1
|
Tang Z, Wang W, Yang S, El Achi H, Fang H, Nahmod KA, Toruner GA, Xu J, Thakral B, Ayoub E, Issa GC, Yin CC, You MJ, Miranda RN, Khoury JD, Medeiros LJ, Tang G. 3q26.2/ MECOM Rearrangements by Pericentric Inv(3): Diagnostic Challenges and Clinicopathologic Features. Cancers (Basel) 2023; 15:458. [PMID: 36672407 PMCID: PMC9856433 DOI: 10.3390/cancers15020458] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Revised: 01/04/2023] [Accepted: 01/09/2023] [Indexed: 01/13/2023] Open
Abstract
MECOM rearrangement (MECOM-R) resulting from 3q26.2 aberrations is often associated with myeloid neoplasms and inferior prognosis in affected patients. Uncommonly, certain 3q26.2/MECOM-R can be subtle/cryptic and consequently overlooked by karyotyping. We identified 17 acute myeloid leukemia (AML) patients (male/female: 13/4 with a median age of 67 years, range 42 to 85 years) with a pericentric inv(3) leading to MECOM-R, with breakpoints at 3p23 (n = 11), 3p25 (n = 3), 3p21 (n = 2) and 3p13 (n = 1) on 3p and 3q26.2 on 3q. These pericentric inv(3)s were overlooked by karyotyping initially in 16 of 17 cases and later detected by metaphase FISH analysis. Similar to the patients with classic/paracentric inv(3)(q21q26.2), patients with pericentric inv(3) exhibited frequent cytopenia, morphological dysplasia (especially megakaryocytes), -7/del(7q), frequent NRAS (n = 6), RUNX1 (n = 5) and FLT-3 (n = 4) mutations and dismal outcomes (median overall survival: 14 months). However, patients with pericentric inv(3) more frequently had AML with thrombocytopenia (n = 15, 88%), relative monocytosis in peripheral blood (n = 15, 88%), decreased megakaryocytes (n = 11, 65%), and lower SF3B1 mutation. We conclude that AML with pericentric inv(3) shares some similarities with AML associated with classic/paracentric inv(3)/GATA2::MECOM but also shows certain unique features. Pericentric inv(3)s are often subtle/cryptic by chromosomal analysis. A reflex FISH analysis for MECOM-R is recommended in myeloid neoplasms showing -7/del(7q).
Collapse
Affiliation(s)
- Zhenya Tang
- Department of Hematopathology, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Wei Wang
- Department of Hematopathology, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Su Yang
- Department of Hematopathology, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Hanadi El Achi
- Department of Hematopathology, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Hong Fang
- Department of Hematopathology, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Karen Amelia Nahmod
- Department of Hematopathology, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Gokce A. Toruner
- Department of Hematopathology, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Jie Xu
- Department of Hematopathology, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Beenu Thakral
- Department of Hematopathology, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Edward Ayoub
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Ghayas C. Issa
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - C. Cameron Yin
- Department of Hematopathology, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - M. James You
- Department of Hematopathology, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Roberto N. Miranda
- Department of Hematopathology, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Joseph D. Khoury
- Department of Hematopathology, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - L. Jeffrey Medeiros
- Department of Hematopathology, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Guilin Tang
- Department of Hematopathology, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| |
Collapse
|
2
|
Myeloid neoplasms associated with t(3;12)(q26.2;p13) are clinically aggressive, show myelodysplasia, and frequently harbor chromosome 7 abnormalities. Mod Pathol 2021; 34:300-313. [PMID: 33110238 DOI: 10.1038/s41379-020-00663-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2020] [Revised: 08/12/2020] [Accepted: 08/13/2020] [Indexed: 01/13/2023]
Abstract
