1
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Blumel L, Bernardi F, Picard D, Diaz JT, Jepsen VH, Hasselmann R, Schliehe-Diecks J, Bartl J, Qin N, Bornhauser B, Bhatia S, Marovka B, Marsaud V, Dingli F, Loew D, Stanulla M, Bourqin JP, Borkhardt A, Remke M, Ayrault O, Fischer U. Proteogenomic profiling uncovers differential therapeutic vulnerabilities between TCF3::PBX1 and TCF3::HLF translocated B-cell acute lymphoblastic leukemia. Haematologica 2024; 109:2290-2296. [PMID: 38426288 PMCID: PMC11215373 DOI: 10.3324/haematol.2023.283928] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2023] [Accepted: 02/15/2024] [Indexed: 03/02/2024] Open
Affiliation(s)
- Lena Blumel
- Department of Pediatric Oncology, Hematology and Clinical Immunology, Heinrich Heine University Dusseldorf, Medical Faculty, and University Hospital Dusseldorf, Dusseldorf, Germany; Division of Pediatric Neuro-Oncogenomics, German Cancer Research Center (DKFZ) and German Cancer Consortium (DKTK), partner site Essen/Dusseldorf, Dusseldorf
| | - Flavia Bernardi
- Institut Curie, CNRS UMR, INSERM, PSL Research University, Orsay, France; CNRS UMR 3347, INSERM U1021, Universite Paris Sud, Universite Paris-Saclay, Orsay
| | - Daniel Picard
- Department of Pediatric Oncology, Hematology and Clinical Immunology, Heinrich Heine University Dusseldorf, Medical Faculty, and University Hospital Dusseldorf, Dusseldorf, Germany; Division of Pediatric Neuro-Oncogenomics, German Cancer Research Center (DKFZ) and German Cancer Consortium (DKTK), partner site Essen/Dusseldorf, Dusseldorf
| | - Jacob Torrejon Diaz
- Institut Curie, CNRS UMR, INSERM, PSL Research University, Orsay, France; CNRS UMR 3347, INSERM U1021, Universite Paris Sud, Universite Paris-Saclay, Orsay
| | - Vera H Jepsen
- Department of Pediatric Oncology, Hematology and Clinical Immunology, Heinrich Heine University Dusseldorf, Medical Faculty, and University Hospital Dusseldorf, Dusseldorf, Germany; German Cancer Consortium (DKTK), partner site Essen/Dusseldorf, Dusseldorf
| | - Rebecca Hasselmann
- Department of Pediatric Oncology, Hematology and Clinical Immunology, Heinrich Heine University Dusseldorf, Medical Faculty, and University Hospital Dusseldorf, Dusseldorf, Germany; German Cancer Consortium (DKTK), partner site Essen/Dusseldorf, Dusseldorf
| | - Julian Schliehe-Diecks
- Department of Pediatric Oncology, Hematology and Clinical Immunology, Heinrich Heine University Dusseldorf, Medical Faculty, and University Hospital Dusseldorf, Dusseldorf, Germany; German Cancer Consortium (DKTK), partner site Essen/Dusseldorf, Dusseldorf
| | - Jasmin Bartl
- Department of Pediatric Oncology, Hematology and Clinical Immunology, Heinrich Heine University Dusseldorf, Medical Faculty, and University Hospital Dusseldorf, Dusseldorf, Germany; Division of Pediatric Neuro-Oncogenomics, German Cancer Research Center (DKFZ) and German Cancer Consortium (DKTK), partner site Essen/Dusseldorf, Dusseldorf, Germany; Group for Interdisciplinary Neurobiology and Immunology - INI-research, Institute of Zoology, University of Hamburg, Hamburg
| | - Nan Qin
- Department of Pediatric Oncology, Hematology and Clinical Immunology, Heinrich Heine University Dusseldorf, Medical Faculty, and University Hospital Dusseldorf, Dusseldorf, Germany; Division of Pediatric Neuro-Oncogenomics, German Cancer Research Center (DKFZ) and German Cancer Consortium (DKTK), partner site Essen/Dusseldorf, Dusseldorf
| | - Beat Bornhauser
- Department of Oncology and Children's Research Centre, University Children's Hospital Zurich, Zurich
| | - Sanil Bhatia
- Department of Pediatric Oncology, Hematology and Clinical Immunology, Heinrich Heine University Dusseldorf, Medical Faculty, and University Hospital Dusseldorf, Dusseldorf, Germany; German Cancer Consortium (DKTK), partner site Essen/Dusseldorf, Dusseldorf
| | - Blerim Marovka
- Department of Oncology and Children's Research Centre, University Children's Hospital Zurich, Zurich
| | - Veronique Marsaud
- Institut Curie, CNRS UMR, INSERM, PSL Research University, Orsay, France; CNRS UMR 3347, INSERM U1021, Universite Paris Sud, Universite Paris-Saclay, Orsay
| | - Florent Dingli
- Institut Curie, PSL Research University, Centre de Recherche, CurieCoreTech Spectrometrie de Masse Proteomique, Paris
| | - Damarys Loew
- Institut Curie, PSL Research University, Centre de Recherche, CurieCoreTech Spectrometrie de Masse Proteomique, Paris
| | - Martin Stanulla
- Department of Pediatric Hematology and Oncology, Hannover Medical School, Hannover
| | - Jean-Pierre Bourqin
- Department of Oncology and Children's Research Centre, University Children's Hospital Zurich, Zurich
| | - Arndt Borkhardt
- Department of Pediatric Oncology, Hematology and Clinical Immunology, Heinrich Heine University Dusseldorf, Medical Faculty, and University Hospital Dusseldorf, Dusseldorf, Germany; German Cancer Consortium (DKTK), partner site Essen/Dusseldorf, Dusseldorf
| | - Marc Remke
- Department of Pediatric Oncology, Hematology and Clinical Immunology, Heinrich Heine University Dusseldorf, Medical Faculty, and University Hospital Dusseldorf, Dusseldorf, Germany; Division of Pediatric Neuro-Oncogenomics, German Cancer Research Center (DKFZ) and German Cancer Consortium (DKTK), partner site Essen/Dusseldorf, Dusseldorf
| | - Olivier Ayrault
- Institut Curie, CNRS UMR, INSERM, PSL Research University, Orsay, France; CNRS UMR 3347, INSERM U1021, Universite Paris Sud, Universite Paris-Saclay, Orsay
| | - Ute Fischer
- Department of Pediatric Oncology, Hematology and Clinical Immunology, Heinrich Heine University Dusseldorf, Medical Faculty, and University Hospital Dusseldorf, Dusseldorf, Germany; German Cancer Consortium (DKTK), partner site Essen/Dusseldorf, Dusseldorf.
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2
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Pagliaro L, Chen SJ, Herranz D, Mecucci C, Harrison CJ, Mullighan CG, Zhang M, Chen Z, Boissel N, Winter SS, Roti G. Acute lymphoblastic leukaemia. Nat Rev Dis Primers 2024; 10:41. [PMID: 38871740 DOI: 10.1038/s41572-024-00525-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 05/01/2024] [Indexed: 06/15/2024]
Abstract
Acute lymphoblastic leukaemia (ALL) is a haematological malignancy characterized by the uncontrolled proliferation of immature lymphoid cells. Over past decades, significant progress has been made in understanding the biology of ALL, resulting in remarkable improvements in its diagnosis, treatment and monitoring. Since the advent of chemotherapy, ALL has been the platform to test for innovative approaches applicable to cancer in general. For example, the advent of omics medicine has led to a deeper understanding of the molecular and genetic features that underpin ALL. Innovations in genomic profiling techniques have identified specific genetic alterations and mutations that drive ALL, inspiring new therapies. Targeted agents, such as tyrosine kinase inhibitors and immunotherapies, have shown promising results in subgroups of patients while minimizing adverse effects. Furthermore, the development of chimeric antigen receptor T cell therapy represents a breakthrough in ALL treatment, resulting in remarkable responses and potential long-term remissions. Advances are not limited to treatment modalities alone. Measurable residual disease monitoring and ex vivo drug response profiling screening have provided earlier detection of disease relapse and identification of exceptional responders, enabling clinicians to adjust treatment strategies for individual patients. Decades of supportive and prophylactic care have improved the management of treatment-related complications, enhancing the quality of life for patients with ALL.
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Affiliation(s)
- Luca Pagliaro
- Department of Medicine and Surgery, University of Parma, Parma, Italy
- Translational Hematology and Chemogenomics (THEC), University of Parma, Parma, Italy
- Hematology and BMT Unit, Azienda Ospedaliero-Universitaria di Parma, Parma, Italy
| | - Sai-Juan Chen
- Shanghai Institute of Hematology, State Key Laboratory of Medical Genomics, National Research Center for Translational Medicine at Shanghai, Ruijin Hospital, Shanghai JiaoTong University School of Medicine, Shanghai, China
| | - Daniel Herranz
- Rutgers Cancer Institute of New Jersey, Rutgers Robert Wood Johnson Medical School, Rutgers University, New Brunswick, NJ, USA
| | - Cristina Mecucci
- Department of Medicine, Hematology and Clinical Immunology, University of Perugia, Perugia, Italy
| | - Christine J Harrison
- Leukaemia Research Cytogenetics Group, Translational and Clinical Research Institute, Newcastle University Centre for Cancer, Faculty of Medical Sciences, Newcastle University, Newcastle upon Tyne, UK
| | - Charles G Mullighan
- Department of Pathology, St. Jude Children's Research Hospital, Memphis, TN, USA
| | - Ming Zhang
- Shanghai Institute of Hematology, State Key Laboratory of Medical Genomics, National Research Center for Translational Medicine at Shanghai, Ruijin Hospital, Shanghai JiaoTong University School of Medicine, Shanghai, China
| | - Zhu Chen
- Shanghai Institute of Hematology, State Key Laboratory of Medical Genomics, National Research Center for Translational Medicine at Shanghai, Ruijin Hospital, Shanghai JiaoTong University School of Medicine, Shanghai, China
| | - Nicolas Boissel
- Hôpital Saint-Louis, APHP, Institut de Recherche Saint-Louis, Université Paris Cité, Paris, France
| | - Stuart S Winter
- Children's Minnesota Cancer and Blood Disorders Program, Minneapolis, MN, USA
| | - Giovanni Roti
- Department of Medicine and Surgery, University of Parma, Parma, Italy.
- Translational Hematology and Chemogenomics (THEC), University of Parma, Parma, Italy.
- Hematology and BMT Unit, Azienda Ospedaliero-Universitaria di Parma, Parma, Italy.
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3
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Pouliou M, Koutsi MA, Champezou L, Giannopoulou AI, Vatsellas G, Piperi C, Agelopoulos M. MYCN Amplifications and Metabolic Rewiring in Neuroblastoma. Cancers (Basel) 2023; 15:4803. [PMID: 37835497 PMCID: PMC10571721 DOI: 10.3390/cancers15194803] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Revised: 09/20/2023] [Accepted: 09/27/2023] [Indexed: 10/15/2023] Open
Abstract
Cancer is a disease caused by (epi)genomic and gene expression abnormalities and characterized by metabolic phenotypes that are substantially different from the normal phenotypes of the tissues of origin. Metabolic reprogramming is one of the key features of tumors, including those established in the human nervous system. In this work, we emphasize a well-known cancerous genomic alteration: the amplification of MYCN and its downstream effects in neuroblastoma phenotype evolution. Herein, we extend our previous computational biology investigations by conducting an integrative workflow applied to published genomics datasets and comprehensively assess the impact of MYCN amplification in the upregulation of metabolism-related transcription factor (TF)-encoding genes in neuroblastoma cells. The results obtained first emphasized overexpressed TFs, and subsequently those committed in metabolic cellular processes, as validated by gene ontology analyses (GOs) and literature curation. Several genes encoding for those TFs were investigated at the mechanistic and regulatory levels by conducting further omics-based computational biology assessments applied on published ChIP-seq datasets retrieved from MYCN-amplified- and MYCN-enforced-overexpression within in vivo systems of study. Hence, we approached the mechanistic interrelationship between amplified MYCN and overexpression of metabolism-related TFs in neuroblastoma and showed that many are direct targets of MYCN in an amplification-inducible fashion. These results illuminate how MYCN executes its regulatory underpinnings on metabolic processes in neuroblastoma.
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Affiliation(s)
- Marialena Pouliou
- Center of Basic Research, Biomedical Research Foundation, Academy of Athens, 4 Soranou Ephessiou St., 11527 Athens, Greece; (M.P.); (M.A.K.); (L.C.); (G.V.)
| | - Marianna A. Koutsi
- Center of Basic Research, Biomedical Research Foundation, Academy of Athens, 4 Soranou Ephessiou St., 11527 Athens, Greece; (M.P.); (M.A.K.); (L.C.); (G.V.)
| | - Lydia Champezou
- Center of Basic Research, Biomedical Research Foundation, Academy of Athens, 4 Soranou Ephessiou St., 11527 Athens, Greece; (M.P.); (M.A.K.); (L.C.); (G.V.)
| | - Angeliki-Ioanna Giannopoulou
- Department of Biological Chemistry, Medical School, National and Kapodistrian University of Athens, 75 M. Asias Street Bldg 16, 11527 Athens, Greece;
| | - Giannis Vatsellas
- Center of Basic Research, Biomedical Research Foundation, Academy of Athens, 4 Soranou Ephessiou St., 11527 Athens, Greece; (M.P.); (M.A.K.); (L.C.); (G.V.)
| | - Christina Piperi
- Department of Biological Chemistry, Medical School, National and Kapodistrian University of Athens, 75 M. Asias Street Bldg 16, 11527 Athens, Greece;
| | - Marios Agelopoulos
- Center of Basic Research, Biomedical Research Foundation, Academy of Athens, 4 Soranou Ephessiou St., 11527 Athens, Greece; (M.P.); (M.A.K.); (L.C.); (G.V.)
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4
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Crump NT, Smith AL, Godfrey L, Dopico-Fernandez AM, Denny N, Harman JR, Hamley JC, Jackson NE, Chahrour C, Riva S, Rice S, Kim J, Basrur V, Fermin D, Elenitoba-Johnson K, Roeder RG, Allis CD, Roberts I, Roy A, Geng H, Davies JOJ, Milne TA. MLL-AF4 cooperates with PAF1 and FACT to drive high-density enhancer interactions in leukemia. Nat Commun 2023; 14:5208. [PMID: 37626123 PMCID: PMC10457349 DOI: 10.1038/s41467-023-40981-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2022] [Accepted: 08/18/2023] [Indexed: 08/27/2023] Open
Abstract
Aberrant enhancer activation is a key mechanism driving oncogene expression in many cancers. While much is known about the regulation of larger chromosome domains in eukaryotes, the details of enhancer-promoter interactions remain poorly understood. Recent work suggests co-activators like BRD4 and Mediator have little impact on enhancer-promoter interactions. In leukemias controlled by the MLL-AF4 fusion protein, we use the ultra-high resolution technique Micro-Capture-C (MCC) to show that MLL-AF4 binding promotes broad, high-density regions of enhancer-promoter interactions at a subset of key targets. These enhancers are enriched for transcription elongation factors like PAF1C and FACT, and the loss of these factors abolishes enhancer-promoter contact. This work not only provides an additional model for how MLL-AF4 is able to drive high levels of transcription at key genes in leukemia but also suggests a more general model linking enhancer-promoter crosstalk and transcription elongation.
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Affiliation(s)
- Nicholas T Crump
- MRC Molecular Haematology Unit, MRC Weatherall Institute of Molecular Medicine, Radcliffe Department of Medicine, University of Oxford, Oxford, OX3 9DS, UK.
- Hugh and Josseline Langmuir Centre for Myeloma Research, Centre for Haematology, Department of Immunology and Inflammation, Imperial College London, London, W12 0NN, UK.
| | - Alastair L Smith
- MRC Molecular Haematology Unit, MRC Weatherall Institute of Molecular Medicine, Radcliffe Department of Medicine, University of Oxford, Oxford, OX3 9DS, UK
| | - Laura Godfrey
- MRC Molecular Haematology Unit, MRC Weatherall Institute of Molecular Medicine, Radcliffe Department of Medicine, University of Oxford, Oxford, OX3 9DS, UK
| | - Ana M Dopico-Fernandez
- MRC Molecular Haematology Unit, MRC Weatherall Institute of Molecular Medicine, Radcliffe Department of Medicine, University of Oxford, Oxford, OX3 9DS, UK
| | - Nicholas Denny
- MRC Molecular Haematology Unit, MRC Weatherall Institute of Molecular Medicine, Radcliffe Department of Medicine, University of Oxford, Oxford, OX3 9DS, UK
| | - Joe R Harman
- MRC Molecular Haematology Unit, MRC Weatherall Institute of Molecular Medicine, Radcliffe Department of Medicine, University of Oxford, Oxford, OX3 9DS, UK
| | - Joseph C Hamley
- MRC Molecular Haematology Unit, MRC Weatherall Institute of Molecular Medicine, Radcliffe Department of Medicine, University of Oxford, Oxford, OX3 9DS, UK
| | - Nicole E Jackson
- MRC Molecular Haematology Unit, MRC Weatherall Institute of Molecular Medicine, Radcliffe Department of Medicine, University of Oxford, Oxford, OX3 9DS, UK
| | - Catherine Chahrour
- MRC Molecular Haematology Unit, MRC Weatherall Institute of Molecular Medicine, Radcliffe Department of Medicine, University of Oxford, Oxford, OX3 9DS, UK
| | - Simone Riva
- MRC Molecular Haematology Unit, MRC Weatherall Institute of Molecular Medicine, Radcliffe Department of Medicine, University of Oxford, Oxford, OX3 9DS, UK
| | - Siobhan Rice
- MRC Molecular Haematology Unit, MRC Weatherall Institute of Molecular Medicine, Radcliffe Department of Medicine, University of Oxford, Oxford, OX3 9DS, UK
| | - Jaehoon Kim
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology, Daejeon, 34141, South Korea
| | - Venkatesha Basrur
- Department of Pathology, University of Michigan, Ann Arbor, Michigan, USA
| | - Damian Fermin
- Department of Pathology, University of Michigan, Ann Arbor, Michigan, USA
| | - Kojo Elenitoba-Johnson
- Department of Pathology and Laboratory Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Robert G Roeder
- Laboratory of Biochemistry and Molecular Biology, The Rockefeller University, New York, NY, 10065, USA
| | - C David Allis
- Laboratory of Chromatin Biology and Epigenetics, The Rockefeller University, New York, NY, 10065, USA
| | - Irene Roberts
- MRC Molecular Haematology Unit, MRC Weatherall Institute of Molecular Medicine, Radcliffe Department of Medicine, University of Oxford, Oxford, OX3 9DS, UK
- Department of Paediatrics, University of Oxford, Oxford, OX3 9DU, UK
| | - Anindita Roy
- MRC Molecular Haematology Unit, MRC Weatherall Institute of Molecular Medicine, Radcliffe Department of Medicine, University of Oxford, Oxford, OX3 9DS, UK
- Department of Paediatrics, University of Oxford, Oxford, OX3 9DU, UK
| | - Huimin Geng
- Department of Laboratory Medicine, University of California, San Francisco, San Francisco, California, USA
| | - James O J Davies
- MRC Molecular Haematology Unit, MRC Weatherall Institute of Molecular Medicine, Radcliffe Department of Medicine, University of Oxford, Oxford, OX3 9DS, UK
| | - Thomas A Milne
- MRC Molecular Haematology Unit, MRC Weatherall Institute of Molecular Medicine, Radcliffe Department of Medicine, University of Oxford, Oxford, OX3 9DS, UK.
