miR-130b促进小鼠胚胎发育过程中大脑皮质神经元的迁移

目的通过胚胎在体电转染技术,在胚胎小鼠大脑皮质神经元中过表达miR-130b,探讨其对神经元迁移的影响。方法利用miR-130b过表达载体,在昆明小鼠E15.5胚胎大脑中电转染,并于E17.5处死母鼠,取胚胎进行冰冻切片,于荧光显微镜下观察阳性神经元的迁移情况。结果过表达miR-130b的小鼠胚胎,大脑皮质神经元的迁移速率上升,最终迁移到达MZ层的神经元占总阳性神经元的75.1%,远高于对照组的22.1%;且停留在VZ/SVZ层的神经元(7.9%)远低于对照组(69.3%)。结论 miR-130b在神经发育过程中能够促进神经元的迁移。在未来的研究中需要进一步探索其深层机制。

miR-130b accelerates the neuronal migration in the developing embryonic mice cortex

Objective To study the effects of miR-130b on the neuronal migration in the developing embryonic mice cortex.Methods Pregnancy E15.5 mice were selected and plasmid of miR-130b was injected into the lateral ventricle of the embryonic brain.Two days after eletroporation,murine embryos were collected and cut into frozon coronal slices,then surveyed the neuronal migration under the fluorescence microscope.Results The neuronal migration rates were higher in miR-130b overexpression embryonic cortex,of which 75.1％ eletroporated neurons migrated into MZ,compared with the 22.1％ in control group.On the contrary,only 7.9％ eletroporated neurons stayed in the VZ/ SVZ in the experimental group,compared with the 69.3％ in control group.Conclusions miR-130b accelerates the neuronal migration in the developing embryonic mice cortex,its regulational role is worth studying.