Sporadic reports of t(3;12)(q26.2;p13) indicate that this abnormality is associated with myeloid neoplasms, myelodysplasia, and a poor prognosis. To better characterize neoplasms with this abnormality, we assessed 20 patients utilizing clinicopathological data, cytogenetic, and targeted next-generation sequencing analysis. We also performed literature review of 58 prior reported cases. Patients included ten men and ten women with median age 55.8 years (range, 27.8-78.8). Diagnoses included 11 acute myeloid leukemia (AML, 5 de novo and 6 secondary), 5 myelodysplastic syndromes (MDS, 3 de novo excess blasts-2 and 2 therapy-related), 2 chronic myeloid leukemia BCR-ABL1-positive blast phase (1 de novo and 1 secondary), 1 primary myelofibrosis (secondary), and 1 mixed-phenotype acute leukemia T/myeloid (MPAL, secondary). Morphologic dysplasia was identified in all AML cases (5/5), MDS cases (4/4), therapy-related cases (3/3), half of myeloproliferative neoplasm cases (1/2), and one MPAL case assessed. The t(3;12) was detected de novo and in subsequent workups in 9 and 11 patients, respectively. Seven patients had t(3;12) only and eight patients had additional chromosome 7 abnormalities. Fluorescence in-situ hybridization detected MECOM (n = 11) and ETV6 (n = 7) rearrangements in all cases assessed. FLT3 internal tandem duplication was identified in five (25%) patients. We identified 13 genetic abnormalities in the de novo group (n = 9), and 25 in the secondary disease group (n = 11). All patients received chemotherapy, with seven allogeneic and two autologous stem cell transplantations. At last follow-up, 14 (70%) patients died with median survival of 6.3 months (range, 0.1-17.3) after detection of t(3;12). In summary, t(3;12)(q26.2;p13) is a rare cytogenetic abnormality in myeloid neoplasms. Myelodysplasia, chromosome 7 abnormalities, and high blast counts are common, and the prognosis is poor. Given the close relationship between the presence of this cytogenetic abnormality and the MDS-related changes, we recommend adding t(3;12)(q26.2;p13) to the list of AML with myelodysplasia-related changes defining abnormalities of the World Health Organization 2017 classification of myeloid neoplasms.
Collapse
|
3
|
Yamamoto K, Yakushijin K, Ichikawa H, Okamura A, Nagao S, Kakiuchi S, Kurata K, Kawamoto S, Matsui K, Nakamachi Y, Saegusa J, Matsuoka H, Minami H. Coexpression of ETV6/MDS1/EVI1 and ETV6/EVI1 fusion transcripts in acute myeloid leukemia with t(3;12)(q26.2;p13) and thrombocytosis. Leuk Lymphoma 2019; 60:1294-1298. [PMID: 30526151 DOI: 10.1080/10428194.2018.1529311] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2018] [Revised: 09/13/2018] [Accepted: 09/22/2018] [Indexed: 10/27/2022]
MESH Headings
- Bone Marrow/pathology
- Cell Line, Tumor
- Chromosomes, Human, Pair 12
- Chromosomes, Human, Pair 3
- DNA Mutational Analysis
- Gene Expression Regulation, Leukemic
- Humans
- Karyotype
- Leukemia, Myeloid, Acute/genetics
- MDS1 and EVI1 Complex Locus Protein/genetics
- Male
- Oncogene Proteins, Fusion/genetics
- Proto-Oncogene Proteins c-ets/genetics
- Repressor Proteins/genetics
- Thrombocytosis/genetics
- Translocation, Genetic
- Young Adult
- ETS Translocation Variant 6 Protein
Collapse
Affiliation(s)
- Katsuya Yamamoto
- a Division of Medical Oncology/Hematology, Department of Medicine , Kobe University Graduate School of Medicine , Kobe , Japan
| | - Kimikazu Yakushijin
- a Division of Medical Oncology/Hematology, Department of Medicine , Kobe University Graduate School of Medicine , Kobe , Japan
| | - Hiroya Ichikawa
- a Division of Medical Oncology/Hematology, Department of Medicine , Kobe University Graduate School of Medicine , Kobe , Japan
| | - Atsuo Okamura
- a Division of Medical Oncology/Hematology, Department of Medicine , Kobe University Graduate School of Medicine , Kobe , Japan
| | - Shigeki Nagao
- a Division of Medical Oncology/Hematology, Department of Medicine , Kobe University Graduate School of Medicine , Kobe , Japan
| | - Seiji Kakiuchi
- a Division of Medical Oncology/Hematology, Department of Medicine , Kobe University Graduate School of Medicine , Kobe , Japan
| | - Keiji Kurata
- a Division of Medical Oncology/Hematology, Department of Medicine , Kobe University Graduate School of Medicine , Kobe , Japan
| | - Shinichiro Kawamoto
- a Division of Medical Oncology/Hematology, Department of Medicine , Kobe University Graduate School of Medicine , Kobe , Japan
| | - Keiji Matsui
- b Department of Clinical Laboratory , Kobe University Hospital , Kobe , Japan
| | - Yuji Nakamachi
- b Department of Clinical Laboratory , Kobe University Hospital , Kobe , Japan
| | - Jun Saegusa
- b Department of Clinical Laboratory , Kobe University Hospital , Kobe , Japan
| | - Hiroshi Matsuoka
- b Department of Clinical Laboratory , Kobe University Hospital , Kobe , Japan
| | - Hironobu Minami
- b Department of Clinical Laboratory , Kobe University Hospital , Kobe , Japan
| |
Collapse
|
4
|
Abstract
Key Points
Leukemic cells in an inv(3)(q21q26) EVI1 misexpression mouse model are able to differentiate toward myeloid lineage. Gata2 heterozygous deletion accelerates EVI1 misexpression leukemia by inducing a proliferation and differentiation defect in leukemia cells.
