Inhibitory effect of glucodistylin from the bark of Quercus acutissima on human recombinant aldose reductase and sorbitol accumulation.

Center for Efficacy Assessment and Development of Functional Foods and Drugs, Hallym University, Chuncheon, Korea.
Archives of Pharmacal Research (Impact Factor: 1.75). 02/2011; 34(2):211-5. DOI: 10.1007/s12272-011-0205-1
Source: PubMed

ABSTRACT A flavanol glycoside, glucodistylin (1) and three polyphenol derivatives, gallate (2), (+)-catechin (3) and (+)-gallocatechin (4) were isolated from an aqueous acetone extract of the bark of Quercus acutissima. Of these compounds, glucodistylin exhibited uncompetitive inhibitory activity against recombinant human aldose reductase with an IC(50) value of 7.2 μM. Furthermore, glucodistylin inhibited sorbitol accumulation by 48.84% at 50 μM. This flavonoid showed therapeutic potential in the prevention and treatment of diabetes-related complications.

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