Anti-angiogenic effects of Siegesbeckia glabrescens are mediated by suppression of the Akt and p70S6K-dependent signaling pathways | Zendy

Hyeonju Kim | Zendy; Hee-Young Ko | Zendy; Shin-Wook Choi | Zendy; Dong Wan Seo | Zendy

Open Access

Anti-angiogenic effects of Siegesbeckia glabrescens are mediated by suppression of the Akt and p70S6K-dependent signaling pathways

Author(s) -

Hyeonju Kim,

Hee-Young Ko,

Shin-Wook Choi,

Dong Wan Seo

Publication year - 2014

Publication title -

oncology reports

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.094

H-Index - 96

eISSN - 1791-2431

pISSN - 1021-335X

DOI - 10.3892/or.2014.3630

Subject(s) - angiogenesis , downregulation and upregulation , umbilical vein , protein kinase b , cell cycle , cell growth , cancer research , pi3k/akt/mtor pathway , human umbilical vein endothelial cell , endothelial stem cell , vascular endothelial growth factor , signal transduction , microbiology and biotechnology , cyclin d1 , cell , pharmacology , biology , chemistry , vegf receptors , biochemistry , in vitro , gene

Siegesbeckia glabrescens (SG) Makino (Compositae) has been used as a traditional medicine for the treatment of allergic and inflammatory diseases. In the present study, we report the effects and molecular mechanism of an ethanolic extract of SG on cell proliferation, migration and tube formation in vascular endothelial growth factor-A (VEGF-A)-treated human umbilical vein endothelial cells. SG treatment inhibited VEGF-A-stimulated endothelial cell proliferation through downregulation of cyclin D and upregulation of cyclin-dependent kinase inhibitors such as p27Kip1 and p21WAF1/Cip1. In addition, SG inhibited VEGF‑A-stimulated endothelial cell migration and tube formation. These anti-angiogenic activities of SG were mediated by inactivation of the Akt- and p70S6K-dependent signaling pathways. Collectively, our findings demonstrate the pharmacological roles and molecular mechanism of SG in regulating angiogenic responses and support further evaluation and development of SG as a potential therapeutic agent for the treatment and prevention of angiogenesis-related diseases including cancer.

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