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He M, Zhou X, Wang X. Glycosylation: mechanisms, biological functions and clinical implications. Signal Transduct Target Ther 2024; 9:194. [PMID: 39098853 PMCID: PMC11298558 DOI: 10.1038/s41392-024-01886-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2023] [Revised: 05/25/2024] [Accepted: 06/07/2024] [Indexed: 08/06/2024] Open
Abstract
Protein post-translational modification (PTM) is a covalent process that occurs in proteins during or after translation through the addition or removal of one or more functional groups, and has a profound effect on protein function. Glycosylation is one of the most common PTMs, in which polysaccharides are transferred to specific amino acid residues in proteins by glycosyltransferases. A growing body of evidence suggests that glycosylation is essential for the unfolding of various functional activities in organisms, such as playing a key role in the regulation of protein function, cell adhesion and immune escape. Aberrant glycosylation is also closely associated with the development of various diseases. Abnormal glycosylation patterns are closely linked to the emergence of various health conditions, including cancer, inflammation, autoimmune disorders, and several other diseases. However, the underlying composition and structure of the glycosylated residues have not been determined. It is imperative to fully understand the internal structure and differential expression of glycosylation, and to incorporate advanced detection technologies to keep the knowledge advancing. Investigations on the clinical applications of glycosylation focused on sensitive and promising biomarkers, development of more effective small molecule targeted drugs and emerging vaccines. These studies provide a new area for novel therapeutic strategies based on glycosylation.
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Affiliation(s)
- Mengyuan He
- Department of Hematology, Shandong Provincial Hospital, Shandong University, Jinan, Shandong, 250021, China
| | - Xiangxiang Zhou
- Department of Hematology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong, 250021, China.
- National Clinical Research Center for Hematologic Diseases, the First Affiliated Hospital of Soochow University, Suzhou, 251006, China.
| | - Xin Wang
- Department of Hematology, Shandong Provincial Hospital, Shandong University, Jinan, Shandong, 250021, China.
- Department of Hematology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong, 250021, China.
- National Clinical Research Center for Hematologic Diseases, the First Affiliated Hospital of Soochow University, Suzhou, 251006, China.
- Taishan Scholars Program of Shandong Province, Jinan, Shandong, 250021, China.
- Branch of National Clinical Research Center for Hematologic Diseases, Jinan, Shandong, 250021, China.
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2
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Narayanan N, Marvin-Peek J, Abouelnaaj MK, Majid D, Wang B, Brown BD, Qiu Y, Kornblau SM, Abbas HA. Reverse Phase Proteomic Array Profiling of Asparagine Synthetase Expression in Newly Diagnosed Acute Myeloid Leukemia. J Proteome Res 2024; 23:2495-2504. [PMID: 38829961 PMCID: PMC11226376 DOI: 10.1021/acs.jproteome.4c00130] [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] [Indexed: 06/05/2024]
Abstract
Asparaginase-based therapy is a cornerstone in acute lymphoblastic leukemia (ALL) treatment, capitalizing on the methylation status of the asparagine synthetase (ASNS) gene, which renders ALL cells reliant on extracellular asparagine. Contrastingly, ASNS expression in acute myeloid leukemia (AML) has not been thoroughly investigated, despite studies suggesting that AML with chromosome 7/7q deletions might have reduced ASNS levels. Here, we leverage reverse phase protein arrays to measure ASNS expression in 810 AML patients and assess its impact on outcomes. We find that AML with inv(16) has the lowest overall ASNS expression. While AML with deletion 7/7q had ASNS levels slightly lower than those of AML without deletion 7/7q, this observation was not significant. Low ASNS expression correlated with improved overall survival (46 versus 54 weeks, respectively, p = 0.011), whereas higher ASNS levels were associated with better response to venetoclax-based therapy. Protein correlation analysis demonstrated association between ASNS and proteins involved in methylation and DNA repair. In conclusion, while ASNS expression was not lower in patients with deletion 7/7q as initially predicted, ASNS levels were highly variable across AML patients. Further studies are needed to assess whether patients with low ASNS expression are susceptible to asparaginase-based therapy due to their inability to augment compensatory ASNS expression upon asparagine depletion.
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Affiliation(s)
- Nisha Narayanan
- Department of Leukemia, University of Texas MD Anderson Cancer Center, Houston, TX, USA, 77030
- The University of Texas MD Anderson Graduate School of Biomedical Sciences, Houston, TX, USA, 77030
| | - Jennifer Marvin-Peek
- Division of Cancer Medicine, University of Texas MD Anderson Cancer Center, Houston, TX
| | - Mohamad K Abouelnaaj
- Department of Leukemia, University of Texas MD Anderson Cancer Center, Houston, TX, USA, 77030
- University of Texas Health Science Center at Houston, McGovern Medical School, Houston TX, USA, 77030
| | - Dhabya Majid
- Department of Leukemia, University of Texas MD Anderson Cancer Center, Houston, TX, USA, 77030
| | - Bofei Wang
- Department of Leukemia, University of Texas MD Anderson Cancer Center, Houston, TX, USA, 77030
| | - Brandon D. Brown
- Division of Pediatrics, University of Texas MD Anderson Cancer Center, Houston, TX, USA, 77030
| | - Yihua Qiu
- Department of Leukemia, University of Texas MD Anderson Cancer Center, Houston, TX, USA, 77030
| | - Steven M. Kornblau
- Department of Leukemia, University of Texas MD Anderson Cancer Center, Houston, TX, USA, 77030
| | - Hussein A Abbas
- Department of Leukemia, University of Texas MD Anderson Cancer Center, Houston, TX, USA, 77030
- Department of Genomic Medicine, University of Texas MD Anderson Cancer Center, Houston, TX, USA, 77030
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3
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Manoochehrabadi S, Talebi M, Pashaiefar H, Ghafouri-Fard S, Vaezi M, Omrani MD, Ahmadvand M. Upregulation of lnc-FOXD2-AS1, CDC45, and CDK1 in patients with primary non-M3 AML is associated with a worse prognosis. Blood Res 2024; 59:4. [PMID: 38485838 PMCID: PMC10903518 DOI: 10.1007/s44313-024-00002-0] [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: 09/12/2023] [Accepted: 01/03/2024] [Indexed: 03/18/2024] Open
Abstract
Acute myeloid leukemia (AML) is a heterogeneous hematologic malignancy with an unfavorable outcome. The present research aimed to identify novel biological targets for AML diagnosis and treatment. In this study, we performed an in-silico method to identify antisense RNAs (AS-RNAs) and their related co-expression genes. GSE68172 was selected from the AML database of the Gene Expression Omnibus and compared using the GEO2R tool to find DEGs. Antisense RNAs were selected from all the genes that had significant expression and a survival plot was drawn for them in the GEPIA database, FOXD2-AS1 was chosen for further investigation based on predetermined criteria (logFC ≥|1| and P < 0.05) and its noteworthy association between elevated expression level and a marked reduction in the overall survival (OS) in patients diagnosed with AML. The GEPIA database was utilized to investigate FOXD2-AS1-related co-expression and similar genes. The Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway enrichment analysis and gene ontology (GO) function analysis of the mentioned gene lists were performed using the DAVID database. The protein-protein interaction (PPI) network was then constructed using the STRING database. Hub genes were screened using Cytoscape software. Pearson correlation analysis was conducted using the GEPIA database to explore the relationship between FOXD2-AS1 and the hub genes. The transcription of the selected coding and non-coding genes, including FOXD2-AS1, CDC45, CDC20, CDK1, and CCNB1, was validated in 150 samples, including 100 primary AML non-M3 blood samples and 50 granulocyte colony stimulating factor (G-CSF)-mobilized healthy donors, using quantitative Real-Time PCR (qRT-PCR). qRT-PCR results displayed significant upregulation of lnc-FOXD2-AS1, CDC45, and CDK1 in primary AML non-M3 blood samples compared to healthy blood samples (P = 0.0032, P = 0.0078, and P = 0.0117, respectively). The expression levels of CDC20 and CCNB1 were not statistically different between the two sets of samples (P = 0.8315 and P = 0.2788, respectively). We identified that AML patients with upregulation of FOXD2-AS1, CDK1, and CDC45 had shorter overall survival (OS) and Relapse-free survival (RFS) compared those with low expression of FOXD2-AS1, CDK1, and CDC45. Furthermore, the receiver operating characteristic (ROC) curve showed the potential biomarkers of lnc -FOXD2-AS1, CDC45, and CDK1 in primary AML non-M3 blood samples. This research proposed that the dysregulation of lnc-FOXD2-AS1, CDC45, and CDK1 can contribute to both disease state and diagnosis as well as treatment. The present study proposes the future evolution of the functional role of lnc-FOXD2-AS1, CDC45, and CDK1 in AML development.
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Affiliation(s)
- Saba Manoochehrabadi
- Department of Medical Genetics, Faculty of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Morteza Talebi
- Department of Medical Genetics and Molecular Biology, Faculty of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Hossein Pashaiefar
- Cell Therapy and Hematopoietic Stem Cell Transplantation Research Center, Hematology and Cell Therapy, Research Institute for Oncology, Tehran University of Medical Sciences, Tehran, Iran
| | - Soudeh Ghafouri-Fard
- Department of Medical Genetics, Faculty of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mohammad Vaezi
- Cell Therapy and Hematopoietic Stem Cell Transplantation Research Center, Hematology and Cell Therapy, Research Institute for Oncology, Tehran University of Medical Sciences, Tehran, Iran
| | - Mir Davood Omrani
- Department of Medical Genetics, Faculty of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
| | - Mohammad Ahmadvand
- Cell Therapy and Hematopoietic Stem Cell Transplantation Research Center, Hematology and Cell Therapy, Research Institute for Oncology, Tehran University of Medical Sciences, Tehran, Iran.
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Sabatier M, Birsen R, Lauture L, Mouche S, Angelino P, Dehairs J, Goupille L, Boussaid I, Heiblig M, Boet E, Sahal A, Saland E, Santos JC, Armengol M, Fernández-Serrano M, Farge T, Cognet G, Simonetta F, Pignon C, Graffeuil A, Mazzotti C, Avet-Loiseau H, Delos O, Bertrand-Michel J, Chedru A, Dembitz V, Gallipoli P, Anstee NS, Loo S, Wei AH, Carroll M, Goubard A, Castellano R, Collette Y, Vergez F, Mansat-De Mas V, Bertoli S, Tavitian S, Picard M, Récher C, Bourges-Abella N, Granat F, Kosmider O, Sujobert P, Colsch B, Joffre C, Stuani L, Swinnen JV, Guillou H, Roué G, Hakim N, Dejean AS, Tsantoulis P, Larrue C, Bouscary D, Tamburini J, Sarry JE. C/EBPα Confers Dependence to Fatty Acid Anabolic Pathways and Vulnerability to Lipid Oxidative Stress-Induced Ferroptosis in FLT3-Mutant Leukemia. Cancer Discov 2023; 13:1720-1747. [PMID: 37012202 DOI: 10.1158/2159-8290.cd-22-0411] [Citation(s) in RCA: 23] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2022] [Revised: 01/19/2023] [Accepted: 03/30/2023] [Indexed: 04/05/2023]
Abstract
Although transcription factor CCAAT-enhancer binding protein α (C/EBPα) is critical for normal and leukemic differentiation, its role in cell and metabolic homeostasis is largely unknown in cancer. Here, multiomics analyses uncovered a coordinated activation of C/EBPα and Fms-like tyrosine kinase 3 (FLT3) that increased lipid anabolism in vivo and in patients with FLT3-mutant acute myeloid leukemia (AML). Mechanistically, C/EBPα regulated the fatty acid synthase (FASN)-stearoyl-CoA desaturase (SCD) axis to promote fatty acid (FA) biosynthesis and desaturation. We further demonstrated that FLT3 or C/EBPα inactivation decreased monounsaturated FA incorporation to membrane phospholipids through SCD downregulation. Consequently, SCD inhibition enhanced susceptibility to lipid redox stress that was exploited by combining FLT3 and glutathione peroxidase 4 inhibition to trigger lipid oxidative stress, enhancing ferroptotic death of FLT3-mutant AML cells. Altogether, our study reveals a C/EBPα function in lipid homeostasis and adaptation to redox stress, and a previously unreported vulnerability of FLT3-mutant AML to ferroptosis with promising therapeutic application. SIGNIFICANCE FLT3 mutations are found in 30% of AML cases and are actionable by tyrosine kinase inhibitors. Here, we discovered that C/EBPα regulates FA biosynthesis and protection from lipid redox stress downstream mutant-FLT3 signaling, which confers a vulnerability to ferroptosis upon FLT3 inhibition with therapeutic potential in AML. This article is highlighted in the In This Issue feature, p. 1501.
