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Effects of Dendropanax morbifera Leaf Extracts on Lipid Profiles in Mice Fed a High-Fat and High-Cholesterol Diet

황칠나무 잎 추출물이 고지방·고콜레스테롤 식이를 급여한 마우스의 지질 개선 효과에 미치는 영향

  • Tan, Xiaotong (Department of Food Science and Nutrition, Pusan National University) ;
  • Ryu, Ho Kyung (Department of Food Science and Nutrition, Pusan National University)
  • 담효동 (부산대학교 식품영양학과) ;
  • 류호경 (부산대학교 식품영양학과)
  • Received : 2014.12.04
  • Accepted : 2015.03.03
  • Published : 2015.05.31

Abstract

The purpose of this study was to determine the effects of dried Dendropanax morbifera leaf extracts on lipid profiles of mice fed a high-fat and -cholesterol diet (HFCD). ICR mice were divided into six groups based on mice fed AIN-93G diet (Normal), HFCD (Control), HFCD+100 mg/kg/d of D. morbifera leaf aqueous extract (DA-100), HFCD+200 mg/kg/d of D. morbifera leaf aqueous extract (DA-200), HFCD+100 mg/kg/d of D. morbifera leaf ethanol extract (DE-100), or HFCD+200 mg/kg/d of D. morbifera leaf ethanol extract (DE-200) for 7 weeks. The final body weights of mice fed D. morbifera extracts were all lower than those of the control group. Mice treated with D. morbifera extracts showed significantly reduced plasma and hepatic triglyceride (TG), total cholesterol (TC), and low-density lipoprotein cholesterol levels, along with increased plasma high-density lipoprotein cholesterol level. Fecal TG level was higher in DE-100 and DE-200 groups and TC level was significantly higher in the DA-200 and DE-200 groups. Relative liver weight, spleen weight, and testicle fat weight in mice treated with D. morbifera were reduced compared to the control group. Plasma insulin, aspartate transaminase, and alanine transaminase levels of experimental groups were also lower than those of the control group. All mice treated with D. morbifera extracts had lower malondialdehyde (MDA) content and higher superoxide dismutase (SOD) activity than the control group. Particularly MDA levels of the DA-200 and DE-200 groups and SOD levels of the DE-200 group were identical to levels of the normal group. These results suggest that D. morbifera extracts have lipid improvement effects in mice fed a HFCD.

고지방 고콜레스테롤 식이를 급여한 마우스에서 황칠나무 잎 추출물이 체내 지질 상태에 미치는 영향을 보기 위해 본 실험을 실시하였다. 실험 결과 황칠나무 추출물을 투여한 마우스의 체중이 모두 control군에 비해 감소하였다. 혈장과 간장의 TG, TC 및 혈장 LDL-C 농도도 control군에 비해 유의적으로(P<0.05) 감소하였으며, 혈장 HDL-C의 농도는 control군이 normal군보다 유의적으로 낮아졌고 DA-200군, DE-200군은 normal군의 수준까지 증가하였다(P<0.05). 간장, 비장, 고환 지방의 상대 무게와 혈장 인슐린 농도는 normal군에 비해 control군이 매우 높았으나 황칠나무 잎 추출물을 투여했을 때는 추출방법에 상관없이 농도에 비례적으로 인슐린 농도가 감소되었다. 그리고 모든 황칠나무 투여군의 간 조직 AST, ALT 활성과 MDA 농도 및 SOD 활성도 변화되었는데 AST, ALT 활성과 MDA 농도는 control군에 비해 낮아졌고 SOD 활성은 control군에 비해 증가하였다(P<0.05). 특히 DE-200군의 ALT 활성 및 DA-200군, DE-200군의 MDA 농도가 normal군의 수준까지 감소되었다(P<0.05). 또한 hematoxylin과 eosin 염색을 통해 황칠나무 잎 추출물이 간세포의 지질 침착 정도를 개선하는 것을 확인하였다. 이상의 결과를 통해 황칠나무 잎 추출물은 추출용매와 추출물의 농도에 따라 약간의 차이는 있으나 모두 고지방 고콜레스테롤 식이를 급여한 마우스의 체내 지질 상태의 개선에 영향을 미치는 것으로 확인되었다.

Keywords

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