마황 에탄올추출물의 Tyrosinase 활성 억제 및 Melanin 생성 억제 효과
The Effects of Ephedra sinica Ethanol Extract on Inhibition of Tyrosinase Activity and Melanin Generation
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This study observed the effects of Ephedra sinica (E. sinica ) ethanol extract in SK-MEL-2 cells ontyrosinase activity and melanin generation to identify its whitening activity and searched for changes inthe protein expression of tyrosinase, TRP-1 and TRP-2 which are involved in melanin synthesis. Also,α-MSH, a melanin-stimulating enzyme was applied to skin to induce hyperpigmentation and to identifythe skin whitening effect. The following results were obtained. As a result of measuring its tyrosinaseinhibitory activity in vitro , it showed good inhibitory rates depending on concentration. When its effect ontyrosinase activity and melanin generation in SK-MEL-2 cell was analysed, tyrosinase activity decreased ata concentration of 50 ㎍/mL and with arbutin at 82.2%, and tyrosinase activity decreased 70.4% in E. sinicaethanol extract. As a result of measuring melanin generation, arbutin was inhibited 83.6% in 50 ㎍/mL ,and 64% of E. sinica ethanol extract inhibited melanin. In investigating the effect of tyrosinase, TRP-1 andTRP-2 on protein expression in hyperpigmentation by α-MSH using western blot, E. sinica ethanol extractmade the expression of tyrosinase and TRP2 decrease more significantly than arbutin. Therefore, E. sinicaethanol extract showed good effects in inhibiting tyrosinase activity and melanin generation in SK-MEL-2cells, and inhibited melanin synthesis through inhibition of gene expression. Also, it effectively decreasedthe generation of tyrosinase and melanin increased by α-MSH. Based on the results above, it is suggestedthat E. sinica can be developed as a natural skin care material for use in whitening.
Abstract
This study observed the effects of Ephedra sinica (E. sinica ) ethanol extract in SK-MEL-2 cells ontyrosinase activity and melanin generation to identify its whitening activity and searched for changes inthe protein expression of tyrosinase, TRP-1 and TRP-2 which are involved in melanin synthesis. Also,α-MSH, a melanin-stimulating enzyme was applied to skin to induce hyperpigmentation and to identifythe skin whitening effect. The following results were obtained. As a result of measuring its tyrosinaseinhibitory activity in vitro , it showed good inhibitory rates depending on concentration. When its effect ontyrosinase activity and melanin generation in SK-MEL-2 cell was analysed, tyrosinase activity decreased ata concentration of 50 ㎍/mL and with arbutin at 82.2%, and tyrosinase activity decreased 70.4% in E. sinicaethanol extract. As a result of measuring melanin generation, arbutin was inhibited 83.6% in 50 ㎍/mL ,and 64% of E. sinica ethanol extract inhibited melanin. In investigating the effect of tyrosinase, TRP-1 andTRP-2 on protein expression in hyperpigmentation by α-MSH using western blot, E. sinica ethanol extractmade the expression of tyrosinase and TRP2 decrease more significantly than arbutin. Therefore, E. sinicaethanol extract showed good effects in inhibiting tyrosinase activity and melanin generation in SK-MEL-2cells, and inhibited melanin synthesis through inhibition of gene expression. Also, it effectively decreasedthe generation of tyrosinase and melanin increased by α-MSH. Based on the results above, it is suggestedthat E. sinica can be developed as a natural skin care material for use in whitening.
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