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Affiliation(s)
- Marie Sabatier
- Centre de Recherches en Cancérologie de Toulouse, Université de Toulouse, Inserm U1037, CNRS U5077, Toulouse, France
- LabEx Toucan, Toulouse, France
- Équipe Labellisée Ligue Nationale Contre le Cancer 2018, Toulouse, France
| | - Rudy Birsen
- Translational Research Centre in Onco-Hematology, Faculty of Medicine, University of Geneva, and Swiss Cancer Center Leman, Geneva, Switzerland
- Université de Paris, Institut Cochin, CNRS U8104, Inserm U1016, Paris, France
- Equipe Labellisée Ligue Nationale Contre le Cancer, Paris, France
- Assistance Publique-Hôpitaux de Paris, Hôpitaux Universitaires Paris Centre, Service d'Hématologie Clinique, Paris, France
| | - Laura Lauture
- Centre de Recherches en Cancérologie de Toulouse, Université de Toulouse, Inserm U1037, CNRS U5077, Toulouse, France
- LabEx Toucan, Toulouse, France
- Équipe Labellisée Ligue Nationale Contre le Cancer 2018, Toulouse, France
| | - Sarah Mouche
- Translational Research Centre in Onco-Hematology, Faculty of Medicine, University of Geneva, and Swiss Cancer Center Leman, Geneva, Switzerland
| | - Paolo Angelino
- Swiss Institute of Bioinformatics, Lausanne, Switzerland
| | - Jonas Dehairs
- Laboratory of Lipid Metabolism and Cancer, Department of Oncology, LKI-Leuven Cancer Institute, KU Leuven, Leuven, Belgium
| | - Léa Goupille
- Centre de Recherches en Cancérologie de Toulouse, Université de Toulouse, Inserm U1037, CNRS U5077, Toulouse, France
- LabEx Toucan, Toulouse, France
- Équipe Labellisée Ligue Nationale Contre le Cancer 2018, Toulouse, France
| | - Ismael Boussaid
- Université de Paris, Institut Cochin, CNRS U8104, Inserm U1016, Paris, France
- Equipe Labellisée Ligue Nationale Contre le Cancer, Paris, France
| | - Maël Heiblig
- Hospices Civils de Lyon, Hôpital Lyon Sud, Lyon, France
- CIRI, Inserm U1111 CNRS 5308, Université Lyon 1, Lyon, France
| | - Emeline Boet
- Centre de Recherches en Cancérologie de Toulouse, Université de Toulouse, Inserm U1037, CNRS U5077, Toulouse, France
- LabEx Toucan, Toulouse, France
- Équipe Labellisée Ligue Nationale Contre le Cancer 2018, Toulouse, France
| | - Ambrine Sahal
- Centre de Recherches en Cancérologie de Toulouse, Université de Toulouse, Inserm U1037, CNRS U5077, Toulouse, France
- LabEx Toucan, Toulouse, France
- Équipe Labellisée Ligue Nationale Contre le Cancer 2018, Toulouse, France
| | - Estelle Saland
- Centre de Recherches en Cancérologie de Toulouse, Université de Toulouse, Inserm U1037, CNRS U5077, Toulouse, France
- LabEx Toucan, Toulouse, France
- Équipe Labellisée Ligue Nationale Contre le Cancer 2018, Toulouse, France
| | - Juliana C Santos
- Lymphoma Translational Group, Josep Carreras Leukaemia Research Institute, Badalona, Spain
| | - Marc Armengol
- Lymphoma Translational Group, Josep Carreras Leukaemia Research Institute, Badalona, Spain
| | | | - Thomas Farge
- Centre de Recherches en Cancérologie de Toulouse, Université de Toulouse, Inserm U1037, CNRS U5077, Toulouse, France
- LabEx Toucan, Toulouse, France
- Équipe Labellisée Ligue Nationale Contre le Cancer 2018, Toulouse, France
| | - Guillaume Cognet
- Centre de Recherches en Cancérologie de Toulouse, Université de Toulouse, Inserm U1037, CNRS U5077, Toulouse, France
- LabEx Toucan, Toulouse, France
- Équipe Labellisée Ligue Nationale Contre le Cancer 2018, Toulouse, France
| | - Federico Simonetta
- Translational Research Centre in Onco-Hematology, Faculty of Medicine, University of Geneva, and Swiss Cancer Center Leman, Geneva, Switzerland
| | - Corentin Pignon
- Centre de Recherches en Cancérologie de Toulouse, Université de Toulouse, Inserm U1037, CNRS U5077, Toulouse, France
- Centre Hospitalier Universitaire de Toulouse, Institut Universitaire du Cancer de Toulouse Oncopole, Service d'Hématologie, Toulouse, France
| | - Antoine Graffeuil
- Centre de Recherches en Cancérologie de Toulouse, Université de Toulouse, Inserm U1037, CNRS U5077, Toulouse, France
- Centre Hospitalier Universitaire de Toulouse, Institut Universitaire du Cancer de Toulouse Oncopole, Service d'Hématologie, Toulouse, France
| | - Céline Mazzotti
- Centre de Recherches en Cancérologie de Toulouse, Université de Toulouse, Inserm U1037, CNRS U5077, Toulouse, France
- Centre Hospitalier Universitaire de Toulouse, Institut Universitaire du Cancer de Toulouse Oncopole, Service d'Hématologie, Toulouse, France
| | - Hervé Avet-Loiseau
- Centre de Recherches en Cancérologie de Toulouse, Université de Toulouse, Inserm U1037, CNRS U5077, Toulouse, France
- Centre Hospitalier Universitaire de Toulouse, Institut Universitaire du Cancer de Toulouse Oncopole, Service d'Hématologie, Toulouse, France
| | - Océane Delos
- MetaboHUB-MetaToul, National Infrastructure of Metabolomics and Fluxomics, University Paul Sabatier, Toulouse, France
| | - Justine Bertrand-Michel
- MetaboHUB-MetaToul, National Infrastructure of Metabolomics and Fluxomics, University Paul Sabatier, Toulouse, France
| | - Amélie Chedru
- Université Paris-Saclay, CEA, INRAE, Département Médicaments et Technologies pour la Santé, MetaboHUB, Gif sur Yvette, France
| | - Vilma Dembitz
- Centre for Haemato-Oncology, Barts Cancer Institute, Queen Mary University of London, London, United Kingdom
| | - Paolo Gallipoli
- Centre for Haemato-Oncology, Barts Cancer Institute, Queen Mary University of London, London, United Kingdom
| | - Natasha S Anstee
- Walter and Eliza Hall Institute of Medical Research, Parkville, Australia
- Department of Medical Biology, University of Melbourne, Parkville, Australia
| | - Sun Loo
- Walter and Eliza Hall Institute of Medical Research, Parkville, Australia
- Department of Medical Biology, University of Melbourne, Parkville, Australia
- Clinical Haematology, Peter MacCallum Cancer Centre and Royal Melbourne Hospital, Melbourne, Australia
| | - Andrew H Wei
- Walter and Eliza Hall Institute of Medical Research, Parkville, Australia
- Department of Medical Biology, University of Melbourne, Parkville, Australia
- Clinical Haematology, Peter MacCallum Cancer Centre and Royal Melbourne Hospital, Melbourne, Australia
| | - Martin Carroll
- Department of Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Armelle Goubard
- Aix-Marseille University, Inserm, CNRS, Institut Paoli-Calmettes, CRCM, Marseille, France
| | - Rémy Castellano
- Aix-Marseille University, Inserm, CNRS, Institut Paoli-Calmettes, CRCM, Marseille, France
| | - Yves Collette
- Aix-Marseille University, Inserm, CNRS, Institut Paoli-Calmettes, CRCM, Marseille, France
| | - François Vergez
- Centre de Recherches en Cancérologie de Toulouse, Université de Toulouse, Inserm U1037, CNRS U5077, Toulouse, France
- LabEx Toucan, Toulouse, France
- Équipe Labellisée Ligue Nationale Contre le Cancer 2018, Toulouse, France
- Centre Hospitalier Universitaire de Toulouse, Institut Universitaire du Cancer de Toulouse Oncopole, Service d'Hématologie, Toulouse, France
| | - Véronique Mansat-De Mas
- Centre de Recherches en Cancérologie de Toulouse, Université de Toulouse, Inserm U1037, CNRS U5077, Toulouse, France
- LabEx Toucan, Toulouse, France
- Équipe Labellisée Ligue Nationale Contre le Cancer 2018, Toulouse, France
- Centre Hospitalier Universitaire de Toulouse, Institut Universitaire du Cancer de Toulouse Oncopole, Service d'Hématologie, Toulouse, France
| | - Sarah Bertoli
- Centre de Recherches en Cancérologie de Toulouse, Université de Toulouse, Inserm U1037, CNRS U5077, Toulouse, France
- LabEx Toucan, Toulouse, France
- Équipe Labellisée Ligue Nationale Contre le Cancer 2018, Toulouse, France
- Centre Hospitalier Universitaire de Toulouse, Institut Universitaire du Cancer de Toulouse Oncopole, Service d'Hématologie, Toulouse, France
| | - Suzanne Tavitian
- Centre Hospitalier Universitaire de Toulouse, Institut Universitaire du Cancer de Toulouse Oncopole, Service d'Hématologie, Toulouse, France
| | - Muriel Picard
- Centre Hospitalier Universitaire de Toulouse, Institut Universitaire du Cancer de Toulouse Oncopole, Service de Réanimation, Toulouse, France
| | - Christian Récher
- Centre de Recherches en Cancérologie de Toulouse, Université de Toulouse, Inserm U1037, CNRS U5077, Toulouse, France
- LabEx Toucan, Toulouse, France
- Équipe Labellisée Ligue Nationale Contre le Cancer 2018, Toulouse, France
- Centre Hospitalier Universitaire de Toulouse, Institut Universitaire du Cancer de Toulouse Oncopole, Service d'Hématologie, Toulouse, France
| | | | - Fanny Granat
- Centre de Recherches en Cancérologie de Toulouse, Université de Toulouse, Inserm U1037, CNRS U5077, Toulouse, France
- LabEx Toucan, Toulouse, France
- Équipe Labellisée Ligue Nationale Contre le Cancer 2018, Toulouse, France
| | - Olivier Kosmider
- Université de Paris, Institut Cochin, CNRS U8104, Inserm U1016, Paris, France
- Equipe Labellisée Ligue Nationale Contre le Cancer, Paris, France
| | - Pierre Sujobert
- Hospices Civils de Lyon, Hôpital Lyon Sud, Lyon, France
- CIRI, Inserm U1111 CNRS 5308, Université Lyon 1, Lyon, France
| | - Benoit Colsch
- Université Paris-Saclay, CEA, INRAE, Département Médicaments et Technologies pour la Santé, MetaboHUB, Gif sur Yvette, France
| | - Carine Joffre
- Centre de Recherches en Cancérologie de Toulouse, Université de Toulouse, Inserm U1037, CNRS U5077, Toulouse, France
- LabEx Toucan, Toulouse, France
- Équipe Labellisée Ligue Nationale Contre le Cancer 2018, Toulouse, France
| | - Lucille Stuani
- Centre de Recherches en Cancérologie de Toulouse, Université de Toulouse, Inserm U1037, CNRS U5077, Toulouse, France
- LabEx Toucan, Toulouse, France
- Équipe Labellisée Ligue Nationale Contre le Cancer 2018, Toulouse, France
| | - Johannes V Swinnen
- Laboratory of Lipid Metabolism and Cancer, Department of Oncology, LKI-Leuven Cancer Institute, KU Leuven, Leuven, Belgium
| | - Hervé Guillou
- Toxalim (Research Centre in Food Toxicology), Université de Toulouse, INRAE, ENVT, INP-Purpan, University Paul Sabatier, Toulouse, France
| | - Gael Roué
- Lymphoma Translational Group, Josep Carreras Leukaemia Research Institute, Badalona, Spain
| | - Nawad Hakim
- Institut Toulousain des Maladies Infectieuses et Inflammatoires (INFINITy), Inserm UMR1291, CNRS UMR5051, Université Toulouse III, Toulouse, France
| | - Anne S Dejean
- Institut Toulousain des Maladies Infectieuses et Inflammatoires (INFINITy), Inserm UMR1291, CNRS UMR5051, Université Toulouse III, Toulouse, France
| | - Petros Tsantoulis
- Translational Research Centre in Onco-Hematology, Faculty of Medicine, University of Geneva, and Swiss Cancer Center Leman, Geneva, Switzerland
- Swiss Institute of Bioinformatics, Lausanne, Switzerland
| | - Clément Larrue
- Translational Research Centre in Onco-Hematology, Faculty of Medicine, University of Geneva, and Swiss Cancer Center Leman, Geneva, Switzerland
| | - Didier Bouscary
- Université de Paris, Institut Cochin, CNRS U8104, Inserm U1016, Paris, France
- Equipe Labellisée Ligue Nationale Contre le Cancer, Paris, France
- Assistance Publique-Hôpitaux de Paris, Hôpitaux Universitaires Paris Centre, Service d'Hématologie Clinique, Paris, France
| | - Jerome Tamburini
- Translational Research Centre in Onco-Hematology, Faculty of Medicine, University of Geneva, and Swiss Cancer Center Leman, Geneva, Switzerland
- Université de Paris, Institut Cochin, CNRS U8104, Inserm U1016, Paris, France
- Equipe Labellisée Ligue Nationale Contre le Cancer, Paris, France
| | - Jean-Emmanuel Sarry
- Centre de Recherches en Cancérologie de Toulouse, Université de Toulouse, Inserm U1037, CNRS U5077, Toulouse, France
- LabEx Toucan, Toulouse, France
- Équipe Labellisée Ligue Nationale Contre le Cancer 2018, Toulouse, France
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5
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Wang Q, Bode AM, Zhang T. Targeting CDK1 in cancer: mechanisms and implications. NPJ Precis Oncol 2023; 7:58. [PMID: 37311884 DOI: 10.1038/s41698-023-00407-7] [Citation(s) in RCA: 18] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2023] [Accepted: 05/25/2023] [Indexed: 06/15/2023] Open
Abstract
Cyclin dependent kinases (CDKs) are serine/threonine kinases that are proposed as promising candidate targets for cancer treatment. These proteins complexed with cyclins play a critical role in cell cycle progression. Most CDKs demonstrate substantially higher expression in cancer tissues compared with normal tissues and, according to the TCGA database, correlate with survival rate in multiple cancer types. Deregulation of CDK1 has been shown to be closely associated with tumorigenesis. CDK1 activation plays a critical role in a wide range of cancer types; and CDK1 phosphorylation of its many substrates greatly influences their function in tumorigenesis. Enrichment of CDK1 interacting proteins with Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway analysis was conducted to demonstrate that the associated proteins participate in multiple oncogenic pathways. This abundance of evidence clearly supports CDK1 as a promising target for cancer therapy. A number of small molecules targeting CDK1 or multiple CDKs have been developed and evaluated in preclinical studies. Notably, some of these small molecules have also been subjected to human clinical trials. This review evaluates the mechanisms and implications of targeting CDK1 in tumorigenesis and cancer therapy.
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Affiliation(s)
- Qiushi Wang
- The Hormel Institute, University of Minnesota, 801 16th Ave NE, Austin, MN, 55912, USA
| | - Ann M Bode
- The Hormel Institute, University of Minnesota, 801 16th Ave NE, Austin, MN, 55912, USA.
| | - Tianshun Zhang
- The Hormel Institute, University of Minnesota, 801 16th Ave NE, Austin, MN, 55912, USA.
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6
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Tomic B, Smoljo T, Lalic H, Dembitz V, Batinic J, Batinic D, Bedalov A, Visnjic D. Cytarabine-induced differentiation of AML cells depends on Chk1 activation and shares the mechanism with inhibitors of DHODH and pyrimidine synthesis. Sci Rep 2022; 12:11344. [PMID: 35790845 PMCID: PMC9256737 DOI: 10.1038/s41598-022-15520-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Accepted: 06/24/2022] [Indexed: 01/19/2023] Open
Abstract
Acute myeloid leukemia (AML) is characterized by arrested differentiation making differentiation therapy a promising treatment strategy. Recent success of inhibitors of mutated isocitrate dehydrogenase (IDH) invigorated interest in differentiation therapy of AML so that several new drugs have been proposed, including inhibitors of dihydroorotate dehydrogenase (DHODH), an enzyme in pyrimidine synthesis. Cytarabine, a backbone of standard AML therapy, is known to induce differentiation at low doses, but the mechanism is not completely elucidated. We have previously reported that 5-aminoimidazole-4-carboxamide ribonucleoside (AICAr) and brequinar, a DHODH inhibitor, induced differentiation of myeloid leukemia by activating the ataxia telangiectasia and Rad3-related (ATR)/checkpoint kinase 1 (Chk1) via pyrimidine depletion. In this study, using immunoblotting, flow cytometry analyses, pharmacologic inhibitors and genetic inactivation of Chk1 in myeloid leukemia cell lines, we show that low dose cytarabine induces differentiation by activating Chk1. In addition, cytarabine induces differentiation ex vivo in a subset of primary AML samples that are sensitive to AICAr and DHODH inhibitor. The results of our study suggest that leukemic cell differentiation stimulated by low doses of cytarabine depends on the activation of Chk1 and thus shares the same pathway as pyrimidine synthesis inhibitors.
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Affiliation(s)
- Barbara Tomic
- grid.4808.40000 0001 0657 4636Croatian Institute for Brain Research, University of Zagreb School of Medicine, Salata 3, 10 000 Zagreb, Croatia ,grid.4808.40000 0001 0657 4636Department of Physiology, University of Zagreb School of Medicine, Zagreb, Croatia
| | - Tomislav Smoljo
- grid.4808.40000 0001 0657 4636Croatian Institute for Brain Research, University of Zagreb School of Medicine, Salata 3, 10 000 Zagreb, Croatia ,grid.4808.40000 0001 0657 4636Department of Physiology, University of Zagreb School of Medicine, Zagreb, Croatia
| | - Hrvoje Lalic
- grid.4808.40000 0001 0657 4636Croatian Institute for Brain Research, University of Zagreb School of Medicine, Salata 3, 10 000 Zagreb, Croatia ,grid.4808.40000 0001 0657 4636Department of Physiology, University of Zagreb School of Medicine, Zagreb, Croatia
| | - Vilma Dembitz
- grid.4808.40000 0001 0657 4636Croatian Institute for Brain Research, University of Zagreb School of Medicine, Salata 3, 10 000 Zagreb, Croatia ,grid.4808.40000 0001 0657 4636Department of Physiology, University of Zagreb School of Medicine, Zagreb, Croatia
| | - Josip Batinic
- grid.412688.10000 0004 0397 9648Division of Hematology, Department of Internal Medicine, University Hospital Centre Zagreb, Zagreb, Croatia
| | - Drago Batinic
- grid.4808.40000 0001 0657 4636Department of Physiology, University of Zagreb School of Medicine, Zagreb, Croatia ,grid.412688.10000 0004 0397 9648Department of Laboratory Immunology, University Hospital Centre Zagreb, Zagreb, Croatia
| | - Antonio Bedalov
- grid.270240.30000 0001 2180 1622Clinical Research Division, Fred Hutchinson Cancer Research Centre, Seattle, WA USA
| | - Dora Visnjic
- grid.4808.40000 0001 0657 4636Croatian Institute for Brain Research, University of Zagreb School of Medicine, Salata 3, 10 000 Zagreb, Croatia ,grid.4808.40000 0001 0657 4636Department of Physiology, University of Zagreb School of Medicine, Zagreb, Croatia
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7
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Messling JE, Agger K, Andersen KL, Kromer K, Kuepper HM, Lund AH, Helin K. Targeting RIOK2 ATPase activity leads to decreased protein synthesis and cell death in acute myeloid leukemia. Blood 2022; 139:245-255. [PMID: 34359076 PMCID: PMC8759535 DOI: 10.1182/blood.2021012629] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2021] [Accepted: 07/29/2021] [Indexed: 01/16/2023] Open
Abstract
Novel therapies for the treatment of acute myeloid leukemia (AML) are urgently needed, because current treatments do not cure most patients with AML. We report a domain-focused, kinome-wide CRISPR-Cas9 screening that identified protein kinase targets for the treatment of AML, which led to the identification of Rio-kinase 2 (RIOK2) as a potential novel target. Loss of RIOK2 led to a decrease in protein synthesis and to ribosomal instability followed by apoptosis in leukemic cells, but not in fibroblasts. Moreover, the ATPase function of RIOK2 was necessary for cell survival. When a small-molecule inhibitor was used, pharmacological inhibition of RIOK2 similarly led to loss of protein synthesis and apoptosis and affected leukemic cell growth in vivo. Our results provide proof of concept for targeting RIOK2 as a potential treatment of patients with AML.
