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国家自然科学基金(31830200)

作品数:4 被引量:13H指数:2
相关作者:夏昆蔡芳文路薛志刚龙志高更多>>
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发文基金:国家自然科学基金国家高技术研究发展计划国家重点基础研究发展计划更多>>
相关领域:医药卫生更多>>

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Expression of reconstructive hF Ⅷ in the hrDNA by using hrDNA targeting vector被引量:6
2005年
Our lab has constructed a new nonviral vec-tor—hrDNA targeting vector(pHrneo). pHrneo is a human derived vector that can target gene into human ribosomal DNA(hrDNA) locus. In this study, we inserted expression cassette of reconstructive hF Ⅷ (hFVIII-BDDAK39) to pHrneo to construct targeting vector: pHrneo-BDDAK39. Through electroporation of pHrneo-BDDAK39 into HT1080 cells, we identified the homologous recombinants by PCR and Southen blotting, and tested the expression of hFVIII- BDDAK39 in the hrDNA locus. The hFⅧ-BDDAK39 was successfully targeted into hrDNA locus of HT-1080 by pHrneo-BDDAK39, and the efficiency of site-specific inte-gration was 2.0×10?5. hFⅧ-BDDAK39 in hrDNA locus of HT-1080 is found to be able to express efficiently (32±5 ng·106 cells?1·24 h?1). Targeting vector pHrneo-BDDAK39 can find use in gene therapy for hemophilia.
LIU Xionghao LIU Mujun SHE Hua WEN Lu XUE Zhigang LIANG Desheng CAI Fang PAN Qian LONG Zhigao WU Lingqian DAI Heping XIA Kun XlA Jiahui
关键词:核糖体
利用核糖体基因区打靶载体靶向表达改造型人凝血因子Ⅷ被引量:4
2005年
构建了携带改造型hFⅧ(hFⅧ-BDDAK39)的核糖体基因区靶向表达载体pHrneo-BDDAK39,并将其转入人纤维肉瘤细胞(HT1080),检测其定点整合的能力及hFⅧ-BDDAK39的表达情况.结果显示,pHrneo-BDDAK39能够成功地将hFⅧ-BDDAK39靶入到HT1080细胞的核糖体基因区,定点整合效率达到2.0×10^(-5),并且靶入的hFⅧ-BDDAK39能有效表达,表达量为(32±5)ng·10~6细胞^-1·24h^(-1).这为利用此靶向表达载体进行血友病A的基因治疗提供了重要的实验依据.
刘雄昊刘慕君佘华文路薛志刚梁德生蔡芳潘乾龙志高邬玲阡戴和平夏昆夏家辉
关键词:靶向表达核糖体基因改造型打靶载体纤维肉瘤
Silica nanoparticle is a possible safe carrier for gene therapy被引量:2
2005年
In order to develop a safe and effective gene therapy carrier, some toxicological and biodynamical ex- periments were carried out on silica nanoparticles (SiNPs). First we prepared SiNPs with appropriate portions of cyclo- hexane, deionized water and ethyl silicate, and then trans- fected the modified SiNPs and GFP plasmid DNA complex into the HT1080 cells to test the effectiveness of transfection for gene therapy. At the same time, we injected the SiNPs into a number of mice through tail vein. Then we made the mice crossed to evaluate the acute, long-term and reproduc- tive toxicity. In vivo distribution analysis and pathological examination were made on both adult mice and their off- spring. SiNPs were uniform and had an average diameter of 40 nm, and the modified SiNPs carried exogenous DNA molecules into target cells and the transferred GFP fusion gene was effectively expressed in the cells. The SiNPs injected via tail vein were widely distributed in almost all of tissues, and the injected mice had the ability to reproduce normally. The in vivo and in vitro results of this study clearly show that SiNPs can be used as a safe and effective carrier for gene transfection and gene therapy.
XUE ZhigangLIANG DeshengLI YumeiLONG ZhigaoPAN QianLIU XionghaoWU LingqianZHU ShaihongCAI FangDAI HepingTANG BaishaXIA KunXIA Jiahui
关键词:硅石毒物学
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