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van Outersterp I, Tasian SK, Reichert CEJ, Boeree A, de Groot-Kruseman HA, Escherich G, Boer JM, den Boer ML. Tyrosine kinase inhibitor response of ABL-class acute lymphoblastic leukemia: the role of kinase type and SH3 domain. Blood 2024; 143:2178-2189. [PMID: 38394665 PMCID: PMC11143520 DOI: 10.1182/blood.2023023120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2023] [Revised: 01/10/2024] [Accepted: 01/23/2024] [Indexed: 02/25/2024] Open
Abstract
ABSTRACT Acute lymphoblastic leukemia (ALL) with fusions of ABL-class tyrosine kinase genes other than BCR::ABL1 occurs in ∼3% of children with ALL. The tyrosine kinase genes involved in this BCR::ABL1-like (Ph-like) subtype include ABL1, PDGFRB, ABL2, and CSF1R, each of which has up to 10 described partner genes. ABL-class ALL resembles BCR::ABL1-positive ALL with a similar gene expression profile, poor response to chemotherapy, and sensitivity to tyrosine kinase inhibitors (TKIs). There is a lack of comprehensive data regarding TKI sensitivity in the heterogeneous group of ABL-class ALL. We observed variability in TKI sensitivity within and among each ABL-class tyrosine kinase gene subgroup. We showed that ALL samples with fusions for any of the 4 tyrosine kinase genes were relatively sensitive to imatinib. In contrast, the PDGFRB-fused ALL samples were less sensitive to dasatinib and bosutinib. Variation in ex vivo TKI response within the subset of samples with the same ABL-class tyrosine kinase gene was not associated with the ALL immunophenotype, 5' fusion partner, presence or absence of Src-homology-2/3 domains, or deletions of IKZF1, PAX5, or CDKN2A/B. In conclusion, the tyrosine kinase gene involved in ABL-class ALL is the main determinant of TKI sensitivity and relevant for specific TKI selection.
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Affiliation(s)
| | - Sarah K Tasian
- Division of Oncology, Children's Hospital of Philadelphia, Philadelphia, PA
| | | | - Aurélie Boeree
- Princess Máxima Center for Pediatric Oncology, Utrecht, The Netherlands
| | | | - Gabriele Escherich
- Department of Pediatric Hematology and Oncology, University Medical Center Hamburg Eppendorf, Hamburg, Germany
| | - Judith M Boer
- Princess Máxima Center for Pediatric Oncology, Utrecht, The Netherlands
| | - Monique L den Boer
- Princess Máxima Center for Pediatric Oncology, Utrecht, The Netherlands
- Department of Pediatric Oncology and Hematology, Erasmus MC-Sophia Children's Hospital, Rotterdam, The Netherlands
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2
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Cui Y, Peng H. Imatinib and CAR T cell therapy enable sustained response in a young patient with refractory RCSD1-ABL1-positive acute lymphoblastic leukemia. Ann Hematol 2024; 103:361-362. [PMID: 37864715 DOI: 10.1007/s00277-023-05489-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2023] [Accepted: 09/28/2023] [Indexed: 10/23/2023]
Affiliation(s)
- Yajuan Cui
- Department of Hematology, The Second Xiangya Hospital, Central South University, Renminzhong Road 139, Changsha, 410011, Hunan Province, China
| | - Hongling Peng
- Department of Hematology, The Second Xiangya Hospital, Central South University, Renminzhong Road 139, Changsha, 410011, Hunan Province, China.
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3
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Senapati J, Jabbour E, Konopleva M, Short NJ, Tang G, Daver N, Kebriaei P, Kadia T, Pemmaraju N, Takahashi K, DiNardo C, Sasaki K, Borthakur G, Thakral B, Kanagal-Shamanna R, Patel K, Ravandi F, Roberts K, Mullighan C, Kantarjian H, Jain N. Philadelphia-Like Genetic Rearrangements in Adults With B-Cell ALL: Refractoriness to Chemotherapy and Response to Tyrosine Kinase Inhibitor in ABL Class Rearrangements. JCO Precis Oncol 2023; 7:e2200707. [PMID: 37196217 PMCID: PMC10309573 DOI: 10.1200/po.22.00707] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Revised: 03/05/2023] [Accepted: 03/15/2023] [Indexed: 05/19/2023] Open
Abstract
PURPOSE Philadelphia-like (Ph-like) B-cell ALL is a high-risk subtype of B-cell ALL that shares a gene expression profile with Ph-positive ALL, but without a BCR::ABL1 fusion. A subgroup of these patients have fusions or rearrangements involving genes such as ABL1, ABL2, PDGFRβ, JAK2, and EPOR, some of which are potentially sensitive to tyrosine kinase inhibitors (TKIs). Prompt identification of these genetic aberrations are important for prognostication and treatment decisions. PATIENTS AND METHODS We performed a retrospective review of patients with B-cell ALL treated at MD Anderson Cancer Center to identify recurrent genetic fusions commonly seen in Ph-like ALL and focus on patients treated with TKI. RESULTS We identified 23 patients with recurrent genetic fusions commonly seen in Ph-like ALL; 14 had ABL class fusions (eight ABL1, one ABL2, and five PDGFRβ) and nine had JAK2 class fusions (five JAK2 and four EPOR). Notably, several of these fusions were cryptic by conventional cytogenetics and fluorescent in situ hybridization (FISH) assays and identified only by multiplex fusion assay. Thirteen of these 23 patients received a TKI as part of their treatment; this included ABL1 fusion (n = 8), PDGFRβ fusion (n = 4), and EPOR fusion (n = 1). All four patients with ABL1 fusions who received TKI with induction chemotherapy are alive in first remission. CONCLUSION Understanding the genomics of B-cell ALL is important for disease prognostication and for precise treatment planning. Besides conventional cytogenetics and directed FISH testing, multiplex fusion assays can help identify recurrent chromosomal translocations that are seen in patients with Ph-like ALL. Early initiation of TKI appears beneficial; larger studies are required to fully understand the benefit of TKI and to design rational combination therapies for these patients.
