1
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Gaertner F, Ishikawa-Ankerhold H, Stutte S, Fu W, Weitz J, Dueck A, Nelakuditi B, Fumagalli V, van den Heuvel D, Belz L, Sobirova G, Zhang Z, Titova A, Navarro AM, Pekayvaz K, Lorenz M, von Baumgarten L, Kranich J, Straub T, Popper B, Zheden V, Kaufmann WA, Guo C, Piontek G, von Stillfried S, Boor P, Colonna M, Clauß S, Schulz C, Brocker T, Walzog B, Scheiermann C, Aird WC, Nerlov C, Stark K, Petzold T, Engelhardt S, Sixt M, Hauschild R, Rudelius M, Oostendorp RAJ, Iannacone M, Heinig M, Massberg S. Plasmacytoid dendritic cells control homeostasis of megakaryopoiesis. Nature 2024; 631:645-653. [PMID: 38987596 PMCID: PMC11254756 DOI: 10.1038/s41586-024-07671-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2021] [Accepted: 06/04/2024] [Indexed: 07/12/2024]
Abstract
Platelet homeostasis is essential for vascular integrity and immune defence1,2. Although the process of platelet formation by fragmenting megakaryocytes (MKs; thrombopoiesis) has been extensively studied, the cellular and molecular mechanisms required to constantly replenish the pool of MKs by their progenitor cells (megakaryopoiesis) remains unclear3,4. Here we use intravital imaging to track the cellular dynamics of megakaryopoiesis over days. We identify plasmacytoid dendritic cells (pDCs) as homeostatic sensors that monitor the bone marrow for apoptotic MKs and deliver IFNα to the MK niche triggering local on-demand proliferation and maturation of MK progenitors. This pDC-dependent feedback loop is crucial for MK and platelet homeostasis at steady state and under stress. pDCs are best known for their ability to function as vigilant detectors of viral infection5. We show that virus-induced activation of pDCs interferes with their function as homeostatic sensors of megakaryopoiesis. Consequently, activation of pDCs by SARS-CoV-2 leads to excessive megakaryopoiesis. Together, we identify a pDC-dependent homeostatic circuit that involves innate immune sensing and demand-adapted release of inflammatory mediators to maintain homeostasis of the megakaryocytic lineage.
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Affiliation(s)
- Florian Gaertner
- Department of Medicine I, University Hospital, LMU Munich, Munich, Germany.
- Institute of Science and Technology Austria (ISTA), Klosterneuburg, Austria.
- DZHK (German Centre for Cardiovascular Research), Partner site Munich Heart Alliance, Munich, Germany.
| | | | - Susanne Stutte
- Institute of Cardiovascular Physiology and Pathophysiology, Biomedical Center, LMU Munich, Planegg-Martinsried, Germany
- Walter Brendel Center of Experimental Medicine, University Hospital, LMU Munich, Munich, Germany
- Institute for Immunology, Faculty of Medicine, LMU Munich, Munich, Germany
| | - Wenwen Fu
- Department of Medicine I, University Hospital, LMU Munich, Munich, Germany
| | - Jutta Weitz
- Department of Medicine I, University Hospital, LMU Munich, Munich, Germany
| | - Anne Dueck
- DZHK (German Centre for Cardiovascular Research), Partner site Munich Heart Alliance, Munich, Germany
- Institute of Pharmacology and Toxicology, Technical University of Munich (TUM), Munich, Germany
| | - Bhavishya Nelakuditi
- Department of Medicine I, University Hospital, LMU Munich, Munich, Germany
- Institute of Computational Biology, Deutsches Forschungszentrum für Gesundheit und Umwelt, Helmholtz Zentrum München, Neuherberg, Germany
- Department of Computer Science, TUM School of Computation, Information and Technology, Technical University of Munich, Garching, Germany
| | - Valeria Fumagalli
- Division of Immunology, Transplantation and Infectious Diseases, IRCCS San Raffaele Scientific Institute, Milan, Italy
- Department of Dynamics of Immune Responses, Vita-Salute San Raffaele University, Milan, Italy
| | | | - Larissa Belz
- Department of Medicine I, University Hospital, LMU Munich, Munich, Germany
| | - Gulnoza Sobirova
- Department of Medicine I, University Hospital, LMU Munich, Munich, Germany
| | - Zhe Zhang
- Department of Medicine I, University Hospital, LMU Munich, Munich, Germany
| | - Anna Titova
- Department of Medicine I, University Hospital, LMU Munich, Munich, Germany
| | | | - Kami Pekayvaz
- Department of Medicine I, University Hospital, LMU Munich, Munich, Germany
- DZHK (German Centre for Cardiovascular Research), Partner site Munich Heart Alliance, Munich, Germany
| | - Michael Lorenz
- Department of Medicine I, University Hospital, LMU Munich, Munich, Germany
| | - Louisa von Baumgarten
- Department of Neurology, Ludwig-Maximilians-University School of Medicine, Munich, Germany
| | - Jan Kranich
- Institute for Immunology, Faculty of Medicine, LMU Munich, Munich, Germany
| | - Tobias Straub
- Biomedical Center, Bioinformatic Core facility, LMU Munich, Planegg-Martinsried, Germany
| | - Bastian Popper
- Biomedical Center, Core Facility Animal Models, LMU Munich, Planegg-Martinsried, Germany
| | - Vanessa Zheden
- Institute of Science and Technology Austria (ISTA), Klosterneuburg, Austria
| | | | - Chenglong Guo
- Department of Medicine I, University Hospital, LMU Munich, Munich, Germany
| | - Guido Piontek
- Institute of Pathology, Ludwig-Maximilians-University Munich, Munich, Germany
| | | | - Peter Boor
- Institute of Pathology, RWTH Aachen University Hospital, Aachen, Germany
| | - Marco Colonna
- Washington University, School of Medicine, St Louis, MO, USA
| | - Sebastian Clauß
- Department of Medicine I, University Hospital, LMU Munich, Munich, Germany
| | - Christian Schulz
- Department of Medicine I, University Hospital, LMU Munich, Munich, Germany
- DZHK (German Centre for Cardiovascular Research), Partner site Munich Heart Alliance, Munich, Germany
| | - Thomas Brocker
- Institute for Immunology, Faculty of Medicine, LMU Munich, Munich, Germany
| | - Barbara Walzog
- Institute of Cardiovascular Physiology and Pathophysiology, Biomedical Center, LMU Munich, Planegg-Martinsried, Germany
- Walter Brendel Center of Experimental Medicine, University Hospital, LMU Munich, Munich, Germany
| | - Christoph Scheiermann
- Institute of Cardiovascular Physiology and Pathophysiology, Biomedical Center, LMU Munich, Planegg-Martinsried, Germany
- Walter Brendel Center of Experimental Medicine, University Hospital, LMU Munich, Munich, Germany
- Department of Pathology and Immunology, Faculty of Medicine, University of Geneva, Geneva, Switzerland
| | - William C Aird
- Department of Medicine, Center for Vascular Biology Research, Beth Israel Deaconess Medical Center, Boston, MA, USA
| | - Claus Nerlov
- MRC Molecular Haematology Unit, MRC Weatherall Institute of Molecular Medicine, University of Oxford, John Radcliffe Hospital, Oxford, UK
| | - Konstantin Stark