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Affiliation(s)
- Jan-Erik Messling
- Biotech Research and Innovation Centre and
- The Novo Nordisk Foundation Center for Stem Cell Biology (DanStem), University of Copenhagen, Copenhagen, Denmark; and
| | - Karl Agger
- Biotech Research and Innovation Centre and
- The Novo Nordisk Foundation Center for Stem Cell Biology (DanStem), University of Copenhagen, Copenhagen, Denmark; and
| | | | - Kristina Kromer
- Biotech Research and Innovation Centre and
- The Novo Nordisk Foundation Center for Stem Cell Biology (DanStem), University of Copenhagen, Copenhagen, Denmark; and
| | - Hanna M Kuepper
- Biotech Research and Innovation Centre and
- The Novo Nordisk Foundation Center for Stem Cell Biology (DanStem), University of Copenhagen, Copenhagen, Denmark; and
| | | | - Kristian Helin
- Biotech Research and Innovation Centre and
- The Novo Nordisk Foundation Center for Stem Cell Biology (DanStem), University of Copenhagen, Copenhagen, Denmark; and
- Cell Biology Program and
- Center for Epigenetics Research, Memorial Sloan Kettering Cancer Center, New York, NY
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8
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Takahashi S. Kinase Inhibitors and Interferons as Other Myeloid Differentiation Inducers in Leukemia Therapy. Acta Haematol 2021; 145:113-121. [PMID: 34673646 DOI: 10.1159/000519769] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2021] [Accepted: 09/20/2021] [Indexed: 12/26/2022]
Abstract
Differentiation therapy using all-trans retinoic acid (ATRA) is well established for the treatment of acute promyelocytic leukemia (APL). Several attempts have been made to treat non-APL acute myeloid leukemia (AML) patients by employing differentiation inducers, such as hypomethylating agents and low-dose cytarabine, with encouraging results. In the present review, I focus on other possible differentiation inducers: kinase inhibitors and interferons (IFNs). A number of kinase inhibitors have been reported to induce differentiation, including CDK inhibitors, GSK3 inhibitors, Akt inhibitors, p38 MAPK inhibitors, Src family kinase inhibitors, Syk inhibitors, mTOR inhibitors, and HSP90 inhibitors. Other powerful inducers are IFNs, which were reported to enhance differentiation with ATRA. Although clinical trials for these kinase modulators remain scarce, their mechanisms of action have been, at least partly, clarified. The Raf/MEK/ERK MAPK pathway and the RARα downstream are affected by many of the kinase inhibitors and IFNs and seem to play a pivotal role for the induction of myeloid differentiation. Further clarification of the mechanisms, as well as the establishment of efficient combination therapies with the kinase inhibitors or IFNs, may lead to the development of effective therapeutic strategies for AML.
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Affiliation(s)
- Shinichiro Takahashi
- Division of Laboratory Medicine, Faculty of Medicine, Tohoku Medical and Pharmaceutical University, Sendai, Japan
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9
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Hultmark S, Baudet A, Schmiderer L, Prabhala P, Palma-Tortosa S, Sandén C, Fioretos T, Sasidharan R, Larsson C, Lehmann S, Juliusson G, Ek F, Magnusson M. Combinatorial molecule screening identified a novel diterpene and the BET inhibitor CPI-203 as differentiation inducers of primary acute myeloid leukemia cells. Haematologica 2021; 106:2566-2577. [PMID: 32855276 PMCID: PMC8485661 DOI: 10.3324/haematol.2020.249177] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2020] [Indexed: 12/24/2022] Open
Abstract
Combination treatment has proven effective for patients with acute promyelocytic leukemia, exemplifying the importance of therapy targeting multiple components of oncogenic regulation for a successful outcome. However, recent studies have shown that the mutational complexity of acute myeloid leukemia (AML) precludes the translation of molecular targeting into clinical success. Here, as a complement to genetic profiling, we used unbiased, combinatorial in vitro drug screening to identify pathways that drive AML and to develop personalized combinatorial treatments. First, we screened 513 natural compounds on primary AML cells and identified a novel diterpene (H4) that preferentially induced differentiation of FLT3 wild-type AML, while FLT3-ITD/mutations conferred resistance. The samples responding to H4, displayed increased expression of myeloid markers, a clear decrease in the nuclear-cytoplasmic ratio and the potential of re-activation of the monocytic transcriptional program reducing leukemia propagation in vivo. By combinatorial screening using H4 and molecules with defined targets, we demonstrated that H4 induces differentiation by the activation of the protein kinase C (PKC) signaling pathway, and in line with this, activates PKC phosphorylation and translocation of PKC to the cell membrane. Furthermore, the combinatorial screening identified a bromo- and extra-terminal domain (BET) inhibitor that could further improve H4-dependent leukemic differentiation in FLT3 wild-type monocytic AML. These findings illustrate the value of an unbiased, multiplex screening platform for developing combinatorial therapeutic approaches for AML.
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Affiliation(s)
- Simon Hultmark
- Division of Molecular Medicine and Gene Therapy, Lund Stem Cell Center, Lund University, Sweden
| | - Aurélie Baudet
- Division of Molecular Medicine and Gene Therapy, Lund Stem Cell Center, Lund University, Sweden
| | - Ludwig Schmiderer
- Division of Molecular Medicine and Gene Therapy, Lund Stem Cell Center, Lund University, Sweden
| | - Pavan Prabhala
- Division of Molecular Medicine and Gene Therapy, Lund Stem Cell Center, Lund University, Lund, Sweden
| | - Sara Palma-Tortosa
- Laboratory of Stem Cells and Restorative Neurology, Lund Stem Cell Center, Lund University, Lund, Sweden
| | - Carl Sandén
- Division of Clinical Genetics, Department of Laboratory Medicine, Lund University, Lund, Sweden
| | - Thoas Fioretos
- Division of Clinical Genetics, Department of Laboratory Medicine, Lund University, Lund, Sweden
| | | | - Christer Larsson
- Division of Translational Cancer Research, Lund University, Lund, Sweden
| | - Sören Lehmann
- Department of Medicine, Karolinska Institute, Stockholm, Sweden
| | - Gunnar Juliusson
- Department of Hematology, Skane University Hospital, Lund, Sweden
| | - Fredrik Ek
- Chemical Biology and Therapeutics, Lund University, Lund, Sweden
| | - Mattias Magnusson
- Division of Molecular Medicine and Gene Therapy, Lund Stem Cell Center, Lund University, Sweden
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Yang Y, Dai Y, Yang X, Wu S, Wang Y. DNMT3A Mutation-Induced CDK1 Overexpression Promotes Leukemogenesis by Modulating the Interaction between EZH2 and DNMT3A. Biomolecules 2021; 11:biom11060781. [PMID: 34067359 PMCID: PMC8224654 DOI: 10.3390/biom11060781] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2021] [Revised: 05/14/2021] [Accepted: 05/19/2021] [Indexed: 12/22/2022] Open
Abstract
DNMT3A mutations are frequently identified in acute myeloid leukemia (AML) and indicate poor prognosis. Previously, we found that the hotspot mutation DNMT3A R882H could upregulate CDK1 and induce AML in conditional knock-in mice. However, the mechanism by which CDK1 is involved in leukemogenesis of DNMT3A mutation-related AML, and whether CDK1 could be a therapeutic target, remains unclear. In this study, using fluorescence resonance energy transfer and immunoprecipitation analysis, we discovered that increased CDK1 could compete with EZH2 to bind to the PHD-like motif of DNMT3A, which may disturb the protein interaction between EZH2 and DNMT3A. Knockdown of CDK1 in OCI-AML3 cells with DNMT3A mutation markedly inhibited proliferation and induced apoptosis. CDK1 selective inhibitor CGP74514A (CGP) and the pan-CDK inhibitor flavopiridol (FLA) arrested OCI-AML3 cells in the G2/M phase, and induced cell apoptosis. CGP significantly increased CD163-positive cells. Moreover, the combined application of CDK1 inhibitor and traditional chemotherapy drugs synergistically inhibited proliferation and induced apoptosis of OCI-AML3 cells. In conclusion, this study highlights CDK1 overexpression as a pathogenic factor and a potential therapeutic target for DNMT3A mutation-related AML.
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11
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Madan V, Koeffler HP. Differentiation therapy of myeloid leukemia: four decades of development. Haematologica 2021; 106:26-38. [PMID: 33054125 PMCID: PMC7776344 DOI: 10.3324/haematol.2020.262121] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Accepted: 09/15/2020] [Indexed: 02/06/2023] Open
Abstract
Acute myeloid leukemia is characterized by arrested differentiation, and agents that overcome this block are therapeutically useful, as shown by the efficacy of all-trans retinoic acid in acute promyelocytic leukemia. However, the early promise of differentiation therapy did not translate into clinical benefit for other subtypes of acute myeloid leukemia, in which cytotoxic chemotherapeutic regimens remained the standard of care. Recent advances, including insights from sequencing of acute myeloid leukemia genomes, have led to the development of targeted therapies, comprising agents that induce differentiation of leukemic cells in preclinical models and clinical trials, thus rejuvenating interest in differentiation therapy. These agents act on various cellular processes including dysregulated metabolic programs, signaling pathways, epigenetic machinery and the cell cycle. In particular, inhibitors of mutant IDH1/2 and FLT3 have shown clinical benefit, leading to approval by regulatory bodies of their use. Besides the focus on recently approved differentiation therapies, this review also provides an overview of differentiation- inducing agents being tested in clinical trials or investigated in preclinical research. Combinatorial strategies are currently being tested for several agents (inhibitors of KDM1A, DOT1L, BET proteins, histone deacetylases), which were not effective in clinical studies as single agents, despite encouraging anti-leukemic activity observed in preclinical models. Overall, recently approved drugs and new investigational agents being developed highlight the merits of differentiation therapy; and ongoing studies promise further advances in the treatment of acute myeloid leukemia in the near future.
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Affiliation(s)
- Vikas Madan
- Cancer Science Institute of Singapore, National University of Singapore.
| | - H Phillip Koeffler
- Cancer Science Institute of Singapore, National University of Singapore; Cedars-Sinai Medical Center, Division of Hematology/Oncology, UCLA School of Medicine, Los Angeles, CA, USA; Department of Hematology-Oncology, National University Cancer Institute of Singapore (NCIS), National University Hospital.
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12
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Maia J, Otake AH, Poças J, Carvalho AS, Beck HC, Magalhães A, Matthiesen R, Strano Moraes MC, Costa-Silva B. Transcriptome Reprogramming of CD11b + Bone Marrow Cells by Pancreatic Cancer Extracellular Vesicles. Front Cell Dev Biol 2020; 8:592518. [PMID: 33330473 PMCID: PMC7729189 DOI: 10.3389/fcell.2020.592518] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Accepted: 10/27/2020] [Indexed: 12/12/2022] Open
Abstract
Pancreatic cancers (PC) are highly metastatic with poor prognosis, mainly due to delayed detection. We previously showed that PC-derived extracellular vesicles (EVs) act on macrophages residing in the liver, eliciting extracellular matrix remodeling in this organ and marked hepatic accumulation of CD11b+ bone marrow (BM) cells, which support PC liver metastasis. We here show that PC-EVs also bind to CD11b+ BM cells and induce the expansion of this cell population. Transcriptomic characterization of these cells shows that PC-EVs upregulate IgG and IgA genes, which have been linked to the presence of monocytes/macrophages in tumor microenvironments. We also report here the transcriptional downregulation of genes linked to monocyte/macrophage activation, trafficking, and expression of inflammatory molecules. Together, these results show for the first time the existence of a PC-BM communication axis mediated by EVs with a potential role in PC tumor microenvironments.
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Affiliation(s)
- Joana Maia
- Champalimaud Centre for the Unknown, Champalimaud Foundation, Lisbon, Portugal
- Graduate Program in Areas of Basic and Applied Biology, University of Porto, Porto, Portugal
| | - Andreia Hanada Otake
- Champalimaud Centre for the Unknown, Champalimaud Foundation, Lisbon, Portugal
- Center for Translational Research in Oncology, Instituto do Câncer do Estado de São Paulo, Hospital das Clínicas, Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brazil
| | - Juliana Poças
- i3S – Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal
- IPATIMUP – Instituto de Patologia e Imunologia Molecular da Universidade do Porto, Porto, Portugal
- Instituto de Ciências Biomédicas Abel Salazar, University of Porto, Porto, Portugal
| | - Ana Sofia Carvalho
- Computational and Experimental Biology Group, CEDOC, Chronic Diseases Research Centre, NOVA Medical School, Faculdade de Ciencias Medicas, Universidade NOVA de Lisboa, Lisbon, Portugal
| | - Hans Christian Beck
- Centre for Clinical Proteomics, Department of Clinical Biochemistry and Pharmacology, Odense University Hospital, Odense, Denmark
| | - Ana Magalhães
- i3S – Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal
- IPATIMUP – Instituto de Patologia e Imunologia Molecular da Universidade do Porto, Porto, Portugal
| | - Rune Matthiesen
- Computational and Experimental Biology Group, CEDOC, Chronic Diseases Research Centre, NOVA Medical School, Faculdade de Ciencias Medicas, Universidade NOVA de Lisboa, Lisbon, Portugal
| | | | - Bruno Costa-Silva
- Champalimaud Centre for the Unknown, Champalimaud Foundation, Lisbon, Portugal
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E3 ligase SCF SKP2 ubiquitinates and degrades tumor suppressor C/EBPα in acute myeloid leukemia. Life Sci 2020; 257:118041. [PMID: 32622945 DOI: 10.1016/j.lfs.2020.118041] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Revised: 06/18/2020] [Accepted: 06/29/2020] [Indexed: 12/23/2022]
Abstract
AIM Transcription factor CCAAT/Enhancer binding protein alpha (C/EBPα) is a key regulator of myeloid differentiation, granulopoiesis in particular. Although CEBPA mutations are found in more than 10% in AML, functional inhibition of C/EBPα protein is also widely observed in AML. Here, we sought to examine if SKP2, an aberrantly enhanced E3 ubiquitin ligase in primary AMLs inhibits C/EBPα stability to induce differentiation block. MAIN METHODS Here we employed cell based assays such as transfections, immunoblotting, co-immunoprecipitation, luciferase and gel shift assays along with differentiation assays to investigate SKP2 regulated C/EBPα protein stability in acute myeloid leukemia. KEY FINDINGS Here we discovered that oncogenic E3 ubiquitin ligase SCFskp2 ubiquitinates and destabilizes C/EBPα in a proteasome-dependent manner. Our data demonstrates that SKP2 physically interacts with C-terminal of C/EBPα and promotes its K48-linked ubiquitination-mediated degradation leading to its reduced transactivation potential, DNA binding ability and cellular functions. We further show that while overexpression of SKP2 inhibits both ectopic as well as endogenous C/EBPα in heterologous (HEK293T) as well as myeloid leukemia cells respectively, SKP2 depletion restores endogenous C/EBPα leading to reduced colony formation and enhanced myeloid differentiation of myeloid leukemia cells. Using Estradiol-inducible K562-C/EBPα-ER cells as yet another model of granulocytic differentiation, we further confirmed that SKP2 overexpression indeed inhibits granulocytic differentiation by mitigating C/EBPα stability. SIGNIFICANCE Our findings identify SKP2 as a potential negative regulator of C/EBPα stability and function in AML which suggests that SKP2 can be potentially targeted in AML to restore C/EBPα and overcome differentiation block.
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14
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Abstract
Objective: To summarize the abnormal location of FLT3 caused by different glycosylation status which further leads to the distinguishing signaling pathways and discuss targeting on FLT3 glycosylation by drugs reported in recent literatures. Methods: We review FLT3 glycosylation in endoplasmic reticulum. The abnormal signal of mutant FLT3 with different glycosylation status is discussed. We also address potential FLT3 glycosylation-targeting strategies for the treatment. Results: Inhibition of FLT3 mutant cells by drugs reported in recent literatures involves the influence of glycosylation of FLT3: 2-deoxy-D-glucose, Tunicamycin and Fluvastatin are reported to inhibit N-glycosylation of FLT3; Pim-1 inhibitors are proved to block the inhibition of Pim-1 on FLT3 Oglycosylation; HSP90 inhibitors and Tyrosine Kinase Inhibitors are shown to increase fully glycosylated form of FLT3. Discussion: The FMS-like tyrosine kinase 3 (FLT3) gene expressed only in CD34+ progenitor cells in bone marrow is located on chromosome 13q12 encoding FLT3 protein. FLT3 is initially synthesized as a 110 KD protein, which glycosylated in the endoplasmic reticulum to a 130 KD immature protein rich in mannose, and further processed into a mature 160 KD protein in the Golgi apparatus, which could be transferred to the cell surface. Therapy targeting on FLT3 glycosylation is a promising direction for AML treatment. Conclusions: The abnormal location of FLT3 caused by different glycosylation status leads to the distinguishing signaling pathways. Targeting on FLT3 glycosylation may provide a new perspective for therapeutic strategies. Abbreviations: ABCG2: ATP-binding cassette transporter breast cancer resistance protein; ATF: activating transcription factor; AML: acute myeloid leukemia; CHOP: CCAAT-enhancer-binding protein homologous protein; 2-DG: 2-deoxy-D-glucose; EFS: event free survival; EPO: erythropoietin; EPOR: erythropoietin receptor; ERS: endoplasmic reticulum stress; FLT3: FMS-like tyrosine kinase 3; GPI: glycosylphosphatidylinositol; HSP: heat shock protein; ITD: internal tandem duplication; IRE1a: inositol-requiring enzyme 1 alpha; JNK: c-Jun N-terminal kinase; JMD: juxtamembrane domain; JAK: janus kinase; MAPK/ERK: mitogen activated protein kinase/extracellular signal-regulated protein kinase; OS: overall survival; PI3K/AKT: phosphatidylinositide 3-kinases/protein kinase B; PERK: RNA-activated protein kinase-like endoplasmic reticulum kinase; Pgp: P-glycoprotein; PTX3: human pentraxin-3; STAT: signal transducer and activator of transcriptions; TKD: tyrosine-kinase domain; TKI: tyrosine kinase inhibitor; TM: Tunicamycin; UPR: unfolded protein reaction.
