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Selective elimination of human pluripotent stem cells by an oleate synthesis inhibitor discovered in a

Uri Ben-David1, Qing-Fen Gan, Tamar Golan-Lev

  • 1Stem Cell Unit, The Hebrew University, Jerusalem 91904, Israel.

Cell Stem Cell
|January 16, 2013
PubMed

Insights

Researchers identified novel small molecules that selectively eliminate undifferentiated human pluripotent stem cells (hPSCs), reducing tumor formation risk in cell therapies. This discovery targets lipid metabolism, enhancing hPSC safety for clinical applications.

Area of Science:

  • Stem cell biology
  • Drug discovery
  • Cell therapy

Background:

  • Human pluripotent stem cells (hPSCs) hold therapeutic promise but pose a tumorigenic risk due to residual undifferentiated cells.
  • Ensuring the safety of hPSC-based therapies necessitates methods to eliminate undifferentiated cells without harming differentiated ones.

Purpose of the Study:

  • To identify small molecules that selectively eliminate undifferentiated hPSCs.
  • To investigate the mechanism of action and therapeutic potential of these selective inhibitors.

Main Methods:

  • High-throughput screening of over 52,000 small molecules.
  • Cellular and molecular analyses to determine compound selectivity and mechanism.
  • In vivo teratoma formation assays.

Main Results:

  • Identified 15 pluripotent cell-specific inhibitors (PluriSIns), with nine sharing a common structure.
  • The lead compound, PluriSIn #1, selectively eliminated hPSCs by inducing ER stress, inhibiting protein synthesis, and triggering apoptosis.
  • PluriSIn #1 inhibits stearoyl-CoA desaturase (SCD1), revealing a role for lipid metabolism in hPSC survival.
  • PluriSIn #1 prevented teratoma formation in vivo.

Conclusions:

  • PluriSIns, particularly PluriSIn #1, offer a promising strategy for eliminating residual undifferentiated hPSCs.
  • Targeting lipid metabolism via SCD1 inhibition enhances the safety profile of hPSC-based cell therapies.
  • These findings pave the way for safer clinical applications of hPSC technology.

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