DDDR-03. DEVELOPMENT OF ANTI-TUMOR AROMA THERAPY FOR GLIOBLASTOMA WITH LEMONGRASS ESSENTIAL OIL

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Abstract INTRODUCTION Aroma essential oils apply to cancer therapy because of their immune-enhancing and sedative effects, and their ability to reduce the side effects of chemotherapy. Recently, aroma essential oils have also been reported to have anti-tumor effects. We investigate the anti-tumor effects of aromatic compounds contained in essential oils as a novel treatment for glioblastoma. In this study, we analyzed the antitumor effect of lemongrass essential oil and investigated its antitumor aroma therapy for glioblastoma. methods and RESULTS Human glioblastoma cells (U87, T98G) and mouse brain tumor cells (RSV-M) were used in the study. Tumor cells were cultured in the presence of lemongrass essential oil for 72 hours, and the growth inhibitory effect was observed, suggesting that the evaporated lemongrass essential oil components acted on tumor cells in the vicinity. In addition, a similar effect was observed with citral alone, which is the main component of lemongrass. Analysis of the effects of citral revealed that citral strongly binds to MARK4 and inhibits its enzyme activity, and that citral decreases the phosphorylation of tau protein. Next, a mouse brain tumor model with RSV-M was established, and the anti-tumor effect of lemongrass essential oil was studied. The results showed that the mice that inhaled lemongrass essential oil for 12 h/day had a significantly prolonged survival period compared to the control group. DISCUSSION Citral is the main component of lemongrass essential oil, which contains 70-80% of lemongrass essential oil. This study suggests a mechanism of inhibition of tumor cell proliferation by citral in malignant gliomas. Citral is a volatile monoterpene, and its anti-tumor effect was demonstrated by diffusion through evaporation. CONCLUSION Citral in lemongrass essential oil shows anti-tumor effects and is expected to be applied to a new glioblastoma therapy using “aroma”

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