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Affiliation(s)
- Xiaoli Hu
- Department of Hematology, RenJi Hospital, School of Medicine, Shanghai Jiao Tong University , Shanghai , People's Republic of China
| | - Fangyuan Chen
- Department of Hematology, RenJi Hospital, School of Medicine, Shanghai Jiao Tong University , Shanghai , People's Republic of China
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15
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Wilhelmson AS, Porse BT. CCAAT enhancer binding protein alpha (CEBPA) biallelic acute myeloid leukaemia: cooperating lesions, molecular mechanisms and clinical relevance. Br J Haematol 2020; 190:495-507. [PMID: 32086816 PMCID: PMC7496298 DOI: 10.1111/bjh.16534] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Recent advances in sequencing technologies have allowed for the identification of recurrent mutations in acute myeloid leukaemia (AML). The transcription factor CCAAT enhancer binding protein alpha (CEBPA) is frequently mutated in AML, and biallelic CEBPA-mutant AML was recognised as a separate disease entity in the recent World Health Organization classification. However, CEBPA mutations are co-occurring with other aberrations in AML, and together these lesions form the clonal hierarchy that comprises the leukaemia in the patient. Here, we aim to review the current understanding of co-occurring mutations in CEBPA-mutated AML and their implications for disease biology and clinical outcome. We will put emphasis on patterns of cooperation, how these lesions cooperate with CEBPA mutations and the underlying potential molecular mechanisms. Finally, we will relate this to patient outcome and future options for personalised medicine.
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Affiliation(s)
- Anna S Wilhelmson
- The Finsen Laboratory, Rigshospitalet, Faculty of Health Sciences, University of Copenhagen, Copenhagen, Denmark.,Biotech Research and Innovation Centre (BRIC), University of Copenhagen, Copenhagen, Denmark.,Danish Stem Cell Center (DanStem), Faculty of Health Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Bo T Porse
- The Finsen Laboratory, Rigshospitalet, Faculty of Health Sciences, University of Copenhagen, Copenhagen, Denmark.,Biotech Research and Innovation Centre (BRIC), University of Copenhagen, Copenhagen, Denmark.,Danish Stem Cell Center (DanStem), Faculty of Health Sciences, University of Copenhagen, Copenhagen, Denmark
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16
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Abdelaziz AM, Diab S, Islam S, Basnet SKC, Noll B, Li P, Mekonnen LB, Lu J, Albrecht H, Milne RW, Gerber C, Yu M, Wang S. Discovery of N-Phenyl-4-(1H-pyrrol-3-yl)pyrimidin-2-amine Derivatives as Potent Mnk2 Inhibitors: Design, Synthesis, SAR Analysis, and Evaluation of in vitro Anti-leukaemic Activity. Med Chem 2019; 15:602-623. [PMID: 30569866 DOI: 10.2174/1573406415666181219111511] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2018] [Revised: 12/03/2018] [Accepted: 12/11/2018] [Indexed: 01/25/2023]
Abstract
BACKGROUND Aberrant expression of eukaryotic translation initiation factor 4E (eIF4E) is common in many types of cancer including acute myeloid leukaemia (AML). Phosphorylation of eIF4E by MAPK-interacting kinases (Mnks) is essential for the eIF4E-mediated oncogenic activity. As such, the pharmacological inhibition of Mnks can be an effective strategy for the treatment of cancer. METHODS A series of N-phenyl-4-(1H-pyrrol-3-yl)pyrimidin-2-amine derivatives was designed and synthesised. The Mnk inhibitory activity of these derivatives as well as their anti-proliferative activity against MV4-11 AML cells was determined. RESULTS These compounds were identified as potent Mnk2 inhibitors. Most of them demonstrated potent anti-proliferative activity against MV4-11 AML cells. The cellular mechanistic studies of the representative inhibitors revealed that they reduced the level of phosphorylated eIF4E and induced apoptosis by down-regulating the anti-apoptotic protein myeloid cell leukaemia 1 (Mcl-1) and by cleaving poly(ADP-ribose)polymerase (PARP). The lead compound 7k possessed desirable pharmacokinetic properties and oral bioavailability. CONCLUSION This work proposes that exploration of the structural diversity in the context of Nphenyl- 4-(1H-pyrrol-3-yl)pyrimidin-2-amine would offer potent and selective Mnk inhibitors.
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Affiliation(s)
- Ahmed M Abdelaziz
- Centre for Drug Discovery and Development, Cancer Research Institute, School of Pharmacy and Medical Sciences, University of South Australia, Adelaide, South Australia 5001, Australia
| | - Sarah Diab
- Centre for Drug Discovery and Development, Cancer Research Institute, School of Pharmacy and Medical Sciences, University of South Australia, Adelaide, South Australia 5001, Australia
| | - Saiful Islam
- Centre for Drug Discovery and Development, Cancer Research Institute, School of Pharmacy and Medical Sciences, University of South Australia, Adelaide, South Australia 5001, Australia
| | - Sunita K C Basnet
- Centre for Drug Discovery and Development, Cancer Research Institute, School of Pharmacy and Medical Sciences, University of South Australia, Adelaide, South Australia 5001, Australia
| | - Benjamin Noll
- Centre for Drug Discovery and Development, Cancer Research Institute, School of Pharmacy and Medical Sciences, University of South Australia, Adelaide, South Australia 5001, Australia
| | - Peng Li
- Centre for Drug Discovery and Development, Cancer Research Institute, School of Pharmacy and Medical Sciences, University of South Australia, Adelaide, South Australia 5001, Australia
| | - Laychiluh B Mekonnen
- Centre for Drug Discovery and Development, Cancer Research Institute, School of Pharmacy and Medical Sciences, University of South Australia, Adelaide, South Australia 5001, Australia
| | - Jingfeng Lu
- Centre for Drug Discovery and Development, Cancer Research Institute, School of Pharmacy and Medical Sciences, University of South Australia, Adelaide, South Australia 5001, Australia
| | - Hugo Albrecht
- Centre for Drug Discovery and Development, Cancer Research Institute, School of Pharmacy and Medical Sciences, University of South Australia, Adelaide, South Australia 5001, Australia
| | - Robert W Milne
- Centre for Drug Discovery and Development, Cancer Research Institute, School of Pharmacy and Medical Sciences, University of South Australia, Adelaide, South Australia 5001, Australia
| | - Cobus Gerber
- Centre for Drug Discovery and Development, Cancer Research Institute, School of Pharmacy and Medical Sciences, University of South Australia, Adelaide, South Australia 5001, Australia
| | - Mingfeng Yu
- Centre for Drug Discovery and Development, Cancer Research Institute, School of Pharmacy and Medical Sciences, University of South Australia, Adelaide, South Australia 5001, Australia
| | - Shudong Wang
- Centre for Drug Discovery and Development, Cancer Research Institute, School of Pharmacy and Medical Sciences, University of South Australia, Adelaide, South Australia 5001, Australia
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17
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Dembitz V, Tomic B, Kodvanj I, Simon JA, Bedalov A, Visnjic D. The ribonucleoside AICAr induces differentiation of myeloid leukemia by activating the ATR/Chk1 via pyrimidine depletion. J Biol Chem 2019; 294:15257-15270. [PMID: 31431503 PMCID: PMC6802504 DOI: 10.1074/jbc.ra119.009396] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2019] [Revised: 08/16/2019] [Indexed: 12/17/2022] Open
Abstract
Metabolic pathways play important roles in proliferation and differentiation of malignant cells. 5-Aminoimidazole-4-carboxamide ribonucleoside (AICAr), a precursor in purine biosynthesis and a well-established activator of AMP-activated protein kinase (AMPK), induces widespread metabolic alterations and is commonly used for dissecting the role of metabolism in cancer. We have previously reported that AICAr promotes differentiation and inhibits proliferation of myeloid leukemia cells. Here, using metabolic assays, immunoblotting, flow cytometry analyses, and siRNA-mediated gene silencing in leukemia cell lines, we show that AICAr-mediated differentiation was independent of the known metabolic effects of AMPK, including glucose consumption, but instead depends on the activation of the DNA damage–associated enzyme checkpoint kinase 1 (Chk1) induced by pyrimidine depletion. LC/MS/MS metabolomics analysis revealed that AICAr increases orotate levels and decreases uridine monophosphate (UMP) levels, consistent with inhibition of UMP synthesis at a step downstream of dihydroorotate dehydrogenase (DHODH). AICAr and the DHODH inhibitor brequinar had similar effects on differentiation markers and S-phase arrest, and genetic or pharmacological Chk1 inactivation abrogated both of these effects. Our results delineate an AMPK-independent effect of AICAr on myeloid leukemia differentiation that involves perturbation of pyrimidine biosynthesis and activation of the DNA damage response network.
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Affiliation(s)
- Vilma Dembitz
- Department of Physiology and Croatian Institute for Brain Research, School of Medicine, University of Zagreb, 10 000 Zagreb, Croatia
| | - Barbara Tomic
- Department of Physiology and Croatian Institute for Brain Research, School of Medicine, University of Zagreb, 10 000 Zagreb, Croatia
| | - Ivan Kodvanj
- Department of Physiology and Croatian Institute for Brain Research, School of Medicine, University of Zagreb, 10 000 Zagreb, Croatia
| | - Julian A Simon
- Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, Washington 98109
| | - Antonio Bedalov
- Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, Washington 98109
| | - Dora Visnjic
- Department of Physiology and Croatian Institute for Brain Research, School of Medicine, University of Zagreb, 10 000 Zagreb, Croatia
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Tallis E, Borthakur G. Novel treatments for relapsed/refractory acute myeloid leukemia with FLT3 mutations. Expert Rev Hematol 2019; 12:621-640. [PMID: 31232619 DOI: 10.1080/17474086.2019.1635882] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Introduction: Mutations in the gene encoding for the FMS-like tyrosine kinase 3 (FLT3) are present in about 30% of adults with AML and are associated with shorter disease-free and overall survival after initial therapy. Prognosis of relapsed/refractory AML with FLT3 mutations is even more dismal with median overall survival of a few months only. Areas covered: This review will cover current and emerging treatments for relapsed/refractory AML with FLT3 mutations, preclinical rationale and clinical trials with new encouraging data for this particularly challenging population. The authors discuss mechanisms of resistance to FLT3 inhibitors and how these insights serve to identify current and future treatments. As allogeneic stem cell transplant in the first remission is the preferred therapy for newly diagnosed AML patients with FLT3 mutations, the authors discuss the role of maintenance after SCT for the prevention of relapse. Expert opinion: Relapsed/refractory AML with FLT3 mutations remains a therapeutic challenge with currently available treatments. However, the evolution of targeted therapies with next-generation FLT3 inhibitors and their combinations with chemotherapy is showing much promise. Moreover, growing understanding of the pathways of resistance to treatment has led to the identification of various targeted therapies currently being explored, which in time will improve outcomes.
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Affiliation(s)
- Eran Tallis
- a Department of Leukemia, The University of Texas MD Anderson Cancer Center , Houston , TX , USA
| | - Gautam Borthakur
- a Department of Leukemia, The University of Texas MD Anderson Cancer Center , Houston , TX , USA
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High expression of CDK1 and BUB1 predicts poor prognosis of pancreatic ductal adenocarcinoma. Gene 2019; 701:15-22. [PMID: 30898709 DOI: 10.1016/j.gene.2019.02.081] [Citation(s) in RCA: 80] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2018] [Revised: 02/14/2019] [Accepted: 02/20/2019] [Indexed: 12/19/2022]
Abstract
BACKGROUND Pancreatic ductal adenocarcinoma (PDAC) is one of the most common causes of cancer-related death. Increasing evidence suggests that cell cycle dysregulation is one of the hallmarks of cancer. In this study, by using the GEO database, we predicted the cell cycle-related protein CDK1 and BUB1 to be significantly overexpressed in PDAC tissues. Thus, this study aimed to investigate the clinical pathological significance of CDK1 and BUB1 in PDAC. METHODS To explore the role of CDK1 and BUB1 in PDAC progression and evaluate their prognostic value, we investigated the expression patterns of CDK1 and BUB1 by using immunohistochemical staining in 99 PDAC and 71 normal pancreatic tissues with complete pathological parameters and survival data. RESULTS CDK1 and BUB1 were significantly overexpressed in PDAC tissues. The expression of CDK1 was correlated with tumor size and histological grade, and the expression of BUB1 was correlated with the tumor size of PDAC. With regard to survival, a high expression of either CDK1 or BUB1 was correlated with a short survival of PDAC patients. Additionally, PDAC patients with a concurrent high expression of CDK1 and BUB1 showed the shortest survival. CONCLUSIONS Our study demonstrated that CDK1 and BUB1 may play a role in PDAC progression and could be prognostic biomarkers for PDAC patients.
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20
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Lu J, Lin JX, Zhang PY, Sun YQ, Li P, Xie JW, Wang JB, Chen QY, Cao LL, Lin Y, Huang CM, Zheng CH. CDK5 suppresses the metastasis of gastric cancer cells by interacting with and regulating PP2A. Oncol Rep 2018; 41:779-788. [PMID: 30431123 PMCID: PMC6312987 DOI: 10.3892/or.2018.6860] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2018] [Accepted: 10/16/2018] [Indexed: 02/07/2023] Open
Abstract
Several previous studies have demonstrated that cyclin‑dependent kinase (CDK)‑5 expression serves an important role in promoting the development of malignant tumours. We have previously reported that CDK5 suppresses gastric tumourigenesis. The aim of the present study was to investigate the mechanistic basis of CDK5. The results of immunoprecipitation and western blot analysis demonstrated that CDK5 could interact with serine/threonine‑protein phosphatase 2A (PP2A). The use of an inhibitor of PP2A in CDK5‑overexpressing gastric cancer (GC) cell lines antagonized CDK5‑mediated suppression in GC cells. Further analysis revealed that PP2A expression was downregulated in GC and patients with low levels of PP2A had worse survival outcomes than those with high levels of PP2A (P=0.035). Therefore, the present study provided a novel mechanism for CDK5‑mediated tumour suppression, suggesting that CDK5 may be an attractive target for future therapeutic strategies for treating GC. In addition, low levels of PP2A may indicate a tendency for poor prognosis in patients with GC.
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Affiliation(s)
- Jun Lu
- Department of Gastric Surgery, Fujian Medical University Union Hospital, Fuzhou, Fuzhou, Fujian 350000, P.R. China
| | - Jian-Xian Lin
- Department of Gastric Surgery, Fujian Medical University Union Hospital, Fuzhou, Fuzhou, Fujian 350000, P.R. China
| | - Peng-Yang Zhang
- Department of Gastric Surgery, Fujian Medical University Union Hospital, Fuzhou, Fuzhou, Fujian 350000, P.R. China
| | - Yu-Qin Sun
- Department of Gastric Surgery, Fujian Medical University Union Hospital, Fuzhou, Fuzhou, Fujian 350000, P.R. China
| | - Ping Li
- Department of Gastric Surgery, Fujian Medical University Union Hospital, Fuzhou, Fuzhou, Fujian 350000, P.R. China
| | - Jian-Wei Xie
- Department of Gastric Surgery, Fujian Medical University Union Hospital, Fuzhou, Fuzhou, Fujian 350000, P.R. China
| | - Jia-Bin Wang
- Department of Gastric Surgery, Fujian Medical University Union Hospital, Fuzhou, Fuzhou, Fujian 350000, P.R. China
| | - Qi-Yue Chen
- Department of Gastric Surgery, Fujian Medical University Union Hospital, Fuzhou, Fuzhou, Fujian 350000, P.R. China
| | - Long-Long Cao
- Department of Gastric Surgery, Fujian Medical University Union Hospital, Fuzhou, Fuzhou, Fujian 350000, P.R. China
| | - Yao Lin
- College of Life Sciences, Fujian Normal University, Fuzhou, Fujian 350000, P.R. China
| | - Chang-Ming Huang
- Department of Gastric Surgery, Fujian Medical University Union Hospital, Fuzhou, Fuzhou, Fujian 350000, P.R. China
| | - Chao-Hui Zheng
- Department of Gastric Surgery, Fujian Medical University Union Hospital, Fuzhou, Fuzhou, Fujian 350000, P.R. China
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SHI T, YE X. [Roles of CCAAT enhancer binding protein α in acute myeloblastic leukemia]. Zhejiang Da Xue Xue Bao Yi Xue Ban 2018; 47:552-557. [PMID: 30693699 PMCID: PMC10393672 DOI: 10.3785/j.issn.1008-9292.2018.10.16] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2018] [Accepted: 05/10/2018] [Indexed: 06/09/2023]
Abstract
The CCAAT enhancer binding protein α (C/EBP α:p42 and p30),which encoded by CCAAT enhancer binding protein α (C/EBPα) gene,plays a pretty crucial role in the regulation of myeloid hematopoiesis.The disorder of CEBPA gene expression is an pivotal mechanism of acute myeloid leukemia (AML). The result of uncontrolled expression of C/EBP α gene is the over-expression of p30 and the incomplete loss of p42, both of which contribute to the occurrence of AML. Restoring the expression ratio of C/EBP α such as over-expression of p42 or blocking the carcinogenic pathway of p30 seems to be important for the treatment of AML caused by such causes. In order to better guide medical decision-making, this article reviews research progress on C/EBPα in the pathogenesis of AML.
