributes to the development of innate and adaptive immune responses to either viruses, fungi, or bacteria. However, amplitude and timing of the interferon response is of utmost importance for preventing an underwhelming outcome, or tissue damage. While several pathogens evolved strategies for disturbing the quality of interferon signaling, there is growing evidence that this pathway can be regulated by several members of the Nod-like receptor (NLR) family, although the precise mechanism for most of these remains elusive. NLRs consist of a family of about 20 proteins in mammals, which are capable of sensing microbial products as well as endogenous signals related to tissue injury. Here we provide an overview of our current understanding of the function of those NLRs in type I interferon responses with a focus on viral infections. We discuss how NLR-mediated type I interferon regulation can influence the development of auto-immunity and the immune response to infection.
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11
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Lv H, Lv G, Chen C, Zong Q, Jiang G, Ye D, Cui X, He Y, Xiang W, Han Q, Tang L, Yang W, Wang H. NAD + Metabolism Maintains Inducible PD-L1 Expression to Drive Tumor Immune Evasion. Cell Metab 2021; 33:110-127.e5. [PMID: 33171124 DOI: 10.1016/j.cmet.2020.10.021] [Citation(s) in RCA: 118] [Impact Index Per Article: 39.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/18/2019] [Revised: 08/04/2020] [Accepted: 10/21/2020] [Indexed: 12/16/2022]
Abstract
NAD+ metabolism is implicated in aging and cancer. However, its role in immune checkpoint regulation and immune evasion remains unclear. Here, we find nicotinamide phosphoribosyltransferase (NAMPT), the rate-limiting enzyme of the NAD+ biogenesis, drives interferon γ (IFNγ)-induced PD-L1 expression in multiple types of tumors and governs tumor immune evasion in a CD8+ T cell-dependent manner. Mechanistically, NAD+ metabolism maintains activity and expression of methylcytosine dioxygenase Tet1 via α-ketoglutarate (α-KG). IFNγ-activated Stat1 facilitates Tet1 binding to Irf1 to regulate Irf1 demethylation, leading to downstream PD-L1 expression on tumors. Importantly, high NAMPT-expressing tumors are more sensitive to anti-PD-L1 treatment and NAD+ augmentation enhances the efficacy of anti-PD-L1 antibody in immunotherapy-resistant tumors. Collectively, these data delineate an NAD+ metabolism-dependent epigenetic mechanism contributing to tumor immune evasion, and NAD+ replenishment combined with PD-(L)1 antibody provides a promising therapeutic strategy for immunotherapy-resistant tumors.
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Affiliation(s)
- Hongwei Lv
- International Co-operation Laboratory on Signal Transduction, Eastern Hepatobiliary Surgery Hospital, Second Military Medical University, Shanghai 200438, China; National Center for Liver Cancer, Second Military Medical University, Shanghai 201805, China; Shanghai Key Laboratory of Hepato-biliary Tumor Biology, Shanghai 200438, China
| | - Guishuai Lv
- International Co-operation Laboratory on Signal Transduction, Eastern Hepatobiliary Surgery Hospital, Second Military Medical University, Shanghai 200438, China; National Center for Liver Cancer, Second Military Medical University, Shanghai 201805, China; Ministry of Education Key Laboratory on Signaling Regulation and Targeting Therapy of Liver Cancer, Shanghai 200438, China
| | - Cian Chen
- International Co-operation Laboratory on Signal Transduction, Eastern Hepatobiliary Surgery Hospital, Second Military Medical University, Shanghai 200438, China; National Center for Liver Cancer, Second Military Medical University, Shanghai 201805, China
| | - Qianni Zong
- International Co-operation Laboratory on Signal Transduction, Eastern Hepatobiliary Surgery Hospital, Second Military Medical University, Shanghai 200438, China; National Center for Liver Cancer, Second Military Medical University, Shanghai 201805, China
| | - Guoqing Jiang
- Department of Hepatobiliary Surgery, Clinical Medical College, Yangzhou University, Yangzhou, Jiangsu 225000, China
| | - Dan Ye
- Molecular and Cell Biology Lab, Institute of Biomedical Sciences, Shanghai Medical College, Fudan University, Shanghai 200032, China
| | - Xiuliang Cui
- International Co-operation Laboratory on Signal Transduction, Eastern Hepatobiliary Surgery Hospital, Second Military Medical University, Shanghai 200438, China; National Center for Liver Cancer, Second Military Medical University, Shanghai 201805, China
| | - Yufei He
- International Co-operation Laboratory on Signal Transduction, Eastern Hepatobiliary Surgery Hospital, Second Military Medical University, Shanghai 200438, China; National Center for Liver Cancer, Second Military Medical University, Shanghai 201805, China
| | - Wei Xiang
- Cancer Research Center, First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui 230027, China
| | - Qin Han
- International Co-operation Laboratory on Signal Transduction, Eastern Hepatobiliary Surgery Hospital, Second Military Medical University, Shanghai 200438, China; National Center for Liver Cancer, Second Military Medical University, Shanghai 201805, China
| | - Liang Tang
- International Co-operation Laboratory on Signal Transduction, Eastern Hepatobiliary Surgery Hospital, Second Military Medical University, Shanghai 200438, China; National Center for Liver Cancer, Second Military Medical University, Shanghai 201805, China
| | - Wen Yang
- International Co-operation Laboratory on Signal Transduction, Eastern Hepatobiliary Surgery Hospital, Second Military Medical University, Shanghai 200438, China; National Center for Liver Cancer, Second Military Medical University, Shanghai 201805, China.
| | - Hongyang Wang
- International Co-operation Laboratory on Signal Transduction, Eastern Hepatobiliary Surgery Hospital, Second Military Medical University, Shanghai 200438, China; National Center for Liver Cancer, Second Military Medical University, Shanghai 201805, China; Cancer Research Center, First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui 230027, China; Fudan University Shanghai Cancer Center, Shanghai 200032, China.
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12
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Duncan CJA, Randall RE, Hambleton S. Genetic Lesions of Type I Interferon Signalling in Human Antiviral Immunity. Trends Genet 2021; 37:46-58. [PMID: 32977999 PMCID: PMC7508017 DOI: 10.1016/j.tig.2020.08.017] [Citation(s) in RCA: 49] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2020] [Revised: 08/08/2020] [Accepted: 08/20/2020] [Indexed: 12/13/2022]
Abstract
The concept that type I interferons (IFN-I) are essential to antiviral immunity derives from studies on animal models and cell lines. Virtually all pathogenic viruses have evolved countermeasures to IFN-I restriction, and genetic loss of viral IFN-I antagonists leads to virus attenuation. But just how important is IFN-I to antiviral defence in humans? The recent discovery of genetic defects of IFN-I signalling illuminates this and other questions of IFN biology, including the role of the mucosa-restricted type III IFNs (IFN-III), informing our understanding of the place of the IFN system within the concerted antiviral response. Here we review monogenic lesions of IFN-I signalling pathways and summarise the organising principles which emerge.
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Affiliation(s)
- Christopher J A Duncan
- Translational and Clinical Research Institute, Immunity and Inflammation Theme, Newcastle University, Newcastle upon Tyne NE2 4HH, UK; Royal Victoria Infirmary, Newcastle upon Tyne Hospitals NHS Foundation Trust, Newcastle upon Tyne NE1 4LP, UK.
| | - Richard E Randall
- School of Biology, University of St Andrew's, St Andrew's KY16 9ST, UK
| | - Sophie Hambleton
- Translational and Clinical Research Institute, Immunity and Inflammation Theme, Newcastle University, Newcastle upon Tyne NE2 4HH, UK; Great North Children's Hospital, Newcastle upon Tyne Hospitals NHS Foundation Trust, Newcastle upon Tyne NE1 4LP, UK
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13
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Ahmad I, Valverde A, Siddiqui H, Schaller S, Naqvi AR. Viral MicroRNAs: Interfering the Interferon Signaling. Curr Pharm Des 2020; 26:446-454. [PMID: 31924149 DOI: 10.2174/1381612826666200109181238] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2019] [Accepted: 12/22/2019] [Indexed: 12/23/2022]
Abstract
Interferons are secreted cytokines with potent antiviral, antitumor and immunomodulatory functions. As the first line of defense against viruses, this pathway restricts virus infection and spread. On the contrary, viruses have evolved ingenious strategies to evade host immune responses including the interferon pathway. Multiple families of viruses, in particular, DNA viruses, encode microRNA (miR) that are small, non-protein coding, regulatory RNAs. Virus-derived miRNAs (v-miR) function by targeting host and virus-encoded transcripts and are critical in shaping host-pathogen interaction. The role of v-miRs in viral pathogenesis is emerging as demonstrated by their function in subverting host defense mechanisms and regulating fundamental biological processes such as cell survival, proliferation, modulation of viral life-cycle phase. In this review, we will discuss the role of v-miRs in the suppression of host genes involved in the viral nucleic acid detection, JAK-STAT pathway, and cytokine-mediated antiviral gene activation to favor viral replication and persistence. This information has yielded new insights into our understanding of how v-miRs promote viral evasion of host immunity and likely provide novel antiviral therapeutic targets.
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Affiliation(s)
- Imran Ahmad
- Mucosal Immunology Lab, College of Dentistry, University of Illinois at Chicago, Chicago, Illinois, IL 60612, United States
| | - Araceli Valverde
- Mucosal Immunology Lab, College of Dentistry, University of Illinois at Chicago, Chicago, Illinois, IL 60612, United States
| | - Hasan Siddiqui
- Mucosal Immunology Lab, College of Dentistry, University of Illinois at Chicago, Chicago, Illinois, IL 60612, United States
| | - Samantha Schaller
- Mucosal Immunology Lab, College of Dentistry, University of Illinois at Chicago, Chicago, Illinois, IL 60612, United States
| | - Afsar R Naqvi
- Mucosal Immunology Lab, College of Dentistry, University of Illinois at Chicago, Chicago, Illinois, IL 60612, United States
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14
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Shourian M, Beltra JC, Bourdin B, Decaluwe H. Common gamma chain cytokines and CD8 T cells in cancer. Semin Immunol 2020; 42:101307. [PMID: 31604532 DOI: 10.1016/j.smim.2019.101307] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/19/2019] [Indexed: 12/20/2022]
Abstract
Overcoming exhaustion-associated dysfunctions and generating antigen-specific CD8 T cells with the ability to persist in the host and mediate effective long-term anti-tumor immunity is the final aim of cancer immunotherapy. To achieve this goal, immuno-modulatory properties of the common gamma-chain (γc) family of cytokines, that includes IL-2, IL-7, IL-15 and IL-21, have been used to fine-tune and/or complement current immunotherapeutic protocols. These agents potentiate CD8 T cell expansion and functions particularly in the context of immune checkpoint (IC) blockade, shape their differentiation, improve their persistence in vivo and alternatively, influence distinct aspects of the T cell exhaustion program. Despite these properties, the intrinsic impact of cytokines on CD8 T cell exhaustion has remained largely unexplored impeding optimal therapeutic use of these agents. In this review, we will discuss current knowledge regarding the influence of relevant γc cytokines on CD8 T cell differentiation and function based on clinical data and preclinical studies in murine models of cancer and chronic viral infection. We will restate the place of these agents in current immunotherapeutic regimens such as IC checkpoint blockade and adoptive cell therapy. Finally, we will discuss how γc cytokine signaling pathways regulate T cell immunity during cancer and whether targeting these pathways may sustain an effective and durable T cell response in patients.
