Korean Journal of Food Science and Technology (한국식품과학회지)

Korean Society of Food Science and Technology (한국식품과학회)
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The Effect of Rice with Aspergillus terreus on Lipid Metabolism in Rats

황국곡자 투여가 지방질 대사에 미치는 영향

  • Received : 2015.04.16
  • Accepted : 2015.08.05
  • Published : 2015.10.31
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Abstract

The aim of this study was to investigate the effects of rice contatining Aspergillus terreus (Hwangkuk, HK) on lipid metabolism in male Sprague-Dawley (SD) rats fed a high-cholesterol diet (HCD) for 8 weeks. SD rats were divided into five groups: Normal, [Negative Control (HCD), Positive Control (lovastatin)], [HK 0.5 g/kg and HK 2 g/kg]. Hepatic total lipids significantly decreased following treatment with rice contatining Asp. terreus. Furthermore, this treatment led to higher expression levels of HMG-CoA reductase, LDL receptor and SREBP2 mRNA in the liver compared with the HCD group. In addition, histopathologic evaluation showed that feeding rats with rice containing Asp. terreus suppressed hepatic steatosis. These results suggest that rice containing Asp. terreus may be able to regulate of cholesterol synthesis and prevent hyperlipidemia.

본 연구에서는 Asp. terreus를 접종하여 제조한 황국곡자를 이용하여 지질대사와 관련 조절유전자 및 심혈관질환에 미치는 효능을 확인하고, 고지혈증 개선에 미치는 황국곡자의 효능을 검증하고자 하였다. SD rat을 사용하여 8주 동안 고콜레스테롤 식이와 황국곡자 0.5, 2 g을 경구투여 하였다. 그 결과 간조직에서 황국곡자 투여군은 총 지질의 함량이 감소하였으나 황국곡자가 콜레스테롤 배출에는 크게 영향을 주지 않음을 확인하였다. 간조직 내 LDL 및 HDL 관련 유전자 발현 확인 결과, 콜레스테롤 합성의 가장 중요한 기작인 HMG-CoA reductase, LDL receptor와 SREBP2 발현에서는 고콜레스테롤군보다 유의적으로 모두 증가하여 체내의 콜레스테롤을 낮추는 것으로 판단된다. 또한 간조직의 형태학적 특징을 관찰해본 결과 황국곡자 투여군이 고콜레스테롤군에 비해 간 손상의 정도가 현저히 감소되어 있으며 간세포 내 작은 공포 모양의 지방구가 현저히 줄어들어 있는 것을 확인하였으며 황국곡자를 투여한 군 모두 지방세포 침윤과 같은 지방간 병변의 치료효과를 확인하였다. 결과적으로 황국곡자는 체내의 지질대사에 영향을 끼침에 따라 고지혈증의 개선을 위한 소재로 이용될 수 있을 것으로 판단된다.

Keywords

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