Abstract

백년초를 80% (v/v) 에탄올-물 혼합용액으로 추출하여 총페놀 함량, 총플라보노이드 함량, 산화방지능, 신경세포 보호효과, AChE 및 BChE 활성저해능을 평가하였다. 백년초 100 g FW당 총페놀 함량은 409.9 mg GAE, 총플라보노이드 함량은 72.2 mg CE이었다. 백년초(100 g FW)의 산화방지능은 ABTS, DPPH, ORAC법에서 각각 381.2, 298.2, 3,219.9 mg VCE였다. 백년초 추출물은 <TEX>$H_2O_2$</TEX>의 산화 스트레스로부터 세포 내 산화 스트레스를 감소시켜 신경세포 PC-12의 생존율을 농도의존적으로 증가시켰다. 또한, 백년초 추출물은 AChE 및 BChE 활성을 저해하였다. 본 연구 결과로부터 백년초의 세포 내 산화 스트레스 감소에 의한 신경 세포 보호능과 AChE 및 BChE 저해능이 확인 되었으며, 이러한 결과를 통해 향후 백년초를 이용한 기능성 제품 및 여러 가공품 개발에 활용이 가능할 것으로 기대한다. Oxidative stress caused by reactive oxygen species is ascribed to many neurodegenerative diseases like Alzheimer's disease. Phenolic antioxidants can reduce the oxidative stress. In this study, ripe fruits of Opuntia ficus-indica var. saboten (OFS) were extracted using 80% (v/v) aqueous ethanol. Total phenolic and flavonoid contents of the OFS fruits (100 g) were 409.9 mg gallic acid equivalents and 72.2 mg catechin equivalents, respectively. The OFS fruits had antioxidant capacity at 381.2, 298.2, and 3,219.9 mg vitamin C equivalents/100 g in ABTS, DPPH, and ORAC assays, respectively. The OFS fruits showed protective effects on PC-12 cells against oxidative stress in a dose-dependent manner, partly due to decrease of intracellular oxidative stress. Furthermore, the OFS fruits inhibited both acetylcholinesterase and butyrylcholinesterase. Consequently, these results suggest that the OFS fruits might be served as a source of functional materials to reduce oxidative stress in neuronal cells and to inhibit cholinesterases.

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