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

The Korean Society of Food Science and Nutrition (한국식품영양과학회)
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Antidiabetic Effect of Korean Red Ginseng by Puffing Process in Streptozotocin-Induced Diabetic Rats

Streptozotocin 유발 당뇨쥐에서 팽화가공 처리한 홍삼의 항당뇨 효과

  • Kim, Shin-Hee (Dept. of Food and Nutrition, Chungnam National University) ;
  • Kang, Ju-Seop (Dept. of Pharmacology & Clinical Pharmacology Lab, Institute of Biochemical Sciences, College of Medicine, Hanyang University) ;
  • Lee, Sang-Jun (Dept. of Food Science, Chungkang College of Cultural Industries) ;
  • Chung, Young-Jin (Dept. of Food and Nutrition, Chungnam National University)
  • 김신희 (충남대학교 식품영양학과) ;
  • 강주섭 (한양대학교 의과대학 약리학교실 임상약리학실험실) ;
  • 이상준 (청강문화산업대학 식품과학과) ;
  • 정영진 (충남대학교 식품영양학과)
  • Published : 2008.06.30
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Abstract

Antidiabetic effect of Korean red ginseng (RG) processed by puffing in streptozotocin (STZ)-induced diabetic (DM) rats was investigated. Five week-old SD rats were divided into four groups; normal control (NC) group, DM group, red ginseng (RG) group and puffed red ginseng (PG) group. The RG and PG groups were orally provided with RG or PG dissolved in water (500 mg/kg) respectively for seven weeks after single injection of STZ (50 mg/kg, i.v.) followed by identification of DM. NC group received saline vehicle instead of STZ. At the end of feeding of RG or PG, the changes of fasting blood glucose, serum insulin and amylase level and serum lipid profiles were evaluated. Also, oral glucose tolerance test (OGTT), comet assay and histopathological examination were performed. At 7th week, the fasting blood glucose levels of the RG and PG groups were reduced compared to the DM group by 11.54% and 20.22%, respectively. The result of OGTT did not show significant differences among DM and two red ginseng groups. While serum insulin and TG levels were predominantly improved in PG group (p<0.05), serum amylase level was increased in RG group. Alkaline comet assay for checking the oxidative damage of DNA showed that TL (tail length, ${\mu}m$) and TM (tail moment) in the blood lymphocyte of PG group significantly decreased in contrast with DM group. Histopathological results of pancreas showed that destruction of exocrine as well as endocrine might be cured by the administration of RG and PG. These results suggest that PG could exert more protection against STZ-induced toxicity than RG group.

본 실험에서는 STZ로 당뇨를 유발시킨 흰쥐에 홍삼과 팽화홍삼의 항당뇨 효능에 대한 생리활성을 규명하고자 홍삼을 7주간 경구투여 후 체중, 혈당, 혈청 인슐린 및 아밀라아제, 지질관련 지수, OGTT, DNA의 산화적 손상정도 분석 및 췌장의 조직병리학적 변화를 관찰하였다. 체중증가는 실험 7주 후에 DM군과 비교 시 RG군에서 6.67배, PG군에서 5.25배 증가하였으나 DM군과 유의적인 차이는 없었다. 공복혈당은 DM군에 비해 RG군에서 11.54%, PG군에서 20.22%의 감소를 보였다. 구강내당능 검사결과 공복혈당, 포도당 투여 2시간 후 혈당은 DM군과 통계적 유의성은 없었다. 혈청 인슐린 농도는 PG군에서 가장 높게 나타났고, 혈청 아밀라아제 농도의 경우 RG군에서 높았으나 NC군보다는 낮게 나타났다. 혈청 총 콜레스테롤은 NC군을 제외한 모든 실험군 간에 유의적인 차이를 보이지 않았으나 혈청 중성지방의 경우 PG군에서 현저한 감소를 보였다(p<0.05). HDL-C는 NC군에 비해 당뇨유발군 모두에서 높게 나타났다. DNA 손상정도를 알아보기 위한 comet 분석에서는 PG군의 TL 및 TM은 NC군에서와 유사한 수준을 보였다. 췌장조직의 병리학적 관찰결과, 당뇨유발군 중 DM군의 췌장조직의 exocrine acinal cell 및 췌도세포에서는 focal 또는 multifocal cytoplasmic vacuolation과 췌장실질의 괴사 및 출혈성 병변이 관찰되었다. 이상의 결과로서 팽화홍삼의 투여가 홍삼에 비해 항당뇨 효과가 더 큰 경향을 보였으나 보다 확실한 결과를 위해 8주 이상의 홍삼 장기투여에 의한 항당뇨 효과 확인이 필요할 것으로 사료된다.

Keywords

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