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5
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Peng Y, Tao Y, Zhang Y, Wang J, Yang J, Wang Y. CD25: A potential tumor therapeutic target. Int J Cancer 2023; 152:1290-1303. [PMID: 36082452 DOI: 10.1002/ijc.34281] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2022] [Revised: 07/17/2022] [Accepted: 08/08/2022] [Indexed: 02/03/2023]
Abstract
CD25 is the alpha-chain of the heterotrimer IL-2 receptor. CD25 is expressed on the surface of both immune and non-immune cells with different frequencies. For cancers, CD25 is expressed at high levels in many types of hematological malignancies, but at low levels in most solid tumors. CD25 is also highly expressed in activated circulating immune cells and regulatory T cells (Tregs). Infiltration of Tregs in the tumor microenvironment can lead to an imbalanced ratio of effector T cells (Teffs) and Tregs, which is associated with the progression of cancers. A rescued Teff/Treg cell ratio indicates an efficient anti-tumor response to immunotherapy. CD25 as a potential target for the depletion of Tregs is critical in developing new immunotherapeutic strategies. Few articles have summarized the relationships between CD25 and tumors, or the recent progress of drugs targeting CD25. In this paper, we will discuss the structures of IL-2 and IL-2R, the biological function of CD25 and its important role in tumor therapy. In addition, the latest research on drugs targeting CD25 has been summarized, providing guidance for future drug development.
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Affiliation(s)
- Yujia Peng
- State Key Laboratory of Biotherapy, Targeted Tracer Research and Development Laboratory, Institute of Respiratory Health, Frontiers Science Center for Disease- related Molecular Network, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, Sichuan, China.,West China-California Research Center for Predictive Intervention Medicine, West China Hospital, Sichuan University, Chengdu, Sichuan, China.,Precision Medicine Key Laboratory of Sichuan Province & Precision Medicine Research Center, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Yiran Tao
- State Key Laboratory of Biotherapy, Targeted Tracer Research and Development Laboratory, Institute of Respiratory Health, Frontiers Science Center for Disease- related Molecular Network, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, Sichuan, China.,West China-California Research Center for Predictive Intervention Medicine, West China Hospital, Sichuan University, Chengdu, Sichuan, China.,Precision Medicine Key Laboratory of Sichuan Province & Precision Medicine Research Center, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Ya Zhang
- State Key Laboratory of Biotherapy, Targeted Tracer Research and Development Laboratory, Institute of Respiratory Health, Frontiers Science Center for Disease- related Molecular Network, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, Sichuan, China.,College of Life Sciences, Sichuan University, Chengdu, Sichuan, China
| | - Jiaxing Wang
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Tennessee Health Science Center, Memphis, Tennessee, USA
| | - Jinliang Yang
- State Key Laboratory of Biotherapy, Targeted Tracer Research and Development Laboratory, Institute of Respiratory Health, Frontiers Science Center for Disease- related Molecular Network, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Yuxi Wang
- State Key Laboratory of Biotherapy, Targeted Tracer Research and Development Laboratory, Institute of Respiratory Health, Frontiers Science Center for Disease- related Molecular Network, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, Sichuan, China.,Precision Medicine Key Laboratory of Sichuan Province & Precision Medicine Research Center, West China Hospital, Sichuan University, Chengdu, Sichuan, China
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6
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Caracciolo D, Mancuso A, Polerà N, Froio C, D'Aquino G, Riillo C, Tagliaferri P, Tassone P. The emerging scenario of immunotherapy for T-cell Acute Lymphoblastic Leukemia: advances, challenges and future perspectives. Exp Hematol Oncol 2023; 12:5. [PMID: 36624522 PMCID: PMC9828428 DOI: 10.1186/s40164-022-00368-w] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2022] [Accepted: 12/30/2022] [Indexed: 01/11/2023] Open
Abstract
T-cell acute lymphoblastic leukemia (T-ALL) is a challenging pediatric and adult haematologic disease still associated with an unsatisfactory cure rate. Unlike B-ALL, the availability of novel therapeutic options to definitively improve the life expectancy for relapsed/resistant patients is poor. Indeed, the shared expression of surface targets among normal and neoplastic T-cells still limits the efficacy and may induce fratricide effects, hampering the use of innovative immunotherapeutic strategies. However, novel monoclonal antibodies, bispecific T-cell engagers (BTCEs), and chimeric antigen receptors (CAR) T-cells recently showed encouraging results and some of them are in an advanced stage of pre-clinical development or are currently under investigation in clinical trials. Here, we review this exciting scenario focusing on most relevant advances, challenges, and perspectives of the emerging landscape of immunotherapy of T-cell malignancies.
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Affiliation(s)
- Daniele Caracciolo
- Department of Experimental and Clinical Medicine, Magna Græcia University, Catanzaro, Italy
| | - Antonia Mancuso
- Department of Experimental and Clinical Medicine, Magna Græcia University, Catanzaro, Italy
| | - Nicoletta Polerà
- Department of Experimental and Clinical Medicine, Magna Græcia University, Catanzaro, Italy
| | - Caterina Froio
- Department of Experimental and Clinical Medicine, Magna Græcia University, Catanzaro, Italy
| | - Giuseppe D'Aquino
- Department of Experimental and Clinical Medicine, Magna Græcia University, Catanzaro, Italy
| | - Caterina Riillo
- Department of Experimental and Clinical Medicine, Magna Græcia University, Catanzaro, Italy
| | | | - Pierfrancesco Tassone
- Department of Experimental and Clinical Medicine, Magna Græcia University, Catanzaro, Italy.
- Sbarro Institute for Cancer Research and Molecular Medicine, Center for Biotechnology, College of Science and Technology, Temple University, Philadelphia, PA, USA.
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7
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Gu H, He J, Li Y, Mi D, Guan T, Guo W, Liu B, Chen Y. B-cell Lymphoma 6 Inhibitors: Current Advances and Prospects of Drug Development for Diffuse Large B-cell Lymphomas. J Med Chem 2022; 65:15559-15583. [PMID: 36441945 DOI: 10.1021/acs.jmedchem.2c01433] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
B-cell lymphoma 6 (BCL6) is a transcriptional repressor that regulates the differentiation of B lymphocytes and mediates the formation of germinal centers (GCs) by recruiting corepressors through the BTB domain of BCL6. Physiological processes regulated by BCL6 involve cell activation, differentiation, DNA damage, and apoptosis. BCL6 is highly expressed when the gene is mutated, leading to the malignant proliferation of cells and drives tumorigenesis. BCL6 overexpression is closely correlated with tumorigenesis in diffuse large B-cell lymphoma (DLBCL) and other lymphomas, and BCL6 inhibitors can effectively inhibit some lymphomas and overcome resistance. Therefore, targeting BCL6 might be a promising therapeutic strategy for treating lymphomas. Herein, we comprehensively review the latest development of BCL6 inhibitors in diffuse large B-cell lymphoma and discuss the overview of the pharmacophores of BCL6 inhibitors and their efficacies in vitro and in vivo. Additionally, the current advances in BCL6 degraders are provided.
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Affiliation(s)
- Haijun Gu
- Shanghai Frontiers Science Center of Genome Editing and Cell Therapy, Shanghai Key Laboratory of Regulatory Biology, The Institute of Biomedical Sciences and School of Life Sciences, East China Normal University, Shanghai 200241, China
| | - Jia He
- Shanghai Frontiers Science Center of Genome Editing and Cell Therapy, Shanghai Key Laboratory of Regulatory Biology, The Institute of Biomedical Sciences and School of Life Sciences, East China Normal University, Shanghai 200241, China
| | - Yuzhan Li
- Shanghai Frontiers Science Center of Genome Editing and Cell Therapy, Shanghai Key Laboratory of Regulatory Biology, The Institute of Biomedical Sciences and School of Life Sciences, East China Normal University, Shanghai 200241, China
| | - Dazhao Mi
- Shanghai Frontiers Science Center of Genome Editing and Cell Therapy, Shanghai Key Laboratory of Regulatory Biology, The Institute of Biomedical Sciences and School of Life Sciences, East China Normal University, Shanghai 200241, China
| | - Tian Guan
- Shanghai Frontiers Science Center of Genome Editing and Cell Therapy, Shanghai Key Laboratory of Regulatory Biology, The Institute of Biomedical Sciences and School of Life Sciences, East China Normal University, Shanghai 200241, China
| | - Weikai Guo
- Shanghai Frontiers Science Center of Genome Editing and Cell Therapy, Shanghai Key Laboratory of Regulatory Biology, The Institute of Biomedical Sciences and School of Life Sciences, East China Normal University, Shanghai 200241, China
| | - Bo Liu
- State Key Laboratory of Dampness Syndrome of Chinese Medicine, The Second Clinical Medical College, Guangzhou University of Chinese Medicine, Guangzhou 510006, China
| | - Yihua Chen
- Shanghai Frontiers Science Center of Genome Editing and Cell Therapy, Shanghai Key Laboratory of Regulatory Biology, The Institute of Biomedical Sciences and School of Life Sciences, East China Normal University, Shanghai 200241, China
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8
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Zapata-García JA, Riveros-Magaña AR, Ortiz-Lazareno PC, Hernández-Flores G, Jave-Suárez LF, Aguilar-Lemarroy A. Comparative Genomic Hybridization and Transcriptome Sequencing Reveal Genes with Gain in Acute Lymphoblastic Leukemia: JUP Expression Emerges as a Survival-Related Gene. Diagnostics (Basel) 2022; 12:diagnostics12112788. [PMID: 36428851 PMCID: PMC9689318 DOI: 10.3390/diagnostics12112788] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Revised: 11/08/2022] [Accepted: 11/10/2022] [Indexed: 11/16/2022] Open
Abstract
Acute lymphoblastic leukemia (ALL) in children or adults is characterized by structural and numeric aberrations in chromosomes; these anomalies strongly correlate with prognosis and clinical outcome. Therefore, this work aimed to identify the genes present in chromosomal gain regions found more frequently in patients with acute lymphoblastic leukemia (ALL) and ALL-derived cell lines using comparative genomic hybridization (CGH). In addition, validation of the genes found in these regions was performed utilizing RNAseq from JURKAT, CEM, and SUP-B15 cell lines, as well as expression microarrays derived from a MILE study. Chromosomes with common gain zones that were maintained in six or more samples were 14, 17, and 22, in which a total of 22 genes were identified. From them, NT5C3B, CNP, ACLY, and GNB1L maintained overexpression at the mRNA level in the cell lines and in patients with ALL. It is noteworthy that SALL2 showed very high expression in T-ALL, while JUP was highly expressed in B-ALL lineages. Interestingly, the latter correlated with worse survival in patients. This provided evidence that the measurement of these genes has high potential for clinical utility; however, their expressions should first be evaluated with a sensitive test in a more significant number of patients.
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Affiliation(s)
- Jessica Alejandra Zapata-García
- Programa de Doctorado en Ciencias Biomédicas, Centro Universitario de Ciencias de la Salud, Universidad de Guadalajara, Guadalajara C.P. 44340, Mexico
- División de Inmunología, Centro de Investigación Biomédica de Occidente (CIBO), Instituto Mexicano del Seguro Social (IMSS), Guadalajara C.P. 44340, Mexico
| | - Alma Rocío Riveros-Magaña
- Centro Universitario del Sur, Universidad de Guadalajara, Ciudad Guzmán C.P. 49000, Mexico
- Hospital General Zona 9, Ciudad Guzmán C.P. 49000, Mexico
| | - Pablo Cesar Ortiz-Lazareno
- División de Inmunología, Centro de Investigación Biomédica de Occidente (CIBO), Instituto Mexicano del Seguro Social (IMSS), Guadalajara C.P. 44340, Mexico
| | - Georgina Hernández-Flores
- División de Inmunología, Centro de Investigación Biomédica de Occidente (CIBO), Instituto Mexicano del Seguro Social (IMSS), Guadalajara C.P. 44340, Mexico
| | - Luis Felipe Jave-Suárez
- Programa de Doctorado en Ciencias Biomédicas, Centro Universitario de Ciencias de la Salud, Universidad de Guadalajara, Guadalajara C.P. 44340, Mexico
- División de Inmunología, Centro de Investigación Biomédica de Occidente (CIBO), Instituto Mexicano del Seguro Social (IMSS), Guadalajara C.P. 44340, Mexico
| | - Adriana Aguilar-Lemarroy
- Programa de Doctorado en Ciencias Biomédicas, Centro Universitario de Ciencias de la Salud, Universidad de Guadalajara, Guadalajara C.P. 44340, Mexico
- División de Inmunología, Centro de Investigación Biomédica de Occidente (CIBO), Instituto Mexicano del Seguro Social (IMSS), Guadalajara C.P. 44340, Mexico
- Correspondence: ; Tel.: +52-331-520-7625
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9
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Abstract
PURPOSE OF REVIEW While the treatment of acute lymphoblastic leukemia (ALL) has improved significantly over the last 30 years, the majority of adult patients will have their disease relapse. The BCL-2 gene was initially discovered from follicular lymphoma research; however, the BH3 family of proteins has is emerging to be crucial in patients with ALL due to their reliance on the balance of these pro-apoptotic and anti-apoptotic proteins in the BH3 family. We discuss apoptosis in ALL, the reliance mechanisms, drug development in this space, and areas for future research. RECENT FINDINGS The first drugs that were developed to inhibit the BCL-2 pathway include both venetoclax (BCL-2 specific inhibitor) and navitoclax (BCL-2, BCL-XL, and BCL-W). These drugs show promise and have obtained complete remissions, minimal residual disease negative status, and have been used as a bridge to allogeneic hematopoietic stem cell transplantation in acute myeloid leukemia and chronic lymphocytic leukemia. There are multiple ongoing clinical trials looking to assess the use of BCL-2 inhibition with chemotherapy, targeted therapies, and bi-specific T-cell engager therapies not only in both frontline and relapsed refractory ALL but also in consolidation and maintenance phases. There is still a large need for improvement of ALL outcomes in adult patients. Research has shown that ALL depends on the BCL-2 family of proteins for cell survival and proliferation. Targeting this pathway with BCL-2 inhibition has led to encouraging results, and future research is aimed at incorporating this targeted therapy into current treatment paradigms.
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Affiliation(s)
- Wesley M Smith
- Comprehensive Cancer Center of Wake Forest University, Winston Salem, NC, USA
| | - Daniel R Reed
- Comprehensive Cancer Center of Wake Forest University, Winston Salem, NC, USA.
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10
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Baig MU, Rytting M, Roth M, Morani AC, Nunez C, Lin P, Cuglievan B. Venetoclax and Decitabine in Pediatric Refractory T-cell Lymphoblastic Lymphoma. J Pediatr Hematol Oncol 2021; 43:e991-e996. [PMID: 33480649 DOI: 10.1097/mph.0000000000002050] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Accepted: 11/27/2020] [Indexed: 11/25/2022]
Abstract
BACKGROUND Overall survival of adolescents with relapsed T-cell lymphoblastic lymphoma (T-LL) remains poor with limited options for salvage therapy. The BCL-2 inhibitor venetoclax combined with hypomethylating agents like decitabine, has shown favorable responses in elderly patients with acute myeloid leukemia. OBSERVATION We present the case of a 19-year-old adolescent with stage III relapsed and refractory T-LL who did not respond to 3 lines of salvage therapy. The patient was treated with venetoclax and decitabine and achieved a dramatic response. CONCLUSION This case highlights the potential clinical activity of venetoclax and decitabine in relapsed T-LL.
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Affiliation(s)
| | - Michael Rytting
- Departments of Pediatrics
- Leukemia, The University of Texas MD Anderson Cancer Center, Houston, TX
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11
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Paietta E, Roberts KG, Wang V, Gu Z, Buck GAN, Pei D, Cheng C, Levine RL, Abdel-Wahab O, Cheng Z, Wu G, Qu C, Shi L, Pounds S, Willman CL, Harvey R, Racevskis J, Barinka J, Zhang Y, Dewald GW, Ketterling RP, Alejos D, Lazarus HM, Luger SM, Foroni L, Patel B, Fielding AK, Melnick A, Marks DI, Moorman AV, Wiernik PH, Rowe JM, Tallman MS, Goldstone AH, Mullighan CG, Litzow MR. Molecular classification improves risk assessment in adult BCR-ABL1-negative B-ALL. Blood 2021; 138:948-958. [PMID: 33895809 PMCID: PMC9069478 DOI: 10.1182/blood.2020010144] [Citation(s) in RCA: 53] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2020] [Accepted: 03/25/2021] [Indexed: 11/20/2022] Open
Abstract
Genomic classification has improved risk assignment of pediatric, but not adult B-lineage acute lymphoblastic leukemia (B-ALL). The international UKALLXII/ECOG-ACRIN E2993 (#NCT00002514) trial accrued 1229 adolescent/adult patients with BCR-ABL1- B-ALL (aged 14 to 65 years). Although 93% of patients achieved remission, 41% relapsed at a median of 13 months (range, 28 days to 12 years). Five-year overall survival (OS) was 42% (95% confidence interval, 39, 44). Transcriptome sequencing, gene expression profiling, cytogenetics, and fusion polymerase chain reaction enabled genomic subtyping of 282 patient samples, of which 264 were eligible for trial, accounting for 64.5% of E2993 patients. Among patients with outcome data, 29.5% with favorable outcomes (5-year OS 65% to 80%) were deemed standard risk (DUX4-rearranged [9.2%], ETV6-RUNX1/-like [2.3%], TCF3-PBX1 [6.9%], PAX5 P80R [4.1%], high-hyperdiploid [6.9%]); 50.2% had high-risk genotypes with 5-year OS of 0% to 27% (Ph-like [21.2%], KMT2A-AFF1 [12%], low-hypodiploid/near-haploid [14.3%], BCL2/MYC-rearranged [2.8%]); 20.3% had intermediate-risk genotypes with 5-year OS of 33% to 45% (PAX5alt [12.4%], ZNF384/-like [5.1%], MEF2D-rearranged [2.8%]). IKZF1 alterations occurred in 86% of Ph-like, and TP53 mutations in patients who were low-hypodiploid (54%) and BCL2/MYC-rearranged (33%) but were not independently associated with outcome. Of patients considered high risk based on presenting age and white blood cell count, 40% harbored subtype-defining genetic alterations associated with standard- or intermediate-risk outcomes. We identified distinct immunophenotypic features for DUX4-rearranged, PAX5 P80R, ZNF384-R/-like, and Ph-like genotypes. These data in a large adult B-ALL cohort treated with a non-risk-adapted approach on a single trial show the prognostic importance of genomic analyses, which may translate into future therapeutic benefits.
