Evaluation of Garcinia cowa Leaf Extract as A Potential Anticancer Agent: Cytotoxicity, Selectivity, and Apoptotic Effects on MCF-7/HER-2 Cells

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Mainal Furqan
Fatma S. Wahyuni
Meri Susanti
Dachriyanus Hamidi

Abstract

The global burden of cancer highlights the urgent need for therapeutic agents that are both effective and selective, with natural plant-derived compounds offering promising medicinal potential.This study aims to evaluate the anticancer potential of Garcinia cowa Roxb. leaf extract, a plant known for its medicinal properties, especially the cytotoxic effect, cell cycle inhibition, apoptosis in MCF-7/HER-2 breast cancer cell lines, and selectivity against normal Vero cells. The cytotoxic activity of G. cowa leaf extract against MCF-7/HER-2 cell lines was assessed using the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay. Flow cytometry was conducted at the extract’s IC50 concentration for cell cycle modulation and apoptosis analysis, and the results were analysed using a FACSCalibur flow cytometer. G. cowa leaf extract demonstrated strong cytotoxic activity with an IC50 of 15.68 μg/mL against MCF-7/HER-2 cell lines and 303.6 μg/mL against normal Vero cells, yielding a selectivity index above 3. The extract significantly altered the MCF-7/HER-2 cell cycle, reducing G0-G1 phase cells from 38.1% to 29.9% and increasing the S phase (7.5% to 9.7%) and G2-M phase (49.5% to 55.3%), indicating cell cycle arrest. Additionally, the extract reduced early apoptosis from 5.5% to 2.7% and increased late apoptosis from 5.4% to 12.2%, while necrosis rose from 3.8% to 14.6%, reflecting enhanced apoptosis, necrosis, and cell accumulation in the S and G2-M phases. G. cowa leaf extract showed strong anticancer potential against MCF-7/HER-2 cells by disrupting the cell cycle and promoting apoptosis and necrosis, with high selectivity for cancer cells. 

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Furqan, M., Wahyuni, F. S., Susanti, M., & Hamidi, D. (2025). Evaluation of Garcinia cowa Leaf Extract as A Potential Anticancer Agent: Cytotoxicity, Selectivity, and Apoptotic Effects on MCF-7/HER-2 Cells. Tropical Journal of Natural Product Research (TJNPR), 9(2), 846 – 852. https://doi.org/10.26538/tjnpr/v9i2.54
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