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Zhang X, Zhong Y, Liu L, Suo S, Zhao S, Xiao F, Qin J, Tong H, Jin J, Yu W. MN1::ETV6-positive de novo T-cell acute lymphoblastic leukaemia is sensitive to venetoclax: A case report. Br J Haematol 2024. [PMID: 38685592 DOI: 10.1111/bjh.19493] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2024] [Accepted: 04/17/2024] [Indexed: 05/02/2024]
Affiliation(s)
- Xiang Zhang
- Department of Hematology, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, PR China
- Zhejiang Provincial Key Laboratory of Hematologic Malignancy, Zhejiang University, Hangzhou, Zhejiang, PR China
- Zhejiang Provincial Clinical Research Center for Hematological Disorders, Hangzhou, Zhejiang, PR China
- Zhejiang University Cancer Center, Hangzhou, Zhejiang, PR China
| | - Yi Zhong
- Department of Hematology, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, PR China
- Zhejiang Provincial Key Laboratory of Hematologic Malignancy, Zhejiang University, Hangzhou, Zhejiang, PR China
- Zhejiang Provincial Clinical Research Center for Hematological Disorders, Hangzhou, Zhejiang, PR China
- Zhejiang University Cancer Center, Hangzhou, Zhejiang, PR China
| | - Lixia Liu
- Acornmed Biotechnology Co. Ltd., Tianjin, PR China
| | - Shanshan Suo
- Department of Hematology, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, PR China
- Zhejiang Provincial Key Laboratory of Hematologic Malignancy, Zhejiang University, Hangzhou, Zhejiang, PR China
- Zhejiang Provincial Clinical Research Center for Hematological Disorders, Hangzhou, Zhejiang, PR China
- Zhejiang University Cancer Center, Hangzhou, Zhejiang, PR China
| | - Shuqi Zhao
- Department of Hematology, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, PR China
- Zhejiang Provincial Key Laboratory of Hematologic Malignancy, Zhejiang University, Hangzhou, Zhejiang, PR China
- Zhejiang Provincial Clinical Research Center for Hematological Disorders, Hangzhou, Zhejiang, PR China
- Zhejiang University Cancer Center, Hangzhou, Zhejiang, PR China
| | - Feng Xiao
- Department of Hematology, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, PR China
- Zhejiang Provincial Key Laboratory of Hematologic Malignancy, Zhejiang University, Hangzhou, Zhejiang, PR China
- Zhejiang Provincial Clinical Research Center for Hematological Disorders, Hangzhou, Zhejiang, PR China
- Zhejiang University Cancer Center, Hangzhou, Zhejiang, PR China
| | - Jiayue Qin
- Acornmed Biotechnology Co. Ltd., Tianjin, PR China
| | - Hongyan Tong
- Department of Hematology, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, PR China
- Zhejiang Provincial Key Laboratory of Hematologic Malignancy, Zhejiang University, Hangzhou, Zhejiang, PR China
- Zhejiang Provincial Clinical Research Center for Hematological Disorders, Hangzhou, Zhejiang, PR China
- Zhejiang University Cancer Center, Hangzhou, Zhejiang, PR China
| | - Jie Jin
- Department of Hematology, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, PR China
- Zhejiang Provincial Key Laboratory of Hematologic Malignancy, Zhejiang University, Hangzhou, Zhejiang, PR China
- Zhejiang Provincial Clinical Research Center for Hematological Disorders, Hangzhou, Zhejiang, PR China
- Zhejiang University Cancer Center, Hangzhou, Zhejiang, PR China
| | - Wenjuan Yu
- Department of Hematology, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, PR China
- Zhejiang Provincial Key Laboratory of Hematologic Malignancy, Zhejiang University, Hangzhou, Zhejiang, PR China
- Zhejiang Provincial Clinical Research Center for Hematological Disorders, Hangzhou, Zhejiang, PR China
- Zhejiang University Cancer Center, Hangzhou, Zhejiang, PR China
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2
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Choate LA, Jiang L, Stein MI, Shen W, Baughn LB, Peterson JF. Detection of an MN1::ETV6 Gene Fusion in a Case of Acute Myeloid Leukemia with Erythroid Differentiation: A Case Report and Review of the Literature. Case Rep Hematol 2023; 2023:9771388. [PMID: 37434656 PMCID: PMC10332927 DOI: 10.1155/2023/9771388] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2023] [Revised: 05/17/2023] [Accepted: 06/27/2023] [Indexed: 07/13/2023] Open
Abstract
The MN1::ETV6 gene fusion resulting from t(12;22)(p13;q12) has been rarely reported in myeloid neoplasms. We describe a 69-year-old male with newly diagnosed acute myeloid leukemia (AML) with erythroid differentiation and t(12;22)(p13;q12) demonstrated by conventional chromosome studies. Subsequent fluorescence in situ hybridization studies demonstrated a balanced ETV6 gene rearrangement (at 12p13). To further characterize this translocation, whole-genome sequencing was performed which confirmed t(12;22) with breakpoints involving the MN1 and ETV6 genes. Herein, we describe our case and review the literature to summarize the clinical and laboratory findings in patients with this rare but recurrent MN1::ETV6 gene fusion observed in myeloid neoplasms. Importantly, this case expands the clinical spectrum associated with the MN1::ETV6 gene fusion to include AML with erythroid differentiation. Lastly, this case demonstrates the importance of moving toward more comprehensive molecular testing to fully characterize the driver events in neoplastic genomes.
