Herbal medicines are efficient to reduce side effects in the fight against glioblastoma, which plays a critical role within brain cancer species. The recent studies designated for testing the effects of lichens that have shown numerous anticancer activities on glioblastoma so far. In the present study, different concentrations of water extract obtained from Usnea longissima Ach. were used in order to determine cytotoxic (via 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide and lactate dehydrogenase tests), antioxidant (via total antioxidant capacity test), pro-oxidant (via total oxidant status test) and genotoxic (via 8-hydroxy-2′-deoxyguanosine test) effects of them on human U87MG-glioblastoma cancer cell lines. Primary mixed glial-neuronal non-cancerous cells from Sprague-Dawley rats were also utilized to measure the effects of treatments on non-cancerous cells. Based on median inhibitory concentration values, the data belonged to non-cancerous cells (2486.71 mg/l) showed distinct towering compared to U87MG (80.93 mg/L) cells. The viability of non-cancerous and U87MG cells exposed to extract is decreased in a dose dependent manner. It was also showed that low concentrations of extract notably increased total antioxidant capacity on non-cancerous cells. In addition, various phenolic compounds in extract were detected through high-performance liquid chromatography. The recent results encourage that extract will be able to have therapeutic potential against glioblastoma.
The aim of this study was to investigate the antifungal effects and molecular changes caused by Usnea longissima Ach. extracts against Fusarium greaminearum. In agar well diffusion assay, the zone of inhibition increased as the concentration increased in both of methanol and acetone extracts (1, 10, 20 and 50 mg/ml). In terms of bioactivities, 1 mg/ml was active, while other concentrations were very active. At the molecular level, changes caused by 50 mg/ml methanol extract was analyzed by qPCR with terms of cat, mst20, and tri5 genes, which are associated with antioxidation, apoptosis, and trichothecene production, respectively. Transcript levels of tri5 decreased (0.29 fold) while cat (2.41 fold) and mst20 (1.48 fold) increased. Findings from this study showed that U. longissima extracts could be natural antifungal agent against worldwide phytopathogen F. graminearum.
There are different herbal methods used for support in many cancer diseases. Lichens are important organisms containing unique herbal compounds and it is known that they have different anticancer activities. Starting from these features, the present study was aimed to investigate anticancer activity of friedelin (FRI), a lichen compound against glioblastoma multiforme (GBM) showed dangerous malignant properties within brain cancer species. It was used human U87MG-GBM cancer cell lines and primary rat cerebral cortex (PRCC) non-cancerous cells isolated from Sprague-Dawley rats in order to determine side effect level of FRI. In the experiments, cytotoxic (via 3-(4,5-dimethylthiazol-2-yl)-2,5diphenyltetrazolium bromide (MTT) and lactate dehydrogenase (LDH) tests), antioxidant (via total antioxidant capacity (TAC) test), pro-oxidant (via total oxidative stress (TOS) test) and genotoxic (via 8hydroxy-2′-deoxyguanosine (8-OH-dG) test) activities of different concentrations of FRI were tested. As a result of the study, MTT assay revealed that FRI showed higher cytotoxic activity on U87MG cells compared to PRCC cells (median inhibitory concentration (IC50): 46.38 and 1271.77 mg/L, respectively). Based on U87MG cells, it was determined a significant positive correlation between LDH and TOS activities. High positive correlation between TAC and cell viability on healthy PRCC cells exhibited antioxidant capacity of FRI. Consequently, the results obtained from the present study proved the potential of natural product with an antioxidant capacity as a source for anticancer compound against GBM.
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