Properly substituted analogues of BIX-01294 lose inhibition of G9a histone methyltransferase and gain selective anti-DNA methyltransferase 3A activity

PLoS One. 2014 May 8;9(5):e96941. doi: 10.1371/journal.pone.0096941. eCollection 2014.

Abstract

Chemical manipulations performed on the histone H3 lysine 9 methyltransferases (G9a/GLP) inhibitor BIX-01294 afforded novel desmethoxyquinazolines able to inhibit the DNA methyltransferase DNMT3A at low micromolar levels without any significant inhibition of DNMT1 and G9a. In KG-1 cells such compounds, when tested at sub-toxic doses, induced the luciferase re-expression in a stable construct controlled by a cytomegalovirus (CMV) promoter silenced by methylation (CMV-luc assay). Finally, in human lymphoma U-937 and RAJI cells, the N-(1-benzylpiperidin-4-yl)-2-(4-phenylpiperazin-1-yl)quinazolin-4-amine induced the highest proliferation arrest and cell death induction starting from 10 µM, in agreement with its DNMT3A inhibitory potency.

Publication types

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

MeSH terms

  • Azepines / chemistry*
  • Azepines / metabolism
  • Azepines / pharmacology*
  • Catalytic Domain
  • Cell Line, Tumor
  • Cell Proliferation / drug effects
  • Cell Survival / drug effects
  • DNA (Cytosine-5-)-Methyltransferases / antagonists & inhibitors*
  • DNA (Cytosine-5-)-Methyltransferases / chemistry
  • DNA (Cytosine-5-)-Methyltransferases / metabolism
  • Enzyme Inhibitors / chemistry*
  • Enzyme Inhibitors / metabolism
  • Enzyme Inhibitors / pharmacology*
  • Histocompatibility Antigens / chemistry
  • Histocompatibility Antigens / metabolism
  • Histone-Lysine N-Methyltransferase / antagonists & inhibitors*
  • Histone-Lysine N-Methyltransferase / chemistry
  • Histone-Lysine N-Methyltransferase / metabolism
  • Humans
  • Molecular Docking Simulation
  • Quinazolines / chemistry*
  • Quinazolines / metabolism
  • Quinazolines / pharmacology*
  • Structure-Activity Relationship

Substances

  • Azepines
  • BIX 01294
  • Enzyme Inhibitors
  • Histocompatibility Antigens
  • Quinazolines
  • DNA (Cytosine-5-)-Methyltransferases
  • DNA methyltransferase 3A
  • EHMT2 protein, human
  • Histone-Lysine N-Methyltransferase