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Affiliation(s)
| | - Kathryn G Roberts
- Department of Pathology, St Jude Children's Research Hospital, Memphis, TN
| | - Victoria Wang
- Department of Data Science, Dana-Farber Cancer Institute, Boston, MA
| | - Zhaohui Gu
- Department of Pathology, St Jude Children's Research Hospital, Memphis, TN
| | - Georgina A N Buck
- Clinical Trial Service Unit, Nuttfield Department of Population Health, Oxford, United Kingdom
| | - Deqing Pei
- Department of Biostatistics, St. Jude Children's Research Hospital, Memphis, TN
| | - Cheng Cheng
- Department of Biostatistics, St. Jude Children's Research Hospital, Memphis, TN
| | - Ross L Levine
- Human Oncology and Pathogenesis Program-Leukemia Service, Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, NY
| | - Omar Abdel-Wahab
- Human Oncology and Pathogenesis Program-Leukemia Service, Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, NY
| | - Zhongshan Cheng
- Centre for Applied Bioinformatics, St Jude Children's Research Hospital, Memphis, TN
| | - Gang Wu
- Centre for Applied Bioinformatics, St Jude Children's Research Hospital, Memphis, TN
| | - Chunxu Qu
- Department of Pathology, St Jude Children's Research Hospital, Memphis, TN
| | - Lei Shi
- Department of Biostatistics, St. Jude Children's Research Hospital, Memphis, TN
| | - Stanley Pounds
- Department of Biostatistics, St. Jude Children's Research Hospital, Memphis, TN
| | - Cheryl L Willman
- University of New Mexico Comprehensive Cancer Center, Albuquerque, NM
| | - Richard Harvey
- University of New Mexico Comprehensive Cancer Center, Albuquerque, NM
| | - Janis Racevskis
- Department of Oncology, Montefiore Medical Center, Bronx, NY
| | - Jan Barinka
- Department of Pathology, St Jude Children's Research Hospital, Memphis, TN
| | - Yanming Zhang
- Department of Pathology, Memorial Sloan Kettering Cancer Center, New York, NY
| | - Gordon W Dewald
- Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN
| | - Rhett P Ketterling
- Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN
| | - David Alejos
- Department of Oncology, Montefiore Medical Center, Bronx, NY
| | - Hillard M Lazarus
- Department of Medicine, University Hospitals Cleveland Medical Center, Case Western Reserve University, Cleveland, OH
| | - Selina M Luger
- Abramson Cancer Center, University of Pennsylvania, Philadelphia, PA
| | - Letizia Foroni
- Centre for Haematology, Department of Medicine, Imperial College London Hammersmith Hospital, London, United Kingdom
| | - Bela Patel
- Centre for Haemato-Oncology, Barts Cancer Institute, Queen Mary University of London, London, United Kingdom
| | | | - Ari Melnick
- Division of Hematology and Medical Oncology, Department of Medicine, Weill Medical College of Cornell University, New York, NY
| | - David I Marks
- Bristol Haematology and Oncology Centre, Bristol, United Kingdom
| | - Anthony V Moorman
- Leukaemia Research Cytogenetics Group, Newcastle University Translational and Clinical Research Institute, Newcastle-upon-Tyne, United Kingdom
| | | | - Jacob M Rowe
- Department of Hematology, Shaare Zedek Medical Center, Jerusalem, Israel
| | - Martin S Tallman
- Leukemia Service, Memorial Sloan Kettering Cancer Center, Weill Cornell Medical College, New York, NY
| | | | | | - Mark R Litzow
- Division of Hematology, Department of Internal Medicine, Mayo Clinic, Rochester, MN
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12
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Nix MA, Mandal K, Geng H, Paranjape N, Lin YHT, Rivera JM, Marcoulis M, White KL, Whitman JD, Bapat SP, Parker KR, Ramirez J, Deucher A, Phojanokong P, Steri V, Fattahi F, Hann BC, Satpathy AT, Manglik A, Stieglitz E, Wiita AP. Surface Proteomics Reveals CD72 as a Target for In Vitro-Evolved Nanobody-Based CAR-T Cells in KMT2A/MLL1-Rearranged B-ALL. Cancer Discov 2021; 11:2032-2049. [PMID: 33727310 PMCID: PMC8338785 DOI: 10.1158/2159-8290.cd-20-0242] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2020] [Revised: 02/09/2021] [Accepted: 03/12/2021] [Indexed: 12/15/2022]
Abstract
Alternative strategies are needed for patients with B-cell malignancy relapsing after CD19-targeted immunotherapy. Here, cell surface proteomics revealed CD72 as an optimal target for poor-prognosis KMT2A/MLL1-rearranged (MLLr) B-cell acute lymphoblastic leukemia (B-ALL), which we further found to be expressed in other B-cell malignancies. Using a recently described, fully in vitro system, we selected synthetic CD72-specific nanobodies, incorporated them into chimeric antigen receptors (CAR), and demonstrated robust activity against B-cell malignancy models, including CD19 loss. Taking advantage of the role of CD72 in inhibiting B-cell receptor signaling, we found that SHIP1 inhibition increased CD72 surface density. We establish that CD72-nanobody CAR-T cells are a promising therapy for MLLr B-ALL. SIGNIFICANCE: Patients with MLLr B-ALL have poor prognoses despite recent immunotherapy advances. Here, surface proteomics identifies CD72 as being enriched on MLLr B-ALL but also widely expressed across B-cell cancers. We show that a recently described, fully in vitro nanobody platform generates binders highly active in CAR-T cells and demonstrate its broad applicability for immunotherapy development.This article is highlighted in the In This Issue feature, p. 1861.
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Affiliation(s)
- Matthew A Nix
- Department of Laboratory Medicine, University of California, San Francisco, San Francisco, California
| | - Kamal Mandal
- Department of Laboratory Medicine, University of California, San Francisco, San Francisco, California
| | - Huimin Geng
- Department of Laboratory Medicine, University of California, San Francisco, San Francisco, California
| | - Neha Paranjape
- Department of Laboratory Medicine, University of California, San Francisco, San Francisco, California
| | - Yu-Hsiu T Lin
- Department of Laboratory Medicine, University of California, San Francisco, San Francisco, California
| | - Jose M Rivera
- Department of Pediatrics, University of California, San Francisco, San Francisco, California
| | - Makeba Marcoulis
- Department of Laboratory Medicine, University of California, San Francisco, San Francisco, California
| | - Kristie L White
- Department of Laboratory Medicine, University of California, San Francisco, San Francisco, California
| | - Jeffrey D Whitman
- Department of Laboratory Medicine, University of California, San Francisco, San Francisco, California
| | - Sagar P Bapat
- Department of Laboratory Medicine, University of California, San Francisco, San Francisco, California
| | - Kevin R Parker
- Department of Pathology, Stanford University, Stanford, California
| | - Jonathan Ramirez
- Cardiovascular Research Institute, University of California, San Francisco, San Francisco, California
| | - Anne Deucher
- Department of Laboratory Medicine, University of California, San Francisco, San Francisco, California
| | - Paul Phojanokong
- Helen Diller Family Comprehensive Cancer Center, University of California, San Francisco, San Francisco, California
| | - Veronica Steri
- Helen Diller Family Comprehensive Cancer Center, University of California, San Francisco, San Francisco, California
| | - Faranak Fattahi
- Cardiovascular Research Institute, University of California, San Francisco, San Francisco, California
| | - Byron C Hann
- Helen Diller Family Comprehensive Cancer Center, University of California, San Francisco, San Francisco, California
| | | | - Aashish Manglik
- Department of Pharmaceutical Chemistry, University of California, San Francisco, San Francisco, California
- Department of Anesthesia, University of California, San Francisco, San Francisco, California
| | - Elliot Stieglitz
- Department of Pediatrics, University of California, San Francisco, San Francisco, California
| | - Arun P Wiita
- Department of Laboratory Medicine, University of California, San Francisco, San Francisco, California.
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13
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Harman JR, Thorne R, Jamilly M, Tapia M, Crump NT, Rice S, Beveridge R, Morrissey E, de Bruijn MFTR, Roberts I, Roy A, Fulga TA, Milne TA. A KMT2A-AFF1 gene regulatory network highlights the role of core transcription factors and reveals the regulatory logic of key downstream target genes. Genome Res 2021; 31:1159-1173. [PMID: 34088716 PMCID: PMC8256865 DOI: 10.1101/gr.268490.120] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Accepted: 06/02/2021] [Indexed: 12/13/2022]
Abstract
Regulatory interactions mediated by transcription factors (TFs) make up complex networks that control cellular behavior. Fully understanding these gene regulatory networks (GRNs) offers greater insight into the consequences of disease-causing perturbations than can be achieved by studying single TF binding events in isolation. Chromosomal translocations of the lysine methyltransferase 2A (KMT2A) gene produce KMT2A fusion proteins such as KMT2A-AFF1 (previously MLL-AF4), causing poor prognosis acute lymphoblastic leukemias (ALLs) that sometimes relapse as acute myeloid leukemias (AMLs). KMT2A-AFF1 drives leukemogenesis through direct binding and inducing the aberrant overexpression of key genes, such as the anti-apoptotic factor BCL2 and the proto-oncogene MYC However, studying direct binding alone does not incorporate possible network-generated regulatory outputs, including the indirect induction of gene repression. To better understand the KMT2A-AFF1-driven regulatory landscape, we integrated ChIP-seq, patient RNA-seq, and CRISPR essentiality screens to generate a model GRN. This GRN identified several key transcription factors such as RUNX1 that regulate target genes downstream of KMT2A-AFF1 using feed-forward loop (FFL) and cascade motifs. A core set of nodes are present in both ALL and AML, and CRISPR screening revealed several factors that help mediate response to the drug venetoclax. Using our GRN, we then identified a KMT2A-AFF1:RUNX1 cascade that represses CASP9, as well as KMT2A-AFF1-driven FFLs that regulate BCL2 and MYC through combinatorial TF activity. This illustrates how our GRN can be used to better connect KMT2A-AFF1 behavior to downstream pathways that contribute to leukemogenesis, and potentially predict shifts in gene expression that mediate drug response.
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Affiliation(s)
- Joe R Harman
- MRC Molecular Haematology Unit, MRC Weatherall Institute of Molecular Medicine, Radcliffe Department of Medicine, University of Oxford, Oxford, OX3 9DS, United Kingdom
| | - Ross Thorne
- MRC Molecular Haematology Unit, MRC Weatherall Institute of Molecular Medicine, Radcliffe Department of Medicine, University of Oxford, Oxford, OX3 9DS, United Kingdom
| | - Max Jamilly
- MRC Weatherall Institute of Molecular Medicine, Radcliffe Department of Medicine, University of Oxford, Oxford, OX3 9DS, United Kingdom
| | - Marta Tapia
- MRC Molecular Haematology Unit, MRC Weatherall Institute of Molecular Medicine, Radcliffe Department of Medicine, University of Oxford, Oxford, OX3 9DS, United Kingdom
| | - Nicholas T Crump
- MRC Molecular Haematology Unit, MRC Weatherall Institute of Molecular Medicine, Radcliffe Department of Medicine, University of Oxford, Oxford, OX3 9DS, United Kingdom
| | - Siobhan Rice
- MRC Molecular Haematology Unit, MRC Weatherall Institute of Molecular Medicine, Radcliffe Department of Medicine, University of Oxford, Oxford, OX3 9DS, United Kingdom
- MRC Molecular Haematology Unit, MRC Weatherall Institute of Molecular Medicine, Department of Paediatrics, University of Oxford, Oxford, OX3 9DS, United Kingdom
| | - Ryan Beveridge
- MRC Molecular Haematology Unit, MRC Weatherall Institute of Molecular Medicine, Radcliffe Department of Medicine, University of Oxford, Oxford, OX3 9DS, United Kingdom
- Virus Screening Facility, MRC Weatherall Institute of Molecular Medicine, John Radcliffe Hospital, University of Oxford, Oxford, OX3 9DS, United Kingdom
| | - Edward Morrissey
- Center for Computational Biology, Weatherall Institute of Molecular Medicine, University of Oxford, John Radcliffe Hospital, Oxford OX3 9DS, United Kingdom
| | - Marella F T R de Bruijn
- MRC Molecular Haematology Unit, MRC Weatherall Institute of Molecular Medicine, Radcliffe Department of Medicine, University of Oxford, Oxford, OX3 9DS, United Kingdom
| | - Irene Roberts
- MRC Molecular Haematology Unit, MRC Weatherall Institute of Molecular Medicine, Department of Paediatrics, University of Oxford, Oxford, OX3 9DS, United Kingdom
- NIHR Oxford Biomedical Research Centre Haematology Theme, University of Oxford, Oxford, OX3 9DS, United Kingdom
| | - Anindita Roy
- MRC Molecular Haematology Unit, MRC Weatherall Institute of Molecular Medicine, Department of Paediatrics, University of Oxford, Oxford, OX3 9DS, United Kingdom
- NIHR Oxford Biomedical Research Centre Haematology Theme, University of Oxford, Oxford, OX3 9DS, United Kingdom
| | - Tudor A Fulga
- MRC Weatherall Institute of Molecular Medicine, Radcliffe Department of Medicine, University of Oxford, Oxford, OX3 9DS, United Kingdom
| | - Thomas A Milne
- MRC Molecular Haematology Unit, MRC Weatherall Institute of Molecular Medicine, Radcliffe Department of Medicine, University of Oxford, Oxford, OX3 9DS, United Kingdom
- NIHR Oxford Biomedical Research Centre Haematology Theme, University of Oxford, Oxford, OX3 9DS, United Kingdom
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14
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Short NJ, Kantarjian H, Jabbour E. Optimizing the treatment of acute lymphoblastic leukemia in younger and older adults: new drugs and evolving paradigms. Leukemia 2021; 35:3044-3058. [PMID: 34172894 DOI: 10.1038/s41375-021-01277-3] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2021] [Revised: 04/12/2021] [Accepted: 04/29/2021] [Indexed: 12/18/2022]
Abstract
In the past decade, the available treatments for patients with acute lymphoblastic leukemia (ALL) have rapidly expanded, in parallel with an increased understanding of the genomic features that impact the disease biology and clinical outcomes. With the development of the anti-CD22 antibody-drug conjugate inotuzumab ozogamicin, the CD3-CD19 bispecific T-cell engager antibody blinatumomab, CD19 chimeric antigen receptor T-cell therapy, and the potent BCR-ABL1 tyrosine kinase inhibitor ponatinib, the outlook of ALL in both younger and older adults has substantially improved. The availability of highly effective drugs raised important questions concerning the optimal combination and sequence of these agents, their incorporation into frontline regimens, and the role of hematopoietic stem cell transplantation. In this review, we discuss the rapidly evolving paradigms in the treatment of ALL, highlighting both established and effective regimens, as well as promising new therapies that are being evaluated in ongoing clinical trials. We specifically focus on novel combination regimens in both the frontline and salvage settings that are leading to new standards of care in the treatment of ALL.
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Affiliation(s)
- Nicholas J Short
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Hagop Kantarjian
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Elias Jabbour
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, TX, USA.
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15
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Zhang Z, Zhou Q, Luo F, Zhou R, Xu J, Xiao J, Dai F, Song L. Circular RNA circ-CHI3L1.2 modulates cisplatin resistance of osteosarcoma cells via the miR-340-5p/LPAATβ axis. Hum Cell 2021; 34:1558-1568. [PMID: 34164774 DOI: 10.1007/s13577-021-00564-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2021] [Accepted: 06/04/2021] [Indexed: 12/26/2022]
Abstract
Resistance to chemotherapy drugs is a major factor affecting the surgical outcome and prognosis of osteosarcoma patients. Circular RNAs (circRNAs) play an important role in tumor resistance to chemotherapy. In the present study, we aimed to investigate the role and mechanism of circRNA circ-chitinase 3-like 1.2 (CHI3L1.2) in resistance to cisplatin chemotherapy in osteosarcoma. We found that circ-CHI3L1.2 levels were higher in cisplatin-resistant cells than in their parent cells. circ-CHI3L1.2 knockdown decreased the half-maximal inhibitory concentration (IC50) of cisplatin and the expression levels of P-glycoprotein (P-gp), multidrug-resistance protein 1 (MRP1), and glutathione-S-transferase Pi1 (GSTP1), and promoted apoptosis of cisplatin-resistant osteosarcoma cells. In addition, circ-CHI3L1.2 knockdown induced mesenchymal to epithelial transition (MET) and suppressed cell migration and invasion. The competitive endogenous RNA (ceRNA) mechanism indicated that circ-CHI3L1.2 targets the micro-RNA (miR)-340-5p-lysophosphatidic acid acyltransferase β (LPAATβ) axis, and inhibition of miR-340-5p alleviates the effect of circ-CHI3L1.2 knockdown. In conclusion, circ-CHI3L1.2 levels were increased in cisplatin-resistant osteosarcoma cells and circ-CHI3L1.2 knockdown sensitized cisplatin-resistant osteosarcoma cells to cisplatin through the miR-340-5p-LPAATβ axis.
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Affiliation(s)
- Zehua Zhang
- Department of Orthopaedics, First Affiliated Hospital, Army Medical University, No. 30 Gaotanyanzheng street, Chongqing, 400038, China
| | - Qiang Zhou
- Department of Orthopaedics, Third Affiliated Hospital, Medical University of Chongqing, Chongqing, 401120, China
| | - Fei Luo
- Department of Orthopaedics, First Affiliated Hospital, Army Medical University, No. 30 Gaotanyanzheng street, Chongqing, 400038, China
| | - Rui Zhou
- Department of Orthopaedics, First Affiliated Hospital, Army Medical University, No. 30 Gaotanyanzheng street, Chongqing, 400038, China
| | - Jianzhong Xu
- Department of Orthopaedics, First Affiliated Hospital, Army Medical University, No. 30 Gaotanyanzheng street, Chongqing, 400038, China
| | - Jun Xiao
- Department of Orthopaedics, First Affiliated Hospital, Army Medical University, No. 30 Gaotanyanzheng street, Chongqing, 400038, China
| | - Fei Dai
- Department of Orthopaedics, First Affiliated Hospital, Army Medical University, No. 30 Gaotanyanzheng street, Chongqing, 400038, China.
| | - Lei Song
- Department of Orthopaedics, First Affiliated Hospital, Army Medical University, No. 30 Gaotanyanzheng street, Chongqing, 400038, China.
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16
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Aref S, Azmy E, El Ghannam D, Haroun M, Ibrahim L, Sabry M. Clinical value of CD25/CD123 co-expression in acute myeloid leukemia patients. Cancer Biomark 2021; 29:9-16. [PMID: 32417762 DOI: 10.3233/cbm-201519] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
BACKGROUND This study aimed to assess the significance of combined expression of interleukin-2 receptor (CD25) and the interleukin-3 receptor (CD123) in acute myeloid leukemia (AML) patients. METHODS The expression of CD25 and CD123 on blast cells in bone marrow samples were identified by flowcytometry in 94 patients (⩽ 60 years old) with de novo acute myeloid leukemia (AML) treated at the Mansoura University Oncology Center (MUOC). RESULTS Of the 94 samples at diagnosis there were 17 (18.1%) CD25+/CD123+ (double positive) cases; 25 (26.6%) CD25+/CD123- (single positive); 32 (34.0%) CD25-/CD123+ (single positive) cases; 20 (21.3%). CD25-/CD123- (double negative). Most of the AML patients have double CD25+/CD123+ were significantly associated with poor and intermediate risk as compared to those associated with those in the good risk group (P= 0.005). The lowest induction of remission was recorded in AML patients have double CD25+/CD123+ expression as compared to the remaining AML patient group. Study the effect of these biomarkers on the overall survival reveal that AML patients exhibited double CD25+/CD123+ expression had significantly shorter overall survival as compared to negative ones. CONCLUSION Double CD25+/CD123+ co-expression in AML patients is a dismal prognostic marker and could be used as novel biomarker for risk stratification for AML patients.
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Affiliation(s)
- Salah Aref
- Hematology Unit, Clinical Pathology Department, Mansoura University Oncology Center, Mansoura University, Mansoura, Egypt
| | - Emaad Azmy
- Clinical Hematology Unit, Mansoura University Oncology Center, Mansoura University, Mansoura, Egypt
| | - Doaa El Ghannam
- Hematology Unit, Clinical Pathology Department, Mansoura University Oncology Center, Mansoura University, Mansoura, Egypt
| | - Marwa Haroun
- Hematology Unit, Clinical Pathology Department, Mansoura University Oncology Center, Mansoura University, Mansoura, Egypt
| | - Lamiaa Ibrahim
- Hematology Unit, Clinical Pathology Department, Mansoura University Oncology Center, Mansoura University, Mansoura, Egypt
| | - Mohamed Sabry
- Hematology Unit, Clinical Pathology Department, Mansoura University Oncology Center, Mansoura University, Mansoura, Egypt
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17
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Chen D, Camponeschi A, Nordlund J, Marincevic‐Zuniga Y, Abrahamsson J, Lönnerholm G, Fogelstrand L, Mårtensson I. RAG1 co-expression signature identifies ETV6-RUNX1-like B-cell precursor acute lymphoblastic leukemia in children. Cancer Med 2021; 10:3997-4003. [PMID: 33987955 PMCID: PMC8209579 DOI: 10.1002/cam4.3928] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Revised: 03/15/2021] [Accepted: 04/06/2021] [Indexed: 12/05/2022] Open
Abstract
B-cell precursor acute lymphoblastic leukemia (BCP-ALL) can be classified into subtypes according to the genetic aberrations they display. For instance, the translocation t(12;21)(p13;q22), representing the ETV6-RUNX1 fusion gene (ER), is present in a quarter of BCP-ALL cases. However, around 10% of the cases lack classifying chromosomal abnormalities (B-other). In pediatric ER BCP-ALL, rearrangement mediated by RAG (recombination-activating genes) has been proposed as the predominant driver of oncogenic rearrangement. Herein we analyzed almost 1600 pediatric BCP-ALL samples to determine which subtypes express RAG. We demonstrate that RAG1 mRNA levels are especially high in the ETV6-RUNX1 (ER) subtype and in a subset of B-other samples. We also define 31 genes that are co-expressed with RAG1 (RAG1-signature) in the ER subtype, a signature that also identifies this subset of B-other samples. Moreover, this subset also shares leukemia and pro-B gene expression signatures as well as high levels of the ETV6 target genes (BIRC7, WBP1L, CLIC5, ANGPTL2) with the ER subtype, indicating that these B-other cases are the recently identified ER-like subtype. We validated our results in a cohort where ER-like has been defined, which confirmed expression of the RAG1-signature in this recently described subtype. Taken together, our results demonstrate that the RAG1-signature identifies the ER-like subtype. As there are no definitive genetic markers to identify this novel subtype, the RAG1-signature represents a means to screen for this leukemia in children.
