2型腺相关病毒转导人骨髓CD34+细胞与间充质干细胞

目的:探讨2型重组腺相关病毒(AAV2)载体能否有效转导人骨髓CD34 细胞与间充质干细胞。方法:构建、包装、纯化携带绿色荧光蛋白基因的2型重组腺相关病毒(rAAV22/GFP),转染骨髓CD34 造血干/祖细胞和间充质干细胞,转导后48 h在荧光显微镜下观察GFP的表达,并比较羟基脲(HU)处理前后rAAV2/GFP对CD34 细胞的转染效率。结果:rAAV2/GFP对CD34 细胞的转染效率为5.3%±1.7%。经羟基脲预处理后达13.2%±2.8%,rAAV2/GFP对间充质干细胞的转染效率为23%±3.6%。结论:rAAV2对间充质干细胞的转染效率高于骨髓CD34 细胞,羟基脲预处理可以明显提高rAAV2对CD34 细胞的转染效率。

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OBJECTIVE: To investigate the transduction efficiency of recombinant adeno-associated virus 2 ( rAAV2) in human bone marrow CD34+ hematopoietic stem/progenitor cells and mesenchyme stem cells. METHODS: The rAAV2 containing green fluorescent protein genes (rAAV2/GFP) were constructed, packaged and purified. CD34+ hematopoietic stem/progenitor cells and mesenchyme stem cells were infected with the rAAV2/GFP. After transduction for 48 hours, the expression of GFP was detected under fluorescence microscope. Furthermore, the transduction efficiency of AAV transduced CD34+ with hydroxyurea (HU) pretreatment and that of untreated were compared. RESULTS: GFP genes were expressed in 5.3% +/- 1.7% CD34+ cells. After pretreatment with HU, the expression of the GFP gene in CD34+ cells increased to 13.2% +/- 2.8%, and 23% +/- 3.6% mesenchyme stem cells expressed the GFP gene. Conclusion The transduction efficiency of mesenchyme stem cells is higher than that of CD34+ hematopoietic stem/progenitor cells. HU pretreatment can obviously increase the transduction efficiency of CD34+ hematopoietic stem/progenitor cells.