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 Dietary Supplementation of β-Carotene on Lipid Peroxide Level and Antioxidative Vitamins of Diabetic Rats

β-Carotene의 보충 급여가 당뇨쥐의 지질과산화물과 항산화비타민 함량에 미치는 영향

  • 서정숙 (영남대학교 식품영양학과) ;
  • 이경순 (영남대학교 식품영양학과) ;
  • 장정현 (영남대학교 식품영양학과)
  • Published : 2004.01.01
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Abstract

Diabetic vascular complications such as atherosclerosis have been reported as one of significant obstructions in treatment of diabetes. There has been a significant increase in recognition of the importance of antioxidative nutrients such as vitamin E, for the prevention of diabetic vascular complication by oxidative stress. This study focused on the effect of dietary $\beta$-carotene on the levels of lipid peroxide and antioxidative vitamins of diabetic rats. The plasma glucose level, hepatic level of lipid peroxide and contents of antioxidants such as vitamins A and E were determined in STZ-induced diabetic rats. Dietary supplementation of B-carotene did not reduce the blood glucose in diabetic rats. Hepatic level of lipid peroxide tended to increase in diabetic rats, but $\beta$-carotene intake reduced the value. Plasma levels of retinol and retinol/lipid were not changed by dietary supplementation of $\beta$-carotene. There was no significant difference among experimental groups in plasma level of $\alpha$-tocopherol. Hepatic levels of retionl and retinyl palmitate were increased by dietary supplementation of $\beta$-carotene in diabetic rats. These results suggest that the supplementation of $\beta$-carotene to the normal diet of diabetics may reduce the incidence of the diabetic vascular complications through the improvement of antioxidants depletion.

당뇨병 상태에서 항산화영양소인 carotenoids의 공급이 체내 항산화비타민의 함량에 어떠한 영향을 미치는지에 대하여 조사하고자 Sprague-Dawley종 흰쥐를 이용하여 당뇨를 유도하고 비타민 A와 E의 함량 변화를 측정하였다. 당뇨를 유도하기 전에는 체중증가량에 있어서 별다른 차이를 나타내지 않았으나 당뇨가 유도된 후에는 체중증가량이 감소되었으나 $\beta$-carotene의 섭취에 의한 영향은 나타나지 않았다. 식이섭취량은 당뇨쥐에서 대조군에 비해 별다른 차이를 나타내지 않았으나 식이효율은 대조군에 비해 당뇨군에서 유의적으로 감소되었다. 당뇨 유도로 흰쥐의 혈당치는 대조군에 비하여 2배 이상 증가하였으나 당뇨군 사이에서 $\beta$-carotene의 급여에 의한 혈당강하 효과는 관찰되지 않았다. 혈장의 retinol 함량은 당뇨군에서 유의적으로 감소하였으나 $\beta$-carotene의 급여에 의한 영향은 관찰되지 않았다. 당뇨군에서 retinol함량이 유의적으로 감소되었고 혈장의 $\alpha$-to-copherol의 함량은 혈장 지질 함량을 이용하여 보정하였을 때 당뇨군에서 현저한 감소를 보였으나 $\beta$-carotene의 급여에 의한 영향은 나타나지 않았다. 간조직 중의 retinol과 retinyl palmitate 함량은 당뇨 유발군에서 유의적인 감소를 보였으며, $\beta$-carotene 급여에 의해 증가하는 경향을 나타내었다. 그러나 $\alpha$-tocopherol 함량은 당뇨 유도와 $\beta$-carotene급여에 의해 영향을 받지 않았다. 이상의 결과를 통해 볼 때 당뇨병 환자의 혈관계 합병증을 예방하기 위해 한국인의 식생활에서 $\beta$-carotene 섭취를 효과적으로 할 수 있는 실제적인 식사관리 방안을 강구한다면 당뇨병환자의 혈관계 합병증을 완화시킬 수 있으리라고 여겨진다.

Keywords

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