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Affiliation(s)
- Dongfeng Chen
- Institute of Life SciencesJiangsu UniversityZhenjiangChina
- Department of Rheumatology and Inflammation ResearchInstitute of MedicineSahlgrenska AcademyUniversity of GothenburgGothenburgSweden
| | - Alessandro Camponeschi
- Department of Rheumatology and Inflammation ResearchInstitute of MedicineSahlgrenska AcademyUniversity of GothenburgGothenburgSweden
| | - Jessica Nordlund
- Department of Medical SciencesMolecular Medicine and Science for Life LaboratoryUppsala UniversityUppsalaSweden
| | - Yanara Marincevic‐Zuniga
- Department of Medical SciencesMolecular Medicine and Science for Life LaboratoryUppsala UniversityUppsalaSweden
| | - Jonas Abrahamsson
- Department of PediatricsInstitute of Clinical SciencesSahlgrenska University HospitalGothenburgSweden
| | - Gudmar Lönnerholm
- Department of Women and Children’s HealthUppsala UniversityUppsalaSweden
| | - Linda Fogelstrand
- Department of Clinical ChemistrySahlgrenska University HospitalGothenburgSweden
- Department of Clinical Chemistry and Transfusion MedicineUniversity of GothenburgGothenburgSweden
| | - Inga‐Lill Mårtensson
- Department of Rheumatology and Inflammation ResearchInstitute of MedicineSahlgrenska AcademyUniversity of GothenburgGothenburgSweden
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18
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Ai Y, Hwang L, MacKerell AD, Melnick A, Xue F. Progress toward B-Cell Lymphoma 6 BTB Domain Inhibitors for the Treatment of Diffuse Large B-Cell Lymphoma and Beyond. J Med Chem 2021; 64:4333-4358. [PMID: 33844535 DOI: 10.1021/acs.jmedchem.0c01686] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
B-cell lymphoma 6 (BCL6) is a master regulator of germinal center formation that produce antibody-secreting plasma cells and memory B-cells for sustained immune responses. The BTB domain of BCL6 (BCL6BTB) forms a homodimer that mediates transcriptional repression by recruiting its corepressor proteins to form a biologically functional transcriptional complex. The protein-protein interaction (PPI) between the BCL6BTB and its corepressors has emerged as a therapeutic target for the treatment of DLBCL and a number of other human cancers. This Perspective provides an overview of recent advances in the development of BCL6BTB inhibitors from reversible inhibitors, irreversible inhibitors, to BCL6 degraders. Inhibitor design and medicinal chemistry strategies for the development of novel compounds will be provided. The binding mode of new inhibitors to BCL6BTB are highlighted. Also, the in vitro and in vivo assays used for the evaluation of new compounds will be discussed.
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Affiliation(s)
- Yong Ai
- Department of Pharmaceutical Sciences, University of Maryland School of Pharmacy, 20 Penn Street, Baltimore, Maryland 21201, United States
| | - Lucia Hwang
- Department of Pharmaceutical Sciences, University of Maryland School of Pharmacy, 20 Penn Street, Baltimore, Maryland 21201, United States
| | - Alexander D MacKerell
- Department of Pharmaceutical Sciences, University of Maryland School of Pharmacy, 20 Penn Street, Baltimore, Maryland 21201, United States
| | - Ari Melnick
- Department of Hematology and Oncology, Weill Cornell Medical College, New York, New York 10021, United States.,Department of Pharmacology, Weill Cornell Medical College, New York, New York 10021, United States
| | - Fengtian Xue
- Department of Pharmaceutical Sciences, University of Maryland School of Pharmacy, 20 Penn Street, Baltimore, Maryland 21201, United States
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19
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de Barrios O, Parra M. Epigenetic Control of Infant B Cell Precursor Acute Lymphoblastic Leukemia. Int J Mol Sci 2021; 22:ijms22063127. [PMID: 33803872 PMCID: PMC8003172 DOI: 10.3390/ijms22063127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2021] [Revised: 03/17/2021] [Accepted: 03/17/2021] [Indexed: 11/16/2022] Open
Abstract
B-cell precursor acute lymphoblastic leukemia (BCP-ALL) is a highly aggressive malignancy, with poorer prognosis in infants than in adults. A genetic signature has been associated with this outcome but, remarkably, leukemogenesis is commonly triggered by genetic alterations of embryonic origin that involve the deregulation of chromatin remodelers. This review considers in depth how the alteration of epigenetic profiles (at DNA and histone levels) induces an aberrant phenotype in B lymphocyte progenitors by modulating the oncogenic drivers and tumor suppressors involved in key cancer hallmarks. DNA methylation patterns have been widely studied in BCP-ALL and their correlation with survival has been established. However, the effect of methylation on histone residues can be very different. For instance, methyltransferase KMT2A gene participates in chromosomal rearrangements with several partners, imposing an altered pattern of methylated H3K4 and H3K79 residues, enhancing oncogene promoter activation, and conferring a worse outcome on affected infants. In parallel, acetylation processes provide an additional layer of epigenetic regulation and can alter the chromatin conformation, enabling the binding of regulatory factors. Therefore, an integrated knowledge of all epigenetic disorders is essential to understand the molecular basis of BCP-ALL and to identify novel entry points that can be exploited to improve therapeutic options and disease prognosis.
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Affiliation(s)
- Oriol de Barrios
- Correspondence: (O.d.B.); (M.P.); Tel.: +34-93-557-28-00 (ext. 4222) (O.d.B.); +34-93-557-28-00 (ext. 4210) (M.P.)
| | - Maribel Parra
- Correspondence: (O.d.B.); (M.P.); Tel.: +34-93-557-28-00 (ext. 4222) (O.d.B.); +34-93-557-28-00 (ext. 4210) (M.P.)
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20
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Fathi E, Farahzadi R, Montazersaheb S, Bagheri Y. Epigenetic Modifications in Acute Lymphoblastic Leukemia: From Cellular Mechanisms to Therapeutics. Curr Gene Ther 2021; 21:60-71. [PMID: 33183201 DOI: 10.2174/1566523220999201111194554] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Revised: 10/23/2020] [Accepted: 11/02/2020] [Indexed: 11/22/2022]
Abstract
BACKGROUND Epigenetic modification pattern is considered as a characteristic feature in blood malignancies. Modifications in the DNA methylation modulators are recurrent in lymphoma and leukemia, so that the distinct methylation pattern defines different types of leukemia. Generally, the role of epigenetics is less understood, and most investigations are focused on genetic abnormalities and cytogenic studies to develop novel treatments for patients with hematologic disorders. Recently, understanding the underlying mechanism of acute lymphoblastic leukemia (ALL), especially epigenetic alterations as a driving force in the development of ALL opens a new era of investigation for developing promising strategy, beyond available conventional therapy. OBJECTIVE This review will focus on a better understanding of the epigenetic mechanisms in cancer development and progression, with an emphasis on epigenetic alterations in ALL including, DNA methylation, histone modification, and microRNA alterations. Other topics that will be discussed include the use of epigenetic alterations as a promising therapeutic target in order to develop novel, well-suited approaches against ALL. CONCLUSION According to the literature review, leukemogenesis of ALL is extensively influenced by epigenetic modifications, particularly DNA hyper-methylation, histone modification, and miRNA alteration.
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Affiliation(s)
- Ezzatollah Fathi
- Department of Clinical Sciences, Faculty of Veterinary Medicine, University of Tabriz, Tabriz, Iran
| | - Raheleh Farahzadi
- Hematology and Oncology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Soheila Montazersaheb
- Molecular Medicine Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Yasin Bagheri
- Young Researchers and Elite Club, Tabriz Branch, Islamic Azad University, Tabriz, Iran
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21
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Kealy L, Di Pietro A, Hailes L, Scheer S, Dalit L, Groom JR, Zaph C, Good-Jacobson KL. The Histone Methyltransferase DOT1L Is Essential for Humoral Immune Responses. Cell Rep 2020; 33:108504. [PMID: 33326791 DOI: 10.1016/j.celrep.2020.108504] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2020] [Revised: 10/02/2020] [Accepted: 11/17/2020] [Indexed: 12/11/2022] Open
Abstract
Histone modifiers are essential for the ability of immune cells to reprogram their gene expression during differentiation. The recruitment of the histone methyltransferase DOT1L (disruptor of telomeric silencing 1-like) induces oncogenic gene expression in a subset of B cell leukemias. Despite its importance, its role in the humoral immune system is unclear. Here, we demonstrate that DOT1L is a critical regulator of B cell biology. B cell development is defective in Dot1lf/fMb1Cre/+ mice, culminating in a reduction of peripheral mature B cells. Upon immunization or influenza infection of Dot1lf/fCd23Cre/+ mice, class-switched antibody-secreting cells are significantly attenuated and germinal centers fail to form. Consequently, DOT1L is essential for B cell memory formation. Transcriptome, pathway, and histological analyses identified a role for DOT1L in reprogramming gene expression for appropriate localization of B cells during the initial stage of the response. Together, these results demonstrate an essential role for DOT1L in generating an effective humoral immune response.
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Affiliation(s)
- Liam Kealy
- Department of Biochemistry and Molecular Biology, Monash University, Clayton, VIC 3800, Australia; Infection and Immunity Program, Biomedicine Discovery Institute, Monash University, Clayton, VIC 3800, Australia
| | - Andrea Di Pietro
- Department of Biochemistry and Molecular Biology, Monash University, Clayton, VIC 3800, Australia; Infection and Immunity Program, Biomedicine Discovery Institute, Monash University, Clayton, VIC 3800, Australia
| | - Lauren Hailes
- Department of Biochemistry and Molecular Biology, Monash University, Clayton, VIC 3800, Australia; Infection and Immunity Program, Biomedicine Discovery Institute, Monash University, Clayton, VIC 3800, Australia
| | - Sebastian Scheer
- Department of Biochemistry and Molecular Biology, Monash University, Clayton, VIC 3800, Australia; Infection and Immunity Program, Biomedicine Discovery Institute, Monash University, Clayton, VIC 3800, Australia
| | - Lennard Dalit
- Division of Immunology, Walter and Eliza Hall Institute of Medical Research, Parkville, VIC 3052, Australia; Department of Medical Biology, University of Melbourne, Parkville, VIC 3010, Australia
| | - Joanna R Groom
- Division of Immunology, Walter and Eliza Hall Institute of Medical Research, Parkville, VIC 3052, Australia; Department of Medical Biology, University of Melbourne, Parkville, VIC 3010, Australia
| | - Colby Zaph
- Department of Biochemistry and Molecular Biology, Monash University, Clayton, VIC 3800, Australia; Infection and Immunity Program, Biomedicine Discovery Institute, Monash University, Clayton, VIC 3800, Australia
| | - Kim L Good-Jacobson
- Department of Biochemistry and Molecular Biology, Monash University, Clayton, VIC 3800, Australia; Infection and Immunity Program, Biomedicine Discovery Institute, Monash University, Clayton, VIC 3800, Australia.
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22
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Lee J, Robinson ME, Ma N, Artadji D, Ahmed MA, Xiao G, Sadras T, Deb G, Winchester J, Cosgun KN, Geng H, Chan LN, Kume K, Miettinen TP, Zhang Y, Nix MA, Klemm L, Chen CW, Chen J, Khairnar V, Wiita AP, Thomas-Tikhonenko A, Farzan M, Jung JU, Weinstock DM, Manalis SR, Diamond MS, Vaidehi N, Müschen M. IFITM3 functions as a PIP3 scaffold to amplify PI3K signalling in B cells. Nature 2020; 588:491-497. [PMID: 33149299 PMCID: PMC8087162 DOI: 10.1038/s41586-020-2884-6] [Citation(s) in RCA: 50] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2019] [Accepted: 08/13/2020] [Indexed: 12/25/2022]
Abstract
Interferon-induced transmembrane protein 3 (IFITM3) has previously been identified as an endosomal protein that blocks viral infection1-3. Here we studied clinical cohorts of patients with B cell leukaemia and lymphoma, and identified IFITM3 as a strong predictor of poor outcome. In normal resting B cells, IFITM3 was minimally expressed and mainly localized in endosomes. However, engagement of the B cell receptor (BCR) induced both expression of IFITM3 and phosphorylation of this protein at Tyr20, which resulted in the accumulation of IFITM3 at the cell surface. In B cell leukaemia, oncogenic kinases phosphorylate IFITM3 at Tyr20, which causes constitutive localization of this protein at the plasma membrane. In a mouse model, Ifitm3-/- naive B cells developed in normal numbers; however, the formation of germinal centres and the production of antigen-specific antibodies were compromised. Oncogenes that induce the development of leukaemia and lymphoma did not transform Ifitm3-/- B cells. Conversely, the phosphomimetic IFITM3(Y20E) mutant induced oncogenic PI3K signalling and initiated the transformation of premalignant B cells. Mechanistic experiments revealed that IFITM3 functions as a PIP3 scaffold and central amplifier of PI3K signalling. The amplification of PI3K signals depends on IFITM3 using two lysine residues (Lys83 and Lys104) in its conserved intracellular loop as a scaffold for the accumulation of PIP3. In Ifitm3-/- B cells, lipid rafts were depleted of PIP3, which resulted in the defective expression of over 60 lipid-raft-associated surface receptors, and impaired BCR signalling and cellular adhesion. We conclude that the phosphorylation of IFITM3 that occurs after B cells encounter antigen induces a dynamic switch from antiviral effector functions in endosomes to a PI3K amplification loop at the cell surface. IFITM3-dependent amplification of PI3K signalling, which in part acts downstream of the BCR, is critical for the rapid expansion of B cells with high affinity to antigen. In addition, multiple oncogenes depend on IFITM3 to assemble PIP3-dependent signalling complexes and amplify PI3K signalling for malignant transformation.
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Affiliation(s)
- Jaewoong Lee
- Center of Molecular and Cellular Oncology, Yale Cancer Center, Yale School of Medicine, New Haven, CT, USA
| | - Mark E Robinson
- Center of Molecular and Cellular Oncology, Yale Cancer Center, Yale School of Medicine, New Haven, CT, USA
| | - Ning Ma
- Department of Computational and Quantitative Medicine, City of Hope Comprehensive Cancer Center, Duarte, CA, USA
| | - Dewan Artadji
- Center of Molecular and Cellular Oncology, Yale Cancer Center, Yale School of Medicine, New Haven, CT, USA
| | - Mohamed A Ahmed
- Department of Systems Biology, City of Hope Comprehensive Cancer Center, Duarte, CA, USA
| | - Gang Xiao
- Department of Systems Biology, City of Hope Comprehensive Cancer Center, Duarte, CA, USA
| | - Teresa Sadras
- Center of Molecular and Cellular Oncology, Yale Cancer Center, Yale School of Medicine, New Haven, CT, USA
| | - Gauri Deb
- Department of Systems Biology, City of Hope Comprehensive Cancer Center, Duarte, CA, USA
| | - Janet Winchester
- Department of Systems Biology, City of Hope Comprehensive Cancer Center, Duarte, CA, USA
| | - Kadriye Nehir Cosgun
- Center of Molecular and Cellular Oncology, Yale Cancer Center, Yale School of Medicine, New Haven, CT, USA
| | - Huimin Geng
- Department of Laboratory Medicine, University of California San Francisco, San Francisco, CA, USA
| | - Lai N Chan
- Center of Molecular and Cellular Oncology, Yale Cancer Center, Yale School of Medicine, New Haven, CT, USA
| | - Kohei Kume
- Center of Molecular and Cellular Oncology, Yale Cancer Center, Yale School of Medicine, New Haven, CT, USA
| | - Teemu P Miettinen
- Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA, USA.,Medical Research Council Laboratory for Molecular Cell Biology, University College London, London, UK
| | - Ye Zhang
- Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Matthew A Nix
- Department of Laboratory Medicine, University of California San Francisco, San Francisco, CA, USA
| | - Lars Klemm
- Center of Molecular and Cellular Oncology, Yale Cancer Center, Yale School of Medicine, New Haven, CT, USA
| | - Chun Wei Chen
- Department of Systems Biology, City of Hope Comprehensive Cancer Center, Duarte, CA, USA
| | - Jianjun Chen
- Department of Systems Biology, City of Hope Comprehensive Cancer Center, Duarte, CA, USA
| | - Vishal Khairnar
- Department of Systems Biology, City of Hope Comprehensive Cancer Center, Duarte, CA, USA
| | - Arun P Wiita
- Department of Laboratory Medicine, University of California San Francisco, San Francisco, CA, USA
| | - Andrei Thomas-Tikhonenko
- Department of Pathology and Laboratory Medicine, Children's Hospital of Philadelphia and Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Michael Farzan
- Department of Immunology and Microbiology, The Scripps Research Institute, Jupiter, FL, USA
| | - Jae U Jung
- Department of Cancer Biology, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, USA
| | - David M Weinstock
- Dana Farber Cancer Institute, Boston, MA, USA.,Harvard Medical School, Boston, MA, USA
| | - Scott R Manalis
- Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA, USA.,Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Michael S Diamond
- Department of Medicine, Washington University School of Medicine in St Louis, St Louis, MO, USA.,Department of Molecular Microbiology, Washington University School of Medicine in St Louis, St Louis, MO, USA.,Department of Pathology and Immunology, Washington University School of Medicine in St Louis, St Louis, MO, USA
| | - Nagarajan Vaidehi
- Department of Computational and Quantitative Medicine, City of Hope Comprehensive Cancer Center, Duarte, CA, USA
| | - Markus Müschen
- Center of Molecular and Cellular Oncology, Yale Cancer Center, Yale School of Medicine, New Haven, CT, USA. .,Department of Immunobiology, Yale University, New Haven, CT, USA.
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23
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Samra B, Jabbour E, Ravandi F, Kantarjian H, Short NJ. Evolving therapy of adult acute lymphoblastic leukemia: state-of-the-art treatment and future directions. J Hematol Oncol 2020; 13:70. [PMID: 32503572 PMCID: PMC7275444 DOI: 10.1186/s13045-020-00905-2] [Citation(s) in RCA: 91] [Impact Index Per Article: 22.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Accepted: 05/22/2020] [Indexed: 12/20/2022] Open
Abstract
Recent years have witnessed major advances that have improved outcome of adults with acute lymphoblastic leukemia (ALL). The emergence of the concept of measurable residual disease has fine-tuned our prognostic models and guided our treatment decisions. The treatment paradigms of ALL have been revolutionized with the advent of tyrosine kinase inhibitors targeting BCR-ABL1, monoclonal antibodies targeting CD20 (rituximab), antibody-drug conjugates targeting CD22 (inotuzumab ozogamicin), bispecific antibodies (blinatumomab), and CD19 chimeric antigen receptor T cell therapy (tisagenlecleucel). These highly effective new agents are allowing for novel approaches that reduce reliance on intensive cytotoxic chemotherapy and hematopoietic stem cell transplantation in first remission. This comprehensive review will focus on the recent advances and future directions in novel therapeutic strategies in adult ALL.
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Affiliation(s)
- Bachar Samra
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, 1515 Holcombe Boulevard, Houston, TX, 77030, USA
| | - Elias Jabbour
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, 1515 Holcombe Boulevard, Houston, TX, 77030, USA
| | - Farhad Ravandi
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, 1515 Holcombe Boulevard, Houston, TX, 77030, USA
| | - Hagop Kantarjian
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, 1515 Holcombe Boulevard, Houston, TX, 77030, USA
| | - Nicholas J Short
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, 1515 Holcombe Boulevard, Houston, TX, 77030, USA.
