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Menshawy NE, El-Ghonemy MS, Ebrahim MA, Fahmi MW, Saif M, Denewer M, El-Ashwah S. Aberrant ecotropic viral integration site-1 (EVI-1) and myocyte enhancer factor 2 C gene (MEF2C) in adult acute myeloid leukemia are associated with adverse t (9:22) & 11q23 rearrangements. Ann Hematol 2024; 103:2355-2364. [PMID: 38710877 PMCID: PMC11224084 DOI: 10.1007/s00277-024-05779-9] [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: 12/30/2023] [Accepted: 04/23/2024] [Indexed: 05/08/2024]
Abstract
Acute myeloid leukemia (AML) shows multiple chromosomal translocations & point mutations which can be used to refine risk-adapted therapy in AML patients. Ecotropic viral integration site-1 (EVI-1) & myocyte enhancer factor 2 C gene (MEF2C) are key regulatory transcription factors in hematopoiesis and leukemogenesis & both drive immune escape. This prospective study involved 80 adult de novo AML patients recruited from Oncology Center, Mansoura University, between March 2019 and July 2021. The MEF2C and EVI1 expression were measured using a Taqman probe-based qPCR assay. The results revealed that EVI1 and MEF2C expression were significantly elevated in AML patients as compared to control subjects (p = 0.001. 0.007 respectively). Aberrant expressions of EVI1 and MEF2C showed a significant negative correlation with hemoglobin levels (p = 0.034, 0.025 respectively), & bone marrow blasts (p = 0.007, 0.002 respectively). 11q23 translocation was significantly associated with EVI1 and MEF2C (p = 0.004 and 0.02 respectively). Also, t (9;22) was significantly associated with EVI1 and MEF2C (p = 0.01 and 0.03 respectively), higher expression of EVI1 and MEF2C were significantly associated with inferior outcome after induction therapy (p = 0.001 and 0.018 respectively) and shorter overall survival (p = 0.001, 0.014 respectively). In conclusion, EVI1 & MEF2C were significantly expressed in AML cases. EVI1 & MEF2C overexpression were significantly associated with 11q23 rearrangements and t (9;22) and were indicators for poor outcome in adult AML patients; These results could be a step towards personalized therapy in those patients.
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Affiliation(s)
- Nadia El Menshawy
- Clinical Pathology, Hematology unit, Faculty of Medicine, Mansoura University, Mansoura, 35516, Egypt
| | - Mohamed S El-Ghonemy
- Clinical Pathology, Hematology unit, Faculty of Medicine, Mansoura University, Mansoura, 35516, Egypt
| | - Mohamed A Ebrahim
- Medical Oncology Unit, Oncology Center, Faculty of Medicine, Mansoura University, Mansoura, 35516, Egypt
| | - Maryan Waheeb Fahmi
- Medical Oncology Unit, Oncology Center, Faculty of Medicine, Mansoura University, Mansoura, 35516, Egypt.
| | - Maha Saif
- Medical Oncology Unit, Oncology Center, Faculty of Medicine, Mansoura University, Mansoura, 35516, Egypt
| | - May Denewer
- Clinical Hematology Unit, Oncology Center, Faculty of Medicine, Mansoura University, Mansoura, 35516, Egypt
| | - Shaimaa El-Ashwah
- Clinical Hematology Unit, Oncology Center, Faculty of Medicine, Mansoura University, Mansoura, 35516, Egypt
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2
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Liao B, Wang J, Yuan Y, Luo H, Ouyang X. Biological roles of SLC16A1-AS1 lncRNA and its clinical impacts in tumors. Cancer Cell Int 2024; 24:122. [PMID: 38555465 PMCID: PMC10981830 DOI: 10.1186/s12935-024-03285-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2023] [Accepted: 02/27/2024] [Indexed: 04/02/2024] Open
Abstract
Recent studies have increasingly highlighted the aberrant expression of SLC16A1-AS1 in a variety of tumor types, where it functions as either an oncogene or a tumor suppressor in the pathogenesis of different cancers. The expression levels of SLC16A1-AS1 have been found to significantly correlate with clinical features and the prognosis of cancer patients. Furthermore, SLC16A1-AS1 modulates a range of cellular functions, including proliferation, migration, and invasion, through its interactions with diverse molecules and signaling pathways. This review examines the latest evidence regarding the role of SLC16A1-AS1 in the progression of various tumors and explores its potential clinical applications as a novel prognostic and diagnostic biomarker. Our comprehensive review aims to deepen the understanding of SLC16A1-AS1's multifaceted role in oncology, underscoring its potential as a significant biomarker and therapeutic target.
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Affiliation(s)
- Bing Liao
- Department of Otorhinolaryngology, The Second Affiliated Hospital, Jiangxi Medical College, Nanchang University, Nanchang, 330008, Jiangxi, China
| | - Jialing Wang
- Department of Gastrointestinal Surgery, The Second Affiliated Hospital, Jiangxi Medical College, Nanchang University, Nanchang, 330008, Jiangxi, China
| | - Yalin Yuan
- Second School of Clinical Medicine, Jiangxi Medical College, Nanchang University, Nanchang, 330008, Jiangxi, China
| | - Hongliang Luo
- Department of Gastrointestinal Surgery, The Second Affiliated Hospital, Jiangxi Medical College, Nanchang University, Nanchang, 330008, Jiangxi, China
| | - Xi Ouyang
- Department of Gastrointestinal Surgery, The Second Affiliated Hospital, Jiangxi Medical College, Nanchang University, Nanchang, 330008, Jiangxi, China.
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3
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Bassani B, Simonetti G, Cancila V, Fiorino A, Ciciarello M, Piva A, Khorasani AM, Chiodoni C, Lecis D, Gulino A, Fonzi E, Botti L, Portararo P, Costanza M, Brambilla M, Colombo G, Schwaller J, Tzankov A, Ponzoni M, Ciceri F, Bolli N, Curti A, Tripodo C, Colombo MP, Sangaletti S. ZEB1 shapes AML immunological niches, suppressing CD8 T cell activity while fostering Th17 cell expansion. Cell Rep 2024; 43:113794. [PMID: 38363677 DOI: 10.1016/j.celrep.2024.113794] [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: 03/21/2023] [Revised: 11/07/2023] [Accepted: 01/30/2024] [Indexed: 02/18/2024] Open
Abstract
Acute myeloid leukemia (AML) progression is influenced by immune suppression induced by leukemia cells. ZEB1, a critical transcription factor in epithelial-to-mesenchymal transition, demonstrates immune regulatory functions in AML. Silencing ZEB1 in leukemic cells reduces engraftment and extramedullary disease in immune-competent mice, activating CD8 T lymphocytes and limiting Th17 cell expansion. ZEB1 in AML cells directly promotes Th17 cell development that, in turn, creates a self-sustaining loop and a pro-invasive phenotype, favoring transforming growth factor β (TGF-β), interleukin-23 (IL-23), and SOCS2 gene transcription. In bone marrow biopsies from AML patients, immunohistochemistry shows a direct correlation between ZEB1 and Th17. Also, the analysis of ZEB1 expression in larger datasets identifies two distinct AML groups, ZEB1high and ZEB1low, each with specific immunological and molecular traits. ZEB1high patients exhibit increased IL-17, SOCS2, and TGF-β pathways and a negative association with overall survival. This unveils ZEB1's dual role in AML, entwining pro-tumoral and immune regulatory capacities in AML blasts.
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Affiliation(s)
- Barbara Bassani
- Molecular Immunology Unit, Department of Experimental Oncology, Fondazione IRCCS Istituto Nazionale Tumori, Milan, Italy
| | - Giorgia Simonetti
- Biosciences Laboratory, IRCCS Istituto Romagnolo per lo Studio dei Tumori (IRST) "Dino Amadori", Meldola, Italy
| | - Valeria Cancila
- Tumor Immunology Unit, Department of Health Sciences, Human Pathology Section, School of Medicine, University of Palermo, 90133 Palermo, Italy
| | - Antonio Fiorino
- Predictive Medicine: Molecular Bases of Genetic Risk Unit, Department of Experimental Oncology, Fondazione IRCCS Istituto Nazionale Tumori, Milan, Italy
| | - Marilena Ciciarello
- CNR Institute of Molecular Genetics "Luigi Luca Cavalli-Sforza," Unit of Bologna, Bologna, Italy; IRCCS Istituto Ortopedico Rizzoli, Bologna, Italy; Department of Medical and Surgical Sciences (DIMEC), University of Bologna, Bologna, Italy
| | - Annamaria Piva
- Molecular Immunology Unit, Department of Experimental Oncology, Fondazione IRCCS Istituto Nazionale Tumori, Milan, Italy
| | - Arman Mandegar Khorasani
- Molecular Immunology Unit, Department of Experimental Oncology, Fondazione IRCCS Istituto Nazionale Tumori, Milan, Italy
| | - Claudia Chiodoni
- Molecular Immunology Unit, Department of Experimental Oncology, Fondazione IRCCS Istituto Nazionale Tumori, Milan, Italy
| | - Daniele Lecis
- Molecular Immunology Unit, Department of Experimental Oncology, Fondazione IRCCS Istituto Nazionale Tumori, Milan, Italy
| | | | - Eugenio Fonzi
- Unit of Biostatistics and Clinical Trials, IRCCS Istituto Romagnolo per lo Studio dei Tumori (IRST) "Dino Amadori," Meldola, Forlì-Cesena, Italy
| | - Laura Botti
- Molecular Immunology Unit, Department of Experimental Oncology, Fondazione IRCCS Istituto Nazionale Tumori, Milan, Italy
| | - Paola Portararo
- Molecular Immunology Unit, Department of Experimental Oncology, Fondazione IRCCS Istituto Nazionale Tumori, Milan, Italy
| | - Massimo Costanza
- Neuro-Oncology Unit, Department of Clinical Neuroscience, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Marta Brambilla
- Medical Oncology Department, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy
| | - Giorgia Colombo
- Department of Pharmaceutical Sciences, Università del Piemonte Orientale, Novara, Italy
| | - Juerg Schwaller
- University Children's Hospital Basel & Department of Biomedicine, University of Basel, Basel, Switzerland
| | - Alexandar Tzankov
- Institute of Medical Genetics and Pathology, University Hospital Basel, University of Basel, Basel, Switzerland
| | - Maurilio Ponzoni
- IRCCS Ospedale S. Raffaele, University Vita-Salute San Raffaele, Milan, Italy
| | - Fabio Ciceri
- IRCCS Ospedale S. Raffaele, University Vita-Salute San Raffaele, Milan, Italy
| | - Niccolò Bolli
- Hematology Division, Foundation IRCCS Ca' Granda Ospedale Maggiore Policlinico, 20122 Milan, Italy; Department of Oncology and Hemato-Oncology, University of Milan, 20122 Milan, Italy
| | - Antonio Curti
- Department of Experimental, Diagnostic and Specialty Medicine - DIMES, Institute of Hematology "Seràgnoli," Bologna, Italy
| | - Claudio Tripodo
- Tumor Immunology Unit, Department of Health Sciences, Human Pathology Section, School of Medicine, University of Palermo, 90133 Palermo, Italy; IFOM-ETS-The AIRC Institute of Molecular Oncology, Milan, Italy
| | - Mario P Colombo
- Molecular Immunology Unit, Department of Experimental Oncology, Fondazione IRCCS Istituto Nazionale Tumori, Milan, Italy.
| | - Sabina Sangaletti
- Molecular Immunology Unit, Department of Experimental Oncology, Fondazione IRCCS Istituto Nazionale Tumori, Milan, Italy.
