Antitumor effects of saikosaponin b2 on breast cancer cell proliferation and migration

Ma,Qing; Gao,Fang‑Fang; He,Xin; Li,Kai; Gao,Yang; Xu,Xiao‑Long; Jiang,Nan‑Hui; Ding,Liang; Song,Wen‑Jing; He,Yan‑Qi; Pan,Wen‑Ting; Wei,Lei; Zhang,Jing‑Wei

doi:10.3892/mmr.2019.10385

Antitumor effects of saikosaponin b2 on breast cancer cell proliferation and migration

Authors:
- Qing Ma
- Fang‑Fang Gao
- Xin He
- Kai Li
- Yang Gao
- Xiao‑Long Xu
- Nan‑Hui Jiang
- Liang Ding
- Wen‑Jing Song
- Yan‑Qi He
- Wen‑Ting Pan
- Lei Wei
- Jing‑Wei Zhang
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Affiliations: Department of Breast and Thyroid Surgery, Zhongnan Hospital, Hubei Key Laboratory of Tumour Biological Behaviours, Hubei Cancer Clinical Study Centre, Wuhan University, Wuhan, Hubei 430071, P.R. China, Department of Pathology and Pathophysiology, Hubei Provincial Key Laboratory of Developmentally Originated Disease, School of Basic Medical Sciences, Wuhan University, Wuhan, Hubei 430071, P.R. China
Published online on: June 13, 2019 https://doi.org/10.3892/mmr.2019.10385
Pages: 1943-1951

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Abstract

Saikosaponin b2 (SSb2) can be extracted from Bupleurum spp. roots (Radix Bupleuri), which belongs to the Umbelliferae family. The current study aimed to explore the effects of SSb2 on proliferation of breast cancer cells and to identify the mechanism by which SSb2 affects breast cancer cell migration. mRNA expression levels of STAT3 and vasodilator‑stimulated phosphoprotein (VASP) were determined and increased expression was observed in 16 breast cancer tissues compared with the paracancerous tissues. MTT, wound healing, colony formation assays and western blot suggested that SSb2 inhibited MCF‑7 proliferation and migration. It was further identified by western blot analysis that SSb2 treatment reduced levels of phosphorylated STAT3, VASP, matrix metallopeptidase (MMP) 2 and MMP9 in MCF‑7 compared with the untreated cells. In addition, it was demonstrated that inhibition of STAT3 phosphorylation decreased VASP expression levels and induction of STAT3 phosphorylation increased VASP levels. Furthermore, it was observed that the treatment of Kunming mice with SSb2 at 30 mg/kg/day for 30 days induced no obvious changes in the liver or kidney tissues, as determined by haematoxylin and eosin staining. In conclusion, these results indicated that SSb2 may be a potential antitumor drug for the treatment of breast cancer, which acts by suppressing proliferation and migration by downregulating the STAT3 signalling pathway and inhibiting the expression of VASP, MMP2 and MMP9 expression.

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