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Cordycepin inhibits cell growth and induces apoptosis in human cholangiocarcinoma.

The purpose of this study was to explore the role of cordycepin in human cholangiocarcinoma (CCA) cell growth and apoptosis. In the present study, colony formation assay, cell-counting kit-8 (CCK-8) assay and tumor xenograft experiment were performed to evaluate the effect of cordycepin on human CCA cell growth in vitro and in vivo; flow cytometric analysis was performed to evaluate the effect of cordycepin on cell apoptosis; quantitative real-time reverse transcription PCR (qRT-PCR) and western blot assays were performed to evaluate the expression levels of Caspase-3, Bcl-2 and Bax. The results showed that cordycepin inhibited cell growth in QBC939 and RBE cells in vitro and it could also inhibit QBC939 cells growth in vivo. Furthermore, the flow cytometric analysis, qRT-PCR and western blot assays showed that cordycepin could trigger QBC939 and RBE cells apoptosis by regulating the expression levels of Caspase-3, Bcl-2 and Bax. And we proposed that cordycepin could inhibit human CCA cell growth in vitro and in vivo, while, this function is related to the induction of cell apoptosis.