생명과학회지 (Journal of Life Science)

  • 제18권9호
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  • Pages.1305-1311
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  • 2008
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  • 1225-9918(pISSN)
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  • 2287-3406(eISSN)
한국생명과학회 (Korean Society of Life Science)
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추출용매 변화에 따른 바나바(Lagerstroemia speciosa Pers.) 잎 추출물의 항당뇨 효과

Anti-diabetic Effects of Banaba Leaf Extracts (Lagerstroemia speciosa Pers.) through Solvents

  • Kim, Kyun-Ha (Department of Biology, College of Natural Siences, Pusan National University) ;
  • Roh, Sang-Geun (Department of Biology, College of Natural Siences, Pusan National University) ;
  • Li, Chun-Ri (Liaoning University of Traditional Chinese Medicine) ;
  • Jin, Chun-Feng (Liaoning University of Traditional Chinese Medicine) ;
  • Kim, Andre (Department of Chemistry and Chemistry Institute for functional materials, Pusan National University) ;
  • Choi, Won-Chul (Department of Biology, College of Natural Siences, Pusan National University)
  • 발행 : 2008.09.30
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초록

본 연구는 바나바 잎 추출 용매에 따른 항당뇨 효과에 관한 것으로 세포 독성 실험을 통하여 인체에 대한 독성이 없음을 확인하였고 $\beta$-cell 인슐린 분비 실험을 통하여 항당뇨 효과를 알아보았다. 또한 당뇨 유발쥐를 이용한 인슐린 분비 실험, 체중변화 측정, 혈중 및 혈청의 glucose 농도, 총콜레스테롤 수치, HDL-cholesterol 농도, triglyceride 농도, free fatty acid 농도, langerhans islet에서의 인슐린 분비 의 확인을 통해 혈당조절 효과를 비교하였다. 물 혹은 에탄올을 단독으로 이용하여 추출한 추출물이나 70%, 90% 에탄올로 추출한 추출물 보다 열수로 먼저 추출한 후 에탄올로 다시 추출하여 혼합안 추출물이 항당뇨 효과가 더 뛰어남을 알 수 있었다. 이는 친수성(hydrophilic) 유효성분들과 소수성(hydrophobic) 유효성분들의 추출 유무나 함량에 의한 것이다. 특히, 많은 문헌에 언급된 코로소린산이라는 단일 성분(unique)에 의한 항당뇨 효과라기보다는 친수성 및 소수성 폴리페놀 및 항산화성분과 같은 유효성분들이 조합되어(mixture) 항당뇨 효과에 영향을 미치는 것으로 사료된다.

This study investigated that the antidiabetic effects of banaba extracts with variety solvents selectivity in vitro and in vivo. Banaba extracts were prepared with water, 70% ethanol, 90% ethanol, 100% ethanol and water-ethanol that of extract twice times sequentially water and ethanol. Cell toxicity and insulin secretion of banaba extracts was tested by MTT (3-[4,5-dimetylthiazol-2-yl]-2,5-diphenyltetrazolium bromide) assay on hamster insulinoma cell line, HIT-T15. Also we tested that insulin, body weight, blood glucose, total cholesterol, HDL-cholesterol, triglyceride and free fatty acid in streptozotocin diabetic rats. Water-ethanol extract has remarkable antidiabetic effect compare with the other banaba extracts. For water-ethanol extract has both of hydrophilic and hydrophobic antidiabetic materials from banaba. Expecially, corosolic acid, as known as unique polyphenol, has antidiabetic effect studied by many researchers till nowadays. But corosolic acid does not solve in water. Otherwise, we suggest that banaba extract of hydrophilic and hydrophobic materials (polyphenol and antioxidants) mixture more increased antidiabetic effects.

키워드

참고문헌

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