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Vosooghi, Ramin; Motavalizadehkakhky, Alireza; Mansouri, Atena; Mehrzad, Jamshid; Homayouni, Masood
Gene, 06/2024, Letnik: 911Journal Article
Display omitted •The most typical malignancy among women worldwide is breast cancer.•Estrogen receptor play an vital role in breast cancer.•Phosphorylation is affect the activity of Estrogen receptor.•Hesperidin is a glycosylated flavanone found in citrus fruits with anticancer effects. The most common malignancy among women worldwide is breast cancer. The estrogen receptor plays a vital role in this cancer. One of the most well-known mechanisms that affects the activity of this receptor is its phosphorylation by protein kinase pathways. Hesperetin, a flavonoid abundant in citrus species such as lemons, grapefruits, and oranges, is the aglycone form of hesperidin. It has undergone thorough evaluation for its potential anti-cancer properties, particularly in the context of breast cancer. Studies have shown that hesperetin has an effect on intracellular kinase pathways. The aim of this study was to investigate the effect of hesperetin on the expression, phosphorylation and activity of estrogen receptor alpha (ERα) in MCF-7 breast cancer cell line. MCF-7 cells were cultured in RPMI-1640 phenol red-free medium supplemented with charcoal-stripped FBS and treated with hesperetin. The MTT method was used to evaluate cell survival. The levels of the ERα protein and its phosphorylated form (Ser118) were determined via western blotting. A luciferase reporter vector was used to evaluate ERE activity. The results of this study indicated that hesperetin reduced the survival of MCF-7 cells in a dose-dependent manner. The expression and phosphorylation (at Ser118) of the ERα significantly increased and decreased, respectively, in the groups treated with hesperetin. Hesperetin increased the activity of the ERα in the absence of E2, although these differences were not statistically significant. Conversely, in the presence of E2, hesperetin caused a significant decrease in receptor activity. Based on the results of this study, it can be concluded that hesperetin has a significant effect on ERα expression, phosphorylation and activity.
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