中文摘要：

地锦草为大戟科植物地锦（Euphorbia humifusa Willd）或斑地锦（Euphorbia maculataL）的干燥全草，是中医、维吾尔医常用药材，临床主要用于治疗手癣、体癣、足癣、花斑癣、银屑病.以往研究表明，地锦草提取物及其有效部位（含40％黄酮和16％鞣酸）对浅部致病真菌有较强的抑制作用。

英文摘要：

This study is to investigate the effect of Euphorbia humifusa effective fraction （EHEF） on the CYP51 enzyme activity, the lanosterol content and the MEP, SUB gene expression of Trichophyton rubrum. Trichophyton rubrum was treated by EHEF for 7 days at 26 ~C. The activity of CYP51 enzyme of Trichophyton rubrum in the cell membrane was determined by using ELISA kit, and the lanosterol content was investigated by using high performance liquid chromatography （HPLC）, and the MEP, SUB gene expression of Trichophyton rubrum was detected with the reverse transcription polymerase chain reaction （RT-PCR） method. Results showed that EHEF can decrease the membrane CYP51 enzyme activity, and it also can accumulate the fungal lanosterol in a dose-dependent manner, and it also can decrease the gene expression of MEP and SUB. The antifungal mechanism of EHEF may be related to the inhibition on CYP51 enzyme activity, and to the effects on fungal cell membrane ergosterol biosynthesis. It may also play an antifungal effect by inhibiting the MEP, SUB gene expression of fungal proteases.