- Department of Medicine I, University Hospital, LMU Munich, Munich, Germany
- DZHK (German Centre for Cardiovascular Research), Partner site Munich Heart Alliance, Munich, Germany
| | - Tobias Petzold
- Department of Medicine I, University Hospital, LMU Munich, Munich, Germany
- DZHK (German Centre for Cardiovascular Research), Partner site Munich Heart Alliance, Munich, Germany
- Department of Cardiology, Angiology and Intensive Care Medicine, Campus Benjamin Franklin, Deutsches Herzzentrum der Charité (DHZC) University Hospital Berlin, Berlin, Germany
- DZHK (German Centre for Cardiovascular Research), Partner site Berlin, Berlin, Germany
- Friede Springer - Centre of Cardiovascular Prevention @ Charité, Charité - University Medicine Berlin, Berlin, Germany
| | - Stefan Engelhardt
- DZHK (German Centre for Cardiovascular Research), Partner site Munich Heart Alliance, Munich, Germany
- Institute of Pharmacology and Toxicology, Technical University of Munich (TUM), Munich, Germany
| | - Michael Sixt
- Institute of Science and Technology Austria (ISTA), Klosterneuburg, Austria
| | - Robert Hauschild
- Institute of Science and Technology Austria (ISTA), Klosterneuburg, Austria
| | - Martina Rudelius
- Institute of Pathology, Ludwig-Maximilians-University Munich, Munich, Germany
| | - Robert A J Oostendorp
- Laboratory of Stem Cell Physiology, Department of Internal Medicine III-Hematology and Oncology, Klinikum rechts der Isar, School of Medicine, Technical University of Munich, Munich, Germany
| | - Matteo Iannacone
- Division of Immunology, Transplantation and Infectious Diseases, IRCCS San Raffaele Scientific Institute, Milan, Italy
- Department of Dynamics of Immune Responses, Vita-Salute San Raffaele University, Milan, Italy
| | - Matthias Heinig
- DZHK (German Centre for Cardiovascular Research), Partner site Munich Heart Alliance, Munich, Germany
- Institute of Computational Biology, Deutsches Forschungszentrum für Gesundheit und Umwelt, Helmholtz Zentrum München, Neuherberg, Germany
- Department of Computer Science, TUM School of Computation, Information and Technology, Technical University of Munich, Garching, Germany
| | - Steffen Massberg
- Department of Medicine I, University Hospital, LMU Munich, Munich, Germany
- DZHK (German Centre for Cardiovascular Research), Partner site Munich Heart Alliance, Munich, Germany
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2
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Mukherjee M, Goswami S. Identification of Key Deregulated RNA-Binding Proteins in Pancreatic Cancer by Meta-Analysis and Prediction of Their Role as Modulators of Oncogenesis. Front Cell Dev Biol 2021; 9:713852. [PMID: 34912796 PMCID: PMC8667787 DOI: 10.3389/fcell.2021.713852] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2021] [Accepted: 11/04/2021] [Indexed: 11/13/2022] Open
Abstract
RNA-binding proteins (RBPs) play a significant role in multiple cellular processes with their deregulations strongly associated with cancer. However, there are not adequate evidences regarding global alteration and functions of RBPs in pancreatic cancer, interrogated in a systematic manner. In this study, we have prepared an exhaustive list of RBPs from multiple sources, downloaded gene expression microarray data from a total of 241 pancreatic tumors and 124 normal pancreatic tissues, performed a meta-analysis, and obtained differentially expressed RBPs (DE-RBPs) using the Limma package of R Bioconductor. The results were validated in microarray datasets and the Cancer Genome Atlas (TCGA) RNA sequencing dataset for pancreatic adenocarcinoma (PAAD). Pathway enrichment analysis was performed using DE-RBPs, and we also constructed the protein-protein interaction (PPI) network to detect key modules and hub-RBPs. Coding and noncoding targets for top altered and hub RBPs were identified, and altered pathways modulated by these targets were also investigated. Our meta-analysis identified 45 upregulated and 15 downregulated RBPs as differentially expressed in pancreatic cancer, and pathway enrichment analysis demonstrated their important contribution in tumor development. As a result of PPI network analysis, 26 hub RBPs were detected and coding and noncoding targets for all these RBPs were categorized. Functional exploration characterized the pathways related to epithelial-to-mesenchymal transition (EMT), cell migration, and metastasis to emerge as major pathways interfered by the targets of these RBPs. Our study identified a unique meta-signature of 26 hub-RBPs to primarily modulate pancreatic tumor cell migration and metastasis in pancreatic cancer. IGF2BP3, ISG20, NIP7, PRDX1, RCC2, RUVBL1, SNRPD1, PAIP2B, and SIDT2 were found to play the most prominent role in the regulation of EMT in the process. The findings not only contribute to understand the biology of RBPs in pancreatic cancer but also to evaluate their candidature as possible therapeutic targets.
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Affiliation(s)
| | - Srikanta Goswami
- National Institute of Biomedical Genomics, Kalyani, India.,Regional Centre for Biotechnology, Faridabad, India
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3
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Pin G, Huanting L, Chengzhan Z, Xinjuan K, Yugong F, Wei L, Shifang L, Zhaojian L, Kun H, Weicheng Y, Yingying L, Yongming Q, Yanan Y. Down-Regulation of PDCD4 Promotes Proliferation, Angiogenesis and Tumorigenesis in Glioma Cells. Front Cell Dev Biol 2020; 8:593685. [PMID: 33304903 PMCID: PMC7693433 DOI: 10.3389/fcell.2020.593685] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2020] [Accepted: 10/19/2020] [Indexed: 12/23/2022] Open
Abstract
The programmed cell death 4 (PDCD4) tumor-suppressor gene regulates cell apoptosis, protein translation, signal transduction, and induction of mediators of inflammation. However, the mechanism by which PDCD4 is down-regulated and regulates tumor growth remains elusive. In this study, we showed that PDCD4 is down-regulated in glioma cells and acts as a tumor suppressor. Based on the TCGA data, we confirmed that AKT2, but not AKT1 or AKT3, interacts with PDCD4, thus leading to the suppression of PDCD4 in glioma cells. Moreover, the analysis suggested that PDCD4 regulates the expression of IL-5, CCL-5, VEGF, and CXCL10 via the NF-kB pathway. Additionally, depletion of levels of PDCD4 promoted angiogenic activity of glioma cells via the VEGF-STAT3 pathway. When tumor cells over-expressing PDCD4 were injected into nude mice, the increased expression of PDCD4 blocked tumorigenesis and prolonged overall survival. Our study indicates the need to develop drugs that can modulate the expression of PDCD4 and test their efficacy in clinical trials.
