| 摘要 |
PURPOSE: Provided are extracts and fractions of Betula platyphylla var. japonica having antioxidant and/or anticancer activities. They alleviate and/or treat cell damage by reactive oxygen species, remove radicals to inhibit the formation of lipid peroxide and have anticancer activity. CONSTITUTION: Betula platyphylla var. japonica is extracted with a polar solvent, such as 70% methanol. Therefore, the extract has antioxidation effects, such as inhibition of lipid peroxide formation and cell apoptosis, radical removal, activation of superoxide dismutase, catalase or glutathione peroxylase, and the like. A fraction of the Betula platyphylla var. japonica extract is fractioned with ethylacetate, butanol, hexane, dichloromethane or water.
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