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Affiliation(s)
- Mitra Shourian
- Cytokines and Adaptive Immunity Laboratory, CHU Sainte-Justine Research Center, Montreal, Quebec, Canada; Department of Microbiology and Immunology, Faculty of Medicine, University of Montreal, Montreal, Quebec, Canada
| | - Jean-Christophe Beltra
- Department of Systems Pharmacology and Translational Therapeutics, University of Pennsylvania, Philadelphia, PA, USA; Institute for Immunology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Benoîte Bourdin
- Cytokines and Adaptive Immunity Laboratory, CHU Sainte-Justine Research Center, Montreal, Quebec, Canada
| | - Hélène Decaluwe
- Cytokines and Adaptive Immunity Laboratory, CHU Sainte-Justine Research Center, Montreal, Quebec, Canada; Department of Microbiology and Immunology, Faculty of Medicine, University of Montreal, Montreal, Quebec, Canada; Immunology and Rheumatology Division, Department of Pediatrics, Faculty of Medicine, University of Montreal, Montreal, Quebec, Canada.
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15
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Ashley CL, Abendroth A, McSharry BP, Slobedman B. Interferon-Independent Innate Responses to Cytomegalovirus. Front Immunol 2019; 10:2751. [PMID: 31921100 PMCID: PMC6917592 DOI: 10.3389/fimmu.2019.02751] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2019] [Accepted: 11/11/2019] [Indexed: 12/28/2022] Open
Abstract
The critical role of interferons (IFNs) in mediating the innate immune response to cytomegalovirus (CMV) infection is well established. However, in recent years the functional importance of the IFN-independent antiviral response has become clearer. IFN-independent, IFN regulatory factor 3 (IRF3)-dependent interferon-stimulated gene (ISG) regulation in the context of CMV infection was first documented 20 years ago. Since then several IFN-independent, IRF3-dependent ISGs have been characterized and found to be among the most influential in the innate response to CMV. These include virus inhibitory protein, endoplasmic reticulum-associated IFN-inducible (viperin), ISG15, members of the interferon inducible protein with tetratricopeptide repeats (IFIT) family, interferon-inducible transmembrane (IFITM) proteins and myxovirus resistance proteins A and B (MxA, MxB). IRF3-independent, IFN-independent activation of canonically IFN-dependent signaling pathways has also been documented, such as IFN-independent biphasic activation of signal transducer and activator of transcription 1 (STAT1) during infection of monocytes, differential roles of mitochondrial and peroxisomal mitochondrial antiviral-signaling protein (MAVS), and the ability of human CMV (HCMV) immediate early protein 1 (IE1) protein to reroute IL-6 signaling and activation of STAT1 and its associated ISGs. This review examines the role of identified IFN-independent ISGs in the antiviral response to CMV and describes pathways of IFN-independent innate immune response induction by CMV.
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Affiliation(s)
- Caroline L Ashley
- Discipline of Infectious Diseases and Immunology, Faculty of Medicine and Health, Charles Perkins Centre, University of Sydney, Camperdown, NSW, Australia
| | - Allison Abendroth
- Discipline of Infectious Diseases and Immunology, Faculty of Medicine and Health, Charles Perkins Centre, University of Sydney, Camperdown, NSW, Australia
| | - Brian P McSharry
- Discipline of Infectious Diseases and Immunology, Faculty of Medicine and Health, Charles Perkins Centre, University of Sydney, Camperdown, NSW, Australia.,School of Microbiology, University College Cork, Cork, Ireland.,APC Microbiome Ireland, University College Cork, Cork, Ireland
| | - Barry Slobedman
- Discipline of Infectious Diseases and Immunology, Faculty of Medicine and Health, Charles Perkins Centre, University of Sydney, Camperdown, NSW, Australia
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16
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Friedrich M, Jasinski-Bergner S, Lazaridou MF, Subbarayan K, Massa C, Tretbar S, Mueller A, Handke D, Biehl K, Bukur J, Donia M, Mandelboim O, Seliger B. Tumor-induced escape mechanisms and their association with resistance to checkpoint inhibitor therapy. Cancer Immunol Immunother 2019; 68:1689-1700. [PMID: 31375885 DOI: 10.1007/s00262-019-02373-1] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2019] [Accepted: 07/28/2019] [Indexed: 12/19/2022]
Abstract
Immunotherapy aims to activate the immune system to fight cancer in a very specific and targeted manner. Despite the success of different immunotherapeutic strategies, in particular antibodies directed against checkpoints as well as adoptive T-cell therapy, the response of patients is limited in different types of cancers. This attributes to escape of the tumor from immune surveillance and development of acquired resistances during therapy. In this review, the different evasion and resistance mechanisms that limit the efficacy of immunotherapies targeting tumor-associated antigens presented by major histocompatibility complex molecules on the surface of the malignant cells are summarized. Overcoming these escape mechanisms is a great challenge, but might lead to a better clinical outcome of patients and is therefore currently a major focus of research.
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Affiliation(s)
- Michael Friedrich
- Institute of Medical Immunology, Martin Luther University Halle-Wittenberg, Magdeburger Straße 2, 06110, Halle (Saale), Germany
| | - Simon Jasinski-Bergner
- Institute of Medical Immunology, Martin Luther University Halle-Wittenberg, Magdeburger Straße 2, 06110, Halle (Saale), Germany
| | - Maria-Filothei Lazaridou
- Institute of Medical Immunology, Martin Luther University Halle-Wittenberg, Magdeburger Straße 2, 06110, Halle (Saale), Germany
| | - Karthikeyan Subbarayan
- Institute of Medical Immunology, Martin Luther University Halle-Wittenberg, Magdeburger Straße 2, 06110, Halle (Saale), Germany
| | - Chiara Massa
- Institute of Medical Immunology, Martin Luther University Halle-Wittenberg, Magdeburger Straße 2, 06110, Halle (Saale), Germany
| | - Sandy Tretbar
- Institute of Medical Immunology, Martin Luther University Halle-Wittenberg, Magdeburger Straße 2, 06110, Halle (Saale), Germany
| | - Anja Mueller
- Institute of Medical Immunology, Martin Luther University Halle-Wittenberg, Magdeburger Straße 2, 06110, Halle (Saale), Germany
| | - Diana Handke
- Institute of Medical Immunology, Martin Luther University Halle-Wittenberg, Magdeburger Straße 2, 06110, Halle (Saale), Germany
| | - Katharina Biehl
- Institute of Medical Immunology, Martin Luther University Halle-Wittenberg, Magdeburger Straße 2, 06110, Halle (Saale), Germany
| | - Jürgen Bukur
- Institute of Medical Immunology, Martin Luther University Halle-Wittenberg, Magdeburger Straße 2, 06110, Halle (Saale), Germany
| | - Marco Donia
- Department of Oncology, Herlev Hospital, University of Copenhagen, Herlev, Denmark
| | - Ofer Mandelboim
- Department of Immunology, Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Barbara Seliger
- Institute of Medical Immunology, Martin Luther University Halle-Wittenberg, Magdeburger Straße 2, 06110, Halle (Saale), Germany.
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17
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Taft J, Bogunovic D. The Goldilocks Zone of Type I IFNs: Lessons from Human Genetics. THE JOURNAL OF IMMUNOLOGY 2019; 201:3479-3485. [PMID: 30530500 DOI: 10.4049/jimmunol.1800764] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2018] [Accepted: 08/15/2018] [Indexed: 12/27/2022]
Abstract
Type I IFNs (IFN-Is) are powerful cytokines. They provide remarkable protection against viral infections, but their indiscriminate production causes severe self-inflicted damage that can be lethal, particularly in early development. In humans, inappropriately high IFN-I levels caused by defects in the regulatory mechanisms that control IFN-I production and response result in clinical conditions known as type I interferonopathies. In essence, type I interferonopathies define the upper limit of safe, IFN-related inflammation in vivo. Conversely, the loss of IFN-I responsiveness increases susceptibility to viral infections, but, surprisingly, most affected individuals survive despite these inborn errors of immunity. These findings suggest that too much IFN-I early in life is toxic, but that insensitivity to IFN-I is perhaps not the death sentence it was initially thought to be. Human genetic analyses have suggested that seemingly insignificant levels of IFN-regulated gene activity may be sufficient for most of the antiviral defenses used by humans in natura.
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Affiliation(s)
- Justin Taft
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY 10029; Department of Pediatrics, Icahn School of Medicine at Mount Sinai, New York, NY 10029; and The Mindich Child Health and Development Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029
| | - Dusan Bogunovic
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY 10029; Department of Pediatrics, Icahn School of Medicine at Mount Sinai, New York, NY 10029; and The Mindich Child Health and Development Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029
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18
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Michalska A, Blaszczyk K, Wesoly J, Bluyssen HAR. A Positive Feedback Amplifier Circuit That Regulates Interferon (IFN)-Stimulated Gene Expression and Controls Type I and Type II IFN Responses. Front Immunol 2018; 9:1135. [PMID: 29892288 PMCID: PMC5985295 DOI: 10.3389/fimmu.2018.01135] [Citation(s) in RCA: 179] [Impact Index Per Article: 29.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2018] [Accepted: 05/07/2018] [Indexed: 12/14/2022] Open
Abstract
Interferon (IFN)-I and IFN-II both induce IFN-stimulated gene (ISG) expression through Janus kinase (JAK)-dependent phosphorylation of signal transducer and activator of transcription (STAT) 1 and STAT2. STAT1 homodimers, known as γ-activated factor (GAF), activate transcription in response to all types of IFNs by direct binding to IFN-II activation site (γ-activated sequence)-containing genes. Association of interferon regulatory factor (IRF) 9 with STAT1–STAT2 heterodimers [known as interferon-stimulated gene factor 3 (ISGF3)] or with STAT2 homodimers (STAT2/IRF9) in response to IFN-I, redirects these complexes to a distinct group of target genes harboring the interferon-stimulated response element (ISRE). Similarly, IRF1 regulates expression of ISGs in response to IFN-I and IFN-II by directly binding the ISRE or IRF-responsive element. In addition, evidence is accumulating for an IFN-independent and -dependent role of unphosphorylated STAT1 and STAT2, with or without IRF9, and IRF1 in basal as well as long-term ISG expression. This review provides insight into the existence of an intracellular amplifier circuit regulating ISG expression and controlling long-term cellular responsiveness to IFN-I and IFN-II. The exact timely steps that take place during IFN-activated feedback regulation and the control of ISG transcription and long-term cellular responsiveness to IFN-I and IFN-II is currently not clear. Based on existing literature and our novel data, we predict the existence of a multifaceted intracellular amplifier circuit that depends on unphosphorylated and phosphorylated ISGF3 and GAF complexes and IRF1. In a combinatorial and timely fashion, these complexes mediate prolonged ISG expression and control cellular responsiveness to IFN-I and IFN-II. This proposed intracellular amplifier circuit also provides a molecular explanation for the existing overlap between IFN-I and IFN-II activated ISG expression.
