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Chemical suppression of an oncogenic splicing variant of AIMP2 induces tumour regression

Hee Sook Lee1, Dae Gyu Kim, Young Sun Oh

  • 1Medicinal Bioconvergence Research Center, Seoul National University, Seoul 305-343, Korea.

The Biochemical Journal
|July 3, 2013
PubMed

Insights

A novel compound, BC-DXI01, effectively targets and degrades AIMP2-DX2 mRNA in lung cancer cells. This targeted approach reduces tumor size and volume, offering a potential therapeutic strategy for AIMP2-DX2-driven cancers.

Area of Science:

  • Molecular Biology
  • Cancer Research
  • Drug Discovery

Background:

  • AIMP2 (aminoacyl-tRNA synthetase-interacting multifunctional protein 2) is a tumor suppressor.
  • AIMP2-DX2, a variant, promotes lung cancer by inhibiting AIMP2's function.
  • Targeting AIMP2-DX2 presents a therapeutic opportunity.

Purpose of the Study:

  • To investigate the efficacy of the synthetic compound BC-DXI01.
  • To determine if BC-DXI01 can selectively reduce AIMP2-DX2 levels.
  • To evaluate BC-DXI01's anti-tumor effects in vitro and in vivo.

Main Methods:

  • Utilized lung cancer cell lines with varying AIMP2-DX2 expression.
  • Administered BC-DXI01 to cell cultures and a mouse xenograft model.
  • Assessed AIMP2-DX2 mRNA and protein levels, cell death, and tumor growth.

Main Results:

  • BC-DXI01 selectively degraded AIMP2-DX2 mRNA, reducing protein levels.
  • BC-DXI01-induced cell death correlated with AIMP2-DX2 expression.
  • Tumor xenografts treated with BC-DXI01 showed up to 60% reduction in size and volume.

Conclusions:

  • BC-DXI01 effectively suppresses tumorigenesis by targeting AIMP2-DX2.
  • Selective degradation of AIMP2-DX2 mRNA by BC-DXI01 is a viable anti-cancer strategy.
  • BC-DXI01 demonstrates potential as a therapeutic agent for lung cancer.

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