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Invest New Drugs. 2018 Oct;36(5):782-796. doi: 10.1007/s10637-018-0568-y. Epub 2018 Feb 2.

Pre-clinical effects of metformin and aspirin on the cell lines of different breast cancer subtypes.

Author information

1
Programa de Pós-Graduação em Biologia Celular e Molecular, Escola de Ciências, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Av. Ipiranga, 6681, Porto Alegre, RS, 90619-900, Brazil.
2
Centro de Pesquisa em Toxicologia e Farmacologia, Escola de Ciências da Saúde, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Av. Ipiranga, 6681, Porto Alegre, RS, 90619-900, Brazil.
3
ZebLab & Laboratório de Biologia e Desenvolvimento do Sistema Nervoso, Escola de Ciências, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Av. Ipiranga 6681, Prédio 12 D, sala 301, Porto Alegre, RS, 90619-900, Brazil.
4
Laboratório de Biologia de Sistemas Computacionais, Escola de Ciências, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Av. Ipiranga, 6681, Porto Alegre, RS, 90619-900, Brazil.
5
Programa de Pós-Graduação em Biologia Celular e Molecular, Escola de Ciências, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Av. Ipiranga, 6681, Porto Alegre, RS, 90619-900, Brazil. maria.campos@pucrs.br.
6
Centro de Pesquisa em Toxicologia e Farmacologia, Escola de Ciências da Saúde, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Av. Ipiranga, 6681, Porto Alegre, RS, 90619-900, Brazil. maria.campos@pucrs.br.
7
Programa de Pós-Graduação em Odontologia, Escola de Ciências da Saúde, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Av. Ipiranga, 6681, Porto Alegre, RS, 90619-900, Brazil. maria.campos@pucrs.br.

Abstract

Background Breast cancer is highly prevalent among women worldwide. It is classified into three main subtypes: estrogen receptor positive (ER+), human epidermal growth factor receptor 2 positive (HER2+), and triple negative breast cancer (TNBC). This study has evaluated the effects of aspirin and metformin, isolated or in a combination, in breast cancer cells of the different subtypes. Methods The breast cancer cell lines MCF-7, MDA-MB-231, and SK-BR-3 were treated with aspirin and/or metformin (0.01 mM - 10 mM); functional in vitro assays were performed. The interactions with the estrogen receptors (ER) were evaluated in silico. Results Metformin (2.5, 5 and 10 mM) altered the morphology and reduced the viability and migration of the ER+ cell line MCF-7, whereas aspirin triggered this effect only at 10 mM. A synergistic effect for the combination of metformin and aspirin (2.5, 5 or 10 mM each) was observed in the TNBC cell subtype MDA-MB-231, according to the evaluation of its viability and colony formation. Partial inhibitory effects were observed for either of the drugs in the HER2+ cell subtype SK-BR-3. The effects of metformin and aspirin partly relied on cyclooxygenase-2 (COX-2) upregulation, without the production of lipoxins. In silico, metformin and aspirin bound to the ERα receptor with the same energy. Conclusion We have provided novel evidence on the mechanisms of action of aspirin and metformin in breast cancer cells, showing favorable outcomes for these drugs in the ER+ and TNBC subtypes.

KEYWORDS:

Aspirin; Breast cance; Drug repurposing; Metformin

PMID:
29392539
DOI:
10.1007/s10637-018-0568-y

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