Abstract
The long-term effects of vegetable and animal high fat diet on the lipid metabolism were investigated in male weaning rats. The rats were fed one of four semipurified diet ad libitum : control diet supplied 12% of calories as fat(control group), low fat diet supplied 3% of calories as fat (3% F group), 45% corn oil diet supplied 45% calories from corn oil (45% C group) and 45% butte. fat diet supplied 45% calories from butter fat (45 % B group). Incorporation of $acetate-1-^{14}C$ into lipid of liver, serum and adipose tissue as well as exhalation of $^{14}CO_{2}$ from $acetate-1-^{14}C$ were observed in rats fed for 4,8 and 12 weeks. The weigh of epididymal adipose tissue of rats, fed 45% corn oil and 45% butter fat . from 4 weeks to 8 weeks were higher, but not different at 12 weeks, compared with those of control group. The weight of abdominal adipose tissue appeared to be similar to those of epididymal adipose tissue. Incorporations of $acetate-1-^{14}C$ into lipid of liver were remarkably decreased in high fat diet groups, especially in 45% C group, but in 3% F group were increased more than those of control group. Incorporations of $acetate-1-^{14}C$ into epididymal adipose tissue in 3% F, 45% C and 45% B group at 8 weeks were remarkably increased but not different at 12 weeks, compared with those of control group. The incorporation of {acetate-1-}^{14}C into abdominal adipose tissue appeared to be similar to those of epididymal adipose tissue. Incorporations of $acetate-1-^{14}C$ into lipid of serum in 45% C and 45% B group were reduced reasonably at 4 and 8 weeks of diet as compared with those of control group. Exhalation of $^{14}CO_{2}$ was increased to maximum level at 10 minutes after injection of $acetate-1-^{14}C$. Expiration of $^{14}CO_{2}$ in 45% C and 45% B group were higher than those in 3% F and control group for initial 5 minutes after injection, but expirations of $^{14}CO_{2}$ did not have significant difference among groups of diet since 10 minutes.
식물생고지방식이(植物牲高脂肪食餌) (45%-corn oil 식이(食餌) : 45%C군(群))및 동물생고지방식이(動物牲高脂肪食餌)(45%-butter fat 식이(食餌) : 45%B군(群)) 와 저지방식이(低脂肪食餌) ( 3%-fat식이(食餌): 3%F군(群))를 자유섭식(自由攝食)으로, 사육(飼育)하면서 4, 8 및 12주에 각각 쥐를 사용하여 $acetate-1-^{14}C$를 주입(注入)한 후 간장(肝臟), 혈청(血淸) 및 지방조직(脂肪組織)등의 지질(脂質)에의 편입도(編入度)와 주입(注入)된 $acetate-1-^{14}C$이 호기(呼氣) 중(中)$^{14}CO_{2}$로의 배출(排出)등을 측정한 결과는 다음과 같다. 부고환지방조직중량(副睾丸脂肪組織重量)은 실험 4,8주에 45%C군(群) 및 45%B군(群)이 대조군에 비해 컸으나 12주에 와서는 차이가 없었다. 복부지방조직(腹部脂肪組織) 중량(重量)도 역시 부고환지방조직(副睾丸脂肪組織)과 비슷한 경향이었다. $Acetate-1-^{14}C$의 간지질(肝脂質)에의 편입도(編入度)를 보면 45 % C군(群) 및 45%B군(群)은 실험(實驗) 전기간(全期間) 동안 대조군 및 3%F군(群)에 비해 현저하게 낮았으며, 그중에서도 45%C군(群)이 더 현저하였다. 그러나 3%F군(群)은 대조군에 비해 높았다. 부고환지방조직(副睾丸脂肪組織)에서의 $acetate-1-^{14}C$의 편입도(編入度)는 실험 8주에 모든 군(群)이 4, 12주 때보다 현저히 높았고, 또 3군(群) 모두 대조군보다 유의적으로 높았다. 복부지방조직(腹部脂肪組織) 역시 부고환지방조직(副睾丸脂肪組織)에서의 편입도(編入度)와 비슷한 경향이었다.$Acetate-1-^{14}C$의 혈청지질(血淸脂質)에 의 편입도(編入度)는 실험 4, 8주에는 대조군에 비해 45%C군(群) 및 45%B군(群)이 현저히 낮았다. $Acetate-1-^{14}C$의 호기중(呼氣中)의 $^{14}CO_{2}$로의 배출(排出)을 $acetate-1-^{14}C$ 주입(注入)후 180분 동안 관찰한 결과 각군(各群) 공(共)히 5내지 10분 동안 최고치(最高値)에 달하였으며, 30분 이후부터는 급속히 감소하였다. 그리고 처음 5분간(分間)은 45% C군(群) 및 45%B군(群)이 대조군과 3%F군(群)에 비해 유의적으로 높았다.