Effects of anticancer drug and angiogenesis inhibitor on invasion and metastasis of oral squamous cell carcinoma.

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Using an orthotopic implantation mice model in which the invasion and metastasis of oral cancer can be reproduced, we investigated the inhibitory effects of anticancer agent and angiogenesis inhibitor on invasion and metastasis. A highly invasive and metastatic human oral squamous cell carcinoma cell line, OSC-19, was implanted into the tongue or oral floor of nude mice, and cisplatin or tranilast were administered to the mice after the implantation. The effects of each drug on cancer invasion and metastasiswere investigated. Tumor size and the ratio of proliferating cell nuclear antigen positive cells were significantly reduced. In the control group, the tumors showed grade 4C of mode of invasion, while in the groups treated with anticancer agent and angiogenesis inhibitor, grade 3 was observed, with an inhibitory effect on tumor invasion being observed. The rate of metastasis in the cervical lymph node was significantly decreased in the groups treated with the anticancer agent and angiogenesis inhibitor. The tumor stage progression in the metastatic lymph nodes was also inhibited. The use of anticancer agent and angiogenesis inhibitor considering these effects may be clinically very useful.