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Updated: Jan 22, 2026

Strategic Endothelial Cell Tube Formation Assay: Comparing Extracellular Matrix and Growth Factor Reduced Extracellular Matrix
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Restoring extracellular matrix synthesis in senescent stem cells.

Na Rong1, Panagiotis Mistriotis1, Xiaoyan Wang1

  • 1Department of Chemical and Biological Engineering, University at Buffalo, Buffalo, New York, USA.

FASEB Journal : Official Publication of the Federation of American Societies for Experimental Biology
|July 10, 2019
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The embryonic transcription factor NANOG can restore collagen type III (COL3) production in aged cells. This finding suggests new anti-aging strategies targeting extracellular matrix repair in senescent tissues.

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Area of Science:

  • Biochemistry
  • Cell Biology
  • Regenerative Medicine

Background:

  • Collagen type III (COL3) is crucial for vascular health, and its reduced expression is linked to diseases like Ehlers-Danlos syndrome and aging.
  • Cellular senescence and premature aging syndromes like Hutchinson-Gilford progeria are associated with decreased COL3 levels in stem cells and myofibroblasts.

Purpose of the Study:

  • To investigate the role of Nanog homeobox (NANOG) in restoring COL3 expression in senescent cells.
  • To elucidate the molecular mechanisms by which NANOG influences COL3 production and the TGF-β pathway.

Main Methods:

  • Senescent human mesenchymal stem cells and myofibroblasts were analyzed for COL3 expression.
  • Ectopic expression of NANOG was performed in senescent cells.
  • RNA sequencing was used to assess gene expression changes.
  • Chromatin immunoprecipitation sequencing and immunoprecipitation experiments identified NANOG binding sites.
  • Functional studies involved chemical inhibition, shRNA knockdown, and gain-of-function approaches for SMAD2 and SMAD3.

Main Results:

  • NANOG expression significantly restored COL3 levels in senescent cells.
  • NANOG reactivated the TGF-β pathway, up-regulating pro-activation genes and down-regulating negative regulators.
  • NANOG directly bound to SMAD2 and SMAD3 promoters, increasing their expression and phosphorylation.
  • SMAD2 and SMAD3 were essential for NANOG-mediated COL3 restoration, with SMAD3 overexpression being sufficient.

Conclusions:

  • NANOG can reverse age-related decline in COL3 production by reactivating the TGF-β/SMAD signaling pathway.
  • This study highlights NANOG as a potential therapeutic target for improving extracellular matrix integrity in aged tissues.
  • The findings offer novel strategies for regenerative medicine and anti-aging treatments aimed at restoring tissue function.