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Affiliation(s)
- Jayastu Senapati
- Department of Leukemia, University of Texas MD Anderson Cancer Center, Houston, TX
| | - Elias Jabbour
- Department of Leukemia, University of Texas MD Anderson Cancer Center, Houston, TX
| | - Marina Konopleva
- Department of Leukemia, University of Texas MD Anderson Cancer Center, Houston, TX
| | - Nicholas J. Short
- Department of Leukemia, University of Texas MD Anderson Cancer Center, Houston, TX
| | - Guilin Tang
- Department of Hematopathology, University of Texas MD Anderson Cancer Center, Houston, TX
| | - Naval Daver
- Department of Leukemia, University of Texas MD Anderson Cancer Center, Houston, TX
| | - Partow Kebriaei
- Department of Stem Cell Transplantation, University of Texas MD Anderson Cancer Center, Houston, TX
| | - Tapan Kadia
- Department of Leukemia, University of Texas MD Anderson Cancer Center, Houston, TX
| | - Naveen Pemmaraju
- Department of Leukemia, University of Texas MD Anderson Cancer Center, Houston, TX
| | - Koichi Takahashi
- Department of Leukemia, University of Texas MD Anderson Cancer Center, Houston, TX
| | - Courtney DiNardo
- Department of Leukemia, University of Texas MD Anderson Cancer Center, Houston, TX
| | - Koji Sasaki
- Department of Leukemia, University of Texas MD Anderson Cancer Center, Houston, TX
| | - Gautam Borthakur
- Department of Leukemia, University of Texas MD Anderson Cancer Center, Houston, TX
| | - Beenu Thakral
- Department of Hematopathology, University of Texas MD Anderson Cancer Center, Houston, TX
| | | | - Keyur Patel
- Department of Hematopathology, University of Texas MD Anderson Cancer Center, Houston, TX
| | - Farhad Ravandi
- Department of Leukemia, University of Texas MD Anderson Cancer Center, Houston, TX
| | - Kathryn Roberts
- Department of Pathology, St Jude Children's Research Hospital, Memphis, TN
| | - Charles Mullighan
- Department of Pathology, St Jude Children's Research Hospital, Memphis, TN
| | - Hagop Kantarjian
- Department of Leukemia, University of Texas MD Anderson Cancer Center, Houston, TX
| | - Nitin Jain
- Department of Leukemia, University of Texas MD Anderson Cancer Center, Houston, TX
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4
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Qiao H, Yin H, Feng Y, Tang H. Pan-cancer analysis reveals the relationship between RCSD1 immune infiltration and clinical prognosis in human tumors. Front Immunol 2022; 13:1008778. [PMID: 36311703 PMCID: PMC9606721 DOI: 10.3389/fimmu.2022.1008778] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2022] [Accepted: 09/23/2022] [Indexed: 11/13/2022] Open
Abstract
Background RCSD1 is a cytoskeletal regulator that has been confirmed to undergo genetic mutations in hematological tumors, but the mechanisms of RCSD1 in pan-cancer and its impact on patient prognosis have not been studied. Methods Using TCGA, GEPIA, UALCAN, Kaplan-Meier plotters, Linkedomics, String, cBioPortal, TISIDB, TCIA and TIMER database methods, we investigated the expression of RCSD1 in human tumors and its relationship to clinical prognosis, functional analysis of co-expression networks, mutation status, and immune infiltration in cancers, especially lung adenocarcinoma (LUAD) and lung squamous cell carcinoma (LUSC). Results The expression of RCSD1 is low in most tumors compared with normal tissues, and its high expression is associated with good patient survival. The RCSD1 co-expression network is mainly involved in the regulation of immune response. In human cancer, RCSD1 plays an important role in the tumor microenvironment (TME) and is significantly associated with the expression of immune infiltrating cells (TIL) in lung cancer. Conclusions As a prognostic biomarker of generalized cancer, RCSD1 is associated with immune infiltration.
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Affiliation(s)
- Han Qiao
- Department of Respiratory Medicine, Qingdao Municipal Hospital, Qingdao University, Qingdao, China
| | - Hong Yin
- Department of Thoracic Surgery, Qingdao Municipal Hospital, Qingdao, China
| | - Yan Feng
- Department of Respiratory Medicine, Qingdao Municipal Hospital, Qingdao University, Qingdao, China
| | - Huaping Tang
- Department of Respiratory Medicine, Qingdao Municipal Hospital, Qingdao University, Qingdao, China
- *Correspondence: Huaping Tang,
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5
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El Jammal T, Pavic M, Gerfaud-Valentin M, Jamilloux Y, Sève P. Sarcoidosis and Cancer: A Complex Relationship. Front Med (Lausanne) 2020; 7:594118. [PMID: 33330555 PMCID: PMC7732692 DOI: 10.3389/fmed.2020.594118] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2020] [Accepted: 10/30/2020] [Indexed: 12/19/2022] Open
Abstract
Sarcoidosis is a systemic disease of unknown etiology, characterized by the presence of non-caseating granulomas in various organs, mainly the lungs, and the lymphatic system. Since the individualization of sarcoidosis-lymphoma association by Brincker et al., the relationship between sarcoidosis or granulomatous syndromes and malignancies has been clarified through observational studies worldwide. Two recent meta-analyses showed an increased risk of neoplasia in sarcoidosis. The granulomatosis can also reveal malignancy, either solid or hematological, defining paraneoplastic sarcoidosis. Recent cancer immunotherapies, including immune checkpoint inhibitors (targeting PD-1, PD-L1, or CTLA-4) and BRAF or MEK inhibitors were also reported as possible inducers of sarcoidosis-like reactions. Sarcoidosis and neoplasia, especially lymphoma, can show overlapping presentations, thus making the diagnosis and treatment harder to deal with. There are currently no formal recommendations to guide the differential diagnosis workup between the evolution of lymphoma or a solid cancer and a granulomatous reaction associated with neoplasia. Thus, in atypical presentations (e.g., deeply impaired condition, compressive lymphadenopathy, atypical localization, unexplained worsening lymphadenopathy, or splenomegaly), and treatment-resistant disease, targeted biopsies on suspect localizations with histological examination could help the clinician to differentiate neoplasia from sarcoidosis. Pathological diagnosis could sometimes be challenging since very few tumor cells may be surrounded by massive granulomatous reaction. The sensitization of currently available diagnostic tools should improve the diagnostic accuracy, such as the use of more “cancer-specific” radioactive tracers coupled with Positron Emission Tomography scan.
