The influence of antioxidant dietary-derived polyphenolic combination on breast cancer: Molecular study

Area of Science:

• Oncology
• Molecular Biology
• Pharmacology

Background:

• Breast cancer is a major global health concern, necessitating research into novel complementary treatments.
• Polyphenolic compounds are gaining attention for their potential anticancer properties.
• Investigating synergistic effects of combined polyphenols may offer new therapeutic strategies.

Purpose of the Study:

• To evaluate the anticancer efficacy of a polyphenol mixture (PFM) against human breast cancer cells (MCF-7 and MDA-MB-231).
• To explore the molecular mechanisms underlying PFM's antitumor effects.
• To assess PFM's impact on tumor-bearing mouse survival.

Main Methods:

• Cell proliferation inhibition assays (IC50 determination) using MCF-7 and MDA-MB-231 cells.
• Apoptosis and cell cycle analysis.
• RT-qPCR to analyze gene expression (miR-155, HK2, ZEB2).
• Wound healing assay for migration assessment.
• Ehrlich ascites carcinoma (EAC) tumor-bearing mouse model for survival studies.

Main Results:

• PFM demonstrated dose-dependent inhibition of breast cancer cell proliferation (IC50: 25.9 µg/ml for MCF-7, 29.4 µg/ml for MDA-MB-231).
• PFM induced apoptosis in MDA-MB-231 cells and S-phase cell cycle arrest in MCF-7 cells.
• PFM downregulated oncogenic miR-155 and hexokinase 2 (HK2), while upregulating ZEB2.
• PFM exhibited anti-migration effects and significantly increased median survival in EAC tumor-bearing mice.

Conclusions:

• The polyphenol mixture (PFM) exhibits significant antitumor effects against breast cancer cells in vitro and in vivo.
• PFM's mechanism may involve modulating miR-155 and HK2 expression, potentially targeting cancer cell metabolism and proliferation.
• Combined polyphenolic compounds in PFM may offer synergistic anticancer activity, warranting further investigation for complementary breast cancer therapy.