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Affiliation(s)
- Agata Michalska
- Department of Human Molecular Genetics, Faculty of Biology, Institute of Molecular Biology and Biotechnology, Adam Mickiewicz University, Poznan, Poland
| | - Katarzyna Blaszczyk
- Department of Human Molecular Genetics, Faculty of Biology, Institute of Molecular Biology and Biotechnology, Adam Mickiewicz University, Poznan, Poland
| | - Joanna Wesoly
- Laboratory of High Throughput Technologies, Faculty of Biology, Institute of Molecular Biology and Biotechnology, Adam Mickiewicz University, Poznan, Poland
| | - Hans A R Bluyssen
- Department of Human Molecular Genetics, Faculty of Biology, Institute of Molecular Biology and Biotechnology, Adam Mickiewicz University, Poznan, Poland
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19
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Castro F, Cardoso AP, Gonçalves RM, Serre K, Oliveira MJ. Interferon-Gamma at the Crossroads of Tumor Immune Surveillance or Evasion. Front Immunol 2018; 9:847. [PMID: 29780381 PMCID: PMC5945880 DOI: 10.3389/fimmu.2018.00847] [Citation(s) in RCA: 703] [Impact Index Per Article: 117.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2017] [Accepted: 04/05/2018] [Indexed: 12/15/2022] Open
Abstract
Interferon-gamma (IFN-γ) is a pleiotropic molecule with associated antiproliferative, pro-apoptotic and antitumor mechanisms. This effector cytokine, often considered as a major effector of immunity, has been used in the treatment of several diseases, despite its adverse effects. Although broad evidence implicating IFN-γ in tumor immune surveillance, IFN-γ-based therapies undergoing clinical trials have been of limited success. In fact, recent reports suggested that it may also play a protumorigenic role, namely, through IFN-γ signaling insensitivity, downregulation of major histocompatibility complexes, and upregulation of indoleamine 2,3-dioxygenase and of checkpoint inhibitors, as programmed cell-death ligand 1. However, the IFN-γ-mediated responses are still positively associated with patient's survival in several cancers. Consequently, major research efforts are required to understand the immune contexture in which IFN-γ induces its intricate and highly regulated effects in the tumor microenvironment. This review discusses the current knowledge on the pro- and antitumorigenic effects of IFN-γ as part of the complex immune response to cancer, highlighting the relevance to identify IFN-γ responsive patients for the improvement of therapies that exploit associated signaling pathways.
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Affiliation(s)
- Flávia Castro
- i3S – Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal
- INEB – Instituto de Engenharia Biomédica, Universidade do Porto, Porto, Portugal
- ICBAS – Instituto de Ciências Biomédicas Abel Salazar, Universidade do Porto, Porto, Portugal
| | - Ana Patrícia Cardoso
- i3S – Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal
- INEB – Instituto de Engenharia Biomédica, Universidade do Porto, Porto, Portugal
| | - Raquel Madeira Gonçalves
- i3S – Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal
- INEB – Instituto de Engenharia Biomédica, Universidade do Porto, Porto, Portugal
- ICBAS – Instituto de Ciências Biomédicas Abel Salazar, Universidade do Porto, Porto, Portugal
| | - Karine Serre
- IMM – Instituto de Medicina Molecular João Lobo Antunes, Faculdade de Medicina, Universidade de Lisboa, Lisbon, Portugal
| | - Maria José Oliveira
- i3S – Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal
- INEB – Instituto de Engenharia Biomédica, Universidade do Porto, Porto, Portugal
- Departamento de Patologia e Oncologia, Faculdade de Medicina, Universidade do Porto, Porto, Portugal
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20
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Garcia-Diaz A, Shin DS, Moreno BH, Saco J, Escuin-Ordinas H, Rodriguez GA, Zaretsky JM, Sun L, Hugo W, Wang X, Parisi G, Saus CP, Torrejon DY, Graeber TG, Comin-Anduix B, Hu-Lieskovan S, Damoiseaux R, Lo RS, Ribas A. Interferon Receptor Signaling Pathways Regulating PD-L1 and PD-L2 Expression. Cell Rep 2018; 19:1189-1201. [PMID: 28494868 PMCID: PMC6420824 DOI: 10.1016/j.celrep.2017.04.031] [Citation(s) in RCA: 1137] [Impact Index Per Article: 189.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2016] [Revised: 12/23/2016] [Accepted: 04/12/2017] [Indexed: 12/11/2022] Open
Abstract
PD-L1 and PD-L2 are ligands for the PD-1 immune inhibiting checkpoint that can be induced in tumors by interferon exposure, leading to immune evasion. This process is important for immunotherapy based on PD-1 blockade. We examined the specific molecules involved in interferon-induced signaling that regulates PD-L1 and PD-L2 expression in melanoma cells. These studies revealed that the interferon-gamma-JAK1/JAK2-STAT1/STAT2/STAT3-IRF1 axis primarily regulates PD-L1 expression, with IRF1 binding to its promoter. PD-L2 responded equally to interferon beta and gamma and is regulated through both IRF1 and STAT3, which bind to the PD-L2 promoter. Analysis of biopsy specimens from patients with melanoma confirmed interferon signature enrichment and upregulation of gene targets for STAT1/STAT2/STAT3 and IRF1 in anti-PD-1-responding tumors. Therefore, these studies map the signaling pathway of interferon-gamma-inducible PD-1 ligand expression.
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Affiliation(s)
- Angel Garcia-Diaz
- Division of Hematology-Oncology, Department of Medicine, David Geffen School of Medicine, University of California, Los Angeles (UCLA), Los Angeles, CA 90095, USA.
| | - Daniel Sanghoon Shin
- Division of Hematology-Oncology, Department of Medicine, David Geffen School of Medicine, University of California, Los Angeles (UCLA), Los Angeles, CA 90095, USA
| | - Blanca Homet Moreno
- Division of Hematology-Oncology, Department of Medicine, David Geffen School of Medicine, University of California, Los Angeles (UCLA), Los Angeles, CA 90095, USA; Division of Translational Oncology, Carlos III Health Institute, 28029 Madrid, Spain
| | - Justin Saco
- Division of Hematology-Oncology, Department of Medicine, David Geffen School of Medicine, University of California, Los Angeles (UCLA), Los Angeles, CA 90095, USA
| | - Helena Escuin-Ordinas
- Division of Hematology-Oncology, Department of Medicine, David Geffen School of Medicine, University of California, Los Angeles (UCLA), Los Angeles, CA 90095, USA
| | - Gabriel Abril Rodriguez
- Division of Hematology-Oncology, Department of Medicine, David Geffen School of Medicine, University of California, Los Angeles (UCLA), Los Angeles, CA 90095, USA
| | - Jesse M Zaretsky
- Division of Hematology-Oncology, Department of Medicine, David Geffen School of Medicine, University of California, Los Angeles (UCLA), Los Angeles, CA 90095, USA
| | - Lu Sun
- Division of Dermatology, Department of Medicine, UCLA, Los Angeles, CA 90095, USA
| | - Willy Hugo
- Division of Dermatology, Department of Medicine, UCLA, Los Angeles, CA 90095, USA
| | - Xiaoyan Wang
- Statistics Core, Department of Medicine, UCLA, Los Angeles, CA 90095, USA
| | - Giulia Parisi
- Division of Hematology-Oncology, Department of Medicine, David Geffen School of Medicine, University of California, Los Angeles (UCLA), Los Angeles, CA 90095, USA
| | - Cristina Puig Saus
- Division of Hematology-Oncology, Department of Medicine, David Geffen School of Medicine, University of California, Los Angeles (UCLA), Los Angeles, CA 90095, USA
| | - Davis Y Torrejon
- Division of Hematology-Oncology, Department of Medicine, David Geffen School of Medicine, University of California, Los Angeles (UCLA), Los Angeles, CA 90095, USA
| | - Thomas G Graeber
- Department of Molecular and Medical Pharmacology, UCLA, Los Angeles, CA 90095, USA; Crump Institute for Molecular Imaging, UCLA, Los Angeles, CA 90095, USA; Jonsson Comprehensive Cancer Center, UCLA, Los Angeles, CA 90095, USA
| | - Begonya Comin-Anduix
- Jonsson Comprehensive Cancer Center, UCLA, Los Angeles, CA 90095, USA; Division of Surgical Oncology, Department of Surgery, UCLA, Los Angeles, CA 90095, USA
| | - Siwen Hu-Lieskovan
- Division of Hematology-Oncology, Department of Medicine, David Geffen School of Medicine, University of California, Los Angeles (UCLA), Los Angeles, CA 90095, USA
| | - Robert Damoiseaux
- Department of Molecular and Medical Pharmacology, UCLA, Los Angeles, CA 90095, USA; California NanoSystems Institute, UCLA, Los Angeles, CA 90095, USA
| | - Roger S Lo
- Division of Dermatology, Department of Medicine, UCLA, Los Angeles, CA 90095, USA; Department of Molecular and Medical Pharmacology, UCLA, Los Angeles, CA 90095, USA; Jonsson Comprehensive Cancer Center, UCLA, Los Angeles, CA 90095, USA
| | - Antoni Ribas
- Division of Hematology-Oncology, Department of Medicine, David Geffen School of Medicine, University of California, Los Angeles (UCLA), Los Angeles, CA 90095, USA; Department of Molecular and Medical Pharmacology, UCLA, Los Angeles, CA 90095, USA; Jonsson Comprehensive Cancer Center, UCLA, Los Angeles, CA 90095, USA; Division of Surgical Oncology, Department of Surgery, UCLA, Los Angeles, CA 90095, USA.
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21
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Fang Q, Yao S, Luo G, Zhang X. Identification of differentially expressed genes in human breast cancer cells induced by 4-hydroxyltamoxifen and elucidation of their pathophysiological relevance and mechanisms. Oncotarget 2017; 9:2475-2501. [PMID: 29416786 PMCID: PMC5788654 DOI: 10.18632/oncotarget.23504] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2017] [Accepted: 12/13/2017] [Indexed: 12/14/2022] Open
Abstract
While tamoxifen (TAM) is used for treating estrogen receptor (ER)a-positive breast cancer patients, its anti-breast cancer mechanisms are not completely elucidated. This study aimed to examine effects of 4-hydroxyltamoxifen (4-OH-TAM) on ER-positive (ER+) breast cancer MCF-7 cell growth and gene expression profiles. MCF-7 cell growth was inhibited by 4-OH-TAM dose-dependently with IC50 of 29 μM. 332 genes were up-regulated while 320 genes were down-regulated. The mRNA levels of up-regulated genes including STAT1, STAT2, EIF2AK2, TGM2, DDX58, PARP9, SASH1, RBL2 and USP18 as well as down-regulated genes including CCDN1, S100A9, S100A8, ANXA1 and PGR were confirmed by quantitative real-time PCR (qRT-PCR). In human breast tumor tissues, mRNA levels of EIF2Ak2, USP18, DDX58, RBL2, STAT2, PGR, S1000A9, and CCND1 were significantly higher in ER+- than in ER--breast cancer tissues. The mRNA levels of EIF2AK2, TGM2, USP18, DDX58, PARP9, STAT2, STAT1, PGR and CCND1 were all significantly higher in ER+-tumor tissues than in their corresponding tumor-adjacent tissues. These genes, except PGR and CCND1 which were down-regulated, were also up-regulated in ER+ MCF-7 cells by 4-OH-TAM. Total 14 genes mentioned above are involved in regulation of cell proliferation, apoptosis, cell cycles, and estrogen and interferon signal pathways. Bioinformatics analysis also revealed other novel and important regulatory factors that are associated with these genes and involved in the mentioned functional processes. This study has paved a foundation for elucidating TAM anti-breast cancer mechanisms in E2/ER-dependent and independent pathways.
