생명과학회지 (Journal of Life Science)

  • 제20권2호
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  • Pages.161-168
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  • 2010
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  • 1225-9918(pISSN)
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  • 2287-3406(eISSN)
한국생명과학회 (Korean Society of Life Science)
권호 표지
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Streptozotocin으로 유발된 당뇨쥐의 신장 손상에 대한 white-skinned sweet potato (Ipomoea batatas L.) 추출물의 보호효과

Protective Effect of White-Skinned Sweet Potato (Ipomoea batatas L.) against Renal Damage in Streptozotocin-Induced Diabetic Rats

  • 장혜원 (성균관대학교 의과대 삼성서울병원 내분비내과) ;
  • ;
  • 문경옥 (경성대학교 약학대학 약학과) ;
  • 박종옥 (경성대학교 화학과)
  • Jang, Hye-Won (Division of Endocrinology & Metabolism, Samsung Medical Center, Sungkyunkwan University School of Medicine) ;
  • Bachri, Moch. Saiful (Faculty of Pharmacy, Ahmad Dahlan University) ;
  • Moon, Kyung-Ok (College of Pharmacy Kyungsung University) ;
  • Park, Jong-Ok (Department of Chemistry, Kyungsung University)
  • 투고 : 2009.11.12
  • 심사 : 2010.02.06
  • 발행 : 2010.02.28
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초록

White-skinned sweet potato (WSP, Ipomoea batatas L.)는 일본, 인도네시아 등에서 당뇨병과 그 치료에 민간에서 사용되고 있다. 본 실험에서는 WSP의 메탄올 추출물을 체중 1 kg 당 Dose 100, 200 mg을 투여하여 streptozotocin으로 유발된 당뇨쥐에서 손상된 신장 보호효과를 평가하였고 그 효능을 인슐린 분비촉진제인 glimepiride (45 mg/kg 체중)와 비교해 보았다. WSP 메탄올 추출물과 glimepiride를 2주 투여 한 후 혈당, 혈중 요소성 질소(BUN), 크레아티닌, 젖산 탈수소효소(LDH), 지질 과산화물(LPO) 함량, 그리고 항산화효소들인 superoxide dismutase (SOD), 카탈라아제(CAT), 글루타치온 과산화물 분해효소(GPx), 글루타치온 S-전이효소(GST) 등의 활성도를 측정하였다. BUN, 크레아티닌, LDH, 혈당, LPO 함량 등은 대조군에 비하여 그 값이 증가하였고, SOD, CAT, GPx, GST 값은 감소하였다. WSP 메탄올 추출물(200 mg/kg)을 투여한 후 측정한 값은 혈당, LPO, 신장병 표지인자인 BUN, 크레아티닌, LDH, 그리고 지질 과산화물 함량에서 의미있는 개선효과를 볼 수 있었고 항산화효소, 항산화물질의 증가도 나타났다. 따라서 WSP 메탄올 추출물은 당뇨쥐의 혈당을 낮추며 산화적 스트레스를 약화시키고 당뇨로 유발된 신장 손상을 보호해 주는 효과가 있다는 결과를 얻었다. 또한 민간에서 사용하고 있는 WSP가 실제로 당뇨 치료에 효과가 있음을 과학적 증거로 제공해 주었다고 판단된다.

White-skinned sweet potato (Ipomoea batatas L.) has been traditionally used for diabetes treatment and management in many countries. In this experiment, methanol extract of white-skinned sweet potato (WSPMe) at a dose of 100 or 200 mg/kg body weight was tested to evaluate its effect on renal damage in streptozotocin (STZ)-induced diabetic rats. Its efficacy was compared with that of insulin secretogogue, glimepiride ($50\;{\mu}g/kg$ body weight). Experimental diabetes was induced by a single dose of STZ (45 mg/kg, i.p.) injection. The WSPMe and glimepiride were administered orally for 14 days and the effects on glucose, renal markers including blood urea nitrogen (BUN), creatinine and lactate dehydrogenase (LDH), lipid peroxide (LPO) level, antioxidant enzymes superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GPx) and glutathion-S-transferase (GST) activities in kidney were studied. An increase in BUN, creatinine, LDH, glucose, LPO levels and decrease in SOD, CAT, GPx and GST features were observed in diabetic control rats. Administration of WSPMe at a dose of 200 mg/kg body weight caused a significant improvement in blood glucose, LPO level, renal markers, lipid peroxidation markers and increased antioxidant levels in diabetic kidney. In conclusion, the WSPMe was found to be effective in reducing oxidative stress, thus confirming the ethnopharmacological use of I. batatas L. in protecting diabetes and its complications.

키워드

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