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Published in: Cellular Oncology 3/2016

01-06-2016 | Original Paper

A novel curcumin-like dienone induces apoptosis in triple-negative breast cancer cells

Authors: Elisa Robles-Escajeda, Umashankar Das, Nora M. Ortega, Karla Parra, Giulio Francia, Jonathan R. Dimmock, Armando Varela-Ramirez, Renato J. Aguilera

Published in: Cellular Oncology | Issue 3/2016

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Abstract

Purpose

According to the World Health Organization (WHO), breast cancer is the most common cancer affecting women worldwide. In the USA ~12.3 % of all women are expected to be diagnosed with various types of breast cancer, exhibiting varying degrees of therapeutic response rates. Therefore, the identification of novel anti-breast cancer drugs is of paramount importance.

Methods

The 1,5-diaryl-3-oxo-1,4-pentadienyl pharmacophore was incorporated into a number of cytotoxins. Three of the resulting dienones, 2a, 2b and 2c, were tested for their anti-neoplastic potencies in a variety of human breast cancer-derived cell lines, including the triple negative MDA-MB-231 cell line and its metastatic variant, using a live-cell bio-imaging method. Special emphasis was put on dienone 2c, since its anti-cancer activity and its mode of inflicting cell death have so far not been reported.

Results

We found that all three dienones exhibited potent cytotoxicities towards the breast cancer-derived cell lines tested, whereas significantly lower toxicities were observed towards the non-cancerous human breast cell line MCF-10A. The dienones 2b and 2c exhibited the greatest selective cytotoxicity at submicromolar concentration levels. We found that these two dienones induced phosphatidylserine externalization in MDA-MB-231 cells in a concentration-dependent manner, suggesting that their cytotoxic effect might be mediated by apoptosis. This possibility was confirmed by our observation that the dienone 2c can induce mitochondrial depolarization, caspase-3 activation, cell cycle disruption and DNA fragmentation in MDA-MB-231 cells.

Conclusion

Our findings indicate that dienone 2c uses the mitochondrial/intrinsic pathway to inflict apoptosis in triple negative MDA-MB-231 breast cancer-derived cells. This observation warrants further assessment of dienone 2c as a potential anti-breast cancer drug.
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Metadata
Title
A novel curcumin-like dienone induces apoptosis in triple-negative breast cancer cells
Authors
Elisa Robles-Escajeda
Umashankar Das
Nora M. Ortega
Karla Parra
Giulio Francia
Jonathan R. Dimmock
Armando Varela-Ramirez
Renato J. Aguilera
Publication date
01-06-2016
Publisher
Springer Netherlands
Published in
Cellular Oncology / Issue 3/2016
Print ISSN: 2211-3428
Electronic ISSN: 2211-3436
DOI
https://doi.org/10.1007/s13402-016-0272-x

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