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Affiliation(s)
- Qi Fang
- Department of Breast Surgery, The Third Affiliated Hospital of Soochow University, Changzhou 213003, P.R. China
| | - Shuang Yao
- Comprehensive Laboratory, The Third Affiliated Hospital of Soochow University, Changzhou 213003, P.R. China
| | - Guanghua Luo
- Comprehensive Laboratory, The Third Affiliated Hospital of Soochow University, Changzhou 213003, P.R. China
| | - Xiaoying Zhang
- Comprehensive Laboratory, The Third Affiliated Hospital of Soochow University, Changzhou 213003, P.R. China
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22
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Foreman HCC, Armstrong J, Santana AL, Krug LT, Reich NC. The replication and transcription activator of murine gammaherpesvirus 68 cooperatively enhances cytokine-activated, STAT3-mediated gene expression. J Biol Chem 2017; 292:16257-16266. [PMID: 28821622 DOI: 10.1074/jbc.m117.786970] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2017] [Revised: 08/04/2017] [Indexed: 12/15/2022] Open
Abstract
Gammaherpesviruses (γHVs) have a dynamic strategy for lifelong persistence, involving productive infection, latency, and intermittent reactivation. In latency reservoirs, such as B lymphocytes, γHVs exist as viral episomes and express few viral genes. Although the ability of γHV to reactivate from latency and re-enter the lytic phase is challenging to investigate and control, it is known that the γHV replication and transcription activator (RTA) can promote lytic reactivation. In this study, we provide first evidence that RTA of murine γΗV68 (MHV68) selectively binds and enhances the activity of tyrosine-phosphorylated host STAT3. STAT3 is a transcription factor classically activated by specific tyrosine 705 phosphorylation (pTyr705-STAT3) in response to cytokine stimulation. pTyr705-STAT3 forms a dimer that avidly binds a consensus target site in the promoters of regulated genes, and our results indicate that RTA cooperatively enhances the ability of pTyr705-STAT3 to induce expression of a STAT3-responsive reporter gene. As indicated by coimmunoprecipitation, in latently infected B cells that are stimulated to reactivate MHV68, RTA bound specifically to endogenous pTyr705-STAT3. An in vitro binding assay confirmed that RTA selectively recognizes pTyr705-STAT3 and indicated that the C-terminal transactivation domain of RTA was required for enhancing STAT3-directed gene expression. The cooperation of these transcription factors may influence both viral and host genes. During MHV68 de novo infection, pTyr705-STAT3 promoted the temporal expression of ORF59, a viral replication protein. Our results demonstrate that MHV68 RTA specifically recognizes and recruits activated pTyr705-STAT3 during the lytic phase of infection.
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Affiliation(s)
- Hui-Chen Chang Foreman
- From the Department of Molecular Genetics and Microbiology, Stony Brook University, Stony Brook, New York 11794
| | - Julie Armstrong
- From the Department of Molecular Genetics and Microbiology, Stony Brook University, Stony Brook, New York 11794
| | - Alexis L Santana
- From the Department of Molecular Genetics and Microbiology, Stony Brook University, Stony Brook, New York 11794
| | - Laurie T Krug
- From the Department of Molecular Genetics and Microbiology, Stony Brook University, Stony Brook, New York 11794
| | - Nancy C Reich
- From the Department of Molecular Genetics and Microbiology, Stony Brook University, Stony Brook, New York 11794
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23
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Majoros A, Platanitis E, Kernbauer-Hölzl E, Rosebrock F, Müller M, Decker T. Canonical and Non-Canonical Aspects of JAK-STAT Signaling: Lessons from Interferons for Cytokine Responses. Front Immunol 2017; 8:29. [PMID: 28184222 PMCID: PMC5266721 DOI: 10.3389/fimmu.2017.00029] [Citation(s) in RCA: 199] [Impact Index Per Article: 28.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2016] [Accepted: 01/09/2017] [Indexed: 01/07/2023] Open
Abstract
Janus kinase (JAK)-signal transducer and activator of transcription (STAT) signal transduction mediates cytokine responses. Canonical signaling is based on STAT tyrosine phosphorylation by activated JAKs. Downstream of interferon (IFN) receptors, activated JAKs cause the formation of the transcription factors IFN-stimulated gene factor 3 (ISGF3), a heterotrimer of STAT1, STAT2 and interferon regulatory factor 9 (IRF9) subunits, and gamma interferon-activated factor (GAF), a STAT1 homodimer. In recent years, several deviations from this paradigm were reported. These include kinase-independent JAK functions as well as extra- and intranuclear activities of U-STATs without phosphotyrosines. Additionally, transcriptional control by STAT complexes resembling neither GAF nor ISGF3 contributes to transcriptome changes in IFN-treated cells. Our review summarizes the contribution of non-canonical JAK-STAT signaling to the innate antimicrobial immunity imparted by IFN. Moreover, we touch upon functions of IFN pathway proteins beyond the IFN response. These include metabolic functions of IRF9 as well as the regulation of natural killer cell activity by kinase-dead TYK2 and different phosphorylation isoforms of STAT1.
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Affiliation(s)
- Andrea Majoros
- Department of Microbiology, Immunobiology and Genetics, Max F. Perutz Laboratories, University of Vienna, Vienna, Austria
| | - Ekaterini Platanitis
- Department of Microbiology, Immunobiology and Genetics, Max F. Perutz Laboratories, University of Vienna, Vienna, Austria
| | - Elisabeth Kernbauer-Hölzl
- Department of Microbiology, Immunobiology and Genetics, Max F. Perutz Laboratories, University of Vienna, Vienna, Austria
| | - Felix Rosebrock
- Department of Microbiology, Immunobiology and Genetics, Max F. Perutz Laboratories, University of Vienna, Vienna, Austria
| | - Mathias Müller
- Institute of Animal Breeding and Genetics, University of Veterinary Medicine Vienna, Vienna, Austria
| | - Thomas Decker
- Department of Microbiology, Immunobiology and Genetics, Max F. Perutz Laboratories, University of Vienna, Vienna, Austria
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24
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Hoang DT, Iczkowski KA, Kilari D, See W, Nevalainen MT. Androgen receptor-dependent and -independent mechanisms driving prostate cancer progression: Opportunities for therapeutic targeting from multiple angles. Oncotarget 2017; 8:3724-3745. [PMID: 27741508 PMCID: PMC5356914 DOI: 10.18632/oncotarget.12554] [Citation(s) in RCA: 85] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2016] [Accepted: 09/29/2016] [Indexed: 12/25/2022] Open
Abstract
Despite aggressive treatment for localized cancer, prostate cancer (PC) remains a leading cause of cancer-related death for American men due to a subset of patients progressing to lethal and incurable metastatic castrate-resistant prostate cancer (CRPC). Organ-confined PC is treated by surgery or radiation with or without androgen deprivation therapy (ADT), while options for locally advanced and disseminated PC include radiation combined with ADT, or systemic treatments including chemotherapy. Progression to CRPC results from failure of ADT, which targets the androgen receptor (AR) signaling axis and inhibits AR-driven proliferation and survival pathways. The exact mechanisms underlying the transition from androgen-dependent PC to CRPC remain incompletely understood. Reactivation of AR has been shown to occur in CRPC despite depletion of circulating androgens by ADT. At the same time, the presence of AR-negative cell populations in CRPC has also been identified. While AR signaling has been proposed as the primary driver of CRPC, AR-independent signaling pathways may represent additional mechanisms underlying CRPC progression. Identification of new therapeutic strategies to target both AR-positive and AR-negative PC cell populations and, thereby, AR-driven as well as non-AR-driven PC cell growth and survival mechanisms would provide a two-pronged approach to eliminate CRPC cells with potential for synthetic lethality. In this review, we provide an overview of AR-dependent and AR-independent molecular mechanisms which drive CRPC, with special emphasis on the role of the Jak2-Stat5a/b signaling pathway in promoting castrate-resistant growth of PC through both AR-dependent and AR-independent mechanisms.
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Affiliation(s)
- David T Hoang
- Sidney Kimmel Medical College, Thomas Jefferson University, Philadelphia, PA, USA
| | - Kenneth A Iczkowski
- Department of Pathology, Medical College of Wisconsin Cancer Center, Medical College of Wisconsin, Milwaukee, WI, USA
| | - Deepak Kilari
- Department of Medicine, Medical College of Wisconsin Cancer Center, Medical College of Wisconsin, Milwaukee, WI, USA
| | - William See
- Department of Urology, Medical College of Wisconsin Cancer Center, Medical College of Wisconsin, Milwaukee, WI, USA
| | - Marja T Nevalainen
- Department of Pathology, Medical College of Wisconsin Cancer Center, Medical College of Wisconsin, Milwaukee, WI, USA
- Department of Pharmacology/Toxicology, Medical College of Wisconsin Cancer Center, Medical College of Wisconsin, Milwaukee, WI, USA
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25
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Fultz M, Vogel S. Autoregulation by interferons provides an endogenous 'priming' signal for LPS-responsive macrophages. ACTA ACUST UNITED AC 2016. [DOI: 10.1177/096805199500200201] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
RT-PCR technology was used to evaluate endogenous levels of IFN-α, β, and γ mRNA in macrophages derived from LPS-responsive (C3H/OuJ) and LPS-hyporesponsive (C3H/HeJ) mice. IFN mRNA levels were found to be consistently higher in the LPS-responsive macrophages. That these IFNs may be part of an autocrine loop is supported by the observations that treatment of macrophages, in vitro, with IFN-α or IFN-β induces IFN-γ mRNA and, conversely, that exogenous IFN-γ treatment results in increased detection of both IFN-a and IFN-β mRNA species. In vitro 'priming' of LPS-hyporesponsive macrophages with either IFN-α or IFN-γ causes these cells to be activated by a polyI:C triggering signal, in a manner equivalent to that seen for LPS-'primed' C3H/OuJ macrophages. Thus, low levels of endogenous IFNs, which induce each other bidirectionally, may provide a replenishable source of 'primed' macrophages, that are more plentiful in Lpsn mice and that are capable of being 'triggered' to functional maturity during an immune response.
