Korean Journal of Food Science and Technology (한국식품과학회지)

Korean Society of Food Science and Technology (한국식품과학회)
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Effects of Unripe Black Raspberry Water Extract on Lipid Metabolism and Oxidative Stress in Mice

복분자 미숙과 물 추출물이 마우스의 지질대사 및 산화적 스트레스에 미치는 영향

  • Received : 2014.04.07
  • Accepted : 2014.05.17
  • Published : 2014.08.31
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Abstract

We examined the effects of unripe black raspberry water extract (UBR-W) on lipid metabolism and oxidative stress in mice. C57BL/6J mice were divided into 4 groups: those administered a control diet (CTL), high-fat diet (HFD), UBR-W and simvastatin for 12 weeks. In the HFD group, LDL cholesterol were significantly higher than in the CTL group. However, the UBR-W treated group showed dose-dependent reduction of plasma LDL levels. Hepatic total lipid, TC, and malondialdehyde were significantly increased in hyperlipidemic mice. However, supplementation with either UBR-W or simvastatin effectively reduced these lipid profiles and lipid peroxidation. UBR-W increased mRNA expression of the LDL receptor, sterol regulatory element binding protein 2 (SREBP2), 3-hydroxy-3-methylglutaryl (HMG)-CoA reductase and ATP-binding cassette transporter A1 (ABCA1) compared to that observed in the HFD group. In addition, UBR-W and simvastatin showed significantly reduced oxidized LDL uptake by the scavenger receptor CD36. These results suggest that UBR-W is useful for treatment and prevention of hyperlipidemia and lipid peroxidation.

본 연구는 복분자 미숙과 물 추출물이 in vivo에서 지질대사 및 산화적 스트레스에 미치는 영향을 살펴보고, 기능성 식품으로서의 가능성을 알아보기 위하여 수행되었다. 실험동물은 C57BL/6J mouse를 사용하였으며, 12주 동안 고지질 식이를 급이하면서, 복분자 미숙과 물 추출물을 경구 투여하여 다음과 같은 결과를 얻었다. 고지질대조군과 비교하였을 때, 복분자 미숙과 첨가군에서 체중증가량, 식이효율이 모두 감소되었고, 혈중 콜레스테롤 및 LDL-콜레스테롤의 농도를 유의성 있게 감소시켰을 뿐만 아니라 간 조직에서 총콜레스테롤의 함량이 유의적으로 감소됨을 확인하였다. 콜레스테롤 합성의 가장 중요한 기작인 LDL receptor와 SREBP2의 활성을 증가시킴으로써, 세포 안으로의 LDL 흡수를 촉진하였고, HMG-CoA reductase의 유전자 발현이 증가되면서 체내 콜레스테롤을 조절하며, ABCA1의 활성화로 인해, 콜레스테롤의 배출을 증가시키는 결과를 도출하였다. 또한, 간조직의 지질산화수준(TBARS)을 유의적으로 감소시켰으며, ox-LDL관련 유전자인 CD36을 억제함으로써, 동맥경화를 예방할 것으로 기대한다. 간의 형태학적 변화를 관찰해본 결과, 고지질대조군에 비하여 지방형성이 현저히 줄어들었음을 확인하였다. 결과적으로 복분자 미숙과 물 추출물이 콜레스테롤의 생합성과 배출 및 산화적 스트레스를 조절하여 고지질 및 동맥경화 질환 예방에 긍정적인 효과를 미치는 것으로 사료된다.

Keywords

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