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首页> 外文期刊>The European Journal of Neuroscience >Sciatic nerve regeneration in rats induced by transplantation of in vitro differentiated bone-marrow stromal cells.
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Sciatic nerve regeneration in rats induced by transplantation of in vitro differentiated bone-marrow stromal cells.

机译:体外分化的骨髓基质细胞移植诱导大鼠坐骨神经再生。

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Bone marrow stromal cells (MSCs) are multipotent stem cells that have the potential to differentiate into bone, cartilage, fat and muscle. We now demonstrate that MSCs can be induced to differentiate into cells with Schwann cell characteristics, capable of eliciting peripheral nervous system regeneration in adult rats. MSCs treated with beta-mercaptoethanol followed by retinoic acid and cultured in the presence of forskolin, basic-FGF, PDGF and heregulin, changed morphologically into cells resembling primary cultured Schwann cells and expressing p75, S-100, GFAP and O4. The MSCs were genetically engineered by transduction with retrovirus encoding green fluorescent protein (GFP), and then differentiated by treatment with factors described above. They were transplanted into the cut ends of sciatic nerves, which then responded with vigorous nerve fibre regeneration within 3 weeks of the operation. Myelination of regenerated fibers by GFP-expressing MSCs was recognized using confocal and immunoelectron microscopy. The results suggest that MSCs are able to differentiate into myelinating cells, capable of supporting nerve fibre re-growth, and they can therefore be applied to induce nerve regeneration.
机译:骨髓基质细胞(MSC)是多能干细胞,具有分化为骨骼,软骨,脂肪和肌肉的潜力。我们现在证明,MSC可以被诱导分化为具有雪旺细胞特征的细胞,能够引发成年大鼠的周围神经系统再生。先后用β-巯基乙醇和视黄酸处理的MSC在毛喉素,碱性FGF,PDGF和heregulin存在下进行培养,形态学上变为类似于原代培养的雪旺细胞并表达p75,S-100,GFAP和O4的细胞。通过编码绿色荧光蛋白(GFP)的逆转录病毒转导,对MSC进行了基因工程改造,然后通过上述因子的处理使其分化。将它们移植到坐骨神经切开的末端,然后在手术后3周内以强烈的神经纤维再生产生反应。使用共聚焦和免疫电子显微镜可以识别表达GFP的MSC对再生纤维的髓鞘形成。结果表明,MSC能够分化为髓鞘细胞,能够支持神经纤维的再生,因此可以被用于诱导神经再生。

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