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Affiliation(s)
- Thomas El Jammal
- Internal Medicine Department, La Croix-Rousse Hospital, Lyon, France
| | - Michel Pavic
- Medicine Department, Sherbrooke University, Sherbrooke, QC, Canada
| | | | - Yvan Jamilloux
- Internal Medicine Department, La Croix-Rousse Hospital, Lyon, France.,INSERM U1111, Center International de Recherche en Infectiologie/International Research Center in Infectiology (CIRI), University Claude-Bernard Lyon 1, Villeurbanne, France
| | - Pascal Sève
- Internal Medicine Department, La Croix-Rousse Hospital, Lyon, France.,Pôle IMER, Hospices Civils de Lyon, Lyon, France.,HESPER EA 7425, Lyon University, University Claude-Bernard Lyon 1, Lyon, France
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6
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Biloglav A, Olsson-Arvidsson L, Theander J, Behrendtz M, Castor A, Johansson B. SFPQ-ABL1-positive B-cell precursor acute lymphoblastic leukemias. Genes Chromosomes Cancer 2020; 59:540-543. [PMID: 32306475 DOI: 10.1002/gcc.22852] [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: 12/19/2019] [Revised: 04/03/2020] [Accepted: 04/10/2020] [Indexed: 12/22/2022] Open
Abstract
In recent years, a subgroup of B-cell precursor acute lymphoblastic leukemia (BCP ALL) without an established abnormality ("B-other") has been shown to be characterized by rearrangements of ABL1, ABL2, CSF1R, or PDGFRB (a.k.a. ABL-class genes). Using FISH with probes for these genes, we screened 55 pediatric and 50 adult B-other cases. Three (6%) of the adult but none of the childhood B-other cases were positive for ABL-class aberrations. RT-PCR and sequencing confirmed a rare SFPQ-ABL1 fusion in one adult B-other case with t(1;9)(p34;q34). Only six SFPQ-ABL1-positive BCP ALLs have been reported, present case included. A review of these shows that all harbored fusions between exon 9 of SFPQ and exon 4 of ABL1, that the fusion is typically found in adolescents/younger adults without hyperleukocytosis, and that IKZF1 deletions are recurrent. The few patients not treated with tyrosine kinase inhibitors (TKIs) and/or allogeneic stem cell transplantation relapsed, strengthening the notion that TKI should be added to the therapy of SFPQ-ABL1-positive BCP ALL.
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Affiliation(s)
- Andrea Biloglav
- Division of Clinical Genetics, Department of Laboratory Medicine, Lund University, Lund, Sweden
| | - Linda Olsson-Arvidsson
- Division of Clinical Genetics, Department of Laboratory Medicine, Lund University, Lund, Sweden.,Division of Laboratory Medicine, Department of Clinical Genetics and Pathology, Lund, Sweden
| | - Johan Theander
- Department of Hematology, Skåne University Hospital, Lund, Sweden
| | - Mikael Behrendtz
- Department of Pediatrics, Linköping University Hospital, Linköping, Sweden
| | - Anders Castor
- Department of Pediatrics, Skåne University Hospital, Lund, Sweden
| | - Bertil Johansson
- Division of Clinical Genetics, Department of Laboratory Medicine, Lund University, Lund, Sweden.,Division of Laboratory Medicine, Department of Clinical Genetics and Pathology, Lund, Sweden
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7
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Multiplexed Digital Detection of B-Cell Acute Lymphoblastic Leukemia Fusion Transcripts Using the NanoString nCounter System. J Mol Diagn 2020; 22:72-80. [DOI: 10.1016/j.jmoldx.2019.08.008] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2019] [Revised: 08/02/2019] [Accepted: 08/19/2019] [Indexed: 12/27/2022] Open
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8
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Boer JM, den Boer ML. BCR-ABL1-like acute lymphoblastic leukaemia: From bench to bedside. Eur J Cancer 2017; 82:203-218. [PMID: 28709134 DOI: 10.1016/j.ejca.2017.06.012] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2017] [Revised: 05/25/2017] [Accepted: 06/11/2017] [Indexed: 02/01/2023]
Abstract
Acute lymphoblastic leukaemia (ALL) occurs in approximately 1:1500 children and is less frequently found in adults. The most common immunophenotype of ALL is the B cell lineage and within B cell precursor ALL, specific genetic aberrations define subtypes with distinct biological and clinical characteristics. With more advanced genetic analysis methods such as whole genome and transcriptome sequencing, novel genetic subtypes have recently been discovered. One novel class of genetic aberrations comprises tyrosine kinase-activating lesions, including translocations and rearrangements of tyrosine kinase and cytokine receptor genes. These newly discovered genetic aberrations are harder to detect by standard diagnostic methods such as karyotyping, fluorescent in situ hybridisation (FISH) or polymerase chain reaction (PCR) because they are diverse and often cryptic. These lesions involve one of several tyrosine kinase genes (among others, v-abl Abelson murine leukaemia viral oncogene homologue 1 (ABL1), v-abl Abelson murine leukaemia viral oncogene homologue 2 (ABL2), platelet-derived growth factor receptor beta polypeptide (PDGFRB)), each of which can be fused to up to 15 partner genes. Together, they compose 2-3% of B cell precursor ALL (BCP-ALL), which is similar in size to the well-known fusion gene BCR-ABL1 subtype. These so-called BCR-ABL1-like fusions are mutually exclusive with the sentinel translocations in BCP-ALL (BCR-ABL1, ETV6-RUNX1, TCF3-PBX1, and KMT2A (MLL) rearrangements) and have the promising prospect to be sensitive to tyrosine kinase inhibitors similar to BCR-ABL1. In this review, we discuss the types of tyrosine kinase-activating lesions discovered, and the preclinical and clinical evidence for the use of tyrosine kinase inhibitors in the treatment of this novel subtype of ALL.
