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Abstract Title:

Pitaya Extracts Induce Growth Inhibition and Proapoptotic Effects on Human Cell Lines of Breast Cancer via Downregulation of Estrogen Receptor Gene Expression.

Abstract Source:

Oxid Med Cell Longev. 2017 ;2017:7865073. Epub 2017 Jul 6. PMID: 28761624

Abstract Author(s):

Deborah de Almeida Bauer Guimarães, Danielle Dos Santos Bonfim De Castro, Felipe Leite de Oliveira, Eduardo Matos Nogueira, Marco Antônio Mota da Silva, Anderson Junger Teodoro

Article Affiliation:

Deborah de Almeida Bauer Guimarães

Abstract:

Breast cancer is one of the most prevalent cancers in the world and is also the leading cause of cancer death in women. The use of bioactive compounds of functional foods contributes to reduce the risk of chronic diseases, such as cancer and vascular disorders. In this study, we evaluated the antioxidant potential and the influence of pitaya extract (PE) on cell viability, colony formation, cell cycle, apoptosis, and expression of BRCA1, BRCA2, PRAB, and Erα in breast cancer cell lines (MCF-7 and MDA-MB-435). PE showed high antioxidant activity and high values of anthocyanins (74.65 ± 2.18). We observed a selective decrease in cell proliferation caused by PE in MCF-7 (ER+) cell line. Cell cycle analysis revealed that PE induced an increase in G0/G1 phase followed by a decrease in G2/M phase. Also, PE induced apoptosis in MCF-7 (ER+) cell line and suppressed BRCA1, BRCA2, PRAB, and Erα gene expression. Finally, we also demonstrate that no effect was observed with MDA-MB-435 cells (ER-) after PE treatment. Taken together, the present studysuggests that pitaya may have a protective effect against breast cancer.

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