The anti-cancer activity of Antrodia camphorata against human ovarian carcinoma (SKOV-3) cells via modulation of HER-2/neu signaling pathway.

Abstract:

ETHNOPHARMACOLOGICAL RELEVANCE:Antrodia camphorata (AC) is well known in Taiwan as a traditional Chinese medicinal fungus. However, the anticancer activity of AC against human HER-2/neu-overexpressing ovarian cancers is poorly understood. MATERIALS AND METHODS:The aim of this study is to investigate whether a submerged fermentation culture of AC can inhibit human ovarian carcinoma cell (SKOV-3) proliferation by suppressing the HER-2/neu signaling pathway. Cell viability, colony formation, DCFH-DA fluorescence microscopy, western blotting, HER-2/neu immunofluorescence imaging, flow cytometry, and TUNEL assays were carried out to determine the anti-cancer effects of AC. RESULTS:MTT and colony formation assays showed that AC induced a dose-dependent reduction in SKOV-3 cell growth. Immunoblot analysis demonstrated that HER-2/neu activity and tyrosine phosphorylation were significantly inhibited by AC. Furthermore, AC treatment significantly inhibited the activation of PI3K/Akt and their downstream effector β-catenin. We also observed that AC caused G2/M arrest mediated by down-regulation of cyclin D1, cyclin A, cyclin B1, and Cdk1 and increased p27 expression. Notably, AC induced apoptosis, which was associated with DNA fragmentation, cytochrome c release, caspase-9/-3 activation, PARP degradation, and Bcl-2/Bax dysregulation. An increase in intracellular reactive oxygen species (ROS) was observed in AC-treated cells, whereas the antioxidant N-acetylcysteine (NAC) prevented AC-induced cell death, HER-2/neu depletion, PI3K/Akt inactivation, and Bcl-2/Bax dysregulation, indicating that AC-induced cell death was mediated by ROS generation. CONCLUSIONS:These results suggest that AC may exert anti-tumor activity against human ovarian carcinoma by suppressing HER-2/neu signaling pathways.

journal_name

J Ethnopharmacol

authors

Yang HL,Lin KY,Juan YC,Kumar KJ,Way TD,Shen PC,Chen SC,Hseu YC

doi

10.1016/j.jep.2013.04.023

subject

Has Abstract

pub_date

2013-06-21 00:00:00

pages

254-65

issue

1

eissn

0378-8741

issn

1872-7573

pii

S0378-8741(13)00276-6

journal_volume

148

pub_type

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