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Affiliation(s)
- Judith M Boer
- Research Laboratory of Pediatric Oncology, Erasmus MC - Sophia Children's Hospital, Rotterdam, The Netherlands.
| | - Monique L den Boer
- Research Laboratory of Pediatric Oncology, Erasmus MC - Sophia Children's Hospital, Rotterdam, The Netherlands.
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9
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Frech M, Jehn LB, Stabla K, Mielke S, Steffen B, Einsele H, Metzelder SK, Neubauer A. Dasatinib and allogeneic stem cell transplantation enable sustained response in an elderly patient with RCSD1-ABL1-positive acute lymphoblastic leukemia. Haematologica 2017; 102:e160-e162. [PMID: 28057740 DOI: 10.3324/haematol.2016.160531] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Affiliation(s)
- Miriam Frech
- Department of Internal Medicine and Hematology, Oncology and Immunology, Philipps University Marburg, and University Hospital Giessen and Marburg, Baldingerstrasse, Germany
| | - Lutz B Jehn
- Department of Internal Medicine and Hematology, Oncology and Immunology, Philipps University Marburg, and University Hospital Giessen and Marburg, Baldingerstrasse, Germany
| | - Kathleen Stabla
- Department of Internal Medicine and Hematology, Oncology and Immunology, Philipps University Marburg, and University Hospital Giessen and Marburg, Baldingerstrasse, Germany
| | - Stephan Mielke
- Department of Internal Medicine II, University Hospital Würzburg, Oberdürrbacher Straβe 6, Germany
| | - Björn Steffen
- Department of Medicine, Hematology/Oncology, Goethe University of Frankfurt, Theodor-Stern-Kai 7, Germany
| | - Hermann Einsele
- Department of Internal Medicine II, University Hospital Würzburg, Oberdürrbacher Straβe 6, Germany
| | - Stephan K Metzelder
- Department of Internal Medicine and Hematology, Oncology and Immunology, Philipps University Marburg, and University Hospital Giessen and Marburg, Baldingerstrasse, Germany
| | - Andreas Neubauer
- Department of Internal Medicine and Hematology, Oncology and Immunology, Philipps University Marburg, and University Hospital Giessen and Marburg, Baldingerstrasse, Germany
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10
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Sheng G, Zeng Z, Pan J, Wang Q, Yao H, Wen L, Ma L, Wu D, Chen S. t(1;9)(p34;q34)/SFPQ-ABL1 Fusion in a Patient with Ph-Like Common B-Cell Acute Lymphoblastic Leukemia. Acta Haematol 2016; 137:40-43. [PMID: 27894117 DOI: 10.1159/000452265] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2016] [Accepted: 10/02/2016] [Indexed: 11/19/2022]
Affiliation(s)
- Guangying Sheng
- Jiangsu Institute of Hematology, The First Affiliated Hospital of Soochow University, and Collaborative Innovation Center of Hematology, Soochow University, Suzhou, China
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11
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Yap KL, Furtado LV, Kiyotani K, Curran E, Stock W, McNeer JL, Kadri S, Segal JP, Nakamura Y, Le Beau MM, Gurbuxani S, Raca G. Diagnostic evaluation of RNA sequencing for the detection of genetic abnormalities associated with Ph-like acute lymphoblastic leukemia (ALL). Leuk Lymphoma 2016; 58:950-958. [PMID: 27855558 DOI: 10.1080/10428194.2016.1219902] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Philadelphia (Ph)-like acute lymphoblastic leukemia (ALL) is a molecular subtype of high-risk B-cell ALL characterized by formation of abnormal gene fusions involving tyrosine kinase (TK) and cytokine receptor genes and activation of TK signaling. Because of the diversity of associated genetic changes, the detection of Ph-like ALL cases currently requires multiple cytogenetic and molecular assays; thus, our goal was to develop a consolidated workflow for detecting genetic abnormalities in Ph-like ALL. We found that total and targeted RNA sequencing (RNAseq)-based approach allowed the detection of abnormal fusion transcripts (EBF1-PDGFRB, P2RY8-CRLF2, RCSD1-ABL1, and RCSD1-ABL2). The bioinformatics algorithm accurately detected the fusion transcripts without prior input about possible events. Additionally, we showed that RNAseq analysis enabled evaluation for disease-associated sequence variants in expressed transcripts. While total RNAseq can be a second tier approach allowing discovery of novel genetic alterations, the targeted RNAseq workflow offers a clinically applicable method for the detection of fusion transcripts.
