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KMID : 0370219980420020144
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Yakhak Hoeji
1998 Volume.42 No. 2 p.144 ~ p.148
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Screening of In vitro DNA-binding Activity from the Crude Drugs
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김윤설/Kim YS
정세준/신화우/김윤철/Jeong SJ/Shin HW/Kim YC
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Abstract
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One hundred and seventeen crude drugs were screened for DNA-binding activity in vitro. The DNA-methyl green assay is a useful biochemical screen for the detection or development of biologically active compounds which bind to DNA. This assay is based upon the fact that free methyl green undergoes rapid spontaneous molecular rearrangement to its colorless carbinol base so that the liberation of the dye from DNA by displacement can be followed spectrophotometrically as a decrease in absorbance at 65Onm. Seven methanolic extracts of crude drugs including Cinnamomi Cortex spissus, Coicis Semen, Coptidis Rhizoma, Perillae Semen, Plantaginis Semen, Polygalae Radix and Zanthoxyli Fructus showed less than 2,000mcg/ml as their IC50 values. The active principles of Plantaginis Semen and Zanthoxyli Fructus were transferred into organic solvents, which showed the IC50 values with 588 and 574mcg/ml, respectively. These fractions have been selected for isolation of biologically active constituents.
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