Collapse
|
5
|
Rasighaemi P, Ward AC. ETV6 and ETV7: Siblings in hematopoiesis and its disruption in disease. Crit Rev Oncol Hematol 2017; 116:106-115. [PMID: 28693791 DOI: 10.1016/j.critrevonc.2017.05.011] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2017] [Revised: 05/05/2017] [Accepted: 05/28/2017] [Indexed: 01/07/2023] Open
Abstract
ETV6 (TEL1) and ETV7 (TEL2) are closely-related members of the ETS family of transcriptional regulators. Both ETV6 and ETV7 have been demonstrated to play key roles in hematopoiesis, particularly with regard to maintenance of hematopoietic stem cells and control of lineage-specific differentiation, with evidence of functional interactions between both proteins. ETV6 has been strongly implicated in the molecular etiology of a number of hematopoietic diseases, including as a tumor suppressor, an oncogenic fusion partner, and an important regulator of thrombopoiesis, but recent evidence has also identified ETV7 as a potential oncogene in certain malignancies. This review provides an overview of ETV6 and ETV7 and their contribution to both normal and disrupted hematopoiesis. It also highlights the key clinical implications of the growing knowledge base regarding ETV6 abnormalities with respect to prognosis and treatment.
Collapse
Affiliation(s)
- Parisa Rasighaemi
- School of Medicine and Centre for Molecular and Medical Research, Deakin University, Geelong, Victoria, 3216, Australia.
| | - Alister C Ward
- School of Medicine and Centre for Molecular and Medical Research, Deakin University, Geelong, Victoria, 3216, Australia.
| |
Collapse
|
6
|
Bennour A, Tabka I, Ben Youssef Y, Kmeira Z, Khelif A, Saad A, Sennana H. A novel t(3;12)(q21;p13) translocation in a patient with accelerated chronic myeloid leukemia after imatinib and nilotinib therapy. Cancer Biol Med 2013; 10:47-51. [PMID: 23691445 PMCID: PMC3643689 DOI: 10.7497/j.issn.2095-3941.2013.01.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2012] [Accepted: 03/07/2013] [Indexed: 11/23/2022] Open
Abstract
The acquisition of secondary chromosomal aberrations in chronic myeloid leukemia (CML) patients with Philadelphia chromosome-positive (Ph+) karyotype signifies clonal evolution associated with the progression of the disease to its accelerated or blastic phase. Therefore, these aberrations have clinical and biological significance. T(3;12)(q26;p13), which is a recurrent chromosomal aberration observed in myeloid malignancies, is typically associated with dysplasia of megakaryocytes, multilineage involvement, short duration of any blastic phase, and extremely poor prognosis. We have identified a recurrent reciprocal translocation between chromosomes 3 and 12 with different breakpoint at bands 3q21 in the malignant cells from a 28-year-old man. The patient was initially diagnosed as having Ph+ CML in the chronic phase. The t(3;12)(q21;p13) translocation occurred 4 years after the patient was first diagnosed with CML while undergoing tyrosine kinase inhibitor therapy. We confirmed the t(3;12)(q21;p13) translocation via fluorescence in situ hybridization assay by using whole-chromosome paint probes for chromosomes 3 and 12. Our findings demonstrate that, similar to other recurrent translocations involving 3q26 such as t(3;3) and t(3;21), the t(3;12)(q21;p13) translocation is implicated not only in myelodysplastic syndrome and acute myeloid leukemia but also in the progression of CML. These findings extend the disease spectrum of this cytogenetic aberration.
