Identification of a Novel TAR RNA-Binding Protein 2 Modulator with Potential Therapeutic Activity against Hepatocellular Carcinoma

J Med Chem. 2021 Jun 10;64(11):7404-7421. doi: 10.1021/acs.jmedchem.1c00018. Epub 2021 May 26.

Abstract

Imbalance miRNAs contribute to tumor formation; therefore, the development of small-molecule compounds that regulate miRNA biogenesis is an important strategy in oncotherapy. Here, (-)-Gomisin M1 (GM) was found to modulate miRNA biogenesis to inhibit the proliferation, migration, and invasion of hepatocellular carcinoma (HCC) cells. GM modulated expression profiles of miRNA and protein in HCC cells and suppressed tumor growth in a mouse model. Mechanistically, GM affected miRNA maturation by targeting TAR RNA-binding protein 2 (TRBP), with an efficacy higher than that of enoxacin, and promoted the binding of TRBP with Dicer. Structural simplification and a preliminary structure-activity relationship study via the synthesis of 20 GM derivatives showed that compound 9 exhibited more potent inhibitory activity in HCC cell proliferation and affinity for TRBP than did GM. These results suggest that TRBP may be a novel potential therapeutic target in HCC and compound 9 may be a potential drug candidate for the treatment of HCC.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Carcinoma, Hepatocellular / drug therapy
  • Carcinoma, Hepatocellular / genetics
  • Carcinoma, Hepatocellular / pathology
  • Cell Cycle Checkpoints / drug effects
  • Cell Line, Tumor
  • Cell Movement / drug effects
  • Cell Proliferation / drug effects
  • DEAD-box RNA Helicases / chemistry
  • DEAD-box RNA Helicases / metabolism
  • Enoxacin / chemistry
  • Enoxacin / metabolism
  • Enoxacin / pharmacology
  • Enoxacin / therapeutic use
  • Gene Expression Regulation, Neoplastic / drug effects
  • Humans
  • Liver Neoplasms / drug therapy
  • Liver Neoplasms / genetics
  • Liver Neoplasms / pathology
  • Mice
  • Mice, Nude
  • MicroRNAs / metabolism
  • Polycyclic Compounds / chemistry*
  • Polycyclic Compounds / metabolism
  • Polycyclic Compounds / pharmacology
  • Polycyclic Compounds / therapeutic use
  • Proteome / drug effects
  • Proteome / metabolism
  • RNA-Binding Proteins / antagonists & inhibitors
  • RNA-Binding Proteins / metabolism*
  • Ribonuclease III / chemistry
  • Ribonuclease III / metabolism
  • Structure-Activity Relationship
  • Transcriptome / drug effects
  • Transplantation, Heterologous

Substances

  • MicroRNAs
  • Polycyclic Compounds
  • Proteome
  • RNA-Binding Proteins
  • trans-activation responsive RNA-binding protein
  • Enoxacin
  • DICER1 protein, human
  • Ribonuclease III
  • DEAD-box RNA Helicases