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Affiliation(s)
- Kai Lee Yap
- a Department of Medicine, Section of Hematology/Oncology , The University of Chicago , Chicago , IL , USA
| | - Larissa V Furtado
- b Department of Pathology , The University of Chicago , Chicago , IL , USA
| | - Kazuma Kiyotani
- a Department of Medicine, Section of Hematology/Oncology , The University of Chicago , Chicago , IL , USA
| | - Emily Curran
- a Department of Medicine, Section of Hematology/Oncology , The University of Chicago , Chicago , IL , USA
| | - Wendy Stock
- a Department of Medicine, Section of Hematology/Oncology , The University of Chicago , Chicago , IL , USA
| | - Jennifer L McNeer
- c Department of Pediatrics, Section of Pediatric Hematology/Oncology , The University of Chicago , Chicago , IL , USA
| | - Sabah Kadri
- b Department of Pathology , The University of Chicago , Chicago , IL , USA
| | - Jeremy P Segal
- b Department of Pathology , The University of Chicago , Chicago , IL , USA
| | - Yusuke Nakamura
- a Department of Medicine, Section of Hematology/Oncology , The University of Chicago , Chicago , IL , USA
| | - Michelle M Le Beau
- a Department of Medicine, Section of Hematology/Oncology , The University of Chicago , Chicago , IL , USA
| | - Sandeep Gurbuxani
- b Department of Pathology , The University of Chicago , Chicago , IL , USA
| | - Gordana Raca
- a Department of Medicine, Section of Hematology/Oncology , The University of Chicago , Chicago , IL , USA
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12
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Perwein T, Strehl S, König M, Lackner H, Panzer-Grümayer R, Mann G, Attarbaschi A, Urban EC, Haas OA. Imatinib-induced long-term remission in a relapsed RCSD1-ABL1-positive acute lymphoblastic leukemia. Haematologica 2016; 101:e332-5. [PMID: 27125982 DOI: 10.3324/haematol.2015.139568] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Affiliation(s)
- Thomas Perwein
- Division of Pediatric Hematology/Oncology, Medical University of Graz, Austria
| | - Sabine Strehl
- CCRI, Children's Cancer Research Institute, St. Anna Kinderkrebsforschung, Vienna, Austria
| | - Margit König
- CCRI, Children's Cancer Research Institute, St. Anna Kinderkrebsforschung, Vienna, Austria
| | - Herwig Lackner
- Division of Pediatric Hematology/Oncology, Medical University of Graz, Austria
| | - Renate Panzer-Grümayer
- CCRI, Children's Cancer Research Institute, St. Anna Kinderkrebsforschung, Vienna, Austria St. Anna Children's Hospital and Medical University of Vienna, Austria
| | - Georg Mann
- St. Anna Children's Hospital and Medical University of Vienna, Austria
| | | | | | - Oskar A Haas
- CCRI, Children's Cancer Research Institute, St. Anna Kinderkrebsforschung, Vienna, Austria St. Anna Children's Hospital and Medical University of Vienna, Austria
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13
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Huguet F. Dasatinib for acute lymphoblastic leukemia. Expert Opin Orphan Drugs 2015. [DOI: 10.1517/21678707.2015.1098530] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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14
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RCSD1-ABL1 Translocation Associated with IKZF1 Gene Deletion in B-Cell Acute Lymphoblastic Leukemia. Case Rep Hematol 2015; 2015:353247. [PMID: 26600955 PMCID: PMC4639642 DOI: 10.1155/2015/353247] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2015] [Accepted: 10/08/2015] [Indexed: 11/17/2022] Open
Abstract
The RCSD1 gene has recently been identified as a novel gene fusion partner of the ABL1 gene in cases of B-cell Acute Lymphoblastic Leukemia (B-ALL). The RCSD1 gene is located at 1q23 and ABL1 is located at 9q34, so that the RCSD1-ABL1 fusion typically arises through a rare reciprocal translocation t(1;9)(q23;q34). Only a small number of RCSD1-ABL1 positive cases of B-ALL have been described in the literature, and the full spectrum of clinical, morphological, immunophenotypic, and molecular features associated with this genetic abnormality has not been defined. We describe extensive genetic characterization of a case of B-ALL with RCSD1-ABL1 fusion, by using conventional cytogenetic analysis, Fluorescence In Situ Hybridization (FISH) studies, and Chromosomal Microarray Analysis (CMA). The use of CMA resulted in detection of an approximately 70 kb deletion at 7p12.2, which caused a disruption of the IKZF1 gene. Deletions and mutations of IKZF1 are recurring abnormalities in B-ALL and are associated with a poor prognosis. Our findings highlight the association of the deletion of IKZF1 gene with the t(1;9)(q24;q34) and illustrate the importance of comprehensive cytogenetic and molecular evaluation for accurate prediction of prognosis in patients with B-cell ALL.
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15
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Drug response profiling can predict response to ponatinib in a patient with t(1;9)(q24;q34)-associated B-cell acute lymphoblastic leukemia. Blood Cancer J 2015; 5:e292. [PMID: 25768406 PMCID: PMC4382656 DOI: 10.1038/bcj.2015.13] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
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Buchner M, Swaminathan S, Chen Z, Müschen M. Mechanisms of pre-B-cell receptor checkpoint control and its oncogenic subversion in acute lymphoblastic leukemia. Immunol Rev 2015; 263:192-209. [PMID: 25510278 DOI: 10.1111/imr.12235] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Pre-B cells within the bone marrow represent the normal counterpart for most acute lymphoblastic leukemia (ALL). During normal early B-cell development, survival and proliferation signals are dominated by cytokines, particularly interleukin-7 (IL-7) for murine developing B cells. With expression of a functional pre-B-cell receptor (BCR), cytokine signaling is attenuated and the tonic/autonomous pre-BCR signaling pathway provides proliferation as well as differentiation signals. In this review, we first describe checkpoint mechanisms during normal B-cell development and then discuss how genetic lesions in these pathways function as oncogenic mimicries and allow transformed pre-B cells to bypass checkpoint control. We focus on cytokine receptor signaling that is mimicked by activating lesions in receptor subunits or downstream mediators as well as aberrant activation of non-B lymphoid cytokine receptors. Furthermore, we describe the molecular switch from cytokine receptor to pre-BCR signaling, how this pathway is of particular importance for certain ALL subtypes, and how pre-BCR signaling is engaged by genetic lesions, such as BCR-ABL1. We discuss the transcriptional control mechanisms downstream of both cytokine- and pre-BCR signaling and how normal checkpoint control mechanisms are circumvented in pre-B ALL. Finally, we highlight new therapeutic concepts for targeted inhibition of oncogenic cytokine or pre-BCR signaling pathways.
