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The Korean Society for Biotechnology and Bioengineering (한국생물공학회)
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Inhibitory Activity on the Diabetes Related Enzymes of Tetragonia tetragonioides

번행초 추출물의 당뇨관련 효소에 관한 저해 활성

  • 최혜정 (창원대학교 대학원 생명공학협동과정) ;
  • 강점순 (부산대학교 생명자원과학부) ;
  • 최영환 (부산대학교 생명자원과학부) ;
  • 정영기 (동아대학교 생명공학과) ;
  • 주우홍 (창원대학교 생물학과)
  • Published : 2008.10.31
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Abstract

In this study, we examined the anti-diabetic activity in vitro by the crude extracts of Tetragonia tetragonioides which has been known to superior plants for the traditional prevention and treatment of stomach-related diseases. $\alpha$-Amylase and $\alpha$-glucosidase, the principal enzymes involved in the metabolism of carbohydrates, and aldose reductase, the key enzyme of the polyol pathway, have been shown to play the important roles in the complications associated with diabetes. A hexane (HX) fraction of T. tetragonioides were shown to inhibit more than 50% of salivary and pancreatin $\alpha$-amylase activity at concentration of 2.882 mg/mL and 2.043 mg/mL, respectively. In addition, the HX and ethylacetate (EA) fraction showed the highest inhibitory activity on yeast $\alpha$-glucosidase at values of $IC_{50}$ of 0.723 mg/mL and 1.356 mg/mL respectively. The HX, dichloromethane (DCM) and EA fraction showed more higher inhibitory activity on yeast $\alpha$-glucosidase than commercial agent such as 1-deoxynorjirimycin and acarbose. Also, the aldose reductase from human muscle cell had been inhibited strongly by the DCM fraction and HX fraction at 51.95% and 47.22% at a concentration of 1 mg/mL, respectively. Our study, for the first time, revealed the anti-diabetic potential of T. tetragonioides and this study could be used to develop medicinal preparations or nutraceutical and functional foods for diabetes and related symptoms.

본 연구에서 당뇨병의 예방, 치료제 및 건강기능 식품으로서 산업적 활용가능성을 평가하기 위한 기초연구로서 번행초 추출물을 사용하여 당뇨관련 효소인 $\alpha$-amylase, $\alpha$-glucosidase, $\beta$-glucosidase 그리고 aldose reductase에 대한 저해활성을 조사하였다. 번행초의 HX 분획물은 인간 타액, 돼지 췌장 $\alpha$-amylase에 대해 5 mg/mL 농도에서 각각 62.23%, 88.74%로 높은 저해효과를 나타냈으며, $\alpha$-glucosidase에 대해서도 HX 분획물이 1 mg/mL 농도에서 60.27%로 높은 저해효과를 나타냄으로써 현재 혈당강하제로 사용되고 있는 acarbose와 1-deoxynorjirimycin보다 높은 억제 효과를 보였다. 그리고 만성 합병증에 의한 시력장애, 신경성장애, 신장기능장애, 심장기능 장애 등의 심각한 당뇨병성 합병증 유발과 관련이 있는 aldose reductase에 대한 억제활성을 조사한 결과, 1 mg/mL 농도에서 번행초 DCM 분획과 HX 분획물이 각각 51.95%, 47.22%로 높은 저해활성을 나타냄으로써 당뇨병과 그로 인한 합병증의 예방에도 효과가 있는 것으로 판단된다. 전 세계적으로 당뇨병 환자가 증가추세에 있어 당뇨병 치료제의 시장 규모는 더욱 확대될 가능성이 높은 가운데 지금까지 보고되지 않은 번행초의 항당뇨 효능의 우수성을 검증함으로써 바이오산업육성뿐만 아니라 신소득 작물로 순화재배를 통한 농가소득 향상에도 기여할 것으로 기대된다.

Keywords

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