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4
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Shafi O, Siddiqui G, Jaffry HA. The benign nature and rare occurrence of cardiac myxoma as a possible consequence of the limited cardiac proliferative/ regenerative potential: a systematic review. BMC Cancer 2023; 23:1245. [PMID: 38110859 PMCID: PMC10726542 DOI: 10.1186/s12885-023-11723-3] [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: 08/08/2023] [Accepted: 12/05/2023] [Indexed: 12/20/2023] Open
Abstract
BACKGROUND Cardiac Myxoma is a primary tumor of heart. Its origins, rarity of the occurrence of primary cardiac tumors and how it may be related to limited cardiac regenerative potential, are not yet entirely known. This study investigates the key cardiac genes/ transcription factors (TFs) and signaling pathways to understand these important questions. METHODS Databases including PubMed, MEDLINE, and Google Scholar were searched for published articles without any date restrictions, involving cardiac myxoma, cardiac genes/TFs/signaling pathways and their roles in cardiogenesis, proliferation, differentiation, key interactions and tumorigenesis, with focus on cardiomyocytes. RESULTS The cardiac genetic landscape is governed by a very tight control between proliferation and differentiation-related genes/TFs/pathways. Cardiac myxoma originates possibly as a consequence of dysregulations in the gene expression of differentiation regulators including Tbx5, GATA4, HAND1/2, MYOCD, HOPX, BMPs. Such dysregulations switch the expression of cardiomyocytes into progenitor-like state in cardiac myxoma development by dysregulating Isl1, Baf60 complex, Wnt, FGF, Notch, Mef2c and others. The Nkx2-5 and MSX2 contribute predominantly to both proliferation and differentiation of Cardiac Progenitor Cells (CPCs), may possibly serve roles based on the microenvironment and the direction of cell circuitry in cardiac tumorigenesis. The Nkx2-5 in cardiac myxoma may serve to limit progression of tumorigenesis as it has massive control over the proliferation of CPCs. The cardiac cell type-specific genetic programming plays governing role in controlling the tumorigenesis and regenerative potential. CONCLUSION The cardiomyocytes have very limited proliferative and regenerative potential. They survive for long periods of time and tightly maintain the gene expression of differentiation genes such as Tbx5, GATA4 that interact with tumor suppressors (TS) and exert TS like effect. The total effect such gene expression exerts is responsible for the rare occurrence and benign nature of primary cardiac tumors. This prevents the progression of tumorigenesis. But this also limits the regenerative and proliferative potential of cardiomyocytes. Cardiac Myxoma develops as a consequence of dysregulations in these key genes which revert the cells towards progenitor-like state, hallmark of CM. The CM development in carney complex also signifies the role of TS in cardiac cells.
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Affiliation(s)
- Ovais Shafi
- Sindh Medical College - Jinnah Sindh Medical University / Dow University of Health Sciences, Karachi, Pakistan.
| | - Ghazia Siddiqui
- Sindh Medical College - Jinnah Sindh Medical University / Dow University of Health Sciences, Karachi, Pakistan
| | - Hassam A Jaffry
- Sindh Medical College - Jinnah Sindh Medical University / Dow University of Health Sciences, Karachi, Pakistan
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5
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Alhaj Hussen K, Chabaane E, Nelson E, Lekiashvili S, Diop S, Keita S, Evrard B, Lardenois A, Delord M, Verhoeyen E, Cornils K, Kasraian Z, Macintyre EA, Cumano A, Garrick D, Goodhardt M, Andrieu GP, Asnafi V, Chalmel F, Canque B. Multimodal cartography of human lymphopoiesis reveals B and T/NK/ILC lineages are subjected to differential regulation. iScience 2023; 26:107890. [PMID: 37766969 PMCID: PMC10520540 DOI: 10.1016/j.isci.2023.107890] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Revised: 08/24/2023] [Accepted: 09/07/2023] [Indexed: 09/29/2023] Open
Abstract
The developmental cartography of human lymphopoiesis remains incompletely understood. Here, we establish a multimodal map demonstrating that lymphoid specification follows independent direct or stepwise hierarchic routes converging toward the emergence of newly characterized CD117lo multi-lymphoid progenitors (MLPs) that undergo a proliferation arrest before entering the CD127- (NK/ILC/T) or CD127+ (B) lymphoid pathways. While the differentiation of CD127- early lymphoid progenitors is mainly driven by Flt3 signaling, emergence of their CD127+ counterparts is regulated cell-intrinsically and depends exclusively on the divisional history of their upstream precursors, including hematopoietic stem cells. Further, transcriptional mapping of differentiation trajectories reveals that whereas myeloid granulomonocytic lineages follow continuous differentiation pathways, lymphoid trajectories are intrinsically discontinuous and characterized by sequential waves of cell proliferation allowing pre-commitment amplification of lymphoid progenitor pools. Besides identifying new lymphoid specification pathways and regulatory checkpoints, our results demonstrate that NK/ILC/T and B lineages are under fundamentally distinct modes of regulation. (149 words).
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Affiliation(s)
- Kutaiba Alhaj Hussen
- INSERM U976, Université de Paris, École Pratique des Hautes Études/PSL Research University, Institut de Recherche Saint Louis, Paris, France
- Service de Biochimie, Université de Paris Saclay, Hôpital Paul Brousse, AP-HP, Villejuif, Paris, France
| | - Emna Chabaane
- INSERM U976, Université de Paris, École Pratique des Hautes Études/PSL Research University, Institut de Recherche Saint Louis, Paris, France
| | - Elisabeth Nelson
- INSERM U976, Université de Paris, École Pratique des Hautes Études/PSL Research University, Institut de Recherche Saint Louis, Paris, France
| | - Shalva Lekiashvili
- INSERM U976, Université de Paris, École Pratique des Hautes Études/PSL Research University, Institut de Recherche Saint Louis, Paris, France
| | - Samuel Diop
- INSERM U976, Université de Paris, École Pratique des Hautes Études/PSL Research University, Institut de Recherche Saint Louis, Paris, France
| | - Seydou Keita
- INSERM U976, Université de Paris, École Pratique des Hautes Études/PSL Research University, Institut de Recherche Saint Louis, Paris, France
| | - Bertrand Evrard
- University Rennes, Inserm, EHESP, Irset (Institut de recherche en santé, environnement et travail) - UMR_S 1085, F-35000 Rennes, France
| | - Aurélie Lardenois
- University Rennes, Inserm, EHESP, Irset (Institut de recherche en santé, environnement et travail) - UMR_S 1085, F-35000 Rennes, France
| | - Marc Delord
- INSERM U976, Université de Paris, École Pratique des Hautes Études/PSL Research University, Institut de Recherche Saint Louis, Paris, France
| | - Els Verhoeyen
- CIRI, International Center for Infectiology Research, Université de Lyon, INSERM U1111, Lyon, France
- Centre Mediterranéen de Médecine Moléculaire (C3M), INSERM U1065, Nice, France
| | - Kerstin Cornils
- Division of Pediatric Stem Cell Transplantation and Immunology, Department of Pediatric Hematology and Oncology, University Medical Center Hamburg-Eppendorf and Research Institute Children’s Cancer Center, Hamburg, Germany
| | - Zeinab Kasraian
- INSERM U976, Université de Paris, École Pratique des Hautes Études/PSL Research University, Institut de Recherche Saint Louis, Paris, France
- Institut Necker Enfants-Malades, INSERM U1151, Hôpital Necker Enfants-Malades, Laboratoire d'Onco-Hématologie, Assistance Publique-Hôpitaux de Paris (AP-HP), Université de Paris, Paris, France
| | - Elizabeth A. Macintyre
- Institut Necker Enfants-Malades, INSERM U1151, Hôpital Necker Enfants-Malades, Laboratoire d'Onco-Hématologie, Assistance Publique-Hôpitaux de Paris (AP-HP), Université de Paris, Paris, France
| | - Ana Cumano
- Unit of Lymphopoiesis, Immunology Department, Institut Pasteur, Paris, France
| | - David Garrick
- INSERM U976, Université de Paris, École Pratique des Hautes Études/PSL Research University, Institut de Recherche Saint Louis, Paris, France
| | - Michele Goodhardt
- INSERM U976, Université de Paris, École Pratique des Hautes Études/PSL Research University, Institut de Recherche Saint Louis, Paris, France
| | - Guillaume P. Andrieu
- Institut Necker Enfants-Malades, INSERM U1151, Hôpital Necker Enfants-Malades, Laboratoire d'Onco-Hématologie, Assistance Publique-Hôpitaux de Paris (AP-HP), Université de Paris, Paris, France
| | - Vahid Asnafi
- Institut Necker Enfants-Malades, INSERM U1151, Hôpital Necker Enfants-Malades, Laboratoire d'Onco-Hématologie, Assistance Publique-Hôpitaux de Paris (AP-HP), Université de Paris, Paris, France
| | - Frederic Chalmel
- University Rennes, Inserm, EHESP, Irset (Institut de recherche en santé, environnement et travail) - UMR_S 1085, F-35000 Rennes, France
| | - Bruno Canque
- INSERM U976, Université de Paris, École Pratique des Hautes Études/PSL Research University, Institut de Recherche Saint Louis, Paris, France
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6
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Turkalj S, Jakobsen NA, Groom A, Metzner M, Riva SG, Gür ER, Usukhbayar B, Salazar MA, Hentges LD, Mickute G, Clark K, Sopp P, Davies JOJ, Hughes JR, Vyas P. GTAC enables parallel genotyping of multiple genomic loci with chromatin accessibility profiling in single cells. Cell Stem Cell 2023; 30:722-740.e11. [PMID: 37146586 DOI: 10.1016/j.stem.2023.04.012] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2022] [Revised: 02/23/2023] [Accepted: 04/12/2023] [Indexed: 05/07/2023]
Abstract
Understanding clonal evolution and cancer development requires experimental approaches for characterizing the consequences of somatic mutations on gene regulation. However, no methods currently exist that efficiently link high-content chromatin accessibility with high-confidence genotyping in single cells. To address this, we developed Genotyping with the Assay for Transposase-Accessible Chromatin (GTAC), enabling accurate mutation detection at multiple amplified loci, coupled with robust chromatin accessibility readout. We applied GTAC to primary acute myeloid leukemia, obtaining high-quality chromatin accessibility profiles and clonal identities for multiple mutations in 88% of cells. We traced chromatin variation throughout clonal evolution, showing the restriction of different clones to distinct differentiation stages. Furthermore, we identified switches in transcription factor motif accessibility associated with a specific combination of driver mutations, which biased transformed progenitors toward a leukemia stem cell-like chromatin state. GTAC is a powerful tool to study clonal heterogeneity across a wide spectrum of pre-malignant and neoplastic conditions.
