Effects of Ethylacetate Fraction of Onion on Lipid Metabolism in High Cholesterol-Fed Rats

양파 에틸 아세테이트 분획이 고콜레스테롤식이를 섭취한 흰쥐의 지질대사에 미치는 영향

  • Published : 2001.08.01

Abstract

To investigate effects of ethylacetate fraction of onion(EFO) on serum lipid metabolism in rats fed high cholesterol diet, four groups of Sprague-Dawley male rats weighing about 100 g were given a high cholesterol diet of 1% cholesterol and 0.25% sodium cholate and EFO containing three concentrations (1%, 3% and 10%), respectively for 6 weeks. growth rate of the hypercholesterolemic group (control group) was higher than the normal group, whereas the groups given EFO showed a decreasing trends, compared with the control group, especially the most excellent effect in 10% of EFO, but any differences were not found between groups in feed efficiency ratio. Serum concentrations of total cholesterol and LDL-cholesterol were lower, whereas HDL-cholesterol concentration was significantly higher in EFO suplemented-grups than control group in dose dependent manner. EFO increased HDL-cholesterol/total cholesterol ratio and lowered atherogenic index. Free cholesterol and triglyceride concentrations were not decreased significantly with in 6 weeks, but cholesteryl ester concentration was significantly decreased in EFO suplemented groups than control group, and in case of serum phospholipid concentration, EFO was not showed significantly effect, but it gradually increased the level, compared with the control group. Therefore, it might be expected that ethylacetate fraction of onion is believed to be a possible protective or curative effects for the fatty liver and hyperlipidemia-induced by a high cholesterol diet.

1% 콜레스테롤과 0.25% 콜산나트륨을 첨가한 고콜레스테롤혈증 유발식이와 양파 에틸아세테이트 분획농도 수준을 달리하여 6주간 흰쥐에 급여하여 고콜레스텐롤혈증에 미치는 영향을 실험하였다. 고콜레스테롤식이만을 급여한 군은 대조군에 비하여 높은 체중증가율을 나타냈으나 양파 에틸아세티이트 분획 급여시 대조군에 비하여 감소의 경향을 보였는데, 특히 10% 급여군은 대조군에 비하여 체중증가율이 유의성있게 둔화되었으나 식이효율에는 유의적인 차이가 관찰되지 않았다. 신장과 심장의 중량에는 양파 에틸아세테이트분획 급여가 별다른 영향을 미치지 않았으나, 간장의 중량에서는 양파 에틸아세테이트 분획 급여 전군이 대조군에 비하여 유의성있게 중량이 감소되었다. 혈청 중의 총콜레스테롤, LDL-콜레스테롤은 양파음료급여군이 고콜레스테롤식이만을 급여한 군에 비하여 용략의존적으로 감소 T고 HDL-콜레스테롤은 증가되었는데, 특히 10% 급여군은 고콜레스테롤식이만을 급여한 군에 비하여 약 71%, 정상군에 비하여 약 30%이상 큰 폭의 증가효과를 나타내었다. 또한 HDL-콜레스테롤/LDL-콜레스테롤의 비율도 많이 증가되었고 동맥경화지수도 감소되었는데 특히 10% 급여의 경우 정상군의 지수보다도 낮은 결과를 나타내므로서 고콜레스테롤혈증 개선효과가 뚜렷한 것으로 사료된다. 유리 콜레스테롤 및 중성 지질함량에는 양파 에틸아세테이트 분획 급여가 대조군에 비하여 6주간의 급여기간내에서는 감소효과를 보이지 않았으나, 콜레스테롤 에스테르함량은 큰 폭으로 감소되었고 인지질의 경우 유의적이지는 않았으나 증가되는 경향을 나타냄으로서 지방간 진행을 억제할 수 있을 것으로 여겨진다. 이상의 실험결과에서 양파 에틸아세테이트 분획 급여시 고콜레스테롤식이만을 급여한 군에 비하여 간장의 중량, 총콜레스테롤, LDL-콜레스테롤농도 및 중성지질농도 등은 감소되었고, HDL-콜레스테롤, 인지질농도 등은 증가되므로써 양파 음료가 지방간 및 동맥경화의 예방과 치료에 효과적일 것으로 사료된다.로 사료된다.

Keywords

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