| 光谱法研究盐酸小檗碱与DNA的相互作用 |
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| 引用本文： | 李建晴,卫艳丽,董川.光谱法研究盐酸小檗碱与DNA的相互作用[J].分析科学学报,2010,26(1). |
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| 作者姓名： | 李建晴 卫艳丽 董川 |
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| 作者单位： | 1. 晋中学院化学化工学院,山西晋中,030600
2. 山西大学环境科学与工程研究中心,太原,030006 |
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| 基金项目： | 国家自然科学基金(No.20575037);;山西省归国留学人员基金(2008) |
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| 摘 要： | 采用荧光和紫外(UV)光谱等手段,研究了中药有效成分小檗碱(Ber)与脱氧核糖核酸(DNA)的键合作用。结果发现,小檗碱能插入到DNA双螺旋碱基对之间的空腔中,使小檗碱在eλm=530 nm处较弱的荧光强度显著提高;酸度显著影响其相互之间的作用;随着DNA浓度的增大,Ber的荧光强度增大,显示了很好的光敏性能。偏振、荧光猝灭实验等也进一步表明:Ber与DNA的作用方式主要是嵌插结合;离子强度的大小会影响Ber与DNA之间的作用。在pH=3.0适宜酸度条件下,建立了以Ber为探针定量测定DNA的分析方法。方法线性范围为0~5.2×10-5mol/L,精密度(RSD)为2.7%(n=7),检出限为1.43×10-7mol/L。
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| 关 键 词： | 小牛胸腺DNA 盐酸小檗碱 荧光光谱法 |
Study on the Interaction between Berberin and DNA by Spectroscopy Methods |
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| LI Jian-qing,WEI Yan-li,DONG Chuan.Study on the Interaction between Berberin and DNA by Spectroscopy Methods[J].Journal of Analytical Science,2010,26(1). |
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| Authors: | LI Jian-qing WEI Yan-li DONG Chuan |
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| Institution: | 1.Jingzhong College;Jingzhong 030600;2.Environmental-science andEngineering-study Center;Shanxi University;Taiyuan 030600 |
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| Abstract: | The binding of berberine to calf thymus DNA was investigated by fluorescence and ultraviolet-visible absorption spectroscopy.The experimental results revealed that the intercalation of berberine into calf thymus DNA leaded to a dramatic enhancement of the photoluminescence of the drug at 530 nm.The absorption and fluorescence spectra,salt concentration effect,KI quenching,fluorescence polarization and DNA denaturation experiments were given.These results provided the evidence that Ber was inserted into the ... |
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| Keywords: | Berberine Calf Thymus DNA Fluorescence spectroscopy |
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