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Affiliation(s)
- Sven Turkalj
- MRC Molecular Haematology Unit, MRC Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, UK; Oxford Centre for Haematology, NIHR Oxford Biomedical Research Centre, Oxford, UK
| | - Niels Asger Jakobsen
- MRC Molecular Haematology Unit, MRC Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, UK; Oxford Centre for Haematology, NIHR Oxford Biomedical Research Centre, Oxford, UK; Department of Haematology, Oxford University Hospitals NHS Foundation Trust, Oxford, UK
| | - Angus Groom
- MRC Molecular Haematology Unit, MRC Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, UK; Oxford Centre for Haematology, NIHR Oxford Biomedical Research Centre, Oxford, UK
| | - Marlen Metzner
- MRC Molecular Haematology Unit, MRC Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, UK; Oxford Centre for Haematology, NIHR Oxford Biomedical Research Centre, Oxford, UK
| | - Simone G Riva
- MRC Molecular Haematology Unit, MRC Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, UK; MRC WIMM Centre for Computational Biology, MRC Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, UK
| | - E Ravza Gür
- MRC Molecular Haematology Unit, MRC Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, UK; MRC WIMM Centre for Computational Biology, MRC Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, UK
| | - Batchimeg Usukhbayar
- MRC Molecular Haematology Unit, MRC Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, UK; Oxford Centre for Haematology, NIHR Oxford Biomedical Research Centre, Oxford, UK
| | - Mirian Angulo Salazar
- MRC Molecular Haematology Unit, MRC Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, UK; Oxford Centre for Haematology, NIHR Oxford Biomedical Research Centre, Oxford, UK
| | - Lance D Hentges
- MRC Molecular Haematology Unit, MRC Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, UK; MRC WIMM Centre for Computational Biology, MRC Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, UK
| | - Gerda Mickute
- MRC Molecular Haematology Unit, MRC Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, UK; Oxford Centre for Haematology, NIHR Oxford Biomedical Research Centre, Oxford, UK
| | - Kevin Clark
- Flow Cytometry Facility, MRC Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, UK
| | - Paul Sopp
- Flow Cytometry Facility, MRC Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, UK
| | - James O J Davies
- MRC Molecular Haematology Unit, MRC Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, UK; Oxford Centre for Haematology, NIHR Oxford Biomedical Research Centre, Oxford, UK; Department of Haematology, Oxford University Hospitals NHS Foundation Trust, Oxford, UK
| | - Jim R Hughes
- MRC Molecular Haematology Unit, MRC Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, UK; MRC WIMM Centre for Computational Biology, MRC Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, UK
| | - Paresh Vyas
- MRC Molecular Haematology Unit, MRC Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, UK; Oxford Centre for Haematology, NIHR Oxford Biomedical Research Centre, Oxford, UK; Department of Haematology, Oxford University Hospitals NHS Foundation Trust, Oxford, UK.
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7
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Rydström A, Mansell E, Sigurdsson V, Sjöberg J, Soneji S, Miharada K, Larsson J. MAC-1 marks a quiescent and functionally superior HSC subset during regeneration. Stem Cell Reports 2023; 18:736-748. [PMID: 36868231 PMCID: PMC10031298 DOI: 10.1016/j.stemcr.2023.01.014] [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: 02/09/2022] [Revised: 01/27/2023] [Accepted: 01/30/2023] [Indexed: 03/05/2023] Open
Abstract
Mouse hematopoietic stem cells (HSCs) have been extensively defined both molecularly and functionally at steady state, while regenerative stress induces immunophenotypical changes that limit high purity isolation and analysis. It is therefore important to identify markers that specifically label activated HSCs to gain further knowledge about their molecular and functional properties. Here, we assessed the expression of macrophage-1 antigen (MAC-1) on HSCs during regeneration following transplantation and observed a transient increase in MAC-1 expression during the early reconstitution phase. Serial transplantation experiments demonstrated that reconstitution potential was highly enriched in the MAC-1+ portion of the HSC pool. Moreover, in contrast to previous reports, we found that MAC-1 expression inversely correlates with cell cycling, and global transcriptome analysis showed that regenerating MAC-1+ HSCs share molecular features with stem cells with low mitotic history. Taken together, our results suggest that MAC-1 expression marks predominantly quiescent and functionally superior HSCs during early regeneration.
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Affiliation(s)
- Anna Rydström
- Molecular Medicine and Gene Therapy, Lund Stem Cell Center, Lund University, BMC A12, 221 84 Lund, Sweden
| | - Els Mansell
- Molecular Medicine and Gene Therapy, Lund Stem Cell Center, Lund University, BMC A12, 221 84 Lund, Sweden; Stem Cell Group, Cancer Institute, University College London, London, UK
| | - Valgardur Sigurdsson
- Molecular Medicine and Gene Therapy, Lund Stem Cell Center, Lund University, BMC A12, 221 84 Lund, Sweden
| | - Julia Sjöberg
- Molecular Medicine and Gene Therapy, Lund Stem Cell Center, Lund University, BMC A12, 221 84 Lund, Sweden
| | - Shamit Soneji
- Division of Molecular Hematology, Lund Stem Cell Center, Lund University, Lund, Sweden
| | - Kenichi Miharada
- International Research Center for Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - Jonas Larsson
- Molecular Medicine and Gene Therapy, Lund Stem Cell Center, Lund University, BMC A12, 221 84 Lund, Sweden.
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8
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Pediatric T-ALL type-1 and type-2 relapses develop along distinct pathways of clonal evolution. Leukemia 2022; 36:1759-1768. [PMID: 35585141 PMCID: PMC9252914 DOI: 10.1038/s41375-022-01587-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Revised: 04/18/2022] [Accepted: 04/27/2022] [Indexed: 11/08/2022]
Abstract
The mechanisms underlying T-ALL relapse remain essentially unknown. Multilevel-omics in 38 matched pairs of initial and relapsed T-ALL revealed 18 (47%) type-1 (defined by being derived from the major ancestral clone) and 20 (53%) type-2 relapses (derived from a minor ancestral clone). In both types of relapse, we observed known and novel drivers of multidrug resistance including MDR1 and MVP, NT5C2 and JAK-STAT activators. Patients with type-1 relapses were specifically characterized by IL7R upregulation. In remarkable contrast, type-2 relapses demonstrated (1) enrichment of constitutional cancer predisposition gene mutations, (2) divergent genetic and epigenetic remodeling, and (3) enrichment of somatic hypermutator phenotypes, related to BLM, BUB1B/PMS2 and TP53 mutations. T-ALLs that later progressed to type-2 relapses exhibited a complex subclonal architecture, unexpectedly, already at the time of initial diagnosis. Deconvolution analysis of ATAC-Seq profiles showed that T-ALLs later developing into type-1 relapses resembled a predominant immature thymic T-cell population, whereas T-ALLs developing into type-2 relapses resembled a mixture of normal T-cell precursors. In sum, our analyses revealed fundamentally different mechanisms driving either type-1 or type-2 T-ALL relapse and indicate that differential capacities of disease evolution are already inherent to the molecular setup of the initial leukemia. ![]()
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9
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Jin X, Ng V, Zhao M, Liu L, Higashimoto T, Lee ZH, Chung J, Chen V, Ney G, Kandarpa M, Talpaz M, Li Q. Epigenetic downregulation of Socs2 contributes to mutant N-Ras-mediated hematopoietic dysregulation. Dis Model Mech 2022; 15:274899. [PMID: 35352806 PMCID: PMC9092650 DOI: 10.1242/dmm.049088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Accepted: 03/18/2022] [Indexed: 11/21/2022] Open
Abstract
RAS mutations occur in a broad spectrum of human hematopoietic malignancies. Activating Ras mutations in blood cells leads to hematopoietic malignancies in mice. In murine hematopoietic stem cells (HSCs), mutant N-RasG12D activates Stat5 to dysregulate stem cell function. However, the underlying mechanism remains elusive. In this study, we demonstrate that Stat5 activation induced by a hyperactive Nras mutant, G12D, is dependent on Jak2 activity. Jak2 is activated in Nras mutant HSCs and progenitors (HSPCs), and inhibiting Jak2 with ruxolitinib significantly decreases Stat5 activation and HSPC hyper-proliferation in vivo in NrasG12D mice. Activation of Jak2-Stat5 is associated with downregulation of Socs2, an inhibitory effector of Jak2/Stat5. Restoration of Socs2 blocks NrasG12D HSC reconstitution in bone marrow transplant recipients. SOCS2 downregulation is also observed in human acute myeloid leukemia (AML) cells that carry RAS mutations. RAS mutant AML cells exhibited suppression of the enhancer active marker H3K27ac at the SOCS2 locus. Finally, restoration of SOCS2 in RAS mutant AML cells mitigated leukemic growth. Thus, we discovered a novel signaling feedback loop whereby hyperactive Ras signaling activates Jak2/Stat5 via suppression of Socs2. Summary: Jak2/Stat5 is often considered to be parallel to or upstream of Ras signaling. We have discovered a novel signaling feedback loop whereby hyperactive Ras signaling activates Jak2/Stat5 via suppression of Socs2.
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Affiliation(s)
- Xi Jin
- Department of Internal Medicine, University of Michigan, Ann Arbor, MI 48109, USA
| | - Victor Ng
- Department of Internal Medicine, University of Michigan, Ann Arbor, MI 48109, USA
| | - Meiling Zhao
- Department of Internal Medicine, University of Michigan, Ann Arbor, MI 48109, USA
| | - Lu Liu
- Department of Internal Medicine, University of Michigan, Ann Arbor, MI 48109, USA
| | - Tomoyasu Higashimoto
- Department of Internal Medicine, University of Michigan, Ann Arbor, MI 48109, USA
| | - Zheng Hong Lee
- Department of Internal Medicine, University of Michigan, Ann Arbor, MI 48109, USA
| | - Jooho Chung
- Department of Internal Medicine, University of Michigan, Ann Arbor, MI 48109, USA
| | - Victor Chen
- Department of Internal Medicine, University of Michigan, Ann Arbor, MI 48109, USA
| | - Gina Ney
- Department of Pediatrics, University of Michigan, Ann Arbor, MI 48109, USA
| | - Malathi Kandarpa
- Department of Internal Medicine, University of Michigan, Ann Arbor, MI 48109, USA
| | - Moshe Talpaz
- Department of Internal Medicine, University of Michigan, Ann Arbor, MI 48109, USA
| | - Qing Li
- Department of Internal Medicine, University of Michigan, Ann Arbor, MI 48109, USA.,Department of Cell and Developmental Biology, University of Michigan, Ann Arbor, MI 48109, USA
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10
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Meng J, Zhang G, Wang WX. Functional heterogeneity of immune defenses in molluscan oysters Crassostrea hongkongensis revealed by high-throughput single-cell transcriptome. FISH & SHELLFISH IMMUNOLOGY 2022; 120:202-213. [PMID: 34843943 DOI: 10.1016/j.fsi.2021.11.027] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2021] [Revised: 11/18/2021] [Accepted: 11/18/2021] [Indexed: 06/13/2023]
Abstract
Oyster is the worldwide aquaculture molluscan and evolves a complex immune defense system, with hemocytes as the major immune system for its host defense. However, the functional heterogeneity of hemocyte has not been characterized, which markedly hinders our understanding of its defense role. Here, we used the single-cell transcriptome profiling (scRNA-seq), which provides a high-resolution visual insight into its dynamics, to map the hemocyte and assess its heterogeneity in a molluscan oyster Crassostrea hongkongensis. By combining with the cell type specific RNA-seq, thirteen subpopulations belonging to granulocyte, semi-granulocyte, and hyalinocyte were revealed. The granulocytes mainly participated in immune response and autophagy process. Pseudo-temporal ordering of granulocytes identified two different cell-lineages. The hematopoietic transcription factors regulated networks controlling their differentiations were also identified. We further identified one subpopulation of granulocytes in immune activate states with the cell cycle and immune responsive genes expressions, which illustrated the functional heterogeneity of the same cell type. Collectively, our scRNA-seq analysis demonstrated the hemocytes diversity of molluscans. The results are important in our understanding of the immune defense evolution and functional differentiation of hemocytes in Phylum Mollusca.
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Affiliation(s)
- Jie Meng
- School of Energy and Environment and Hong Kong Branch of the Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), State Key Laboratory of Marine Pollution, City University of Hong Kong, Kowloon, Hong Kong, China; Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China
| | - Guofan Zhang
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China; Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China.
| | - Wen-Xiong Wang
- School of Energy and Environment and Hong Kong Branch of the Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), State Key Laboratory of Marine Pollution, City University of Hong Kong, Kowloon, Hong Kong, China; Research Centre for the Oceans and Human Health, City University of Hong Kong Shenzhen Research Institute, Shenzhen, 518057, China.