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Affiliation(s)
- Guo Pin
- Department of Neurosurgery, The Affiliated Hospital of Qingdao University, Qingdao, China.,Institute of Cerebral Vascular Diseases, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Li Huanting
- Department of Neurosurgery, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Zhu Chengzhan
- Department of Hepatobiliary and Pancreatic Surgery, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Kong Xinjuan
- Department of Gastroenterology, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Feng Yugong
- Department of Neurosurgery, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Liu Wei
- Department of Neurosurgery, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Li Shifang
- Department of Neurosurgery, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Li Zhaojian
- Department of Neurosurgery, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Han Kun
- Department of Neurosurgery, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Yao Weicheng
- Department of Neurosurgery, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Lin Yingying
- Department of Neurosurgery, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Qiu Yongming
- Department of Neurosurgery, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Yu Yanan
- Department of Gastroenterology, The Affiliated Hospital of Qingdao University, Qingdao, China
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4
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Ahn D, Prince A. Participation of the IL-10RB Related Cytokines, IL-22 and IFN-λ in Defense of the Airway Mucosal Barrier. Front Cell Infect Microbiol 2020; 10:300. [PMID: 32637365 PMCID: PMC7318800 DOI: 10.3389/fcimb.2020.00300] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2020] [Accepted: 05/19/2020] [Indexed: 12/12/2022] Open
Abstract
The airway epithelial barrier is a major barrier protecting against clinically significant infections of the lung. Its integrity is often compromised due to mechanical, chemical, or infectious causes. Opportunistic bacterial pathogens are poised to cause parenchymal infection and become difficult to eradicate due to adaptive metabolic changes, biofilm formation, and the acquisition of antimicrobial resistance and fitness genes. Enhancing mucosal defenses by modulating the cytokines that regulate barrier functions, such as interleukin-22 (IL-22) and interferon-λ (IFN-λ), members of the IL-10 family of cytokines, is an attractive approach to prevent these infections that are associated with high morbidity and mortality. These cytokines both signal through the cognate receptor IL-10RB, have related protein structures and common downstream signaling suggesting shared roles in host respiratory defense. They are typically co-expressed in multiple models of infections, but with differing kinetics. IL-22 has an important role in the producing antimicrobial peptides, upregulating expression of junctional proteins in the airway epithelium and working in concert with other inflammatory cytokines such as IL-17. Conversely, IFN-λ, a potent antiviral in influenza infection with pro-inflammatory properties, appears to decrease junctional integrity allowing for bacterial and immune cell translocation. The effects of these cytokines are pleotropic, with pathogen and tissue specific consequences. Understanding how these cytokines work in the mucosal defenses of the respiratory system may suggest potential targets to prevent invasive infections of the damaged lung.
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Affiliation(s)
| | - Alice Prince
- Department of Pediatrics, Columbia University Medical Center, New York, NY, United States
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5
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Liu F, Liu C, Hu X, Shang Y, Wu L. MicroRNA-21: A Positive Regulator for Optimal Production of Type I and Type III Interferon by Plasmacytoid Dendritic Cells. Front Immunol 2017; 8:947. [PMID: 28871250 PMCID: PMC5567078 DOI: 10.3389/fimmu.2017.00947] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2017] [Accepted: 07/25/2017] [Indexed: 01/04/2023] Open
Abstract
Plasmacytoid dendritic cells (pDCs) are the major producers of type I and type III interferons (IFNs) that play essential roles in host antiviral immunity. MicroRNAs (miRs) are small, noncoding RNAs that can modulate many immune processes. Although molecular regulation of type I IFN production by pDCs has been studied extensively, the regulation of type III IFN production has not been studied thoroughly, particularly at posttranscriptional level. We show here that miR-21 is an essential positive regulator for the production of both IFN-α and IFN-λ by pDCs and for promoting host defense against viral infection. miR-21 was markedly upregulated in toll-like receptor (TLR)-activated pDCs and was crucial for TLR7/9 ligand- or herpesvirus-induced production of IFN-α and IFN-λ by pDCs. miR-21-deficient pDCs produced significantly lower levels of IFN-α and IFN-λ on activation than those by wild-type pDCs. Impaired antiviral immune responses were also observed in miR-21-deficient mice. Mechanistically, we identified phosphatase and tensin homolog (PTEN) as the major target of miR-21 in pDCs, and miR-21 deficiency resulted in increased expression of PTEN that suppressed TLR-mediated activation of PI3K-Akt-mTOR signaling in pDCs. Hence, our findings provide evidence that miR-21 positively regulates both IFN-α and IFN-λ production and identify an important role for miR-21 in regulating the function of pDCs and in host antiviral immunity.
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Affiliation(s)
- Fang Liu
- Institute for Immunology and School of Medicine, Tsinghua University, Beijing, China
| | - Chunxi Liu
- Institute for Immunology and School of Medicine, Tsinghua University, Beijing, China
| | - Xiaoyu Hu
- Institute for Immunology and School of Medicine, Tsinghua University, Beijing, China
| | - Yingli Shang
- College of Veterinary Medicine, Shandong Agricultural University, Taian, China
| | - Li Wu
- Institute for Immunology and School of Medicine, Tsinghua University, Beijing, China.,Tsinghua-Peking Center for Life Sciences, Tsinghua University, Beijing, China
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6
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Abstract
The blockade of inhibitory receptors such as CTLA-4 (CD152) is being used as immune-checkpoint therapy, offering a powerful strategy to restore effective immune responses against tumors. To determine signal components that are induced under the control of CTLA-4 we analyzed activated murine CD8+ T cells by quantitative proteomics. Accurate mass spectrometry revealed that CTLA-4 engagement led to central changes in the phosphorylation of proteins involved in T-cell differentiation. Beside other targets, we discovered a CTLA-4-mediated induction of the translational inhibitor programmed cell death-4 (PDCD4) as a result of FoxO1 nuclear re-localization. PDCD4 further bound a distinct set of mRNAs including Glutaminase, which points out a critical role for CTLA-4 in CD8+ T-cell metabolism. Consequently, PDCD4-deficient cytotoxic T-lymphocytes (CTLs) expressed increased amounts of otherwise repressed effector molecules and ultimately led to superior control of tumor growth in vivo. These findings reveal a novel CTLA-4-mediated pathway to attenuate CTLs and indicate the importance of post-transcriptional mechanisms in the regulation of anti-tumor immune responses.
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7
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KSR1 and EPHB4 Regulate Myc and PGC1β To Promote Survival of Human Colon Tumors. Mol Cell Biol 2016; 36:2246-61. [PMID: 27273865 DOI: 10.1128/mcb.00087-16] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2016] [Accepted: 05/26/2016] [Indexed: 01/05/2023] Open
Abstract
Identification and characterization of survival pathways active in tumor cells but absent in normal tissues provide opportunities to develop effective anticancer therapies with reduced toxicity to the patient. We show here that, like kinase suppressor of Ras 1 (KSR1), EPH (erythropoietin-producing hepatocellular carcinoma) receptor B4 (EPHB4) is aberrantly overexpressed in human colon tumor cell lines and selectively required for their survival. KSR1 and EPHB4 support tumor cell survival by promoting the expression of downstream targets, Myc and the transcriptional coactivator peroxisome proliferator-activated receptor gamma coactivator 1β (PGC1β). While KSR1 promotes the aberrant expression of Myc and the PGC1β protein via a posttranscriptional mechanism, EPHB4 has a greater effect on Myc and PGC1β expression via its ability to elevate mRNA levels. Subsequent analysis of the posttranscriptional regulation demonstrated that KSR1 promotes the translation of Myc protein. These findings reveal novel KSR1- and EPHB4-dependent signaling pathways supporting the survival of colorectal cancer cells through regulation of Myc and PGC1β, suggesting that inhibition of KSR1 or EPHB4 effectors may lead to selective toxicity in colorectal tumors.
