Glial cell line-derived neurotrophic factor recombinant adenovirus vector-transfected bone marrow mesenchymal stem cells were induced to differentiate into neuron-like cells using inductive medium containing retinoic ...Glial cell line-derived neurotrophic factor recombinant adenovirus vector-transfected bone marrow mesenchymal stem cells were induced to differentiate into neuron-like cells using inductive medium containing retinoic acid and epidermal growth factor. Cell viability, micro- tubule-associated protein 2-positive cell ratio, and the expression levels of glial cell line-derived neurotrophic factor, nerve growth factor and growth-associated protein-43 protein in the su- pernatant were significantly higher in glial cell line-derived neurotrophic factor/bone marrow mesenchymal stem cells compared with empty virus plasmid-transfected bone marrow mes- enchymal stem cells. Furthermore, microtubule-associated protein 2, glial cell line-derived neurotrophic factor, nerve growth factor and growth-associated protein743 mRNA levels in cell pellets were statistically higher in glial cell line-derived neurotrophic factor/bone marrow mesen- chymal stem cells compared with empty virus plasmid-transfected bone marrow mesenchymal stem cells. These results suggest that glial cell line-derived neurotrophic factor/bone marrow mesenchymal stem cells have a higher rate of induction into neuron-like cells, and this enhanced differentiation into neuron-like cells may be associated with up-regulated expression of glial cell line-derived neurotrophic factor, nerve growth factor and growth-associated protein-43.展开更多
目的探讨骨髓间充质干细胞(MSCs)移植治疗脑缺血模型大鼠的时间窗及最佳移植时间点。方法雄性SD大鼠56只,随机分为移植组32只和对照组24只,在建立大鼠大脑中动脉缺血2 h再灌注模型后分为1、7、14、21 d 4个时间点。对大鼠进行改良神经...目的探讨骨髓间充质干细胞(MSCs)移植治疗脑缺血模型大鼠的时间窗及最佳移植时间点。方法雄性SD大鼠56只,随机分为移植组32只和对照组24只,在建立大鼠大脑中动脉缺血2 h再灌注模型后分为1、7、14、21 d 4个时间点。对大鼠进行改良神经功能缺损评分、HE染色、Bielshowsky Iuxol Fast Blue染色、直接免疫荧光染色和免疫组织化学染色。结果移植组1、7 d在移植14 d后,14、21 d在移植21 d后改良神经功能缺损评分明显低于对照组(P<0.05)。移植组1、7 d胶质纤维酸性蛋白阳性细胞数、突触素累计吸光度值、胼胝体面积明显高于对照组(P<0.05)。移植组1、7、14、21 d Ki-67阳性细胞数明显高于对照组(P<0.05)。移植组7 d神经元特异性烯醇酶累计吸光度值明显高于对照组(P<0.05)。移植组1、7 d Nogo A阳性细胞数明显低于对照组(P<0.05)。结论 MSCs移植治疗大鼠脑缺血模型的时间窗可延长至制模后的21 d,最佳移植时间点为制模后7 d。MSCs移植治疗脑梗死的作用机制可能与其促进内源性修复相关。展开更多
文摘Glial cell line-derived neurotrophic factor recombinant adenovirus vector-transfected bone marrow mesenchymal stem cells were induced to differentiate into neuron-like cells using inductive medium containing retinoic acid and epidermal growth factor. Cell viability, micro- tubule-associated protein 2-positive cell ratio, and the expression levels of glial cell line-derived neurotrophic factor, nerve growth factor and growth-associated protein-43 protein in the su- pernatant were significantly higher in glial cell line-derived neurotrophic factor/bone marrow mesenchymal stem cells compared with empty virus plasmid-transfected bone marrow mes- enchymal stem cells. Furthermore, microtubule-associated protein 2, glial cell line-derived neurotrophic factor, nerve growth factor and growth-associated protein743 mRNA levels in cell pellets were statistically higher in glial cell line-derived neurotrophic factor/bone marrow mesen- chymal stem cells compared with empty virus plasmid-transfected bone marrow mesenchymal stem cells. These results suggest that glial cell line-derived neurotrophic factor/bone marrow mesenchymal stem cells have a higher rate of induction into neuron-like cells, and this enhanced differentiation into neuron-like cells may be associated with up-regulated expression of glial cell line-derived neurotrophic factor, nerve growth factor and growth-associated protein-43.
