Journal of Life Science (생명과학회지)

Korean Society of Life Science (한국생명과학회)
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Cyanidin-3-O-glucoside Ameliorates Postprandial Hyperglycemia in Diabetic Mice

당뇨 마우스에서 cyanidin-3-O-glucoside의 식후 고혈당 완화 효과

  • Choi, Kyungha (Department of Food Science and Nutrition, and Research Institute of Ecology for the Elderly, Pusan National University) ;
  • Choi, Sung-In (Department of Food Science and Nutrition, and Research Institute of Ecology for the Elderly, Pusan National University) ;
  • Park, Mi Hwa (Department of Food and Nutrition, College of Medical and Life Science, Silla University) ;
  • Han, Ji-Sook (Department of Food Science and Nutrition, and Research Institute of Ecology for the Elderly, Pusan National University)
  • 최경하 (부산대학교 식품영양학과) ;
  • 최성인 (부산대학교 식품영양학과) ;
  • 박미화 (신라대학교 식품영양학과) ;
  • 한지숙 (부산대학교 식품영양학과)
  • Received : 2016.07.29
  • Accepted : 2016.11.03
  • Published : 2017.01.30
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Abstract

Cyanidin-3-O-glucoside (C3G) shows anti-inflammatory and antioxidant effects; however, its effect on postprandial blood glucose levels remains unknown. Alpha-glucosidase inhibitors regulate post-prandial hyperglycemia by impeding carbohydrate digestion in the small intestine. Here, the effect of C3G on ${\alpha}-glucosidase$ and ${\alpha}-amylase$ inhibition and its ability to ameliorate postprandial hyperglycemia in streptozotocin (STZ)-induced diabetic mice were evaluated. ICR normal and STZ-induced diabetic mice were orally administered soluble starch alone or with C3G or acarbose. The half-maximal inhibitory concentrations of C3G for ${\alpha}-glucosidase$ and ${\alpha}-amylase$ were 13.72 and $7.5{\mu}M$, respectively, suggesting that C3G was more effective than acarbose. The increase in postprandial blood glucose levels was more significantly reduced in the C3G groups than in the control group for both diabetic and normal mice. The area under the curve for the diabetic mice was significantly reduced following C3G administration. C3G may be a potent ${\alpha}-glucosidase$ inhibitor and may delay dietary carbohydrate absorption.

Cyanidin-3-O-glucoside (C3G)는 오디와 붉은색의 과일에 풍부하게 함유되어 있으며, 항염증과 항산화 효과와 관련하여 보고되어있다. 그러나, C3G의 식후 혈당에 관한 연구 결과는 보고되지 않았다. ${\alpha}-glucosidase$ 억제제는 소장에서 탄수화물 소화의 속도를 방해함으로써 식후 고혈당을 조절한다. 본 연구에서는 C3G가 ${\alpha}$-글루코시다아제와 ${\alpha}$-아밀라아제에 미치는 억제효과 및 스트렙토조토신(STZ)이 유발하는 당뇨병 생쥐의 식후고혈당에 미치는 완화 효과를 조사하였다. ICR 마우스와 streptozothocin (STZ)으로 유도된 당뇨병 마우스에 수용성 전분(2 g/kg body weigh)으로 경구부하 후 C3G (10 mg/kg body weight) 또는 acarbose (10 mg/kg body weight)를 단독 또는 함께 투여하였다. 혈액 샘플은 꼬리에서 0, 30, 60, 120분 간격으로 채취하였다. ${\alpha}$-글루코시다아제와 ${\alpha}$-아밀라아제에 대한 C3G의 $IC_{50}$ 값은 각각 13.72와 $7.5\;{\mu}M$의 결과값을 나타내어, 양성대조군인 acarbose보다 더 효과적이었다. STZ으로 유발된 당뇨 쥐의 식후 혈당 수치는 대조군에 비해 C3G 투여시 유의적으로 더 낮았다. 게다가, C3G 투여는 당뇨병 흰쥐에서 포도당 반응에 대한 곡선하면적 감소와 관련이 있었다. 그러므로, C3G는 ${\alpha}$-글루코시다아제의 강력한 억제제이며 식이 탄수화물의 흡수를 지연시킬 수 있음을 나타낸다.

Keywords

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