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8
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Kroczynska B, Rafidi RL, Majchrzak-Kita B, Kosciuczuk EM, Blyth GT, Jemielity J, Warminska Z, Saleiro D, Mehrotra S, Arslan AD, Fish EN, Platanias LC. Interferon γ (IFNγ) Signaling via Mechanistic Target of Rapamycin Complex 2 (mTORC2) and Regulatory Effects in the Generation of Type II Interferon Biological Responses. J Biol Chem 2015; 291:2389-96. [PMID: 26645692 DOI: 10.1074/jbc.m115.664995] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2015] [Indexed: 01/22/2023] Open
Abstract
We provide evidence for a unique pathway engaged by the type II IFN receptor, involving mTORC2/AKT-mediated downstream regulation of mTORC1 and effectors. These events are required for formation of the eukaryotic translation initiation factor 4F complex (eIF4F) and initiation of mRNA translation of type II interferon-stimulated genes. Our studies establish that Rictor is essential for the generation of type II IFN-dependent antiviral and antiproliferative responses and that it controls the generation of type II IFN-suppressive effects on normal and malignant hematopoiesis. Together, our findings establish a central role for mTORC2 in IFNγ signaling and type II IFN responses.
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Affiliation(s)
- Barbara Kroczynska
- From the Robert H. Lurie Comprehensive Cancer Center and Division of Hematology-Oncology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois 60611, the Department of Radiation Oncology, Northwestern University, Chicago, Illinois 60611
| | - Robert L Rafidi
- From the Robert H. Lurie Comprehensive Cancer Center and Division of Hematology-Oncology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois 60611
| | - Beata Majchrzak-Kita
- the Toronto General Research Institute, University Health Network, and Department of Immunology, University of Toronto, Toronto, Ontario M5G 2MI, Canada
| | - Ewa M Kosciuczuk
- From the Robert H. Lurie Comprehensive Cancer Center and Division of Hematology-Oncology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois 60611, the Division of Hematology-Oncology, Department of Medicine, Jesse Brown Veterans Affairs Medical Center, Chicago, Illinois 60612
| | - Gavin T Blyth
- From the Robert H. Lurie Comprehensive Cancer Center and Division of Hematology-Oncology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois 60611
| | - Jacek Jemielity
- the Centre of New Technologies, University of Warsaw, 02-097 Warsaw, Poland, and
| | - Zofia Warminska
- the Centre of New Technologies, University of Warsaw, 02-097 Warsaw, Poland, and the College of Inter-Faculty Individual Studies in Mathematics and Natural Sciences, University of Warsaw, 02-089 Warsaw, Poland
| | - Diana Saleiro
- From the Robert H. Lurie Comprehensive Cancer Center and Division of Hematology-Oncology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois 60611
| | - Swarna Mehrotra
- From the Robert H. Lurie Comprehensive Cancer Center and Division of Hematology-Oncology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois 60611
| | - Ahmet Dirim Arslan
- From the Robert H. Lurie Comprehensive Cancer Center and Division of Hematology-Oncology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois 60611
| | - Eleanor N Fish
- the Toronto General Research Institute, University Health Network, and Department of Immunology, University of Toronto, Toronto, Ontario M5G 2MI, Canada
| | - Leonidas C Platanias
- From the Robert H. Lurie Comprehensive Cancer Center and Division of Hematology-Oncology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois 60611, the Division of Hematology-Oncology, Department of Medicine, Jesse Brown Veterans Affairs Medical Center, Chicago, Illinois 60612,
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9
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Xu H, Dephoure N, Sun H, Zhang H, Fan F, Liu J, Ning X, Dai S, Liu B, Gao M, Fu S, Gygi SP, Zhou C. Proteomic Profiling of Paclitaxel Treated Cells Identifies a Novel Mechanism of Drug Resistance Mediated by PDCD4. J Proteome Res 2015; 14:2480-91. [PMID: 25928036 DOI: 10.1021/acs.jproteome.5b00004] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Paclitaxel (PTX) is a widely used chemotherapeutic drug effective against numerous cancers. To elucidate cellular pathways targeted by PTX and identify novel mechanisms of PTX resistance, we used a SILAC based quantitative proteomic approach to evaluate global changes of cellular protein abundance in HeLa cells. We identified 347 proteins involved in a number of biological processes including spindle assembly, mitotic exit, and extracellular adhesion whose abundance changes upon PTX treatment. Notably, the tumor suppressor PDCD4 involved in translation suppression was down-regulated by PTX. We demonstrated that PDCD4 is a cell-cycle regulated protein and that changes in its abundance are sufficient to alter PTX sensitivity in multiple human cancer cell lines. Immunoprecipitation of PDCD4-RNA complexes and RT-PCR revealed that PDCD4 mediated PTX sensitivity acts through its interaction with mRNA of UBE2S, a ubiquitin K11 linkage conjugating enzyme critical for mitotic exit. Lastly, high levels of PDCD4 in lung cancer tissues are positively correlated with the longer overall survival time of the examined lung cancer patients with PTX involved adjuvant therapy. Therefore, our proteomic screen for paclitaxel targets not only provided novel insight into the cellular resistance to paclitaxel via the PDCD4-mitotic exit regulation axis, but also offered a predictive biomarker for paclitaxel-based personalized chemotherapy in the treatment of lung cancer.
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Affiliation(s)
- Hui Xu
- †The Laboratory of Medical Genetics, Harbin Medical University, Harbin, China 150081
| | - Noah Dephoure
- ‡Department of Cell Biology, Harvard Medical School, Boston, Massachusetts 02115, United States
| | - Huiying Sun
- †The Laboratory of Medical Genetics, Harbin Medical University, Harbin, China 150081
| | - Haiyuan Zhang
- †The Laboratory of Medical Genetics, Harbin Medical University, Harbin, China 150081
| | - Fangfang Fan
- †The Laboratory of Medical Genetics, Harbin Medical University, Harbin, China 150081
| | - Jiawei Liu
- †The Laboratory of Medical Genetics, Harbin Medical University, Harbin, China 150081
| | - Xuelian Ning
- †The Laboratory of Medical Genetics, Harbin Medical University, Harbin, China 150081
| | - Shaochun Dai
- §The Tumor Hospital, Harbin Medical University, Harbin, China 150081
| | - Baogang Liu
- §The Tumor Hospital, Harbin Medical University, Harbin, China 150081
| | - Min Gao
- ∥The Fourth Affiliated Hospital, Harbin Medical University, Harbin, China 150001
| | - Songbin Fu
- †The Laboratory of Medical Genetics, Harbin Medical University, Harbin, China 150081
| | - Steven P Gygi
- ‡Department of Cell Biology, Harvard Medical School, Boston, Massachusetts 02115, United States
| | - Chunshui Zhou
- †The Laboratory of Medical Genetics, Harbin Medical University, Harbin, China 150081
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10
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Saleiro D, Mehrotra S, Kroczynska B, Beauchamp EM, Lisowski P, Majchrzak-Kita B, Bhagat TD, Stein BL, McMahon B, Altman JK, Kosciuczuk EM, Baker DP, Jie C, Jafari N, Thompson CB, Levine RL, Fish EN, Verma AK, Platanias LC. Central role of ULK1 in type I interferon signaling. Cell Rep 2015; 11:605-17. [PMID: 25892232 DOI: 10.1016/j.celrep.2015.03.056] [Citation(s) in RCA: 58] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2014] [Revised: 02/16/2015] [Accepted: 03/25/2015] [Indexed: 11/17/2022] Open
Abstract
We provide evidence that the Unc-51-like kinase 1 (ULK1) is activated during engagement of the type I interferon (IFN) receptor (IFNR). Our studies demonstrate that the function of ULK1 is required for gene transcription mediated via IFN-stimulated response elements (ISRE) and IFNγ activation site (GAS) elements and controls expression of key IFN-stimulated genes (ISGs). We identify ULK1 as an upstream regulator of p38α mitogen-activated protein kinase (MAPK) and establish that the regulatory effects of ULK1 on ISG expression are mediated possibly by engagement of the p38 MAPK pathway. Importantly, we demonstrate that ULK1 is essential for antiproliferative responses and type I IFN-induced antineoplastic effects against malignant erythroid precursors from patients with myeloproliferative neoplasms. Together, these data reveal a role for ULK1 as a key mediator of type I IFNR-generated signals that control gene transcription and induction of antineoplastic responses.
