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胆固醇修饰富勒烯/γ-环糊精包结复合物的生物活性 被引量:8

Biological Activity of a Cholesterol Modified Fullerene/γ-Cyclodextrin Inclusion Complex
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摘要 采用Bingel-Hirsch反应合成了胆固醇修饰的富勒烯(CHL-C60),通过核磁共振(NMR)、质谱(MS)、元素分析对CHL-C60的化学结构进行了表征.γ-环糊精(γ-CD)对甾环具有较强的包结能力,能够与CHL-C60形成包结复合物(CHL-C60/γ-CD),从而有效提高CHL-C60的水溶性.紫外-可见吸收光谱和荧光光谱研究结果表明,CHL-C60能够从γ-CD的疏水空腔中解离出来,与人血清白蛋白(HSA)及牛血清白蛋白(BSA)形成稳定的复合体,其结合常数分别为5.73×104和7.05×104L.moL-1.无氧条件下,CHL-C60/γ-CD通过光诱导电子转移作用断裂pBR322质粒脱氧核糖核酸(DNA),其效率可达60.5%. A cholesterol modified fullerene (CHL-C60) was synthesized using the Bingel-Hirsch reaction and was characterized by nuclear magnetic resonance (NMR), mass spectra (MS), elemental analysis (EA). Results of UV-Vis spectrum and fluorescence spectrum indicate that CHL-C60 forms an inclusion complex with γ-cyclodextrin (γ-CD) due to the strong interaction between γ-cyclodextrin and the steroid ring. The water solubility of CHL-C60 is enhanced significantly. CHL-C60 can dissociate from cyclodextrin and subsequently bind to human serum albumin (HSA) and bovine serum albumin (BSA) with association constants of 5.73× 10^4 and 7.05×10^4 L-moL^-1, respectively. The efficiency of desoxyribonucleic acid (DNA) photocleavage for CHL-C60/γ-CD is as high as 60.5% under anaerobic conditions, which is caused by photoinduced electron transfer from pBR322 plasmid DNA to CHL-C60.
出处 《物理化学学报》 SCIE CAS CSCD 北大核心 2010年第2期495-501,共7页 Acta Physico-Chimica Sinica
基金 教育部留学回国人员科研启动基金(N9YK0003,N9YK0005) 西北工业大学基础研究基金(W018113) 西北工业大学翱翔之星项目(R0120)资助~~
关键词 富勒烯 环糊精包结物 血清白蛋白 DNA断裂 Fullerene Cyclodextrin inclusion complex Serum albumin DNA cleavage
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