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Affiliation(s)
- M.J. Fultz
- Department of Microbiology and Immunology, Uniformed Services University of the Health Sciences, Bethesda, Maryland, USA
| | - S.N. Vogel
- Department of Microbiology and Immunology, Uniformed Services University of the Health Sciences, Bethesda, Maryland, USA
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26
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Sobhkhez M, Skjesol A, Thomassen E, Tollersrud LG, Iliev DB, Sun B, Robertsen B, Jørgensen JB. Structural and functional characterization of salmon STAT1, STAT2 and IRF9 homologs sheds light on interferon signaling in teleosts. FEBS Open Bio 2014; 4:858-71. [PMID: 25379383 PMCID: PMC4215117 DOI: 10.1016/j.fob.2014.09.007] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2014] [Revised: 09/24/2014] [Accepted: 09/26/2014] [Indexed: 01/10/2023] Open
Abstract
Mammalian IRF9 and STAT2, together with STAT1, form the ISGF3 transcription factor complex, which is critical for type I interferon (IFN)-induced signaling, while IFNγ stimulation is mediated by homodimeric STAT1 protein. Teleost fish are known to possess most JAK and STAT family members, however, description of their functional activity in lower vertebrates is still scarce. In the present study we have identified two different STAT2 homologs and one IRF9 homolog from Atlantic salmon (Salmo salar). Both proteins have domain-like structures with functional motifs that are similar to higher vertebrates, suggesting that they are orthologs to mammalian STAT2 and IRF9. The two identified salmon STAT2s, named STAT2a and STAT2b, showed high sequence identity but were divergent in their transactivation domain (TAD). Like STAT1, ectopically expressed STAT2a and b were shown to be tyrosine phosphorylated by type I IFNs and, interestingly, also by IFNγ. Microscopy analyses demonstrated that STAT2 co-localized with STAT1a in the cytoplasm of unstimulated cells, while IFNa1 and IFNγ stimulation seemed to favor their nuclear localization. Overexpression of STAT2a or STAT2b together with STAT1a activated a GAS-containing reporter gene construct in IFNγ-stimulated cells. The highest induction of GAS promoter activation was found in IFNγ-stimulated cells transfected with IRF9 alone. Taken together, these data suggest that salmon STAT2 and IRF9 may have a role in IFNγ-induced signaling and promote the expression of GAS-driven genes in bony fish. Since mammalian STAT2 is primarily an ISGF3 component and not involved in IFNγ signaling, our finding features a novel role for STAT2 in fish.
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Affiliation(s)
- Mehrdad Sobhkhez
- The Norwegian College of Fishery Science, UiT The Arctic University of Norway, N-9037 Tromsø, Norway
| | - Astrid Skjesol
- The Norwegian College of Fishery Science, UiT The Arctic University of Norway, N-9037 Tromsø, Norway
| | - Ernst Thomassen
- The Norwegian College of Fishery Science, UiT The Arctic University of Norway, N-9037 Tromsø, Norway
| | - Linn Greiner Tollersrud
- The Norwegian College of Fishery Science, UiT The Arctic University of Norway, N-9037 Tromsø, Norway
| | - Dimitar B Iliev
- The Norwegian College of Fishery Science, UiT The Arctic University of Norway, N-9037 Tromsø, Norway
| | - Baojian Sun
- The Norwegian College of Fishery Science, UiT The Arctic University of Norway, N-9037 Tromsø, Norway
| | - Børre Robertsen
- The Norwegian College of Fishery Science, UiT The Arctic University of Norway, N-9037 Tromsø, Norway
| | - Jorunn B Jørgensen
- The Norwegian College of Fishery Science, UiT The Arctic University of Norway, N-9037 Tromsø, Norway
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27
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Abstract
Interferon-stimulated gene (ISG) products take on a number of diverse roles. Collectively, they are highly effective at resisting and controlling pathogens. In this review, we begin by introducing interferon (IFN) and the JAK-STAT signaling pathway to highlight features that impact ISG production. Next, we describe ways in which ISGs both enhance innate pathogen-sensing capabilities and negatively regulate signaling through the JAK-STAT pathway. Several ISGs that directly inhibit virus infection are described with an emphasis on those that impact early and late stages of the virus life cycle. Finally, we describe ongoing efforts to identify and characterize antiviral ISGs, and we provide a forward-looking perspective on the ISG landscape.
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Affiliation(s)
- William M. Schneider
- Laboratory of Virology and Infectious Disease, The Rockefeller University, New York, NY 10065
| | | | - Charles M. Rice
- Laboratory of Virology and Infectious Disease, The Rockefeller University, New York, NY 10065
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28
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Abstract
The cellular responses to infection are many, and include programmed cell death to inhibit microbial dissemination and the production and secretion of interferons (IFNs), which confer resistance to uninfected cells. In addition to the antimicrobial effects of IFNs, these cytokines have been used clinically for the treatment of various neoplasias to inhibit proliferation and stimulate apoptosis. However, the precise mechanisms of action of IFNs remain to be completely understood. One of the primary response genes induced after an infection or treatment with type I or III IFN is known as IFN-stimulated gene 54 (ISG54) or IFN-induced gene with tetratricopeptide repeats 2 (IFIT2). ISG54/IFIT2 is a member of a family of IFN-induced genes related in the sequence and structure. Expression of this protein has been found to promote cellular apoptosis by a mitochondrial pathway dependent on the action of Bcl2 proteins. ISG54/IFIT2 does not function as a monomer, and it forms complexes with itself and with the related ISG56/IFIT1 and ISG60/IFIT3 proteins to elicit complex cellular responses. The apoptotic response to ISG54/IFIT2 may contribute to other functions that have been reported, including translational regulation, inhibition of tumor colonization, and protection against a lethal viral infection.
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Affiliation(s)
- Nancy C Reich
- Department of Molecular Genetics and Microbiology, Stony Brook University , Stony Brook, NY 11794, USA.
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29
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Sjöstrand M, Ambrosi A, Brauner S, Sullivan J, Malin S, Kuchroo VK, Espinosa A, Wahren-Herlenius M. Expression of the Immune Regulator Tripartite-Motif 21 Is Controlled by IFN Regulatory Factors. THE JOURNAL OF IMMUNOLOGY 2013; 191:3753-63. [DOI: 10.4049/jimmunol.1202341] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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30
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Interferon-γ upregulates expression of IFP35 gene in HeLa cells via interferon regulatory factor-1. PLoS One 2012; 7:e50932. [PMID: 23226549 PMCID: PMC3514179 DOI: 10.1371/journal.pone.0050932] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2012] [Accepted: 10/25/2012] [Indexed: 11/28/2022] Open
Abstract
Background Interferon-induced 35-kDa protein (IFP35) plays important roles in antiviral defense and the progression of some skin cancer diseases. It can be induced by interferon-γ (IFN-γ) in multiple human cells. However, the mechanisms by which IFN-γ contributes to IFP35 induction remain to be elucidated. Methods/Principal Findings We identified the transcription start sites of IFP35 by 5′ rapid amplification of cDNA ends (RACE) and cloned the promoter of IFP35. Sequence analysis and luciferase assays revealed two GC boxes and an IFN-stimulated response element (ISRE) in the 5′ upstream region of the transcription start sites, which were important for the basal transcription of IFP35 gene. Furthermore, we found that interferon regulatory factor 1 (IRF-1) and IRF-2 could bind to IFP35 promoter and upregulate endogenous IFP35 protein level. Depletion of endogenous IRF-1 by interfering RNA reduced the constitutive and IFN-γ-dependent expression of IFP35, whereas depletion of IRF-2 had little effect on IFN-γ-inducible IFP35 expression. Moreover, IRF-1 was recruited to the ISRE site in IFP35 promoter in IFN-γ treated HeLa cells, as demonstrated by electrophoretic mobility shift and chromatin immunoprecipitation assays. Conclusions/Significance These findings provide the first evidence that IRF-1 and IRF-2 are involved in constitutive IFP35 expression in HeLa cells, while IRF-1 also activates IFP35 expression in an IFN-γ-inducible manner. Our data therefore identified a new IRF-1 and IRF-2 target gene, which may expand our current understanding of the versatile functions of IRF-1 and IRF-2.
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31
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Pisapia L, Pozzo GD, Barba P, Citro A, Harris PE, Maffei A. Contrasting effects of IFNα on MHC class II expression in professional vs. nonprofessional APCs: Role of CIITA type IV promoter. RESULTS IN IMMUNOLOGY 2012; 2:174-83. [PMID: 24371581 DOI: 10.1016/j.rinim.2012.09.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 07/31/2012] [Revised: 09/16/2012] [Accepted: 09/19/2012] [Indexed: 01/01/2023]
Abstract
We previously demonstrated that, in ex vivo cultures, IFNα downregulates the expression of MHC class II (MHCII) genes in human non-professional APCs associated with pancreatic islets. IFNα has an opposing effect on MHCII expression in professional APCs. In this study, we found that the mechanism responsible for the IFNα-mediated MHCII's downregulation in human MHCII-positive non-professional antigen presenting human non-hematopoietic cell lines is the result of the negative feedback system that regulates cytokine signal transduction, which eventually inhibits promoters III and IV of CIITA gene. Because the CIITA-PIV isoform is mostly responsible for the constitutive expression of MHCII genes in non-professional APCs, we pursued and achieved the specific knockdown of CIITA-PIV mRNA in our in vitro system, obtaining a partial silencing of MHCII molecules similar to that obtained by IFNα. We believe that our results offer a new understanding of the potential significance of CIITA-PIV as a therapeutic target for interventional strategies that can manage autoimmune disease and allograft rejection with little interference on the function of professional APCs of the immune system.
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Affiliation(s)
- Laura Pisapia
- Institute of Genetics and Biophysics A. Buzzati-Traverso, CNR, Naples, Italy
| | - Giovanna Del Pozzo
- Institute of Genetics and Biophysics A. Buzzati-Traverso, CNR, Naples, Italy
| | - Pasquale Barba
- Institute of Genetics and Biophysics A. Buzzati-Traverso, CNR, Naples, Italy
| | - Alessandra Citro
- Department of Medicine of Columbia University Medical Center, New York, NY, USA
| | - Paul E Harris
- Department of Medicine of Columbia University Medical Center, New York, NY, USA
| | - Antonella Maffei
- Institute of Genetics and Biophysics A. Buzzati-Traverso, CNR, Naples, Italy ; Department of Medicine of Columbia University Medical Center, New York, NY, USA
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32
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Makowska Z, Heim MH. Interferon signaling in the liver during hepatitis C virus infection. Cytokine 2012; 59:460-6. [DOI: 10.1016/j.cyto.2012.06.015] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2012] [Accepted: 06/04/2012] [Indexed: 12/11/2022]
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33
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Suppression of IP-10/CXCL10 gene expression in LPS- and/or IFN-γ-stimulated macrophages by parasite-secreted products. Cell Immunol 2012; 276:101-9. [PMID: 22608126 DOI: 10.1016/j.cellimm.2012.04.007] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2012] [Revised: 04/06/2012] [Accepted: 04/09/2012] [Indexed: 01/22/2023]
Abstract
T helper (Th)2 polarized immune responses are characteristically dominant in helminth infections. The gene expression of interferon (IFN)-γ-inducible protein 10 (IP-10/CXCL10), which promotes Th1 responses, in mouse macrophages stimulated with lipopolysaccharide (LPS) and/or IFN-γ was suppressed by excretory/secretory (ES) products of Spirometra erinaceieuropaei plerocercoids. ES products suppressed LPS- and/or IFN-γ-induced transcriptional activities of a luciferase reporter gene under the control of a 243-bp fragment of the IP-10 gene promoter/enhancer, which contains an IFN-stimulated response element (ISRE) and two κB elements. Consistent with this result, ES products inhibited ISRE-dependent heterologous promoter activities and LPS- or IFN-γ-induced ISRE-binding activity. ES products also suppressed LPS-induced IFN-β gene expression. Furthermore, ES products suppressed nuclear factor (NF)-κB RelA (p65)-dependent transcriptional activity, whereas ES products had no effect on the κB-binding activity. These results suggest that ES products suppress the IP-10 gene expression by inhibiting the ISRE- and RelA-dependent transcriptional activities in mouse macrophages.