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Affiliation(s)
- Lauren A. Choate
- Division of Laboratory Genetics and Genomics, Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, Minnesota, USA
| | - Liuyan Jiang
- Department of Laboratory Medicine and Pathology, Mayo Clinic, Jacksonville, Florida, USA
| | - Mariam I. Stein
- Department of Biomedical Statistics and Informatics, Mayo Clinic, Rochester, Minnesota, USA
| | - Wei Shen
- Division of Laboratory Genetics and Genomics, Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, Minnesota, USA
| | - Linda B. Baughn
- Division of Hematopathology, Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, Minnesota, USA
| | - Jess F. Peterson
- Division of Hematopathology, Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, Minnesota, USA
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3
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Jevtic Z, Allram M, Grebien F, Schwaller J. Biomolecular Condensates in Myeloid Leukemia: What Do They Tell Us? Hemasphere 2023; 7:e923. [PMID: 37388925 PMCID: PMC10306439 DOI: 10.1097/hs9.0000000000000923] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2023] [Accepted: 05/31/2023] [Indexed: 07/01/2023] Open
Abstract
Recent studies have suggested that several oncogenic and tumor-suppressive proteins carry out their functions in the context of specific membrane-less cellular compartments. As these compartments, generally referred to as onco-condensates, are specific to tumor cells and are tightly linked to disease development, the mechanisms of their formation and maintenance have been intensively studied. Here we review the proposed leukemogenic and tumor-suppressive activities of nuclear biomolecular condensates in acute myeloid leukemia (AML). We focus on condensates formed by oncogenic fusion proteins including nucleoporin 98 (NUP98), mixed-lineage leukemia 1 (MLL1, also known as KMT2A), mutated nucleophosmin (NPM1c) and others. We also discuss how altered condensate formation contributes to malignant transformation of hematopoietic cells, as described for promyelocytic leukemia protein (PML) in PML::RARA-driven acute promyelocytic leukemia (APL) and other myeloid malignancies. Finally, we discuss potential strategies for interfering with the molecular mechanisms related to AML-associated biomolecular condensates, as well as current limitations of the field.
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Affiliation(s)
- Zivojin Jevtic
- Department of Biomedicine (DBM), University Children’s Hospital Basel, University of Basel, Switzerland
| | - Melanie Allram
- Institute for Medical Biochemistry, University of Veterinary Medicine, Vienna, Austria
| | - Florian Grebien
- Institute for Medical Biochemistry, University of Veterinary Medicine, Vienna, Austria
- St. Anna Children’s Cancer Research Institute (CCRI), Vienna, Austria
| | - Juerg Schwaller
- Department of Biomedicine (DBM), University Children’s Hospital Basel, University of Basel, Switzerland
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4
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Freitas AC, Maia T, Desterro J, Pierdomenico F, Nunes A, Ferreira I, Cabeçadas J, Gomes da Silva M. Extramedullary T-lymphoblastic Crisis in a Myelodysplastic/Myeloproliferative Neoplasm with a t(12;22)/MN1::ETV6 Translocation. Hematol Rep 2023; 15:212-219. [PMID: 36975735 PMCID: PMC10048276 DOI: 10.3390/hematolrep15010022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Revised: 02/27/2023] [Accepted: 03/09/2023] [Indexed: 03/15/2023] Open
Abstract
Myelodysplastic/myeloproliferative neoplasms (MDS/MPN) are not a single disease, but rather a heterogenous group of entities which are increasingly subclassified according to recurrent genetic abnormalities. Chromosomal translocations involving meningioma 1 (MN1) and ETS variant 6 (ETV6) genes are extremely rare, but recurrent in myeloid neoplasms. We describe the case of a patient with a myelodysplastic/myeloproliferative neoplasm with neutrophilia, who developed an extramedullary T-lymphoblastic crisis with the t(12;22)(p13;q12) translocation as the only cytogenetic abnormality. This case shares several clinical and molecular features with myeloid/lymphoid neoplasms with eosinophilia. The treatment of this patient was challenging, as the disease proved to be highly refractory to chemotherapy, with allogenic stem cell transplantation as the only curative option. This clinical presentation has not been reported in association with these genetic alterations and supports the concept of a hematopoietic neoplasm originating in an early uncommitted precursor cell. Additionally, it stresses the importance of molecular characterization in the classification and prognostic stratification of these entities.