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Affiliation(s)
- Diana Saleiro
- Robert H. Lurie Comprehensive Cancer Center and Division of Hematology-Oncology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Swarna Mehrotra
- Robert H. Lurie Comprehensive Cancer Center and Division of Hematology-Oncology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Barbara Kroczynska
- Robert H. Lurie Comprehensive Cancer Center and Division of Hematology-Oncology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Elspeth M Beauchamp
- Robert H. Lurie Comprehensive Cancer Center and Division of Hematology-Oncology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA; Division of Hematology-Oncology, Department of Medicine, Jesse Brown Veterans Affairs Medical Center, Chicago, IL 60612, USA
| | - Pawel Lisowski
- Department of Molecular Biology, Institute of Genetics and Animal Breeding, 05-552 Jastrzebiec n/Warsaw, Poland; iPS Cell-Based Disease Modeling Group, Max-Delbrück-Center for Molecular Medicine (MDC) in the Helmholtz Association, 13092 Berlin, Germany
| | - Beata Majchrzak-Kita
- Toronto General Research Institute, University Health Network and Department of Immunology, University of Toronto, Toronto, ON M5G 2M1, Canada
| | - Tushar D Bhagat
- Department of Medicine, Albert Einstein College of Medicine, Bronx, NY 10461, USA
| | - Brady L Stein
- Robert H. Lurie Comprehensive Cancer Center and Division of Hematology-Oncology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Brandon McMahon
- Robert H. Lurie Comprehensive Cancer Center and Division of Hematology-Oncology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Jessica K Altman
- Robert H. Lurie Comprehensive Cancer Center and Division of Hematology-Oncology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA; Division of Hematology-Oncology, Department of Medicine, Jesse Brown Veterans Affairs Medical Center, Chicago, IL 60612, USA
| | - Ewa M Kosciuczuk
- Robert H. Lurie Comprehensive Cancer Center and Division of Hematology-Oncology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Darren P Baker
- Biogen Idec Inc., 14 Cambridge Center, Cambridge, MA 02142, USA
| | - Chunfa Jie
- Robert H. Lurie Comprehensive Cancer Center and Division of Hematology-Oncology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Nadereh Jafari
- Robert H. Lurie Comprehensive Cancer Center and Division of Hematology-Oncology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Craig B Thompson
- Cancer Biology and Genetics Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Ross L Levine
- Human Oncology and Pathogenesis Program, and Leukemia Service, Memorial Sloan Kettering Cancer Center; and Weill Cornell Medical College, New York, NY 10065, USA
| | - Eleanor N Fish
- Toronto General Research Institute, University Health Network and Department of Immunology, University of Toronto, Toronto, ON M5G 2M1, Canada
| | - Amit K Verma
- Department of Medicine, Albert Einstein College of Medicine, Bronx, NY 10461, USA
| | - Leonidas C Platanias
- Robert H. Lurie Comprehensive Cancer Center and Division of Hematology-Oncology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA; Division of Hematology-Oncology, Department of Medicine, Jesse Brown Veterans Affairs Medical Center, Chicago, IL 60612, USA.
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11
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Stat1 stimulates cap-independent mRNA translation to inhibit cell proliferation and promote survival in response to antitumor drugs. Proc Natl Acad Sci U S A 2015; 112:E2149-55. [PMID: 25870277 DOI: 10.1073/pnas.1420671112] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
The signal transducer and activator of transcription 1 (Stat1) functions as a tumor suppressor via immune regulatory and cell-autonomous pathways. Herein, we report a previously unidentified cell-autonomous Stat1 function, which is its ability to exhibit both antiproliferative and prosurvival properties by facilitating translation of mRNAs encoding for the cyclin-dependent kinase inhibitor p27(Kip1) and antiapoptotic proteins X-linked inhibitor of apoptosis and B-cell lymphoma xl. Translation of the select mRNAs requires the transcriptional function of Stat1, resulting in the up-regulation of the p110γ subunit of phosphoinositide 3-kinase (PI3K) class IB and increased expression of the translational repressor translation initiation factor 4E (eIF4E)-binding protein 1 (4EBP1). Increased PI3Kγ signaling promotes the degradation of the eIF4A inhibitor programmed cell death protein 4, which favors the cap-independent translation of the select mRNAs under conditions of general inhibition of protein synthesis by up-regulated eIF4E-binding protein 1. As such, Stat1 inhibits cell proliferation but also renders cells increasingly resistant to antiproliferative effects of pharmacological inhibitors of PI3K and/or mammalian target of rapamycin. Stat1 also protects Ras-transformed cells from the genotoxic effects of doxorubicin in culture and immune-deficient mice. Our findings demonstrate an important role of mRNA translation in the cell-autonomous Stat1 functions, with implications in tumor growth and treatment with chemotherapeutic drugs.
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12
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Argüello RJ, Rodriguez Rodrigues C, Gatti E, Pierre P. Protein synthesis regulation, a pillar of strength for innate immunity? Curr Opin Immunol 2014; 32:28-35. [PMID: 25553394 DOI: 10.1016/j.coi.2014.12.001] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2014] [Revised: 12/04/2014] [Accepted: 12/10/2014] [Indexed: 12/31/2022]
Abstract
Recognition of pathogen derived molecules by Pattern Recognition Receptors (PRR) induces the production of cytokines (i.e. type I interferons) that stimulate the surrounding cells to transcribe and translate hundreds of genes, in order to prevent further infection and organize the immune response. Here, we report on the rising matter that metabolism sensing and gene expression control at the level of mRNA translation, allow swift responses that mobilize host defenses and coordinate innate responses to infection.