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34
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Abstract
We look back on the discoveries that the tyrosine kinases TYK2 and JAK1 and the transcription factors STAT1, STAT2, and IRF9 are required for the cellular response to type I interferons. This initial description of the JAK-STAT pathway led quickly to additional discoveries that type II interferons and many other cytokines signal through similar mechanisms. This well-understood pathway now serves as a paradigm showing how information from protein-protein contacts at the cell surface can be conveyed directly to genes in the nucleus. We also review recent work on the STAT proteins showing the importance of several different posttranslational modifications, including serine phosphorylation, acetylation, methylation, and sumoylation. These remarkably proficient proteins also provide noncanonical functions in transcriptional regulation and they also function in mitochondrial respiration and chromatin organization in ways that may not involve transcription at all.
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Affiliation(s)
- George R. Stark
- Department of Molecular Genetics, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, USA
| | - James E. Darnell
- Laboratory of Molecular Cell Biology, The Rockefeller University, New York, NY 10065-6399, USA
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35
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Yabu T, Toda H, Shibasaki Y, Araki K, Yamashita M, Anzai H, Mano N, Masuhiro Y, Hanazawa S, Shiba H, Moritomo T, Nakanishi T. Antiviral protection mechanisms mediated by ginbuna crucian carp interferon gamma isoforms 1 and 2 through two distinct interferon gamma-receptors. J Biochem 2011; 150:635-48. [PMID: 21903635 DOI: 10.1093/jb/mvr108] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2023] Open
Abstract
Fish genomes possess three type II interferon (IFN) genes, ifnγ1, ifnγ2 and ifnγ-related (ifnγrel). The IFNγ-dependent STAT signalling pathway found in humans and mice had not been characterized in fish previously. To identify the antiviral functions and signalling pathways of the type II IFN system in fish, we purified the ifnγ1, ifnγ2 and ifnγrel proteins of ginbuna crucian carp expressed in bacteria and found them to elicit high antiviral activities against crucian carp hematopoietic necrosis virus. We also cloned two distinct ifnγ receptor alpha chain (ifngr1) isoforms, 1 and 2, and stably expressed them in HeLa cells by transfecting the cells with ifngr1-1 or ifngr1-2 cDNA. When receptor transfectants were treated with the ligands in a one-ligand-one-receptor manner (ifnγ1 and ifngr1-2 or ifnγ2 and ifngr1-1), the stat1 protein was phosphorylated at both serine-727 and tyrosine-701 residues. Gel shift mobility analysis and reporter assay clearly showed that the specific ligand-receptor interaction resulted in the binding of the stat1 protein to the GAS element and enhanced transcription. Therefore, the actions of ifnγ1 and ifnγ2 were found to be mediated by a specific receptor for each signalling pathway via a stat1-dependent mechanism.
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Affiliation(s)
- Takeshi Yabu
- Nihon University College of Bioresource Sciences 1866, Kameino, Fujisawa, Kanagawa, 252-0880, Japan
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36
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Abstract
The epithelial apical membrane Na+/H+ exchangers [NHE (sodium hydrogen exchanger)2 and NHE3] and Cl-/HCO3- exchangers [DRA (down-regulated in adenoma) and PAT-1 (putative anion transporter 1)] are key luminal membrane transporters involved in electroneutral NaCl absorption in the mammalian intestine. During the last decade, there has been a surge of studies focusing on the short-term regulation of these electrolyte transporters, particularly for NHE3 regulation. However, the long-term regulation of the electrolyte transporters, involving transcriptional mechanisms and transcription factors that govern their basal regulation or dysregulation in diseased states, has only now started to unfold with the cloning and characterization of their gene promoters. The present review provides a detailed analysis of the core promoters of NHE2, NHE3, DRA and PAT-1 and outlines the transcription factors involved in their basal regulation as well as in response to both physiological (butyrate, protein kinases and probiotics) and pathophysiological (cytokines and high levels of serotonin) stimuli. The information available on the transcriptional regulation of the recently identified NHE8 isoform is also highlighted. Therefore the present review bridges a gap in our knowledge of the transcriptional mechanisms underlying the alterations in the gene expression of intestinal epithelial luminal membrane Na+ and Cl- transporters involved in electroneutral NaCl absorption. An understanding of the mechanisms of the modulation of gene expression of these transporters is important for a better assessment of the pathophysiology of diarrhoea associated with inflammatory and infectious diseases and may aid in designing better management protocols.
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Cimica V, Chen HC, Iyer JK, Reich NC. Dynamics of the STAT3 transcription factor: nuclear import dependent on Ran and importin-β1. PLoS One 2011; 6:e20188. [PMID: 21625522 PMCID: PMC3098288 DOI: 10.1371/journal.pone.0020188] [Citation(s) in RCA: 97] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2010] [Accepted: 04/27/2011] [Indexed: 01/05/2023] Open
Abstract
The signal transducer and activator of transcription-3 (STAT3) induces transcription of genes that control differentiation, inflammation, proliferation, and tumor cell invasion. Cytokines such as interleukin-6 and interferon stimulate the specific tyrosine phosphorylation of STAT3, which confers its ability to bind consensus DNA targets. In addition, unphosphorylated STAT3 has been demonstrated to induce specific gene expression. STAT3 must gain entrance to the nucleus to impact transcription, however access to the nucleus is a tightly regulated process. Because nuclear trafficking is critical to the function of STAT3, we investigated the molecular mechanisms by which STAT3 is imported to the nucleus. Live cell imaging techniques were used with STAT3 tagged with green fluorescence protein (GFP) or photoactivatable GFP to follow the cellular dynamics of both unphosphorylated and tyrosine phosphorylated forms. Cytokine activation did not alter the rate of STAT3 nuclear import or nuclear export. In addition, Förster resonance energy transfer experiments revealed homomeric interaction of unphosphorylated STAT3 dependent on its amino terminus, but this dimerization is not necessary for its nuclear import. Previous work demonstrated the adapter importin-α3 binds to STAT3 and is required for nuclear import. To determine whether STAT3 nuclear import is mediated by the importin-α/importin-β1 heterodimer, the effects of siRNA to importin-β1 were evaluated. Results indicate STAT3 nuclear import is dependent on the function of importin-β1. Since the Ran GTPase is necessary to bind importin-β1 in the nucleus for release of importin-α-cargo, the effect of a GTPase deficient mutant of Ran was tested. Expression of the Ran interfering mutant inhibited STAT3 nuclear import. This study defines importin-α/importin-β1/Ran as the molecular mechanism by which STAT3 traffics to the nucleus.
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Affiliation(s)
- Velasco Cimica
- Department of Molecular Genetics and Microbiology, Stony Brook University, Stony Brook, New York, United States of America
| | - Hui-Chen Chen
- Department of Molecular Genetics and Microbiology, Stony Brook University, Stony Brook, New York, United States of America
| | - Janaki K. Iyer
- Department of Molecular Genetics and Microbiology, Stony Brook University, Stony Brook, New York, United States of America
| | - Nancy C. Reich
- Department of Molecular Genetics and Microbiology, Stony Brook University, Stony Brook, New York, United States of America
- * E-mail:
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38
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NF-kappaB protects cells from gamma interferon-induced RIP1-dependent necroptosis. Mol Cell Biol 2011; 31:2934-46. [PMID: 21576359 DOI: 10.1128/mcb.05445-11] [Citation(s) in RCA: 100] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Interferons (IFNs) are cytokines with well-described immunomodulatory and antiviral properties, but less is known about the mechanisms by which they promote cell survival or cell death. Here, we show that IFN-γ induces RIP1 kinase-dependent necroptosis in mammalian cells deficient in NF-κB signaling. Induction of necroptosis by IFN-γ was found to depend on Jak1 and partially on STAT1. We also demonstrate that IFN-γ activates IκB kinase β (IKKβ)-dependent NF-κB to regulate a transcriptional program that protects cells from necroptosis. IFN-γ induced progressive accumulation of reactive oxygen species (ROS) and eventual loss of mitochondrial membrane potential in cells lacking the NF-κB subunit RelA. Whole-genome microarray analyses identified sod2, encoding the antioxidant enzyme manganese superoxide dismutase (MnSOD), as a RelA target and potential antinecroptotic gene. Overexpression of MnSOD inhibited IFN-γ-mediated ROS accumulation and partially rescued RelA-deficient cells from necroptosis, while RNA interference (RNAi)-mediated silencing of sod2 expression increased susceptibility to IFN-γ-induced cell death. Together, these studies demonstrate that NF-κB protects cells from IFN-γ-mediated necroptosis by transcriptionally activating a survival response that quenches ROS to preserve mitochondrial integrity.
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Song G, Fleming JAGW, Kim J, Spencer TE, Bazer FW. Pregnancy and interferon tau regulate N-myc interactor in the ovine uterus. Domest Anim Endocrinol 2011; 40:87-97. [PMID: 21067885 DOI: 10.1016/j.domaniend.2010.09.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/25/2010] [Revised: 09/09/2010] [Accepted: 09/09/2010] [Indexed: 01/24/2023]
Abstract
In ruminants, interferon tau (IFNT) is synthesized and secreted by the mononuclear trophectoderm cells of the conceptus and maintains the corpus luteum and its secretion of progesterone for successful implantation and maintenance of pregnancy. In this study, we examined regulation of the expression of N-myc interactor (NMI) gene by IFNT in the ovine uterus based on results of microarray data from a study that compared gene expression by human 2fTGH and U3A (STAT1-null 2fTGH) cell lines in response to treatment with IFNT or vehicle. In the present study, semiquantitative reverse transcription-polymerase chain reaction analyses verified that IFNT stimulated expression of NMI mRNA in 2fTGH (ie, in a STAT1-dependent manner), but not in U3A (STAT1-null) cells. Furthermore, results of western blot analyses indicated that immunoreactive NMI proteins in 2fTGH and U3A cell lines increased in a time-dependent manner only in response to IFNT. In ovine endometria, steady-state levels of NMI mRNA increased between days 14 and 16 of pregnancy and then decreased slightly by day 20, but there was no effect of day of the estrous cycle. Expression of NMI mRNA was most abundant in endometrial stromal cells, glandular epithelium, and conceptus trophectoderm. Intrauterine infusion of IFNT in cyclic ewes increased expression of NMI in the endometrium. Expression of NMI in ovine and bovine uterine cell lines increased in response to IFNT. Collectively, the results of the present study indicate that IFNT regulates expression of NMI mRNA and protein in ovine endometria during pregnancy via a STAT1-dependent cell signaling pathway.
