Abstract:
PURPOSE: A composition containing Cirsium japonicum extract or compound isolated from the extract is provided to suppress aldose reductase and to prevent and treat diabetes or diabetes complication. CONSTITUTION: A composition for preventing or treating diabetes or diabetes compliation contains luteolin compound of chemical formula 1 or leuteolin 5-O-beta-D-glucopyranoside compound of chemical formula 2 as an active ingredient. The compounds are derived from Cirsium japonicum. The composition contains Cirsium japonicum crude extract or non-polar solvent soluble extract as an active ingredient. The crude extract of Cirsium japonicum is isolated using methanol, ethanol, propanol, isopropanol, n-butanol, or mixture solvent thereof.
Abstract:
A composition for preventing and treating diabetic complication is provided to drastically suppress generation activity of rat lens aldose reductase, recombinant human aldose reductase and advanced glycation endproducts (AGEs). A composition for preventing and treating diabetic complication comprises a Sophora flavescens extract or prenylated flavonoid compound isolated from the extract as an active ingredient. The prenylated flavonoid compound is denoted by the structural formula (1) to (14). The diabetic complication is artery scleroma, hypertension, intracerbroventricular infarction, stroke, myocardial infarction, angina, nephropathy, neuropathy, diabetic retinopathy, cataract or the glaucoma. The Sophora flavescens extract or prenylated flavonoid compound isolated from the extract is contained in 0.1-50 %weight based on total weight.