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Affiliation(s)
- Rafael J Argüello
- Centre d'Immunologie de Marseille-Luminy, Aix-Marseille Université, U2M, 13288 Marseille, France; INSERM, U1104, 13288 Marseille, France; CNRS, UMR 7280, 13288 Marseille, France
| | - Christian Rodriguez Rodrigues
- Centre d'Immunologie de Marseille-Luminy, Aix-Marseille Université, U2M, 13288 Marseille, France; INSERM, U1104, 13288 Marseille, France; CNRS, UMR 7280, 13288 Marseille, France
| | - Evelina Gatti
- Centre d'Immunologie de Marseille-Luminy, Aix-Marseille Université, U2M, 13288 Marseille, France; INSERM, U1104, 13288 Marseille, France; CNRS, UMR 7280, 13288 Marseille, France; Institute for Research in Biomedicine - iBiMED and Aveiro Health Sciences Program, University of Aveiro, 3810-193 Aveiro, Portugal.
| | - Philippe Pierre
- Centre d'Immunologie de Marseille-Luminy, Aix-Marseille Université, U2M, 13288 Marseille, France; INSERM, U1104, 13288 Marseille, France; CNRS, UMR 7280, 13288 Marseille, France; Institute for Research in Biomedicine - iBiMED and Aveiro Health Sciences Program, University of Aveiro, 3810-193 Aveiro, Portugal.
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13
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Fish EN, Platanias LC. Interferon receptor signaling in malignancy: a network of cellular pathways defining biological outcomes. Mol Cancer Res 2014; 12:1691-703. [PMID: 25217450 DOI: 10.1158/1541-7786.mcr-14-0450] [Citation(s) in RCA: 65] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
IFNs are cytokines with important antiproliferative activity and exhibit key roles in immune surveillance against malignancies. Early work initiated over three decades ago led to the discovery of IFN receptor activated Jak-Stat pathways and provided important insights into mechanisms for transcriptional activation of IFN-stimulated genes (ISG) that mediate IFN biologic responses. Since then, additional evidence has established critical roles for other receptor-activated signaling pathways in the induction of IFN activities. These include MAPK pathways, mTOR cascades, and PKC pathways. In addition, specific miRNAs appear to play a significant role in the regulation of IFN signaling responses. This review focuses on the emerging evidence for a model in which IFNs share signaling elements and pathways with growth factors and tumorigenic signals but engage them in a distinctive manner to mediate antiproliferative and antiviral responses.
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Affiliation(s)
- Eleanor N Fish
- Toronto General Research Institute, University Health Network and Department of Immunology, University of Toronto, Toronto, Ontario, Canada
| | - Leonidas C Platanias
- Robert H. Lurie Comprehensive Cancer Center and Division of Hematology-Oncology, Northwestern University Medical School and Jesse Brown VA Medical Center, Chicago, Illinois.
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14
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Regulatory effects of SKAR in interferon α signaling and its role in the generation of type I IFN responses. Proc Natl Acad Sci U S A 2014; 111:11377-82. [PMID: 25049393 DOI: 10.1073/pnas.1405250111] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
We provide evidence that S6 kinase 1 (S6K1) Aly/REF-like target (SKAR) is engaged in IFN-α signaling and plays a key role in the generation of IFN responses. Our data demonstrate that IFN-α induces phosphorylation of SKAR, which is mediated by either the p90 ribosomal protein S6 kinase (RSK) or p70 S6 kinase (S6K1), in a cell type-specific manner. This type I IFN-inducible phosphorylation of SKAR results in enhanced interaction with the eukaryotic initiation factor (eIF)4G and recruitment of activated RSK1 to 5' cap mRNA. Our studies also establish that SKAR is present in cap-binding CBP80 immune complexes and that this interaction is mediated by eIF4G. We demonstrate that inducible protein expression of key IFN-α-regulated protein products such as ISG15 and p21(WAF1/CIP1) requires SKAR activity. Importantly, our studies define a requirement for SKAR in the generation of IFN-α-dependent inhibitory effects on malignant hematopoietic progenitors from patients with chronic myeloid leukemia or myeloproliferative neoplasms. Taken altogether, these findings establish critical and essential roles for SKAR in the regulation of mRNA translation of IFN-sensitive genes and induction of IFN-α biological responses.
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15
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Gong L, Wang H, Huang J, Hu M, Hu Z, Zhong G. Camptothecin-induced expression of programmed cell death gene 11 in Spodoptera litura. PEST MANAGEMENT SCIENCE 2014; 70:603-609. [PMID: 23749428 DOI: 10.1002/ps.3588] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2013] [Revised: 04/15/2013] [Accepted: 06/07/2013] [Indexed: 06/02/2023]
Abstract
BACKGROUND Camptothecin, one of the main active components of extract from the bark of the Chinese camptotheca tree, has been reported as a potent insecticide against various insect species. However, the mechanism of action of camptothecin as a botanical pesticide is not completely understood. RESULTS In this study, the full-length cDNA (GeneBank number JF681972) of Spodoptera litura programmed cell death protein 11 (pcdp 11) isoform 1 was cloned, sequenced and characterised. Quantitative real-time PCR (qRT-PCR) data showed that pcdp 11 was differentially expressed during the developmental stages, with significantly high expression during the transition from egg to larva and larva to pupa. Furthermore, pcdp 11 was upregulated in a time-dependent manner in SL-1 cells after treatment with 1.2 µg mL(-1) of camptothecin. The induced expression profile of pcdp 11 in the larval midgut after feeding camptothecin was visualised by fluorescence in situ hybridisation (FISH) and further quantified by qRT-PCR. Apoptosis in camptothecin-treated larval midguts was confirmed using terminal deoxynucleotidyl transferase dUTP nick end labelling (TUNEL) staining. CONCLUSION The results reveal a clear functional link between pcdp 11 expression and camptothecin-induced apoptosis, and prove that camptothecin exhibits strong toxicity towards S. litura by inducing midgut epithelial cell apoptosis.
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Affiliation(s)
- Liang Gong
- Key Laboratory of Pesticide and Chemical Biology, College of Natural Resources and Environment, South China Agricultural University, Guangzhou, Guangdong Province, China
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16
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Ge C, Song J, Chen L, Wang L, Chen Y, Liu X, Zhang Y, Zhang L, Zhang M. Atheroprotective pulsatile flow induces ubiquitin-proteasome-mediated degradation of programmed cell death 4 in endothelial cells. PLoS One 2014; 9:e91564. [PMID: 24626527 PMCID: PMC3953479 DOI: 10.1371/journal.pone.0091564] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2013] [Accepted: 02/12/2014] [Indexed: 01/18/2023] Open
Abstract
Objectives We recently found low level of tumor suppressor programmed cell death 4 (PDCD4) associated with reduced atherosclerotic plaque area (unpublished). We investigated whether atheroprotective unidirectional pulsatile shear stress affects the expression of PDCD4 in endothelial cells. Methods and Results En face co-immunostaining of the mouse aortic arch revealed a low level of PDCD4 in endothelial cells undergoing pulsatile shear stress. Application of unidirectional pulsatile shear stress to human umbilical vein endothelial cells (HUVECs) decreased PDCD4 protein but not mRNA level. Immunoprecipitation revealed that pulsatile shear stress induced the coupling of ubiquitin with PDCD4 expression. The phosphatidyl inositol 3-kinase (PI3K)/Akt pathway was involved in this ubiquitin-proteasome–mediated degradation of PDCD4. Gain of function and loss of function experiments showed that PDCD4 induced turnover (proliferation and apoptosis) of HUVECs. Low PDCD4 level was associated with reduced proliferation but not apoptosis or phosphorylation of endothelial nitric oxide synthase caused by pulsatile shear stress to help maintain the homeostasis of endothelial cells. Conclusions Pulsatile shear stress induces ubiquitin-proteasome–mediated degradation of PDCD4 via a PI3K/Akt pathway in HUVECs. PDCD4 induces turnover (proliferation and apoptosis) of HUVECs. Low PDCD4 level is associated with reduced proliferation for maintenance of HUVEC homeostasis under pulsatile shear stress.
