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Abstract Title:

Formononetin Enhances the Tumoricidal Effect of Everolimus in Breast Cancer MDA-MB-468 Cells by Suppressing the mTOR Pathway.

Abstract Source:

Evid Based Complement Alternat Med. 2019 ;2019:9610629. Epub 2019 Mar 17. PMID: 31007702

Abstract Author(s):

Qianmei Zhou, Weihong Zhang, Tian Li, Runwei Tang, Chaoran Li, Shuai Yuan, Desheng Fan

Article Affiliation:

Qianmei Zhou

Abstract:

Background: Formononetin, an active ingredient isolated from the traditional Chinese medicinal herb, has anticancer and chemoresistance-reducing biological activities. We evaluated the efficacy of formononetin in improving the tumoricidal effect of everolimus by suppressing the mTOR pathway in breast cancer cells.

Methods: Cell survival was assessed using an MTT assay. Apoptosis was detected using flow cytometry. Proteins related to the mTOR pathway were detected and assessed using real-time PCR and Western blot analysisThe results showed that formononetin enhances the efficacy of everolimus in suppressing breast cancer cell growth both in vitro and in vivo. The combination of formononetin and everolimus resulted in a 2-fold decrease in tumor volume and a 21.6% decrease in cell survival. The apoptosis ratio in cells treated with formononetin and everolimus increased by 27.9%. Formononetin and everolimus also inhibited the expression of p-mTOR and p-P70S6K and increased the expression of PTEN and p-4EBP-1. Notably, formononetin alone inhibited p-Akt expression but not everolimus.

Conclusions: Formononetin enhances the tumoricidal effect of everolimus by inhibiting the activity of Akt.

Study Type : Animal Study, In Vitro Study

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