Targeting MLL1 H3K4 methyltransferase activity in mixed-lineage leukemia

Mol Cell. 2014 Jan 23;53(2):247-61. doi: 10.1016/j.molcel.2013.12.001. Epub 2014 Jan 2.

Abstract

Here we report a comprehensive characterization of our recently developed inhibitor MM-401 that targets the MLL1 H3K4 methyltransferase activity. MM-401 is able to specifically inhibit MLL1 activity by blocking MLL1-WDR5 interaction and thus the complex assembly. This targeting strategy does not affect other mixed-lineage leukemia (MLL) family histone methyltransferases (HMTs), revealing a unique regulatory feature for the MLL1 complex. Using MM-401 and its enantiomer control MM-NC-401, we show that inhibiting MLL1 methyltransferase activity specifically blocks proliferation of MLL cells by inducing cell-cycle arrest, apoptosis, and myeloid differentiation without general toxicity to normal bone marrow cells or non-MLL cells. More importantly, transcriptome analyses show that MM-401 induces changes in gene expression similar to those of MLL1 deletion, supporting a predominant role of MLL1 activity in regulating MLL1-dependent leukemia transcription program. We envision broad applications for MM-401 in basic and translational research.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Apoptosis / drug effects
  • Cell Cycle Checkpoints / drug effects
  • Cell Differentiation / drug effects
  • Cell Line, Tumor
  • Cell Proliferation
  • Histone Methyltransferases
  • Histone-Lysine N-Methyltransferase / antagonists & inhibitors*
  • Histone-Lysine N-Methyltransferase / chemistry
  • Histone-Lysine N-Methyltransferase / genetics
  • Histone-Lysine N-Methyltransferase / metabolism*
  • Histones / metabolism*
  • Humans
  • Intracellular Signaling Peptides and Proteins
  • Leukemia, Biphenotypic, Acute / enzymology*
  • Mice
  • Myeloid-Lymphoid Leukemia Protein / chemistry
  • Myeloid-Lymphoid Leukemia Protein / genetics
  • Myeloid-Lymphoid Leukemia Protein / metabolism*
  • Oligopeptides / chemistry
  • Oligopeptides / physiology
  • Proteins / metabolism
  • Proto-Oncogene Proteins c-bcl-2 / metabolism
  • Transcriptome / drug effects

Substances

  • Histones
  • Intracellular Signaling Peptides and Proteins
  • MM-401
  • Oligopeptides
  • Proteins
  • Proto-Oncogene Proteins c-bcl-2
  • Wdr5 protein, mouse
  • Myeloid-Lymphoid Leukemia Protein
  • Histone Methyltransferases
  • Histone-Lysine N-Methyltransferase
  • Kmt2a protein, mouse

Associated data

  • PDB/4GM9
  • SRA/SRP033036