포도 품종별 추출물의 혈당 완화 활성 비교
Comparison of Anti-Diabetic Activities by Extracts of Grape Cultivar
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초록
포도 3종(Campbell early, MBA, 거봉)의 과피와 씨를 물과 ethanol을 이용하여 추출하였다. α-Glucosidase 저해 활성은 대부분의 추출물에서 저해 활성을 보였으며, 물 추출물이 가장 높은 저해 활성을 보였다. 그에 따라 물 추출물을 이용하여 streptozotocin (STZ)에 의해 유도된 당뇨 마우스 모델의 고혈당에 미치는 영향을 조사한 결과 캠벨(씨)의 물 추출물을 처리한 당뇨 유발 마우스의 혈당은 시간이 지날수록 그 수치가 떨어져 3시간이 지난 후에는 정상 수치까지 떨어지는 것을 확인할 수 있었고, 거봉(씨) 물 추출물을 처리한 마우스에서는 혈당 상승이 1/3 수준으로 완화되었다. 이러한 결과를 통하여 포도의 과피와 씨 추출물은 고혈당 개선에 효과를 지닐 것으로 판단되었으며 향후 혈당에 관련된 기타분자표적의 추적이 필요하다고 판단된다.
Abstract
To investigate the anti-diabetic activity of ethanol and aqueous peel and seed extracts obtained from three different grape species (Cambell Early, MBA, and Kyoho), alpha-glucosidase inhibitory activity was examined. All extracts showed anti-diabetic activity, especially aqueous extract exhibited inhibitory effect above 70%. Thus, we used aqueous extract to check the potential hypoglycemic effects in a streptozotocin (STZ)-induced diabetic mice model. The results showed that the blood glucose level of STZ-induced diabetic mice decreased drastically after 3 hr when the aqueous extract of Cambell Early seed was treated to the mice model. The aqueous extract of Kyoho seed lessened blood glucose level by 60%. Together, these data indicate that extracts of grape peel and seed (aqueous or ethanol) may have potential in improving hypoglycemic effects in the diabetic symptoms, suggesting that further investigation on biomarker expressions should be rewarding.
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