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Affiliation(s)
- Ana Carolina Freitas
- Department of Hematology, Portuguese Institute of Oncology Lisbon, 1099-023 Lisbon, Portugal
- Correspondence:
| | - Tiago Maia
- Department of Pathology, Portuguese Institute of Oncology Lisbon, 1099-023 Lisbon, Portugal
| | - Joana Desterro
- Department of Hematology, Portuguese Institute of Oncology Lisbon, 1099-023 Lisbon, Portugal
| | - Francesca Pierdomenico
- Department of Hematology, Portuguese Institute of Oncology Lisbon, 1099-023 Lisbon, Portugal
| | - Albertina Nunes
- Department of Hematology, Portuguese Institute of Oncology Lisbon, 1099-023 Lisbon, Portugal
| | - Isabelina Ferreira
- Department of Bone Marrow Transplantation, Portuguese Institute of Oncology Lisbon, 1099-023 Lisbon, Portugal
| | - José Cabeçadas
- Department of Pathology, Portuguese Institute of Oncology Lisbon, 1099-023 Lisbon, Portugal
| | - Maria Gomes da Silva
- Department of Hematology, Portuguese Institute of Oncology Lisbon, 1099-023 Lisbon, Portugal
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5
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Rosenzweig J, Pillai PM, Prockop S, Benayed R, Eidenschink Brodersen L, Najfeld V, Loken MR, Zhang Y, Shukla N. Acute myeloid leukemia with an MN1-ETV6 fusion in a young child with Down syndrome. Cold Spring Harb Mol Case Stud 2022; 8:a006167. [PMID: 35483876 PMCID: PMC9059786 DOI: 10.1101/mcs.a006167] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Accepted: 02/16/2022] [Indexed: 11/24/2022] Open
Abstract
Myeloid leukemia of Down syndrome (ML-DS) in young children is associated with distinct clinical and biological features and is typically initiated with oncogenic mutations in the X-linked megakaryocytic transcription factor GATA1. Here we present a 3-yr-old child with DS diagnosed with acute myeloid leukemia (AML), which lacks typical immunophenotypic and molecular characteristics of ML-DS, including GATA1 mutations. The leukemic blasts were found to have an MN1-ETV6 gene fusion, a high-risk oncofusion not previously described in DS patients. This report highlights the importance of immunophenotypic, cytogenetic, and molecular characterization of ML-DS for identification of rare cases with unique features that may benefit from treatment protocols that are more intensive than those developed for patients with typical GATA1 mutant ML-DS.
