[논문]왕대, 조릿대, 오죽의 추출 용매에 따른 항산화, 신경염증제어 활성 및 지표성분 caffeic acid, p-coumaric acid, tricin의 함량 비교

김연숙; 조덕연; 김미경; 최동국

doi:10.9721/kjfst.2021.53.3.296

왕대, 조릿대, 오죽의 추출 용매에 따른 항산화, 신경염증제어 활성 및 지표성분 caffeic acid, p-coumaric acid, tricin의 함량 비교
Comparative study of antioxidant and anti-neuroinflammatory activity of leaf extracts of three different species of Bamboos in different extraction solvents containing caffeic acid, p-coumaric acid and tricin 원문보기

한국식품과학회지 = Korean journal of food science and technology, v.53 no.3, 2021년, pp.296 - 303

김연숙 (건국대학교 생명공학과) , 조덕연 (건국대학교 대학원 응용생명과학과) , 김미경 (태웅식품) , 최동국 (건국대학교 생명공학과)

초록
AI-Helper

본 연구에서는 국내에 자생하는 대나무 중 3종(왕대, 조릿대, 오죽)의 죽엽을 4종의 추출용매(물, 30% 주정, 70% 주정, 100% 주정)를 이용하여 추출 후 추출물별 항산화 활성 탐색, 신경염증 억제 효과 및 HPLC-UV 분석 방법에 의한 3가지 지표성분(caffeic acid, p-coumaric acid 및 Tricin)의 함량을 측정하였다. FRAP 방법과 DPPH 라디칼 및 ABTS 라디칼 소거능 측정방법을 이용하여 항산화 활성을 탐색하였으며, 3종의 대나무 중에서는 오죽 추출물이 총폴리페놀 및 총플라보노이드 함량이 가장 높았다. FRAP 방법, DPPH 라디칼 및 ABTS 라디칼 소거능 방법을 이용하여 항산화 활성을 측정한 결과 또한 오죽 추출물이 가장 우수하였다. Caffeic acid의 함량은 오죽의 물추출물이 6.247±0.049 ㎍/mg으로 가장 높았으며, p-coumaric acid의 함량은 오죽의 70% 주정추출물이 10.931±1.467 ㎍/mg으로 가장 높았으며 다음으로는 오죽의 100% 주정추출물이 9.374±1.140 ㎍/mg으로 높게 나타났으며 3종 죽엽의 물추출물을 제외한 주정추출물은 모두 p-coumaric acid 함량이 높음을 확인하였다. Tricin의 함량을 측정한 결과 또한 물추출물에서는 함량이 낮았으나, 70% 주정추출물이나 100% 주정추출물은 3종의 죽엽추출물 모두에서 3.094±0.875-5.233±2.698 ㎍/mg로 비슷한 함량을 나타내었다. LPS를 사용하여 미세아교세포의 활성화를 유도하여 신경염증반응의 지표인 NO의 생성량을 측정한 결과 3종의 죽엽추출물(70% 주정추출물) 모두 농도 의존적으로 NO의 생성량을 억제하였다. 따라서 본 연구의 결과는 죽엽추출물이 미세아교세포의 과도한 신경염증 활성화로 인해 발생되는 뇌 신경질환의 치료 소재로서 활용 가능성을 제시하였다.

Abstract ▼ AI-Helper

The antioxidant and anti-neuroinflammatory activities of water, 30, 70, and 100% ethanol extracts of leaves of three different species of bamboo (Phyllostachys nigra, P. bambusoides, and Sasa borealis) were investigated. The levels of total polyphenol and flavonoid were measured, and antioxidant activity was evaluated using various antioxidant assays (DPPH, ABTS, and FRAP). Lipopolysaccharide (LPS)-induced BV2 microglial cell activation was used to evaluate the anti-neuroinflammatory properties of the bamboo leaf extracts. Treatment with both aqueous and ethanolic extracts showed no cytotoxicity in BV-2 microglial cells. Pre-treatment of BV-2 cells with bamboo leaf extracts significantly inhibited LPS-induced excessive production of nitric oxide in a dose-dependent manner. Moreover, phytochemical analysis based on the extraction solvent showed that caffeic acid, p-coumaric acid, and tricin are the principal constituents of all three bamboo leaf extracts. Therefore, our findings suggest that bamboo leaf extract contains potent antioxidants and anti-neuroinflammatory compounds that can be used as potential therapeutic agents for the treat neuroinflammatory diseases.

주제어

표/그림 (6)

그림 Fig. 1. The structure of caffeic acid, p-coumaric acid and tricin.
표 Table 1. Extraction yields, total polyphenol, flavonoid contents, FRAP and TEAC values of the various bamboo leaf extracts
표 Table 2. Analytical conditions of HPLC for various bamboo leaf extracts
그림 Fig. 2. Effect of bamboo leaves extracts (A) P.bambusoides, (B) P.nigra, (C) S.borealis) on DPPH radical scavenging activity. Different letters (a-f) represent statistically significant differences (p<0.05).
그림 Fig. 3. Effect of bamboo leaves extracts on NO production in LPS-stimulated BV2 cells. The BV2 cells were treated with samples at various concentrations (25, 50, 100, and 200 μg/mL) with or without LPS (200 ng/mL) for 20 h. The nitrite in the culture supernatant was evaluated using Griess reagent. Data are presented as the mean±SD (n=3) for three independent experiments. ###p<0.001 versus control, ***p<0.001 versus LPS are significantly different as analyzed by one-way ANOVA followed by Tukey's test.
표 Table 3. Tricin, p-coumaric acid and caffeic acid contents of various bamboo leaf extracts

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