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Affiliation(s)
- G Song
- WCU Biomodulation Major, Department of Agricultural Biotechnology, Seoul National University, Seoul, Korea
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40
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Song G, Fleming JAGW, Kim J, Spencer TE, Bazer FW. Pregnancy and interferon tau regulate DDX58 and PLSCR1 in the ovine uterus during the peri-implantation period. Reproduction 2011; 141:127-38. [PMID: 20926691 DOI: 10.1530/rep-10-0348] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Interferon τ (IFNT), the pregnancy recognition signal in ruminants, abrogates the luteolytic mechanism for maintenance of the corpus luteum for production of progesterone (P(4)). This study examined the expression of DEAD (Asp-Glu-Ala-Asp) box polypeptide 58 (DDX58) and phospholipid scramblase 1 (PLSCR1) mRNAs in the ovine uterus as these genes were increased most in 2fTGH (STAT1 positive) cells by IFNT. The results of this study indicated that IFNT regulates expression of DDX58 and PLSCR1 mRNAs in the ovine uterus, which confirmed the results of the in vitro transcriptional profiling experiment with the 2fTGH (parental STAT1 positive) and U3A (STAT1 null) cell lines. Steady-state levels of DDX58 and PLSCR1 mRNAs increased in cells of the ovine uterus between days 12 and 20 of pregnancy, but not between days 10 and 16 of the estrous cycle. The expression of DDX58 and PLSCR1 mRNAs was greatest in endometrial stromal cells, but there was transient expression in uterine luminal and superficial glandular epithelial cells. P(4) alone did not induce expression of DDX58 and PLSCR1 mRNAs; however, intrauterine injections of IFNT did induce expression of DDX58 and PLSCR1 mRNAs in the endometria of nonpregnant ewes independent of effects of P(4). These results indicate that IFNT induces expression of DDX58 and PLSCR1 in ovine endometrial cells via the classical STAT1-mediated cell signaling pathway. Based on their known biological effects, DDX58 and PLSCR1 are IFN-stimulated genes, which may increase the antiviral status of cells of the pregnant uterus to protect against viral infection and/or enhance secretion of type I IFNs that inhibit viral replication.
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Affiliation(s)
- Gwonhwa Song
- WCU Biomodulation Major, Department of Agricultural Biotechnology, Seoul National University, 599 Gwanak-ro, Gwanak-gu, Seoul, Korea
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41
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Chung EY, Kim BH, Hong JT, Lee CK, Ahn B, Nam SY, Han SB, Kim Y. Resveratrol down-regulates interferon-γ-inducible inflammatory genes in macrophages: molecular mechanism via decreased STAT-1 activation. J Nutr Biochem 2010; 22:902-9. [PMID: 21189227 DOI: 10.1016/j.jnutbio.2010.07.012] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2009] [Revised: 07/10/2010] [Accepted: 07/23/2010] [Indexed: 01/10/2023]
Abstract
Resveratrol (trans-3,4',5-trihydroxystilbene) is one of nonflavonoid polyphenolic phytoalexins found in various plant species, a number of which are components of human diet including grapes and red wines. Resveratrol has exerted several beneficial effects with anti-inflammation, cardioprotection and cancer chemoprevention. However, its mechanisms of action are not completely understood. In this study, we investigated effects of resveratrol on inflammatory gene expression in interferon (IFN)-γ alone-stimulated macrophages and proposed a molecular basis underlying the action. Resveratrol inhibited IFN-γ-induced production of nitric oxide (NO), IFN-γ-inducible protein-10 (IP-10), or the monokine induced by IFN-γ (MIG) in RAW 264.7 macrophages and also that of NO in primary macrophages derived from bone marrows of C3H/HeJ (toll-like receptor-4(-/-)) mice. Moreover, resveratrol diminished IFN-γ-induced protein levels of inducible NO synthase (iNOS), attenuated mRNA levels of iNOS, IP-10 or MIG as well as inhibited IFN-γ-induced promoter activity of iNOS gene, indicating that the phytoalexin could down-regulate inflammatory genes at the transcription level. To understand a mechanism of the action, we tested resveratrol could affect the signal transducers and activation of transcription-1 (STAT-1), a pivotal transcription factor in IFN-γ-induced expression of inflammatory genes. Resveratrol inhibited IFN-γ-induced transcriptional activity of STAT-1 in macrophages and also IFN-γ-induced Tyr(701) or Ser(727) phosphorylation of STAT-1. We then focused on protein kinases upstream STAT-1 phosphorylation. Resveratrol inhibited IFN-γ-induced activation of Janus kinase-2 (JAK-2) and also the extracellular signal-regulated kinase, in which JAK-2 was more sensitive. Taken together, this study proposes a new mechanism of resveratrol, blocking JAK/STAT-1 pathway that controls inflammatory responses in IFN-γ-activated macrophages.
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Affiliation(s)
- Eun Yong Chung
- College of Pharmacy, Chungbuk National University, Cheongju, Republic of Korea
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42
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Chung EY, Roh E, Kwak JA, Lee HS, Lee SH, Lee CK, Han SB, Kim Y. alpha-Viniferin suppresses the signal transducer and activation of transcription-1 (STAT-1)-inducible inflammatory genes in interferon-gamma-stimulated macrophages. J Pharmacol Sci 2010; 112:405-14. [PMID: 20424383 DOI: 10.1254/jphs.09247fp] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
Abstract
alpha-Viniferin, an oligostilbene of trimeric resveratrol, has been reported to have anti-inflammatory potential in carrageenin-induced paw edema or adjuvant-induced arthritis in animal models. However, little is known about the molecular basis. In this study, alpha-viniferin at 3 - 10 microM dose-dependently inhibited interferon (IFN)-gamma-induced Ser(727) phosphorylation of the signal transducer and activation of transcription-1 (STAT-1), a pivotal transcription factor controlling IFN-gamma-targeted genes, in RAW 264.7 macrophages, and also IFN-gamma-induced activation of the extracellular signal-regulated kinase (ERK)-1, a protein kinase upstream of the Ser(727) phosphorylation of STAT-1. However, alpha-viniferin, only at a higher concentration of 10 microM, inhibited Janus kinase 2-mediated Tyr(701) phosphorylation of STAT-1 in the cells. To understand STAT-1-dependent inflammatory responses, we quantified nitric oxide (NO) or chemokines. alpha-Viniferin at 3 - 10 muM dose-dependently inhibited IFN-gamma-induced production of NO, IFN-gamma-inducible protein-10 (IP-10), or the monokine induced by IFN-gamma (MIG) in RAW 264.7 cells and also that of NO in primary macrophages-derived from C57BL/6 mice. Furthermore, alpha-viniferin diminished IFN-gamma-induced protein levels of inducible NO synthase (iNOS), attenuated mRNA levels of iNOS, IP-10, or MIG as well as inhibited promoter activity of the iNOS gene. In conclusion, this study proposes an anti-inflammatory mechanism of alpha-viniferin, down-regulating STAT-1-inducible inflammatory genes via inhibiting ERK-mediated STAT-1 activation in IFN-gamma-stimulated macrophages.
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Affiliation(s)
- Eun Yong Chung
- College of Pharmacy, Chungbuk National University, Korea
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43
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Ramachandran A, Horvath CM. Paramyxovirus disruption of interferon signal transduction: STATus report. J Interferon Cytokine Res 2010; 29:531-7. [PMID: 19694544 DOI: 10.1089/jir.2009.0070] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
RNA viruses in the paramyxovirus family have evolved a number of strategies to escape host cell surveillance and antiviral responses. One mechanism exploited by a number of viruses in this family is direct targeting of cytokine-inducible transcription regulators in the STAT family. Diverse members of this large virus family effectively suppress STAT signaling by the actions of their V proteins, or the related proteins derived from alternate viral mRNAs. These viral proteins have distinct means of targeting STATs, resulting in a variety of negative effects on STATs and their signal transduction. Recent developments in understanding STAT targeting will be reviewed.
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Affiliation(s)
- Aparna Ramachandran
- Department of Biochemistry, Molecular Biology, and Cell Biology, Northwestern University, Evanston, Illinois 60208, USA
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44
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Chung EY, Kim BH, Lee IJ, Roh E, Oh SJ, Kwak JA, Lee YR, Ahn B, Nam SY, Han SB, Kim Y. The benzoxathiolone LYR-71 down-regulates interferon-gamma-inducible pro-inflammatory genes by uncoupling tyrosine phosphorylation of STAT-1 in macrophages. Br J Pharmacol 2010; 158:1971-81. [PMID: 19922538 DOI: 10.1111/j.1476-5381.2009.00496.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
BACKGROUND AND PURPOSE Benzoxathiolone derivatives have shown anti-inflammatory and immunomodulatory potential in acne and psoriatic disorders. However, little is known about the molecular basis for these pharmacological effects. In this study, we decided to investigate the anti-inflammatory actions of a benzoxathiolone derivative LYR-71, 6-methyl-2-propylimino-6,7-dihydro-5H-benzo[1,3]oxathiol-4-one, in interferon (IFN)-gamma-activated macrophages. EXPERIMENTAL APPROACH RAW 264.7 macrophages or primary macrophages, derived from bone marrow of C3H/HeJ mice, were stimulated with IFN-gamma in the presence of LYR-71. Nitric oxide (NO) or chemokine production was measured by Griess reaction or enzyme-linked immunosorbent assay. RAW 264.7 cells were used to examine the molecular mechanisms of LYR-71 in modulating IFN-gamma-induced inflammatory responses. KEY RESULTS LYR-71 down-regulated IFN-gamma-induced transcription of inducible NO synthase, IFN-gamma-inducible protein-10 and the monokine induced by IFN-gamma genes in macrophages. This effect was mediated by uncoupling tyrosine phosphorylation of the signal transducer and activator of transcription (STAT)-1 in response to IFN-gamma. LYR-71 directly inhibited the in vitro catalytic activity of Janus kinase (JAK)-2. Further, the inhibitory actions of LYR-71 on IFN-gamma-induced STAT-1 phosphorylation and NO production were consistently abolished in the presence of peroxyvanadate, implying another target dependent on protein tyrosine phosphatase. CONCLUSIONS AND IMPLICATIONS Taken together, LYR-71 could restrain IFN-gamma-induced inflammatory responses through uncoupling the tyrosine phosphorylation of STAT-1, an activation index of JAK-STAT-1 signalling, in macrophages. These results may provide a molecular mechanism underlying anti-inflammatory actions shown by benzoxathiolone derivatives.