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Affiliation(s)
- Jaclyn Rosenzweig
- Department of Pediatrics, Memorial Sloan Kettering Cancer Center, New York, New York 10065, USA
| | - Pallavi M Pillai
- Department of Pediatrics, Division of Pediatric Hematology-Oncology, Mount Sinai Kravis Children's Hospital, Icahn School of Medicine at Mount Sinai, New York, New York 10029, USA
| | - Susan Prockop
- Department of Pediatrics, Memorial Sloan Kettering Cancer Center, New York, New York 10065, USA
| | - Ryma Benayed
- Department of Pathology, Memorial Sloan Kettering Cancer Center, New York, New York 10065, USA
| | | | - Vesna Najfeld
- Department of Medicine and Pathology, Tumor Cytogenomics, Icahn School of Medicine at Mount Sinai Hospital, New York, New York 10029, USA
| | | | - Yanming Zhang
- Department of Pathology, Memorial Sloan Kettering Cancer Center, New York, New York 10065, USA
| | - Neerav Shukla
- Department of Pediatrics, Memorial Sloan Kettering Cancer Center, New York, New York 10065, USA
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6
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Stonestrom AJ, Levine RL. The BAFfling story of MN1-induced leukemogenesis. Mol Cell 2021; 81:2268-2269. [PMID: 34087176 DOI: 10.1016/j.molcel.2021.05.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Riedel et al. (2021) show that expression of MN1 is capable of blocking myeloid differentiation and initiating leukemia through mechanisms that require Brg1-containing chromatin remodeling complexes. Intriguingly, this process depends on an unstructured polyglutamine repeat region within MN1.
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Affiliation(s)
- Aaron J Stonestrom
- Human Oncology and Pathogenesis Program, Memorial Sloan Kettering Cancer Center, New York, New York 10065, USA; Department of Medicine, Leukemia Service, Memorial Sloan Kettering Cancer Center, New York, New York 10065, USA
| | - Ross L Levine
- Human Oncology and Pathogenesis Program, Memorial Sloan Kettering Cancer Center, New York, New York 10065, USA; Department of Medicine, Leukemia Service, Memorial Sloan Kettering Cancer Center, New York, New York 10065, USA; Center for Epigenetics Research, Memorial Sloan Kettering Cancer Center, New York, New York 10065, USA; Center for Hematologic Malignancies, Memorial Sloan Kettering Cancer Center, New York, New York 10065, USA; Molecular Cancer Medicine Service, Memorial Sloan Kettering Cancer Center, New York, New York 10065, USA.
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7
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Xiao S, Huang Q, Ren H, Yang M. The mechanism and function of super enhancer RNA. Genesis 2021; 59:e23422. [PMID: 34028961 DOI: 10.1002/dvg.23422] [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: 01/01/2021] [Revised: 04/23/2021] [Accepted: 04/27/2021] [Indexed: 12/19/2022]
Abstract
Super enhancer (SE) is a cluster of enhancers that has a stronger ability to promote transcription compared to the typical enhancer (TE). Similar to TE, which can transcribe enhancer RNA (eRNA), SE produces super enhancer RNA (seRNA). The activation of SE is cell and tissue-specific, and the SE-associated genes are mostly linked to the cell fate. This is demonstrated by the important role-played by SE in the embryonic stem cell (ESC) and multiple cancer development. SeRNA regulates transcription in both cis and trans configuration, and those located in the cytoplasm mediates various cell activities. However, the functions of seRNAs are unclear, and most of them have a synergistic effect with SE and SE-associated genes. In this mini review, we summarized the mechanisms of seRNA and functions of both SE and seRNA.
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Affiliation(s)
- Shibai Xiao
- Department of Rheumatology and Immunology, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Qin Huang
- Department of Rheumatology and Immunology, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Hao Ren
- Department of Rheumatology and Immunology, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Min Yang
- Department of Rheumatology and Immunology, Nanfang Hospital, Southern Medical University, Guangzhou, China
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8
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Intrinsically disordered Meningioma-1 stabilizes the BAF complex to cause AML. Mol Cell 2021; 81:2332-2348.e9. [PMID: 33974912 DOI: 10.1016/j.molcel.2021.04.014] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Revised: 02/05/2021] [Accepted: 04/15/2021] [Indexed: 02/07/2023]
Abstract
Meningioma-1 (MN1) overexpression in AML is associated with poor prognosis, and forced expression of MN1 induces leukemia in mice. We sought to determine how MN1 causes AML. We found that overexpression of MN1 can be induced by translocations that result in hijacking of a downstream enhancer. Structure predictions revealed that the entire MN1 coding frame is disordered. We identified the myeloid progenitor-specific BAF complex as the key interaction partner of MN1. MN1 over-stabilizes BAF on enhancer chromatin, a function directly linked to the presence of a long polyQ-stretch within MN1. BAF over-stabilization at binding sites of transcription factors regulating a hematopoietic stem/progenitor program prevents the developmentally appropriate decommissioning of these enhancers and results in impaired myeloid differentiation and leukemia. Beyond AML, our data detail how the overexpression of a polyQ protein, in the absence of any coding sequence mutation, can be sufficient to cause malignant transformation.
