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JoVE Encyclopedia of Experiments
Neuroscience
电穿孔介导的小鼠背根神经节转染促进感觉轴突再生
电穿孔介导的小鼠背根神经节转染促进感觉轴突再生
Encyclopedia of Experiments
Neuroscience
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Encyclopedia of Experiments Neuroscience
Electroporation-Mediated Transfection of Mouse Dorsal Root Ganglia to Promote Sensory Axon Regeneration

电穿孔介导的小鼠背根神经节转染促进感觉轴突再生

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02:56 min
August 13, 2025
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Transcript

取一只麻醉的小鼠,其暴露的L4和L5背根神经节含有感觉神经元细胞体。

在

显微注射移液器中加载调节轴突再生的荧光团标记的 RNA 构建体和示踪染料。

将

混合物注入 DRG。

使用电穿孔电极,向 DRG 施加电脉冲。

这会破坏感觉神经元细胞体的膜,产生孔隙,使构建体能够进入细胞质,从而促进转染。

缝合切口并让小鼠恢复。

几天后,重新麻醉并固定小鼠。

在

左侧中线的外侧做一个切口。解剖肌肉以暴露坐骨神经。

压

碎神经以损伤感觉神经元轴突。用缝合结标记该部位。

缝合切口并让小鼠恢复。

转染的构建体在DRG感觉神经元细胞体中靶向mRNA,瞬时调节蛋白质产生,以增强损伤后的感觉轴突再生。

对于DRG注射,将DNA质粒或RNA寡核苷酸加载到玻璃毛细管移液器中。然后小心地将毛细管玻璃移液器的尖端插入 DRG。并使用细胞内显微注射分配系统逐渐注射 1 微升 DNA 质粒或 RNA 寡核苷酸溶液。

对于电穿孔,用电极轻轻捏住目标DRG,并用电穿孔系统施加5平方电脉冲。随后,闭合肌肉,然后用尼龙缝合线缝合皮肤层。DRG电穿孔后两三天,腹膜内麻醉小鼠,将其四肢粘在软木板上,沿中线向左侧0.5厘米处做一个1厘米的切口。

接下来,纵向切割肌肉,例如臀大肌和梨状肌。然后暴露坐骨大孔和坐骨切迹之间的坐骨神经段。用显微外科镊子压碎神经12秒,用尼龙神经外缝线标记压碎部位。然后,用尼龙缝合线闭合肌肉和皮肤层。

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