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Affiliation(s)
- E-Y Chung
- College of Pharmacy, Chungbuk National University, Cheongju, Korea
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45
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Saksena S, Singla A, Goyal S, Katyal S, Bansal N, Gill RK, Alrefai WA, Ramaswamy K, Dudeja PK. Mechanisms of transcriptional modulation of the human anion exchanger SLC26A3 gene expression by IFN-{gamma}. Am J Physiol Gastrointest Liver Physiol 2010; 298:G159-66. [PMID: 19940027 PMCID: PMC2822505 DOI: 10.1152/ajpgi.00374.2009] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Two members of the SLC26 gene family, SLC26A3 or DRA (downregulated in adenoma) and SLC26A6 (putative anion transporter 1, PAT1), are known to play a major role in apical Cl(-)/OH(-) (HCO(3)(-)) exchange process in the human intestine. We have previously shown the inhibitory effects of IFN-gamma (30 ng/ml, 24 h) on both SLC26A3 and A6 expression and promoter activity. We also demonstrated that the effects of IFN-gamma on SLC26A6 gene expression were mediated via IRF-1 transcription factor. However, the molecular mechanisms underlying the transcriptional modulation of SLC26A3 gene expression by IFN-gamma in the intestine are not known. The present studies were, therefore, designed to elucidate the signaling mechanisms and transcription factor(s) involved in mediating the inhibitory effects of IFN-gamma on DRA promoter (p--1183/+114) activity. Deletion analysis indicated that the IFN-gamma response element is located within the -1183 to -790 region, and sequence analysis of this region revealed the presence of potential gamma-activated site (GAS), a binding site (-933/-925 bp) for signal transducer and activator of transcription factor 1 (STAT1). Mutations in the potential GAS element abrogated the inhibitory effects of IFN-gamma. These studies provide evidence for the involvement of STAT1 in the inhibition of SLC26A3 gene expression by IFN-gamma in the human intestine.
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Affiliation(s)
- Seema Saksena
- Section of Digestive Diseases and Nutrition, Department of Medicine, University of Illinois at Chicago, Chicago, IL 60612, USA.
| | - Amika Singla
- 2Department of Physiology and Biophysics, University of Illinois at Chicago and
| | - Sonia Goyal
- 1Section of Digestive Diseases and Nutrition, Department of Medicine and
| | - Shivani Katyal
- 1Section of Digestive Diseases and Nutrition, Department of Medicine and
| | - Nikhil Bansal
- 1Section of Digestive Diseases and Nutrition, Department of Medicine and
| | - Ravinder K. Gill
- 1Section of Digestive Diseases and Nutrition, Department of Medicine and
| | - Waddah A. Alrefai
- 1Section of Digestive Diseases and Nutrition, Department of Medicine and ,3Jesse Brown Veterans Affairs Medical Center, Chicago, Illinois
| | - Krishnamurthy Ramaswamy
- 1Section of Digestive Diseases and Nutrition, Department of Medicine and ,3Jesse Brown Veterans Affairs Medical Center, Chicago, Illinois
| | - Pradeep K. Dudeja
- 1Section of Digestive Diseases and Nutrition, Department of Medicine and ,3Jesse Brown Veterans Affairs Medical Center, Chicago, Illinois
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Romero-Weaver AL, Wang HW, Steen HC, Scarzello AJ, Hall VL, Sheikh F, Donnelly RP, Gamero AM. Resistance to IFN-alpha-induced apoptosis is linked to a loss of STAT2. Mol Cancer Res 2010; 8:80-92. [PMID: 20068068 DOI: 10.1158/1541-7786.mcr-08-0344] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Type I IFNs (IFN-alpha/beta) are pleitropic cytokines widely used in the treatment of certain malignancies, hepatitis B and C, and multiple sclerosis. IFN resistance is a challenging clinical problem to overcome. Hence, understanding the molecular mechanism by which IFN immunotherapy ceases to be effective is of translational importance. In this study, we report that continuous IFN-alpha stimulation of the human Jurkat variant H123 led to resistance to type I IFN-induced apoptosis due to a loss of signal transducers and activators of transcription 2 (STAT2) expression. The apoptotic effects of IFN-alpha were hampered as STAT2-deficient cells were defective in activating the mitochondrial-dependent death pathway and ISGF3-mediated gene activation. Reconstitution of STAT2 restored the apoptotic effects of IFN-alpha as measured by the loss of mitochondrial membrane potential, cytochrome c release from mitochondria, caspase activation, and ultimately cell death. Nuclear localization of STAT2 was a critical event as retention of tyrosine-phosphorylated STAT2 in the cytosol was not sufficient to activate apoptosis. Furthermore, silencing STAT2 gene expression in Saos2 and A375S.2 tumor cell lines significantly reduced the apoptotic capacity of IFN-alpha. Altogether, we show that STAT2 is a critical mediator in the activation of type I IFN-induced apoptosis. More importantly, defects in the expression or nuclear localization of STAT2 could lessen the efficacy of type I IFN immunotherapy.
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Affiliation(s)
- Ana L Romero-Weaver
- Laboratory of Experimental Immunology, Cancer and Inflammation Program, National Cancer Institute, NIH, Frederick, Maryland, USA
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47
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Liao Z, Lutz J, Nevalainen MT. Transcription factor Stat5a/b as a therapeutic target protein for prostate cancer. Int J Biochem Cell Biol 2009; 42:186-92. [PMID: 19914392 DOI: 10.1016/j.biocel.2009.11.001] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2009] [Revised: 11/02/2009] [Accepted: 11/03/2009] [Indexed: 10/20/2022]
Abstract
Prostate cancer is the most common non-cutaneous cancer in Western males. The majority of prostate cancer fatalities are caused by development of castration-resistant growth and metastatic spread of the primary tumor. The average duration of the response of primary prostate cancer to hormonal ablation is less than 3 years, and 75% of prostate cancers in the United States progress to castration-resistant disease. The existing pharmacological therapies for metastatic and/or castration-resistant prostate cancer do not provide significant survival benefit. This review summarizes the importance of transcription factor Stat5 signaling in the pathogenesis of prostate cancer and discusses the molecular basis of Stat5a/b inhibition as a therapeutic strategy for prostate cancer.
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Affiliation(s)
- Zhiyong Liao
- Department of Cancer Biology, Kimmel Cancer Center, Thomas Jefferson University, 233 S. 10th Street, Philadelphia, PA 19107, USA
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48
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Goring K, Huang Y, Mowat C, Léger C, Lim TH, Zaheer R, Mok D, Tibbles LA, Zygun D, Winston BW. Mechanisms of human complement factor B induction in sepsis and inhibition by activated protein C. Am J Physiol Cell Physiol 2009; 296:C1140-50. [DOI: 10.1152/ajpcell.00071.2009] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
To investigate the potential role of the local expression of alternative complement factor B (hBf) in human sepsis, we examined the induction of Bf gene expression in human peripheral blood monocytes (PBMCs) from patients with septic shock and the mechanisms of hBf gene regulation by tumor necrosis factor (TNF)-α, interferon (IFN)-γ, and lipopolysaccharide (LPS) in human monocytes. PBMCs from septic shock patients showed increased hBf mRNA expression when compared with control patients. Costimulation with TNF-α and IFN-γ or stimulation with LPS demonstrated a time- and dose-dependent induction of hBf mRNA expression in human PBMCs. A region of the hBf promoter between −735 and +128 bp was found to mediate IFN-γ, TNF-α, and LPS responsiveness as well as the synergistic effect of IFN-γ/TNF-α on hBf promoter activity. Site-directed mutagenesis of a IFN-γ-activation site (GAS) cis element (−90 to −82 bp) abrogated IFN-γ responsiveness. Mutagenesis of a nuclear factor (NF)-κB cis element at −466 to −456 bp abrogated TNF-α and LPS responsiveness of the Bf promoter. Thus hBf gene expression is induced in PBMCs from septic shock patients, and the induction of hBf by IFN-γ, TNF-α, and LPS is through GAS and NF-κB cis-binding sites on the hBf promoter. Furthermore, activated protein C (APC) inhibited LPS-stimulated hBf promoter activity and protein expression in human monocytes suggesting that the beneficial effect of APC therapy in sepsis may in part be due to inhibition of complement induction and/or activation via the alternative pathway.
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49
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A point mutation, E95D, in the mumps virus V protein disengages STAT3 targeting from STAT1 targeting. J Virol 2009; 83:6347-56. [PMID: 19386700 DOI: 10.1128/jvi.00596-09] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Mumps virus, like other paramyxoviruses in the Rubulavirus genus, encodes a V protein that can assemble a ubiquitin ligase complex from cellular components, leading to the destruction of cellular signal transducer and activator of transcription (STAT) proteins. While many V proteins target the interferon-activated STAT1 or STAT2 protein, mumps virus V protein is unique in its ability to also target STAT3 for ubiquitin modification and proteasome-mediated degradation. Here we report that a single amino acid substitution in the mumps virus V protein, E95D, results in defective STAT3 targeting while maintaining the ability to target STAT1. Results indicate that the E95D mutation disrupts the ability of the V protein to associate with STAT3. A recombinant mumps virus carrying the E95D mutation in its P and V proteins replicates normally in cultured cells but fails to induce targeting of STAT3. Infection with the recombinant virus results in the differential regulation of a number of cellular genes compared to wild-type mumps virus and increases cell death in infected cells, producing a large-plaque phenotype.
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50
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Kim SH, Oh J, Choi JY, Jang JY, Kang MW, Lee CE. Identification of human thioredoxin as a novel IFN-gamma-induced factor: mechanism of induction and its role in cytokine production. BMC Immunol 2008; 9:64. [PMID: 18983687 PMCID: PMC2596082 DOI: 10.1186/1471-2172-9-64] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2008] [Accepted: 11/05/2008] [Indexed: 02/07/2023] Open
Abstract
Background IFN-γ is a multifunctional peptide with a potent immune defense function which is also known as a prototypic Th1 cytokine. While screening for genes differentially expressed by Th1 and Th2 cytokines, human thioredoxin was identified as a novel target gene induced by IFN-γ. The mechanism by which thioredoxin is induced by IFN-γ and the signaling pathways involved in its induction were analyzed. In addition, the effects of thioredoxin on immune cell survival and cytokine production were examined by thioredoxin over-expression and recombinant thioredoxin treatment. Results Human thioredoxin was selectively induced by IFN-γ in monocytic and T cell lines. In monocytic cells, the induction of thioredoxin gene expression by IFN-γ was dose-dependent, and both the mRNA and protein levels were increased by 2~3 fold within 4 to 24 h hours of IFN-γ treatment. The thioredoxin induction by IFN-γ was insensitive to cycloheximide treatment, suggesting that it is a primary response gene induced by IFN-γ. Subsequent analysis of the signaling pathways indicated that the Jak/Stat, Akt, and Erk pathways play a role in IFN-γ signaling that leads to thioredoxin gene expression. Thioredoxin was induced by oxidative or radiation stresses, and it protected the immune cells from apoptosis by reducing the levels of reactive oxygen species. Furthermore, thioredoxin modulated the oxidant-induced cytokine balance toward Th1 by counter-regulating the production of IL-4 and IFN-γ in T cells. Conclusion These data suggest that thioredoxin is an IFN-γ-induced factor that may play a role in developing Th1 immunity and in the maintenance of immune homeostasis upon infection, radiation, and oxidative stress.
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Affiliation(s)
- Seol-Hee Kim
- Laboratory of Immunology, Department of Biological Science, Sungkyunkwan University, Suwon, Korea.
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