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24
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Characterizing the Role of SMYD2 in Mammalian Embryogenesis-Future Directions. Vet Sci 2020; 7:vetsci7020063. [PMID: 32408548 PMCID: PMC7357037 DOI: 10.3390/vetsci7020063] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2020] [Revised: 04/28/2020] [Accepted: 05/02/2020] [Indexed: 11/26/2022] Open
Abstract
The SET and MYND domain-containing (SMYD) family of lysine methyltransferases are essential in several mammalian developmental pathways. Although predominantly expressed in the heart, the role of SMYD2 in heart development has yet to be fully elucidated and has even been shown to be dispensable in a murine Nkx2-5-associated conditional knockout. Additionally, SMYD2 was recently shown to be necessary not only for lymphocyte development but also for the viability of hematopoietic leukemias. Based on the broad expression pattern of SMYD2 in mammalian tissues, it is likely that it plays pivotal roles in a host of additional normal and pathological processes. In this brief review, we consider what is currently known about the normal and pathogenic functions of SMYD2 and propose specific future directions for characterizing its role in embryogenesis.
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25
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Itskovich SS, Gurunathan A, Clark J, Burwinkel M, Wunderlich M, Berger MR, Kulkarni A, Chetal K, Venkatasubramanian M, Salomonis N, Kumar AR, Lee LH. MBNL1 regulates essential alternative RNA splicing patterns in MLL-rearranged leukemia. Nat Commun 2020; 11:2369. [PMID: 32398749 PMCID: PMC7217953 DOI: 10.1038/s41467-020-15733-8] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2019] [Accepted: 03/25/2020] [Indexed: 02/06/2023] Open
Abstract
Despite growing awareness of the biologic features underlying MLL-rearranged leukemia, targeted therapies for this leukemia have remained elusive and clinical outcomes remain dismal. MBNL1, a protein involved in alternative splicing, is consistently overexpressed in MLL-rearranged leukemias. We found that MBNL1 loss significantly impairs propagation of murine and human MLL-rearranged leukemia in vitro and in vivo. Through transcriptomic profiling of our experimental systems, we show that in leukemic cells, MBNL1 regulates alternative splicing (predominantly intron exclusion) of several genes including those essential for MLL-rearranged leukemogenesis, such as DOT1L and SETD1A. We finally show that selective leukemic cell death is achievable with a small molecule inhibitor of MBNL1. These findings provide the basis for a new therapeutic target in MLL-rearranged leukemia and act as further validation of a burgeoning paradigm in targeted therapy, namely the disruption of cancer-specific splicing programs through the targeting of selectively essential RNA binding proteins.
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Affiliation(s)
- Svetlana S Itskovich
- Division of Bone Marrow Transplantation and Immune Deficiency, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, 45229, USA
| | - Arun Gurunathan
- Cancer and Blood Diseases Institute, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, 45229, USA
| | - Jason Clark
- Division of Bone Marrow Transplantation and Immune Deficiency, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, 45229, USA
| | - Matthew Burwinkel
- Division of Bone Marrow Transplantation and Immune Deficiency, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, 45229, USA
| | - Mark Wunderlich
- Division of Experimental Hematology and Cancer Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, 45229, USA
| | - Mikaela R Berger
- College of Medicine, University of Cincinnati School of Medicine, Cincinnati, OH, 45267, USA
| | - Aishwarya Kulkarni
- Department of Electrical Engineering and Computer Science, University of Cincinnati, Cincinnati, OH, 45221, USA
- Division of Biomedical Informatics, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, 45229, USA
| | - Kashish Chetal
- Division of Biomedical Informatics, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, 45229, USA
| | - Meenakshi Venkatasubramanian
- Department of Electrical Engineering and Computer Science, University of Cincinnati, Cincinnati, OH, 45221, USA
- Division of Biomedical Informatics, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, 45229, USA
| | - Nathan Salomonis
- Division of Biomedical Informatics, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, 45229, USA
- Department of Pediatrics, University of Cincinnati School of Medicine, Cincinnati, OH, 45229, USA
| | - Ashish R Kumar
- Division of Bone Marrow Transplantation and Immune Deficiency, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, 45229, USA
- Department of Pediatrics, University of Cincinnati School of Medicine, Cincinnati, OH, 45229, USA
| | - Lynn H Lee
- Department of Pediatrics, University of Cincinnati School of Medicine, Cincinnati, OH, 45229, USA.
- Division of Oncology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, 45229, USA.
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Jordaens S, Cooksey L, Freire Boullosa L, Van Tendeloo V, Smits E, Mills KI, Orchard KH, Guinn BA. New targets for therapy: antigen identification in adults with B-cell acute lymphoblastic leukaemia. Cancer Immunol Immunother 2020; 69:867-877. [PMID: 31970440 PMCID: PMC7183504 DOI: 10.1007/s00262-020-02484-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2019] [Accepted: 01/04/2020] [Indexed: 12/11/2022]
Abstract
Acute lymphoblastic leukaemia (ALL) in adults is a rare and difficult-to-treat cancer that is characterised by excess lymphoblasts in the bone marrow. Although many patients achieve remission with chemotherapy, relapse rates are high and the associated impact on survival devastating. Most patients receive chemotherapy and for those whose overall fitness supports it, the most effective treatment to date is allogeneic stem cell transplant that can improve overall survival rates in part due to a 'graft-versus-leukaemia' effect. However, due to the rarity of this disease, and the availability of mature B-cell antigens on the cell surface, few new cancer antigens have been identified in adult B-ALL that could act as targets to remove residual disease in first remission or provide alternative targets for escape variants if and when current immunotherapy strategies fail. We have used RT-PCR analysis, literature searches, antibody-specific profiling and gene expression microarray analysis to identify and prioritise antigens as novel targets for the treatment of adult B-ALL.
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Affiliation(s)
- Stephanie Jordaens
- Department of Biomedical Sciences, University of Hull, Cottingham Road, Hardy Building, Room 111, Hull, HU7 6RX, UK
- Laboratory of Experimental Hematology, Vaccine and Infectious Disease Institute, University of Antwerp, Antwerp, Belgium
| | - Leah Cooksey
- Department of Biomedical Sciences, University of Hull, Cottingham Road, Hardy Building, Room 111, Hull, HU7 6RX, UK
| | | | - Viggo Van Tendeloo
- Laboratory of Experimental Hematology, Vaccine and Infectious Disease Institute, University of Antwerp, Antwerp, Belgium
| | - Evelien Smits
- Centre for Oncological Research, University of Antwerp, Antwerp, Belgium
| | - Ken I Mills
- Centre for Cancer Research and Cell Biology, Queens University Belfast, Lisburn Road, Belfast, UK
| | - Kim H Orchard
- Department of Haematology, University Hospital Southampton NHS Foundation Trust and University of Southampton, Southampton, UK
| | - Barbara-Ann Guinn
- Department of Biomedical Sciences, University of Hull, Cottingham Road, Hardy Building, Room 111, Hull, HU7 6RX, UK.
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27
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Brown MA, Edwards MA, Alshiraihi I, Geng H, Dekker JD, Tucker HO. The lysine methyltransferase SMYD2 is required for normal lymphocyte development and survival of hematopoietic leukemias. Genes Immun 2020; 21:119-130. [PMID: 32115575 PMCID: PMC7183909 DOI: 10.1038/s41435-020-0094-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2019] [Revised: 02/18/2020] [Accepted: 02/19/2020] [Indexed: 12/11/2022]
Abstract
The 5 membered SET and MYND Domain-containing lysine methyltransferase (SMYD) family plays pivotal roles in development and proliferation. Initially characterized within the cardiovascular system, one such member, SMYD2, has been implicated as an oncogene in leukemias deriving from flawed hematopoietic stem cell (HSC) differentiation. We show here that conditional SMYD2 loss disrupts hematopoiesis at and downstream of the HSC via both apoptotic loss and transcriptional deregulation of HSC proliferation and disruption of Wnt-β-Catenin signaling. Yet previously documented SMYD2 cell cycle targets were unscathed. Turning our analysis to human leukemias, we observed that SMYD2 is highly expressed in CML, MLLr-B-ALL, AML, T-ALL and B-ALL leukemias and its levels in B-ALL correlate with poor survival. SMYD2 knockdown results in apoptotic death and loss of anchorage-independent transformation of each of these hematopoietic leukemias. These data provide an underlying mechanism by which SMYD2 acts during normal hematopoiesis and as a proto-oncogene in leukemia.
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Affiliation(s)
- Mark A Brown
- Department of Clinical Sciences, Colorado State University, Fort Collins, CO, 80523, USA.,Cell and Molecular Biology Program, Colorado State University, Fort Collins, CO, 80523, USA
| | - Melissa A Edwards
- Cell and Molecular Biology Program, Colorado State University, Fort Collins, CO, 80523, USA.,Department of Molecular Biosciences, The University of Texas at Austin, 1 University Station A5000, Austin, TX, 78712, USA
| | - Ilham Alshiraihi
- Cell and Molecular Biology Program, Colorado State University, Fort Collins, CO, 80523, USA
| | - Huimin Geng
- Department of Laboratory Medicine, University of California, San Francisco, San Francisco, CA, 94143, USA
| | - Joseph D Dekker
- Department of Molecular Biosciences, The University of Texas at Austin, 1 University Station A5000, Austin, TX, 78712, USA
| | - Haley O Tucker
- Department of Molecular Biosciences, The University of Texas at Austin, 1 University Station A5000, Austin, TX, 78712, USA.
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28
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Jordaens S, Cooksey L, Bonney S, Orchard L, Coutinho M, Van Tendeloo V, Mills KI, Orchard K, Guinn BA. Serum profiling identifies ibrutinib as a treatment option for young adults with B-cell acute lymphoblastic leukaemia. Br J Haematol 2020; 189:500-512. [PMID: 32064588 DOI: 10.1111/bjh.16407] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2019] [Accepted: 11/10/2019] [Indexed: 12/19/2022]
Abstract
Acute lymphoblastic leukaemia (ALL) is a haematological malignancy that is characterized by the uncontrolled proliferation of immature lymphocytes. 80% of cases occur in children where ALL is well understood and treated. However it has a devastating affects on adults, where multi-agent chemotherapy is the standard of care with allogeneic stem cell transplantation for those who are eligible. New treatments are required to extend remission and prevent relapse to improve patient survival rates. We used serum profiling to compare samples from presentation adult B-ALL patients with age- and sex-matched healthy volunteer (HV) sera and identified 69 differentially recognised antigens (P ≤ 0·02). BMX, DCTPP1 and VGLL4 showed no differences in transcription between patients and healthy donors but were each found to be present at higher levels in B-ALL patient samples than HVs by ICC. BMX plays a crucial role in the Bruton's Tyrosine Kinase (BTK) pathway which is bound by the BTK inhibitor, ibrutinib, suggesting adult B-ALL would also be a worthy target patient group for future clinical trials. We have shown the utility of proto-array analysis of B-ALL patient sera, predominantly from young adults, to help characterise the B-ALL immunome and identified a new target patient population for existing small molecule therapy.
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Affiliation(s)
- Stephanie Jordaens
- Department of Biomedical Sciences, University of Hull, Hull, UK.,Vaccine & Infectious Disease Institute, Laboratory of Experimental Hematology, University of Antwerp, Antwerpen, Belgium
| | - Leah Cooksey
- Department of Biomedical Sciences, University of Hull, Hull, UK
| | - Stephanie Bonney
- Cancer Sciences Unit, Somers Cancer Sciences Building, University of Southampton, Southampton, UK
| | - Laurence Orchard
- Cancer Sciences Unit, Somers Cancer Sciences Building, University of Southampton, Southampton, UK
| | | | - Viggo Van Tendeloo
- Vaccine & Infectious Disease Institute, Laboratory of Experimental Hematology, University of Antwerp, Antwerpen, Belgium
| | - Ken I Mills
- Centre for Cancer Research and Cell Biology, Queens University Belfast, Belfast, UK
| | - Kim Orchard
- Department of Haematology, University Hospital Southampton NHS Foundation Trust and University of Southampton, Southampton, UK
| | - Barbara-Ann Guinn
- Department of Biomedical Sciences, University of Hull, Hull, UK.,Cancer Sciences Unit, Somers Cancer Sciences Building, University of Southampton, Southampton, UK
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Targeting PRMT1-mediated FLT3 methylation disrupts maintenance of MLL-rearranged acute lymphoblastic leukemia. Blood 2020; 134:1257-1268. [PMID: 31395602 DOI: 10.1182/blood.2019002457] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2019] [Accepted: 07/25/2019] [Indexed: 12/17/2022] Open
Abstract
Relapse remains the main cause of MLL-rearranged (MLL-r) acute lymphoblastic leukemia (ALL) treatment failure resulting from persistence of drug-resistant clones after conventional chemotherapy treatment or targeted therapy. Thus, defining mechanisms underlying MLL-r ALL maintenance is critical for developing effective therapy. PRMT1, which deposits an asymmetric dimethylarginine mark on histone/non-histone proteins, is reportedly overexpressed in various cancers. Here, we demonstrate elevated PRMT1 levels in MLL-r ALL cells and show that inhibition of PRMT1 significantly suppresses leukemic cell growth and survival. Mechanistically, we reveal that PRMT1 methylates Fms-like receptor tyrosine kinase 3 (FLT3) at arginine (R) residues 972 and 973 (R972/973), and its oncogenic function in MLL-r ALL cells is FLT3 methylation dependent. Both biochemistry and computational analysis demonstrate that R972/973 methylation could facilitate recruitment of adaptor proteins to FLT3 in a phospho-tyrosine (Y) residue 969 (Y969) dependent or independent manner. Cells expressing R972/973 methylation-deficient FLT3 exhibited more robust apoptosis and growth inhibition than did Y969 phosphorylation-deficient FLT3-transduced cells. We also show that the capacity of the type I PRMT inhibitor MS023 to inhibit leukemia cell viability parallels baseline FLT3 R972/973 methylation levels. Finally, combining FLT3 tyrosine kinase inhibitor PKC412 with MS023 treatment enhanced elimination of MLL-r ALL cells relative to PKC412 treatment alone in patient-derived mouse xenografts. These results indicate that abolishing FLT3 arginine methylation through PRMT1 inhibition represents a promising strategy to target MLL-r ALL cells.
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Clinical Effect of CD25 on the Prognosis of Diffuse Large B Cell Lymphoma with Secondary Central Nervous System Relapse. Pathol Oncol Res 2019; 26:1843-1850. [PMID: 31768966 DOI: 10.1007/s12253-019-00778-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/16/2019] [Accepted: 11/10/2019] [Indexed: 10/25/2022]
Abstract
In the present study, we investigated the effects of immunophenotyping on prognosis of diffuse large B cell lymphoma (DLBCL) with central nervous system (CNS) relapse treated with rituximab-CHOP (R-CHOP). CNS relapse occurred in 9.5% of DLBCL patients. At the diagnosis of DLBCL, CD25 was detected in 14.3% of cases. CD25 positivity correlated with an advanced stage, higher R-IPI, higher CNS-IPI, the presence of B symptoms, the presence of extranodal involvement >1, and bone involvement. Moreover CNS relapse was more frequently observed in patients with CD25+ than in those with CD25-. The univariate analysis showed that an advanced stage, high-risk R-IPI, high-risk CNS-IPI, bone involvement, and CD25+ were associated with shorter overall survival (OS). The multivariate analysis confirmed that CD25+ and high-risk CNS-IPI were independent adverse prognostic factors for shorter OS. A Kaplan-Meier analysis revealed the potential of CD25+ as a prognostic factor in patients with CNS relapse and that it correlated with shorter survival. The present results showed that the expression of CD25 in DLBCL patients with CNS relapse was associated with the patient prognosis independent other prognostic factors. The establishment of a treatment strategy for CNS relapse patients with CD25+ DLBCL cells is needed to improve poor outcomes.
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31
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Hurtz C, Chan LN, Geng H, Ballabio E, Xiao G, Deb G, Khoury H, Chen CW, Armstrong SA, Chen J, Ernst P, Melnick A, Milne T, Müschen M. Rationale for targeting BCL6 in MLL-rearranged acute lymphoblastic leukemia. Genes Dev 2019; 33:1265-1279. [PMID: 31395741 PMCID: PMC6719625 DOI: 10.1101/gad.327593.119] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2019] [Accepted: 07/02/2019] [Indexed: 12/27/2022]
Abstract
Chromosomal rearrangements of the mixed lineage leukemia (MLL) gene occur in ∼10% of B-cell acute lymphoblastic leukemia (B-ALL) and define a group of patients with dismal outcomes. Immunohistochemical staining of bone marrow biopsies from most of these patients revealed aberrant expression of BCL6, a transcription factor that promotes oncogenic B-cell transformation and drug resistance in B-ALL. Our genetic and ChIP-seq (chromatin immunoprecipitation [ChIP] combined with high-throughput sequencing) analyses showed that MLL-AF4 and MLL-ENL fusions directly bound to the BCL6 promoter and up-regulated BCL6 expression. While oncogenic MLL fusions strongly induced aberrant BCL6 expression in B-ALL cells, germline MLL was required to up-regulate Bcl6 in response to physiological stimuli during normal B-cell development. Inducible expression of Bcl6 increased MLL mRNA levels, which was reversed by genetic deletion and pharmacological inhibition of Bcl6, suggesting a positive feedback loop between MLL and BCL6. Highlighting the central role of BCL6 in MLL-rearranged B-ALL, conditional deletion and pharmacological inhibition of BCL6 compromised leukemogenesis in transplant recipient mice and restored sensitivity to vincristine chemotherapy in MLL-rearranged B-ALL patient samples. Oncogenic MLL fusions strongly induced transcriptional activation of the proapoptotic BH3-only molecule BIM, while BCL6 was required to curb MLL-induced expression of BIM. Notably, peptide (RI-BPI) and small molecule (FX1) BCL6 inhibitors derepressed BIM and synergized with the BH3-mimetic ABT-199 in eradicating MLL-rearranged B-ALL cells. These findings uncover MLL-dependent transcriptional activation of BCL6 as a previously unrecognized requirement of malignant transformation by oncogenic MLL fusions and identified BCL6 as a novel target for the treatment of MLL-rearranged B-ALL.
