Eugenol potentiates cisplatin anti-cancer activity through inhibition of ALDH-positive breast cancer stem cells and the NF-κB signaling pathway.
Mol Carcinog
; 57(3): 333-346, 2018 03.
Article
em En
| MEDLINE
| ID: mdl-29073729
ABSTRACT
Triple-negative breast tumors are very aggressive and contain relatively high proportion of cancer stem cells, and are resistant to chemotherapeutic drugs including cisplatin. To overcome these limitations, we combined eugenol, a natural polyphenolic molecule, with cisplatin to normalize cisplatin mediated toxicity and potential drug resistance. Interestingly, the combination treatment provided significantly greater cytotoxic and pro-apoptotic effects as compared to treatment with eugenol or cisplatin alone on several triple-negative breast cancer cells both in vitro and in vivo. Furthermore, adding eugenol to cisplatin potentiated the inhibition of breast cancer stem cells by inhibiting ALDH enzyme activity and ALDH-positive tumor initiating cells. We provide also clear evidence that eugenol potentiates cisplatin inhibition of the NF-κB signaling pathway. Indeed, the binding of NF-κB to its cognate binding sites present in the promoters of IL-6 and IL-8 was dramatically reduced, which led to potent down-regulation of the IL-6 and IL-8 cytokines upon combination treatment relative to the single agents. Similar effects were observed on proliferation, inhibition of epithelial-to-mesenchymal transition and stemness markers in tumor xenografts. These results provide strong preclinical justification for combining cisplatin with eugenol as therapeutic approach for triple-negative breast cancers through targeting the resistant ALDH-positive cells and inhibiting the NF-κB pathway.
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Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Células-Tronco Neoplásicas
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Neoplasias da Mama
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Eugenol
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NF-kappa B
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Cisplatino
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Aldeído Desidrogenase
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Antineoplásicos
Limite:
Animals
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Female
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Humans
Idioma:
En
Ano de publicação:
2018
Tipo de documento:
Article