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11
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Egeli DB, Hanfstein B, Lauseker M, Pfirrmann M, Saussele S, Baerlocher GM, Müller MC. SOCS-2 gene expression at diagnosis does not predict for outcome of chronic myeloid leukemia patients on imatinib treatment. Leuk Lymphoma 2021; 63:955-962. [PMID: 34872441 DOI: 10.1080/10428194.2021.2010059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
SOCS-2 gene expression at diagnosis has been suggested as a predictor of clinical outcome in chronic myeloid leukemia (CML). In this study SOCS-2 and GUS expression levels were determined by real-time PCR in pretherapeutic samples at diagnosis. First, three patient groups were compared after assessment at 48 months: optimal molecular responders (n = 35), patients with resistance to imatinib (n = 28), and blast crisis patients (n = 27). A significant difference in SOCS-2 gene expression at diagnosis was observed comparing blast crisis vs. resistant patients (p = 0.042) and optimal responders (p = 0.010). Second, a validation sample of consecutively randomized patients (n = 123) was investigated. No discriminative SOCS-2 gene expression cutoff could be derived to predict molecular or cytogenetic response, progression-free or overall survival. Although SOCS-2 gene was differentially expressed at the time of diagnosis in blast crisis patients when compared to other groups, a prognostic impact in consecutively randomized patients was not observed.
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Affiliation(s)
- Damla Buket Egeli
- III. Medizinische Klinik, Medizinische Fakultät Mannheim der Universität Heidelberg, Mannheim, Germany
| | - Benjamin Hanfstein
- III. Medizinische Klinik, Medizinische Fakultät Mannheim der Universität Heidelberg, Mannheim, Germany
| | - Michael Lauseker
- Institut für Medizinische Informationsverarbeitung, Biometrie und Epidemiologie, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Markus Pfirrmann
- Institut für Medizinische Informationsverarbeitung, Biometrie und Epidemiologie, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Susanne Saussele
- III. Medizinische Klinik, Medizinische Fakultät Mannheim der Universität Heidelberg, Mannheim, Germany
| | - Gabriela M Baerlocher
- Department of BioMedical Research and Department of Hematology and Central Hematology Department, Inselspital, University Hospital, University of Bern, Bern, Switzerland
| | - Martin C Müller
- Institute for Hematology and Oncology (IHO GmbH), Mannheim, Germany
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12
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Sobah ML, Liongue C, Ward AC. SOCS Proteins in Immunity, Inflammatory Diseases, and Immune-Related Cancer. Front Med (Lausanne) 2021; 8:727987. [PMID: 34604264 PMCID: PMC8481645 DOI: 10.3389/fmed.2021.727987] [Citation(s) in RCA: 63] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2021] [Accepted: 08/16/2021] [Indexed: 01/10/2023] Open
Abstract
Cytokine signaling represents one of the cornerstones of the immune system, mediating the complex responses required to facilitate appropriate immune cell development and function that supports robust immunity. It is crucial that these signals be tightly regulated, with dysregulation underpinning immune defects, including excessive inflammation, as well as contributing to various immune-related malignancies. A specialized family of proteins called suppressors of cytokine signaling (SOCS) participate in negative feedback regulation of cytokine signaling, ensuring it is appropriately restrained. The eight SOCS proteins identified regulate cytokine and other signaling pathways in unique ways. SOCS1–3 and CISH are most closely involved in the regulation of immune-related signaling, influencing processes such polarization of lymphocytes and the activation of myeloid cells by controlling signaling downstream of essential cytokines such as IL-4, IL-6, and IFN-γ. SOCS protein perturbation disrupts these processes resulting in the development of inflammatory and autoimmune conditions as well as malignancies. As a consequence, SOCS proteins are garnering increased interest as a unique avenue to treat these disorders.
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Affiliation(s)
| | - Clifford Liongue
- School of Medicine, Deakin University, Geelong, VIC, Australia.,Institue of Mental and Physical Health and Clinical Translation, Deakin University, Geelong, VIC, Australia
| | - Alister C Ward
- School of Medicine, Deakin University, Geelong, VIC, Australia.,Institue of Mental and Physical Health and Clinical Translation, Deakin University, Geelong, VIC, Australia
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13
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Keewan E, Matlawska-Wasowska K. The Emerging Role of Suppressors of Cytokine Signaling (SOCS) in the Development and Progression of Leukemia. Cancers (Basel) 2021; 13:4000. [PMID: 34439155 PMCID: PMC8393695 DOI: 10.3390/cancers13164000] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2021] [Revised: 08/04/2021] [Accepted: 08/06/2021] [Indexed: 12/12/2022] Open
Abstract
Cytokines are pleiotropic signaling molecules that execute an essential role in cell-to-cell communication through binding to cell surface receptors. Receptor binding activates intracellular signaling cascades in the target cell that bring about a wide range of cellular responses, including induction of cell proliferation, migration, differentiation, and apoptosis. The Janus kinase and transducers and activators of transcription (JAK/STAT) signaling pathways are activated upon cytokines and growth factors binding with their corresponding receptors. The SOCS family of proteins has emerged as a key regulator of cytokine signaling, and SOCS insufficiency leads to constitutive activation of JAK/STAT signaling and oncogenic transformation. Dysregulation of SOCS expression is linked to various solid tumors with invasive properties. However, the roles of SOCS in hematological malignancies, such as leukemia, are less clear. In this review, we discuss the recent advances pertaining to SOCS dysregulation in leukemia development and progression. We also highlight the roles of specific SOCS in immune cells within the tumor microenvironment and their possible involvement in anti-tumor immunity. Finally, we discuss the epigenetic, genetic, and post-transcriptional modifications of SOCS genes during tumorigenesis, with an emphasis on leukemia.
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Affiliation(s)
- Esra’a Keewan
- Department of Pediatrics, Division of Hematology and Oncology, University of New Mexico Health Sciences Center, Albuquerque, NM 87131, USA;
- Comprehensive Cancer Center, University of New Mexico, Albuquerque, NM 87131, USA
| | - Ksenia Matlawska-Wasowska
- Department of Pediatrics, Division of Hematology and Oncology, University of New Mexico Health Sciences Center, Albuquerque, NM 87131, USA;
- Comprehensive Cancer Center, University of New Mexico, Albuquerque, NM 87131, USA
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14
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Cancer stem cell phosphatases. Biochem J 2021; 478:2899-2920. [PMID: 34319405 DOI: 10.1042/bcj20210254] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Revised: 07/05/2021] [Accepted: 07/07/2021] [Indexed: 12/15/2022]
Abstract
Cancer stem cells (CSCs) are involved in the initiation and progression of human malignancies by enabling cancer tissue self-renewal capacity and constituting the therapy-resistant population of tumor cells. However, despite the exhausting characterization of CSC genetics, epigenetics, and kinase signaling, eradication of CSCs remains an unattainable goal in most human malignancies. While phosphatases contribute equally with kinases to cellular phosphoregulation, our understanding of phosphatases in CSCs lags severely behind our knowledge about other CSC signaling mechanisms. Many cancer-relevant phosphatases have recently become druggable, indicating that further understanding of the CSC phosphatases might provide novel therapeutic opportunities. This review summarizes the current knowledge about fundamental, but yet poorly understood involvement of phosphatases in the regulation of major CSC signaling pathways. We also review the functional roles of phosphatases in CSC self-renewal, cancer progression, and therapy resistance; focusing particularly on hematological cancers and glioblastoma. We further discuss the small molecule targeting of CSC phosphatases and their therapeutic potential in cancer combination therapies.
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15
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Zhang Y, Ma Y, Wu G, Xie M, Luo C, Huang X, Tian F, Chen J, Li X. SENP1 promotes MCL pathogenesis through regulating JAK-STAT5 pathway and SOCS2 expression. Cell Death Discov 2021; 7:192. [PMID: 34312374 PMCID: PMC8313533 DOI: 10.1038/s41420-021-00578-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2021] [Revised: 06/24/2021] [Accepted: 07/09/2021] [Indexed: 02/06/2023] Open
Abstract
Mantle cell lymphoma (MCL) is highly aggressive and its treatment remains challenging, understanding its pathogenesis is critical for future targeted therapy. SUMO specific proteases 1 (SENP1) is an important protein that regulates the balance between SUMOylation and deSUMOylation. We found that SENP1 was upregulated in MCL patient samples and cell lines. Knockdown of SENP1 could inhibit the proliferation and promote the apoptosis of MCL cells. We also found that SENP1 knockdown caused inhibition of the JAK-STAT5 pathway and upregulation of tumor suppressor cytokine signaling 2 (SOCS2). Moreover, MCL tumor growth in vivo was significantly suppressed after SENP1 knockdown in a xenograft nude mouse model. In summary, our results showed that SENP1 is involved in the pathogenesis of MCL and may be a potential therapeutic target.
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Affiliation(s)
- Yali Zhang
- Department of Hematology, Southwest Hospital, Army Medical University (Third Military Medical University), Chongqing, China
| | - Yanni Ma
- Department of Hematology, Southwest Hospital, Army Medical University (Third Military Medical University), Chongqing, China
| | - Guixian Wu
- Department of Hematology, Southwest Hospital, Army Medical University (Third Military Medical University), Chongqing, China
| | - Mingling Xie
- Department of Hematology, Southwest Hospital, Army Medical University (Third Military Medical University), Chongqing, China
| | - Chengxin Luo
- Department of Hematology, Southwest Hospital, Army Medical University (Third Military Medical University), Chongqing, China
| | - Xiangtao Huang
- Department of Hematology, Southwest Hospital, Army Medical University (Third Military Medical University), Chongqing, China
| | - Feng Tian
- Department of Hepatobiliary Surgery, Southwest Hospital, Army Medical University (Third Military Medical University), Chongqing, China
| | - Jieping Chen
- Department of Hematology, Southwest Hospital, Army Medical University (Third Military Medical University), Chongqing, China.
| | - Xi Li
- Department of Hematology, Southwest Hospital, Army Medical University (Third Military Medical University), Chongqing, China.
- Institute of Infectious Diseases, Southwest Hospital, Army Medical University (Third Military Medical University), Chongqing, China.
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16
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Grandits AM, Wieser R. Gene expression changes contribute to stemness and therapy resistance of relapsed acute myeloid leukemia: roles of SOCS2, CALCRL, MTSS1, and KDM6A. Exp Hematol 2021; 99:1-11. [PMID: 34029637 PMCID: PMC7612147 DOI: 10.1016/j.exphem.2021.05.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Revised: 05/12/2021] [Accepted: 05/14/2021] [Indexed: 12/18/2022]
Abstract
Relapse is associated with therapy resistance and is a major cause of death in acute myeloid leukemia (AML). It is thought to result from the accretion of therapy-refractory leukemic stem cells. Genetic and transcriptional changes that are recurrently gained at relapse are likely to contribute to the increased stemness and decreased therapy responsiveness at this disease stage. Despite the recent approval of several targeted drugs, chemotherapy with cytosine arabinoside and anthracyclines is still the mainstay of AML therapy. Accordingly, a number of studies have investigated genetic and gene expression changes between diagnosis and relapse of patients subjected to such treatment. Genetic alterations recurrently acquired at relapse were identified, but were restricted to small proportions of patients, and their functional characterization is still largely pending. In contrast, the expression of a substantial number of genes was altered consistently between diagnosis and recurrence of AML. Recent studies corroborated the roles of the upregulation of SOCS2 and CALCRL and of the downregulation of MTSS1 and KDM6A in therapy resistance and/or stemness of AML. These findings spur the assumption that functional investigations of genes consistently altered at recurrence of AML have the potential to promote the development of novel targeted drugs that may help to improve the outcome of this currently often fatal disease.
