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磁共振报告基因FTH1慢病毒载体构建及其在人神经母细胞瘤细胞中的表达

, PP. 2338-2342

Keywords: FTH,慢病毒载体,磁共振报告基因,人神经母细胞瘤细胞?

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Abstract:

目的构建携带人铁蛋白重链多肽1(fevritinheavychaik1,FTH1)基因的慢病毒载体,并检测其在人神经母细胞瘤细胞(SK-N-SH)中的表达。方法以慢病毒为载体,将FTH1基因转入SK-N-SH细胞中。实验组(SK-N-SH-FTH1)、空载组(SK-N-SH-GFP)和空白组(SK-N-SH),均用含500μmol/L枸橼酸铁铵(FAC)的培养基培养并连续4次传代。CCK-8试剂检测细胞增殖活性;普鲁士蓝染色及透射电镜检测细胞聚铁效能;MR成像(MRI)观察T2WI信号变化;Westernblot检测FTH1表达情况。结果CCK-8试剂检测发现3组细胞未添加FAC培养时,其增殖能力无显著差异[实验组(0.99±0.03),空载组(0.99±0.02),空白组(0.98±0.05);P>0.05];然而,添加500μmol/LFAC后,其增殖能力[实验组(0.73±0.08),空载组(0.76±0.02),空白组(0.73±0.39)]均较前明显减低(P<0.05)。普鲁士蓝染色及透射电镜显示实验组细胞内聚集较多的铁颗粒;MR扫描显示在500μmol/LFAC培养条件下,实验组T2WI信号显著降低;Westernblot结果显示实验组FTH1表达,且经4次传代后仍持续稳定表达。结论成功构建携带FTH1基因的慢病毒载体,并证明FTH1在SK-N-SH细胞中长期稳定表达及聚铁能力。

References

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