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Affiliation(s)
| | - Xiujin YE
- 叶琇锦(1962-), 女, 博士, 主任医师, 硕士生导师, 主要从事血液系统恶性疾病研究, E-mail:
,
https://orcid.org/0000-0003-1264-0307
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22
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Ubiquitin-dependent degradation of CDK2 drives the therapeutic differentiation of AML by targeting PRDX2. Blood 2018; 131:2698-2711. [PMID: 29720484 DOI: 10.1182/blood-2017-10-813139] [Citation(s) in RCA: 66] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2017] [Accepted: 04/27/2018] [Indexed: 12/23/2022] Open
Abstract
A distinct hallmark of acute myeloid leukemia (AML) is the arrest of leukemic myeloblasts at an immature stage of development. Therapies that overcome differentiation arrest have emerged as a powerful strategy for treating AML, but targeting leukemia differentiation remains challenging, mainly because of an incomplete mechanistic understanding of the process. Here, we unveil a new role for cyclin-dependent kinase 2 (CDK2) in blocking myeloid differentiation in AML. We show that among several interphase CDK, only CDK2 undergoes ubiquitin-dependent proteasome degradation, which is accompanied by AML cell differentiation. By using the yeast 2-hybrid system and functional analyses, KLHL6 was identified as a specific E3 ubiquitin ligase regulating the degradation of CDK2. Importantly, inhibiting CDK2, but not other cyclin-dependent kinases CDK1/4/6, effectively induced granulocytic differentiation in AML cell lines and 5 major subtypes of primary patient-derived AML samples. Mechanistically, CDK2 depletion led to the reactivation of differentiation pathway translation, and the differentiation blockade function of CDK2 may be achieved directly by maintaining the activity of PRDX2. Finally, CDK2 depletion arrested tumor growth of AML cells in nude mice and extended survival in both AML cell line and PDX-AML cells derived xenograft mouse models. Thus, our work not only provides experimental evidence for validating CDK2 as a potential therapeutic target for differentiation, but also uncovers the biological function of the CDK2-PRDX2 axis in blocking AML differentiation.
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23
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Liu WT, Wang Y, Zhang J, Ye F, Huang XH, Li B, He QY. A novel strategy of integrated microarray analysis identifies CENPA, CDK1 and CDC20 as a cluster of diagnostic biomarkers in lung adenocarcinoma. Cancer Lett 2018; 425:43-53. [PMID: 29608985 DOI: 10.1016/j.canlet.2018.03.043] [Citation(s) in RCA: 60] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2017] [Revised: 03/06/2018] [Accepted: 03/27/2018] [Indexed: 01/15/2023]
Abstract
Lung adenocarcinoma (LAC) is the most lethal cancer and the leading cause of cancer-related death worldwide. The identification of meaningful clusters of co-expressed genes or representative biomarkers may help improve the accuracy of LAC diagnoses. Public databases, such as the Gene Expression Omnibus (GEO), provide rich resources of valuable information for clinics, however, the integration of multiple microarray datasets from various platforms and institutes remained a challenge. To determine potential indicators of LAC, we performed genome-wide relative significance (GWRS), genome-wide global significance (GWGS) and support vector machine (SVM) analyses progressively to identify robust gene biomarker signatures from 5 different microarray datasets that included 330 samples. The top 200 genes with robust signatures were selected for integrative analysis according to "guilt-by-association" methods, including protein-protein interaction (PPI) analysis and gene co-expression analysis. Of these 200 genes, only 10 genes showed both intensive PPI network and high gene co-expression correlation (r > 0.8). IPA analysis of this regulatory networks suggested that the cell cycle process is a crucial determinant of LAC. CENPA, as well as two linked hub genes CDK1 and CDC20, are determined to be potential indicators of LAC. Immunohistochemical staining showed that CENPA, CDK1 and CDC20 were highly expressed in LAC cancer tissue with co-expression patterns. A Cox regression model indicated that LAC patients with CENPA+/CDK1+ and CENPA+/CDC20+ were high-risk groups in terms of overall survival. In conclusion, our integrated microarray analysis demonstrated that CENPA, CDK1 and CDC20 might serve as novel cluster of prognostic biomarkers for LAC, and the cooperative unit of three genes provides a technically simple approach for identification of LAC patients.
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Affiliation(s)
- Wan-Ting Liu
- Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, College of Life Science and Technology, Jinan University, Guangzhou, 510632, China
| | - Yang Wang
- Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, College of Life Science and Technology, Jinan University, Guangzhou, 510632, China
| | - Jing Zhang
- Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, College of Life Science and Technology, Jinan University, Guangzhou, 510632, China
| | - Fei Ye
- Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, College of Life Science and Technology, Jinan University, Guangzhou, 510632, China
| | - Xiao-Hui Huang
- Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, College of Life Science and Technology, Jinan University, Guangzhou, 510632, China
| | - Bin Li
- Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, College of Life Science and Technology, Jinan University, Guangzhou, 510632, China.
| | - Qing-Yu He
- Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, College of Life Science and Technology, Jinan University, Guangzhou, 510632, China.
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24
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Chen S, Yu J, Lv X, Zhang L. HOXA9 is critical in the proliferation, differentiation, and malignancy of leukaemia cells both in vitro and in vivo. Cell Biochem Funct 2017; 35:433-440. [PMID: 28961318 DOI: 10.1002/cbf.3293] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2017] [Revised: 08/02/2017] [Accepted: 08/10/2017] [Indexed: 12/12/2022]
Affiliation(s)
- Shibing Chen
- Department of Hematology; Yishui Center Hospital; Linyi Shandong Province China
| | - Juan Yu
- Department of Neurosurgery; Yishui Center Hospital; Linyi Shandong Province China
| | - Xin Lv
- Department of Hematology; Yishui Center Hospital; Linyi Shandong Province China
| | - Lijuan Zhang
- Department of Cardiology; Yishui Center Hospital; Linyi Shandong Province China
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25
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C/EBPα deregulation as a paradigm for leukemogenesis. Leukemia 2017; 31:2279-2285. [PMID: 28720765 DOI: 10.1038/leu.2017.229] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2017] [Revised: 06/19/2017] [Accepted: 06/27/2017] [Indexed: 12/21/2022]
Abstract
Myeloid master regulator CCAAT enhancer-binding protein alpha (C/EBPα) is deregulated by multiple mechanisms in leukemia. Inhibition of C/EBPα function plays pivotal roles in leukemogenesis. While much is known about how C/EBPα orchestrates granulopoiesis, our understanding of molecular transformation events, the role(s) of cooperating mutations and clonal evolution during C/EBPα deregulation in leukemia remains elusive. In this review, we will summarize the latest research addressing these topics with special emphasis on CEBPA mutations. We conclude by describing emerging therapeutic strategies to restore C/EBPα function.
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26
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Vitamin C-induced epigenomic remodelling in IDH1 mutant acute myeloid leukaemia. Leukemia 2017; 32:11-20. [PMID: 28663574 PMCID: PMC5770587 DOI: 10.1038/leu.2017.171] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2016] [Revised: 04/19/2017] [Accepted: 05/16/2017] [Indexed: 12/17/2022]
Abstract
The genomes of myeloid malignancies are characterized by epigenomic abnormalities. Heterozygous, inactivating ten-eleven translocation 2 (TET2) mutations and neomorphic isocitrate dehydrogenase (IDH) mutations are recurrent and mutually exclusive in acute myeloid leukaemia genomes. Ascorbic acid (vitamin C) has been shown to stimulate the catalytic activity of TET2 in vitro and thus we sought to explore its effect in a leukaemic model expressing IDH1R132H. Vitamin C treatment induced an IDH1R132H-dependent reduction in cell proliferation and an increase in expression of genes involved in leukocyte differentiation. Vitamin C induced differentially methylated regions that displayed a significant overlap with enhancers implicated in myeloid differentiation and were enriched in sequence elements for the haematopoietic transcription factors CEBPβ, HIF1α, RUNX1 and PU.1. Chromatin immunoprecipitation sequencing of PU.1 and RUNX1 revealed a significant loss of PU.1 and increase of RUNX1-bound DNA elements accompanied by their demethylation following vitamin C treatment. In addition, vitamin C induced an increase in H3K27ac flanking sites bound by RUNX1. On the basis of these data we propose a model of vitamin C-induced epigenetic remodelling of transcription factor-binding sites driving differentiation in a leukaemic model.
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Abstract
INTRODUCTION AML therapy remains very challenging despite our increased understanding of its molecular heterogeneity. Outcomes with chemotherapy and targeted therapy remain poor. Targeting cell cycle regulators might complement chemotherapy and targeted therapy and help in improving outcomes. Areas covered: Here we cover the pre-clinical and clinical data for both for cyclin dependent kinase (CDK) and cell-cycle checkpoint inhibitors. While CDK inhibition can inhibit proliferation, checkpoint inhibitors can facilitate cell cycle progression in presence of DNA damage and can induce mitotic catastrophe. Expert opinion: Though the preclinical data for cell cycle inhibitors in AML is compelling, the clinical translation so far has proven to be challenging. This is a reflection of the complexity of both, AML and cell cycle regulators. However, early introduction of cell-cycle active agents in combination with chemotherapy or targeted agents, identifying right sequence of use and identifying right biomarkers might pave the way into successful clinical translation.
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Affiliation(s)
- Abdallah Abou Zahr
- a Department of Leukemia , University of Texas MD Anderson Cancer Center , Houston , TX , USA
| | - Gautam Borthakur
- a Department of Leukemia , University of Texas MD Anderson Cancer Center , Houston , TX , USA
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28
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Hospital MA, Green AS, Maciel TT, Moura IC, Leung AY, Bouscary D, Tamburini J. FLT3 inhibitors: clinical potential in acute myeloid leukemia. Onco Targets Ther 2017; 10:607-615. [PMID: 28223820 PMCID: PMC5304990 DOI: 10.2147/ott.s103790] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Acute myeloid leukemia (AML) is an aggressive hematopoietic malignancy that is cured in as few as 15%–40% of cases. Tremendous improvements in AML prognostication arose from a comprehensive analysis of leukemia cell genomes. Among normal karyotype AML cases, mutations in the FLT3 gene are the ones most commonly detected as having a deleterious prognostic impact. FLT3 is a transmembrane tyrosine kinase receptor, and alterations of the FLT3 gene such as internal tandem duplications (FLT3-ITD) deregulate FLT3 downstream signaling pathways in favor of increased cell proliferation and survival. FLT3 tyrosine kinase inhibitors (TKI) emerged as a new therapeutic option in FLT3-ITD AML, and clinical trials are ongoing with a variety of TKI either alone, combined with chemotherapy, or even as maintenance after allogenic stem cell transplantation. However, a wide range of molecular resistance mechanisms are activated upon TKI therapy, thus limiting their clinical impact. Massive research efforts are now ongoing to develop more efficient FLT3 TKI and/or new therapies targeting these resistance mechanisms to improve the prognosis of FLT3-ITD AML patients in the future.
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Affiliation(s)
- Marie-Anne Hospital
- Département Développement, Reproduction, Cancer, Institut Cochin, Centre National de la Recherche Scientifique (CNRS), Unité Mixte de Recherche (UMR) 8104, Institut National de la Santé et de la Recherche Médicale (INSERM) U1016; Faculté de Médecine Sorbonne Paris Cité, Université Paris Descartes; Equipe Labellisée Ligue Nationale Contre le Cancer (LNCC)
| | - Alexa S Green
- Département Développement, Reproduction, Cancer, Institut Cochin, Centre National de la Recherche Scientifique (CNRS), Unité Mixte de Recherche (UMR) 8104, Institut National de la Santé et de la Recherche Médicale (INSERM) U1016; Faculté de Médecine Sorbonne Paris Cité, Université Paris Descartes; Equipe Labellisée Ligue Nationale Contre le Cancer (LNCC)
| | - Thiago T Maciel
- INSERM UMR 1163, Laboratory of Cellular and Molecular Mechanisms of Hematological Disorders and Therapeutic Implications; Paris Descartes - Sorbonne Paris Cité University; CNRS ERL 8254, Imagine Institute; Laboratory of Excellence GR-Ex, Paris, France
| | - Ivan C Moura
- INSERM UMR 1163, Laboratory of Cellular and Molecular Mechanisms of Hematological Disorders and Therapeutic Implications; Paris Descartes - Sorbonne Paris Cité University; CNRS ERL 8254, Imagine Institute; Laboratory of Excellence GR-Ex, Paris, France
| | - Anskar Y Leung
- Department of Medicine, Division of Hematology, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong, People's Republic of China
| | - Didier Bouscary
- Département Développement, Reproduction, Cancer, Institut Cochin, Centre National de la Recherche Scientifique (CNRS), Unité Mixte de Recherche (UMR) 8104, Institut National de la Santé et de la Recherche Médicale (INSERM) U1016; Faculté de Médecine Sorbonne Paris Cité, Université Paris Descartes; Equipe Labellisée Ligue Nationale Contre le Cancer (LNCC)
| | - Jerome Tamburini
- Département Développement, Reproduction, Cancer, Institut Cochin, Centre National de la Recherche Scientifique (CNRS), Unité Mixte de Recherche (UMR) 8104, Institut National de la Santé et de la Recherche Médicale (INSERM) U1016; Faculté de Médecine Sorbonne Paris Cité, Université Paris Descartes; Equipe Labellisée Ligue Nationale Contre le Cancer (LNCC)
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Tvedt TH, Nepstad I, Bruserud Ø. Antileukemic effects of midostaurin in acute myeloid leukemia - the possible importance of multikinase inhibition in leukemic as well as nonleukemic stromal cells. Expert Opin Investig Drugs 2016; 26:343-355. [PMID: 28001095 DOI: 10.1080/13543784.2017.1275564] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
INTRODUCTION Midostaurin is a multikinase inhibitor that inhibits receptor tyrosine kinases (Flt3, CD117/c-kit, platelet-derived growth factor receptor, vascular endothelial growth factor receptor 2) as well as non-receptor tyrosine kinases (Frg, Src, Syk, Protein kinase C). Combination of midostaurin with conventional intensive chemotherapy followed by one year maintenance monotherapy was recently reported to improve the survival of acute myeloid leukemia (AML) patients with Flt3 mutations. Areas covered: Relevant publications were identified through literature searches in the PubMed database. We searched for (i) original articles describing the results from clinical studies; (ii) published articles describing the importance of midostaurin-inhibited kinases for leukemogenesis and chemosensitivity. Expert opinion: Midostaurin monotherapy is well tolerated, combined with conventional chemotherapy gastrointestinal toxicity increases significantly. Midostaurin alters anthracycline pharmacokinetics. Furthermore, its antileukemic effects may not only be mediated through Flt3 inhibition alone; the inhibition of other kinases may also be important for the overall antileukemic effect. Midostaurin may then have direct effects on the leukemic cells but also indirect antileukemic effects through inhibition of the AML-supporting effects of neighboring stromal cells in the bone marrow microenvironment. Midostaurin may thus be used in combination with intensive chemotherapy, as maintenance treatment or as disease-stabilizing treatment for elderly unfit patients.
