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Biological Activities of Magnolia denudata Desr. Flower Extracts

목련(Magnolia denudata Desr.) 꽃 추출물의 생리활성

  • Nho, Jin-Woo (Dept. of Food Science and Technology, Chungbuk National University) ;
  • Hwang, In-Guk (Dept. of Food Science and Technology, Chungbuk National University) ;
  • Joung, Eun-Mi (Dept. of Food Science and Technology, Chungbuk National University) ;
  • Kim, Hyun-Young (Dept. of Food Science and Technology, Chungbuk National University) ;
  • Chang, Seong-Jun (R&D Headquarters, Taekyung Nongsan Co. LTD.) ;
  • Jeong, Heon-Sang (Dept. of Food Science and Technology, Chungbuk National University)
  • Published : 2009.11.30

Abstract

The antioxidant, antiproliferation, and nitrate synthesis inhibitory effects of Magnolia denudata extracts (ME) were evaluated. The ME was extracted with 70% (v/v) ethanol and fractionated with solvents of hexane, chloroform, ethyl acetate, n-buthanol and aqueous. The ethyl acetate fraction contained the highest phenolic and flavonoid contents of 427.10 mg garlic acid eq/g and 356.05 mg catechin eq/g, respectively. The ethyl acetate fraction showed strong 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging activity with a 50% inhibition concentration ($IC_{50}$) of 0.20 mg/mL and total antioxidant activity was 0.90 mg AA eq/100 mg. From the results of cytotoxic effects of HCT116, NCL-H460, and HepG2 human cancer cells by MTT assay on the ME and its solvent fraction, chloroform fraction showed the highest cytotoxic effect ($IC_{50}$ value: 0.14, 0.37, and 0.41 mg/mL, respectively). Nitrate synthesis inhibitory effect of ME and its solvent fractions on nitric oxide synthase activity in LPS stimulated RAW 264.7 cells were decreased in dose-dependent manners, and $IC_{50}$ value of hexane and chloroform fractions were 0.39 and 0.49 mg/mL, respectively.

목련 꽃 에탄올 추출물과 용매분획물에 대한 항산화활성, 항암활성 및 항염증활성을 살펴본 결과는 다음과 같다. 목련꽃 추출물의 총 폴리페놀과 플라보노이드 함량은 216.14 및 86.93 mg/g이었고, DPPH법에 의한 항산화활성의 $IC_{50}$값은 0.232 mg/mL이었으며, 용매분획물 중 에틸아세테이트 분획물이 우수한 항산화활성을 보였다($IC_{50}$: 0.197 mg/mL, AEAC: 0.90 mg AA eq/100 mg). 또한 에탄올 추출물 및 용매분획물은 대장암, 폐암 그리고 간암세포에 대하여 선택적으로 낮은 농도에서 증식억제효과를 보였으며, 클로로포름 분획물은 리포폴리사카라이드 유도 일산화질소 생성 저해효과를 보였다($IC_{50}$: 49.5 $\mu$g/mL).

Keywords

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