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Phosphatidic Acid Improves Reprogramming to Pluripotency by Reducing Apoptosis.

Yuan Jiang1,2, Mingxia Du1,3, Menghua Wu1,2

  • 11 The State Key Laboratory of Reproductive Biology, Institute of Zoology , Chinese Academy of Sciences, Beijing, China .

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Phosphatidic acid (PA) significantly enhances induced pluripotent stem cell (iPSC) generation by reducing apoptosis and promoting cell proliferation. Supplementing with PA improves reprogramming efficiency, yielding high-quality iPSCs for regenerative medicine applications.

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Area of Science:

  • Stem Cell Biology
  • Molecular Biology
  • Biochemistry

Background:

  • Induced pluripotent stem cell (iPSC) generation demands substantial lipids for cell division.
  • The specific role of phosphatidic acid (PA), a lipid precursor, in iPSC reprogramming remains largely uncharacterized.

Purpose of the Study:

  • To investigate the effect of phosphatidic acid (PA) on the efficiency of induced pluripotent stem cell (iPSC) generation.
  • To elucidate the underlying mechanisms by which PA influences reprogramming and cell survival.

Main Methods:

  • Reprogramming of mouse embryonic fibroblasts using lentiviral Yamanaka factors.
  • Inhibition and supplementation of cellular phosphatidic acid (PA) levels.
  • Assessment of iPSC colony formation, pluripotency marker expression, differentiation potential, and apoptosis.
  • Mitochondrial function analysis and gene expression profiling (microarray).

Main Results:

  • Supplementation with 400 μM PA increased iPSC generation efficiency by 4- to 5-fold.
  • PA treatment reduced apoptosis by increasing cardiolipin, inhibiting caspase-7, and upregulating Bcl-2.
  • PA-generated iPSCs expressed pluripotency markers, differentiated into three germ layers, and formed chimeric mice.
  • Microarray analysis suggested PA functions via membrane-anchored proteins, correlating with observed membrane enrichment genes.

Conclusions:

  • Phosphatidic acid (PA) is a crucial factor that significantly enhances the efficiency of iPSC generation.
  • PA mitigates apoptosis and supports the necessary cellular transitions during reprogramming.
  • PA represents a novel and valuable supplement for generating high-quality iPSCs.