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| 1 | 丹参酮Ⅱ联合骨髓间充质干细胞移植促进脑梗死后的神经再生显示文摘背景:有研究表明,丹参酮Ⅱ能改善微循环,扩张脑血管,增加脑血流量,降低脑梗死面积,改善脑梗死后造成的脑功能代谢障碍。目的:观察丹参酮Ⅱ联合骨髓间充质干细胞移植对大鼠脑梗死后受损神经再生的影响。方法:采用线栓法制作急性脑梗死大鼠模型,进行丹参酮Ⅱ联合骨髓间充质干细胞移植,并设骨髓间充质干细胞移植组和模型组进行对比。采用Longa评分进行神经运动功能的评定;采用RT-PCR法检测大鼠脑梗死区周围脑源性神经营养因子基因的表达;采用TUNEL法检测大脑梗死区细胞凋亡情况;利用免疫组织化学检测梗死灶周围皮质Nogo-A和Ng R蛋白的表达。结果与结论:(1)Longa评分、凋亡指数、Nogo-A和Ng R蛋白表达:联合组<骨髓间充质干细胞移植组<模型组(P<0.05);(2)脑源性神经营养因子基因表达:联合组>骨髓间充质干细胞移植组>模型组(P<0.05);(3)结果证实,丹参酮Ⅱ联合骨髓间充质干细胞移植可通过抑制梗死区Nogo-A和Ng R蛋白的表达,促进脑源性神经营养因子基因的表达,促进神经功能恢复,促进脑梗死后神经再生。 | 卢乙众 李合华 卢奕帆 | 2016 | 中国组织工程研究2016,20,23: | 10 |
| 2 | visual bone marrow mesenchymal stem cell transplantation in the repair of spinal cord injury显示文摘An important factor in improving functional recovery from spinal cord injury using stem cells is maximizing the number of transplanted cells at the lesion site. Here, we established a contusion model of spinal cord injury by dropping a weight onto the spinal cord at T7–8. Superparamagnetic iron oxide-labeled bone marrow mesenchymal stem cells were transplanted into the injured spinal cord via the subarachnoid space. An outer magnetic field was used to successfully guide the labeled cells to the lesion site. Prussian blue staining showed that more bone marrow mesenchymal stem cells reached the lesion site in these rats than in those without magnetic guidance or superparamagnetic iron oxide labeling, and immunofluorescence revealed a greater number of complete axons at the lesion site. Moreover, the Basso, Beattie and Bresnahan(BBB) locomotor rating scale scores were the highest in rats with superparamagnetic labeling and magnetic guidance. Our data confirm that superparamagnetic iron oxide nanoparticles effectively label bone marrow mesenchymal stem cells and impart sufficient magnetism to respond to the external magnetic field guides. More importantly, superparamagnetic iron oxide-labeled bone marrow mesenchymal stem cells can be dynamically and non-invasively tracked in vivo using magnetic resonance imaging. Superparamagnetic iron oxide labeling of bone marrow mesenchymal stem cells coupled with magnetic guidance offers a promising avenue for the clinical treatment of spinal cord injury. | Rui-ping Zhang Cheng Xu Yin Liu Jian-ding Li Jun Xie | 2015 | Neural Regeneration Research2015,10,3: | 4 |
| 3 | ADC值在兔脑与脊髓实验模型应用的研究显示文摘目的获取兔神经系统脑和脊髓不同区域和节段的表观弥散系数值(apparent diffusion coefficient,ADC值),观察上述区域ADC值的范围,探讨兔脑和脊髓ADC值的变化规律。方法采用12只普通级新西兰家兔,用弥散加权成像(diffusion-weighted imaging,DWI)序列分别扫描兔脑皮质区、脑白质区、中脑、脑桥、小脑、延髓以及颈1至腰3各椎体水平的脊髓,获取上述区域正常的ADC值。结果兔脑和脊髓正常ADC值的范围是0.763×10-3 mm/s-1.56×10-3 mm/s。结论磁共振DWI序列可以用于兔神经系统的检查。在受检区域中,兔小脑区的ADC值最低。兔脑部的ADC值略低于兔脊髓的ADC值。 | 崔传禹 王田蔚 雷杰 牛猛 程艳华 耿长帅 | 2016 | 中国实验诊断学2016,20,11: | 0 |
| 4 | 体外磁共振观察胎鼠神经干细胞的标记显示文摘背景:神经干细胞移植后的细胞存活、识别和迁移需动态监控。目的:通过体外磁共振技术对胎鼠神经干细胞体外标记,为神经干细胞在神经系统修复中的应用提供依据。方法:采用胎鼠神经干细胞的分离与培养标记、染色剂鉴定及神经干细胞的活性检测,构建大鼠脑缺血再灌注模型,采用超顺磁性氧化铁颗粒体外标记胎鼠的神经干细胞并移植至模型大鼠左侧脑内,未标记的胎鼠神经干细胞移植至右侧脑中,对标记的细胞进行普鲁士蓝染色,观察其定植和迁移情况,并通过磁共振示踪动态的监测神经干细胞在活体移植之后的信号改变情况。结果与结论:超顺磁性氧化铁颗粒体外标记胎鼠神经干细胞的方法效率达95%以上,电镜结果显示超顺磁性氧化铁颗粒体外标记胎鼠的神经干细胞内含铁颗粒,且集中在溶酶体和内涵体当中,磁共振结果显示胎鼠标记的神经干细胞呈现低信号改变,细胞活性的影响与未标记组差异无显著性意义,但标记的胎鼠神经干细胞T2WI与T2*WI信号降低。证实超顺磁性氧化铁颗粒体外标记胎鼠的神经干细胞可高效表达,磁共振的监控可以用于神经干细胞的活体示踪。 | 郑兆凤 王荣芳 王琦 | 2015 | 中国组织工程研究2015,19,32: | 0 |
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