Cited by 171Cancer-related gene regulationAcute Myeloid Leukemia ResearchRetinoids in leukemia and cellular processes

The dual epigenetic role of PRMT5 in acute myeloid leukemia: gene activation and repression via histone arginine methylation

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Tarighat, S S, Santhanam, R, Frankhouser, D, Radomska, H S, Lai, H, Anghelina, M, Wang, H, Huang, X +9 more·2016·Leukemia

Abstract

Changes in the enzymatic activity of protein arginine methyltransferase (PRMT) 5 have been associated with cancer; however, the protein's role in acute myeloid leukemia (AML) has not been fully evaluated. Here, we show that increased PRMT5 activity enhanced AML growth in vitro and in vivo while PRMT5 downregulation reduced it. In AML cells, PRMT5 interacted with Sp1 in a transcription repressor complex and silenced miR-29b preferentially via dimethylation of histone 4 arginine residue H4R3. As Sp1 is also a bona fide target of miR-29b, the miR silencing resulted in increased Sp1. This event in turn led to transcription activation of FLT3, a gene that encodes a receptor tyrosine kinase. Inhibition of PRMT5 via sh/siRNA or a first-in-class small-molecule inhibitor (HLCL-61) resulted in significantly increased expression of miR-29b and consequent suppression of Sp1 and FLT3 in AML cells. As a result, significant antileukemic activity was achieved. Collectively, our data support a novel leukemogenic mechanism in AML where PRMT5 mediates both silencing and transcription of genes that participate in a 'yin-yang' functional network supporting leukemia growth. As FLT3 is often mutated in AML and pharmacologic inhibition of PRMT5 appears feasible, the PRMT5-miR-29b-FLT3 network should be further explored as a novel therapeutic target for AML.

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Authors
Tarighat, S. S., Santhanam, R., Frankhouser, D., Radomska, H. S., Lai, H., Anghelina, M., Wang, H., Huang, X., Alinari, L., Walker, A., Caligiuri, M. A., Croce, C. M., Li, L., Garzon, R., Li, C., Baiocchi, R. A., & Marcucci, G.
Affiliations
  • The Ohio State University Comprehensive Cancer Center – Arthur G. James Cancer Hospital and Richard J. Solove Research Institute (US)
  • The Ohio State University (US)
  • City Of Hope National Medical Center (US)
Corresponding author
Marcucci, G
Venue
Leukemia
Published
2015-11-05
Volume
30
Issue
4
Pages
789-799
ISSN
  • 0887-6924 (ISSN-L)
  • 1476-5551
OpenAlex
W2183418069
Cited by
169
References
47
Citations by year
2026: 5 · 2025: 17 · 2024: 13 · 2023: 19 · 2022: 17 · 2021: 17 · 2020: 17 · 2019: 21 · 2018: 14 · 2017: 20 · 2016: 8
FWCI
6.08
Type
journal article
Language
en
Open access
Locations
  • Leukemia (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Cancer Institute (P50CA140158, R01-CA140158, P30CA016058)
  • National Institute of Neurological Disorders and Stroke (R21NS071346)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Cancer-related gene regulation
  • Health Sciences › Medicine › Hematology › Acute Myeloid Leukemia Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Retinoids in leukemia and cellular processes
Keywords
PRMT5, acute myeloid leukemia, histone arginine methylation, Sp1, miR-29b, FLT3, transcriptional repression, transcriptional activation, protein arginine methyltransferase, therapeutic target
MeSH terms
Animals, Arginine, Flow Cytometry, Histones, Humans, Immunoenzyme Techniques, Protein-Arginine N-Methyltransferases, RNA, Messenger, Tumor Cells, Cultured, Blotting, Western, Leukemia, Myeloid, Acute, Transcriptional Activation, Down-Regulation, Gene Expression Regulation, Leukemic, Mice, SCID, Mice, Inbred NOD, Apoptosis, DNA Methylation, Reverse Transcriptase Polymerase Chain Reaction, Xenograft Model Antitumor Assays, RNA, Small Interfering, MicroRNAs, Epigenesis, Genetic, Chromatin Immunoprecipitation, Cell Proliferation, Mice, Epigenomics, Real-Time Polymerase Chain Reaction

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