Cotoneaster horizontalis Decne 추출물의 항산화 및 항염증 활성
Anti-Oxidative and Anti-Inflammatory Activities of Cotoneaster horizontalis Decne Extract
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Cotoneaster horizontalis Decne 에탄올 추출물(CHEE)의 항산화능과 항염증 생리활성을 분석하였다. CHEE의 항산화능을 DPPH radical scavenging activity로 분석한 결과 radical 소거능의 정도가 양성 대조군으로 사용한 ascorbic acid와 유사한 정도의 높은 활성을 보여 매우 강한 항산화능을 보유함을 확인하였다. 또한 RAW 264.7 세포주를 이용하여 H2O2 유도에 의해 생성된 ROS에 대한 소거능을 분석한 결과에서도 강한 소거능을 보였다. 뿐만 아니라 항산화효소 HO-1 및 그 전사 인자인 Nrf2의 단백질 발현이 CHEE의 처리에 의해 증가되었다. 한편 CHEE가 LPS에 의해 유도된 NO 생성에 미치는 영향을 분석한 결과 농도의존적인 NO 생성 저해능을 보였으며 이는 NO 생성 단백질인 iNOS의 발현 저해에서 기인함을 확인하였다. 이러한 결과를 통해 C. horizontalis의 항산화능과 항염증 활성을 세포 수준에서 처음으로 확인하였으며 향후 기능성 소재로서 유용하게 활용될 수 있을 것으로 판단된다.
Abstract
Anti-oxidative and anti-inflammatory activities of Cotoneaster horizontalis Decne ethanol extract (CHEE) were evaluated. CHEE possessed a potent scavenging activity against 1,1-diphenyl-2-picryl hydrazyl, which was similar to the activity of ascorbic acid which was used as a positive control. CHEE also effectively suppressed hydrogen peroxide-induced reactive oxygen species on RAW 264.7 cells. Furthermore, CHEE induced the expression of the anti-oxidative enzyme heme oxygenase 1, and its upstream transcription factor, nuclear factor-E2-related factor 2. CHEE inhibited LPS induced nitric oxide (NO) formation as a consequence of inducible NO synthase (iNOS) down regulation. Taken together, these results provide us with an important new insight; that C. horizontalis possesses anti-oxidative and anti-inflammatory activities. Therefore, C. horizontalis may be utilized as a promising material in the field of nutraceuticals.
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