Nervous System Stem Cells Research Center, Semnan University of Medical Sciences, Semnan, Iran.
Department of Medical Physics, Semnan University of Medical Sciences, Semnan, Iran.
Neurosci Lett. 2022 Jul 27;784:136765. doi: 10.1016/j.neulet.2022.136765. Epub 2022 Jun 28.
Bone marrow mesenchymal stem cells (BMSCs) have self-renewal ability while maintaining the proliferation facility. The BMSCs reproducing ability could affect by electromagnetic fields (EMFs) as a physical inducing factor. We focused on the EMF (400 µT, 75 Hz) exposed multi-potential BMSCs which differentiated and successfully implanted in the substantia nigra pars compacta (SNpc) of Parkinson's disease rat model. The purified BMSCs are exposed to sinusoidal and square waveform EMF (1 h/1 week or 7 h/1 day) then injected into the left SNpc of Parkinson's rats. To evaluate the morphology of EMF exposed BMSCs, the cresyl violet staining labeled the Nissl bodies. After evaluation of the rat's activity by behavioral tests (open-field and rotarod tests), the brains were obtained for the preparation of SNpc blocks and carry out the cresyl violet staining. Cell morphology proved most cell differentiation to neurons in the sinusoidal EMF groups. In the sinusoidal EMF exposure groups, large and small neurons were seen with apparent synapses. Although in the square EMF exposed groups some neurons were seen, most of the differentiated cells were astrocytes, microglia, and oligodendrocyte. The results confirmed an improvement in locomotors' activity of BMSC alone and sinusoidal EMF exposed groups. We presented a low-frequency EMF (75 Hz) to promote the capability of BMSC proliferation, differentiation to neurons and glial cells, and motor coordination activity in the treatment of hemiparkinsonian rats.
骨髓间充质干细胞(BMSCs)具有自我更新能力,同时保持增殖能力。BMSCs 的再生能力可能会受到电磁场(EMF)的影响,因为电磁场是一种物理诱导因素。我们专注于暴露于电磁场(400µT,75Hz)的多潜能 BMSCs,这些细胞分化后成功植入帕金森病大鼠模型的黑质致密部(SNpc)。纯化的 BMSCs 暴露于正弦波和方波电磁场(1 小时/1 周或 7 小时/1 天),然后注入帕金森病大鼠的左侧 SNpc。为了评估 EMF 暴露的 BMSCs 的形态,我们使用甲苯胺蓝染色标记 Nissl 体。在通过行为测试(旷场和转棒测试)评估大鼠的活动后,取出大脑用于制备 SNpc 块,并进行甲苯胺蓝染色。细胞形态学证明,在正弦波 EMF 组中,大多数细胞分化为神经元。在正弦波 EMF 暴露组中,可见大神经元和小神经元,并有明显的突触。尽管在方波 EMF 暴露组中也观察到一些神经元,但大多数分化的细胞是星形胶质细胞、小胶质细胞和少突胶质细胞。结果证实,BMSC 单独和正弦波 EMF 暴露组的运动活动得到改善。我们提出了一种低频 EMF(75Hz),以促进 BMSC 增殖、向神经元和神经胶质细胞分化以及治疗偏侧帕金森病大鼠的运动协调能力。
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