携带小鼠noggin基因的重组腺病毒载体对人骨髓间充质干细胞的神经样诱导作用

Noggin induces human bone marrow-derived mesenchymal stem cells to differentiate into neural cells

目的观察noggin基因能否单独将人骨髓间充质干细胞诱导为神经细胞以成为挽救神经退行性病变的"种子细胞"。方法原代培养人骨髓间充质干细胞,分为对照组、空白载体转染的Ad组和含有noggin基因的腺病毒载体转染的Ad-noggin组,观察转染后48h、4、7、10d等时相点各组细胞的形态学变化并行统计学分析。结果2种载体皆可成功转染人骨髓间充质干细胞使其自发绿色荧光,但Ad组形态无显著变化,而Ad-noggin组细胞在转染后48h即可见少量细胞分化为神经样细胞,转染后4d可见神经样细胞数目增多且伸出少量神经细胞样突起,10d时分化的细胞明显增多。与转染后7d相比,Ad-noggin组转染10d时胞体直经和树突直径明显增加(P<0.05),但形态无改变。结论单独以含noggin基因的腺病毒载体转染人骨髓间充质干细胞可以使其向神经样细胞分化。

Objective To study whether noggin alone can induce human bone marrow mesenchymal stem cells （MSCs） to differentiate into neural cells for the treatment of neural degenerative diseases.Methods Human bone marrow MSCs were primarily cultured and then divided into control,Ad group of empty adenovirus vector and Ad-noggin group of adenovirus vector with noggin gene.Their morphological changes were observed with fluorescence microscopy and laser confocal microscopy,and the results of 48 h,4,7,10 d were analyzed with statistical methods.Results Both the vector made human bone marrow MSCs carry green fluorescence.Ad group didn’t show any morphological changes.While for Ad-noggin group,a few neural-like cells appeared in 48 h after transfection.The number of such cells was increased,and there were some neurites around the cells after 4 d.The cells amplified greatly after 10 d.Compared to those of 7 d after transfection,the soma and dendritic diameters of Ad-noggin group were significantly increased after 10 d （P0.05）,but there was no change in morphology.Conclusion Adenovirus vector with noggin gene alone induces human bone marrow MSCs to differentiate into neuron-like cells.