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Affiliation(s)
- Maike Buchner
- Department of Laboratory Medicine, University of California San Francisco, San Francisco, CA, USA
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17
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Alexander S. Clinically defining and managing high-risk pediatric patients with acute lymphoblastic leukemia. HEMATOLOGY. AMERICAN SOCIETY OF HEMATOLOGY. EDUCATION PROGRAM 2014; 2014:181-189. [PMID: 25696853 DOI: 10.1182/asheducation-2014.1.181] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
For children with acute lymphoblastic leukemia, the identification of those at higher risk of disease recurrence and modifying therapy based on this risk is a critical component to the provision of optimal care. The specific definitions of high-risk ALL vary across cooperative groups, but the themes are consistent, being largely based on leukemia biology and disease response. Intensification of conventional chemotherapy for those with high-risk disease has led to improved outcomes. It is anticipated that the development of rational targeted therapy for specific biologically unique subsets of children with leukemia will contribute to ongoing progress in improving the outcomes for children with acute lymphoblastic anemia.
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Abstract
For children with acute lymphoblastic leukemia, the identification of those at higher risk of disease recurrence and modifying therapy based on this risk is a critical component to the provision of optimal care. The specific definitions of high-risk ALL vary across cooperative groups, but the themes are consistent, being largely based on leukemia biology and disease response. Intensification of conventional chemotherapy for those with high-risk disease has led to improved outcomes. It is anticipated that the development of rational targeted therapy for specific biologically unique subsets of children with leukemia will contribute to ongoing progress in improving the outcomes for children with acute lymphoblastic anemia.
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Functional analysis of the SEPT9-ABL1 chimeric fusion gene derived from T-prolymphocytic leukemia. Leuk Res 2014; 38:1451-9. [PMID: 25217890 DOI: 10.1016/j.leukres.2014.08.015] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2014] [Revised: 08/18/2014] [Accepted: 08/24/2014] [Indexed: 12/31/2022]
Abstract
We analyzed the function of a SEPT9-ABL1 fusion identified in a case of T-prolymphocytic leukemia with tyrosine kinase inhibitor (TKI) resistance. Five isoforms with different N-termini, including SEPT9a-ABL1, SEPT9b-ABL1, SEPT9d-ABL1, SEPT9e-ABL1 and SEPT9f-ABL1, were detected in the leukemic cells. All isoforms except SEPT9d-ABL1 are localized in the cytoplasm, undergo autophosphorylation and phosphorylate the downstream targets, STAT-5 and Crkl, and provided IL-3-independence and in vivo invasiveness to 32D cells. Additionally, these SEPT9-ABL1 isoforms were resistant to TKIs in vitro and in vivo, in comparison to BCR-ABL1. These findings demonstrated that SEPT9-ABL1 had oncogenic activity and conferred resistance to TKIs.
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20
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Tomita O, Iijima K, Ishibashi T, Osumi T, Kobayashi K, Okita H, Saito M, Mori T, Shimizu T, Kiyokawa N. Sensitivity of SNX2-ABL1 toward tyrosine kinase inhibitors distinct from that of BCR-ABL1. Leuk Res 2014; 38:361-70. [DOI: 10.1016/j.leukres.2013.11.017] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2013] [Revised: 11/20/2013] [Accepted: 11/23/2013] [Indexed: 12/21/2022]
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21
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Masuzawa A, Kiyotani C, Osumi T, Shioda Y, Iijima K, Tomita O, Nakabayashi K, Oboki K, Yasuda K, Sakamoto H, Ichikawa H, Hata K, Yoshida T, Matsumoto K, Kiyokawa N, Mori T. Poor responses to tyrosine kinase inhibitors in a child with precursor B-cell acute lymphoblastic leukemia with SNX2-ABL1 chimeric transcript. Eur J Haematol 2013; 92:263-7. [PMID: 24215620 DOI: 10.1111/ejh.12234] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/06/2013] [Indexed: 12/15/2022]
Abstract
In addition to BCR, various rare fusion partners for the ABL1 gene have been reported in leukemia. We have identified the fusion gene SNX2-ABL1 in a pediatric case of acute lymphoblastic leukemia (ALL), which has only once previously been reported in an adult patient. Cytogenetic analysis detected this fusion gene arising from a t(5;9)(q22;q34) translocation. ALL cells carrying a SNX2-ABL1 fusion exhibited a BCR-ABL1+ ALL-like gene expression profile. The patient poorly responded to dasatinib but partially responded to imatinib. Treatment using tyrosine kinase inhibitors requires further investigation to optimize the genotype-based treatment stratification for patients with SNX2-ABL1 fusion.
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Affiliation(s)
- Aki Masuzawa
- Division of Pediatric Oncology, National Center for Child Health and Development, Setagaya-ku, Japan
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22
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Mustjoki S, Auvinen K, Kreutzman A, Rousselot P, Hernesniemi S, Melo T, Lahesmaa-Korpinen AM, Hautaniemi S, Bouchet S, Molimard M, Smykla R, Lee FY, Vakkila J, Jalkanen S, Salmi M, Porkka K. Rapid mobilization of cytotoxic lymphocytes induced by dasatinib therapy. Leukemia 2012. [PMID: 23192016 DOI: 10.1038/leu.2012.348] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Tyrosine kinase inhibitors (TKIs) have potent effects on malignant cells, and they also target kinases in normal cells, which may have therapeutic implications. Using a collection of 55 leukemia patients treated with TKI therapy (chronic myeloid leukemia, n=47; acute lymphoblastic leukemia, n=8), we found that dasatinib, a second-generation broad-spectrum TKI, induced a rapid, dose-dependent and substantial mobilization of non-leukemic lymphocytes and monocytes in blood peaking 1-2 h after an oral intake and the blood counts closely mirrored drug plasma concentration. A preferential mobilization was observed for natural killer (NK), NK T, B and γδ+ T cells. Mobilization was coupled with a more effective transmigration of leukocytes through an endothelial cell layer and improved cytotoxicity of NK cells. Platelet numbers decreased markedly after the drug intake in a proportion of patients. Similar effects on blood cell dynamics and function were not observed with any other TKI (imatinib, nilotinib and bosutinib). Thus, dasatinib induces a unique, rapid mobilization and activation of cytotoxic, extravasation-competent lymphocytes, which may not only enhance antileukemia immune responses but can also be causally related to the side-effect profile of the drug (pleural effusions, thrombocytopenia).
