Archives of Pharmacal Research

The Pharmaceutical Society of Korea (대한약학회)
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Isoflavonoids from the Rhizomes of Belamcanda chinensis and Their Effects on Aldose Reductase and Sorbitol Accumulation in Streptozotocin Induced Diabetic Rat Tissues

  • Jung, Sang-Hoon (Natural Products Research Institute, Seoul National University) ;
  • Lee, Yeon-Sil (Natural Products Research Institute, Seoul National University) ;
  • Lee, Sanghyun (Natural Products Research Institute, Seoul National University) ;
  • Lim, Soon-Sung (Natural Products Research Institute, Seoul National University) ;
  • Kim, Yeong-Shik (Natural Products Research Institute, Seoul National University) ;
  • Shin, Kuk-Hyun (Natural Products Research Institute, Seoul National University)
  • Published : 2002.06.01
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Abstract

Aldose reductase, the key enzyme of the polyol pathway, is known to play important roles in the diabetic complication. The inhibitors of aldose reductase, therefore, would be potential agents for the prevention of diabetic complications. To evaluate active principles for the inhibition of aldose reductase from the rhizomes of Belamcanda chinensis, twelve phenolic compounds were isolated and tested for their effects on rat lens aldose reductase. As a result, isoflavones such as tectorigenin, irigenin and their glucosides were found to show a strong aldose reductase inhibition. Tectoridin and tectorigenin, exhibited the highest aldose reductase inhibitory potency, their $IC_{50}$ values, being $1.08{\times}10^{-6}{\;}M{\;}and{\;}1.12{\times}10^{-6}{\;}M$, respectively, for DL-glyceraldehyde as a substrate. Both compounds, when administered orally at 100 mg/kg for 10 consecutive days to streptozotocin-induced diabetic rats, caused a significant inhibition of sorbitol accumulation in the tissues such as lens, sciatic nerves and red blood cells. Tectorigenin showed a stronger inhibitory activity than tectoridin. From these results, it is suggested that tectorigenin is attributed to be a promising compound for the prevention and/or treatment of diabetic complications.

Keywords

References

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