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Affiliation(s)
- Alexander M Grandits
- Division of Oncology, Department of Medicine I, Medical University of Vienna, Vienna, Austria; Comprehensive Cancer Center, Vienna, Austria
| | - Rotraud Wieser
- Division of Oncology, Department of Medicine I, Medical University of Vienna, Vienna, Austria; Comprehensive Cancer Center, Vienna, Austria.
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17
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Samimi H, Mehta I, Docking TR, Zainulabadeen A, Karsan A, Zare H. DNA methylation analysis improves the prognostication of acute myeloid leukemia. EJHAEM 2021; 2:211-218. [PMID: 34308417 PMCID: PMC8294109 DOI: 10.1002/jha2.187] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/20/2020] [Revised: 02/24/2021] [Accepted: 03/04/2021] [Indexed: 12/12/2022]
Abstract
Integration of orthogonal data could provide new opportunities to pinpoint the underlying molecular mechanisms of hematologic disorders. Using a novel gene network approach, we integrated DNA methylation data from The Cancer Genome Atlas (n = 194 cases) with the corresponding gene expression profile. Our integrated gene network analysis classified AML patients into low-, intermediate-, and high-risk groups. The identified high-risk group had significantly shorter overall survival compared to the low-risk group (p-value ≤10-11). Specifically, our approach identified a particular subgroup of nine high-risk AML cases that died within 2 years after diagnosis. These high-risk cases otherwise would be incorrectly classified as intermediate-risk solely based on cytogenetics, mutation profiles, and common molecular characteristics of AML. We confirmed the prognostic value of our integrative gene network approach using two independent datasets, as well as through comparison with European LeukemiaNet and LSC17 criteria. Our approach could be useful in the prognostication of a subset of borderline AML cases. These cases would not be classified into appropriate risk groups by other approaches that use gene expression, but not DNA methylation data. Our findings highlight the significance of epigenomic data, and they indicate integrating DNA methylation data with gene coexpression networks can have a synergistic effect.
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Affiliation(s)
- Hanie Samimi
- Department of Computer ScienceTexas State UniversitySan MarcosTexasUSA
| | - Isha Mehta
- Department of Cell Systems & AnatomyThe University of Texas Health Science CenterSan AntonioTexasUSA
| | - Thomas Roderick Docking
- Canada's Michael Smith Genome Sciences CentreBritish Columbia Cancer Research CentreVancouverBritish ColumbiaCanada
| | | | - Aly Karsan
- Canada's Michael Smith Genome Sciences CentreBritish Columbia Cancer Research CentreVancouverBritish ColumbiaCanada
| | - Habil Zare
- Department of Cell Systems & AnatomyThe University of Texas Health Science CenterSan AntonioTexasUSA
- Glenn Biggs Institute for Alzheimer's and Neurodegenerative DiseasesUniversity of Texas Health Sciences CenterSan AntonioTexasUSA
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18
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Zhang W, Yang B, Weng L, Li J, Bai J, Wang T, Wang J, Ye J, Jing H, Jiao Y, Chen X, Liu H, Zeng YX. Single cell sequencing reveals cell populations that predict primary resistance to imatinib in chronic myeloid leukemia. Aging (Albany NY) 2020; 12:25337-25355. [PMID: 33226961 PMCID: PMC7803567 DOI: 10.18632/aging.104136] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2020] [Accepted: 09/20/2020] [Indexed: 01/12/2023]
Abstract
The treatment of chronic myeloid leukemia (CML), a disease caused by t(9;22)(q34;q11) reciprocal translocation, has advanced largely through the use of targeted tyrosine kinase inhibitors (TKIs). To identify molecular differences that might distinguish TKI responders from non-responders, we performed single cell RNA sequencing on cells (n = 41,723 cells) obtained from the peripheral blood of four CML patients at different stages of treatment to generate single cell expression profiles. Analysis of our single cell expression profiles in conjunction with those previously obtained from the bone marrow of additional CML patients and healthy donors (total = 69,263 cells) demonstrated that imatinib treatment significantly altered leukocyte population compositions in both responders and non-responders, and affected the expression profiles of multiple cell populations, including non-neoplastic cell types. Notably, in imatinib poor-responders, patient-specific pre-treatment unique stem/progenitor cells became enriched in peripheral blood compared to the responders. These results indicate that resistance to TKIs might be intrinsic in some CML patients rather than acquired, and that non-neoplastic immune cell types may also play vital roles in dispersing the responsiveness of patients to TKIs. Furthermore, these results demonstrated the potential utility of peripheral blood as a diagnostic tool in the TKI sensitivity of CML patients.
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Affiliation(s)
- Weilong Zhang
- Department of Hematology, Lymphoma Research Center, Peking University Third Hospital, Beijing 100191, China.,State Key Lab of Molecular Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - Beibei Yang
- State Key Lab of Molecular Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - Linqian Weng
- Department of Hematology, Beijing Hospital, National Center of Gerontology, Beijing, China
| | - Jiangtao Li
- Department of Hematology, Beijing Hospital, National Center of Gerontology, Beijing, China
| | - Jiefei Bai
- Department of Hematology, Beijing Hospital, National Center of Gerontology, Beijing, China
| | - Ting Wang
- Department of Hematology, Beijing Hospital, National Center of Gerontology, Beijing, China
| | - Jingwen Wang
- Department of Hematology, Beijing Tongren Hospital, Capital Medical University, Beijing, China
| | - Jin Ye
- Department of Hematology, Beijing Tongren Hospital, Capital Medical University, Beijing, China
| | - Hongmei Jing
- Department of Hematology, Lymphoma Research Center, Peking University Third Hospital, Beijing 100191, China
| | - Yuchen Jiao
- State Key Lab of Molecular Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - Xixi Chen
- Genetron Health (Beijing) Co. Ltd., Beijing 102206, China.,Children’s Hospital of Chongqing Medical University, Chongqing 400014, China
| | - Hui Liu
- Department of Hematology, Beijing Hospital, National Center of Gerontology, Beijing, China
| | - Yi-Xin Zeng
- State Key Lab of Molecular Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China.,Department of Experimental Research, Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in Southern China, Collaborative Innovation Center for Cancer Medicine, Guangzhou, Guangdong Province, China
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19
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Single-cell lineage tracing unveils a role for TCF15 in haematopoiesis. Nature 2020; 583:585-589. [PMID: 32669716 PMCID: PMC7579674 DOI: 10.1038/s41586-020-2503-6] [Citation(s) in RCA: 113] [Impact Index Per Article: 28.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2019] [Accepted: 04/28/2020] [Indexed: 12/22/2022]
Abstract
Bone marrow transplantation therapy relies on the life-long regenerative capacity of haematopoietic stem cells (HSCs)1,2. HSCs present a complex variety of regenerative behaviours at the clonal level, but the mechanisms underlying this diversity are still undetermined3–11. Recent advances in single cell RNA sequencing (scRNAseq) have revealed transcriptional differences amongst HSCs, providing a possible explanation for their functional heterogeneity12–17. However, the destructive nature of sequencing assays prevents simultaneous observation of stem cell state and function. To solve this challenge, we implemented expressible lentiviral barcoding, which enabled simultaneous analysis of lineages and transcriptomes from single adult HSCs and their clonal trajectories during long-term bone marrow reconstitution. Differential gene expression analysis between clones with distinct behaviour unveiled an intrinsic molecular signature that characterizes functional long-term repopulating HSCs. Probing this signature through in vivo CRISPR screening, we found the transcription factor Tcf15 to be required, and sufficient, to drive HSC quiescence and long-term self-renewal. In situ, Tcf15 expression labels the most primitive subset of true multipotent HSCs. In conclusion, our work elucidates clone-intrinsic molecular programs associated with functional stem cell heterogeneity, and identifies a mechanism for the maintenance of the self-renewing haematopoietic stem cell state.
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20
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Jiang L, Chen T, Xiong L, Xu JH, Gong AY, Dai B, Wu G, Zhu K, Lu E, Mathy NW, Chen XM. Knockdown of m6A methyltransferase METTL3 in gastric cancer cells results in suppression of cell proliferation. Oncol Lett 2020; 20:2191-2198. [PMID: 32782536 PMCID: PMC7400027 DOI: 10.3892/ol.2020.11794] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2019] [Accepted: 05/21/2020] [Indexed: 12/14/2022] Open
Abstract
N6-methyladenosine (m6A) RNA modification regulates multiple biological functions. Methyltransferase like 3 (METTL3), one of the major N6-methyltransferases, is highly expressed in gastric cancer, but its potential role in disease is unclear. The current study knocked out METTL3 (METTL3-KO) in human gastric cancer AGS cells using CRISPR/Cas9. METTL3-KO AGS cells exhibited decreased m6A methylation levels. A significant inhibition of cell proliferation was observed in METTL3-KO AGS cells. Silencing METTL3 in AGS cells altered the expression profile of many effector molecules that were previously demonstrated to serve key roles in AGS cell proliferation, including the suppressor of cytokine signaling (SOCS) family of proteins. The results further demonstrated that SOCS2 upregulation in METTL3-KO AGS cells was associated with a decreased RNA decay rate. Furthermore, SOCS2 KO or SOCS2 overexpression caused a significant increase and decrease in AGS cell proliferation, respectively. The current data suggested that METTL3-KO in gastric cancer cells resulted in the suppression of cell proliferation by inducing SOCS2, suggesting a potential role of elevated METTL3 expression in gastric cancer progression.
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Affiliation(s)
- Li Jiang
- Department of Geriatrics, Zhongnan Hospital, Wuhan University, Wuhan, Hubei 430071, P.R. China.,Department of Medical Microbiology and Immunology, Creighton University School of Medicine, Omaha, NE 68178, USA
| | - Ting Chen
- Department of Medical Microbiology and Immunology, Creighton University School of Medicine, Omaha, NE 68178, USA.,National Demonstration Center for Experimental General Medicine Education, College of Clinical Medicine, Hubei University of Science and Technology, Xianning, Hubei 437100, P.R. China
| | - Li Xiong
- Department of Medical Microbiology and Immunology, Creighton University School of Medicine, Omaha, NE 68178, USA.,National Demonstration Center for Experimental General Medicine Education, College of Clinical Medicine, Hubei University of Science and Technology, Xianning, Hubei 437100, P.R. China
| | - Ji-Hao Xu
- Department of Medical Microbiology and Immunology, Creighton University School of Medicine, Omaha, NE 68178, USA.,Department of Gastroenterology, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, Guangdong 510120, P.R. China
| | - Ai-Yu Gong
- Department of Medical Microbiology and Immunology, Creighton University School of Medicine, Omaha, NE 68178, USA
| | - Bin Dai
- Department of Medical Microbiology and Immunology, Creighton University School of Medicine, Omaha, NE 68178, USA.,National Demonstration Center for Experimental General Medicine Education, College of Clinical Medicine, Hubei University of Science and Technology, Xianning, Hubei 437100, P.R. China
| | - Ganlin Wu
- Department of Medical Microbiology and Immunology, Creighton University School of Medicine, Omaha, NE 68178, USA.,National Demonstration Center for Experimental General Medicine Education, College of Clinical Medicine, Hubei University of Science and Technology, Xianning, Hubei 437100, P.R. China
| | - Kenny Zhu
- Department of Medical Microbiology and Immunology, Creighton University School of Medicine, Omaha, NE 68178, USA
| | - Eugene Lu
- Department of Medical Microbiology and Immunology, Creighton University School of Medicine, Omaha, NE 68178, USA
| | - Nicholas William Mathy
- Department of Medical Microbiology and Immunology, Creighton University School of Medicine, Omaha, NE 68178, USA
| | - Xian-Ming Chen
- Department of Medical Microbiology and Immunology, Creighton University School of Medicine, Omaha, NE 68178, USA
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21
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Xu J, Chen Q, Tian K, Liang R, Chen T, Gong A, Mathy NW, Yu T, Chen X. m6A methyltransferase METTL3 maintains colon cancer tumorigenicity by suppressing SOCS2 to promote cell proliferation. Oncol Rep 2020; 44:973-986. [PMID: 32705223 PMCID: PMC7388248 DOI: 10.3892/or.2020.7665] [Citation(s) in RCA: 57] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2020] [Accepted: 06/02/2020] [Indexed: 12/19/2022] Open
Abstract
N6-methyladenosine (m6A) RNA modification maintained by N6-methyltransferases and demethylases is involved in multiple biological functions. Methyltransferase like 3 (METTL3) is a major N6-methyltransferase. However, the role of METTL3 and its installed m6A modification in colorectal tumorigenesis remains to be fully elucidated. METTL3 is highly expressed as indicated in colorectal cancer samples in the TCGA and Oncomine databases, implying its potential role in colon tumorigenesis. SW480 cell line with stable METTL3 knockout (METTL3-KO) was generated using CRISPR/Cas9 and were confirmed by the loss of METTL3 expression and suppression of m6A modification. The proliferation of METTL3-KO cells was significantly inhibited compared with that of control cells. METTL3-KO decreased the decay rate of suppressor of cytokine signaling 2 (SOCS2) RNA, resulting in elevated SOCS2 protein expression. m6A-RNA immunoprecipitation-qPCR (MeRIP-qPCR) revealed that SOCS2 mRNA was targeted by METTL3 for m6A modification. Similar to METTL3-KO SW480 cells, SW480 cells treated with 3-deazaadenosine, an RNA methylation inhibitor, exhibited elevated SOCS2 protein expression. Increased levels of SOCS2 in METTL3-KO SW480 cells were associated with decreased expression of leucine-rich repeat-containing G protein-coupled receptor 5 (LGR5), contributing to the inhibition of cell proliferation. The underlying associations among METTL3, SOCS2, and LGR5 were further confirmed in SW480 cells transfected with si-METTL3 and in tumor samples from patients with colorectal cancer. Taken together, our data demonstrate that an increased level of METTL3 may maintain the tumorigenicity of colon cancer cells by suppressing SOCS2.
