비쭈기 나무(Cleyera japonica) 추출물의 생리활성에 대한 연구

Abstract

In this study, we investigated the applicability of functional materials by examining a variety of physiological activities with the extract of Cleyera japonica leaf. Cleyera japonica extract showed a low cytotoxicity against murine melanoma B16F10 cells. In little or no cytotoxicity at concentrations, we showed that the treatment with Cleyera japonica extract resulted in a significant increase in the DPPH radical scavenging activity (IC50, 22.90 ㎎/L), similar to ascorbic acid (IC50, 18.65 ㎎/L) and anti-microbial activities against Bacillus subtilis, Escherichia coli, and Candida albicans. In particular, anti-microbial activities against Gram-positive bacteria was high. These results suggest that Cleyera japonica extract could be used as a natural preservative. Additionally, Cleyera japonica extract showed the inhibition of tyrosinase activity (IC50, 178.90 ㎎/L), similar to kojic acid (IC50, 89.13 ㎎/L) and decreased melanin content (IC50, 101.90 ㎎/L) higher than the control arbutin level (IC50, 100.65 ㎎/L), especially. Therefore, these results indicate that Cleyera japonica extract may be an effective material for functional cosmetics such as skin whitening materials.