合成油的营养评价——(二)合成油饲料对实验性高胆固醇血症大鼠体重、血脂和肝脂成分的影响

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在88g基础饲料中加入12g不同种类的油脂(合成油、猪油和豆油)和1%胆固醇喂养大鼠5周以诱导动物产生高脂血症,并以不加入胆固醇的豆油饲料作为正常对照。比较各组动物在实验期内的生长、血清脂质、肝脏脂质和某些内脏器官重量的改变。结果如下: (1)大鼠摄食含不同油脂的致高胆固醇血症饲料5周后,各组雄鼠的体重增加无明显的不同,雌鼠的体重增加则有显著的差别,即合成油组动物的增重显著较猪油组和对照组的为低。 (2)在各种油脂饲料中加入胆固醇都可使动物的肝重增大。猪油组和豆油组动物的肝脏有明显的脂肪肝病变。肝脂含量增加,肝胆固醇和甘油三酯大量积存(分别约为对照组的9-10倍和2-3倍)。而合成油组动物的肝脏外观表现正常,肝脂含量、肝胆固醇和甘油三酯水平则接近对照组的正常水平。 (3)在各种油脂饲料中加入胆固醇喂养大鼠,对雄鼠血清胆固醇水平的影响不明显,但引起雌鼠血清胆固醇的改变和对照组比较,猪油饲料使动物的血清胆固醇含量明显增高,豆 油和合成油饲料则可维持动物的血胆固醇含量于正常水平。血清甘油三酯水平则以合成油饲料组动物的为最高。 (4)在各种饲料中加入胆固醇除增大肝脏重量外,也使雌鼠的主动脉重量增高,但饲料油脂种类对其重量的影响不明显。 上述结果表明,当饲料中含有高水? 12 g of different kinds of fats (synthetic oil, lard and soybean oil) and 1% cholesterol were added to 88 g of basal diet for 5 weeks to induce hyperlipidemia in animals and soybean oil-free diet without cholesterol was used as a normal control. The growth of each group of animals in the experimental period, serum lipid, liver lipid and some visceral organ weight changes. The results are as follows: (1) After 5 weeks of feeding rats with hypercholesterolemia containing different oils, there was no significant difference in body weight gain between the male rats and female rats. There was a significant difference between the weight gain of the female rats Animal weight gain was significantly lower than lard and control. (2) Adding cholesterol to all kinds of greasy fodder can increase the liver weight of animals. Lard oil group and soybean oil group of animals have obvious fatty liver disease. Hepatic fat content increased, a large number of hepatic cholesterol and triglyceride accumulation (respectively about 9-10 times and 2-3 times the control group). However, the appearance of liver in synthetic oil group was normal, and the levels of hepatic lipid, hepatic cholesterol and triglyceride were close to the normal levels in the control group. (3) Cholesterol-fed rats fed various kinds of greasy fodder had no obvious effect on the level of serum cholesterol in males but caused the change of serum cholesterol in females. Compared with the control group, lard feed significantly increased serum cholesterol , Soybean oil and synthetic feed can maintain the animal’s blood cholesterol levels at normal levels. Serum triglyceride levels were highest in synthetic oil-fed animals. (4) In addition to increasing cholesterol in various feedstuffs, in addition to increasing the weight of the liver, the weight of the aorta of female rats also increased, but the type of feed fat had no obvious effect on its weight. The above results show that when the feed contains high water?
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