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Affiliation(s)
- S Mustjoki
- Hematology Research Unit Helsinki, Department of Medicine, Division of Hematology, University of Helsinki and Helsinki University Central Hospital (HUCH), Helsinki, Finland
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23
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De Braekeleer E, Douet-Guilbert N, Guardiola P, Rowe D, Mustjoki S, Zamecnikova A, Al Bahar S, Jaramillo G, Berthou C, Bown N, Porkka K, Ochoa C, De Braekeleer M. Acute lymphoblastic leukemia associated with RCSD1-ABL1 novel fusion gene has a distinct gene expression profile from BCR-ABL1 fusion. Leukemia 2012; 27:1422-4. [PMID: 23168614 DOI: 10.1038/leu.2012.332] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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Gulzar ZG, McKenney JK, Brooks JD. Increased expression of NuSAP in recurrent prostate cancer is mediated by E2F1. Oncogene 2012; 32:70-7. [PMID: 22349817 PMCID: PMC3360134 DOI: 10.1038/onc.2012.27] [Citation(s) in RCA: 85] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Increasing evidence suggests that prostate cancer is overdiagnosed and overtreated, and prognostic biomarkers would aid in treatment selection. To define prognostic biomarkers for aggressive prostate cancer, we carried out gene-expression profiling of 98 prostate tumors and 52 benign adjacent prostate tissue samples with detailed clinical annotation. We identified 28 transcripts significantly associated with recurrence after radical prostatectomy including NuSAP, a protein that binds DNA to the mitotic spindle. Elevated NuSAP transcript levels were associated with poor outcome in two independent prostate cancer gene-expression datasets. To characterize the role and regulation of NuSAP in prostate cancer, we studied the expression of NuSAP in the LNCaP and PC3 human prostate cancer cell lines. Posttranscriptional silencing of the NuSAP gene severely hampered the ability of PC3 to invade and proliferate in vitro. The promoter region of the NuSAP gene contains two CCAAT boxes and binding sites for E2F. Transient transfection of an E2F1 cDNA and 431 bp of the NuSAP promoter demonstrated E2F1 as an important regulator of expression. Deletion of the E2F-binding site at nucleotide -246 negated the effects of E2F1 on NuSAP expression. Electrophoretic mobility shift assays demonstrated that nuclear extracts of cells overexpressing E2F1 bound directly to the E2F-binding site in the NuSAP promoter region. Finally, immunohistochemistry showed a strong correlation between E2F1 and NuSAP expression in human prostate cancer samples. NuSAP is a novel biomarker for prostate cancer recurrence after surgery and its overexpression appears to be driven in part by E2F1 activation.
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Affiliation(s)
- Z G Gulzar
- Department of Urology, Stanford University School of Medicine, Stanford, CA 94305-5118, USA
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25
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Chromosomal translocation t(1;9)(q24;q34) in acute lymphoblastic leukemia patient involving the ABL1 gene. Leuk Res 2011; 35:e149-50. [PMID: 21641035 DOI: 10.1016/j.leukres.2011.05.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2011] [Revised: 04/10/2011] [Accepted: 05/09/2011] [Indexed: 11/22/2022]
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Inokuchi K, Wakita S, Hirakawa T, Tamai H, Yokose N, Yamaguchi H, Dan K. RCSD1-ABL1-positive B lymphoblastic leukemia is sensitive to dexamethasone and tyrosine kinase inhibitors and rapidly evolves clonally by chromosomal translocations. Int J Hematol 2011; 94:255-260. [PMID: 21863287 DOI: 10.1007/s12185-011-0910-z] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2011] [Revised: 07/29/2011] [Accepted: 07/29/2011] [Indexed: 10/17/2022]
Abstract
Recently, RCSD1 was identified as a novel gene fusion partner of the ABL1 gene. The RCSD1 gene, located at 1q23, is involved in t(1;9)(q23;q34) translocation in acute B lymphoblastic leukemia. Here we describe RCSD1-ABL1-positive B-cell acute lymphoblastic leukemia (ALL) followed by rapid clonal evolution exhibiting three rare reciprocal translocations. We performed breakpoint analysis of the transcript expressed by the RCSD1-ABL1 fusion gene. RT-PCR and sequence analyses detected transcription of a single RCSD1-ABL1 fusion gene variant, which had breakpoints in exon 3 of RCSD1 and exon 4 of ABL1. The RCSD1 portion of the RCSD1-ABL1 fusion transcript consists of exons 1, 2, and 3. Tyrosine kinase inhibitors, imatinib and dasatinib, coadministered with dexamethasone achieved transient clinical effects in the present RCSD1-ABL1-positive ALL. However, leukemic cells rapidly became refractory to this treatment following the subsequent development of three additional reciprocal chromosomal translocations, t(5;16)(q33;q24), dic(18;20)(p11.2;q11.2) and t(10;19)(q24;p13.3). The present RCSD1-ABL1-positive ALL may represent a state of high chromosomal instability.
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Affiliation(s)
- Koiti Inokuchi
- Division of Hematology, Department of Internal Medicine, Nippon Medical School, 1-1-5 Sendagi, Bunkyo-ku, Tokyo, 113-8603, Japan.
