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• W3048396757 abstract "Globally, breast cancer is the most common malignancy in women and the second most common cause of cancer-related death among women. There is therefore a need to identify more efficacious therapies for this neoplasm. Galenia africana (Kraalbos) is a perennial shrub found in Southern Africa and is used by the indigenous people to treat various ailments. There has therefore been much interest to establish the scientific basis for the medicinal properties of Kraalbos. This study aimed to investigate and characterise the anti-cancer activity of an ethanolic extract of Kraalbos leaves, KB2, against oestrogen receptor positive (MCF-7) and triple negative (MDA-MB-231) breast cancer cells. LC-MS/MS analyses identified the phytochemicals 7'-hydroxyflavanone, 5',7'-dihydroxyflavanone, 2',4'-dihydroxydihydrochalcone and 2',4'-dihydroxychalcone in KB2. KB2 exhibited an IC50 of 114 µg/ml and 130.5 µg/ml in MCF-7 and MDA-MB-231 cells respectively, selectively inhibited their long-term survival and reduced their migration which correlated with a decrease in EMT markers. It induced oxidative stress (ROS), DNA damage (increased levels of γ-H2AX), and triggered cell cycle arrests in MCF-7 and MDA-MB-231 cells. Importantly, KB2 activated intrinsic (cleaved caspase 9) and extrinsic (cleaved caspase 8) apoptosis, necroptosis (p-RIP3 and the downstream target of the necrosome, pMLKL) and autophagy (LC3II). Co-treatment of the breast cancer cells with KB2 and the autophagy inhibitor bafilomycin A1 resulted in a significant increase in cell viability which suggests that KB2 induced autophagy is a cell death mechanism." @default.
• W3048396757 created "2020-08-18" @default.
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• W3048396757 date "2020-10-01" @default.
• W3048396757 modified "2023-10-17" @default.
• W3048396757 title "Galenia africana plant extract exhibits cytotoxicity in breast cancer cells by inducing multiple programmed cell death pathways" @default.
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• W3048396757 doi "https://doi.org/10.1016/j.jsps.2020.08.004" @default.
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