Thai Water Lily Extract Induces B16 Melanoma Cell Apoptosis and Inhibits Cellular Invasion Through the Role of Cellular Oxidants

Document Type : Research Articles


1 Department of Pathobiology, Faculty of Science, Mahidol University, Bangkok, Thailand.

2 School of Medicine, Walailak University, Nakhon Si Thammarat, Thailand.

3 Division of Hematopoiesis, Center for AIDS Research, Kumamoto University, Kumamoto 860-0811, Japan.


Melanoma is a cancer that is associated with a high capacity of invasion. Oxidative stress is recognized as cancer growth and progression. The phytochemical pigments of natural products show either anti-oxidant or pro-oxidant activity from the redox system. In addition, the phytophenolics also prevent cancer cell proliferation and progression. Objective: This study aims to investigate the effects of Thai water lily on cell apoptosis and cellular invasion through the role of cellular oxidants in B16 melanoma cells. Methods: The cytotoxicity and cell apoptosis of Thai water lily extract treating B16 cells were performed by using the MTT and Annexin V/PI-flow cytometry methods, respectively. In addition, cellular oxidants and cancer cell invasion were also obtained by using DCFH-DA and Boyden chamber assays, respectively. Results: Thai water lily, Nymphaea stellate extract was shown to be markedly toxic to B16 melanoma cells with IC50 = 814 μg/ml. The extract at 800 and 1,000 μg/ml demonstrated pro-oxidant activity relating to the cell apoptosis. The low concentrations of the extract at 200 and 400 μg/ml showed the anti-oxidant function associated with the inhibitory effect of melanoma cell invasion. Conclusion: Thai water lily extract may play an important role in bioactive work as a chemo preventive agent on the modulation of cellular oxidative stress-induced apoptosis and suppressed cancer cell invasion.


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