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Affiliation(s)
- Christian Hurtz
- Department of Systems Biology, City of Hope Comprehensive Cancer Center, Monrovia, California 91016, USA.,Department of Laboratory Medicine, University of California at San Francisco, San Francisco, California 94143, USA
| | - Lai N Chan
- Department of Systems Biology, City of Hope Comprehensive Cancer Center, Monrovia, California 91016, USA.,Department of Laboratory Medicine, University of California at San Francisco, San Francisco, California 94143, USA
| | - Huimin Geng
- Department of Systems Biology, City of Hope Comprehensive Cancer Center, Monrovia, California 91016, USA.,Department of Laboratory Medicine, University of California at San Francisco, San Francisco, California 94143, USA
| | - Erica Ballabio
- Medical Research Council (MRC) Molecular Haematology Unit, Weatherall Institute of Molecular Medicine, University of Oxford, Oxford OX3 9DS, United Kingdom
| | - Gang Xiao
- Department of Systems Biology, City of Hope Comprehensive Cancer Center, Monrovia, California 91016, USA.,Department of Laboratory Medicine, University of California at San Francisco, San Francisco, California 94143, USA
| | - Gauri Deb
- Department of Systems Biology, City of Hope Comprehensive Cancer Center, Monrovia, California 91016, USA
| | - Haytham Khoury
- Department of Systems Biology, City of Hope Comprehensive Cancer Center, Monrovia, California 91016, USA
| | - Chun-Wei Chen
- Department of Systems Biology, City of Hope Comprehensive Cancer Center, Monrovia, California 91016, USA
| | - Scott A Armstrong
- Department of Pediatric Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, Massachusetts 02115, USA
| | - Jianjun Chen
- Department of Systems Biology, City of Hope Comprehensive Cancer Center, Monrovia, California 91016, USA
| | - Patricia Ernst
- Department of Pediatrics, University of Colorado, Denver, Colorado 80045, USA
| | - Ari Melnick
- Department of Medicine, Weill Cornell Medical College, New York, New York 10065, USA.,Department of Pharmacology, Weill Cornell Medical College, New York, New York 10065, USA
| | - Thomas Milne
- Medical Research Council (MRC) Molecular Haematology Unit, Weatherall Institute of Molecular Medicine, University of Oxford, Oxford OX3 9DS, United Kingdom
| | - Markus Müschen
- Department of Systems Biology, City of Hope Comprehensive Cancer Center, Monrovia, California 91016, USA.,Department of Laboratory Medicine, University of California at San Francisco, San Francisco, California 94143, USA
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32
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Hatzi K, Geng H, Doane AS, Meydan C, LaRiviere R, Cardenas M, Duy C, Shen H, Vidal MNC, Baslan T, Mohammad HP, Kruger RG, Shaknovich R, Haberman AM, Inghirami G, Lowe SW, Melnick AM. Histone demethylase LSD1 is required for germinal center formation and BCL6-driven lymphomagenesis. Nat Immunol 2019; 20:86-96. [PMID: 30538335 PMCID: PMC6294324 DOI: 10.1038/s41590-018-0273-1] [Citation(s) in RCA: 59] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2017] [Accepted: 10/31/2018] [Indexed: 01/03/2023]
Abstract
Germinal center (GC) B cells feature repression of many gene enhancers to establish their characteristic transcriptome. Here we show that conditional deletion of Lsd1 in GCs significantly impaired GC formation, associated with failure to repress immune synapse genes linked to GC exit, which are also direct targets of the transcriptional repressor BCL6. We found that BCL6 directly binds LSD1 and recruits it primarily to intergenic and intronic enhancers. Conditional deletion of Lsd1 suppressed GC hyperplasia caused by constitutive expression of BCL6 and significantly delayed BCL6-driven lymphomagenesis. Administration of catalytic inhibitors of LSD1 had little effect on GC formation or GC-derived lymphoma cells. Using a CRISPR-Cas9 domain screen, we found instead that the LSD1 Tower domain was critical for dependence on LSD1 in GC-derived B cells. These results indicate an essential role for LSD1 in the humoral immune response, where it modulates enhancer function by forming repression complexes with BCL6.
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Affiliation(s)
- Katerina Hatzi
- Department of Medicine, Division of Hematology & Medical Oncology, Weill Cornell Medicine, New York, NY, USA
- Cancer Biology and Genetics Program, Sloan-Kettering Institute, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Huimin Geng
- Department of Laboratory Medicine, University of California, San Francisco, San Francisco, CA, USA
| | - Ashley S Doane
- Department of Medicine, Division of Hematology & Medical Oncology, Weill Cornell Medicine, New York, NY, USA
- Institute for Computational Biomedicine, Dept. of Physiology and Biophysics, Weill Cornell Medicine, New York, NY, USA
| | - Cem Meydan
- Institute for Computational Biomedicine, Dept. of Physiology and Biophysics, Weill Cornell Medicine, New York, NY, USA
| | - Reed LaRiviere
- Department of Medicine, Division of Hematology & Medical Oncology, Weill Cornell Medicine, New York, NY, USA
| | - Mariano Cardenas
- Department of Medicine, Division of Hematology & Medical Oncology, Weill Cornell Medicine, New York, NY, USA
- High Throughput and Spectroscopy Resource Center, Rockefeller University, New York, NY, USA
| | - Cihangir Duy
- Department of Medicine, Division of Hematology & Medical Oncology, Weill Cornell Medicine, New York, NY, USA
| | - Hao Shen
- Department of Medicine, Division of Hematology & Medical Oncology, Weill Cornell Medicine, New York, NY, USA
| | - Maria Nieves Calvo Vidal
- Department of Medicine, Division of Hematology & Medical Oncology, Weill Cornell Medicine, New York, NY, USA
| | - Timour Baslan
- Cancer Biology and Genetics Program, Sloan-Kettering Institute, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Helai P Mohammad
- Cancer Epigenetics Department, GlaxoSmithKline, Collegeville, PA, USA
| | - Ryan G Kruger
- Cancer Epigenetics Department, GlaxoSmithKline, Collegeville, PA, USA
| | - Rita Shaknovich
- Department of Medicine, Division of Hematology & Medical Oncology, Weill Cornell Medicine, New York, NY, USA
- Cancer Genetics Incorporated, Rutherford, NJ, USA
| | - Ann M Haberman
- Department of Laboratory Medicine, Department of Immunobiology Yale University School of Medicine, New Haven, CT, USA
| | - Giorgio Inghirami
- Department of Pathology and Laboratory Medicine, Weill Cornell Medicine, New York, NY, USA
| | - Scott W Lowe
- Cancer Biology and Genetics Program, Sloan-Kettering Institute, Memorial Sloan Kettering Cancer Center, New York, NY, USA
- Howard Hughes Medical Institute, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Ari M Melnick
- Department of Medicine, Division of Hematology & Medical Oncology, Weill Cornell Medicine, New York, NY, USA.
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33
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Cheng H, Linhares BM, Yu W, Cardenas MG, Ai Y, Jiang W, Winkler A, Cohen S, Melnick A, MacKerell A, Cierpicki T, Xue F. Identification of Thiourea-Based Inhibitors of the B-Cell Lymphoma 6 BTB Domain via NMR-Based Fragment Screening and Computer-Aided Drug Design. J Med Chem 2018; 61:7573-7588. [PMID: 29969259 PMCID: PMC6334293 DOI: 10.1021/acs.jmedchem.8b00040] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Protein-protein interactions (PPI) between the transcriptional repressor B-cell lymphoma 6 (BCL6) BTB domain (BCL6BTB) and its corepressors have emerged as a promising target for anticancer therapeutics. However, identification of potent, drug-like inhibitors of BCL6BTB has remained challenging. Using NMR-based screening of a library of fragment-like small molecules, we have identified a thiourea compound (7CC5) that binds to BCL6BTB. From this hit, the application of computer-aided drug design (CADD), medicinal chemistry, NMR spectroscopy, and X-ray crystallography has yielded an inhibitor, 15f, that demonstrated over 100-fold improved potency for BCL6BTB. This gain in potency was achieved by a unique binding mode that mimics the binding mode of the corepressor SMRT in the aromatic and the HDCH sites. The structure-activity relationship based on these new inhibitors will have a significant impact on the rational design of novel BCL6 inhibitors, facilitating the identification of therapeutics for the treatment of BCL6-dependent tumors.
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Affiliation(s)
- Huimin Cheng
- University of Maryland, School of Pharmacy, Department of Pharmaceutical Sciences, Baltimore, Maryland, 21201, USA
| | - Brian M. Linhares
- University of Michigan, Department of Pathology, Ann Arbor, Michigan, 48109, USA
| | - Wenbo Yu
- University of Maryland, School of Pharmacy, Department of Pharmaceutical Sciences, Baltimore, Maryland, 21201, USA,University of Maryland Computer-Aided Drug Design Center, Baltimore, Maryland, 21201, USA
| | - Mariano G. Cardenas
- Weill Cornell Medical College, Department of Hematology/Oncology, New York, New York, 10021, USA
| | - Yong Ai
- University of Maryland, School of Pharmacy, Department of Pharmaceutical Sciences, Baltimore, Maryland, 21201, USA
| | - Wenjuan Jiang
- University of Maryland, School of Pharmacy, Department of Pharmaceutical Sciences, Baltimore, Maryland, 21201, USA,University of Maryland Computer-Aided Drug Design Center, Baltimore, Maryland, 21201, USA
| | - Alyssa Winkler
- University of Michigan, Department of Pathology, Ann Arbor, Michigan, 48109, USA
| | - Sandra Cohen
- Weill Cornell Medical College, Department of Hematology/Oncology, New York, New York, 10021, USA
| | - Ari Melnick
- Weill Cornell Medical College, Department of Hematology/Oncology, New York, New York, 10021, USA
| | - Alexander MacKerell
- University of Maryland, School of Pharmacy, Department of Pharmaceutical Sciences, Baltimore, Maryland, 21201, USA,University of Maryland Computer-Aided Drug Design Center, Baltimore, Maryland, 21201, USA
| | - Tomasz Cierpicki
- University of Michigan, Department of Pathology, Ann Arbor, Michigan, 48109, USA,Correspondence to: Professor Fengtian Xue at the Department of Pharmaceutical Sciences, University of Maryland School of Pharmacy, 20 Penn Street, Baltimore, Maryland 21201, USA, Phone: 410-706-8521, , Professor Tomasz Cierpicki at the University of Michigan, Department of Pathology, Ann Arbor, Michigan 48109, USA, Phone: 734-615-9324,
| | - Fengtian Xue
- University of Maryland, School of Pharmacy, Department of Pharmaceutical Sciences, Baltimore, Maryland, 21201, USA,University of Maryland Computer-Aided Drug Design Center, Baltimore, Maryland, 21201, USA,Correspondence to: Professor Fengtian Xue at the Department of Pharmaceutical Sciences, University of Maryland School of Pharmacy, 20 Penn Street, Baltimore, Maryland 21201, USA, Phone: 410-706-8521, , Professor Tomasz Cierpicki at the University of Michigan, Department of Pathology, Ann Arbor, Michigan 48109, USA, Phone: 734-615-9324,
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34
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Roolf C, Richter A, Konkolefski C, Knuebel G, Sekora A, Krohn S, Stenzel J, Krause BJ, Vollmar B, Murua Escobar H, Junghanss C. Decitabine demonstrates antileukemic activity in B cell precursor acute lymphoblastic leukemia with MLL rearrangements. J Hematol Oncol 2018; 11:62. [PMID: 29728108 PMCID: PMC5936021 DOI: 10.1186/s13045-018-0607-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2018] [Accepted: 04/26/2018] [Indexed: 01/05/2023] Open
Abstract
Background Promotor hypermethylation of CpG islands is common in B cell precursor acute lymphoblastic leukemia (BCP-ALL) with mixed lineage leukemia (MLL) gene rearrangements. Hypomethylating agents (HMA) such as azacitidine (AZA) and decitabine (DEC) reduce DNA hypermethylation by incorporation into DNA and were successfully introduced into the clinic for the treatment of myeloid neoplasias. Methods Here, we investigated whether HMA induce comparable biological effects in MLL-positive BCP-ALL. Further, efficacy of HMA and concomitant application of cytostatic drugs (cytarabine and doxorubicin) were evaluated on established SEM and RS4;11 cell lines. In addition, promising approaches were studied on BCP-ALL cell line- and patient-derived xenograft models. Results In general, DEC effects were stronger compared to AZA on MLL-positive BCP-ALL cells. DEC significantly reduced proliferation by induction of cell cycle arrest in G0/G1 phase and apoptosis. Most sensitive to HMA were SEM cells which are characterized by a fast cell doubling time. The combination of low-dose HMA and conventional cytostatic agents revealed a heterogeneous response pattern. The strongest antiproliferative effects were observed when ALL cells were simultaneously exposed to HMA and cytostatic drugs. Most potent synergistic effects of HMA were induced with cytarabine. Finally, the therapeutic potential of DEC was evaluated on BCP-ALL xenograft models. DEC significantly delayed leukemic proliferation in xenograft models as demonstrated longitudinally by non-invasive bioluminescence as well as 18F-FDG-PET/CT imaging. Unexpectedly, in vivo concomitant application of DEC and cytarabine did not enhance the antiproliferative effect compared to DEC monotherapy. Conclusions Our data reveal that DEC is active in MLL-positive BCP-ALL and warrant clinical evaluation. Electronic supplementary material The online version of this article (10.1186/s13045-018-0607-3) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- C Roolf
- Department of Medicine, Clinic III - Hematology, Oncology, Palliative Medicine, Rostock University Medical Center, Ernst-Heydemann-Str. 6, 18057, Rostock, Germany
| | - A Richter
- Department of Medicine, Clinic III - Hematology, Oncology, Palliative Medicine, Rostock University Medical Center, Ernst-Heydemann-Str. 6, 18057, Rostock, Germany
| | - C Konkolefski
- Department of Medicine, Clinic III - Hematology, Oncology, Palliative Medicine, Rostock University Medical Center, Ernst-Heydemann-Str. 6, 18057, Rostock, Germany
| | - G Knuebel
- Department of Medicine, Clinic III - Hematology, Oncology, Palliative Medicine, Rostock University Medical Center, Ernst-Heydemann-Str. 6, 18057, Rostock, Germany
| | - A Sekora
- Department of Medicine, Clinic III - Hematology, Oncology, Palliative Medicine, Rostock University Medical Center, Ernst-Heydemann-Str. 6, 18057, Rostock, Germany
| | - S Krohn
- Department of Medicine, Clinic III - Hematology, Oncology, Palliative Medicine, Rostock University Medical Center, Ernst-Heydemann-Str. 6, 18057, Rostock, Germany
| | - J Stenzel
- Department of Nuclear Medicine, Rostock University Medical Center, University of Rostock, Gertrudenplatz 1, 18057, Rostock, Germany
| | - B J Krause
- Department of Nuclear Medicine, Rostock University Medical Center, University of Rostock, Gertrudenplatz 1, 18057, Rostock, Germany
| | - B Vollmar
- Institute of Experimental Surgery, Rostock University Medical Center, University of Rostock, Schillingallee 69a, 18057, Rostock, Germany
| | - H Murua Escobar
- Department of Medicine, Clinic III - Hematology, Oncology, Palliative Medicine, Rostock University Medical Center, Ernst-Heydemann-Str. 6, 18057, Rostock, Germany
| | - C Junghanss
- Department of Medicine, Clinic III - Hematology, Oncology, Palliative Medicine, Rostock University Medical Center, Ernst-Heydemann-Str. 6, 18057, Rostock, Germany.
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35
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Montaño A, Forero-Castro M, Marchena-Mendoza D, Benito R, Hernández-Rivas JM. New Challenges in Targeting Signaling Pathways in Acute Lymphoblastic Leukemia by NGS Approaches: An Update. Cancers (Basel) 2018; 10:cancers10040110. [PMID: 29642462 PMCID: PMC5923365 DOI: 10.3390/cancers10040110] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2018] [Revised: 04/03/2018] [Accepted: 04/05/2018] [Indexed: 12/18/2022] Open
Abstract
The identification and study of genetic alterations involved in various signaling pathways associated with the pathogenesis of acute lymphoblastic leukemia (ALL) and the application of recent next-generation sequencing (NGS) in the identification of these lesions not only broaden our understanding of the involvement of various genetic alterations in the pathogenesis of the disease but also identify new therapeutic targets for future clinical trials. The present review describes the main deletions, amplifications, sequence mutations, epigenetic lesions, and new structural DNA rearrangements detected by NGS in B-ALL and T-ALL and their clinical importance for therapeutic procedures. We reviewed the molecular basis of pathways including transcriptional regulation, lymphoid differentiation and development, TP53 and the cell cycle, RAS signaling, JAK/STAT, NOTCH, PI3K/AKT/mTOR, Wnt/β-catenin signaling, chromatin structure modifiers, and epigenetic regulators. The implementation of NGS strategies has enabled important mutated genes in each pathway, their associations with the genetic subtypes of ALL, and their outcomes, which will be described further. We also discuss classic and new cryptic DNA rearrangements in ALL identified by mRNA-seq strategies. Novel cooperative abnormalities in ALL could be key prognostic and/or predictive biomarkers for selecting the best frontline treatment and for developing therapies after the first relapse or refractory disease.
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Affiliation(s)
- Adrián Montaño
- IBSAL, IBMCC, Universidad de Salamanca-CSIC, Cancer Research Center, 37007 Salamanca, Spain.
| | - Maribel Forero-Castro
- Escuela de Ciencias Biológicas, Grupo de investigación en Ciencias Biomédicas (GICBUPTC), Universidad Pedagógica y Tecnológica de Colombia, Tunja 150001, Colombia.
| | - Darnel Marchena-Mendoza
- IBSAL, IBMCC, Universidad de Salamanca-CSIC, Cancer Research Center, 37007 Salamanca, Spain.
- Escuela de Ciencias Biológicas, Grupo de investigación en Ciencias Biomédicas (GICBUPTC), Universidad Pedagógica y Tecnológica de Colombia, Tunja 150001, Colombia.
| | - Rocío Benito
- IBSAL, IBMCC, Universidad de Salamanca-CSIC, Cancer Research Center, 37007 Salamanca, Spain.
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36
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Wang SJ, Wang PZ, Gale RP, Qin YZ, Liu YR, Lai YY, Jiang H, Jiang Q, Zhang XH, Jiang B, Xu LP, Huang XJ, Liu KY, Ruan GR. Cysteine and glycine-rich protein 2 (CSRP2) transcript levels correlate with leukemia relapse and leukemia-free survival in adults with B-cell acute lymphoblastic leukemia and normal cytogenetics. Oncotarget 2018; 8:35984-36000. [PMID: 28415593 PMCID: PMC5482632 DOI: 10.18632/oncotarget.16416] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2016] [Accepted: 03/11/2017] [Indexed: 12/14/2022] Open
Abstract
Relapse is the major cause of treatment-failure in adults with B-cell acute lymphoblastic leukemia (ALL) achieving complete remission after induction chemotherapy. Greater precision identifying persons likely to relapse is important. We did bio-informatics analyses of transcriptomic data to identify mRNA transcripts aberrantly-expressed in B-cell ALL. We selected 9 candidate genes for validation 7 of which proved significantly-associated with B-cell ALL. We next focused on function and clinical correlations of the cysteine and glycine-rich protein 2 (CSRP2). Quantitative real-time polymerase chain reaction (RT-qPCR) was used to examine gene transcript levels in bone marrow samples from 236 adults with B-cell ALL compared with samples from normals. CSRP2 was over-expressed in 228 out of 236 adults (97%) with newly-diagnosed B-cell ALL. A prognostic value was assessed in 168 subjects. In subjects with normal cytogenetics those with high CSRP2 transcript levels had a higher 5-year cumulative incidence of relapse (CIR) and worse relapse-free survival (RFS) compared with subjects with low transcript levels (56% [95% confidence interval, 53, 59%] vs. 19% [18, 20%]; P = 0.011 and 41% [17, 65%] vs. 80% [66–95%]; P = 0.007). In multivariate analyses a high CSRP2 transcript level was independently-associated with CIR (HR = 5.32 [1.64–17.28]; P = 0.005) and RFS (HR = 5.56 [1.87, 16.53]; P = 0.002). Functional analyses indicated CSRP2 promoted cell proliferation, cell-cycle progression, in vitro colony formation and cell migration ability. Abnormal CSRP2 expression was associated with resistance to chemotherapy; sensitivity was restored by down-regulating CSRP2 expression.
