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Wang Z, Shi Y, Liu H, Liang Z, Zhu Q, Wang L, Tang B, Miao S, Ma N, Cen X, Ren H, Dong Y. Establishment and characterization of a DOT1L inhibitor-sensitive human acute monocytic leukemia cell line YBT-5 with a novel KMT2A-MLLT3 fusion. Hematol Oncol 2019; 37:617-625. [PMID: 31701557 DOI: 10.1002/hon.2686] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2019] [Revised: 09/22/2019] [Accepted: 10/01/2019] [Indexed: 11/07/2022]
Abstract
Immortalized cell lines are useful for deciphering the pathogenesis of acute leukemia and developing novel therapeutic agents against this malignancy. In this study, a new human myeloid leukemia cell line YBT-5 was established. After more than 1-year cultivation from the bone marrow of a patient with acute monocytic leukemia, YBT cell line was established. Then a subclone, YBT-5, was isolated from YBT using single cell sorting. Morphological and cytogenetical characterizations of the YBT-5 cell line were determined by cytochemical staining, flow cytometry analysis, and karyotype analysis. Molecular features were identified by transcriptomic analysis and reverse transcription-polymerase chain reaction. To establish a tumor model, 5 × 106 YBT-5 cells were injected subcutaneously in nonobese diabetic/severe combined immune-deficiency (NOD/SCID) mice. DOT1L has been proposed as a potential therapeutic target for KMT2A-related leukemia; therefore, to explore the potential application of this new cell line, its sensitivity to a specific DOT1L inhibitor, EPZ004777 was measured ex vivo. The growth of YBT-5 does not depend on granulocyte-macrophage colony-stimulating factor. Cytochemical staining showed that α-naphthyl acetate esterase staining was positive and partially inhibited by sodium fluoride, while peroxidase staining was negative. Flow cytometry analysis of YBT-5 cells showed positive myeloid and monocytic markers. Karyotype analysis of YBT-5 showed 48,XY,+8,+8. The breakpoints between KMT2A exon 10 and exon 11 (KMT2A exon 10/11) and MLLT3 exon 5 and exon 6 (MLLT3 exon 5/6) were identified, which was different from all known breakpoint locations, and a novel fusion transcript KMT2A exon 10/MLLT3 exon 6 was formed. A tumor model was established successfully in NOD/SCID mice. EPZ004777 could inhibit the proliferation and induce the differentiation of YBT-5 cells. Therefore, a new acute monocytic leukemia cell line with clear biological and molecular features was established and may be used in the research and development of new agents targeting KMT2A-associated leukemia.
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Affiliation(s)
- Zhenhua Wang
- Department of Hematology, Peking University First Hospital, Beijing, China
| | - Yongjin Shi
- Department of Hematology, Peking University First Hospital, Beijing, China
| | - Huihui Liu
- Department of Hematology, Peking University First Hospital, Beijing, China
| | - Zeyin Liang
- Department of Hematology, Peking University First Hospital, Beijing, China
| | - Qiang Zhu
- Department of Hematology, Peking University First Hospital, Beijing, China
| | - Lihong Wang
- Department of Hematology, Peking University First Hospital, Beijing, China
| | - Bo Tang
- Department of Hematology, Peking University First Hospital, Beijing, China
| | - Shengchao Miao
- Department of Hematology, Peking University First Hospital, Beijing, China
| | - Ning Ma
- Department of Hematology, Peking University First Hospital, Beijing, China
| | - Xinan Cen
- Department of Hematology, Peking University First Hospital, Beijing, China
| | - Hanyun Ren
- Department of Hematology, Peking University First Hospital, Beijing, China
| | - Yujun Dong
- Department of Hematology, Peking University First Hospital, Beijing, China
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Hoffmann C, Bachran C, Stanke J, Elezkurtaj S, Kaufmann AM, Fuchs H, Loddenkemper C, Schneider A, Cichon G. Creation and characterization of a xenograft model for human cervical cancer. Gynecol Oncol 2010; 118:76-80. [DOI: 10.1016/j.ygyno.2010.03.019] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2009] [Revised: 03/26/2010] [Accepted: 03/29/2010] [Indexed: 11/25/2022]
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