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Affiliation(s)
- Cheng Ge
- Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education and Chinese Ministry of Health, Department of Cardiology, Shandong University Qilu Hospital, Jinan, Shandong, People’s Republic of China
| | - Jiantao Song
- Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education and Chinese Ministry of Health, Department of Cardiology, Shandong University Qilu Hospital, Jinan, Shandong, People’s Republic of China
| | - Liang Chen
- Department of Emergency, Shandong University Qilu Hospital, Jinan, Shandong, People’s Republic of China
| | - Lin Wang
- Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education and Chinese Ministry of Health, Department of Cardiology, Shandong University Qilu Hospital, Jinan, Shandong, People’s Republic of China
| | - Yifei Chen
- Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education and Chinese Ministry of Health, Department of Cardiology, Shandong University Qilu Hospital, Jinan, Shandong, People’s Republic of China
| | - Xinxin Liu
- Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education and Chinese Ministry of Health, Department of Cardiology, Shandong University Qilu Hospital, Jinan, Shandong, People’s Republic of China
| | - Yu Zhang
- Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education and Chinese Ministry of Health, Department of Cardiology, Shandong University Qilu Hospital, Jinan, Shandong, People’s Republic of China
| | - Lining Zhang
- Department of Immunology, School of Medicine, Shandong University, Jinan, Shandong, People’s Republic of China
| | - Mei Zhang
- Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education and Chinese Ministry of Health, Department of Cardiology, Shandong University Qilu Hospital, Jinan, Shandong, People’s Republic of China
- * E-mail:
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17
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Kroczynska B, Mehrotra S, Arslan AD, Kaur S, Platanias LC. Regulation of interferon-dependent mRNA translation of target genes. J Interferon Cytokine Res 2014; 34:289-96. [PMID: 24559173 DOI: 10.1089/jir.2013.0148] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Interferons (IFNs) are released by cells on exposure to various stimuli, including viruses, double-stranded RNA, and other cytokines and various polypeptides. These IFNs play important physiological and pathophysiological roles in humans. Many clinical studies have established activity for these cytokines in the treatment of several malignancies, viral syndromes, and autoimmune disorders. In this review, the regulatory effects of type I and II IFN receptors on the translation-initiation process mediated by mechanistic target of rapamycin (mTOR) and mitogen-activated protein kinase (MAPK) pathways and the known mechanisms of control of mRNA translation of IFN-stimulated genes are summarized and discussed.
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Affiliation(s)
- Barbara Kroczynska
- 1 Division of Hematology-Oncology, Robert H. Lurie Comprehensive Cancer Center, Northwestern University Medical School , Chicago, Illinois
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18
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Kaur S, Kroczynska B, Sharma B, Sassano A, Arslan AD, Majchrzak-Kita B, Stein BL, McMahon B, Altman JK, Su B, Calogero RA, Fish EN, Platanias LC. Critical roles for Rictor/Sin1 complexes in interferon-dependent gene transcription and generation of antiproliferative responses. J Biol Chem 2014; 289:6581-6591. [PMID: 24469448 DOI: 10.1074/jbc.m113.537852] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
We provide evidence that type I IFN-induced STAT activation is diminished in cells with targeted disruption of the Rictor gene, whose protein product is a key element of mTOR complex 2. Our studies show that transient or stable knockdown of Rictor or Sin1 results in defects in activation of elements of the STAT pathway and reduced STAT-DNA binding complexes. This leads to decreased expression of several IFN-inducible genes that mediate important biological functions. Our studies also demonstrate that Rictor and Sin1 play essential roles in the generation of the suppressive effects of IFNα on malignant erythroid precursors from patients with myeloproliferative neoplasms. Altogether, these findings provide evidence for critical functions for Rictor/Sin1 complexes in type I IFN signaling and the generation of type I IFN antineoplastic responses.
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Affiliation(s)
- Surinder Kaur
- Robert H. Lurie Comprehensive Cancer Center and Division of Hematology-Oncology, Department of Medicine, Northwestern University Medical School, Chicago, Illinois 60611
| | - Barbara Kroczynska
- Robert H. Lurie Comprehensive Cancer Center and Division of Hematology-Oncology, Department of Medicine, Northwestern University Medical School, Chicago, Illinois 60611
| | - Bhumika Sharma
- Robert H. Lurie Comprehensive Cancer Center and Division of Hematology-Oncology, Department of Medicine, Northwestern University Medical School, Chicago, Illinois 60611
| | - Antonella Sassano
- Robert H. Lurie Comprehensive Cancer Center and Division of Hematology-Oncology, Department of Medicine, Northwestern University Medical School, Chicago, Illinois 60611
| | - Ahmet Dirim Arslan
- Robert H. Lurie Comprehensive Cancer Center and Division of Hematology-Oncology, Department of Medicine, Northwestern University Medical School, Chicago, Illinois 60611
| | - Beata Majchrzak-Kita
- Toronto Research Institute, University Health Network and Department of Immunology, University of Toronto, Toronto, Ontario M5S 2J7, Canada
| | - Brady L Stein
- Robert H. Lurie Comprehensive Cancer Center and Division of Hematology-Oncology, Department of Medicine, Northwestern University Medical School, Chicago, Illinois 60611
| | - Brandon McMahon
- Robert H. Lurie Comprehensive Cancer Center and Division of Hematology-Oncology, Department of Medicine, Northwestern University Medical School, Chicago, Illinois 60611
| | - Jessica K Altman
- Robert H. Lurie Comprehensive Cancer Center and Division of Hematology-Oncology, Department of Medicine, Northwestern University Medical School, Chicago, Illinois 60611; Division of Hematology-Oncology, Department of Medicine, Jesse Brown Veterans Affairs Medical Center, Chicago, Illinois 60612
| | - Bing Su
- Department of Immunobiology, Yale University School of Medicine, New Haven, Connecticut 06520
| | - Raffaele A Calogero
- Department of Biotechnology and Health Sciences, University of Turin, 8 Turin, Italy
| | - Eleanor N Fish
- Toronto Research Institute, University Health Network and Department of Immunology, University of Toronto, Toronto, Ontario M5S 2J7, Canada
| | - Leonidas C Platanias
- Robert H. Lurie Comprehensive Cancer Center and Division of Hematology-Oncology, Department of Medicine, Northwestern University Medical School, Chicago, Illinois 60611; Division of Hematology-Oncology, Department of Medicine, Jesse Brown Veterans Affairs Medical Center, Chicago, Illinois 60612.
