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Updated: Jul 24, 2025

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Isolation of Human Lymphatic Endothelial Cells by Multi-parameter Fluorescence-activated Cell Sorting
Published on: May 1, 2015
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Rictor induces AKT signaling to regulate lymphatic valve formation
Biorxiv : the Preprint Server for Biology
|July 3, 2023
Summary
Mammalian target of rapamycin complex 2 (mTORC2) signaling, specifically its component RICTOR, is essential for lymphatic valve formation. RICTOR activation of AKT prevents FOXO1 nuclear accumulation, promoting valve development and maintenance.
Area of Science:
- Vascular Biology
- Cell Signaling
- Mechanotransduction
Background:
- Lymphatic valves are vital for preventing lymph backflow and maintaining lymphatic system function.
- Mutations in genes controlling lymphatic valve formation are linked to congenital lymphedema.
- Lymphatic valve development is regulated by oscillatory shear stress (OSS) via the PI3K/AKT pathway.
Conclusions:
- RICTOR signaling is crucial for lymphatic valve development and maintenance.
- RICTOR activates AKT, which in turn inhibits nuclear accumulation of the valve repressor FOXO1.
- This pathway represents a novel mechanism in mechanotransduction essential for lymphatic vasculature.
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