Effect of Gastrodiae rhizoma Fractions on Serum Lipid Concentrations in Rats Fed with High Fat Diet

천마 분획물이 고지방식이를 급여한 흰쥐의 혈청 지질농도에 미치는 영향

  • Published : 2005.12.31

Abstract

This study was carried out to investigate the effect of Gastrodiae rhizoma fractions on serum lipid profiles and atherogenic index (AI) in male S.D. rats fed a high fat diet supplemented with 10 : 2 : 1% (w/w) of lard, corn oil, and cholesterol during the entire 12-week experimental period. Forty-eight rats were randomly divided into four groups; A (low molecule), B (polysaccharide), C (protein) fractions of Gastrodiae rhizoma, respectively, and D (high fat diet as control). Body weight gain, diet intake and feed efficiency ratio did not differ significantly among the groups during the experimental period, but final body weight was on the average 44 g higher in control compared with the three groups of Gastrodiae rhizoma $(A{\sim}C)$. TC and TG levels of group B when compared with control were each decreased by an average of 21.5% and 39.6%, respectively. HDL-cholesterol level was markedly higher in group C than group A and B of Gastrodiae rhizoma. LDL-cholesterol levels of Gastrodiae rhizoma groups $(A{\sim}C)$ were significantly lower than control. AI was significantly lower in group C at 1.45 than the other two Gastrodiae rhizoma at $1.94{\sim}2.05$ and control of 2.12. From the findings, it is feasible for water soluble and high molecular weight components of Gastrodiae rhizoma like polysacchride and protein fractions to be considered as functional components for improving hyperlipidemia.

건강식품소재로서 천마의 효능과 활용방안을 모색하고자 고지방식이를 급여한 흰쥐에게 천마성분 분획물이 혈청 지질함량과 동맥경화유발지수 등에 미치는 영향을 조사하였다. 시험기간은 총 12주간으로 실험 1기는 초기 6주 동안 흰쥐사료에 유지를 첨가한 고지방식이(HFCD)를 급여하였고, 실험 2기는 6주 동안 천마성분 분획물을 함께 투여하였다. 천마성분 분획물로는 에탄올 가용성인 저분자분획(MW<1K, GR-1), 수용성 획분에 pronase처리한 다당체분획(GR-2), periodate를 이용한 다당체산화를 통하여 단백질분획(GR-3)을 조제하여 사용하였다. 시험 종료체중은 고지방대조군이 천마분획물군 보다 평균 44 g 정도 높았지만 통계적인 차이는 없었으며 증체량, 식이섭취량 및 식이효율(FER) 역시 유의적인 차이가 없었다. 실험 2기 종료후 측정한 혈청 지질중 TC와 TG농도는 다당체 분획을 투여한 경우에 고지방대조군에 비해 각각 21.5, 39.6% 낮았다. HDL콜레스테롤은 단백질분획이 저분자분획과 다당체분획 보다 높았고, LDL콜레스테롤은 천마분획물 투여군에서 고지방대조군 보다 유의하게 낮았다. 동맥경화위험지수는 단백질분획이 1.45로 다른 천마성분 분획물들의 $1.94{\sim}2.05$, 대조군의 2.12에 비해 가장 낮았다. 따라서 천마 다당체 또는 단백질분획 같은 수용성 고분자분획은 혈중 지질함량 및 조성을 개선시킬 수 있는 기능성 식품소재로 활용될 수 있을 것으로 사료된다.

Keywords

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