Antrodia salmonea induces G2 cell-cycle arrest in human triple-negative breast cancer (MDA-MB-231) cells and suppresses tumor growth in athymic nude mice

Publication date: 20 January 2017
Source:Journal of Ethnopharmacology, Volume 196
Author(s): Chia-Ting Chang, You-Cheng Hseu, Varadharajan Thiyagarajan, Hui-Chi Huang, Li-Sung Hsu, Pei-Jane Huang, Jer-Yuh Liu, Jiunn-Wang Liao, Hsin-Ling Yang
Ethnopharmacological relevanceAntrodia salmonea (AS), is a well-known folk medicinal mushroom in Taiwan, has been reported to exhibit anti-oxidant, anti-angiogenic, and anti-inflammatory effects.Materials and methodsIn the present study, we examined the effects of AS on cell-cycle arrest in vitro in MDA-MB-231 cells and on tumor regression in vivo using an athymic nude mice model.ResultsAS (0–200μg/mL) treatment significantly induced G2 cell-cycle arrest in MDA-MB-231 cells by reducing the levels of cyclin B1, cyclin A, cyclin E, and CDC2 proteins. In addition, N-acetylcysteine (NAC) pretreatment prevented AS induced G2 cell-cycle arrest, indicating that ROS accumulation and subsequent cell cycle arrest might be a major mechanism of AS-induced cytotoxicity. Further, AS treatment decreased COX-2 expression and induced PARP cleavage was significantly reversed by NAC pretreatment in MDA-MB-231 cells. The in vivo study results revealed that AS treatment was effective in terms of delaying the tumor incidence and reducing the tumor growth in MDA-MB-231-xenografted nude mice. TUNEL assay, immunohistochemical staining and Western blotting confirmed that AS significantly modulated the xenografted tumor progression as demonstrated by induction of apoptosis, autophagy, and cell-cycle arrest.ConclusionOur data strongly suggest that Antrodia salmonea could be an anti-cancer agent for human breast cancer.

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