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Affiliation(s)
- Jihao Xu
- Department of Gastroenterology, Sun Yat‑Sen Memorial Hospital, Sun Yat‑Sen University, Guangzhou, Guangdong 510120, P.R. China
| | - Qikui Chen
- Department of Gastroenterology, Sun Yat‑Sen Memorial Hospital, Sun Yat‑Sen University, Guangzhou, Guangdong 510120, P.R. China
| | - Kuangyi Tian
- Department of Gastroenterology, Sun Yat‑Sen Memorial Hospital, Sun Yat‑Sen University, Guangzhou, Guangdong 510120, P.R. China
| | - Rongrong Liang
- Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Sun Yat‑Sen University, Guangzhou, Guangdong 510120, P.R. China
| | - Ting Chen
- Department of Medical Microbiology and Immunology, Creighton University School of Medicine, Omaha, NE 68178, USA
| | - Aiyu Gong
- Department of Medical Microbiology and Immunology, Creighton University School of Medicine, Omaha, NE 68178, USA
| | - Nicholas W Mathy
- Department of Medical Microbiology and Immunology, Creighton University School of Medicine, Omaha, NE 68178, USA
| | - Tao Yu
- Department of Gastroenterology, Sun Yat‑Sen Memorial Hospital, Sun Yat‑Sen University, Guangzhou, Guangdong 510120, P.R. China
| | - Xianming Chen
- Department of Medical Microbiology and Immunology, Creighton University School of Medicine, Omaha, NE 68178, USA
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22
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Sha C, Jia G, Jingjing Z, Yapeng H, Zhi L, Guanghui X. miR-486 is involved in the pathogenesis of acute myeloid leukemia by regulating JAK-STAT signaling. Naunyn Schmiedebergs Arch Pharmacol 2020; 394:177-187. [PMID: 32472154 DOI: 10.1007/s00210-020-01892-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2019] [Accepted: 04/28/2020] [Indexed: 12/27/2022]
Abstract
Acute myeloid leukemia (AML) is a widely prevalent disease worldwide and poses a large threat to public health. Previous studies have shown that AML is associated with cytogenetic heterogeneity, complex subtypes, and different therapeutic approaches. In this study, we found that miR-486 was upregulated in AML using both The Cancer Genome Atlas (TCGA) database and patient tissues. After knockdown of miR-486 by short hairpin RNA (shRNA), we discovered that miR-486 was required for cell proliferation. Through miRNA profile analysis and a dual-luciferase reporter assay, suppressor of cytokine signaling 2 (SOCS2) was identified as a direct target of miR-486. Therefore, by silencing SOCS2, a negative regulator of the Janus kinase (JAK)-signal transducer and activator of transcription (STAT) pathway, miR-486 enhanced JAK-STAT3 activity and promoted cell proliferation. The miR-486-SOCS2-STAT3 proliferation axis is therefore involved in the pathogenesis of AML, providing a novel molecular mechanism and diagnostic and therapeutic clues for AML.
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Affiliation(s)
- Cao Sha
- Department of Oncology, The First People's Hospital of Lianyungang, No. 6 Zhenhua Earth Road, Lianyungang City, 222061, Jiangsu Province, People's Republic of China
| | - Gao Jia
- Department of Oncology, The First People's Hospital of Lianyungang, No. 6 Zhenhua Earth Road, Lianyungang City, 222061, Jiangsu Province, People's Republic of China
| | - Zhao Jingjing
- Department of Oncology, The First People's Hospital of Lianyungang, No. 6 Zhenhua Earth Road, Lianyungang City, 222061, Jiangsu Province, People's Republic of China
| | - Hu Yapeng
- Department of Oncology, The First People's Hospital of Lianyungang, No. 6 Zhenhua Earth Road, Lianyungang City, 222061, Jiangsu Province, People's Republic of China
| | - Lou Zhi
- Department of Oncology, The First People's Hospital of Lianyungang, No. 6 Zhenhua Earth Road, Lianyungang City, 222061, Jiangsu Province, People's Republic of China
| | - Xu Guanghui
- Department of Oncology, The First People's Hospital of Lianyungang, No. 6 Zhenhua Earth Road, Lianyungang City, 222061, Jiangsu Province, People's Republic of China.
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23
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The nuclear receptor corepressor NCoR1 regulates hematopoiesis and leukemogenesis in vivo. Blood Adv 2020; 3:644-657. [PMID: 30804018 DOI: 10.1182/bloodadvances.2018022756] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2018] [Accepted: 01/18/2019] [Indexed: 12/19/2022] Open
Abstract
Enhanced understanding of normal and malignant hematopoiesis pathways should facilitate the development of effective clinical treatment strategies for hematopoietic malignancies. Nuclear receptor corepressor 1 (NCoR1) has been implicated in transcriptional repression and embryonic organ development, but its role in hematopoiesis is yet to be fully elucidated. Here, we showed that hematopoietic-specific loss of NCoR1 leads to expansion of the hematopoietic stem cell (HSC) pool due to aberrant cell cycle entry of long-term HSCs under steady-state conditions. Moreover, NCoR1-deficient HSCs exhibited normal self-renewal capacity but severely impaired lymphoid-differentiation potential in competitive hematopoietic-reconstitution assays. Transcriptome analysis further revealed that several hematopoiesis-associated genes are regulated by NCoR1. In addition, NCoR1 deficiency in hematopoietic cells delayed the course of leukemia and promoted leukemia cell differentiation in an MLL-AF9-induced mouse model. NCoR1 and its partner, histone deacetylase 3, can modulate histone acetylation and gene transcription through binding the promoter regions of myeloid-differentiation genes. Our collective results support the critical involvement of NCoR1 in normal and malignant hematopoiesis in vivo.
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24
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Lai KP, Cheung A, Ho CH, Tam NYK, Li JW, Lin X, Chan TF, Lee NPY, Li R. Transcriptomic analysis reveals the oncogenic role of S6K1 in hepatocellular carcinoma. J Cancer 2020; 11:2645-2655. [PMID: 32201535 PMCID: PMC7065997 DOI: 10.7150/jca.40726] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2019] [Accepted: 01/19/2020] [Indexed: 12/20/2022] Open
Abstract
The p70 ribosomal protein S6 kinase 1 (S6K1), a serine/threonine kinase, is commonly overexpressed in a variety of cancers. However, its expression level and functional roles in hepatocellular carcinoma (HCC), which ranks as the third leading cause of cancer-related death worldwide, is still largely unknown. In the current report, we show the in vivo and in vitro overexpression of S6K1 in HCC. In the functional analysis, we demonstrate that S6K1 is required for the proliferation and colony formation abilities in HCC. By using comparative transcriptomic analysis followed by gene ontology enrichment analysis and Ingenuity Pathway Analysis, we find that the depletion of S6K1 can elevate the expression of a cluster of apoptotic genes, tumor suppressor genes and immune responsive genes. Moreover, the knockdown of S6K1 is predicted to reduce the tumorigenicity of HCC through the regulation of hubs of genes including STAT1, HDAC4, CEBPA and ONECUT1. In conclusion, we demonstrate the oncogenic role of S6K1 in HCC, suggesting the possible use of S6K1 as a therapeutic target for HCC treatment.
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Affiliation(s)
- Keng Po Lai
- Guanxi Key Laboratory of Tumor Immunology and Microenvironmental Regulation, Guilin Medical University, Guilin, PR China.,Department of Chemistry, City University of Hong Kong, Hong Kong SAR, China
| | - Angela Cheung
- Department of Chemistry, City University of Hong Kong, Hong Kong SAR, China
| | - Cheuk Hin Ho
- Department of Chemistry, City University of Hong Kong, Hong Kong SAR, China
| | - Nathan Yi-Kan Tam
- Department of Chemistry, City University of Hong Kong, Hong Kong SAR, China
| | - Jing Woei Li
- Department of Chemistry, City University of Hong Kong, Hong Kong SAR, China
| | - Xiao Lin
- School of Life Sciences, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Ting Fung Chan
- School of Life Sciences, The Chinese University of Hong Kong, Hong Kong SAR, China.,State Key Laboratory of Agrobiotechnology, Chinese University of Hong Kong, Hong Kong SAR, China
| | - Nikki Pui-Yue Lee
- Department of Surgery, University of Hong Kong, Hong Kong SAR, China
| | - Rong Li
- Guanxi Key Laboratory of Tumor Immunology and Microenvironmental Regulation, Guilin Medical University, Guilin, PR China
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25
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microRNA-22 promotes megakaryocyte differentiation through repression of its target, GFI1. Blood Adv 2020; 3:33-46. [PMID: 30617215 DOI: 10.1182/bloodadvances.2018023804] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2018] [Accepted: 11/26/2018] [Indexed: 12/29/2022] Open
Abstract
Precise control of microRNA expression contributes to development and the establishment of tissue identity, including in proper hematopoietic commitment and differentiation, whereas aberrant expression of various microRNAs has been implicated in malignant transformation. A small number of microRNAs are upregulated in megakaryocytes, among them is microRNA-22 (miR-22). Dysregulation of miR-22 leads to various hematologic malignancies and disorders, but its role in hematopoiesis is not yet well established. Here we show that upregulation of miR-22 is a critical step in megakaryocyte differentiation. Megakaryocytic differentiation in cell lines is promoted upon overexpression of miR-22, whereas differentiation is disrupted in CRISPR/Cas9-generated miR-22 knockout cell lines, confirming that miR-22 is an essential mediator of this process. RNA-sequencing reveals that miR-22 loss results in downregulation of megakaryocyte-associated genes. Mechanistically, we identify the repressive transcription factor, GFI1, as the direct target of miR-22, and upregulation of GFI1 in the absence of miR-22 inhibits megakaryocyte differentiation. Knocking down aberrant GFI1 expression restores megakaryocytic differentiation in miR-22 knockout cells. Furthermore, we have characterized hematopoiesis in miR-22 knockout animals and confirmed that megakaryocyte differentiation is similarly impaired in vivo and upon ex vivo megakaryocyte differentiation. Consistently, repression of Gfi1 is incomplete in the megakaryocyte lineage in miR-22 knockout mice and Gfi1 is aberrantly expressed upon forced megakaryocyte differentiation in explanted bone marrow from miR-22 knockout animals. This study identifies a positive role for miR-22 in hematopoiesis, specifically in promoting megakaryocyte differentiation through repression of GFI1, a target antagonistic to this process.
