Article Publish Status: FREE
Abstract Title:

Role of microRNA-520h in 20(R)-ginsenoside-Rg3-mediated angiosuppression.

Abstract Source:

J Ginseng Res. 2016 Apr ;40(2):151-9. Epub 2015 Jul 29. PMID: 27158236

Abstract Author(s):

Man-Hong Keung, Lai-Sheung Chan, Hoi-Hin Kwok, Ricky Ngok-Shun Wong, Patrick Ying-Kit Yue

Article Affiliation:

Man-Hong Keung


BACKGROUND: Ginsenoside-Rg3, the pharmacologically active component of red ginseng, has been found to inhibit tumor growth, invasion, metastasis, and angiogenesis in various cancer models. Previously, we found that 20(R)-ginsenoside-Rg3 (Rg3) could inhibit angiogenesis. Since microRNAs (miRNAs) have been shown to affect many biological processes, they might play an important role in ginsenoside-mediated angiomodulation.

METHODS: In this study, we examined the underlying mechanisms of Rg3-induced angiosuppression through modulating the miRNA expression. In the miRNA-expression profiling analysis, six miRNAs and three miRNAs were found to be up- or down-regulated in vascular-endothelial-growth-factor-induced human-umbilical-vein endothelial cells (HUVECs) after Rg3 treatment, respectively.

RESULTS: A computational prediction suggested that mature hsa-miR-520h (miR-520h) targets ephrin receptor (Eph) B2 and EphB4, and hence, affecting angiogenesis. The up-regulation of miR-520h after Rg3 treatment was validated by quantitative real-time polymerase chain reaction, while the protein expressions of EphB2 and EphB4 were found to decrease, respectively. The mimics and inhibitors of miR-520h were transfected into HUVECs and injected into zebra-fish embryos. The results showed that overexpression of miR-520h could significantly suppress the EphB2 and EphB4 protein expression, proliferation, and tubulogenesis of HUVECs, and the subintestinal-vessel formation of the zebra fish.

CONCLUSION: These results might provide further information on the mechanism of Rg3-induced angiosuppression and the involvement of miRNAs in angiogenesis.

Study Type : Animal Study, In Vitro Study

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Sayer Ji
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