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Anticancer Activity of Mukonal Against Human Laryngeal Cancer Cells Involves Apoptosis, Cell Cycle Arrest, and Inhibition of PI3K/AKT and MEK/ERK Signalling Pathways

Liu Li, Lu Huizhi, Wang Binu, Deng Xinxin, Wu Longjun, Yang Liping, Zhang Yingying

(Department of Ear, Nose and Throat (ENT), Tongren Hospital of WuHan University (Wuhan Third Hospital), Wuhan, Hubei, China (mainland))

Med Sci Monit 2018; 24:7295-7302

DOI: 10.12659/MSM.910702

BACKGROUND: Laryngeal cancer is one of the major malignancies of the neck and head and is responsible for considerable mortality across the globe. The treatments for laryngeal cancer mainly involve surgical interventions followed by chemotherapy. However, due to unsatisfactory results, constant relapses and the adverse effects associated with the currently used drugs, there is pressing need to develop effective drug options for treatment of laryngeal cancer. Therefore, this study was undertaken to investigate the anticancer effects of a plant-derived alkaloid, Mukonal, against human AMC-HN-8 laryngeal cancer cells.
MATERIAL AND METHODS: The WST-1 and clonogenic assays were employed to determine the cell viability. Apoptosis was detected by Hoechst and AO/EB staining. Cell migration and cell cycle analysis was performed by Transwell assay and flow cytometry, respectively. Protein expression was examined by Western blotting.
RESULTS: The results revealed that Mukonal reduced the viability of laryngeal cancer cells dose-dependently. The IC50 of Mukonal was found to be 10 µM. However, the effects of Mukonal on the normal HuLa-PC cells was found to be 140 µM. The decrease in the viability of the AMC-HN-8 laryngeal cancer cells was found to be due to the induction of apoptosis and G2/M cell cycle arrest. Mukonal also suppressed the cell migration and of the AMC-HN-8 laryngeal cancer cells. Mukonal could also inhibit the PI3K/AKT and MEK/ERK signalling pathways in a concentration-dependent manner.
CONCLUSIONS: Taken together, we conclude that Mukonal could prove a beneficial lead molecule for the treatment of laryngeal cancer.

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