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Updated: Jul 6, 2026
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Directed Differentiation of Hemogenic Endothelial Cells from Human Pluripotent Stem Cells
Published on: March 31, 2021
Akt-FOXO3a signaling affects human endothelial progenitor cell differentiation
Masaki Mogi1, Kenneth Walsh, Masaru Iwai
1Department of Molecular Cardiovascular Biology and Pharmacology, Ehime University Graduate School of Medicine, Toon, Japan.
Summary
Akt signaling regulates endothelial progenitor cell (EPC) maturation. This pathway influences EPC differentiation, with key proteins like FOXO3a playing a critical role in their development and function.
Area of Science:
- Cell Biology
- Molecular Biology
- Hematology
Background:
- Endothelial progenitor cells (EPCs) are crucial for vascular repair.
- The molecular mechanisms regulating EPC differentiation and maturation are not fully understood.
- Akt signaling is a key pathway involved in cell growth and survival.
Purpose of the Study:
- To investigate the role of Akt signaling in the differentiation and maturation of human EPCs.
- To elucidate the involvement of FOXO3a, an Akt downstream target, in EPC development.
Main Methods:
- Human peripheral blood mononuclear cells (PBMCs) were cultured and induced to differentiate into EPCs.
- Western blot analysis was used to assess protein expression levels (Akt, FOXO3a).
- Adenovirus-mediated gene transfer was employed to overexpress activated FOXO3a.
Main Results:
- Akt expression was initially attenuated and then upregulated during EPC differentiation.
- FOXO3a phosphorylation and downregulation occurred in late-stage EPC differentiation.
- Overexpression of activated FOXO3a increased early-stage EPC proliferation (foci formation) but impaired later maturation.
Conclusions:
- Akt/FOXO3a signaling is a critical regulator of EPC maturation.
- This pathway balances early EPC proliferation with later differentiation and functional development.
