Journal of Life Science (생명과학회지)

Korean Society of Life Science (한국생명과학회)
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Antidiabetic Effects of Leaves Extracts of Psidium guajava L. and Lagerstroemia speciosa L. in STZ-induced Rats

STZ으로 당뇨를 유발한 실험쥐에 대한 Psidium guajava L.과 Lagerstroemia speciosa L. 잎 추출물의 항당뇨 효과

  • Roh, Sang-Geun (Department of Biology, College of Natural Sciences, Pusan National University) ;
  • Kim, Kyun-Ha (Department of Biology, College of Natural Sciences, Pusan National University) ;
  • Choi, Won-Chul (Department of Biology, College of Natural Sciences, Pusan National University)
  • Published : 2009.01.30
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Abstract

Guava (Psidium guajava L.) and banaba (Lagerstroemia speciosa L.) are well known as medicinal plants for their antidiabetic effects. These contain a great deal of polyphenol compound and work on the treatment of diabetes mellitus effectively. In this study, the extracts of guava and banaba are consumed by streptozotocin (STZ) induced diabetic rats to compare the antidiabetic effects. According to the comparison result, the glucose level of those STZ-induced diabetic rats has decreased by 19.32%, total cholesterol by 24-46%, triglyceride by 22-67% and free fatty acid by 49-71 % approximately compared to the diabetic rats, while the generation of insulin and the recovery of beta cells have increased. However, the result showed that the antidiabetic effect of guava extracts was higher than that of banaba extracts. This is because the hydrophilic polyphenol compounds contained in banaba leaves were not extracted during the ethanol extraction process, and the antidiabetic activity of the extracted corosolic add was low to surprise.

구아바(Psidium guajava L.)와 바나바(Lagerstroemia speciosa L.)는 항당뇨 효과를 갖는 대표적인 약용식물로 알려져 있다. 이들 식물은 다양한 폴리페놀(polyphenol) 성분을 함유하며 당뇨병의 치료에 효과적으로 작용한다. 따라서 본 연구는 이들 추출물을 streptozotocin (STZ)으로 당뇨를 유발한 실험쥐에 섭취시켜 항당뇨 효과를 상호 비교하였다. STZ으로 당뇨를 유발한 실험쥐에 구아바 및 바나바 잎 추출물을 섭취시킨 결과 당뇨쥐에 비해 혈당은 약 19-32%, 총콜레스테롤(total cholesterol)은 약 24-46%, 중성지방(triglyceride)은 22-67% 그리고 유리지방산(free fatty acid) 은 49-71% 감소하였고 또한 인슐린 분비와 췌장에 존재하는 베타세포의 회복도 증가되었다. 한편 구아바 추출물의 섭취가 바나바 추출물의 섭취에 비해 항당뇨 효과가 더 높았는데 그 이유는 바나바 잎에 포함된 친수성 폴리페놀(polyphenol) 성분이 에탄올 추출과정에서 대부분 추출되지 않았고 또한 추출된 코로소릭산(corosolic acid) 은 지금까지 알려진 것과는 달리 항당뇨 활성이 낮았기 때문이다.

Keywords

References

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