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Affiliation(s)
- Tor Henrik Tvedt
- a Section for Hematology, Department of Medicine , Haukeland University Hospital , Bergen , Norway
| | - Ina Nepstad
- b Section for Hematology , Institute of Clinical Science, University of Bergen , Bergen , Norway
| | - Øystein Bruserud
- a Section for Hematology, Department of Medicine , Haukeland University Hospital , Bergen , Norway.,b Section for Hematology , Institute of Clinical Science, University of Bergen , Bergen , Norway
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30
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Porter SN, Cluster AS, Yang W, Busken KA, Patel RM, Ryoo J, Magee JA. Fetal and neonatal hematopoietic progenitors are functionally and transcriptionally resistant to Flt3-ITD mutations. eLife 2016; 5. [PMID: 27879203 PMCID: PMC5153248 DOI: 10.7554/elife.18882] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2016] [Accepted: 11/21/2016] [Indexed: 12/24/2022] Open
Abstract
The FLT3 Internal Tandem Duplication (FLT3ITD) mutation is common in adult acute myeloid leukemia (AML) but rare in early childhood AML. It is not clear why this difference occurs. Here we show that Flt3ITD and cooperating Flt3ITD/Runx1 mutations cause hematopoietic stem cell depletion and myeloid progenitor expansion during adult but not fetal stages of murine development. In adult progenitors, FLT3ITD simultaneously induces self-renewal and myeloid commitment programs via STAT5-dependent and STAT5-independent mechanisms, respectively. While FLT3ITD can activate STAT5 signal transduction prior to birth, this signaling does not alter gene expression until hematopoietic progenitors transition from fetal to adult transcriptional states. Cooperative interactions between Flt3ITD and Runx1 mutations are also blunted in fetal/neonatal progenitors. Fetal/neonatal progenitors may therefore be protected from leukemic transformation because they are not competent to express FLT3ITD target genes. Changes in the transcriptional states of developing hematopoietic progenitors may generally shape the mutation spectra of human leukemias. DOI:http://dx.doi.org/10.7554/eLife.18882.001 Leukemias are a group of blood cancers that usually arise when immature blood cells gain one or more tumor-promoting genetic mutations. However, for reasons that are not clear, the mutations that cause leukemia are different in children and adults. For example, a mutation called FLT3ITD occurs relatively often in adult leukemia but is rare in infant leukemia. This raises the question of whether the blood cells of fetuses and babies are somehow protected from the effects of the mutation. Porter et al. have now compared the effects of the FLT3ITDmutation in blood cells from adult and fetal mice. In adult mice, the FLT3ITD mutation caused immature blood cells to turn different genes on and off. By contrast, the mutation had no effect on the activity of these genes in fetal mice. Furthermore, only the adult mutant cells showed changes that indicated the early stages of leukemia: the mutant blood cells of fetuses developed as normal. Porter et al. therefore concluded that the immature blood cells of fetuses are protected from the FLT3ITDmutation. To understand why fetal and adult blood cells respond differently to the FLT3ITDmutation, further experiments are needed to investigate how various genes regulate normal blood cell development. In addition, understanding why adult blood cells react to the FLT3ITDmutation might, in the future, lead to better treatment options for leukemia. DOI:http://dx.doi.org/10.7554/eLife.18882.002
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Affiliation(s)
- Shaina N Porter
- Division of Pediatric Hematology and Oncology, Department of Pediatrics, Washington University School of Medicine, St. Louis, United States
| | - Andrew S Cluster
- Division of Pediatric Hematology and Oncology, Department of Pediatrics, Washington University School of Medicine, St. Louis, United States
| | - Wei Yang
- Department of Genetics, Washington University School of Medicine, St. Louis, United States
| | - Kelsey A Busken
- Division of Pediatric Hematology and Oncology, Department of Pediatrics, Washington University School of Medicine, St. Louis, United States
| | - Riddhi M Patel
- Division of Pediatric Hematology and Oncology, Department of Pediatrics, Washington University School of Medicine, St. Louis, United States
| | - Jiyeon Ryoo
- Division of Pediatric Hematology and Oncology, Department of Pediatrics, Washington University School of Medicine, St. Louis, United States
| | - Jeffrey A Magee
- Division of Pediatric Hematology and Oncology, Department of Pediatrics, Washington University School of Medicine, St. Louis, United States.,Department of Genetics, Washington University School of Medicine, St. Louis, United States
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31
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Bertoli S, Boutzen H, David L, Larrue C, Vergez F, Fernandez-Vidal A, Yuan L, Hospital MA, Tamburini J, Demur C, Delabesse E, Saland E, Sarry JE, Galcera MO, Mansat-De Mas V, Didier C, Dozier C, Récher C, Manenti S. CDC25A governs proliferation and differentiation of FLT3-ITD acute myeloid leukemia. Oncotarget 2016; 6:38061-78. [PMID: 26515730 PMCID: PMC4741984 DOI: 10.18632/oncotarget.5706] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2015] [Accepted: 10/06/2015] [Indexed: 11/25/2022] Open
Abstract
We investigated cell cycle regulation in acute myeloid leukemia cells expressing the FLT3-ITD mutated tyrosine kinase receptor, an underexplored field in this disease. Upon FLT3 inhibition, CDC25A mRNA and protein were rapidly down-regulated, while levels of other cell cycle proteins remained unchanged. This regulation was dependent on STAT5, arguing for FLT3-ITD-dependent transcriptional regulation of CDC25A. CDC25 inhibitors triggered proliferation arrest and cell death of FLT3-ITD as well as FLT3-ITD/TKD AC-220 resistant cells, but not of FLT3-wt cells. Consistently, RNA interference-mediated knock-down of CDC25A reduced the proliferation of FLT3-ITD cell lines. Finally, the clonogenic capacity of primary FLT3-ITD AML cells was reduced by the CDC25 inhibitor IRC-083864, while FLT3-wt AML and normal CD34+ myeloid cells were unaffected. In good agreement, in a cohort of 100 samples from AML patients with intermediate-risk cytogenetics, high levels of CDC25A mRNA were predictive of higher clonogenic potential in FLT3-ITD+ samples, not in FLT3-wt ones.Importantly, pharmacological inhibition as well as RNA interference-mediated knock-down of CDC25A also induced monocytic differentiation of FLT3-ITD positive cells, as judged by cell surface markers expression, morphological modifications, and C/EBPα phosphorylation. CDC25 inhibition also re-induced monocytic differentiation in primary AML blasts carrying the FLT3-ITD mutation, but not in blasts expressing wild type FLT3. Altogether, these data identify CDC25A as an early cell cycle transducer of FLT3-ITD oncogenic signaling, and as a promising target to inhibit proliferation and re-induce differentiation of FLT3-ITD AML cells.
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Affiliation(s)
- Sarah Bertoli
- Cancer Research Center of Toulouse, Inserm UMR 1037, CNRS ERL 5294, Université de Toulouse, Oncopole, Toulouse, France.,Hematology Department, Institut Universitaire du Cancer Toulouse - Oncopole, Toulouse, France
| | - Helena Boutzen
- Cancer Research Center of Toulouse, Inserm UMR 1037, CNRS ERL 5294, Université de Toulouse, Oncopole, Toulouse, France
| | - Laure David
- Cancer Research Center of Toulouse, Inserm UMR 1037, CNRS ERL 5294, Université de Toulouse, Oncopole, Toulouse, France
| | - Clément Larrue
- Cancer Research Center of Toulouse, Inserm UMR 1037, CNRS ERL 5294, Université de Toulouse, Oncopole, Toulouse, France.,Institut Cochin, Université Paris Descartes, CNRS UMR 8104, INSERM U 1016, Paris, France
| | - François Vergez
- Cancer Research Center of Toulouse, Inserm UMR 1037, CNRS ERL 5294, Université de Toulouse, Oncopole, Toulouse, France.,Hematology Laboratory, Institut Universitaire du Cancer Toulouse - Oncopole, Toulouse, France
| | - Anne Fernandez-Vidal
- Cancer Research Center of Toulouse, Inserm UMR 1037, CNRS ERL 5294, Université de Toulouse, Oncopole, Toulouse, France
| | - Lingli Yuan
- Cancer Research Center of Toulouse, Inserm UMR 1037, CNRS ERL 5294, Université de Toulouse, Oncopole, Toulouse, France
| | - Marie-Anne Hospital
- Institut Cochin, Université Paris Descartes, CNRS UMR 8104, INSERM U 1016, Paris, France
| | - Jérôme Tamburini
- Institut Cochin, Université Paris Descartes, CNRS UMR 8104, INSERM U 1016, Paris, France
| | - Cécile Demur
- Hematology Laboratory, Institut Universitaire du Cancer Toulouse - Oncopole, Toulouse, France
| | - Eric Delabesse
- Cancer Research Center of Toulouse, Inserm UMR 1037, CNRS ERL 5294, Université de Toulouse, Oncopole, Toulouse, France.,Hematology Laboratory, Institut Universitaire du Cancer Toulouse - Oncopole, Toulouse, France
| | - Estelle Saland
- Cancer Research Center of Toulouse, Inserm UMR 1037, CNRS ERL 5294, Université de Toulouse, Oncopole, Toulouse, France
| | - Jean-Emmanuel Sarry
- Cancer Research Center of Toulouse, Inserm UMR 1037, CNRS ERL 5294, Université de Toulouse, Oncopole, Toulouse, France
| | | | - Véronique Mansat-De Mas
- Cancer Research Center of Toulouse, Inserm UMR 1037, CNRS ERL 5294, Université de Toulouse, Oncopole, Toulouse, France.,Hematology Laboratory, Institut Universitaire du Cancer Toulouse - Oncopole, Toulouse, France
| | - Christine Didier
- Cancer Research Center of Toulouse, Inserm UMR 1037, CNRS ERL 5294, Université de Toulouse, Oncopole, Toulouse, France
| | - Christine Dozier
- Cancer Research Center of Toulouse, Inserm UMR 1037, CNRS ERL 5294, Université de Toulouse, Oncopole, Toulouse, France
| | - Christian Récher
- Cancer Research Center of Toulouse, Inserm UMR 1037, CNRS ERL 5294, Université de Toulouse, Oncopole, Toulouse, France.,Hematology Department, Institut Universitaire du Cancer Toulouse - Oncopole, Toulouse, France
| | - Stéphane Manenti
- Cancer Research Center of Toulouse, Inserm UMR 1037, CNRS ERL 5294, Université de Toulouse, Oncopole, Toulouse, France
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Alachkar H, Mutonga M, Malnassy G, Park JH, Fulton N, Woods A, Meng L, Kline J, Raca G, Odenike O, Takamatsu N, Miyamoto T, Matsuo Y, Stock W, Nakamura Y. T-LAK cell-originated protein kinase presents a novel therapeutic target in FLT3-ITD mutated acute myeloid leukemia. Oncotarget 2016; 6:33410-25. [PMID: 26450903 PMCID: PMC4741775 DOI: 10.18632/oncotarget.5418] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2015] [Accepted: 09/22/2015] [Indexed: 11/25/2022] Open
Abstract
Gain-of-function mutations of FLT3 (FLT3-ITD), comprises up to 30% of normal karyotype acute myeloid leukemia (AML) and is associated with an adverse prognosis. Current FLT3 kinase inhibitors have been tested extensively, but have not yet resulted in a survival benefit and novel therapies are awaited. Here we show that T-LAK cell-originated protein kinase (TOPK), a mitotic kinase highly expressed in and correlated with more aggressive phenotype in several types of cancer, is expressed in AML but not in normal CD34+ cells and that TOPK knockdown decreased cell viability and induced apoptosis. Treatment of AML cells with TOPK inhibitor (OTS514) resulted in a dose-dependent decrease in cell viability with lower IC50 in FLT3-mutated cells, including blasts obtained from patients relapsed after FLT3-inhibitor treatment. Using a MV4-11-engrafted mouse model, we found that mice treated with 7.5 mg/kg IV daily for 3 weeks survived significantly longer than vehicle treated mice (median survival 46 vs 29 days, P < 0.001). Importantly, we identified TOPK as a FLT3-ITD and CEBPA regulated kinase, and that modulating TOPK expression or activity resulted in significant decrease of FLT3 expression and CEBPA phosphorylation. Thus, targeting TOPK in FLT3-ITD AML represents a novel therapeutic approach for this adverse risk subset of AML.
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Affiliation(s)
- Houda Alachkar
- Department of Medicine, Section of Hematology/Oncology, University of Chicago, Chicago, IL, USA
| | - Martin Mutonga
- Department of Medicine, Section of Hematology/Oncology, University of Chicago, Chicago, IL, USA
| | - Gregory Malnassy
- Department of Medicine, Section of Hematology/Oncology, University of Chicago, Chicago, IL, USA
| | - Jae-Hyun Park
- Department of Medicine, Section of Hematology/Oncology, University of Chicago, Chicago, IL, USA
| | - Noreen Fulton
- Department of Medicine, Section of Hematology/Oncology, University of Chicago, Chicago, IL, USA
| | - Alex Woods
- Department of Medicine, Section of Hematology/Oncology, University of Chicago, Chicago, IL, USA
| | - Liping Meng
- Department of Medicine, Section of Hematology/Oncology, University of Chicago, Chicago, IL, USA
| | - Justin Kline
- Department of Medicine, Section of Hematology/Oncology, University of Chicago, Chicago, IL, USA
| | - Gordana Raca
- Department of Medicine, Section of Hematology/Oncology, University of Chicago, Chicago, IL, USA
| | - Olatoyosi Odenike
- Department of Medicine, Section of Hematology/Oncology, University of Chicago, Chicago, IL, USA
| | | | | | - Yo Matsuo
- OncoTherapy Science, Inc., Kanagawa, Japan
| | - Wendy Stock
- Department of Medicine, Section of Hematology/Oncology, University of Chicago, Chicago, IL, USA
| | - Yusuke Nakamura
- Department of Medicine, Section of Hematology/Oncology, University of Chicago, Chicago, IL, USA
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33
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Acetylation of C/EBPα inhibits its granulopoietic function. Nat Commun 2016; 7:10968. [PMID: 27005833 PMCID: PMC4814574 DOI: 10.1038/ncomms10968] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2015] [Accepted: 02/07/2016] [Indexed: 01/01/2023] Open
Abstract
CCAAT/enhancer-binding protein alpha (C/EBPα) is an essential transcription factor for myeloid lineage commitment. Here we demonstrate that acetylation of C/EBPα at lysine residues K298 and K302, mediated at least in part by general control non-derepressible 5 (GCN5), impairs C/EBPα DNA-binding ability and modulates C/EBPα transcriptional activity. Acetylated C/EBPα is enriched in human myeloid leukaemia cell lines and acute myeloid leukaemia (AML) samples, and downregulated upon granulocyte-colony stimulating factor (G-CSF)- mediated granulocytic differentiation of 32Dcl3 cells. C/EBPα mutants that mimic acetylation failed to induce granulocytic differentiation in C/EBPα-dependent assays, in both cell lines and in primary hematopoietic cells. Our data uncover GCN5 as a negative regulator of C/EBPα and demonstrate the importance of C/EBPα acetylation in myeloid differentiation. C/EBPα is an essential transcription factor for myeloid lineage commitment. Here, the authors show that acetylation of C/EBPα at K298 and K302, mediated at least in part by GCN5, impairs C/EBPα DNA binding ability and modulates C/EBPα transcriptional activity.
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34
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Radomska HS, Jernigan F, Nakayama S, Jorge SE, Sun L, Tenen DG, Kobayashi SS. A Cell-Based High-Throughput Screening for Inducers of Myeloid Differentiation. ACTA ACUST UNITED AC 2015; 20:1150-9. [PMID: 26109609 DOI: 10.1177/1087057115592220] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2014] [Accepted: 05/29/2015] [Indexed: 12/27/2022]
Abstract
Recent progress of genetic studies has dramatically unveiled pathogenesis of acute myeloid leukemia (AML). However, overall survival of AML still remains unsatisfactory, and development of novel therapeutics is required. CCAAT/enhancer binding protein α (C/EBPα) is one of the crucial transcription factors that induce granulocytic differentiation, and its activity is perturbed in human myeloid leukemias. As its reexpression can induce differentiation and subsequent apoptosis of leukemic cells in vitro, we hypothesized that chemical compounds that restore C/EBPα expression and/or activity would lead to myeloid differentiation of leukemic cells. Using a cell-based high-throughput screening, we identified 2-[(E)-2-(3,4-dihydroxyphenyl)vinyl]-3-(2-methoxyphenyl)-4(3H)-quinazolinone as a potent inducer of C/EBPα and myeloid differentiation. Leukemia cell lines and primary blast cells isolated from human patients with AML treated with ICCB280 demonstrated evidence of morphological and functional differentiation, as well as massive apoptosis. We performed conformational analyses of the high-throughput screening hit compounds to postulate the spatial requirements for high potency. Our results warrant a development of novel differentiation therapies and significantly affect care of patients with AML with unfavorable prognosis in the near future.
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Affiliation(s)
- Hanna S Radomska
- Department of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA Comprehensive Cancer Center, The Ohio State University Medical Center, Columbus, OH, USA
| | - Finith Jernigan
- Department of Surgery, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA
| | - Sohei Nakayama
- Department of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA
| | - Susan E Jorge
- Department of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA
| | - Lijun Sun
- Department of Surgery, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA
| | - Daniel G Tenen
- Harvard Stem Cell Institute, Harvard Medical School, Boston, MA, USA Cancer Science Institute, National University of Singapore, Singapore
| | - Susumu S Kobayashi
- Department of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA Harvard Stem Cell Institute, Harvard Medical School, Boston, MA, USA
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35
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Aleem E, Arceci RJ. Targeting cell cycle regulators in hematologic malignancies. Front Cell Dev Biol 2015; 3:16. [PMID: 25914884 PMCID: PMC4390903 DOI: 10.3389/fcell.2015.00016] [Citation(s) in RCA: 82] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2014] [Accepted: 02/25/2015] [Indexed: 12/20/2022] Open
Abstract
Hematologic malignancies represent the fourth most frequently diagnosed cancer in economically developed countries. In hematologic malignancies normal hematopoiesis is interrupted by uncontrolled growth of a genetically altered stem or progenitor cell (HSPC) that maintains its ability of self-renewal. Cyclin-dependent kinases (CDKs) not only regulate the mammalian cell cycle, but also influence other vital cellular processes, such as stem cell renewal, differentiation, transcription, epigenetic regulation, apoptosis, and DNA repair. Chromosomal translocations, amplification, overexpression and altered CDK activities have been described in different types of human cancer, which have made them attractive targets for pharmacological inhibition. Mouse models deficient for one or more CDKs have significantly contributed to our current understanding of the physiological functions of CDKs, as well as their roles in human cancer. The present review focuses on selected cell cycle kinases with recent emerging key functions in hematopoiesis and in hematopoietic malignancies, such as CDK6 and its role in MLL-rearranged leukemia and acute lymphocytic leukemia, CDK1 and its regulator WEE-1 in acute myeloid leukemia (AML), and cyclin C/CDK8/CDK19 complexes in T-cell acute lymphocytic leukemia. The knowledge gained from gene knockout experiments in mice of these kinases is also summarized. An overview of compounds targeting these kinases, which are currently in clinical development in various solid tumors and hematopoietic malignances, is presented. These include the CDK4/CDK6 inhibitors (palbociclib, LEE011, LY2835219), pan-CDK inhibitors that target CDK1 (dinaciclib, flavopiridol, AT7519, TG02, P276-00, terampeprocol and RGB 286638) as well as the WEE-1 kinase inhibitor, MK-1775. The advantage of combination therapy of cell cycle inhibitors with conventional chemotherapeutic agents used in the treatment of AML, such as cytarabine, is discussed.