Collapse
Affiliation(s)
- Ayda Bennour
- Department of Cytogenetics, Molecular Genetics and Reproductive Biology, Farhat Hached University Teaching Hospital, Sousse 4000, Tunisia
| | | | | | | | | | | | | |
Collapse
|
7
|
Shimada K, Tomita A, Minami Y, Abe A, Hind CK, Kiyoi H, Cragg MS, Naoe T. CML cells expressing the TEL/MDS1/EVI1 fusion are resistant to imatinib-induced apoptosis through inhibition of BAD, but are resensitized with ABT-737. Exp Hematol 2012; 40:724-737.e2. [PMID: 22634393 DOI: 10.1016/j.exphem.2012.05.007] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2012] [Revised: 05/02/2012] [Accepted: 05/19/2012] [Indexed: 11/16/2022]
Abstract
Chronic myeloid leukemia is the first disease in which the potential of molecular targeted therapy with tyrosine kinase inhibitors (TKIs) was realized. Despite this success, a proportion of patients, particularly with advanced disease, are, or become, resistant to this treatment. Overcoming resistance and uncovering the underlying mechanisms is vital for further improvement of clinical outcomes. Here we report the identification, development, and characterization of a novel chronic myeloid leukemia cell line carrying the additional chromosomal aberration t(3;12)(q26;p13) resulting in expression of the TEL/MDS1/EVI1 fusion protein, which is resistant to TKIs. Resistance to TKIs was overcome by the co-administration of the BH3-mimetic, ABT-737. In addition, application of EVI1-specific small interfering RNA decreased expression of the TEL/MDS1/EVI1 fusion, reduced resistance to imatinib, and increased sensitivity to ABT-737. Subsequent studies revealed a role for the BH3-only protein BAD, probably via a phosphoinositide 3-kinase/AKT-dependent pathway, as pharmacological inhibition of AKT could also resensitize cells to death from TKIs. These findings indicate a novel pathway of TKI resistance regulated by EVI1 proteins and provide a promising means for overcoming resistance in chronic myeloid leukemia and other hematological malignancies displaying EVI1 overexpression.
Collapse
MESH Headings
- Adult
- Antineoplastic Agents/pharmacology
- Apoptosis/drug effects
- Apoptosis/genetics
- Benzamides
- Biphenyl Compounds/pharmacology
- Cell Line, Tumor
- Chromosomes, Human, Pair 12/genetics
- Chromosomes, Human, Pair 3/genetics
- DNA-Binding Proteins/genetics
- DNA-Binding Proteins/metabolism
- Dose-Response Relationship, Drug
- Drug Resistance, Neoplasm/drug effects
- Drug Resistance, Neoplasm/genetics
- Female
- Humans
- Imatinib Mesylate
- Immunoblotting
- K562 Cells
- Karyotyping
- Leukemia, Myelogenous, Chronic, BCR-ABL Positive/genetics
- Leukemia, Myelogenous, Chronic, BCR-ABL Positive/metabolism
- Leukemia, Myelogenous, Chronic, BCR-ABL Positive/pathology
- MDS1 and EVI1 Complex Locus Protein
- Nitrophenols/pharmacology
- Oncogene Proteins, Fusion/genetics
- Oncogene Proteins, Fusion/metabolism
- Piperazines/pharmacology
- Protein Kinase Inhibitors/pharmacology
- Proto-Oncogene Proteins c-akt/antagonists & inhibitors
- Proto-Oncogene Proteins c-akt/metabolism
- Proto-Oncogene Proteins c-ets/genetics
- Proto-Oncogene Proteins c-ets/metabolism
- Proto-Oncogenes/genetics
- Pyrimidines/pharmacology
- RNA Interference
- Repressor Proteins/genetics
- Repressor Proteins/metabolism
- Sulfonamides/pharmacology
- Transcription Factors/genetics
- Transcription Factors/metabolism
- Translocation, Genetic
- bcl-Associated Death Protein/antagonists & inhibitors
- bcl-Associated Death Protein/metabolism
- ETS Translocation Variant 6 Protein
Collapse
Affiliation(s)
- Kazuyuki Shimada
- Institute for Advanced Research, Nagoya University, Nagoya, Japan.
