Effects of Dietary P/S Ratio on Lipid Content of Plasma and Tissues in Rats

식이 지방의 P/S비율이 흰쥐의 혈장 및 조직의 지질함량에 미치는 영향

This study was designed to observe the effects of dietary P/S ratio on lipid component in plasma and tissues. Changes in plasma total cholesterol and triglyceride concentration and also cholesterol and triglyceride concentrations in liver, small intestine and aorta were determined in adult rats fed experimental diets providing different dietary P/S ratios as 0.05, 0.5, 1.0, 2.0, 3.0, and 4.0, respectively. The results obtained were summarized as follows; 1. Feed efficiency ratio was not significantly different among six groups at 2nd week. But at 4th week, the higher the dietary P/S ratio the higher the feed efficiency ratio. 2. Plasma cholesterol level was getting higher as increased dietary P/S ratio at 2nd week, But that was significantly decreased as P/S ratio increased at 4th week. 3. Plasma triglyceride level was significantly decreased as increased dietary P/S ratio at 4th week. 4. Cholesterol concentrations in liver and small intestines were getting higher as increased dietary P/S ratio at 4th week, But aortas cholesterol concentration was not influenced by P/S ratio. 5. Triglyceride concentrations in liver and small intestines were significantly increased as increased dietary P/S ratio. On the contrary, triglyceride concentration in aortas was not influenced by P/S ratio.

식이 지방의 P/S비율을 0.05, 0.5, 1.0, 2.0, 3.0, 4.0으로 조절한 실험식이로 Wistar계 흰쥐를 사육하면서 급식 2주 및 4주에 혈장 총 콜레스테롤과 중성지방 함량, 간, 소장 및 동맥의 콜레스테롤과 중성지방 함량을 측정하여 식이지방의 P/S비율이 체내 지방대사에 미치는 영향을 검토한 바 다음과 같은 결과를 얻었다. 1. 식이효율은 2주 급식시에는 여섯 실험군간에 차이가 없었으나 4주 급식시에는 P/S 비율이 높을수록 높은 경향을 나타내었다. 2. 혈장의 총 콜레스테롤 함량은 P/S비율이 높아감에 따라 2주 급식시에는 증가하는 경향을 보였으나, 4주 급식시에는 유의하게 감소하였다. (p＜0.05) 3. 혈장의 중성지방 함량은 4주 급식시 P/S비율이 높을수록 유의하게 감소하였다.(p＜0.05) 4. 간 및 소장의 콜레스테롤 함량은 4주 급식시 P/S비율이 높아감에 따라 증가하였다. 그러나 동맥의 콜레스테롤 함량은 P/S 비율의 변화에 따른 영향을 보이지 않았다. 5. 간 및 소장의 중성지방 함량은 P/S비율이 높아감에 따라 현저하게 증가하였으나(p＜0.05), 동맥의 중성지방 함량은 P/S비율의 변화에 따른 영향이 뚜렷하지 않았다.