잔가시 모자반 추출물의 피부 노화 억제 효과를 확인하기 위하여 항산화 활성, tyrosinase 저해 활성, collagenase 저해 활성을 측정하였다. 잔가시 모자반 에탄올 및 물 추출물의 폴리페놀 함량은 11.20 mg/g 및 11.70 mg/g으로 차이가 나지 않았다. DPPH radical 소거능에서는 잔가시 모자반 에탄올 및 물 추출물 모두 0.5 mg/ml 농도에서 83.68% 및 79%로 활성이 높게 나타났으며, 금속봉쇄력에서는 에탄올 추출물이 물 추출물보다 높게 나왔으나 대조구인 EDTA보다 활성이 낮게 나타났다. Tyrosinase 및 collagenase 저해 활성은 에탄올 추출물이 물 추출물보다 더 높은 것으로 나타났고, collagenase 저해 활성은 에탄올 추출물이 1 mg/ml 농도에서 80% 이상으로 높은 효소 저해능을 보였다. 따라서, 잔가시 모자반은 에탄올 추출물에서 항산화능, tyrosinase 및 collagenase 저해 활성이 더 높게 나타나 피부 노화 억제를 위한 소재로서 더 효과적으로 이용될 수 있을 것으로 사료된다.

Sargassum micracanthum (SM) is a member of the family Sargassaceae and commonly occurs along the coast of Korea. Extracts from SM were evaluated for their antioxidant and collagenase and tyrosinase inhibitory activities based on their total phenolic concentration (TPC), 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging effect, and metal-chelating effect. The TPC of SM ethanol and water extracts used in the study was 11.20 and 11.70 mg/g of dry sample, respectively. Both SM ethanol and water extracts had high DPPH radical-scavenging effect. The metal-chelating effect of SM ethanol extract (40.47% at 0.5 mg/ml) was higher than that of water extract (23.28% at 0.5 mg/ml). With regard to the antiwrinkling effect, SM ethanol extract showed collagenase inhibitory activity with an IC50 value of 488.20 μg/ ml. Lastly, regarding the anti-melanogenesis effect, SM ethanol extract showed higher tyrosinase inhibitory activity (45.08% at 5 mg/ml) than that shown by the water extract (21.29% at 5 mg/ml). These results suggest that SM has the potential to be a resource with natural anti-melanogenesis, anti-wrinkle, and antioxidant effects.