Angiogenic effects of apigenin on endothelial cells after hypoxia-reoxygenation via the caveolin-1 pathway

Tu,Fengxia; Pang,Qiongyi; Chen,Xiang; Huang,Tingting; Liu,Meixia; Zhai,Qiongxiang

doi:10.3892/ijmm.2017.3159

Angiogenic effects of apigenin on endothelial cells after hypoxia-reoxygenation via the caveolin-1 pathway

Authors:
- Fengxia Tu
- Qiongyi Pang
- Xiang Chen
- Tingting Huang
- Meixia Liu
- Qiongxiang Zhai
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Affiliations: Southern Medical University, Guangzhou, Guangdong 510515, P.R. China, Department of Pediatrics, Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325000, P.R. China
Published online on: September 28, 2017 https://doi.org/10.3892/ijmm.2017.3159
Pages: 1639-1648
Copyright: © Tu et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

In the present study, we aimed to elucidate whether apigenin contributes to the induction of angiogenesis and the related mechanisms in cell hypoxia-reoxygenation injury. The role of apigenin was examined in human umbilical vein endothelial cell (HUVEC) viability, migration and tube formation in vitro. To investigate the related mechanisms, we used caveolin-1 short interfering RNA. The viability of HUVECs was measured using Cell Counting Kit-8 assays, HUVEC migration was analyzed by crystal violet staining, and a tube formation assay was performed using the branch point method. Expression of caveolin-1, vascular endothelial growth factor (VEGF), and endothelial nitric oxide synthase (eNOS) in HUVECs was examined by polymerase chain reaction and western blotting. Our data revealed that apigenin induced angiogenesis in vitro by increasing the tube formation ability of HUVECs, which was counteracted by caveolin-1 silencing. Compared to the NC group, Caveolin-1 and eNOS expression was upregulated by apigenin, whereas compared to the NC group, eNOS expression was increased upon caveolin-1 silencing. The expression of VEGF was increased by treatment with apigenin; however, compared to the NC group, caveolin-1 silencing did not affect VEGF expression, and apigenin did not increase VEGF expression in HUVECs after caveolin-1 silencing. These data suggest that apigenin may be a candidate therapeutic target for stroke recovery by promoting angiogenesis via the caveolin-1 signaling pathway.

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