| | | | | | | | | | | | | | | |
Collapse
|
8
|
De Braekeleer E, Douet-Guilbert N, Morel F, Le Bris MJ, Basinko A, De Braekeleer M. ETV6 fusion genes in hematological malignancies: a review. Leuk Res 2012; 36:945-61. [PMID: 22578774 DOI: 10.1016/j.leukres.2012.04.010] [Citation(s) in RCA: 135] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2012] [Revised: 03/13/2012] [Accepted: 04/16/2012] [Indexed: 01/01/2023]
Abstract
Translocations involving band 12p13 are one of the most commonly observed chromosomal abnormalities in human leukemia and myelodysplastic syndrome. Their frequently result in rearrangements of the ETV6 gene. At present, 48 chromosomal bands have been identified to be involved in ETV6 translocations, insertions or inversions and 30 ETV6 partner genes have been molecularly characterized. The ETV6 protein contains two major domains, the HLH (helix-loop-helix) domain, encoded by exons 3 and 4, and the ETS domain, encoded by exons 6 through 8, with in between the internal domain encoded by exon 5. ETV6 is a strong transcriptional repressor, acting through its HLH and internal domains. Five potential mechanisms of ETV6-mediated leukemogenesis have been identified: constitutive activation of the kinase activity of the partner protein, modification of the original functions of a transcription factor, loss of function of the fusion gene, affecting ETV6 and the partner gene, activation of a proto-oncogene in the vicinity of a chromosomal translocation and dominant negative effect of the fusion protein over transcriptional repression mediated by wild-type ETV6. It is likely that ETV6 is frequently involved in leukemogenesis because of the large number of partners with which it can rearrange and the several pathogenic mechanisms by which it can lead to cell transformation.
Collapse
Affiliation(s)
- Etienne De Braekeleer
- Laboratoire d'Histologie, Embryologie et Cytogénétique, Université de Brest, Brest, France
| | | | | | | | | | | |
Collapse
|
9
|
Roy S, Jørgensen HG, Roy P, Abed El Baky M, Melo JV, Strathdee G, Holyoake TL, Bartholomew C. BCR-ABL1 tyrosine kinase sustained MECOM expression in chronic myeloid leukaemia. Br J Haematol 2012; 157:446-56. [PMID: 22372463 DOI: 10.1111/j.1365-2141.2012.09078.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2011] [Accepted: 02/01/2012] [Indexed: 01/21/2023]
Abstract
MECOM oncogene expression correlates with chronic myeloid leukaemia (CML) progression. Here we show that the knockdown of MECOM (E) and MECOM (ME) isoforms reduces cell division at low cell density, inhibits colony-forming cells by 34% and moderately reduces BCR-ABL1 mRNA and protein expression but not tyrosine kinase catalytic activity in K562 cells. We also show that both E and ME are expressed in CD34(+) selected cells of both CML chronic phase (CML-CP), and non-CML (normal) origin. Furthermore, MECOM mRNA and protein expression were repressed by imatinib mesylate treatment of CML-CP CD34(+) cells, K562 and KY01 cell lines whereas imatinib had no effect in non-CML BCR-ABL1 -ve CD34(+) cells. Together these results suggest that BCR-ABL1 tyrosine kinase catalytic activity regulates MECOM gene expression in CML-CP progenitor cells and that the BCR-ABL1 oncoprotein partially mediates its biological activity through MECOM. MECOM gene expression in CML-CP progenitor cells would provide an in vivo selective advantage, contributing to CML pathogenesis.