| | - Satoshi Wakita
- Division of Hematology, Department of Internal Medicine, Nippon Medical School, 1-1-5 Sendagi, Bunkyo-ku, Tokyo, 113-8603, Japan
| | - Tsuneaki Hirakawa
- Division of Hematology, Department of Internal Medicine, Nippon Medical School, 1-1-5 Sendagi, Bunkyo-ku, Tokyo, 113-8603, Japan
| | - Hayato Tamai
- Division of Hematology, Department of Internal Medicine, Nippon Medical School, 1-1-5 Sendagi, Bunkyo-ku, Tokyo, 113-8603, Japan
| | - Norio Yokose
- Division of Hematology, Department of Internal Medicine, Nippon Medical School, 1-1-5 Sendagi, Bunkyo-ku, Tokyo, 113-8603, Japan
| | - Hiroki Yamaguchi
- Division of Hematology, Department of Internal Medicine, Nippon Medical School, 1-1-5 Sendagi, Bunkyo-ku, Tokyo, 113-8603, Japan
| | - Kazuo Dan
- Division of Hematology, Department of Internal Medicine, Nippon Medical School, 1-1-5 Sendagi, Bunkyo-ku, Tokyo, 113-8603, Japan
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27
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The two faces of myeloproliferative neoplasms: Molecular events underlying lymphoid transformation. Leuk Res 2011; 35:1279-85. [PMID: 21722956 DOI: 10.1016/j.leukres.2011.05.037] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2011] [Revised: 05/28/2011] [Accepted: 05/31/2011] [Indexed: 12/26/2022]
Abstract
Multipotent haematopoietic stem cells pass through stages of differentiation with the progressive loss of developmental options leading to the production of terminally differentiated mature blood cells. This process is regulated by soluble cytokines binding to a ligand specific cell surface receptor on a precursor cell. Key to signal transduction are tyrosine kinase proteins which can be divided into two sub families, the receptor protein tyrosine kinases which are transmembrane receptors and retain an intact catalytic kinase domain and the cytoplasmic tyrosine kinases which bind to cytokine receptors. Abnormalities of tyrosine kinase proteins are well recognised in myeloid malignancies, mutation in the cytoplasmic tyrosine kinase JAK2 (V617F) is key in the pathogenesis of myeloproliferative neoplasms, and translocations involving ABL key in the development of chronic myeloid leukaemia. However tyrosine kinase mutations are increasingly recognised to play a role in the pathogenesis of a wider range of haematological cancers. This review focuses on the role of deregulated tyrosine kinase genes either as part of novel fusion proteins involving FGFR1, PDGFRα, PDGFRβ, JAK2 and ABL, or as a consequence of point mutation in JAK1 or JAK2 in the development of precursor T and B lymphoid malignancies or mixed myeloid/lymphoid disorders. We also set out some of the postulated mechanisms which underlie the association of tyrosine kinase mutations with the development of lymphoid malignancy.
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28
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De Braekeleer E, Douet-Guilbert N, Rowe D, Bown N, Morel F, Berthou C, Férec C, De Braekeleer M. ABL1 fusion genes in hematological malignancies: a review. Eur J Haematol 2011; 86:361-71. [PMID: 21435002 DOI: 10.1111/j.1600-0609.2011.01586.x] [Citation(s) in RCA: 73] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Chromosomal rearrangements involving the ABL1 gene, leading to a BCR-ABL1 fusion gene, have been mainly associated with chronic myeloid leukemia and B-cell acute lymphoblastic leukemia (ALL). At present, six other genes have been shown to fuse to ABL1. The kinase domain of ABL1 is retained in all chimeric proteins that are also composed of the N-terminal part of the partner protein that often includes a coiled-coil or a helix-loop-helix domain. These latter domains allow oligomerization of the protein that is required for tyrosine kinase activation, cytoskeletal localization, and neoplastic transformation. Fusion genes that have a break in intron 1 or 2 (BCR-ABL1, ETV6-ABL1, ZMIZ1-ABL1, EML1-ABL1, and NUP214-ABL1) have transforming activity, although NUP214-ABL1 requires amplification to be efficient. The NUP214-ABL1 gene is the second most prevalent fusion gene involving ABL1 in malignant hemopathies, with a frequency of 5% in T-cell ALL. Both fusion genes (SFPQ-ABL1 and RCSD1-ABL1) characterized by a break in intron 4 of ABL1 are associated with B-cell ALL, as the chimeric proteins lacked the SH2 domain of ABL1. Screening for ABL1 chimeric genes could be performed in patients with ALL, more particularly in those with T-cell ALL because ABL1 modulates T-cell development and plays a role in cytoskeletal remodeling processes in T cells.
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Affiliation(s)
- Etienne De Braekeleer
- Université de Brest, Faculté de Médecine et des Sciences de la Santé, Brest Institut National de la Santé et de la Recherche Médicale (INSERM), Brest CHRU Brest, Hôpital Morvan, Service de Cytogénétique, Cytologie et Biologie de la Reproduction, Brest, France
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29
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Duhoux FP, Auger N, De Wilde S, Wittnebel S, Ameye G, Bahloula K, Van den Berg C, Libouton JM, Saussoy P, Grand FH, Demoulin JB, Poirel HA. The t(1;9)(p34;q34) fusing ABL1 with SFPQ, a pre-mRNA processing gene, is recurrent in acute lymphoblastic leukemias. Leuk Res 2011; 35:e114-7. [PMID: 21388681 DOI: 10.1016/j.leukres.2011.02.011] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2010] [Revised: 12/13/2010] [Accepted: 02/14/2011] [Indexed: 12/01/2022]
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30
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Ernst T, Score J, Deininger M, Hidalgo-Curtis C, Lackie P, Ershler WB, Goldman JM, Cross NCP, Grand F. Identification of FOXP1 and SNX2 as novel ABL1 fusion partners in acute lymphoblastic leukaemia. Br J Haematol 2011; 153:43-6. [PMID: 21391972 DOI: 10.1111/j.1365-2141.2010.08457.x] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We have identified two novel ABL1 fusion genes in two patients with B-cell acute lymphoblastic leukaemia (ALL) associated with a t(3;9)(p12;q34) and a t(5;9)(q23;q34), respectively. Molecular analysis revealed a FOXP1-ABL1 fusion for the t(3;9) and a SNX2-ABL1 fusion for the t(5;9). The fusions were confirmed by specific amplification of the genomic breakpoints using reverse transcription polymerase chain reaction. The identification of ALL with rare ABL1 fusion partners is important because the leukaemia may respond to tyrosine kinase inhibitors in the same way as ALL patients with a classical BCR-ABL1 fusion gene.
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Affiliation(s)
- Thomas Ernst
- University of Southampton School of Medicine, Southampton, UK
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