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Mar. Drugs 2018, 16(10), 361; https://doi.org/10.3390/md16100361

Aurantoside C Targets and Induces Apoptosis in Triple Negative Breast Cancer Cells

1
School of Molecular Sciences, The University of Western Australia, Crawley, WA 6009, Australia
2
Cancer Epigenetics, Harry Perkins Institute of Medical Research, QEII Medical Centre and Centre for Medical Research, The University of Western Australia, Crawley, WA 6009, Australia
3
Western Australian Museum, Welshpool, WA 6106, Australia
*
Authors to whom correspondence should be addressed.
Received: 11 September 2018 / Revised: 24 September 2018 / Accepted: 29 September 2018 / Published: 1 October 2018
(This article belongs to the Special Issue Bioactive Compounds from Marine Sponges)
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Abstract

Triple negative breast cancer (TNBC) is a subtype of breast cancers that currently lacks effective targeted therapy. In this study, we found that aurantoside C (C828), isolated from the marine sponge Manihinea lynbeazleyae collected from Western Australia, exhibited higher cytotoxic activities in TNBC cells compared with non-TNBC (luminal and normal-like) cells. The cytotoxic effect of C828 was associated to the accumulation of cell at S-phase, resulting in the decline of cyclin D1, cyclin E1, CDK4, and CDK6, and an increase in p21. We also found that C828 inhibited the phosphorylation of Akt/mTOR and NF-kB pathways and increased the phosphorylation of p38 MAPK and SAPK/JNK pathways, leading to apoptosis in TNBC cells. These effects of C828 were not observed in non-TNBC cells at the concentrations that were cytotoxic to TNBC cells. When compared to the cytotoxic effect with the chemotherapeutic drugs doxorubicin and cisplatin, C828 was found to be 20 times and 35 times more potent than doxorubicin and cisplatin, respectively. These results indicate that C828 could be a promising lead for developing new anticancer agents that target TNBC cells. View Full-Text
Keywords: triple negative breast cancer; aurantoside C; marine sponge; apoptosis; cell cycle analysis triple negative breast cancer; aurantoside C; marine sponge; apoptosis; cell cycle analysis
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Shrestha, S.; Sorolla, A.; Fromont, J.; Blancafort, P.; Flematti, G.R. Aurantoside C Targets and Induces Apoptosis in Triple Negative Breast Cancer Cells. Mar. Drugs 2018, 16, 361.

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