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9
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Libbrecht C, Xie HM, Kingsley MC, Haladyna JN, Riedel SS, Alikarami F, Lenard A, McGeehan GM, Ernst P, Bernt KM. Menin is necessary for long term maintenance of meningioma-1 driven leukemia. Leukemia 2021; 35:1405-1417. [PMID: 33542482 PMCID: PMC8102197 DOI: 10.1038/s41375-021-01146-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Revised: 12/04/2020] [Accepted: 01/21/2021] [Indexed: 01/30/2023]
Abstract
Translocations of Meningioma-1 (MN1) occur in a subset of acute myeloid leukemias (AML) and result in high expression of MN1, either as a full-length protein, or as a fusion protein that includes most of the N-terminus of MN1. High levels of MN1 correlate with poor prognosis. When overexpressed in murine hematopoietic progenitors, MN1 causes an aggressive AML characterized by an aberrant myeloid precursor-like gene expression program that shares features of KMT2A-rearranged (KMT2A-r) leukemia, including high levels of Hoxa and Meis1 gene expression. Compounds that target a critical KMT2A-Menin interaction have proven effective in KMT2A-r leukemia. Here, we demonstrate that Menin (Men1) is also critical for the self-renewal of MN1-driven AML through the maintenance of a distinct gene expression program. Genetic inactivation of Men1 led to a decrease in the number of functional leukemia-initiating cells. Pharmacologic inhibition of the KMT2A-Menin interaction decreased colony-forming activity, induced differentiation programs in MN1-driven murine leukemia and decreased leukemic burden in a human AML xenograft carrying an MN1-ETV6 translocation. Collectively, these results nominate Menin inhibition as a promising therapeutic strategy in MN1-driven leukemia.
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Affiliation(s)
- Clara Libbrecht
- grid.239552.a0000 0001 0680 8770Division of Pediatric Oncology, Children’s Hospital of Philadelphia, Philadelphia, PA USA ,grid.452431.50000 0004 0442 349XInstitut d’Hématologie et d’Oncologie Pédiatrique, Lyon, France
| | - Hongbo M. Xie
- grid.239552.a0000 0001 0680 8770Department of Bioinformatics and Health Informatics (DBHI), Children’s Hospital of Philadelphia, Philadelphia, PA USA
| | - Molly C. Kingsley
- grid.239552.a0000 0001 0680 8770Division of Pediatric Oncology, Children’s Hospital of Philadelphia, Philadelphia, PA USA
| | - Jessica N. Haladyna
- grid.430503.10000 0001 0703 675XDepartment of Pediatrics, Section of Hematology/Oncology/BMT, University of Colorado, Denver/Anschutz Medical Campus, Aurora, CO USA
| | - Simone S. Riedel
- grid.239552.a0000 0001 0680 8770Division of Pediatric Oncology, Children’s Hospital of Philadelphia, Philadelphia, PA USA
| | - Fatemeh Alikarami
- grid.239552.a0000 0001 0680 8770Division of Pediatric Oncology, Children’s Hospital of Philadelphia, Philadelphia, PA USA
| | - Alexandra Lenard
- grid.239552.a0000 0001 0680 8770Division of Pediatric Oncology, Children’s Hospital of Philadelphia, Philadelphia, PA USA
| | | | - Patricia Ernst
- grid.430503.10000 0001 0703 675XDepartment of Pediatrics, Section of Hematology/Oncology/BMT, University of Colorado, Denver/Anschutz Medical Campus, Aurora, CO USA ,grid.430503.10000 0001 0703 675XDepartment of Pharmacology, University of Colorado, Denver/Anschutz Medical Campus, Aurora, CO USA
| | - Kathrin M. Bernt
- grid.239552.a0000 0001 0680 8770Division of Pediatric Oncology, Children’s Hospital of Philadelphia, Philadelphia, PA USA ,grid.25879.310000 0004 1936 8972Department of Pediatrics, Perelman School of Medicine at the University of Pennsylvania and Abramson Cancer Center, Philadelphia, PA USA ,grid.239552.a0000 0001 0680 8770Division of Oncology and Center for Childhood Cancer Research, Children’s Hospital of Philadelphia, 3501 Civic Center Boulevard, CTRB 3064, Philadelphia, PA 19104 USA
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