Curcumin inhibits epithelial‑mesenchymal transition in oral cancer cells via c‑Met blockade

Ohnishi,Yuichi; Sakamoto,Tsukasa; Zhengguang,Li; Yasui,Hiroki; Hamada,Hiroyuki; Kubo,Hirohito; Nakajima,Masahiro

doi:10.3892/ol.2020.11523

Curcumin inhibits epithelial‑mesenchymal transition in oral cancer cells via c‑Met blockade

Authors:
- Yuichi Ohnishi
- Tsukasa Sakamoto
- Li Zhengguang
- Hiroki Yasui
- Hiroyuki Hamada
- Hirohito Kubo
- Masahiro Nakajima
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Affiliations: Second Department of Oral and Maxillofacial Surgery, Osaka Dental University, Hirakata, Osaka 573‑1121, Japan, Department of Dentistry and Oral Surgery, Kansai Medical University Hospital, Hirakata, Osaka 573‑1010, Japan
Published online on: April 7, 2020 https://doi.org/10.3892/ol.2020.11523
Pages: 4177-4182

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Abstract

Oral squamous cell carcinoma (OSCC) is the most common type of oral cancer. OSCC cells are highly invasive, a characteristic that involves epithelial‑mesenchymal transition (EMT); the conversion of immotile epithelial cells into motile mesenchymal cells. EMT is involved in the progression of various types of cancer by promoting tumour cell scattering and conferring to these cells cancer stem cell (CSC)‑like characteristics, such as self‑renewal. Hepatocyte growth factor (HGF) signalling plays an important role in EMT induction and, therefore, contributes to cell invasion and metastasis in cancer. Due to its potential chemopreventative and anti‑tumour activities, curcumin has attracted much interest and has been shown to act as a potent EMT inhibitor in various types of cancer. However, at present, the potential effects of curcumin on HGF‑induced EMT in OSCC have not been investigated. Here, we demonstrated that HGF signalling could induce EMT in the HSC4 and Ca9‑22 OSCC cell lines via the HGF receptor c‑Met and downstream activation of the pro‑survival ERK pathway. Notably, curcumin inhibited HGF‑induced EMT and cell motility in HSC‑4 and Ca9‑22 cells via c‑Met blockade. Therefore, these findings establish curcumin as a candidate drug for OSCC treatment. Furthermore, curcumin was able to effectively inhibit the HGF‑induced increase in the levels of vimentin by downregulating the expression of phosphorylated c‑Met, an ERK. In conclusion, the results of the present study demonstrated that curcumin was able to reverse HGF‑induced EMT, possibly by inhibiting c‑Met expression in oral cancer cells, providing a strong basis for the development of novel approaches for the treatment of oral cancer.

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