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- W4206799743 abstract "Neurons and vascular cells compose neurovascular niches in the central nervous system where endothelial cells can promote neurogenesis via direct and indirect effects. Neurocytes and vascular cells are gravely destroyed upon spinal cord injury, which severely affects spinal motor functions. Neurogenesis originates from neural stem cells (NSCs) and endothelial cells derived from endothelial progenitor cells (EPCs) in the spinal cord. To demonstrate whether EPCs promote NSC proliferation, we cultured NSCs with EPC-conditioned medium from hypoxic conditions (CM) and EPC-unconditioned medium (UCM), i.e. endothelial cell basal medium-2, as a control. The number of S-phase cells in CM were 54.73 ± 0.67 whereas those in UCM were 26.30 ± 0.43, and the number of cells in CM was higher than that in UCM (0.32 ± 0.0019 vs. 0.55 ± 0.0029). We hypothesized that the cell proliferation was promoted by vascular endothelial growth factor A (VEGFA), which is secreted by EPCs in hypoxic conditions. We then used VEGF shRNA to decrease VEGFA secretion by EPCs. NSCs were cultured in conditioned medium from shRNA transfected EPCs under hypoxia (shRNA-CM) and EPC-conditioned medium under hypoxia (CM). The number of S-phase cells in the shRNA-CM was 36.86 ± 0.49 whereas that in CM was 53.61 ± 0.89, and the number of cells in the shRNA-CM was lower than that in CM (0.55 ± 0.0032 vs. 0.34 ± 0.0029). These data indicate that EPCs could promote NSC proliferation in hypoxic condition through VEGFA secretion." @default.
- W4206799743 created "2022-01-25" @default.
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- W4206799743 date "2022-01-18" @default.
- W4206799743 modified "2023-09-28" @default.
- W4206799743 title "Endothelial progenitor cells promote neural stem cell proliferation in hypoxic conditions through VEGF via the PI3K/AKT pathway" @default.
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- W4206799743 doi "https://doi.org/10.1080/10799893.2021.2019275" @default.
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