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Affiliation(s)
- Shu-Juan Wang
- Peking University People's Hospital and Institute of Hematology, Beijing Key Laboratory of Hematopoietic Stem Cell Transplantation, Beijing, China
| | - Ping-Zhang Wang
- Department of Immunology, School of Basic Medical Sciences, Peking University Health Science Center, Key Laboratory of Medical Immunology, Ministry of Health, China, Peking University Center for Human Disease Genomics, Beijing, China
| | - Robert Peter Gale
- Hematology Research Center, Division of Experimental Medicine, Department of Medicine, Imperial College London, London, UK
| | - Ya-Zhen Qin
- Peking University People's Hospital and Institute of Hematology, Beijing Key Laboratory of Hematopoietic Stem Cell Transplantation, Beijing, China
| | - Yan-Rong Liu
- Peking University People's Hospital and Institute of Hematology, Beijing Key Laboratory of Hematopoietic Stem Cell Transplantation, Beijing, China
| | - Yue-Yun Lai
- Peking University People's Hospital and Institute of Hematology, Beijing Key Laboratory of Hematopoietic Stem Cell Transplantation, Beijing, China
| | - Hao Jiang
- Peking University People's Hospital and Institute of Hematology, Beijing Key Laboratory of Hematopoietic Stem Cell Transplantation, Beijing, China
| | - Qian Jiang
- Peking University People's Hospital and Institute of Hematology, Beijing Key Laboratory of Hematopoietic Stem Cell Transplantation, Beijing, China
| | - Xiao-Hui Zhang
- Peking University People's Hospital and Institute of Hematology, Beijing Key Laboratory of Hematopoietic Stem Cell Transplantation, Beijing, China
| | - Bin Jiang
- Peking University People's Hospital and Institute of Hematology, Beijing Key Laboratory of Hematopoietic Stem Cell Transplantation, Beijing, China
| | - Lan-Ping Xu
- Peking University People's Hospital and Institute of Hematology, Beijing Key Laboratory of Hematopoietic Stem Cell Transplantation, Beijing, China
| | - Xiao-Jun Huang
- Peking University People's Hospital and Institute of Hematology, Beijing Key Laboratory of Hematopoietic Stem Cell Transplantation, Beijing, China.,Peking-Tsinghua Center for Life Sciences, Beijing, China
| | - Kai-Yan Liu
- Peking University People's Hospital and Institute of Hematology, Beijing Key Laboratory of Hematopoietic Stem Cell Transplantation, Beijing, China
| | - Guo-Rui Ruan
- Peking University People's Hospital and Institute of Hematology, Beijing Key Laboratory of Hematopoietic Stem Cell Transplantation, Beijing, China
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37
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Kachroo P, Szymczak S, Heinsen FA, Forster M, Bethune J, Hemmrich-Stanisak G, Baker L, Schrappe M, Stanulla M, Franke A. NGS-based methylation profiling differentiates TCF3-HLF and TCF3-PBX1 positive B-cell acute lymphoblastic leukemia. Epigenomics 2018; 10:133-147. [DOI: 10.2217/epi-2017-0080] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Aim: To determine whether methylation differences between mostly fatal TCF3-HLF and curable TCF3-PBX1 pediatric acute lymphoblastic leukemia subtypes can be associated with differential gene expression and remission. Materials & methods: Five (extremely rare) TCF3-HLF versus five (very similar) TCF3-PBX1 patients were sampled before and after remission and analyzed using reduced representation bisulfite sequencing and RNA-sequencing. Results: We identified 7000 differentially methylated CpG sites between subtypes, of which 78% had lower methylation levels in TCF3-HLF. Gene expression was negatively correlated with CpG sites in 23 genes. KBTBD11 clearly differed in methylation and expression between subtypes and before and after remission in TCF3-HLF samples. Conclusion: KBTBD11 hypomethylation may be a promising potential target for further experimental validation especially for the TCF3-HLF subtype.
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Affiliation(s)
- Priyadarshini Kachroo
- Institute of Clinical Molecular Biology, Christian Albrechts University of Kiel, Kiel 24105, Germany
- Channing Laboratory, Department of Medicine, Brigham & Women's Hospital & Harvard Medical School, Boston, MA 02115, USA
| | - Silke Szymczak
- Institute of Clinical Molecular Biology, Christian Albrechts University of Kiel, Kiel 24105, Germany
- Institute of Medical Informatics & Statistics, Christian Albrechts University of Kiel, Kiel 24105, Germany
| | - Femke-Anouska Heinsen
- Institute of Clinical Molecular Biology, Christian Albrechts University of Kiel, Kiel 24105, Germany
| | - Michael Forster
- Institute of Clinical Molecular Biology, Christian Albrechts University of Kiel, Kiel 24105, Germany
| | - Jörn Bethune
- Institute of Clinical Molecular Biology, Christian Albrechts University of Kiel, Kiel 24105, Germany
| | - Georg Hemmrich-Stanisak
- Institute of Clinical Molecular Biology, Christian Albrechts University of Kiel, Kiel 24105, Germany
| | - Lewis Baker
- Department of Applied Mathematics, University of Colorado, Boulder, CO 80309, USA
| | - Martin Schrappe
- Department of Pediatrics, University Hospital Schleswig-Holstein, Campus Kiel, Kiel 24105, Germany
| | - Martin Stanulla
- Pediatric Hematology & Oncology, Hannover Medical School, Hannover 30625, Germany
| | - Andre Franke
- Institute of Clinical Molecular Biology, Christian Albrechts University of Kiel, Kiel 24105, Germany
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38
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Affiliation(s)
- Rebecca J Leeman-Neill
- Department of Pathology and Cell Biology, Columbia University Medical Center, New York, USA
| | - Govind Bhagat
- Department of Pathology and Cell Biology, Columbia University Medical Center, New York, USA
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39
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Boullosa LF, Savaliya P, Bonney S, Orchard L, Wickenden H, Lee C, Smits E, Banham AH, Mills KI, Orchard K, Guinn BA. Identification of survivin as a promising target for the immunotherapy of adult B-cell acute lymphoblastic leukemia. Oncotarget 2017; 9:3853-3866. [PMID: 29423088 PMCID: PMC5790505 DOI: 10.18632/oncotarget.23380] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2017] [Accepted: 11/26/2017] [Indexed: 12/14/2022] Open
Abstract
B-cell acute lymphoblastic leukemia (B-ALL) is a rare heterogeneous disease characterized by a block in lymphoid differentiation and a rapid clonal expansion of immature, non-functioning B cells. Adult B-ALL patients have a poor prognosis with less than 50% chance of survival after five years and a high relapse rate after allogeneic haematopoietic stem cell transplantation. Novel treatment approaches are required to improve the outcome for patients and the identification of B-ALL specific antigens are essential for the development of targeted immunotherapeutic treatments. We examined twelve potential target antigens for the immunotherapy of adult B-ALL. RT-PCR indicated that only survivin and WT1 were expressed in B-ALL patient samples (7/11 and 6/11, respectively) but not normal donor control samples (0/8). Real-time quantitative (RQ)-PCR showed that survivin was the only antigen whose transcript exhibited significantly higher expression in the B-ALL samples (n = 10) compared with healthy controls (n = 4)(p = 0.015). Immunolabelling detected SSX2, SSX2IP, survivin and WT1 protein expression in all ten B-ALL samples examined, but survivin was not detectable in healthy volunteer samples. To determine whether these findings were supported by the analyses of a larger cohort of patient samples, we performed metadata analysis on an already published microarray dataset. We found that only survivin was significantly over-expressed in B-ALL patients (n = 215) compared to healthy B-cell controls (n = 12)(p = 0.013). We have shown that survivin is frequently transcribed and translated in adult B-ALL, but not healthy donor samples, suggesting this may be a promising target patient group for survivin-mediated immunotherapy.
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Affiliation(s)
- Laurie Freire Boullosa
- School of Life Sciences - Biomedical Science Subject Group, University of Hull, Hull, HU7 6RX, UK.,Centre for Oncological Research, University of Antwerp, 2610 Antwerp, Belgium
| | - Payalben Savaliya
- Department of Life Sciences, University of Bedfordshire, Park Square, Luton, LU1 3JU, UK
| | - Stephanie Bonney
- Cancer Sciences Unit, Somers Cancer Sciences Building, University of Southampton, Southampton SO16 6YD, UK
| | - Laurence Orchard
- Cancer Sciences Unit, Somers Cancer Sciences Building, University of Southampton, Southampton SO16 6YD, UK
| | - Hannah Wickenden
- Cancer Sciences Unit, Somers Cancer Sciences Building, University of Southampton, Southampton SO16 6YD, UK
| | - Cindy Lee
- Cancer Sciences Unit, Somers Cancer Sciences Building, University of Southampton, Southampton SO16 6YD, UK.,Department of Haematology, University Hospital Southampton NHS Foundation Trust and University of Southampton, Southampton SO16 6YD, UK
| | - Evelien Smits
- Centre for Oncological Research, University of Antwerp, 2610 Antwerp, Belgium
| | - Alison H Banham
- Nuffield Division of Clinical Laboratory Sciences, Radcliffe Department of Medicine, University of Oxford, John Radcliffe Hospital, Headington, Oxford OX3 9DU, UK
| | - Ken I Mills
- Centre for Cancer Research and Cell Biology, Queens University Belfast, Belfast BT9 7AE, UK
| | - Kim Orchard
- Department of Haematology, University Hospital Southampton NHS Foundation Trust and University of Southampton, Southampton SO16 6YD, UK
| | - Barbara-Ann Guinn
- School of Life Sciences - Biomedical Science Subject Group, University of Hull, Hull, HU7 6RX, UK.,Department of Life Sciences, University of Bedfordshire, Park Square, Luton, LU1 3JU, UK.,Cancer Sciences Unit, Somers Cancer Sciences Building, University of Southampton, Southampton SO16 6YD, UK
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40
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Kerry J, Godfrey L, Repapi E, Tapia M, Blackledge NP, Ma H, Ballabio E, O'Byrne S, Ponthan F, Heidenreich O, Roy A, Roberts I, Konopleva M, Klose RJ, Geng H, Milne TA. MLL-AF4 Spreading Identifies Binding Sites that Are Distinct from Super-Enhancers and that Govern Sensitivity to DOT1L Inhibition in Leukemia. Cell Rep 2017; 18:482-495. [PMID: 28076791 PMCID: PMC5263239 DOI: 10.1016/j.celrep.2016.12.054] [Citation(s) in RCA: 57] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2016] [Revised: 10/31/2016] [Accepted: 12/16/2016] [Indexed: 01/16/2023] Open
Abstract
Understanding the underlying molecular mechanisms of defined cancers is crucial for effective personalized therapies. Translocations of the mixed-lineage leukemia (MLL) gene produce fusion proteins such as MLL-AF4 that disrupt epigenetic pathways and cause poor-prognosis leukemias. Here, we find that at a subset of gene targets, MLL-AF4 binding spreads into the gene body and is associated with the spreading of Menin binding, increased transcription, increased H3K79 methylation (H3K79me2/3), a disruption of normal H3K36me3 patterns, and unmethylated CpG regions in the gene body. Compared to other H3K79me2/3 marked genes, MLL-AF4 spreading gene expression is downregulated by inhibitors of the H3K79 methyltransferase DOT1L. This sensitivity mediates synergistic interactions with additional targeted drug treatments. Therefore, epigenetic spreading and enhanced susceptibility to epidrugs provides a potential marker for better understanding combination therapies in humans. MLL-AF4 binding requires an unmethylated CpG (uCpG) island and Menin MLL-AF4 and Menin can spread into the gene body of some targets Spreading targets are highly transcribed and have an aberrant chromatin signature Spreading of MLL-AF4 is a predictor of sensitivity to DOT1L inhibitors
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Affiliation(s)
- Jon Kerry
- MRC, Molecular Haematology Unit, NIHR Oxford Biomedical Research Centre Programme, University of Oxford, John Radcliffe Hospital, Oxford OX3 9DS, UK
| | - Laura Godfrey
- MRC, Molecular Haematology Unit, NIHR Oxford Biomedical Research Centre Programme, University of Oxford, John Radcliffe Hospital, Oxford OX3 9DS, UK
| | - Emmanouela Repapi
- Computational Biology Research Group, Weatherall Institute of Molecular Medicine, University of Oxford, John Radcliffe Hospital, Oxford OX3 9DS, UK
| | - Marta Tapia
- MRC, Molecular Haematology Unit, NIHR Oxford Biomedical Research Centre Programme, University of Oxford, John Radcliffe Hospital, Oxford OX3 9DS, UK
| | - Neil P Blackledge
- Laboratory of Chromatin Biology and Transcription, Department of Biochemistry, University of Oxford, Oxford OX1 3QU, UK
| | - Helen Ma
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Erica Ballabio
- MRC, Molecular Haematology Unit, NIHR Oxford Biomedical Research Centre Programme, University of Oxford, John Radcliffe Hospital, Oxford OX3 9DS, UK
| | - Sorcha O'Byrne
- Department of Paediatrics, University of Oxford, Children's Hospital, John Radcliffe, Oxford OX3 9DU, UK
| | - Frida Ponthan
- Wolfson Childhood Cancer Research Centre, Northern Institute for Cancer Research, Newcastle University, Newcastle Upon Tyne NE1 7RU, UK
| | - Olaf Heidenreich
- Wolfson Childhood Cancer Research Centre, Northern Institute for Cancer Research, Newcastle University, Newcastle Upon Tyne NE1 7RU, UK
| | - Anindita Roy
- Department of Paediatrics, University of Oxford, Children's Hospital, John Radcliffe, Oxford OX3 9DU, UK
| | - Irene Roberts
- MRC, Molecular Haematology Unit, NIHR Oxford Biomedical Research Centre Programme, University of Oxford, John Radcliffe Hospital, Oxford OX3 9DS, UK; Department of Paediatrics, University of Oxford, Children's Hospital, John Radcliffe, Oxford OX3 9DU, UK
| | - Marina Konopleva
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Robert J Klose
- Laboratory of Chromatin Biology and Transcription, Department of Biochemistry, University of Oxford, Oxford OX1 3QU, UK
| | - Huimin Geng
- Department of Laboratory Medicine, University of California, San Francisco, San Francisco, CA 94143, USA
| | - Thomas A Milne
- MRC, Molecular Haematology Unit, NIHR Oxford Biomedical Research Centre Programme, University of Oxford, John Radcliffe Hospital, Oxford OX3 9DS, UK.
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41
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Ferrando AA, López-Otín C. Clonal evolution in leukemia. Nat Med 2017; 23:1135-1145. [PMID: 28985206 DOI: 10.1038/nm.4410] [Citation(s) in RCA: 71] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2016] [Accepted: 07/26/2017] [Indexed: 02/06/2023]
Abstract
Human leukemias are liquid malignancies characterized by diffuse infiltration of the bone marrow by transformed hematopoietic progenitors. The accessibility of tumor cells obtained from peripheral blood or through bone marrow aspirates, together with recent advances in cancer genomics and single-cell molecular analysis, have facilitated the study of clonal populations and their genetic and epigenetic evolution over time with unprecedented detail. The results of these analyses challenge the classic view of leukemia as a clonal homogeneous diffuse tumor and introduce a more complex and dynamic scenario. In this review, we present current concepts on the role of clonal evolution in lymphoid and myeloid leukemia as a driver of tumor initiation, disease progression and relapse. We also discuss the implications of these concepts in our understanding of the evolutionary mechanisms involved in leukemia transformation and therapy resistance.
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Affiliation(s)
- Adolfo A Ferrando
- Department of Pediatrics, Columbia University, New York, New York, USA
- Department of Pathology and Cell Biology, Columbia University, New York, New York, USA
- Institute for Cancer Genetics, Columbia University, New York, New York, USA
| | - Carlos López-Otín
- Departamento de Bioquímica y Biología Molecular, Facultad de Medicina, Instituto Universitario de Oncología (IUOPA), Universidad de Oviedo, Oviedo, Spain
- Centro de Investigación Biomédica en Red de Cáncer, Spain
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42
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Flynn MJ, Hartley JA. The emerging role of anti-CD25 directed therapies as both immune modulators and targeted agents in cancer. Br J Haematol 2017; 179:20-35. [PMID: 28556984 DOI: 10.1111/bjh.14770] [Citation(s) in RCA: 66] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
CD25 (also termed IL2RA) forms one component of the high-affinity heterotrimeric interleukin 2 (IL2) receptor on activated T cells. Its affinity for IL2 and cellular function are tightly regulated and vary in different cell types. The high frequency of CD25 on the surface of many different haematological tumour cells is now well established and, apart from its prognostic significance, CD25 may be present on leukaemic stem cells and enable oncogenic signalling pathways in leukaemic cells. Additionally, high CD25 expression in activated circulating immune cells and Tregs is a factor that has already been exploited by IL2 immunotherapies for treatment of tumours and autoimmune disease. The relative clinical safety and efficacy of administering anti-CD25 radioimmunoconjugates and immunotoxins in various haematological tumour indications has been established and clinical trials of a novel CD25-directed antibody drug conjugate are underway.
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43
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Sadras T, Heatley SL, Kok CH, Dang P, Galbraith KM, McClure BJ, Muskovic W, Venn NC, Moore S, Osborn M, Revesz T, Moore AS, Hughes TP, Yeung D, Sutton R, White DL. Differential expression of MUC4, GPR110 and IL2RA defines two groups of CRLF2-rearranged acute lymphoblastic leukemia patients with distinct secondary lesions. Cancer Lett 2017; 408:92-101. [PMID: 28866095 DOI: 10.1016/j.canlet.2017.08.034] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2017] [Revised: 08/15/2017] [Accepted: 08/24/2017] [Indexed: 12/26/2022]
Abstract
CRLF2-rearrangements (CRLF2-r) occur frequently in Ph-like B-ALL, a high-risk ALL sub-type characterized by a signaling profile similar to Ph + ALL, however accumulating evidence indicates genetic heterogeneity within CRLF2-r ALL. We performed thorough genomic characterization of 35 CRLF2-r cases (P2RY8-CRLF2 n = 18; IGH-CRLF2 n = 17). Activating JAK2 mutations were present in 34% of patients, and a CRLF2-F232C mutation was identified in an additional 17%. IKZF1 deletions were detected in 63% of cases. The majority of patients (26/35) classified as Ph-like, and these were characterized by significantly higher levels of MUC4, GPR110 and IL2RA/CD25. In addition, Ph-like CRLF2-r samples were significantly enriched for IKZF1 deletions, JAK2/CRLF2 mutations and increased expression of JAK/STAT target genes (CISH, SOCS1), suggesting that mutation-driven CRLF2/JAK2 activation is more frequent in this sub-group. Less is known about the genomics of CRLF2-r cases lacking JAK2-pathway mutations, but KRAS/NRAS mutations were identified in 4/9 non-Ph-like samples. This work highlights the heterogeneity of secondary lesions which may arise and influence intracellular-pathway activation in CRLF2-r patients, and importantly presents distinct therapeutic targets within a group of patients harboring identical primary translocations, for whom efficient directed therapies are currently lacking.
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Affiliation(s)
- Teresa Sadras
- Cancer Theme, South Australian Health & Medical Research Institute, Adelaide, SA, Australia; Discipline of Medicine, University of Adelaide, Adelaide, SA, Australia
| | - Susan L Heatley
- Cancer Theme, South Australian Health & Medical Research Institute, Adelaide, SA, Australia; Discipline of Medicine, University of Adelaide, Adelaide, SA, Australia
| | - Chung H Kok
- Cancer Theme, South Australian Health & Medical Research Institute, Adelaide, SA, Australia; Discipline of Medicine, University of Adelaide, Adelaide, SA, Australia
| | - Phuong Dang
- Cancer Theme, South Australian Health & Medical Research Institute, Adelaide, SA, Australia
| | - Kate M Galbraith
- Cancer Theme, South Australian Health & Medical Research Institute, Adelaide, SA, Australia
| | - Barbara J McClure
- Cancer Theme, South Australian Health & Medical Research Institute, Adelaide, SA, Australia
| | - Walter Muskovic
- Molecular Diagnostics Program, Children's Cancer Institute, Lowy Cancer Research Centre, UNSW Sydney, NSW, Australia
| | - Nicola C Venn
- Molecular Diagnostics Program, Children's Cancer Institute, Lowy Cancer Research Centre, UNSW Sydney, NSW, Australia
| | - Sarah Moore
- Department of Genetic Pathology, SA Pathology, Adelaide, SA, Australia
| | - Michael Osborn
- SA Pathology at Women's & Children's Hospital, Adelaide, SA, Australia; Australian Genomic Health Alliance, Adelaide, SA, Australia
| | - Tamas Revesz
- SA Pathology at Women's & Children's Hospital, Adelaide, SA, Australia
| | - Andrew S Moore
- The University of Queensland Diamantina Institute, UQ Child Health Research Centre, The University of Queensland, Brisbane, QLD, Australia; Oncology Services Group, Children's Health Queensland Hospital and Health Service, Brisbane, QLD, Australia
| | - Timothy P Hughes
- Cancer Theme, South Australian Health & Medical Research Institute, Adelaide, SA, Australia; Discipline of Medicine, University of Adelaide, Adelaide, SA, Australia; Department of Haematology, SA Pathology, Adelaide, SA, Australia
| | - David Yeung
- Department of Haematology, SA Pathology, Adelaide, SA, Australia
| | - Rosemary Sutton
- Molecular Diagnostics Program, Children's Cancer Institute, Lowy Cancer Research Centre, UNSW Sydney, NSW, Australia; Australian Genomic Health Alliance, Adelaide, SA, Australia; School of Women's and Children's Health, Medicine, University of NSW, Sydney, NSW, Australia
| | - Deborah L White
- Cancer Theme, South Australian Health & Medical Research Institute, Adelaide, SA, Australia; Discipline of Medicine, University of Adelaide, Adelaide, SA, Australia; Australian Genomic Health Alliance, Adelaide, SA, Australia.
