RESUMO
BACKGROUND: Fomitopsis officinalis (Vill. ex Fr. Bond. et Sing) is a medicinal mushroom, commonly called 'Agarikon'; it has traditionally been used to treat cough and asthma in the Mongolian population. OBJECTIVE: The objective of the study was to examine the significance of biological activity of F. officinalis and evaluation of the antioxidant activity and anticancer activity of six fractions of F. officinalis residues (Fo1-powder form dissolved in ethanol, Fo2-petroleum ether residue, Fo3-chloroformic, Fo4-ethylacetate, Fo5-buthanolic, and Fo6-waterethanolic) against hepatocellular carcinoma cells. METHODS: We performed in vitro studies of cell proliferation and viability assay, annexin V-FITC/Propidium Iodide assay, and NF-kB signaling pathway by immunoblot analysis. RESULTS: Our findings revealed that all six fractions/extracts have antioxidant activity, and somehow, they exert anticancerous effects against cancer cells. In cancerous cell lines (HepG2 and LO2), Fo3 chloroformic extract promoted the cancer cell apoptosis and cell viability, activated G2/M-phase cell cycle, and selectively induced NF-kB proteins, revealing as a novel antitumor extract. CONCLUSION: This study reports that Fo3-chloroformic extract is rich in antitumor activity, which was previously not investigated in cancer. To develop the impact of F. officinalis among natural products to treat/prevent oxidative stress disorders or cancers, further examinations of F. officinalis are needed to develop new natural drugs to treat cancer. However, this study assessed only one extract, Fo3-chloroformic, which has a significant impact against cancer cell lines.
