본 연구는 참취 에탄올 추출물과 용매분획물의 항산화 활성과 총 폴리페놀 함량 및 총 플라보노이드 함량을 측정하고, 생리활성과 항산화 성분 간의 상관관계를 비교 분석하였다. 총 폴리페놀 함량은 70% 에탄올 추출물 99.6 mg GAE eq/g으로 나타났으며, ethyl acetate 분획물 141.9 mg GAE eq/g으로 다른 분획물보다 높은 함량을 나타내었다(p<0.05). 또한 총 플라보노이드 함량도 ethyl acetate 분획물에서 105.6 mg QUE eq/g으로 높은 함량을 나타내었다(p<0.05). DPPH 라디칼 소거능과 ABTS 라디칼 소거능의 경우 ethyl acetate 분획물 1,000 ${mu}g/mL$ 농도에서 97.1% 및 98.7%를 보여 대조군인 ascorbic acid, ${alpha}$-tocopherol 및 BHT와 유사한 소거능을 나타내었다(p<0.05). SOD 유사활성은 ethyl acetate 분획물 1,000 ${mu}g/mL$ 농도에서 42.8%의 활성을 나타내어 DPPH, ABTS 라디칼 소거능보다 비교적 낮은 활성을 나타내었다(p<0.05). FRAP에 의한 환원력 측정 결과에서도 ethyl acetate 분획물에서 높은 활성을 나타내었다(p<0.05). 그러나 $Fe^{2+}$ chelating 활성 측정은 chloroform 분획물 1,000 ${mu}g/mL$ 농도에서 81.8%로 높게 나타났으며, 오히려 ethyl acetate 분획물에서는 6.2%로 가장 낮게 나타났다(p<0.05). 이상의 결과 참취 70% 에탄올 추출물과 용매 분획물 중 ethyl acetate 분획물이 다량의 폴리페놀과 플라보노이드를 함유하고 있으며, 항산화 효과가 높게 나타났다. 따라서 참취는 천연 항산화 소재 및 기능성식품으로의 활용 가능한 약용 식물자원인 것으로 판단된다.
As an effort to develop functional food ingredients and to discover the biological activity, the total phenolic content, total flavonoid content, DPPH and ABTS radical scavenging activity, SOD-like activity, ferric reducing antioxidant power (FRAP), and $Fe^{2+}$ chelating of Aster scaber were measured using a 70% ethanol extract and various solvent fractions. As a result, the total phenolic concent was highest in an ethyl acetate fraction of 141.9 mg GAE eq/g and the total flavonoid content was 105.6 mg QUE eq/g. The DPPH radical scavenging activity was highest in an ethyl acetate fraction of 97.1% at a concentration of 1,000 ${mu}g/mL$ (p<0.05). The ABTS radical scavenging activity showed a 86.9% ethyl acetate fraction and a 57.9% butanol fraction at a concentration of 125 ${mu}g/mL$, and higher than that of positive control (${alpha}$-tocopherol and BHT) (p<0.05). The SOD-like activity showed 42.8% in an ethyl acetate at a concentration of 1,000 ${mu}g/mL$. The ethyl acetate fraction showed the highest value of FRAP at 1051.9 ${mu}M$ and a concentration of 1,000 ${mu}g/mL$ (p<0.05). The $Fe^{2+}$chelating was highest in the 70.1% chloroform fraction at a concentration of 500 ${mu}g/mL$ (p<0.05). There is the highest correlation between DPPH radical scavenging activity and FRAP (r=0.981) as compared to other antioxidant assays (p<0.01). With these results, we confirmed that the ethyl acetate fraction of Aster scaber has great antioxidant potential. So it can be expected to be developed into a specific functional food ingredient.
