Abstract
The present study aimed to detect the impact of the ethanol extract of the Livistona chinensis seed (EELC) on angiogenesis in human umbilical vein endothelial cells (HUVECs). A chorioallantoic membrane (CAM) assay was used to detect the anti-angiogenic activity of EELC in vivo. In vitro, the effect of EELC on the proliferation, migration and angiogenesis of HUVECs was determined by an MTT assay, a wound healing assay and a tube formation assay, respectively. The vascular endothelial growth factor (VEGF)-A and VEGF receptor (VEGFR)-2 protein and mRNA level were measured with ELISA and reverse transcription-semi-quantitative polymerase chain reaction. It was observed that EELC significantly decreased the formation of new vessels in the CAM assay. EELC inhibited the proliferation and migration of HUVECs. The extent of tube formation by HUVECs was also reduced by EELC. In addition, EELC treatment reduced the level of VEGF-A and VEGFR-2 mRNA and protein. The results suggest that EELC inhibits tumor angiogenesis through inhibiting the proliferation and migration of HUVECs, and by downregulating VEGF and VEGFR.
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