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Article

Two natural eudesmane-type sesquiterpenes from Laggera alata inhibit angiogenesis and suppress breast cancer cell migration through VEGF- and Angiopoietin 2-mediated signaling pathways

  • Authors:
    • Ning Liang
    • Yaolan Li
    • Hau Yin Chung
  • View Affiliations / Copyright

    Affiliations: Food and Nutritional Sciences Programme, School of Life Sciences, The Chinese University of Hong Kong, Sha Tin, New Territories, Hong Kong, SAR, P.R. China, Institute of Traditional Chinese Medicine and Natural Products, Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, Jinan University, Guangzhou, Guangdong, P.R. China
  • Pages: 213-222
    |
    Published online on: May 17, 2017
       https://doi.org/10.3892/ijo.2017.4004
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Abstract

Eudesmane-type sesquiterpenes are natural sesquiterpenes with anti-inflammatory properties, but their anti-angiogenic activities are not known. The present study demonstrated that 5α-hydroxycostic acid and hydroxyisocostic acid, two eudesmane-type sesquiterpenes (ETSs), isolated from the herb Laggera alata, possessed anti-angiogenic effects. Under non-toxic dosage, ETSs suppressed VEGF‑induced proliferation in human umbilical vein endothelial cells (HUVECs) and vessel formation in zebrafish embryos. Moreover, ETSs inhibited VEGF-stimulated HUVEC migration, stress fibers and tube formation. Results from real‑time PCR analysis involving in vivo and in vitro experiments indicated that pro-angiogenic-related mRNA levels were downregulated, including VEGFA, VEGFR2 and Tie2 genes after ETS treatments. Western blot analysis showed that ETSs suppressed VEGF-stimulated VEGFR2 phosphorylation and activation of its downstream molecules, such as Src/AKT/eNOS, FAK, PLCγ/ERK1/2 and p38. Moreover, the VEGF-stimulation of angiopoietin 2 (Ang2) mRNA level increase was significantly downregulated in the presence of ETSs. ETSs inhibited Ang2-induced phosphorylation of the receptor Tie2 in HUVECs, which indicated that ETSs not just suppressed VEGF/VEGFR2 axis, but also the Ang2/Tie2 one. Furthermore, the wound-healing assay revealed that ETSs reduced the migration of Ang2-stimulated human breast cancer (MCF-7) cells. Mechanistically, the anti-migration effect of ETSs correlated with the blockade of Ang2-induced E-cadherin loss and AKT activation. Collectively, the present study suggests that ETSs possess anti-angiogenic ability by interfering the VEGF- and Ang2-related pathways, and they may be good drug candidates.
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Copy and paste a formatted citation
Spandidos Publications style
Liang N, Li Y and Chung HY: Two natural eudesmane-type sesquiterpenes from Laggera alata inhibit angiogenesis and suppress breast cancer cell migration through VEGF- and Angiopoietin 2-mediated signaling pathways. Int J Oncol 51: 213-222, 2017.
APA
Liang, N., Li, Y., & Chung, H.Y. (2017). Two natural eudesmane-type sesquiterpenes from Laggera alata inhibit angiogenesis and suppress breast cancer cell migration through VEGF- and Angiopoietin 2-mediated signaling pathways. International Journal of Oncology, 51, 213-222. https://doi.org/10.3892/ijo.2017.4004
MLA
Liang, N., Li, Y., Chung, H. Y."Two natural eudesmane-type sesquiterpenes from Laggera alata inhibit angiogenesis and suppress breast cancer cell migration through VEGF- and Angiopoietin 2-mediated signaling pathways". International Journal of Oncology 51.1 (2017): 213-222.
Chicago
Liang, N., Li, Y., Chung, H. Y."Two natural eudesmane-type sesquiterpenes from Laggera alata inhibit angiogenesis and suppress breast cancer cell migration through VEGF- and Angiopoietin 2-mediated signaling pathways". International Journal of Oncology 51, no. 1 (2017): 213-222. https://doi.org/10.3892/ijo.2017.4004
Copy and paste a formatted citation
x
Spandidos Publications style
Liang N, Li Y and Chung HY: Two natural eudesmane-type sesquiterpenes from Laggera alata inhibit angiogenesis and suppress breast cancer cell migration through VEGF- and Angiopoietin 2-mediated signaling pathways. Int J Oncol 51: 213-222, 2017.
APA
Liang, N., Li, Y., & Chung, H.Y. (2017). Two natural eudesmane-type sesquiterpenes from Laggera alata inhibit angiogenesis and suppress breast cancer cell migration through VEGF- and Angiopoietin 2-mediated signaling pathways. International Journal of Oncology, 51, 213-222. https://doi.org/10.3892/ijo.2017.4004
MLA
Liang, N., Li, Y., Chung, H. Y."Two natural eudesmane-type sesquiterpenes from Laggera alata inhibit angiogenesis and suppress breast cancer cell migration through VEGF- and Angiopoietin 2-mediated signaling pathways". International Journal of Oncology 51.1 (2017): 213-222.
Chicago
Liang, N., Li, Y., Chung, H. Y."Two natural eudesmane-type sesquiterpenes from Laggera alata inhibit angiogenesis and suppress breast cancer cell migration through VEGF- and Angiopoietin 2-mediated signaling pathways". International Journal of Oncology 51, no. 1 (2017): 213-222. https://doi.org/10.3892/ijo.2017.4004
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