Microbiology and Biotechnology Letters (한국미생물·생명공학회지)

The Korean Society for Microbiology and Biotechnology (한국미생물·생명공학회)
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Screening of $\alpha$-Amylase and $\alpha$-Glucosidase Inhibitor from Nepalese Plant Extracts

100종 네팔 식물 추출물로부터 $\alpha$-Amylase 및 $\alpha$-Glucosidase저해제의 선별

  • Kim, Mi-Sun (Dept. of Food and Nutrition, Andong National University) ;
  • Ahn, Seon-Mi (Dept. of Food and Nutrition, Andong National University) ;
  • Jung, In-Chang (Dept. of Food and Nutrition, Andong National University) ;
  • Kwon, Gi-Seok (The School of Bioresource Science, Andong National University) ;
  • Sohn, Ho-Yong (Dept. of Food and Nutrition, Andong National University)
  • 김미선 (안동대학교 식품영양학과) ;
  • 안선미 (안동대학교 식품영양학과) ;
  • 정인창 (안동대학교 식품영양학과) ;
  • 권기석 (안동대학교 생명자원과학부) ;
  • 손호용 (안동대학교 식품영양학과)
  • Received : 2010.02.01
  • Accepted : 2010.03.17
  • Published : 2010.06.28
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Abstract

In the course of screening for anti-acidosis and anti-diabetes agent from natural products, the inhibitory activities of Nepales plant extracts against microbial $\alpha$-amylase and $\alpha$-glucosidase were evaluated. Among the 100 different kinds of ethanol extracts, Cedrus deodara (Roxb.) G. Don and Myrica nagi Thunb showed strong inhibition activities against $\alpha$-amylase. The $IC_{50}$ values of C. deodara (Roxb.) G. Don, M. nagi Thunb and acarose, a commercial available anti-diabetes agent, were 44.5, 47.5 and $50.5\;{\mu}g/mL$, respectively. Considering the crude extract of C. deodara (Roxb.) G. Don, and M. nagi Thunb, these extracts have strong potentials as anti-acidosis or anti-diabates agent. In a while, Cleistocalyx operculatus (Roxb.) extract showed a good inhibition activity to $\alpha$-amylase and $\alpha$-glucosidase, even it was recently reported. The selected three extracts did not show any hemolysis activity against human red blood cell up to 1 mg/mL, and the inhibition activities were maintained by heat or acid treatment. Moreover, treatment of HCl (0.01N) for 1 h into C. operculatus (Roxb.) and M. nagi Thunb increased the inhibition activity from 50% to 70%. Our results suggest that C. deodara (Roxb.) G. Don, M. nagi Thunb, and C. operculatus (Roxb.) are potential as anti-acidosis and anti-diabetes agents.

반추동물의 급성 산독증의 예방 및 치료제 개발 연구의 일환으로 100종의 네팔 식물추출물을 이용하여 미생물 유래의 $\alpha$-amylase 및 $\alpha$-glucosidase 저해 활성을 평가하였다. 그결과 Cedrus deodara(Roxb.) G. Don와 Myrica nagi Thunb.추출물에서 acarbose보다 강력한 $\alpha$-amylase 저해활성을 확인하였으며, 각각의 $IC_{50}$는 44.5, 47.5 및 $50.5\;{\mu}g/mL$로 확인되었다. 또한 고혈당 치료 효과가 보고된 Cleistocalyx operculatus(Roxb.) 추출물에서는 강력한 $\alpha$-amylase 저해활성 및 양호한 $\alpha$-glucosidase 저해 활성을 확인하였다. 최종 선정된 3종의 추출물은 1 mg/mL 농도까지 인간적혈구에 대한 용혈활성이 없었으며, $80^{\circ}C$, 또는 0.01N HCl 조건에서 60분간 처리시에 활성의 변화가 나타나지 않았으며, 특히 C. operculatus(Roxb.)와 M. nagi Thunb의 경우 산 처리시에 오히려 20% 정도의 저해활성의 증가가 나타났다. 이러한 결과는, 최종 선정된 3종의 추출물이 미생물 유래의 전분분해 효소의 저해를 통해 반추동물의 급성 산독증 예방 및 치료에 이용 가능함을 제시하고 있다.

Keywords

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