Collapse
Affiliation(s)
- Swagata Roy
- Department of Life Sciences, City Campus, Glasgow Caledonian University, Glasgow, UK
| | | | | | | | | | | | | | | |
Collapse
|
10
|
Translocation t(12;13)(p13;q14) in a patient with imatinib-sensitive MDS/MPD associated with resistance to treatment. Anticancer Drugs 2011; 22:944-7. [DOI: 10.1097/cad.0b013e3283486ca4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
11
|
Jalali GR, An Q, Konn ZJ, Worley H, Wright SL, Harrison CJ, Strefford JC, Martineau M. Disruption of ETV6 in intron 2 results in upregulatory and insertional events in childhood acute lymphoblastic leukaemia. Leukemia 2008; 22:114-23. [PMID: 17972957 DOI: 10.1038/sj.leu.2404994] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2007] [Revised: 09/12/2007] [Accepted: 09/13/2007] [Indexed: 11/09/2022]
Abstract
We describe four cases of childhood B-cell progenitor acute lymphoblastic leukaemia (BCP-ALL) and one of T-cell (T-ALL) with unexpected numbers of interphase signals for ETV6 with an ETV6-RUNX1 fusion probe. Three fusion negative cases each had a telomeric part of 12p terminating within intron 2 of ETV6, attached to sequences from 5q, 7p and 7q, respectively. Two fusion positive cases, with partial insertions of ETV6 into chromosome 21, also had a breakpoint in intron 2. Fluorescence in situ hybridisation (FISH), array comparative genomic hybridization (aCGH) and Molecular Copy-Number Counting (MCC) results were concordant for the T-cell case. Sequences downstream of TLX3 on chromosome 5 were deleted, leaving the intact gene closely apposed to the first two exons of ETV6 and its upstream promoter. qRT-PCR showed a significant upregulation of TLX3. In this study we provide the first incontrovertible evidence that the upstream promoter of ETV6 attached to the first two exons of the gene was responsible for the ectopic expression of a proto-oncogene that became abnormally close as the result of deletion and translocation. We have also shown breakpoints in intron 2 of ETV6 in two cases of insertion with ETV6-RUNX1 fusion.
Collapse
Affiliation(s)
- G R Jalali
- Leukaemia Research Cytogenetics Group, Cancer Sciences Division, University of Southampton, Southampton, UK
| | | | | | | | | | | | | | | |
Collapse
|
12
|
Abstract
Leukemia is a group of monoclonal diseases that arise from hematopoietic stem and progenitor cells in the bone marrow or other hematopoietic organs. Retroviral infections are one of the major events leading to leukemogenesis in mice, because retroviruses can induce hematopoietic disease via the insertional mutagenesis of oncogenes; therefore, the cloning of viral-integration sites in murine leukemia has provided valuable molecular tags for oncogene discovery. Transcription of the murine gene ecotropic viral-integration site 1 (Evi1) is activated by nearby viral integration. In humans, the Evi1 homologue EVI1 is activated by chromosomal translocations. This review discusses the roles of the overexpression of EVI1/MEL1 gene family members in leukemogenesis, the relationships of various translocations in EVI1 overexpression, and the importance of PR domains in tumor suppression and oncogenesis. The functions of EVI1/MEL1 members as transcription factors and the concept of EVI1-positive leukemia as a stem cell disease are also reviewed.
Collapse
Affiliation(s)
- Kazuhiro Morishita
- Division of Tumor and Cellular Biochemistry, Department of Medical Sciences, University of Miyazaki, Miyazaki, Japan.
| |
Collapse
|
13
|
Huang M, Li C, Liang H, Zhou J, Deng J, Liu W. Multiplex reverse transcription-polymerase chain reaction for simultaneous screening of 29 chromosomal translocation in hematologic malignancies. JOURNAL OF HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY. MEDICAL SCIENCES = HUA ZHONG KE JI DA XUE XUE BAO. YI XUE YING DE WEN BAN = HUAZHONG KEJI DAXUE XUEBAO. YIXUE YINGDEWEN BAN 2006; 26:661-3. [PMID: 17357482 DOI: 10.1007/s11596-006-0608-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
Multiplex reverse transcription-polymerase chain reaction (M-RT-PCR) has been proved to possess great clinical potential for simultaneous screening of 29 chromosomal translocations in acute leukemia. To evaluate the clinical value of M-RT-PCR in hematologic malignancies, bone marrow samples from 90 patients with various hematologic malignancies, including 25 acute myelogenous leukemia (AML), 22 acute lymphoblastic leukemia (ALL), 27 chronic myelogenous leukemia (CML), 4 myeloproliferative diseases (MPD), 3 chronic lymphoblastic leukemia (CLL), 3 non-Hodgkin's lymphoma (NHL), 3 myelodysplastic syndrome (MDS), 2 multiple myeloma (MM) and 1 malignant histiocytosis (MH) were subjected to both M-RT-PCR and chromosome karyotypic analysis. Some of cases were subjected to follow-up examination of M-RT-PCR during the period of clinical complete remission (CR) for detection of minimal residual leukemia. In our hand, 12 of 29 chromosomal translocation transcripts including TEL/PDGFR, DEK/CAN, MLL/AF6, AML1/ETO, MLL/AF9, BCR/ABL, MLL/MLL, PML/RARu, TLS/ERG, E2A/HLF, EVI1 and HOXI1 were detected in 57 cases (63.3 %) of the 90 samples, which were in consistency with the results of karyotypic analysis. Furthermore, M-RT-PCR had also shown good clinical relevance when used as an approach to detect minimal residual leukemia. We concluded that M-RT-PCR could be used as an efficient and fast diagnostic tool not only in the initial diagnosis of hematologic malignancies but also in subsequent monitor of minimal residual leukemia.
