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靶向分子羧甲基多糖与DNA作用机理研究
Study on the Interaction Mechanism of Targeting Molecules Carboxymethyl Polysaccharide with DNA
【摘要】 以溴化乙锭(EB)为荧光探针,结合紫外光谱法研究了壳聚糖、羧甲基壳聚糖、羧甲基纤维素与DNA的相互作用,药物分子与DNA作用程度可用作用常数D来表示,实验表明:几种生物多糖与DNA分子的作用强弱顺序为:壳聚糖>羧甲基壳聚糖>羧甲基纤维素;多糖主要以嵌插方式与DNA作用,使EB-DNA荧光猝灭。
【Abstract】 The interaction of chitosan(CTS),carboxymethyl chitosans(CMCTS),and carboxymethyl cellulose(CMCL) with DNA was investigated through ethidium bromide(EB) as a sensitive fluorescence probe,and ultraviolet absorption spectra.The constant D can directly denote the degree of interaction of polysaccharide with DNA.The results indicated that the interraction sequence of biological polysaccharides with DNA is as follows: CTS>CMCTS>CMCL.The polysaccharides were mainly bound to DNA by intercalated binding,which resulted in fluorescence quenching effect of EB-DNA.
【关键词】 荧光探针;
羧甲基多糖;
脱氧核糖核酸;
作用常数;
【Key words】 Fluorescence probe; Carboxymethyl polysaccharide; Deoxyribonucleic acid; Function constant;
【Key words】 Fluorescence probe; Carboxymethyl polysaccharide; Deoxyribonucleic acid; Function constant;
【基金】 山西省归国留学基金(留管200407);山西高校科技研究开发项目(20041245)资助项目
- 【文献出处】 光谱学与光谱分析 ,Spectroscopy and Spectral Analysis , 编辑部邮箱 ,2006年04期
- 【分类号】R346
- 【被引频次】10
- 【下载频次】311