Osthole attenuates angiogenesis in an orthotopic mouse model of hepatocellular carcinoma via the downregulation of nuclear factor‑κB and vascular endothelial growth factor

Yao,Fei; Zhang,Lurong; Jiang,Guorong; Liu,Min; Liang,Guoqiang; Yuan,Qin

doi:10.3892/ol.2018.9213

Osthole attenuates angiogenesis in an orthotopic mouse model of hepatocellular carcinoma via the downregulation of nuclear factor‑κB and vascular endothelial growth factor

Authors:
- Fei Yao
- Lurong Zhang
- Guorong Jiang
- Min Liu
- Guoqiang Liang
- Qin Yuan
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Affiliations: Laboratory of Clinical Pharmacy of Chinese Herb, Suzhou Hospital of Traditional Chinese Medicine, Suzhou, Jiangsu 215000, P.R. China
Published online on: July 25, 2018 https://doi.org/10.3892/ol.2018.9213
Pages: 4471-4479
Copyright: © Yao et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

Osthole has been demonstrated to have antitumor activity. Previous studies by our group indicated that osthole effectively inhibited tumor growth in hepatocellular carcinoma (HCC) through the induction of apoptosis and enhancement of antitumor immune responses in mice. The importance of angiogenesis in the proliferation, invasion and metastasis of tumor cells in HCC is well established. The present study aimed to investigate the effects of osthole on angiogenesis in an orthotopic mouse model of HCC. Orthotopic HCC in mice was established, and osthole at 61, 122 and 244 mg/kg was administered intraperitoneally once daily to the tumor‑bearing mice for 14 consecutive days. Immunohistochemistry was performed to analyze the microvessel density (MVD) of tissues, and the level of vascular endothelial growth factor (VEGF) was measured by ELISA. The protein levels of nuclear factor‑κB (NF‑κB) p65 and IκB‑α were also detected by western blotting. MVD was positively correlated with tumor weight in the orthotopic mouse model of HCC. Osthole administration significantly decreased MVD in tumor and adjacent tissues, and inhibited tumor growth. Furthermore, osthole downregulated the expression of VEGF and NF‑κB p65, and upregulated IκB‑α expression in tumor and adjacent tissues. To the best of our knowledge, the results of the present study demonstrated for the first time that osthole inhibits angiogenesis in an orthotopic mouse model of HCC, which may be one of the mechanisms underlying the anti‑HCC activity of osthole, which in turn may be mediated by the NF‑κB/VEGF signaling pathway. Therefore, osthole, a potential angiogenesis inhibitor and immune system enhancer, may be a promising lead compound for the treatment of HCC.

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