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Neurotransplantation of magnetically labeled oligodendrocyte progenitors: Magnetic resonance tracking of cell migration and myelination

机译:磁性标记少突胶质细胞祖细胞的神经移植:细胞迁移和髓鞘形成的磁共振追踪

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摘要

Demyelination is a common pathological finding in human neurological diseases and frequently persists as a result of failure of endogenous repair. Transplanted oligodendrocytes and their precursor cells can (re)myelinate axons, raising the possibility of therapeutic intervention. The migratory capacity of transplanted cells is of key importance in determining the extent of (re)myelination and can, at present, be evaluated only by using invasive and irreversible procedures. We have exploited the transferrin receptor as an efficient intracellular delivery device for magnetic nanoparticles, and transplanted tagged oligodendrocyte progenitor cells into the spinal cord of myelin-deficient rats. Cell migration could be easily detected by using three-dimensional magnetic resonance microscopy, with a close correlation between the areas of contrast enhancement and the achieved extent of myelination. The present results demonstrate that magnetic resonance tracking of transplanted oligodendrocyte progenitors is feasible; this technique has the potential to be easily extended to other neurotransplantation studies involving different precursor cell types.
机译:脱髓鞘是人类神经系统疾病的常见病理发现,由于内源性修复失败而经常持续存在。移植的少突胶质细胞及其前体细胞可(重新)使轴突髓鞘化,从而增加了治疗干预的可能性。移植细胞的迁移能力对于确定(再)髓鞘化程度至关重要,目前只能通过使用侵入性和不可逆的程序进行评估。我们已经利用转铁蛋白受体作为磁性纳米颗粒的有效细胞内递送装置,并将标记的少突胶质细胞祖细胞移植到髓磷脂缺乏大鼠的脊髓中。通过使用三维磁共振显微镜可以很容易地检测到细胞迁移,在增强造影剂的区域与达到的髓鞘形成程度之间有着密切的联系。目前的结果表明移植的少突胶质祖细胞的磁共振跟踪是可行的。该技术有可能容易地扩展到涉及不同前体细胞类型的其他神经移植研究。

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