Journal of the Korean Society of Food Science and Nutrition (한국식품영양과학회지)

The Korean Society of Food Science and Nutrition (한국식품영양과학회)
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Effect of Raw Broun Rice and Job식s Tear Supplemented Diet on Serum and Hepatic Lipid Concentrations, Antioxidative System, and Immune Function of Rats

현미 및 율무 함유 생식이 영양불균형이 유도된 흰쥐의 체내 지질농도, 항산화체계 및 면역기능에 미치는 영향

  • 박진영 (연세대학교 식품영양학과) ;
  • 양미자 (연세대학교 식품영양학과) ;
  • 전혜승 (연세대학교 식품영양학과) ;
  • 이진희 (제일제당주식회사 식품연구소) ;
  • 배희경 (제일제당주식회사 식품연구소) ;
  • 박태선 (연세대학교 식품영양학과)
  • Published : 2003.03.01
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Abstract

Physiological functions of raw grain diet composed of brown rice and Job's Tear (1 : 1) were evaluated in rats raised with nutritionally unbalanced diet including 1% cholesterol, high proportion of animal lipids (lard: soybean oil : 8 : 2), sub-optimal levels of vitamin and mineral mixture along with 0.5% ethanol in drinking water for 4 weeks. Control rats were fed the AIN-93G diet for 9 weeks, and nutritionally unbalanced rats were divided into 3 groups, and fed one of the following diets with 0.5% ethanol in drinking water for another 5 weeks: unbalanced control diet (UCD), raw grain diet (RGD) (UCD +20% brown rice and Job's Tear mixture, and cooked grain diet (CGD)(autoclaved RGD at 121$^{\circ}C$ for 3 hours). Feeding UCD for 5 weeks significantly lowered the food efficiency ratio (FER) of rats than the value for control animals, and dietary supplementation of brown rice and Job's Tear mixture to UCD significantly restored the FER. Serum total cholesterol concentration was significantly lowered in rats fed RGD (24% decrease) or CGD (16% decrease) compared to the value for rats fed UCD. Feeding RGD for 5 weeks significaly lowered the serum LDL+VLDL-cholesterol concentration (26% decrease), as well as the hepatic cholesterol level (16% decrease) than the values for UCD rats. Animals fed CGD (38% decrease) or RGU (59% decrease) showed significantly lower level of hepatic thiobarbituric acid reactive substances (TBARS) compared to the value for rats fed UCD (p<0.05), although hepatic activities of antioxidative enzymes were not influenced by dietary supplementation. Feeding RGD for 5 weeks significantly increased CD4$^{＋}$ T-cell population along with CD4$^{＋}$/CD8$^{＋}$ ratio of mesenteric lymph nodes compared to those for UCD rats (p<0.05). In conclusion, dietary supplementation of brown rice and Job's Tear mixture as raw grains exhibited superior activity lowering blood and hepatic levels of cholesterol, and improving mesenteric lymph nodes immune function of rats to the cooked grain mixture of identical ingredients.

본 연구에서 는 sub-optimal 수준의 비타민과 무기질을 섭취하며, 고콜레스테롤 식이에 알코올 섭취를 병행하여 영양 불균형이 유도된 흰쥐를 대상으로 현미와 율무로 구성된 생식 또는 열처리생식을 식이에 첨가하여 5주간 사육시킨 후 체내 지질농도, 항산화체계 및 면역기능에 미치는 영향을 평가하여 다음과 같은 결과를 얻었다. 영양불균형대조군의 식이효율은 일반대조군에 비해 더 낮았고, 현미 및 율무 함유생식 또는 열처리생식을 첨가한 결과 영양불균형대조군에 비해 식이효율이 유의적으로 증가하였다(p<0.05).혈청 총콜레스테롤 농도는 일반생식군 또는 열처리생식군에서 영양불균형대조군에 비 해 각각 24% 또는 16% 유의적으로 감소하였고(p<0.05) LUL+VLDL-콜레스테롤 농도 역시 일반생식군에서 영양불균형대조군에 비해 26% 유의적으로 감소하였으나(p<0.05), atherogenic index에는 유의적인 차이가 없었다. 일반생식군의 간조직 콜레스테롤 농도는 영양불균형대조군에 비해 16% 유의적으로 감소하였다(p<0.05). 간조직의 지질과산화물 농도는 일반생식군 또는 열처리 생식 군에서 영양불균형대조군에 비해 각각 38%또는 59% 유의적으로 감소하였다(p<0.05). 한편, 영양불균형대조식이에 일반생식 또는 열처리생식을 첨가한 결과 간조직의 항산화효소계 활성에 유의적인 영향을 미치지 못하였다 장간막임파절의 CD4$^{＋}$T-세포 분포 및 CD4$^{＋}$/CD8$^{＋}$비율은 일반생식군에서 영양불균형대조군에 비해 유의적으로 증가한 반면(P<0.05), 열처리생식군과 영양불균형대조군 간에는 유의적 차이가 없었다. 이상의 결과를 종합해 보면 열처리를 하지 않은 현미 및 율무 함유 생식은 열처리생식에 비해 영양불균형 흰쥐의 체내 콜레스테롤 농도 저하효과 및 장간막임파절의 면역활성도 증가효과가 더 우수한 것으로 나타냈다.

Keywords

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