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26
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Zhang H, Cheng J, Li Z, Xi Y. Identification of hub genes and molecular mechanisms in infant acute lymphoblastic leukemia with MLL gene rearrangement. PeerJ 2019; 7:e7628. [PMID: 31523525 PMCID: PMC6717502 DOI: 10.7717/peerj.7628] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2019] [Accepted: 08/06/2019] [Indexed: 12/17/2022] Open
Abstract
Infant acute lymphoblastic leukemia (ALL) with the mixed lineage leukemia (MLL) gene rearrangement (MLL-R) is considered a distinct leukemia from childhood or non-MLL-R infant ALL. To detect key genes and elucidate the molecular mechanisms of MLL-R infant ALL, microarray expression data were downloaded from the Gene Expression Omnibus (GEO) database, and differentially expressed genes (DEGs) between MLL-R and non-MLL-R infant ALL were identified. Gene ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway enrichment analyses were carried out. Then, we constructed a protein-protein interaction (PPI) network and identified the hub genes. Finally, drug-gene interactions were mined. A total of 139 cases of MLL-R infant ALL including 77 (55.4%) fusions with AF4, 38 (27.3%) with ENL, 14 (10.1%) with AF9, and 10 (7.2%) other gene fusions were characterized. A total of 236 up-regulated and 84 down-regulated DEGs were identified. The up-regulated DEGs were mainly involved in homophilic cell adhesion, negative regulation of apoptotic process and cellular response to drug GO terms, while down-regulated DEGs were mainly enriched in extracellular matrix organization, protein kinase C signaling and neuron projection extension GO terms. The up-regulated DEGs were enriched in seven KEGG pathways, mainly involving transcriptional regulation and signaling pathways, and down-regulated DEGs were involved in three main KEGG pathways including Alzheimer’s disease, TGF-beta signaling pathway, and hematopoietic cell lineage. The PPI network included 297 nodes and 410 edges, with MYC, ALB, CD44, PTPRC and TNF identified as hub genes. Twenty-three drug-gene interactions including four up-regulated hub genes and 24 drugs were constructed by Drug Gene Interaction database (DGIdb). In conclusion, MYC, ALB, CD44, PTPRC and TNF may be potential bio-markers for the diagnosis and therapy of MLL-R infant ALL.
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Affiliation(s)
- Hao Zhang
- Department of Hematology, The First Hospital of Lanzhou University, Lanzhou, Gansu, China
| | - Juan Cheng
- Department of Hematology, The First Hospital of Lanzhou University, Lanzhou, Gansu, China
| | - Zijian Li
- Department of Hematology, The First Hospital of Lanzhou University, Lanzhou, Gansu, China
| | - Yaming Xi
- Department of Hematology, The First Hospital of Lanzhou University, Lanzhou, Gansu, China
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27
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Nguyen CH, Glüxam T, Schlerka A, Bauer K, Grandits AM, Hackl H, Dovey O, Zöchbauer-Müller S, Cooper JL, Vassiliou GS, Stoiber D, Wieser R, Heller G. SOCS2 is part of a highly prognostic 4-gene signature in AML and promotes disease aggressiveness. Sci Rep 2019; 9:9139. [PMID: 31235852 PMCID: PMC6591510 DOI: 10.1038/s41598-019-45579-0] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2019] [Accepted: 06/06/2019] [Indexed: 12/14/2022] Open
Abstract
Acute myeloid leukemia (AML) is a heterogeneous disease with respect to its genetic and molecular basis and to patients´ outcome. Clinical, cytogenetic, and mutational data are used to classify patients into risk groups with different survival, however, within-group heterogeneity is still an issue. Here, we used a robust likelihood-based survival modeling approach and publicly available gene expression data to identify a minimal number of genes whose combined expression values were prognostic of overall survival. The resulting gene expression signature (4-GES) consisted of 4 genes (SOCS2, IL2RA, NPDC1, PHGDH), predicted patient survival as an independent prognostic parameter in several cohorts of AML patients (total, 1272 patients), and further refined prognostication based on the European Leukemia Net classification. An oncogenic role of the top scoring gene in this signature, SOCS2, was investigated using MLL-AF9 and Flt3-ITD/NPM1c driven mouse models of AML. SOCS2 promoted leukemogenesis as well as the abundance, quiescence, and activity of AML stem cells. Overall, the 4-GES represents a highly discriminating prognostic parameter in AML, whose clinical applicability is greatly enhanced by its small number of genes. The newly established role of SOCS2 in leukemia aggressiveness and stemness raises the possibility that the signature might even be exploitable therapeutically.
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Affiliation(s)
- Chi Huu Nguyen
- Department of Medicine I, Division of Oncology, Medical University of Vienna, Vienna, Austria
- Comprehensive Cancer Center, Vienna, Austria
| | - Tobias Glüxam
- Department of Medicine I, Division of Oncology, Medical University of Vienna, Vienna, Austria
- Comprehensive Cancer Center, Vienna, Austria
| | - Angela Schlerka
- Department of Medicine I, Division of Oncology, Medical University of Vienna, Vienna, Austria
- Comprehensive Cancer Center, Vienna, Austria
| | - Katharina Bauer
- Department of Medicine I, Division of Oncology, Medical University of Vienna, Vienna, Austria
- Comprehensive Cancer Center, Vienna, Austria
- Institute of Science and Technology Austria, Vienna, Austria
| | - Alexander M Grandits
- Department of Medicine I, Division of Oncology, Medical University of Vienna, Vienna, Austria
- Comprehensive Cancer Center, Vienna, Austria
| | - Hubert Hackl
- Division of Bioinformatics, Biocenter, Medical University of Innsbruck, Innsbruck, Austria
| | - Oliver Dovey
- Wellcome Trust Sanger Institute, Wellcome Trust Genome Campus, Hinxton, UK
| | - Sabine Zöchbauer-Müller
- Department of Medicine I, Division of Oncology, Medical University of Vienna, Vienna, Austria
- Comprehensive Cancer Center, Vienna, Austria
| | - Jonathan L Cooper
- Wellcome Trust Sanger Institute, Wellcome Trust Genome Campus, Hinxton, UK
| | - George S Vassiliou
- Wellcome Trust Sanger Institute, Wellcome Trust Genome Campus, Hinxton, UK
| | - Dagmar Stoiber
- Ludwig Boltzmann Institute for Cancer Research, Vienna, Austria
- Institute of Pharmacology, Center for Physiology and Pharmacology, Medical University of Vienna, Vienna, Austria
| | - Rotraud Wieser
- Department of Medicine I, Division of Oncology, Medical University of Vienna, Vienna, Austria.
- Comprehensive Cancer Center, Vienna, Austria.
| | - Gerwin Heller
- Department of Medicine I, Division of Oncology, Medical University of Vienna, Vienna, Austria.
- Comprehensive Cancer Center, Vienna, Austria.
- Institute of Pharmacology and Toxicology, Department for Biomedical Sciences, University of Veterinary Medicine Vienna, Vienna, Austria.
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28
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Protective Effect of JXT Ethanol Extract on Radiation-Induced Hematopoietic Alteration and Oxidative Stress in the Liver. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2018; 2018:9017835. [PMID: 30510630 PMCID: PMC6230390 DOI: 10.1155/2018/9017835] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/26/2018] [Revised: 08/01/2018] [Accepted: 09/04/2018] [Indexed: 01/22/2023]
Abstract
This study aims at investigating the radioprotective effect of ethanol extract from Ji-Xue-Teng (JXT, Spatholobus suberectus) on radiation-induced hematopoietic alteration and oxidative stress in the liver. Mice were exposed to a single acute γ-radiation for the whole body at the dose of 6.0 Gy, then subjected to administration of amifostine (45 mg/kg) or JXT (40 g crude drug/kg) once a day for 28 consecutive days, respectively. Bone marrow cells and hemogram including white cells, red cells, platelet counts, and hemoglobin level were examined. The protein expression levels of pJAK2/JAK2, pSTAT5a/STAT5a, pSTAT5b/STAT5b, and Bcl-2 in bone marrow tissue; levels of reactive oxygen species (ROS); and the activity of superoxide dismutase (SOD), malondialdehyde (MDA), and glutathione peroxidase (GSH-Px) in serum and liver tissue were determined. At the end of the experiment, the effect of JXT on cell viability and G-CSF and G-CSFR levels in NFS-60 cells were tested by CCK-8 assay, ELISA, and flow cytometry. The results showed that the mice exposed to γ-radiation alone exhibited a typical hematopoietic syndrome. In contrast, at the end of the 28-day experiment, irradiated mice subjected to oral administration of JXT showed an obvious improvement on blood profile with reduced leucopenia, thrombocytopenia (platelet counts), RBC, and hemoglobin levels, as well as bone marrow cells. The expression of pJAK2/JAK2, pSTAT5a/STAT5a, and Bcl-2 in bone marrow tissue was increased after JXT treatment. The elevation of ROS was due to radiation-induced toxicity, but JXT significantly reduced the ROS level in serum and liver tissue, elevated endogenous SOD and GSH-PX levels, and reduced the MDA level in the liver. JXT could also increase cell viability and G-CSFR level in NFS-60 cells, which was similar to exogenous G-CSF. Our findings suggested that oral administration of JXT effectively facilitated the recovery of hematopoietic bone marrow damage and oxidative stress of the mice induced by γ-radiation.
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29
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Radtke S, Adair JE, Giese MA, Chan YY, Norgaard ZK, Enstrom M, Haworth KG, Schefter LE, Kiem HP. A distinct hematopoietic stem cell population for rapid multilineage engraftment in nonhuman primates. Sci Transl Med 2018; 9:9/414/eaan1145. [PMID: 29093179 DOI: 10.1126/scitranslmed.aan1145] [Citation(s) in RCA: 79] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2017] [Revised: 04/12/2017] [Accepted: 07/26/2017] [Indexed: 12/12/2022]
Abstract
Hematopoietic reconstitution after bone marrow transplantation is thought to be driven by committed multipotent progenitor cells followed by long-term engrafting hematopoietic stem cells (HSCs). We observed a population of early-engrafting cells displaying HSC-like behavior, which persisted long-term in vivo in an autologous myeloablative transplant model in nonhuman primates. To identify this population, we characterized the phenotype and function of defined nonhuman primate hematopoietic stem and progenitor cell (HSPC) subsets and compared these to human HSPCs. We demonstrated that the CD34+CD45RA-CD90+ cell phenotype is highly enriched for HSCs. This population fully supported rapid short-term recovery and robust multilineage hematopoiesis in the nonhuman primate transplant model and quantitatively predicted transplant success and time to neutrophil and platelet recovery. Application of this cell population has potential in the setting of HSC transplantation and gene therapy/editing approaches.
