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Modeling Paracrine Noncanonical Wnt Signaling In Vitro
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Published on: December 10, 2021

WNT signaling determines tumorigenicity and function of ESC-derived retinal progenitors

Lu Cui1, Yuan Guan, Zepeng Qu

  • 1Key Laboratory of Stem Cell Biology, Institute of Health Sciences, Shanghai Jiao Tong University School of Medicine, Shanghai, People's Republic of China.

The Journal of Clinical Investigation
|March 26, 2013
PubMed

Insights

Embryonic stem cell-derived retinal progenitor cells (ESC-RPCs) can form tumors. Inhibiting WNT signaling, a key pathway, reduces tumor formation and improves cell therapy outcomes in retinal degeneration models.

Area of Science:

  • Stem cell biology
  • Regenerative medicine
  • Ophthalmology

Background:

  • Tumor formation is a significant barrier to using embryonic stem cell-derived (ESC-derived) cells in clinical settings.
  • ESC-derived retinal progenitor cells (ESC-RPCs) hold promise for treating retinal degeneration but face tumorigenicity challenges.

Purpose of the Study:

  • To identify key extracellular signaling and intrinsic factors governing the tumorigenicity and therapeutic function of transplanted ESC-RPCs.
  • To investigate the role of WNT signaling in ESC-RPC behavior.

Main Methods:

  • Evaluation of various ESC-RPCs in a mouse model of retinal degeneration.
  • Genome-wide gene expression profiling to identify critical factors.
  • Manipulation of WNT signaling pathway components (inhibition, dominant-negative Tcf7, gene silencing).

Main Results:

  • Canonical WNT signaling was identified as a critical determinant of ESC-RPC tumorigenicity and therapeutic function.
  • TCF7 mediates WNT signaling, directly inducing Sox2 and Nestin expression.
  • Inhibition of WNT signaling or TCF7, Sox2, or Nestin significantly reduced tumor formation.
  • Reduced tumorigenicity correlated with improved retinal integration and visual function preservation.

Conclusions:

  • The WNT signaling pathway is a critical regulator of both tumorigenicity and therapeutic functionality in ESC-derived progenitors.
  • Targeting the WNT/TCF7/Sox2/Nestin axis offers a strategy to enhance the safety and efficacy of ESC-RPC-based therapies.

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