Korean Journal of Food Science and Technology (한국식품과학회지)

Korean Society of Food Science and Technology (한국식품과학회)
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Improvement of Anti-Inflammation Activity of Gardeniae fructus Extract by the Treatment of β-Glucosidase

β-Glucosidase 처리에 의한 치자추출물의 항염증 활성 증진

  • Received : 2011.12.25
  • Accepted : 2012.04.01
  • Published : 2012.06.30
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Abstract

In this study, we selected Gardeniae fructus (GF) as an anti-inflammatory functional material and improved the biological activity of GF through the treatment of ${\beta}$-glucosidase. For the simple evaluation of anti-inflammatory activity, the inhibitory activity of GF extract (GFE) on the production of NO by RAW264.7 cells in the presence of LPS was examined. ${\beta}$-glucosidase originating from Aspergillus niger or Aspergillus fumigatus has effectively improved the anti-inflammatory activity of GFE. The enzyme treatment raised the activity of GFE by more than 10 times. The optimum conditions for the enzyme reaction were at pH 4.6, $45^{\circ}C$, and 20 U/mL for 24 h with agitation. In addition, in vitro production of cytokines (IL-$1{\beta}$, IL-6, TNF-${\alpha}$), COX-2, and the NF-${\kappa}B$ activation of RAW264.7 cells decreased more in the presence of GFE treated with ${\beta}$-glucosidase originating from Aspergillus niger (GFAN) than in the presence of GFE. These results suggest that enzyme-treated GFE might be a potential candidate for natural anti-inflammatory food materials.

본 연구에서는, 치자 열매를 항염증 소재로 선택하여, 치자 추출물(GFE)에 ${\beta}$-glucosidase를 처리함으로써 항염증 활성을 증진하고자 하였다. 항염증 활성의 비교를 위해 추출물과 LPS를 함께 처리하여 RAW264.7 세포가 생산하는 NO의 양을 측정하였다. Lactic acid bacteria, 식물 그리고 곰팡이 유래 ${\beta}$-glucosidase를 처리한 결과, 곰팡이(A. niger, A. fumigatus)에서 유래된 효소를 처리하는 것이 GFE의 NO생산 억제활성 증진에 가장 효과적이었다. 그리고 GFE에 대한 A. niger 유래 ${\beta}$-glucosidase의 최적 처리조건은 pH 4.6, $45^{\circ}C$ 그리고 20 U/mL의 효소 농도로 24 h 반응시키는 것이었다. 이와 같은 조건으로 GFE에 효소를 처리한 GFAN은 GFE와 유사한 세포 생존율을 나타냈고, 세포독성은 나타나지 않았다. 또한 GFAN의 처리에 의하여 RAW264.7 세포의염증성 cytokine생산, COX-2생산 그리고 NF-${\kappa}B$활성이 현저히 줄어들었다. 본 연구에서 GFAN의 항염증 활성 증진은 치자의 성분 중 주로 geniposide가 ${\beta}$-glucosidase처리에 의하여 genipin으로 전환되었기 때문이라 생각된다. 이상의 결과는 ${\beta}$-glucosidase를 처리한 치자 추출물(GFE)을 이용하여 안전하고 효과적인 항염증 기능성 식품 소재 개발이 가능함을 제시하였다.

Keywords

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