Korean Journal of Food Science and Technology (한국식품과학회지)

Korean Society of Food Science and Technology (한국식품과학회)
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Antioxidant and Anti-inflammatory Activities of Water-soluble Extracts from Different Parts of Kojongsi Persimmon (Diospyros kaki L.)

고종시 감나무 부위별 수용성 추출물의 항산화 및 항염 활성

  • Received : 2014.04.19
  • Accepted : 2014.06.21
  • Published : 2014.08.31
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Abstract

Kojongsi persimmon (Diospyros kaki L.) is the major cultivar of dried persimmon in Korea. The purpose of this study was to investigate the antioxidant and anti-inflammatory activities of water-soluble extracts from the calyx (PCE), peel (PPE) and leaf (PLE) of Kojongsi persimmon. PCE showed the highest total phenolic and flavonoid contents. In addition, the antioxidant activities (diphenylpicrylhydrazyl, 2,2'-azino-bis(3-ethylbenzthiazoline-6-sulfonic acid), nitric oxide and reducing power) of PCE were higher than those of PPE and PLE. Moreover, PCE, PPE and PLE significantly suppressed the production of inflammatory mediators (nitric oxide and $prostaglandinE_2$) and pro-inflammatory cytokines (tumor necrosis factor-${\alpha}$ and interluekin-$1{\beta}$) by lipopolysaccharide-stimulated RAW 264.7 cells in a dose-dependent manner. PCE showed the highest anti-inflammatory activity. Thus, these results suggest that the calyx of Kojongsi persimmon may be highly valuable as a natural product owing to its high-quality functional components as well as its-antioxidant, ant-iinflammatory activities.

본 연구는 고종시 감나무 부위별 수용성 추출물의 항산화 및 항염증에 대한 효과를 조사하였다. 감꼭지와 감잎은 DPPH, ABTS 및 NO 등 라디칼을 효과적으로 제거하는 활성뿐만 아니라 환원력도 우수한 항산화 활성을 보였다. 또한 LPS에 의해 활성화된 설치류 유래 대식세포주인 RAW 264.7 세포에서 NO 생성억제는 감꼭지 추출물이 가장 우수하였지만, $PGE_2$ 생성의 경우 모든 부위의 추출물에서 탁월한 억제 효과가 있었다. 더욱이 활성화된 RAW 264.7 세포에서 감꼭지, 감잎 및 감껍질 추출물은 농도에 의존적으로 TNF-${\alpha}$와 IL-$1{\beta}$를 효과적으로 억제하였다. 이러한 결과는 고종시 감나무 부위별 추출물 중 감꼭지와 감잎은 항산화제뿐만 아니라 항염증에 효과적인 물질이라는 것을 제시해주었고, 감껍질의 경우 비록 항산화 효과는 낮았지만, 우수한 항염효과를 나타내는 물질임을 제시해주었다. 그러므로 고종시 감나무 수용성 추출물은 항산화와 항염 기능을 발휘할 수 있는 식품으로 활용될 수 있을 것이라 사료된다.

Keywords

References

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