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Updated: Aug 21, 2026

Culturing and Manipulation of O9-1 Neural Crest Cells
Published on: October 9, 2018
Nox1 regulates apoptosis and potentially stimulates branching morphogenesis in sinusoidal endothelial cells
Satsuki Kobayashi1, Yoshihisa Nojima, Masabumi Shibuya
1Department of Genetics, Institute of Medical Science, University of Tokyo, Minato-ku, Tokyo 108-0071, Japan.
Abstract:
Tubulogenic transformation of a nontubulogenic endothelial cell line NP31 by a constitutively activated form of the Flt-1 kinase (NP31/kinase) was accompanied by an increased expression of Nox1 by sixfold over NP31. Overexpression of Nox1 in NP31 cells (NP31/Nox1) stimulated branching morphogenesis in Matrigel but surprisingly cords lacked a lumen. The branching morphogenesis by NP31/kinase and NP31/Nox1 cells was blocked either by N-acetyl-l-cysteine (NAC) or Tiron. Vascular endothelial growth factor (VEGF)-dependent sinusoidal endothelial cells (SEC) in primary culture showed fivefold increase in Nox1 expression 4 days after VEGF stimulation. Interestingly, VEGF-resistant apoptosis in SEC at day 7 was inhibited by NAC or by anti-Nox1 siRNA. These results suggest that Nox1 regulates apoptosis in SEC and can potentially stimulate branching morphogenesis in SEC-derived NP 31 cells.
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