中国寄生虫学与寄生虫病杂志 ›› 2013, Vol. 31 ›› Issue (6): 18-487-489.

• 研究简报 • 上一篇    下一篇

短寡核苷酸链高效转染体外培养恶性疟原虫的研究

周洪昌,高宇辉,邵圣文,张慧,张婷   

  1. 1 湖州师范学院医学院病原生物与免疫学教研室,湖州 313000;2 中国医学科学院基础医学研究所,北京协和医学院基础学院微生物与寄生虫学系,北京 100005
  • 出版日期:2013-12-30 发布日期:2014-02-28

Evaluation of Transfection Effectiveness Using Fluorescein-labelled Oligonucleotides and Entraster-R siRNA Transfection into Plasmodium falciparum

ZHOU Hong-chang, GAO Yu-hui, SHAO Sheng-wen, ZHANG Hui, ZHANG Ting   

  1. 1 Department of Pathogen Biology & Immunology, Faculty of Medicine, Huzhou Teachers College, Huzhou 313000, China; 2 Department of Microbiology and Parasitology, School of Basic Medicine, Peking Union Medical College, Beijing 100005, China
  • Online:2013-12-30 Published:2014-02-28

摘要: 5%山梨醇连续2次同步化恶性疟原虫培养物(8 h窗口),培养16 h后,直接孵育组(A组)将50 μl含寡核苷酸培养基与450 μl恶性疟原虫培养物(5%虫血率,1%血压积)混合孵育,Entranster-R试剂转染组(B组)将50 μl转染复合物(含寡核苷酸链和转染试剂)与450 μl恶性疟原虫培养物混合孵育,培养5 h后重悬,分别取出250 μl,1 500×g离心3 min,收集沉淀,进行荧光显微镜观察和流式细胞术检测转染效率。剩余细胞经RPMI 1640培养基洗涤1次后,加入500 μl含2%新鲜红细胞的培养基,继续培养12 h至第2个细胞周期,再次进行流式细胞术检测。荧光显微镜观察结果显示,Entranster-R试剂转染组可明显观察到感染红细胞中标记探针的绿色荧光,而直接孵育组未观察到绿色荧光。流式细胞术检测结果表明,Entranster-R试剂转染组小分子寡核苷酸转染疟原虫的效率可达(47.40±3.39)%,高于普通孵育法[(0.60±0.27)%],且该组在第2个周期中维持转染率约(26.85±2.90)%,而直接孵育组在第2个细胞周期则几乎检测不到。提示利用纳米转染试剂Entranster-R能提高寡核苷酸转染疟原虫的效率。

关键词: 恶性疟原虫, Entranster-R转染, 寡核苷酸链

Abstract:  The cultured Plasmodium falciparum parasites were synchronized twice by 5% sorbitol treatment twice(8-hour window), and then incubated at 37 ℃ for 16 h. Parasites were transfected with fluorescein-labelled oligonucleotides (group A) or fluorescein-labelled oligonucleotides+Entranster-R siRNA transfection reagent (group B). After 5 h a part of parasites was evaluated by fluorescence microscopy and flow cytometry. The rest of parasites were washed with RPMI 1640 medium, and then incubated with 500 μl new medium containing 2% fresh erythrocytes for another 12 h, and detected by flow cytometry. The fluorescein-labelled oligonucleotides were localized in erythrocytes in group B, but nearly no fluorescence was observed for group A. Flow cytometry analysis indicated that the transfection efficiency of group B [(47.40±3.39)%] was higher than that of group A [(0.60±0.27)%]. In the second cell cycle, the transfection efficiency in group B was (26.85±2.90)%, while that of group A was nearly zero. The results indicated that Entranster-R siRNA transfection reagent may increase the oligonucleotides transfection efficiciency.

Key words: Plasmodium falciparum, Transfection, Oligonucleotides