5-Aminonaphthalene derivatives as selective nonnucleoside nuclear receptor binding SET domain-protein 2 (NSD2) inhibitors for the treatment of multiple myeloma

Eur J Med Chem. 2021 Oct 15;222:113592. doi: 10.1016/j.ejmech.2021.113592. Epub 2021 Jun 5.

Abstract

Approximately 20% of multiple myeloma (MM) are caused by a chromosomal translocation t (4; 14) that leads to the overexpression of the nuclear receptor binding SET domain-protein 2 (NSD2) histone methyltransferase. NSD2 catalyzes the methylation of lysine 36 on histone H3 (H3K36me2) and is associated with transcriptionally active regions. Using high-throughput screening (HTS) with biological analyses, a series of 5-aminonaphthalene derivatives were designed and synthesized as novel NSD2 inhibitors. Among all the prepared compounds, 9c displayed a good NSD2 inhibitory activity (IC50 = 2.7 μM) and selectivity against both SET-domain-containing and non-SET-domain-containing methyltransferases. Preliminary research indicates the inhibition mechanism of compound 9c by significantly suppressed the methylation of H3K36me2. Compound 9c specifically inhibits the proliferation of the human B cell precursor leukemia cell line RS4:11 and the human myeloma cell line KMS11 by inducing cell cycle arrest and apoptosis with little cytotoxicity. It has been reported that the anti-cancer effect of compound 9c is partly achieved by completely suppressing the transcriptional activation of NSD2-targeted genes. When administered intraperitoneally at 25 mg/kg, compound 9c suppressed the tumor growth of RS4:11 xenografts in vivo and no body weight loss was detected in the tested SCID mice.

Keywords: 5-Aminonaphthalene derivatives; HTS; Inhibitor; Methyltransferase; Multiple myeloma; NSD2.

MeSH terms

  • Antineoplastic Agents / chemical synthesis
  • Antineoplastic Agents / chemistry
  • Antineoplastic Agents / pharmacology*
  • Apoptosis / drug effects
  • Cell Cycle Checkpoints / drug effects
  • Cell Proliferation / drug effects
  • Cell Survival / drug effects
  • Dose-Response Relationship, Drug
  • Drug Screening Assays, Antitumor
  • Enzyme Inhibitors / chemical synthesis
  • Enzyme Inhibitors / chemistry
  • Enzyme Inhibitors / pharmacology*
  • Histone-Lysine N-Methyltransferase / antagonists & inhibitors*
  • Histone-Lysine N-Methyltransferase / metabolism
  • Humans
  • Molecular Structure
  • Multiple Myeloma / drug therapy*
  • Multiple Myeloma / metabolism
  • Multiple Myeloma / pathology
  • Naphthalenes / chemical synthesis
  • Naphthalenes / chemistry
  • Naphthalenes / pharmacology*
  • Repressor Proteins / antagonists & inhibitors*
  • Repressor Proteins / metabolism
  • Structure-Activity Relationship
  • Tumor Cells, Cultured

Substances

  • Antineoplastic Agents
  • Enzyme Inhibitors
  • Naphthalenes
  • Repressor Proteins
  • Histone-Lysine N-Methyltransferase
  • NSD2 protein, human