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Affiliation(s)
- Eiman Aleem
- Department of Child Health, The Ronald A. Matricaria Institute of Molecular Medicine at Phoenix Children's Hospital, University of Arizona College of Medicine-Phoenix Phoenix, AZ, USA ; Department of Zoology, Faculty of Science, Alexandria University Alexandria, Egypt
| | - Robert J Arceci
- Department of Child Health, The Ronald A. Matricaria Institute of Molecular Medicine at Phoenix Children's Hospital, University of Arizona College of Medicine-Phoenix Phoenix, AZ, USA
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36
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Cao L, Zhou J, Zhang J, Wu S, Yang X, Zhao X, Li H, Luo M, Yu Q, Lin G, Lin H, Xie J, Li P, Hu X, Zheng C, Bu G, Zhang YW, Xu H, Yang Y, Huang C, Zhang J. Cyclin-dependent kinase 5 decreases in gastric cancer and its nuclear accumulation suppresses gastric tumorigenesis. Clin Cancer Res 2015; 21:1419-28. [PMID: 25609066 DOI: 10.1158/1078-0432.ccr-14-1950] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
PURPOSE As a cyclin-independent atypical CDK, the role of CDK5 in regulating cell proliferation in gastric cancer remains unknown. EXPERIMENTAL DESIGN Expression of CDK5 in gastric tumor and paired adjacent noncancerous tissues from 437 patients was measured by Western blotting, immunohistochemistry, and real-time PCR. The subcellular translocation of CDK5 was monitored during gastric cancer cell proliferation. The role of nuclear CDK5 in gastric cancer tumorigenic proliferation and ex vivo xenografts was explored. Furthermore, by screening for compounds in the PubChem database that disrupt CDK5 association with its nuclear export facilitator, we identified a small molecular (NS-0011) that inhibits gastric cancer cell growth. RESULTS CDK5 level was significantly decreased in the majority of gastric tumor tissues, and the reduction of CDK5 correlated with the severity of gastric cancer based on tumor and lymph node metastasis and patient 5-year fatality rate. Nuclear localization of CDK5 was found to be significantly decreased in tumor tissues and gastric cancer cell lines, whereas exogenously expression of nucleus-targeted CDK5 inhibited the proliferation and xenograft implantation of gastric cancer cells. Treatment with the small molecule NS-0011, which increases CDK5 accumulation in the nucleus, suppressed both cancer cell proliferation and xenograft tumorigenesis. CONCLUSIONS Our results suggest that low CDK5 expression is associated with poor overall survival in patients with gastric cancer, and nuclear accumulation of CDK5 inhibits the proliferation and tumorigenicity of human gastric cancer cells.
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Affiliation(s)
- Longlong Cao
- Department of Gastric Surgery, Fujian Medical University Union Hospital, Fuzhou, Fujian, China. Fujian Provincial Key Laboratory of Neurodegenerative Disease and Aging Research, Institute of Neuroscience, College of Medicine, Xiamen University, Xiamen, Fujian China
| | - Jiechao Zhou
- Fujian Provincial Key Laboratory of Neurodegenerative Disease and Aging Research, Institute of Neuroscience, College of Medicine, Xiamen University, Xiamen, Fujian China
| | - Junrong Zhang
- Department of Gastric Surgery, Fujian Medical University Union Hospital, Fuzhou, Fujian, China. Fujian Provincial Key Laboratory of Neurodegenerative Disease and Aging Research, Institute of Neuroscience, College of Medicine, Xiamen University, Xiamen, Fujian China
| | - Sijin Wu
- School of Life Science and Biotechnology, Dalian University of Technology, Dalian, Liaoning, China
| | - Xintao Yang
- Department of Gastric Surgery, Fujian Medical University Union Hospital, Fuzhou, Fujian, China. Fujian Provincial Key Laboratory of Neurodegenerative Disease and Aging Research, Institute of Neuroscience, College of Medicine, Xiamen University, Xiamen, Fujian China
| | - Xin Zhao
- Fujian Provincial Key Laboratory of Neurodegenerative Disease and Aging Research, Institute of Neuroscience, College of Medicine, Xiamen University, Xiamen, Fujian China
| | - Huifang Li
- Fujian Provincial Key Laboratory of Neurodegenerative Disease and Aging Research, Institute of Neuroscience, College of Medicine, Xiamen University, Xiamen, Fujian China
| | - Ming Luo
- Department of Gastric Surgery, Fujian Medical University Union Hospital, Fuzhou, Fujian, China
| | - Qian Yu
- Department of Gastric Surgery, Fujian Medical University Union Hospital, Fuzhou, Fujian, China
| | - Guangtan Lin
- Department of Gastric Surgery, Fujian Medical University Union Hospital, Fuzhou, Fujian, China
| | - Huizhong Lin
- Department of Gastric Surgery, Fujian Medical University Union Hospital, Fuzhou, Fujian, China
| | - Jianwei Xie
- Department of Gastric Surgery, Fujian Medical University Union Hospital, Fuzhou, Fujian, China
| | - Ping Li
- Department of Gastric Surgery, Fujian Medical University Union Hospital, Fuzhou, Fujian, China
| | - Xiaoqing Hu
- School of Life Science and Biotechnology, Dalian University of Technology, Dalian, Liaoning, China
| | - Chaohui Zheng
- Department of Gastric Surgery, Fujian Medical University Union Hospital, Fuzhou, Fujian, China
| | - Guojun Bu
- Fujian Provincial Key Laboratory of Neurodegenerative Disease and Aging Research, Institute of Neuroscience, College of Medicine, Xiamen University, Xiamen, Fujian China
| | - Yun-wu Zhang
- Fujian Provincial Key Laboratory of Neurodegenerative Disease and Aging Research, Institute of Neuroscience, College of Medicine, Xiamen University, Xiamen, Fujian China. Cancer Research Center, Xiamen University, Xiamen, Fujian, China
| | - Huaxi Xu
- Fujian Provincial Key Laboratory of Neurodegenerative Disease and Aging Research, Institute of Neuroscience, College of Medicine, Xiamen University, Xiamen, Fujian China. Cancer Research Center, Xiamen University, Xiamen, Fujian, China. Sanford-Burnham Medical Research Institute, La Jolla, California.
| | - Yongliang Yang
- School of Life Science and Biotechnology, Dalian University of Technology, Dalian, Liaoning, China.
| | - Changming Huang
- Department of Gastric Surgery, Fujian Medical University Union Hospital, Fuzhou, Fujian, China.
| | - Jie Zhang
- Fujian Provincial Key Laboratory of Neurodegenerative Disease and Aging Research, Institute of Neuroscience, College of Medicine, Xiamen University, Xiamen, Fujian China. Cancer Research Center, Xiamen University, Xiamen, Fujian, China.
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37
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Friedman AD. C/EBPα in normal and malignant myelopoiesis. Int J Hematol 2015; 101:330-41. [PMID: 25753223 DOI: 10.1007/s12185-015-1764-6] [Citation(s) in RCA: 76] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2015] [Revised: 02/18/2015] [Accepted: 02/19/2015] [Indexed: 12/22/2022]
Abstract
CCAAT/enhancer binding protein α (C/EBPα) dimerizes via its leucine zipper (LZ) domain to bind DNA via its basic region and activate transcription via N-terminal trans-activation domains. The activity of C/EBPα is modulated by several serine/threonine kinases and via sumoylation, its gene is activated by RUNX1 and additional transcription factors, its mRNA stability is modified by miRNAs, and its mRNA is subject to translation control that affects AUG selection. In addition to inducing differentiation, C/EBPα inhibits cell cycle progression and apoptosis. Within hematopoiesis, C/EBPα levels increase as long-term stem cells progress to granulocyte-monocyte progenitors (GMP). Absence of C/EBPα prevents GMP formation, and higher levels are required for granulopoiesis compared to monopoiesis. C/EBPα interacts with AP-1 proteins to bind hybrid DNA elements during monopoiesis, and induction of Gfi-1, C/EBPε, KLF5, and miR-223 by C/EBPα enables granulopoiesis. The CEBPA ORF is mutated in approximately 10 % of acute myeloid leukemias (AML), leading to expression of N-terminally truncated C/EBPαp30 and C-terminal, in-frame C/EBPαLZ variants, which inhibit C/EBPα activities but also play additional roles during myeloid transformation. RUNX1 mutation, CEBPA promoter methylation, Trib1 or Trib2-mediated C/EBPαp42 degradation, and signaling pathways leading to C/EBPα serine 21 phosphorylation reduce C/EBPα expression or activity in additional AML cases.
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Affiliation(s)
- Alan D Friedman
- Division of Pediatric Oncology, Johns Hopkins University, Cancer Research Building I, Room 253, 1650 Orleans Street, Baltimore, MD, 21231, USA,
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38
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Brenner AK, Reikvam H, Lavecchia A, Bruserud Ø. Therapeutic targeting the cell division cycle 25 (CDC25) phosphatases in human acute myeloid leukemia--the possibility to target several kinases through inhibition of the various CDC25 isoforms. Molecules 2014; 19:18414-47. [PMID: 25397735 PMCID: PMC6270710 DOI: 10.3390/molecules191118414] [Citation(s) in RCA: 63] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2014] [Revised: 10/28/2014] [Accepted: 11/02/2014] [Indexed: 01/26/2023] Open
Abstract
The cell division cycle 25 (CDC25) phosphatases include CDC25A, CDC25B and CDC25C. These three molecules are important regulators of several steps in the cell cycle, including the activation of various cyclin-dependent kinases (CDKs). CDC25s seem to have a role in the development of several human malignancies, including acute myeloid leukemia (AML); and CDC25 inhibition is therefore considered as a possible anticancer strategy. Firstly, upregulation of CDC25A can enhance cell proliferation and the expression seems to be controlled through PI3K-Akt-mTOR signaling, a pathway possibly mediating chemoresistance in human AML. Loss of CDC25A is also important for the cell cycle arrest caused by differentiation induction of malignant hematopoietic cells. Secondly, high CDC25B expression is associated with resistance against the antiproliferative effect of PI3K-Akt-mTOR inhibitors in primary human AML cells, and inhibition of this isoform seems to reduce AML cell line proliferation through effects on NFκB and p300. Finally, CDC25C seems important for the phenotype of AML cells at least for a subset of patients. Many of the identified CDC25 inhibitors show cross-reactivity among the three CDC25 isoforms. Thus, by using such cross-reactive inhibitors it may become possible to inhibit several molecular events in the regulation of cell cycle progression and even cytoplasmic signaling, including activation of several CDKs, through the use of a single drug. Such combined strategies will probably be an advantage in human cancer treatment.
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Affiliation(s)
- Annette K Brenner
- Section for Hematology, Institute of Clinical Science, Faculty of Medicine and Dentistry, University of Bergen, Bergen, 5021, Norway
| | - Håkon Reikvam
- Section for Hematology, Institute of Clinical Science, Faculty of Medicine and Dentistry, University of Bergen, Bergen, 5021, Norway
| | - Antonio Lavecchia
- "Drug Discovery" Laboratory, Department of Pharmacy, University of Naples Federico II, Naples 80131, Italy
| | - Øystein Bruserud
- Section for Hematology, Institute of Clinical Science, Faculty of Medicine and Dentistry, University of Bergen, Bergen, 5021, Norway.
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Shi Z, An N, Lu BM, Zhou N, Yang SL, Zhang B, Li CY, Wang ZJ, Wang F, Wu CF, Bao JK. Identification of novel kinase inhibitors by targeting a kinase-related apoptotic protein-protein interaction network in HeLa cells. Cell Prolif 2014; 47:219-30. [PMID: 24645986 PMCID: PMC6496802 DOI: 10.1111/cpr.12098] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2013] [Accepted: 12/28/2013] [Indexed: 12/15/2022] Open
Abstract
OBJECTIVES Protein kinases orchestrate activation of signalling cascades in response to extra- and intracellular stimuli for regulation of cell proliferation. They are directly involved in a variety of diseases, particularly cancers. Systems biology approaches have become increasingly important in understanding regulatory frameworks in cancer, and thus may facilitate future anti-cancer discoveries. Moreover, it has been suggested and confirmed that high-throughput virtual screening provides a novel, effective way to reveal small molecule protein kinase inhibitors. Accordingly, we aimed to identify kinase targets and novel kinase inhibitors. MATERIALS AND METHODS A series of bioinformatics methods, such as network construction, molecular docking and microarray analyses were performed. RESULTS In this study, we computationally constructed the appropriate global human protein-protein interaction network with data from online databases, and then modified it into a kinase-related apoptotic protein-protein interaction network. Subsequently, we identified several kinases as potential drug targets according to their differential expression observed by microarray analyses. Then, we predicted relevant microRNAs, which could target the above-mentioned kinases. Ultimately, we virtually screened a number of small molecule natural products from Traditional Chinese Medicine (TCM)@Taiwan database and identified a number of compounds that are able to target polo-like kinase 1, cyclin-dependent kinase 1 and cyclin-dependent kinase 2 in HeLa cervical carcinoma cells. CONCLUSIONS Taken together, all these findings might hopefully facilitate discovery of new kinase inhibitors that could be promising candidates for anti-cancer drug development.
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Affiliation(s)
- Z. Shi
- School of Life Sciences & Key Laboratory of Bio‐resourcesMinistry of EducationSichuan UniversityChengdu610064China
- School of Life SciencesGuizhou Normal UniversityGuiyang550001China
| | - N. An
- School of Life Sciences & Key Laboratory of Bio‐resourcesMinistry of EducationSichuan UniversityChengdu610064China
| | - B. M. Lu
- School of Life Sciences & Key Laboratory of Bio‐resourcesMinistry of EducationSichuan UniversityChengdu610064China
| | - N. Zhou
- School of Life Sciences & Key Laboratory of Bio‐resourcesMinistry of EducationSichuan UniversityChengdu610064China
| | - S. L. Yang
- School of Life SciencesGuizhou Normal UniversityGuiyang550001China
| | - B. Zhang
- School of Life Sciences & Key Laboratory of Bio‐resourcesMinistry of EducationSichuan UniversityChengdu610064China
| | - C. Y. Li
- School of Life Sciences & Key Laboratory of Bio‐resourcesMinistry of EducationSichuan UniversityChengdu610064China
| | - Z. J. Wang
- School of Life Sciences & Key Laboratory of Bio‐resourcesMinistry of EducationSichuan UniversityChengdu610064China
| | - F. Wang
- China National Biotec Group Company LimitedBeijing100029China
| | - C. F. Wu
- School of Life Sciences & Key Laboratory of Bio‐resourcesMinistry of EducationSichuan UniversityChengdu610064China
| | - J. K. Bao
- School of Life Sciences & Key Laboratory of Bio‐resourcesMinistry of EducationSichuan UniversityChengdu610064China
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40
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Lalic H, Dembitz V, Lukinovic-Skudar V, Banfic H, Visnjic D. 5-Aminoimidazole-4-carboxamide ribonucleoside induces differentiation of acute myeloid leukemia cells. Leuk Lymphoma 2014; 55:2375-83. [PMID: 24359245 DOI: 10.3109/10428194.2013.876633] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Adenosine monophosphate (AMP)-activated kinase (AMPK) modulators have been shown to exert cytotoxic activity in hematological malignancies, but their role in the differentiation of acute myeloid leukemia (AML) is less explored. In this study, the effects of AMPK agonists on all-trans retinoic acid (ATRA)-mediated differentiation of acute promyelocytic leukemia (APL) and non-APL AML cell lines were investigated. The results show that AMPK agonists inhibit the growth of myeloblastic HL-60, promyelocytic NB4 and monocytic U937 cells. 5-Aminoimidazole-4-carboxamide ribonucleoside (AICAR), an AMPK activator, enhances ATRA-mediated differentiation of NB4 cells. In U937 cells, AICAR alone induces the expression of cell surface markers associated with mature monocytes and macrophages. In both cell lines, AICAR increases the activity of mitogen-activated protein kinase (MAPK), and the presence of a MAPK inhibitor reduces the expression of differentiation markers. These results reveal beneficial effects of AICAR in AML, including differentiation of non-APL AML cells.