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19
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Cohen TS, Prince AS. Bacterial pathogens activate a common inflammatory pathway through IFNλ regulation of PDCD4. PLoS Pathog 2013; 9:e1003682. [PMID: 24098127 PMCID: PMC3789769 DOI: 10.1371/journal.ppat.1003682] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2013] [Accepted: 08/21/2013] [Indexed: 12/24/2022] Open
Abstract
The type III interferon (IFNλ) receptor IL-28R is abundantly expressed in the respiratory tract and has been shown essential for host defense against some viral pathogens, however no data are available concerning its role in the innate immune response to bacterial pathogens. Staphylococcus aureus and Pseudomonas aeruginosa induced significant production of IFNλ in the lung, and clearance of these bacteria from the lung was significantly increased in IL-28R null mice compared to controls. Improved bacterial clearance correlated with reduced lung pathology and a reduced ratio of pro- vs anti-inflammatory cytokines in the airway. In human epithelial cells IFNλ inhibited miR-21 via STAT3 resulting in upregulation of PDCD4, a protein known to promote inflammatory signaling. In vivo 18 hours following infection with either pathogen, miR-21 was significantly reduced and PDCD4 increased in the lungs of wild type compared to IL-28R null mice. Infection of PDCD4 null mice with USA300 resulted in improved clearance, reduced pathology, and reduced inflammatory cytokine production. These data suggest that during bacterial pneumonia IFNλ promotes inflammation by inhibiting miR-21 regulation of PDCD4. The role of interferons (types I, II, and III) in viral and bacterial infections has been a topic of intense research over the last decade. The contribution of the type I interferons during bacterial pneumonias particularly has been shown to be highly variable depending on the specific pathogen. Our data for the first time demonstrate that type III interferon plays a significant role in the pathogenesis of bacterial pneumonia, and its contribution is similar in both Gram positive and Gram negative infections. We show in epithelial cells that miR-21 and PDCD4 are downstream effectors of type III interferon that prolong production of inflammatory cytokines. Utilizing mice that lack the receptor for type III interferon or PDCD4, we show that inhibiting this pathway improves bacterial clearance from the airways and lung tissue. These data suggest novel targets for therapy in a variety of bacterial pneumonias.
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Affiliation(s)
- Taylor S. Cohen
- Department of Pediatrics, Columbia University, New York, New York, United States of America
| | - Alice S. Prince
- Department of Pediatrics, Columbia University, New York, New York, United States of America
- * E-mail:
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20
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Mavrommatis E, Fish EN, Platanias LC. The schlafen family of proteins and their regulation by interferons. J Interferon Cytokine Res 2013; 33:206-10. [PMID: 23570387 DOI: 10.1089/jir.2012.0133] [Citation(s) in RCA: 104] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
The Schlafen (SLFN) family of proteins includes several mouse and human members. There is emerging evidence that members of this family of proteins are involved in important functions, such as the control of cell proliferation, induction of immune responses, and the regulation of viral replication. These proteins span across all species with great diversity, with 10 murine and 5 human isoforms. Recent work has established that mouse and human SLFN proteins are regulated by interferons (IFNs). Several Slfn genes were shown to be induced as classical interferon-stimulated genes, and emerging evidence suggests that these proteins play important roles in the growth inhibitory and antineoplastic effects of IFNs. In the current review, the known properties of mouse and human SLFNs are reviewed, and the implications of their emerging functions are discussed.
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Affiliation(s)
- Evangelos Mavrommatis
- Robert H. Lurie Comprehensive Cancer Center, Northwestern University Medical School, Chicago, IL 60611, USA
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21
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Mehrotra S, Sharma B, Joshi S, Kroczynska B, Majchrzak B, Stein BL, McMahon B, Altman JK, Licht JD, Baker DP, Eklund EA, Wickrema A, Verma A, Fish EN, Platanias LC. Essential role for the Mnk pathway in the inhibitory effects of type I interferons on myeloproliferative neoplasm (MPN) precursors. J Biol Chem 2013; 288:23814-22. [PMID: 23814052 DOI: 10.1074/jbc.m113.476192] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
The mechanisms of generation of the antineoplastic effects of interferons (IFNs) in malignant hematopoietic cells remain to be precisely defined. We examined the activation of type I IFN-dependent signaling pathways in malignant cells transformed by Jak2V617F, a critical pathogenic mutation in myeloproliferative neoplasms (MPNs). Our studies demonstrate that during engagement of the type I IFN receptor (IFNAR), there is activation of Jak-Stat pathways and also engagement of Mnk kinases. Activation of Mnk kinases is regulated by the Mek/Erk pathway and is required for the generation of IFN-induced growth inhibitory responses, but Mnk kinase activation does not modulate IFN-regulated Jak-Stat signals. We demonstrate that for type I IFNs to exert suppressive effects in malignant hematopoietic progenitors from patients with polycythemia vera, induction of Mnk kinase activity is required, as evidenced by studies involving pharmacological inhibition of Mnk or siRNA-mediated Mnk knockdown. Altogether, these findings provide evidence for key and essential roles of the Mnk kinase pathway in the generation of the antineoplastic effects of type I IFNs in Jak2V617F-dependent MPNs.
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Affiliation(s)
- Swarna Mehrotra
- Robert H. Lurie Comprehensive Cancer Center and Division of Hematology-Oncology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois 60611, USA
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22
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Inhibition of Mnk kinase activity by cercosporamide and suppressive effects on acute myeloid leukemia precursors. Blood 2013; 121:3675-81. [PMID: 23509154 DOI: 10.1182/blood-2013-01-477216] [Citation(s) in RCA: 79] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Mnk kinases regulate the phosphorylation and activation of the eukaryotic initiation factor 4E (eIF4E), a protein that plays key roles in the initiation of messenger RNA translation and whose activity is critical for various cellular functions. eIF4E is deregulated in acute myeloid leukemia (AML), and its aberrant activity contributes to leukemogenesis. We determined whether cercosporamide, an antifungal agent that was recently shown to act as a unique Mnk inhibitor, exhibits antileukemic properties. Treatment of AML cells with cercosporamide resulted in a dose-dependent suppression of eIF4E phosphorylation. Such suppression of Mnk kinase activity and eIF4E phosphorylation by cercosporamide resulted in dose-dependent suppressive effects on primitive leukemic progenitors (CFU-L) from AML patients and enhanced the antileukemic properties of cytarabine (Ara-C) or mammalian target of rapamycin (mTOR) complex 1 inhibition. Similarly, the combination of cercosporamide with cytarabine resulted in enhanced antileukemic responses in a xenograft mouse model in vivo. Altogether, this work demonstrates that the unique Mnk inhibitor cercosporamide suppresses phosphorylation of eIF4E and exhibits antileukemic effects, in support of future clinical-translational efforts involving combinations of Mnk inhibitors with cytarabine and/or mTOR inhibitors for the treatment of AML.
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Abstract
By controlling gene expression at the level of mRNA translation, organisms temporally and spatially respond swiftly to an ever-changing array of environmental conditions. This capacity for rapid response is ideally suited for mobilizing host defenses and coordinating innate responses to infection. Not surprisingly, a growing list of pathogenic microbes target host mRNA translation for inhibition. Infection with bacteria, protozoa, viruses, and fungi has the capacity to interfere with ongoing host protein synthesis and thereby trigger and/or suppress powerful innate responses. This review discusses how diverse pathogens manipulate the host translation machinery and the impact of these interactions on infection biology and the immune response.
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Affiliation(s)
- Ian Mohr
- Department of Microbiology, NYU Cancer Institute, New York University School of Medicine, New York, NY 10016, USA
| | - Nahum Sonenberg
- Department of Biochemistry, Goodman Cancer Centre, McGill University, Montreal, QC H3A 1A3, Canada
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