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Human gingival fibroblasts induced and differentiated into vascular endothelial-like cells.
Development, Growth & Differentiation 2016 December
A novel method for repair of vascular disease, mechanical damage, and tissue rebuilding is urgently required. Vascular endothelial cells (VECs) play an essential role in vascular rebuilding and vasotransplantation. In the present study, human gingival fibroblasts (HGFs) were cultured and induced into endothelial-like cells in vitro in order to confirm that HGFs with stem cell properties possessed the potential for differentiation into endothelial-like cells. The epithelium was extracted from normal human gingiva consisting of epithelium and connective tissue, which was isolated from patients. The identification of HGFs and induced endothelial-like cells were confirmed by flow cytometry, reverse transcription polymerase chain reaction (RT-PCR), immunocytochemical stain (ICS), and immunofluorescence stain (ISA). The morphology of human gingival fibroblasts with 8 ng/mL VEGF165 induced for different periods of days were observed by inverted microscope. Before induction, flow cytometry analysis showed that HGFs were positive for vimentin, but negative for CD31. RT-PCR, ICS, and ISA showed vimentin, S100A4, α-SMA, collagen III, and S100A4 were specifically expressed in these fibroblast cells. After induction, ICS showed induced vascular endothelial-like cells were positive for CD34 and CD31; ISA showed cells induced were positive for vWF and E-cadherin; RT-PCR results demonstrated that tie2 was specifically expressed in the cells induced. Flow cytometry analysis of the transformation efficiency from HGFs to endothelial-like cells. In conclusion, we found that HGFs possessed capacity for being induced and differentiated into vessel endothelial-like cells with typical and specific morphological, ultrastructural, and immunological characters of endothelial-like cells by induction with VEGF.
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