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Angelicin is an active compound isolated from the Chinese herb Angelica archangelica , which has been reported to exert antitumor effects by inhibiting malignant behaviors in several types of tumor, including proliferation, colony formation, migration and invasion. However, the effects of angelicin on human cervical cancer cells is yet to be elucidated. The present study evaluated the antitumor effects of angelicin on cervical cancer cells. The results demonstrated that cervical cancer cells were more sensitive to angelicin than cervical epithelial cells. At its IC 30 , angelicin inhibited the proliferation of HeLa and SiHa cells by blocking the cell cycle at the G1/G0 phase and inhibiting other malignant behaviors, including colony formation, tumor formation in soft agar, migration and invasion. At the IC 50 , angelicin induced cell death potentially by promoting apoptosis. By identifying the hallmarks of autophagy, it was observed that angelicin treatment caused the accumulation of microtubule associated protein 1 light chain 3-β (LC3B) in the cytoplasm of HeLa and SiHa cells. Western blotting results demonstrated that cleaved LC3B-II and autophagy related proteins (Atg)3, Atg7 and Atg12-5 were upregulated following angelicin treatment. It was also determined that the phosphorylation of mTOR was induced by angelicin treatment. Furthermore, the inhibition of angelicin-induced mTOR phosphorylation did not disrupt its inhibitory effect on autophagy, indicating that angelicin inhibited autophagy in an mTOR-independent manner. Taken together, the present results suggested that angelicin regulated malignant behaviors in cervical cancer cells by inhibiting autophagy in an mTOR-independent manner. Findings suggested that autophagy might be a potential therapeutic target for cervical cancer.

Angelicin inhibits the malignant behaviours of human cervical cancer potentially via inhibiting autophagy