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44
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Chung C, Ma H. Driving Toward Precision Medicine for Acute Leukemias: Are We There Yet? Pharmacotherapy 2017; 37:1052-1072. [DOI: 10.1002/phar.1977] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
| | - Hilary Ma
- MD Anderson Cancer Center; Houston Texas
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45
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Bergmann AK, Castellano G, Alten J, Ammerpohl O, Kolarova J, Nordlund J, Martin-Subero JI, Schrappe M, Siebert R. DNA methylation profiling of pediatric B-cell lymphoblastic leukemia with KMT2A rearrangement identifies hypomethylation at enhancer sites. Pediatr Blood Cancer 2017; 64. [PMID: 27786413 DOI: 10.1002/pbc.26251] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/08/2016] [Revised: 07/15/2016] [Accepted: 08/01/2016] [Indexed: 02/03/2023]
Abstract
Deregulation of the epigenome is an important pathogenetic mechanism in acute lymphoblastic leukemia (ALL) with lysine (K)-specific methyltransferase 2A rearrangement (KMT2Ar). We performed array-based DNA methylation profiling of KMT2Ar ALL cells from 26 children in comparison to normal B-cell precursors. Significant changes in DNA methylation in KMT2Ar ALL were identified in 2,545 CpG loci, influenced by age and the translocation partners AFF1 and MLLT1. In KMT2Ar ALL, DNA methylation loss was enriched at enhancers and for certain transcription factor binding sites such as BCL11A, EBF, and MEF2A. In summary, DNA methylation changes in KMT2Ar ALL target enhancers, genes involved in leukemogenesis and normal hematopoiesis, as well as transcription factor networks.
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Affiliation(s)
- Anke K Bergmann
- Institute of Human Genetics, Christian-Albrechts-University Kiel & University Hospital Schleswig-Holstein, Campus Kiel, Kiel, Germany.,Department of Pediatrics, Christian-Albrechts-University Kiel & University Hospital Schleswig-Holstein, Campus Kiel, Kiel, Germany
| | - Giancarlo Castellano
- Departamento de Anatomía Patológica, Farmacología y Microbiología, Institutd'Investigacions Biomèdiques August Pi iSunyer (IDIBAPS), Universitat de Barcelona, Barcelona, Spain
| | - Julia Alten
- Department of Pediatrics, Christian-Albrechts-University Kiel & University Hospital Schleswig-Holstein, Campus Kiel, Kiel, Germany
| | - Ole Ammerpohl
- Institute of Human Genetics, Christian-Albrechts-University Kiel & University Hospital Schleswig-Holstein, Campus Kiel, Kiel, Germany
| | - Julia Kolarova
- Institute of Human Genetics, Christian-Albrechts-University Kiel & University Hospital Schleswig-Holstein, Campus Kiel, Kiel, Germany.,Institute of Human Genetics, University of Ulm & University Medical Center Ulm, Ulm, Germany
| | - Jessica Nordlund
- Department of Medical Sciences, Molecular Medicine and Science for Life Laboratory, Uppsala University, Sweden
| | - Jose Ignacio Martin-Subero
- Departamento de Anatomía Patológica, Farmacología y Microbiología, Institutd'Investigacions Biomèdiques August Pi iSunyer (IDIBAPS), Universitat de Barcelona, Barcelona, Spain
| | - Martin Schrappe
- Department of Pediatrics, Christian-Albrechts-University Kiel & University Hospital Schleswig-Holstein, Campus Kiel, Kiel, Germany
| | - Reiner Siebert
- Institute of Human Genetics, Christian-Albrechts-University Kiel & University Hospital Schleswig-Holstein, Campus Kiel, Kiel, Germany.,Institute of Human Genetics, University of Ulm & University Medical Center Ulm, Ulm, Germany
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MLL-AF9 and MLL-AF4 oncofusion proteins bind a distinct enhancer repertoire and target the RUNX1 program in 11q23 acute myeloid leukemia. Oncogene 2017; 36:3346-3356. [PMID: 28114278 PMCID: PMC5474565 DOI: 10.1038/onc.2016.488] [Citation(s) in RCA: 64] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2016] [Revised: 11/14/2016] [Accepted: 11/22/2016] [Indexed: 12/27/2022]
Abstract
In 11q23 leukemias, the N-terminal part of the mixed lineage leukemia (MLL) gene is fused to >60 different partner genes. In order to define a core set of MLL rearranged targets, we investigated the genome-wide binding of the MLL-AF9 and MLL-AF4 fusion proteins and associated epigenetic signatures in acute myeloid leukemia (AML) cell lines THP-1 and MV4-11. We uncovered both common as well as specific MLL-AF9 and MLL-AF4 target genes, which were all marked by H3K79me2, H3K27ac and H3K4me3. Apart from promoter binding, we also identified MLL-AF9 and MLL-AF4 binding at specific subsets of non-overlapping active distal regulatory elements. Despite this differential enhancer binding, MLL-AF9 and MLL-AF4 still direct a common gene program, which represents part of the RUNX1 gene program and constitutes of CD34+ and monocyte-specific genes. Comparing these data sets identified several zinc finger transcription factors (TFs) as potential MLL-AF9 co-regulators. Together, these results suggest that MLL fusions collaborate with specific subsets of TFs to deregulate the RUNX1 gene program in 11q23 AMLs.
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Jiang Y, Ortega-Molina A, Geng H, Ying HY, Hatzi K, Parsa S, McNally D, Wang L, Doane AS, Agirre X, Teater M, Meydan C, Li Z, Poloway D, Wang S, Ennishi D, Scott DW, Stengel KR, Kranz JE, Holson E, Sharma S, Young JW, Chu CS, Roeder RG, Shaknovich R, Hiebert SW, Gascoyne RD, Tam W, Elemento O, Wendel HG, Melnick AM. CREBBP Inactivation Promotes the Development of HDAC3-Dependent Lymphomas. Cancer Discov 2017; 7:38-53. [PMID: 27733359 PMCID: PMC5300005 DOI: 10.1158/2159-8290.cd-16-0975] [Citation(s) in RCA: 176] [Impact Index Per Article: 25.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2016] [Revised: 10/11/2016] [Accepted: 10/11/2016] [Indexed: 12/18/2022]
Abstract
Somatic mutations in CREBBP occur frequently in B-cell lymphoma. Here, we show that loss of CREBBP facilitates the development of germinal center (GC)-derived lymphomas in mice. In both human and murine lymphomas, CREBBP loss-of-function resulted in focal depletion of enhancer H3K27 acetylation and aberrant transcriptional silencing of genes that regulate B-cell signaling and immune responses, including class II MHC. Mechanistically, CREBBP-regulated enhancers are counter-regulated by the BCL6 transcriptional repressor in a complex with SMRT and HDAC3, which we found to bind extensively to MHC class II loci. HDAC3 loss-of-function rescued repression of these enhancers and corresponding genes, including MHC class II, and more profoundly suppressed CREBBP-mutant lymphomas in vitro and in vivo Hence, CREBBP loss-of-function contributes to lymphomagenesis by enabling unopposed suppression of enhancers by BCL6/SMRT/HDAC3 complexes, suggesting HDAC3-targeted therapy as a precision approach for CREBBP-mutant lymphomas. SIGNIFICANCE Our findings establish the tumor suppressor function of CREBBP in GC lymphomas in which CREBBP mutations disable acetylation and result in unopposed deacetylation by BCL6/SMRT/HDAC3 complexes at enhancers of B-cell signaling and immune response genes. Hence, inhibition of HDAC3 can restore the enhancer histone acetylation and may serve as a targeted therapy for CREBBP-mutant lymphomas. Cancer Discov; 7(1); 38-53. ©2016 AACR.See related commentary by Höpken, p. 14This article is highlighted in the In This Issue feature, p. 1.
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Affiliation(s)
- Yanwen Jiang
- Department of Medicine and Weill Cornell Cancer Center, Weill Cornell Medicine, New York, New York
- Institute for Computational Biomedicine, Weill Cornell Medical College, New York, New York
| | - Ana Ortega-Molina
- Cancer Biology and Genetics Program, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Huimin Geng
- Department of Laboratory Medicine, University of California, San Francisco, San Francisco, California
| | - Hsia-Yuan Ying
- Department of Medicine and Weill Cornell Cancer Center, Weill Cornell Medicine, New York, New York
| | - Katerina Hatzi
- Department of Medicine and Weill Cornell Cancer Center, Weill Cornell Medicine, New York, New York
- Cancer Biology and Genetics Program, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Sara Parsa
- Cancer Biology and Genetics Program, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Dylan McNally
- Department of Medicine and Weill Cornell Cancer Center, Weill Cornell Medicine, New York, New York
| | - Ling Wang
- Department of Medicine and Weill Cornell Cancer Center, Weill Cornell Medicine, New York, New York
| | - Ashley S Doane
- Institute for Computational Biomedicine, Weill Cornell Medical College, New York, New York
| | - Xabier Agirre
- Department of Medicine and Weill Cornell Cancer Center, Weill Cornell Medicine, New York, New York
- Area de Oncología, Centro de Investigación Médica Aplicada (CIMA), Universidad de Navarra, Pamplona, Spain
| | - Matt Teater
- Institute for Computational Biomedicine, Weill Cornell Medical College, New York, New York
| | - Cem Meydan
- Institute for Computational Biomedicine, Weill Cornell Medical College, New York, New York
| | - Zhuoning Li
- Department of Medicine and Weill Cornell Cancer Center, Weill Cornell Medicine, New York, New York
| | - David Poloway
- Department of Medicine and Weill Cornell Cancer Center, Weill Cornell Medicine, New York, New York
| | - Shenqiu Wang
- Cancer Biology and Genetics Program, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Daisuke Ennishi
- Centre for Lymphoid Cancer, British Columbia Cancer Agency, Vancouver, British Columbia, Canada
| | - David W Scott
- Centre for Lymphoid Cancer, British Columbia Cancer Agency, Vancouver, British Columbia, Canada
| | - Kristy R Stengel
- Department of Biochemistry, Vanderbilt University School of Medicine, Nashville, Tennessee
| | | | | | - Sneh Sharma
- Laboratory of Cellular Immunobiology, Division of Hematologic Oncology, Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, New York
| | - James W Young
- Laboratory of Cellular Immunobiology, Division of Hematologic Oncology, Department of Medicine, Memorial Sloan Kettering Cancer Center, Weill Cornell Medicine; The Rockefeller University, New York, New York
| | - Chi-Shuen Chu
- Laboratory of Biochemistry and Molecular Biology, The Rockefeller University, New York, New York
| | - Robert G Roeder
- Laboratory of Biochemistry and Molecular Biology, The Rockefeller University, New York, New York
| | | | - Scott W Hiebert
- Department of Biochemistry, Vanderbilt University School of Medicine, Nashville, Tennessee
| | - Randy D Gascoyne
- Centre for Lymphoid Cancer, British Columbia Cancer Agency, Vancouver, British Columbia, Canada
| | - Wayne Tam
- Department of Pathology and Laboratory Medicine, Weill Cornell Medicine, New York, New York
| | - Olivier Elemento
- Institute for Computational Biomedicine, Weill Cornell Medical College, New York, New York
| | - Hans-Guido Wendel
- Cancer Biology and Genetics Program, Memorial Sloan Kettering Cancer Center, New York, New York.
| | - Ari M Melnick
- Department of Medicine and Weill Cornell Cancer Center, Weill Cornell Medicine, New York, New York.
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Cardenas MG, Oswald E, Yu W, Xue F, MacKerell AD, Melnick AM. The Expanding Role of the BCL6 Oncoprotein as a Cancer Therapeutic Target. Clin Cancer Res 2016; 23:885-893. [PMID: 27881582 DOI: 10.1158/1078-0432.ccr-16-2071] [Citation(s) in RCA: 114] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2016] [Revised: 09/28/2016] [Accepted: 09/29/2016] [Indexed: 12/28/2022]
Abstract
BCL6 was initially discovered as an oncogene in B-cell lymphomas, where it drives the malignant phenotype by repressing proliferation and DNA damage checkpoints and blocking B-cell terminal differentiation. BCL6 mediates its effects by binding to hundreds of target genes and then repressing these genes by recruiting several different chromatin-modifying corepressor complexes. Structural characterization of BCL6-corepressor complexes suggested that BCL6 might be a druggable target. Accordingly, a number of compounds have been designed to bind to BCL6 and block corepressor recruitment. These compounds, based on peptide or small-molecule scaffolds, can potently block BCL6 repression of target genes and kill lymphoma cells. In the case of diffuse large B-cell lymphomas (DLBCL), BCL6 inhibitors are equally effective in suppressing both the germinal center B-cell (GCB)- and the more aggressive activated B-cell (ABC)-DLBCL subtypes, both of which require BCL6 to maintain their survival. In addition, BCL6 is implicated in an expanding scope of hematologic and solid tumors. These include, but are not limited to, B-acute lymphoblastic leukemia, chronic myeloid leukemia, breast cancer, and non-small cell lung cancer. BCL6 inhibitors have been shown to exert potent effects against these tumor types. Moreover, mechanism-based combinations of BCL6 inhibitors with other agents have yielded synergistic and often quite dramatic activity. Hence, there is a compelling case to accelerate the development of BCL6-targeted therapies for translation to the clinical setting. Clin Cancer Res; 23(4); 885-93. ©2016 AACR.
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Affiliation(s)
- Mariano G Cardenas
- Department of Hematology/Oncology, Weill Cornell Medicine, New York, New York
| | - Erin Oswald
- Department of Hematology/Oncology, Weill Cornell Medicine, New York, New York
| | - Wenbo Yu
- Department of Pharmaceutical Sciences, Computer-Aided Drug Design Center, School of Pharmacy, University of Maryland, Baltimore, Maryland
| | - Fengtian Xue
- Department of Pharmaceutical Sciences, Computer-Aided Drug Design Center, School of Pharmacy, University of Maryland, Baltimore, Maryland
| | - Alexander D MacKerell
- Department of Pharmaceutical Sciences, Computer-Aided Drug Design Center, School of Pharmacy, University of Maryland, Baltimore, Maryland
| | - Ari M Melnick
- Department of Hematology/Oncology, Weill Cornell Medicine, New York, New York.
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Godfrey L, Kerry J, Thorne R, Repapi E, Davies JOJ, Tapia M, Ballabio E, Hughes JR, Geng H, Konopleva M, Milne TA. MLL-AF4 binds directly to a BCL-2 specific enhancer and modulates H3K27 acetylation. Exp Hematol 2016; 47:64-75. [PMID: 27856324 PMCID: PMC5333536 DOI: 10.1016/j.exphem.2016.11.003] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2016] [Revised: 10/21/2016] [Accepted: 11/02/2016] [Indexed: 11/15/2022]
Abstract
Survival rates for children and adults carrying mutations in the Mixed Lineage Leukemia (MLL) gene continue to have a very poor prognosis. The most common MLL mutation in acute lymphoblastic leukemia is the t(4;11)(q21;q23) chromosome translocation that fuses MLL in-frame with the AF4 gene producing MLL-AF4 and AF4-MLL fusion proteins. Previously, we found that MLL-AF4 binds to the BCL-2 gene and directly activates it through DOT1L recruitment and increased H3K79me2/3 levels. In the study described here, we performed a detailed analysis of MLL-AF4 regulation of the entire BCL-2 family. By measuring nascent RNA production in MLL-AF4 knockdowns, we found that of all the BCL-2 family genes, MLL-AF4 directly controls the active transcription of both BCL-2 and MCL-1 and also represses BIM via binding of the polycomb group repressor 1 (PRC1) complex component CBX8. We further analyzed MLL-AF4 activation of the BCL-2 gene using Capture-C and identified a BCL-2-specific enhancer, consisting of two clusters of H3K27Ac at the 3' end of the gene. Loss of MLL-AF4 activity results in a reduction of H3K79me3 levels in the gene body and H3K27Ac levels at the 3' BCL-2 enhancer, revealing a novel regulatory link between these two histone marks and MLL-AF4-mediated activation of BCL-2.
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Affiliation(s)
- Laura Godfrey
- Weatherall Institute of Molecular Medicine, MRC Molecular Haematology Unit, University of Oxford, Headington, Oxford, UK
| | - Jon Kerry
- Weatherall Institute of Molecular Medicine, MRC Molecular Haematology Unit, University of Oxford, Headington, Oxford, UK
| | - Ross Thorne
- Weatherall Institute of Molecular Medicine, MRC Molecular Haematology Unit, University of Oxford, Headington, Oxford, UK
| | - Emmanouela Repapi
- Weatherall Institute of Molecular Medicine, Computational Biology Research Group, University of Oxford, Headington, Oxford, UK
| | - James O J Davies
- Weatherall Institute of Molecular Medicine, MRC Molecular Haematology Unit, University of Oxford, Headington, Oxford, UK
| | - Marta Tapia
- Weatherall Institute of Molecular Medicine, MRC Molecular Haematology Unit, University of Oxford, Headington, Oxford, UK
| | - Erica Ballabio
- Weatherall Institute of Molecular Medicine, MRC Molecular Haematology Unit, University of Oxford, Headington, Oxford, UK
| | - Jim R Hughes
- Weatherall Institute of Molecular Medicine, MRC Molecular Haematology Unit, University of Oxford, Headington, Oxford, UK
| | - Huimin Geng
- Department of Laboratory Medicine, University of California San Francisco, San Francisco, CA
| | - Marina Konopleva
- Department of Leukemia, University of Texas MD Anderson Cancer Center, Houston, TX
| | - Thomas A Milne
- Weatherall Institute of Molecular Medicine, MRC Molecular Haematology Unit, University of Oxford, Headington, Oxford, UK.
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New insights into transcriptional and leukemogenic mechanisms of AML1-ETO and E2A fusion proteins. ACTA ACUST UNITED AC 2016; 11:285-304. [PMID: 28261265 DOI: 10.1007/s11515-016-1415-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
BACKGROUND Nearly 15% of acute myeloid leukemia (AML) cases are caused by aberrant expression of AML1-ETO, a fusion protein generated by the t(8;21) chromosomal translocation. Since its discovery, AML1-ETO has served as a prototype to understand how leukemia fusion proteins deregulate transcription to promote leukemogenesis. Another leukemia fusion protein, E2A-Pbx1, generated by the t(1;19) translocation, is involved in acute lymphoblastic leukemias (ALLs). While AML1-ETO and E2A-Pbx1 are structurally unrelated fusion proteins, we have recently shown that a common axis, the ETO/E-protein interaction, is involved in the regulation of both fusion proteins, underscoring the importance of studying protein-protein interactions in elucidating the mechanisms of leukemia fusion proteins. OBJECTIVE In this review, we aim to summarize these new developments while also providing a historic overview of the related early studies. METHODS A total of 218 publications were reviewed in this article, a majority of which were published after 2004.We also downloaded 3D structures of AML1-ETO domains from Protein Data Bank and provided a systematic summary of their structures. RESULTS By reviewing the literature, we summarized early and recent findings on AML1-ETO, including its protein-protein interactions, transcriptional and leukemogenic mechanisms, as well as the recently reported involvement of ETO family corepressors in regulating the function of E2A-Pbx1. CONCLUSION While the recent development in genomic and structural studies has clearly demonstrated that the fusion proteins function by directly regulating transcription, a further understanding of the underlying mechanisms, including crosstalk with other transcription factors and cofactors, and the protein-protein interactions in the context of native proteins, may be necessary for the development of highly targeted drugs for leukemia therapy.
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