Notch signaling inhibits cardiac fibroblast to myofibroblast transformation by antagonizing TGF‐β1/Smad3 signaling

Oct 15, 2018Journal of cellular physiology

Notch signaling may block heart scar cells from changing by opposing TGF-β1/Smad3 signals

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Abstract

TGF-β1 increased collagen I secretion and myofibroblast marker expression in cardiac fibroblasts.

  • TGF-β1 decreased fibroblast marker expression while increasing myofibroblast markers in rat cardiac fibroblasts.
  • TGF-β1 enhanced proliferation, invasion, and adhesion of cardiac fibroblasts.
  • N1ICD overexpression inhibited the effects of TGF-β1 on cardiac fibroblast behavior.
  • N1ICD knockdown led to increased phosphorylation of Smad3 in cardiac fibroblasts.
  • N1ICD and Smad3 were shown to interact and colocalize in the nuclei of cardiac fibroblasts.
  • Notch signaling is associated with the inhibition of myocardial fibrosis, while TGF-β1/Smad3 signaling promotes it.

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