Cited by 64Acute Myeloid Leukemia ResearchEpigenetics and DNA MethylationChromatin Remodeling and Cancer

Global reduction of the epigenetic H3K79 methylation mark and increased chromosomal instability in CALM-AF10–positive leukemias

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Lin, Yi-Hui, Kakadia, Purvi M., Chen, Ying, Li, Ya-Qiang, Deshpande, Aniruddha J., Buske, Christian, Zhang, Kang-Ling, Zhang, Yi +2 more·2009·Blood

Abstract

Chromosomal translocations generating fusion proteins are frequently found in human leukemias. The fusion proteins play an important role in leukemogenesis by subverting the function of one or both partner proteins. The leukemogenic CALM-AF10 fusion protein is capable of interacting with the histone H3 lysine 79 (H3K79)–specific methyltransferase hDOT1L through the fused AF10 moiety. This interaction leads to local H3K79 hypermethylation on Hoxa5 loci, which up-regulates the expression of Hoxa5 and contributes to leukemogenesis. However, the long latency of leukemogenesis of CALM-AF10 transgenic mice suggests that the direct effects of fusion oncogene are not sufficient for the induction of leukemia. In this study, we show that the CALM-AF10 fusion protein can also greatly reduce global H3K79 methylation in both human and murine leukemic cells by disrupting the AF10-mediated association of hDOT1L with chromatin. Cells with reduced H3K79 methylation are more sensitive to γ-irradiation and display increased chromosomal instability. Consistently, leukemia patients harboring CALM-AF10 fusion have more secondary chromosomal aberrations. These findings suggest that chromosomal instability associated with global epigenetic alteration contributes to malignant transformation in certain leukemias, and that leukemias with this type of epigenetic alteration might benefit from treatment regimens containing DNA-damaging agents. This study is registered with www.clinicaltrials.gov as NCT00266136.

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Crossref · 10.1182/blood-2009-03-209395

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  • The feasibility of specifically directing either components of the DNA or histone methylation machinery for locus specific gene regulation in human cells ex vivo has already been established.

    “The feasibility of specifically directing either components of the DNA or histone methylation machinery for locus specific gene regulation in human cells ex vivo has already been established 208 .”

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  1. Hanahan D, Weinberg RA. The hallmarks of can- cer. Cell. 2000;100:57-70.

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Authors
Lin, Y.-H., Kakadia, P. M., Chen, Y., Li, Y.-Q., Deshpande, A. J., Buske, C., Zhang, K.-L., Zhang, Y., Xu, G.-L., & Bohlander, S. K.
Affiliations
  • Chinese Academy of Sciences (CN)
  • Helmholtz Munich (DE)
  • Mass Spectrometry Facility, Department of Biochemistry, School of Medicine, Loma Linda University, CA; and
  • University of North Carolina at Chapel Hill (US)
Venue
Blood
Published
2009-07-16
Volume
114
Issue
3
Pages
651-658
ISSN
  • 0006-4971 (ISSN-L)
  • 1528-0020
OpenAlex
W2039014113
Cited by
64
References
50
Citations by year
2026: 1 · 2023: 4 · 2022: 2 · 2021: 2 · 2020: 5 · 2019: 3 · 2018: 2 · 2017: 1 · 2016: 2 · 2015: 3 · 2014: 6 · 2013: 8 · 2012: 5
FWCI
5.47
Type
journal article
Language
en
Open access
Locations
  • Blood (publishedVersion)
  • PubMed (publishedVersion)
  • Site cant be reached (submittedVersion)
Funders
  • Deutsche Forschungsgemeinschaft (SFB 684)
  • National Natural Science Foundation of China
  • Max-Planck-Gesellschaft
Topics
  • Health Sciences › Medicine › Hematology › Acute Myeloid Leukemia Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Epigenetics and DNA Methylation
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Chromatin Remodeling and Cancer
Keywords
H3K79 methylation, DOT1L, chromosomal instability, chromosomal translocation, leukemia, epigenetic modifications, gamma-irradiation sensitivity, secondary chromosomal aberrations, malignant transformation, DNA-damaging agents, HOXA5
MeSH terms
Animals, Chromatin, Histones, Humans, Leukemia, Methylation, Methyltransferases, Histone-Lysine N-Methyltransferase, Transcription Factors, Tumor Cells, Cultured, Oncogene Proteins, Fusion, Chromosomal Instability, Epigenesis, Genetic, Mice

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