华南理工大学学报(自然科学版) ›› 2010, Vol. 38 ›› Issue (5): 133-138.doi: 10.3969/j.issn.1000-565X.2010.05.026

• 生物工程 • 上一篇    下一篇

新型纳米复合材料作为非病毒基因载体的研究

王小英1  刘博1  林鹿1  吴军2  孙润仓1   

  1. 1.华南理工大学 制浆造纸工程国家重点实验室, 广东 广州 510640; 2.中国科学院 南海海洋研究所, 广东 广州 510301
  • 收稿日期:2009-06-09 修回日期:2009-09-27 出版日期:2010-05-25 发布日期:2010-05-25
  • 通信作者: 王小英(1978-),女,博士,讲师,主要从事再生资源化学生物学研究. E-mail:xyw@seut.edu.cn
  • 作者简介:王小英(1978-),女,博士,讲师,主要从事再生资源化学生物学研究.
  • 基金资助:

    国家“973”计划项目(2010CB732201); 国家自然科学基金资助项目(30972323 30710103906); 中国科学院海洋生物资源可持续利用重点实验室、广东省应用生物学重点实验室和海洋药物重点实验室联合开放基金资助项目(LMB081002)

Investigation into Novel Nanocomposites as Non-Viral Gene Carrier

Wang Xiao-ying Liu Bo Lin Lu1  Wu JunSun Run-cang1   

  1. 1.State Key Laboratory of Pulp and Paper Engineering,South China University of Technology,Guangzhou 510640,Guangdong,China;2.South China Sea Institute of Oceanology,Chinese Academy of Sciences,Guangzhou 510301,Guangdong,China
  • Received:2009-06-09 Revised:2009-09-27 Online:2010-05-25 Published:2010-05-25
  • Contact: 王小英(1978-),女,博士,讲师,主要从事再生资源化学生物学研究. E-mail:xyw@seut.edu.cn
  • About author:王小英(1978-),女,博士,讲师,主要从事再生资源化学生物学研究.
  • Supported by:

    国家“973”计划项目(2010CB732201); 国家自然科学基金资助项目(30972323 30710103906); 中国科学院海洋生物资源可持续利用重点实验室、广东省应用生物学重点实验室和海洋药物重点实验室联合开放基金资助项目(LMB081002)

摘要: 为了制备理想的非病毒基因载体,合成了甲壳三糖-g-壳聚糖(TCS),并与钙基累托石(REC)插层复合制备纳米复合材料,采用X射线衍射和透射电镜方法对产物进行了表征,考察了其细胞相容性,将REC、TCS和纳米复合材料分别与质粒DNA复合形成复合物,并考察了其体外基因转染效果.结果表明:TCS、REC及纳米复合材料的细胞相容性良好,当N/P比为3时,TCS/DNA复合物粒径大小都在75 nm左右,REC加入后,其粒径不同程度地增大,最大达到191 nm;相对分子质量高的TCS所得DNA复合物较相对分子质量低的TCS所得DNA复合物稳定,而REC的加入降低了TCS/DNA复合物的稳定性;TCS/REC-DNA复合物能介入肝癌细胞中并表达荧光.说明该纳米复合材料可作为潜在的非病毒基因载体.

关键词: 甲壳三糖-g-壳聚糖, 累托石, 插层, 纳米复合材料, 基因转染

Abstract:

In order to obtain ideal non-viral gene carriers,trisaccharide-g-chitosan(TCS) was synthesized and was intercalated into rectorite(REC) to prepare novel nanocomposite.The product was then characterized by means of XRD and TEM,with its cellular compatibility being also analyzed.Moreover,REC,TCS and the prepared nanocomposite were respectively combined with plasmid DNA to form novel complexes,whose gene transfection effects in vitro were also evaluated.The results indicate that REC,TCS and the prepared nanocomposite all have good cellular compatibility,that the TCS/DNA complex is about 75nm in size at a N/P ratio of 3,that the addition of REC may increase the size up to 191nm,that the stability of TCS/DNA complex is positively correlated to the relative molecular mass of TCS and may degrade due to the addition of REC,and that TCS/REC-DNA complex can enter into hepatoma cells with fluorescence expression.It is thus concluded that TCS/REC nanocomposite is a potential non-viral gene carrier.

Key words: trisaccharide-g-chitosan, rectorite, intercalation, nanocomposite, gene transfection