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Functional Biological Activity of Hot Water and Ethanol Extracts from Taraxaci Herba

포공영의 열수 및 에탄올 추출물의 기능적 생리활성

  • 임애경 ((재)대구테크노파크 바이오산업지원센터) ;
  • 김정옥 ((재)대구경북한방산업진흥원) ;
  • 정미정 (강원대학교 생명공학부) ;
  • 정희경 ((재)대구테크노파크 바이오산업지원센터) ;
  • 홍주헌 ((재)대구테크노파크 바이오산업지원센터) ;
  • 김대익 ((재)대구테크노파크 바이오산업지원센터)
  • Published : 2008.10.31

Abstract

This study was conducted to investigate the functional biological effects of hot water and ethanol extracts from Taraxacum mongolicum (TM). Then, the hot water and ethanol extracts of TM were measured for total flavonoids content, total phenolics content, electron donating ability, nitrite-scavenging ability, SOD-like activity, tyrosinase inhibitory effect, and elastase inhibitory effect. Total flavonoids contents of hot water and ethanol extracts from TM were 7.80$\pm$0.97 mg/g and 9.12$\pm$0.51 mg/g, respectively, and total phenolics contents were estimated as 54.20$\pm$1.95 mg/g for water extract and 79.43$\pm$4.44 mg/g for ethanol extract. The $RC_{50}$ values for electron donating ability of hot water and ethanol extracts were 943.98 $\mu$g/mL and 309.41 $\mu$g/mL. SOD-like activity and nitrite-scavenging ability were dependent on concentration of hot water and ethanol extracts, and the activity of ethanol extract was higher than that of hot water extract. However, hot water and ethanol extracts from TM showed no inhibitory activities on the elastase and tyrosinase inhibitory activities. Based on the above results, the ethanol extract of TM seems to be the most pertinent for use as functional food and cosmetic.

포공영의 총 페놀함량에서는 열수 추출물 7.80$\pm$0.97 mg/g, 에탄올 추출물 9.12$\pm$0.51 mg/g으로 나타났다. 플라보노이드함량은 열수 추출물 54.20$\pm$1.95 mg/g, 에탄올 추출물 79.43$\pm$4.44 mg/g으로 항산화 활성에 관련된 페놀 및 플라보노이드 화합물들이 에탄올 추출물에 많이 존재함을 확인할 수 있었다. 전자공여능에 있어서도 포공영 에탄올 추출물이 열수 추출물 $IC_{50}$값에 비해 3배 정도의 뛰어난 활성을 보였다. 아질산염 소거능은 모든 pH 조건하에서 에탄올 추출물이 열수 추출물보다 높은 아질산염 소거능을 나타내었으며, pH가 증가할수록 감소하였다. SOD 유사활성을 측정한 결과 열수 추출물에서는 18.34$\sim$37.26 $\mu$g/mL, 에탄올 추출물에서는 16.60$\sim$49.03 $\mu$g/mL의 범위로 분석되었으며, 농도에 따른 유의적 증가현상을 나타내었다. Tyrosinase 및 elastase 저해활성은 모든 추출물에서 대조구에 비해 다소 약한 활성을 나타내었다. 포공영 추출물은 뛰어난 항산화 활성을 나타나 기능성 식품 및 화장품 소재로 개발 가능성이 높을 것으로 사료된다.

Keywords

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