Journal of the Korean Society of Food Science and Nutrition (한국식품영양과학회지)

The Korean Society of Food Science and Nutrition (한국식품영양과학회)
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Effect of Young Phragmites communis Leaves Powder on Lipid Metabolism and Erythrocyte Antioxidant Enzyme Activities in High-Fat Diet Fed Mice

갈대순분말이 고지방을 급여한 마우스의 지질대사 및 적혈구 항산화방어계에 미치는 영향

  • Lee, Jin (Dept. of Food and Nutrition, Sunchon National University) ;
  • Jeong, Joo-Yong (Dept. of Nutrition Education, Graduate School of Education, Sunchon National University) ;
  • Cho, Young-Sook (Dept. of Food and Nutrition, Sunchon National University) ;
  • Park, Seok-Kyu (Dept. of Food and Nutrition, Sunchon National University) ;
  • Kim, Kwang-Jin (Gardaenara Agricultural Co. Ltd., Sunchon National University) ;
  • Kim, Myung-Joo (Faculty of Hotel Cuisine, Daegu Polytechnic College) ;
  • Lee, Mi-Kyung (Dept. of Food and Nutrition, Sunchon National University)
  • 이진 (순천대학교 식품영양학과) ;
  • 정주영 (순천대학교 교육대학원 영양교육) ;
  • 조영숙 (순천대학교 식품영양학과) ;
  • 박석규 (순천대학교 식품영양학과) ;
  • 김광진 ((주)갈대나라) ;
  • 김명주 (대구산업정보대학 호텔조리계열) ;
  • 이미경 (순천대학교 식품영양학과)
  • Received : 2010.01.26
  • Accepted : 2010.03.18
  • Published : 2010.05.31
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Abstract

This study investigated the effect of young Phragmites communis (Pc) leaves on lipid profiles, lipid metabolism and erythrocyte antioxidant defense system in high-fat diet fed mice. Three groups of mice were fed different diets for 8 weeks: normal diet (Normal), high-fat diet (High-fat; 37% calories from fat) and high-fat diet supplemented with 1% Pc (wt/wt, HF-Pc). Body weight, daily food intake and energy intake tended to decrease by Pc supplement in high-fat fed mice. Pc supplementation significantly lowered plasma triglyceride and total cholesterol concentrations compared to the high-fat control group. Pc also lowered hepatic and heart cholesterol contents, whereas it significantly increased fecal excretion of triglyceride and cholesterol compared to the high-fat control group. Pc significantly inhibited fatty acid synthase, 3-hydroxy-3-methylglutaryl CoA reductase and acyl-CoA:cholesterol acyltransferase activities compared to the high-fat control group. Erythrocyte superoxide dismutase and catalase activities were also significantly higher in the high-fat group than in the normal group, however Pc supplementation reversed these changes. The Pc supplementation significantly lowered erythrocyte lipid peroxidation level compared to the high-fat control group. Accordingly, these results suggest that Pc improves lipid metabolism and erythrocyte antioxidant defense system in high-fat diet fed mice.

본 연구는 고지방을 급여한 마우스의 체내 지질개선 및 항산화 방어계에 미치는 갈대순의 영향을 구명하고자 하였다. 4주령의 ICR마우스(n=24)를 1주일간 적응시킨 후 정상식이를 급여한 정상군, 고지방을 급여한 고지방군, 고지방-갈대순분말 급여군으로 나누어 8주간 사육하였다. 갈대순분말은 사람이 하루에 3잔의 차를 마시는 양을 고려하여 식이에 1% 수준이 되도록 첨가 조제하여 급여하였다. 갈대순분말군의 체중, 일일 식이섭취량과 에너지섭취량은 고지방군에 비하여 감소하는 경향이었다. 갈대순분말 급여 시 혈장의 총 콜레스테롤 함량은 고지방군에 비하여 19% 감소되었고 중성지질 함량은 36% 유의적인 감소를 보였다. 갈대순분말은 고지방식이로 축적된 간 조직의 중성지질 함량 변화에는 영향을 미치지 않았으나 콜레스테롤 함량은 고지방군에 비하여 유의적으로 낮추었다. 심장조직의 중성지질과 콜레스테롤 함량 역시 정상군에 비하여 고지방군이 각각 145%, 112%의 유의적인 증가를 나타내었으나 갈대순분말 급여로 중성지질 함량은 감소경향을 보였으며 콜레스테롤 함량은 정상군과 유사한 수준으로 개선되었다. 갈대순분말은 고지방군에 비하여 분변으로의 중성지질과 콜레스테롤 배설을 각각 27%와 28% 유의적으로 증가시켰다. 갈대순분말은 간 조직의 지방산 산화에는 영향을 미치지 않았고 지방산 합성효소 활성을 유의적으로 억제하였다. 간 조직 중의 HMG-CoA reductase와 ACAT 활성도 역시 갈대순급여군이 고지방군에 비하여 유의적으로 낮았다. 적혈구 중의 SOD와 CAT 활성은 정상군에 비하여 고지방식이 급여 시 유의적인 증가를 보였으나 GSH-Px 활성은 고지방식이로 인한 변화가 관찰되지 않았다. 반면, 갈대순분말 급여는 적혈구의 SOD와 CAT 활성과 지질과산화물 함량을 고지방군에 비하여 유의적으로 낮추었다. 이와 같이 갈대순분말은 고지방식 이를 급여한 마우스의 간 조직에서의 지방산과 콜레스테롤 합성을 저해하고 분변으로의 지질배설을 증가시킴으로써 혈장 지질개선에 효과적이었으며 적혈구의 항산화 효소활성도와 지질과산화물 함량도 개선하는 것으로 나타났다.

Keywords

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