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Affiliation(s)
- Stefan Radtke
- Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, WA 98109, USA.,Institute for Transfusion Medicine, University Hospital Essen, University of Duisburg-Essen, Essen 45147, Germany
| | - Jennifer E Adair
- Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, WA 98109, USA.,Department of Medicine, University of Washington School of Medicine, Seattle, WA 98195, USA
| | - Morgan A Giese
- Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, WA 98109, USA
| | - Yan-Yi Chan
- Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, WA 98109, USA
| | - Zachary K Norgaard
- Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, WA 98109, USA
| | - Mark Enstrom
- Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, WA 98109, USA
| | - Kevin G Haworth
- Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, WA 98109, USA
| | - Lauren E Schefter
- Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, WA 98109, USA
| | - Hans-Peter Kiem
- Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, WA 98109, USA. .,Department of Medicine, University of Washington School of Medicine, Seattle, WA 98195, USA.,Department of Pathology, University of Washington School of Medicine, Seattle, WA 98195, USA
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30
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Di Giorgio E, Hancock WW, Brancolini C. MEF2 and the tumorigenic process, hic sunt leones. Biochim Biophys Acta Rev Cancer 2018; 1870:261-273. [PMID: 29879430 DOI: 10.1016/j.bbcan.2018.05.007] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2018] [Revised: 05/25/2018] [Accepted: 05/26/2018] [Indexed: 12/14/2022]
Abstract
While MEF2 transcription factors are well known to cooperate in orchestrating cell fate and adaptive responses during development and adult life, additional studies over the last decade have identified a wide spectrum of genetic alterations of MEF2 in different cancers. The consequences of these alterations, including triggering and maintaining the tumorigenic process, are not entirely clear. A deeper knowledge of the molecular pathways that regulate MEF2 expression and function, as well as the nature and consequences of MEF2 mutations are necessary to fully understand the many roles of MEF2 in malignant cells. This review discusses the current knowledge of MEF2 transcription factors in cancer.
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Affiliation(s)
- Eros Di Giorgio
- Department of Medicine, Università degli Studi di Udine, P.le Kolbe 4, 33100 Udine, Italy
| | - Wayne W Hancock
- Division of Transplant Immunology, Department of Pathology and Laboratory Medicine, Biesecker Center for Pediatric Liver Diseases, Children's Hospital of Philadelphia and Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Claudio Brancolini
- Department of Medicine, Università degli Studi di Udine, P.le Kolbe 4, 33100 Udine, Italy.
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31
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Vacca D, Cancila V, Gulino A, Lo Bosco G, Belmonte B, Di Napoli A, Florena AM, Tripodo C, Arancio W. Real-time detection of BRAF V600E mutation from archival hairy cell leukemia FFPE tissue by nanopore sequencing. Mol Biol Rep 2017; 45:1-7. [DOI: 10.1007/s11033-017-4133-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2017] [Accepted: 12/08/2017] [Indexed: 12/01/2022]
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32
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Keyes BE, Fuchs E. Stem cells: Aging and transcriptional fingerprints. J Cell Biol 2017; 217:79-92. [PMID: 29070608 PMCID: PMC5748991 DOI: 10.1083/jcb.201708099] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2017] [Revised: 10/06/2017] [Accepted: 10/10/2017] [Indexed: 12/31/2022] Open
Abstract
Keyes and Fuchs discuss the decline in stem cell renewal and function with aging and the ensuing consequences on tissue homeostasis and regeneration. Stem cells are imbued with unique qualities. They have the capacity to propagate themselves through symmetric divisions and to divide asymmetrically to engender new cells that can progress to differentiate into tissue-specific, terminal cell types. Armed with these qualities, stem cells in adult tissues are tasked with replacing decaying cells and regenerating tissue after injury to maintain optimal tissue function. With increasing age, stem cell functional abilities decline, resulting in reduced organ function and delays in tissue repair. Here, we review the effect of aging in five well-studied adult murine stem cell populations and explore age-related declines in stem cell function and their consequences for stem cell self-renewal, tissue homeostasis, and regeneration. Finally, we examine transcriptional changes that have been documented in aged stem cell populations and discuss new questions and future directions that this collection of data has uncovered.
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Affiliation(s)
| | - Elaine Fuchs
- Robin Chemers Neustein Laboratory of Mammalian Cell Biology and Development, Howard Hughes Medical Institute, The Rockefeller University, New York, NY
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33
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Galeev R, Baudet A, Kumar P, Rundberg Nilsson A, Nilsson B, Soneji S, Törngren T, Borg Å, Kvist A, Larsson J. Genome-wide RNAi Screen Identifies Cohesin Genes as Modifiers of Renewal and Differentiation in Human HSCs. Cell Rep 2016; 14:2988-3000. [PMID: 26997282 DOI: 10.1016/j.celrep.2016.02.082] [Citation(s) in RCA: 60] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2015] [Revised: 02/04/2016] [Accepted: 02/22/2016] [Indexed: 12/21/2022] Open
Abstract
To gain insights into the regulatory mechanisms of hematopoietic stem cells (HSCs), we employed a genome-wide RNAi screen in human cord-blood derived cells and identified candidate genes whose knockdown maintained the HSC phenotype during culture. A striking finding was the identification of members of the cohesin complex (STAG2, RAD21, STAG1, and SMC3) among the top 20 genes from the screen. Upon individual validation of these cohesin genes, we found that their knockdown led to an immediate expansion of cells with an HSC phenotype in vitro. A similar expansion was observed in vivo following transplantation to immunodeficient mice. Transcriptome analysis of cohesin-deficient CD34(+) cells showed an upregulation of HSC-specific genes, demonstrating an immediate shift toward a more stem-cell-like gene expression signature upon cohesin deficiency. Our findings implicate cohesin as a major regulator of HSCs and illustrate the power of global RNAi screens to identify modifiers of cell fate.
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Affiliation(s)
- Roman Galeev
- Division of Molecular Medicine and Gene Therapy, Lund Stem Cell Center, Lund University, 221 84 Lund, Sweden
| | - Aurélie Baudet
- Division of Molecular Medicine and Gene Therapy, Lund Stem Cell Center, Lund University, 221 84 Lund, Sweden
| | - Praveen Kumar
- Division of Molecular Medicine and Gene Therapy, Lund Stem Cell Center, Lund University, 221 84 Lund, Sweden
| | | | - Björn Nilsson
- Division of Hematology and Transfusion Medicine, Lund University, 221 84 Lund, Sweden
| | - Shamit Soneji
- Division of Molecular Hematology, Lund Stem Cell Center, Lund University, 221 84 Lund, Sweden
| | - Therese Törngren
- Division of Oncology and Pathology, Lund University, 223 63 Lund, Sweden
| | - Åke Borg
- Division of Oncology and Pathology, Lund University, 223 63 Lund, Sweden
| | - Anders Kvist
- Division of Oncology and Pathology, Lund University, 223 63 Lund, Sweden
| | - Jonas Larsson
- Division of Molecular Medicine and Gene Therapy, Lund Stem Cell Center, Lund University, 221 84 Lund, Sweden.
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34
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Laszlo GS, Alonzo TA, Gudgeon CJ, Harrington KH, Kentsis A, Gerbing RB, Wang YC, Ries RE, Raimondi SC, Hirsch BA, Gamis AS, Meshinchi S, Walter RB. High expression of myocyte enhancer factor 2C (MEF2C) is associated with adverse-risk features and poor outcome in pediatric acute myeloid leukemia: a report from the Children's Oncology Group. J Hematol Oncol 2015; 8:115. [PMID: 26487643 PMCID: PMC4618184 DOI: 10.1186/s13045-015-0215-4] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2015] [Accepted: 10/13/2015] [Indexed: 11/10/2022] Open
Abstract
Background Recent studies have identified myocyte enhancer factor 2C (MEF2C) as cooperating oncogene in acute myeloid leukemia (AML) and suggested a contribution to the aggressive nature of at least some subtypes of AML, raising the possibility that MEF2C could serve as marker of poor-risk AML and, therefore, have prognostic significance. Methods To test this hypothesis, we retrospectively quantified MEF2C expression in pretreatment bone marrow specimens in participants of the AAML0531 trial by reverse-transcriptase polymerase chain reaction and correlated expression levels with disease characteristics and clinical outcome. Results In all 751 available patient specimens, MEF2C messenger RNA (mRNA) was detectable and varied >3000-fold relative to β-glucuronidase. Patients with the highest relative MEF2C expression (4th quartile) less likely achieved a complete remission after one course of chemotherapy than the other patients (67 vs. 78 %, P = 0.005). They also had an inferior overall survival (P = 0.014; at 5 years 55 ± 8 vs. 67 ± 4 %), inferior event-free survival (P < 0.001; at 5 years 38 ± 7 vs. 54 ± 4 %), and higher relapse risk than patients within the lower 3 quartiles of MEF2C expression (P < 0.001; at 5 years 53 ± 9 vs. 35 ± 5 %). These differences were accounted for by lower prevalence of cytogenetically/molecularly defined low-risk disease (16 vs. 46 %, P < 0.001) and higher prevalence of standard-risk disease (68 vs. 42 %, P < 0.001) in patients with high MEF2C expression, suggesting that MEF2C cooperates with additional pathogenic abnormalities. Conclusions High MEF2C expression identifies a subset of AML patients with adverse-risk disease features and poor outcome. With confirmation that high MEF2C mRNA expression leads to overexpression of MEF2C protein, these findings provide the rationale for therapeutic targeting of MEF2C transcriptional activation in AML.
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Affiliation(s)
- George S Laszlo
- Clinical Research Division, Fred Hutchinson Cancer Research Center, 1100 Fairview Ave N, D2-190, Seattle, WA, 98109-1024, USA
| | - Todd A Alonzo
- Department of Biostatistics, University of Southern California, Los Angeles, CA, USA.,Children's Oncology Group, Monrovia, CA, USA
| | - Chelsea J Gudgeon
- Clinical Research Division, Fred Hutchinson Cancer Research Center, 1100 Fairview Ave N, D2-190, Seattle, WA, 98109-1024, USA
| | - Kimberly H Harrington
- Clinical Research Division, Fred Hutchinson Cancer Research Center, 1100 Fairview Ave N, D2-190, Seattle, WA, 98109-1024, USA
| | - Alex Kentsis
- Molecular Pharmacology and Chemistry Program, Sloan Kettering Institute, New York, NY, USA.,Department of Pediatrics, Memorial Sloan Kettering Cancer Center, New York, NY, USA.,Weill Medical College of Cornell University, New York, NY, USA
| | | | | | - Rhonda E Ries
- Clinical Research Division, Fred Hutchinson Cancer Research Center, 1100 Fairview Ave N, D2-190, Seattle, WA, 98109-1024, USA
| | - Susana C Raimondi
- Children's Oncology Group, Monrovia, CA, USA.,Department of Pathology, St. Jude Children's Research Hospital, Memphis, TN, USA
| | - Betsy A Hirsch
- Children's Oncology Group, Monrovia, CA, USA.,Department of Laboratory Medicine and Pathology, University of Minnesota Cancer Center, Minneapolis, MN, USA
| | - Alan S Gamis
- Children's Oncology Group, Monrovia, CA, USA.,Division of Hematology-Oncology, Children's Mercy Hospitals and Clinics, Kansas City, MO, USA
| | - Soheil Meshinchi
- Clinical Research Division, Fred Hutchinson Cancer Research Center, 1100 Fairview Ave N, D2-190, Seattle, WA, 98109-1024, USA.,Children's Oncology Group, Monrovia, CA, USA.,Department of Pediatrics, University of Washington, Seattle, WA, USA
| | - Roland B Walter
- Clinical Research Division, Fred Hutchinson Cancer Research Center, 1100 Fairview Ave N, D2-190, Seattle, WA, 98109-1024, USA. .,Department of Medicine, Division of Hematology, University of Washington, Seattle, WA, USA. .,Department of Epidemiology, University of Washington, Seattle, WA, USA.
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