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Affiliation(s)
- Hrvoje Lalic
- Department of Physiology and Croatian Institute for Brain Research, School of Medicine, University of Zagreb , Croatia
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41
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Genis L, Dávila D, Fernandez S, Pozo-Rodrigálvarez A, Martínez-Murillo R, Torres-Aleman I. Astrocytes require insulin-like growth factor I to protect neurons against oxidative injury. F1000Res 2014; 3:28. [PMID: 24715976 PMCID: PMC3954172 DOI: 10.12688/f1000research.3-28.v2] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 04/11/2014] [Indexed: 01/24/2023] Open
Abstract
Oxidative stress is a proposed mechanism in brain aging, making the study of its regulatory processes an important aspect of current neurobiological research. In this regard, the role of the aging regulator insulin-like growth factor I (IGF-I) in brain responses to oxidative stress remains elusive as both beneficial and detrimental actions have been ascribed to this growth factor. Because astrocytes protect neurons against oxidative injury, we explored whether IGF-I participates in astrocyte neuroprotection and found that blockade of the IGF-I receptor in astrocytes abrogated their rescuing effect on neurons. We found that IGF-I directly protects astrocytes against oxidative stress (H 2O 2). Indeed, in astrocytes but not in neurons, IGF-I decreases the pro-oxidant protein thioredoxin-interacting protein 1 and normalizes the levels of reactive oxygen species. Furthermore, IGF-I cooperates with trophic signals produced by astrocytes in response to H 2O 2 such as stem cell factor (SCF) to protect neurons against oxidative insult. After stroke, a condition associated with brain aging where oxidative injury affects peri-infarcted regions, a simultaneous increase in SCF and IGF-I expression was found in the cortex, suggesting that a similar cooperative response takes place in vivo. Cell-specific modulation by IGF-I of brain responses to oxidative stress may contribute in clarifying the role of IGF-I in brain aging.
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Affiliation(s)
- Laura Genis
- Instituto Cajal CSIC, 28002, Madrid, Spain ; CIBERNED, 28002, Madrid, Spain
| | - David Dávila
- Instituto Cajal CSIC, 28002, Madrid, Spain ; CIBERNED, 28002, Madrid, Spain
| | - Silvia Fernandez
- Instituto Cajal CSIC, 28002, Madrid, Spain ; CIBERNED, 28002, Madrid, Spain
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Nguyen TK, Grant S. Dinaciclib (SCH727965) inhibits the unfolded protein response through a CDK1- and 5-dependent mechanism. Mol Cancer Ther 2013; 13:662-74. [PMID: 24362465 DOI: 10.1158/1535-7163.mct-13-0714] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Evidence implicating dysregulation of the IRE1/XBP-1s arm of the unfolded protein response (UPR) in cancer pathogenesis (e.g., multiple myeloma) has prompted the development of IRE1 RNase inhibitors. Here, effects of cyclin-dependent kinase (CDK) inhibitor SCH727965 (dinaciclib) on the IRE1 arm of the UPR were examined in human leukemia and myeloma cells. Exposure of cells to extremely low (e.g., nmol/L) concentrations of SCH727965, a potent inhibitor of CDKs 1/2/5/9, diminished XBP-1s and Grp78 induction by the endoplasmic reticulum (ER) stress-inducers thapsigargin and tunicamycin, while sharply inducing cell death. SCH727965, in contrast to IRE1 RNase inhibitors, inhibited the UPR in association with attenuation of XBP-1s nuclear localization and accumulation rather than transcription, translation, or XBP-1 splicing. Notably, in human leukemia cells, CDK1 and 5 short hairpin RNA (shRNA) knockdown diminished Grp78 and XBP-1s upregulation while increasing thapsigargin lethality, arguing for a functional role for CDK1/5 in activation of the cytoprotective IRE1/XBP-1s arm of the UPR. In contrast, CDK9 or 2 inhibitors or shRNA knockdown failed to downregulate XBP-1s or Grp78. Furthermore, IRE1, XBP-1, or Grp78 knockdown significantly increased thapsigargin lethality, as observed with CDK1/5 inhibition/knockdown. Finally, SCH727965 diminished myeloma cell growth in vivo in association with XBP-1s downregulation. Together, these findings demonstrate that SCH727965 acts at extremely low concentrations to attenuate XBP-1s nuclear accumulation and Grp78 upregulation in response to ER stress inducers. They also highlight a link between specific components of the cell-cycle regulatory apparatus (e.g., CDK1/5) and the cytoprotective IRE1/XBP-1s/Grp78 arm of the UPR that may be exploited therapeutically in UPR-driven malignancies.
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Affiliation(s)
- Tri K Nguyen
- Corresponding Author: Steven Grant, Massey Cancer Center, Virginia Commonwealth University, Room 234, 401 College Street, P.O. Box 980035, Richmond, VA 23298-0035.
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The Impact of FLT3 Mutations on the Development of Acute Myeloid Leukemias. LEUKEMIA RESEARCH AND TREATMENT 2013; 2013:275760. [PMID: 23936658 PMCID: PMC3725705 DOI: 10.1155/2013/275760] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 02/01/2013] [Revised: 04/30/2013] [Accepted: 05/14/2013] [Indexed: 11/17/2022]
Abstract
The development of the genetic studies on acute myeloid leukemias (AMLs) has led to the identification of some recurrent genetic abnormalities. Their discovery was of fundamental importance not only for a better understanding of the molecular pathogenesis of AMLs, but also for the identification of new therapeutic targets. In this context, it is essential to identify AML-associated “driver” mutations, which have a causative role in leukemogenesis. Evidences accumulated during the last years indicate that activating internal tandem duplication mutations in FLT3 (FLT3-ITD), detected in about 20% of AMLs, represents driver mutations and valid therapeutic targets in AMLs. Furthermore, the screening of FLT3-ITD mutations has also considerably helped to improve the identification of more accurate prognostic criteria and of the therapeutic selection of patients.
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44
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Volpe G, Walton DS, Del Pozzo W, Garcia P, Dassé E, O’Neill LP, Griffiths M, Frampton J, Dumon S. C/EBPα and MYB regulate FLT3 expression in AML. Leukemia 2013; 27:1487-96. [PMID: 23340802 PMCID: PMC4214120 DOI: 10.1038/leu.2013.23] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2012] [Revised: 12/22/2012] [Accepted: 01/09/2013] [Indexed: 11/09/2022]
Abstract
The interaction between the receptor FLT3 (FMS-like tyrosine kinase-3) and its ligand FL leads to crucial signalling during the early stages of the commitment of haematopoietic stem cells. Mutation or over-expression of the FLT3 gene, leading to constitutive signalling, enhances the survival and expansion of a variety of leukaemias and is associated with an unfavourable clinical outcome for acute myeloid leukaemia (AML) patients. In this study, we used a murine cellular model for AML and primary leukaemic cells from AML patients to investigate the molecular mechanisms underlying the regulation of FLT3 gene expression and identify its key cis- and trans-regulators. By assessing DNA accessibility and epigenetic markings, we defined regulatory domains in the FLT3 promoter and first intron. These elements permit in vivo binding of several AML-related transcription factors, including the proto-oncogene MYB and the CCAAT/enhancer binding protein C/EBPα, which are recruited to the FLT3 promoter and intronic module, respectively. Substantiating their relevance to the human disease, our analysis of gene expression profiling arrays from AML patients uncovered significant correlations between FLT3 expression level and that of MYB and CEBPA. The latter relationship permits discrimination between patients with CEBPA mono- and bi-allelic mutations, and thus connects two major prognostic factors for AML.
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MESH Headings
- Animals
- Base Sequence
- CCAAT-Enhancer-Binding Proteins/genetics
- CCAAT-Enhancer-Binding Proteins/metabolism
- Cell Line, Tumor
- Disease Models, Animal
- Epigenesis, Genetic/physiology
- Gene Expression Regulation, Leukemic/physiology
- Genetic Complementation Test
- Homeodomain Proteins/genetics
- Humans
- Introns/genetics
- Leukemia, Myeloid, Acute/genetics
- Leukemia, Myeloid, Acute/metabolism
- Mice
- Molecular Sequence Data
- Myeloid Ecotropic Viral Integration Site 1 Protein
- Neoplasm Proteins/genetics
- Promoter Regions, Genetic/genetics
- Proto-Oncogene Mas
- Proto-Oncogene Proteins c-myb/genetics
- Proto-Oncogene Proteins c-myb/metabolism
- Tumor Cells, Cultured
- fms-Like Tyrosine Kinase 3/genetics
- fms-Like Tyrosine Kinase 3/metabolism
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Affiliation(s)
- G Volpe
- Institute of Biomedical Research, College of Medical and Dental Sciences, University of Birmingham, Birmingham, UK
| | - DS Walton
- Institute of Biomedical Research, College of Medical and Dental Sciences, University of Birmingham, Birmingham, UK
| | - W Del Pozzo
- Nikhef, Science Park, Amsterdam, XG, The Netherlands
| | - P Garcia
- Institute of Biomedical Research, College of Medical and Dental Sciences, University of Birmingham, Birmingham, UK
| | - E Dassé
- Institute of Biomedical Research, College of Medical and Dental Sciences, University of Birmingham, Birmingham, UK
| | - LP O’Neill
- Institute of Biomedical Research, College of Medical and Dental Sciences, University of Birmingham, Birmingham, UK
| | - M Griffiths
- West Midlands Regional Genetics Laboratory, Birmingham Women’s NHS Foundation Trust, Birmingham, UK
| | - J Frampton
- Institute of Biomedical Research, College of Medical and Dental Sciences, University of Birmingham, Birmingham, UK
| | - S Dumon
- Institute of Biomedical Research, College of Medical and Dental Sciences, University of Birmingham, Birmingham, UK
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Bose P, Simmons GL, Grant S. Cyclin-dependent kinase inhibitor therapy for hematologic malignancies. Expert Opin Investig Drugs 2013; 22:723-38. [PMID: 23647051 PMCID: PMC4039040 DOI: 10.1517/13543784.2013.789859] [Citation(s) in RCA: 116] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
INTRODUCTION Cyclin-dependent kinases (CDKs) regulate cell cycle progression. Certain CDKs (e.g., CDK7, CDK9) also control cellular transcription. Consequently, CDKs represent attractive targets for anticancer drug development, as their aberrant expression is common in diverse malignancies, and CDK inhibition can trigger apoptosis. CDK inhibition may be particularly successful in hematologic malignancies, which are more sensitive to inhibition of cell cycling and apoptosis induction. AREAS COVERED A number of CDK inhibitors, ranging from pan-CDK inhibitors such as flavopiridol (alvocidib) to highly selective inhibitors of specific CDKs (e.g., CDK4/6), such as PD0332991, that are currently in various phases of development, are profiled in this review. Flavopiridol induces cell cycle arrest, and globally represses transcription via CDK9 inhibition. The latter may represent its major mechanism of action via down-regulation of multiple short-lived proteins. In early phase trials, flavopiridol has shown encouraging efficacy across a wide spectrum of hematologic malignancies. Early results with dinaciclib and PD0332991 also appear promising. EXPERT OPINION In general, the antitumor efficacy of CDK inhibitor monotherapy is modest, and rational combinations are being explored, including those involving other targeted agents. While selective CDK4/6 inhibition might be effective against certain malignancies, broad-spectrum CDK inhibition will likely be required for most cancers.
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Affiliation(s)
- Prithviraj Bose
- Virginia Commonwealth University, Internal Medicine, 1101 E Marshall
St, Sanger Hall, Richmond, VA 23298, USA
| | - Gary L Simmons
- Virginia Commonwealth University, Internal Medicine, 1101 E Marshall
St, Sanger Hall, Richmond, VA 23298, USA
| | - Steven Grant
- Virginia Commonwealth University, Internal Medicine, 1101 E Marshall
St, Sanger Hall, Richmond, VA 23298, USA
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Sands WA, Copland M, Wheadon H. Targeting self-renewal pathways in myeloid malignancies. Cell Commun Signal 2013; 11:33. [PMID: 23675967 PMCID: PMC3665484 DOI: 10.1186/1478-811x-11-33] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2013] [Accepted: 04/22/2013] [Indexed: 12/23/2022] Open
Abstract
A fundamental property of hematopoietic stem cells (HSCs) is the ability to self-renew. This is a complex process involving multiple signal transduction cascades which control the fine balance between self-renewal and differentiation through transcriptional networks. Key activators/regulators of self-renewal include chemokines, cytokines and morphogens which are expressed in the bone marrow niche, either in a paracrine or autocrine fashion, and modulate stem cell behaviour. Increasing evidence suggests that the downstream signaling pathways induced by these ligands converge at multiple levels providing a degree of redundancy in steady state hematopoiesis. Here we will focus on how these pathways cross-talk to regulate HSC self-renewal highlighting potential therapeutic windows which could be targeted to prevent leukemic stem cell self-renewal in myeloid malignancies.
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Affiliation(s)
- William A Sands
- Paul O’Gorman Leukaemia Research Centre, College of Medical, Veterinary and Life Sciences, University of Glasgow, Gartnavel General Hospital, 1053 Great Western Road, Glasgow G12 0ZD, UK
| | - Mhairi Copland
- Paul O’Gorman Leukaemia Research Centre, College of Medical, Veterinary and Life Sciences, University of Glasgow, Gartnavel General Hospital, 1053 Great Western Road, Glasgow G12 0ZD, UK
| | - Helen Wheadon
- Paul O’Gorman Leukaemia Research Centre, College of Medical, Veterinary and Life Sciences, University of Glasgow, Gartnavel General Hospital, 1053 Great Western Road, Glasgow G12 0ZD, UK
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Hedblom A, Laursen KB, Miftakhova R, Sarwar M, Anagnostaki L, Bredberg A, Mongan NP, Gudas LJ, Persson JL. CDK1 interacts with RARγ and plays an important role in treatment response of acute myeloid leukemia. Cell Cycle 2013; 12:1251-66. [PMID: 23518499 PMCID: PMC3674090 DOI: 10.4161/cc.24313] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2013] [Accepted: 03/14/2013] [Indexed: 11/19/2022] Open
Abstract
Alterations in cell cycle pathways and retinoic acid signaling are implicated in leukemogenesis. However, little is known about the roles of cyclin-dependent kinases (CDKs) in treatment response of leukemia. In this study, we observed that CDK1 expression was significantly higher in bone marrow from 42 patients with acute myeloid leukemia (AML) at recurrence than that at first diagnosis (p = 0.04). AML patients had higher level of nuclear CDK1 in their leukemic blasts tended to have poorer clinical outcome compared with those with lower levels. We showed that CDK1 function is required for all-trans retinoic acid (ATRA) to achieve the optimal effect in U-937 human leukemic cells. CDK1 modulates the levels of P27(kip) and AKT phosphorylation in response to ATRA treatment. Further, we show, for the first time, that RARγ in concert with ATRA regulates protein levels of CDK1 and its subcellular localization. The regulation of the subcellular content of CDK1 and RARγ by ATRA is an important process for achieving an effective response in treatment of leukemia. RARγ and CDK1 form a reciprocal regulatory circuit in the nucleus and influence the function and protein stability of each other and the level of P27(kip) protein. In addition, expression of wee1 kinase and Cdc25A/C phosphatases also coincide with CDK1 expression and its subcellular localization in response to ATRA treatment. Our study reveals a novel mechanism by which CDK1 and RARγ coordinate with ATRA to influence cell cycle progression and cellular differentiation.
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Affiliation(s)
- Andreas Hedblom
- Department of Laboratory Medicine; Division of Experimental Cancer Research; Clinical Research Center; Lund University; Malmö, Sweden
| | | | - Regina Miftakhova
- Department of Laboratory Medicine; Division of Experimental Cancer Research; Clinical Research Center; Lund University; Malmö, Sweden
| | - Martuza Sarwar
- Department of Laboratory Medicine; Division of Experimental Cancer Research; Clinical Research Center; Lund University; Malmö, Sweden
| | - Lola Anagnostaki
- Department of Pathology; Lund University; Skåne University Hospital; Malmö, Sweden
| | - Anders Bredberg
- Department of Clinical Microbiology; Lund University; Skåne University Hospital; Malmö, Sweden
| | - Nigel P. Mongan
- Faculty of Medicine and Health Sciences; School of Veterinary Medicine and Sciences; University of Nottingham; Leicestershire, UK
| | - Lorraine J. Gudas
- Department of Pharmacology; Weill Cornell Medical College; New York, NY USA
| | - Jenny L. Persson
- Department of Laboratory Medicine; Division of Experimental Cancer Research; Clinical Research Center; Lund University; Malmö, Sweden
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Doménech E, Malumbres M. Mitosis-targeting therapies: a troubleshooting guide. Curr Opin Pharmacol 2013; 13:519-28. [PMID: 23583638 DOI: 10.1016/j.coph.2013.03.011] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2013] [Revised: 03/23/2013] [Accepted: 03/25/2013] [Indexed: 12/22/2022]
Abstract
Several mitotic kinases and kinesins are currently considered as cancer targets based on their critical role during the cell division cycle and their significant level of expression in human tumors. Yet, their use is limited by the lack of selectivity against tumor cells, the low percentage of mitotic cells in many human tumors, and dose-limiting side-effects. As a consequence, initial clinical trials have shown limited responses. Despite these drawbacks, inhibiting mitosis is a promising strategy that deserves further development. Future advances will benefit from more specific inhibitors with better pharmacodynamic properties, a clear physiological characterization and cell-type-specific requirements of old and new mitotic targets, and rational strategies based on synthetic lethal interactions to improve selectivity against tumor cells.
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Affiliation(s)
- Elena Doménech
- Cell Division and Cancer Group, Spanish National Cancer Research Centre (CNIO), Madrid, Spain
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