Collapse
Affiliation(s)
- Mei Huang
- Department of Hematology, Tongji Hospital, Tongji Medical College Huazhong University of Science and Technology, Wuhan 430030, China
| | | | | | | | | | | |
Collapse
|
14
|
Abstract
Alterations of the ets family transcription factor ETV6 (TEL) and the RUNT domain transcription factor RUNX1 (AML1) play pivotal roles in the leukemogenesis of various types of leukemia. While only three fusion partners of RUNX1 namely ETO, ETV6 and MTG16 have been described so far, there is a plethora of ETV6 fusion partners with about 20 partners described so far. Apart from forming fusion genes there are other genetic alterations of ETV6 including deletions, point mutations and possible alterations at the promoter level that might contribute to the malignant phenotype. This review will focus on ETV6 and on the different mechanisms that are used by this gene to cause leukemia.
Collapse
Affiliation(s)
- Stefan K Bohlander
- Department of Medicine III, University Hospital Grosshadern, Marchioninistr. 15, D-81377 Munich, Germany.
| |
Collapse
|
15
|
Shah R, Rowland B, Richkind K, Mowery-Rushton P, Roherty S, Morgan R, Schlam M. Translocation (3;12)(q25;p11.2): a recurrent cytogenetic abnormality in acute myeloid leukemia. ACTA ACUST UNITED AC 2005; 156:186-7. [PMID: 15642404 DOI: 10.1016/j.cancergencyto.2004.04.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
16
|
Keung YK, Beaty M, Steward W, Jackle B, Pettnati M. Chronic myelocytic leukemia with eosinophilia, t(9;12)(q34;p13), and ETV6-ABL gene rearrangement: case report and review of the literature. CANCER GENETICS AND CYTOGENETICS 2002; 138:139-42. [PMID: 12505259 DOI: 10.1016/s0165-4608(02)00609-x] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Chronic myelocytic leukemia (CML) is a chronic myeloproliferative disorder characterized by cytogenetic or molecular evidence of Philadelphia (Ph) chromosome, t(9;22)(q34;q11). Mild to moderate eosinophilia is commonly seen in CML. However, eosinophilia as a dominant feature of CML is extremely rare. We describe a case of Ph(-) CML with eosinophilia. Loeffler endocarditis, and t(9;12)(q34;p13) that resulted in an ETV6-ABL gene rearrangement/fusion identified to the best of our knowledge, for the first time by using commercially available fluorescence in situ hybridization probes.
Collapse
MESH Headings
- Adult
- Aged
- Chromosomes, Human, Pair 12/genetics
- Chromosomes, Human, Pair 9/genetics
- Eosinophilia/complications
- Eosinophilia/genetics
- Female
- Fusion Proteins, bcr-abl/genetics
- Humans
- In Situ Hybridization, Fluorescence
- Leukemia, Myelogenous, Chronic, BCR-ABL Positive/complications
- Leukemia, Myelogenous, Chronic, BCR-ABL Positive/genetics
- Male
- Middle Aged
- Oncogene Proteins, Fusion/genetics
- Philadelphia Chromosome
- Protein-Tyrosine Kinases
- Reverse Transcriptase Polymerase Chain Reaction
- Translocation, Genetic/genetics
Collapse
Affiliation(s)
- Yi Kong Keung
- Department of Internal Medicine, Section on Hematology, and Oncology, Comprehensive Cancer Center, Winston-Salem, NC 27157, USA.
| | | | | | | | | |
Collapse
|