The lack of curative therapies for neurodegenerative diseases has high economic impact and places huge burden on the society.The contribution of stem cells to cure neurodegenerative diseases has been unraveled and exp...The lack of curative therapies for neurodegenerative diseases has high economic impact and places huge burden on the society.The contribution of stem cells to cure neurodegenerative diseases has been unraveled and explored extensively over the past few years.Beyond substitution of the lost neurons,stem cells act as immunomodulators and neuroprotectors.A large number of preclinical and a small number of clinical studies have shown beneficial outcomes in this context.In this review,we have summarized the current concepts of stem cell therapy in neurodegenerative diseases and the recent advances in this field,particularly between 2010 and 2012.Further studies should be encouraged to resolve the clinical issues and vague translational findings for maximum optimization of the efficacy of stem cell therapy in neurodegenerative diseases.展开更多
Alginate scaffold has been considered as an appropriate biomaterial for promoting the differentiation of embryonic stem cells toward neuronal cell lineage. We hypothesized that alginate scaffold is suitable for cultur...Alginate scaffold has been considered as an appropriate biomaterial for promoting the differentiation of embryonic stem cells toward neuronal cell lineage. We hypothesized that alginate scaffold is suitable for culturing Wharton’s jelly mesenchymal stem cells（WJMSCs） and can promote the differentiation of WJMSCs into neuron-like cells. In this study, we cultured WJMSCs in a three-dimensional scaffold fabricated by 0.25% alginate and 50 m M Ca Cl2 in the presence of neurogenic medium containing 10 μM retinoic acid and 20 ng/m L basic fibroblast growth factor. These cells were also cultured in conventional two-dimensional culture condition in the presence of neurogenic medium as controls. After 10 days, immunofluorescence staining was performed for detecting β-tubulin（marker for WJMSCs-differentiated neuron） and CD271（motor neuron marker）. β-Tubulin and CD271 expression levels were significantly greater in the WJMSCs cultured in the three-dimensional alginate scaffold than in the conventional two-dimensional culture condition. These findings suggest that three-dimensional alginate scaffold cell culture system can induce neuronal differentiation of WJMSCs effectively.展开更多
背景:体外培养的脐带间充质干细胞在不同培养体系下生长状态差异显著,因此选取一种更适合的培养基相当必要。目的:对比观察人脐带间充质干细胞在3种培养基中的生长增殖情况,并检测细胞免疫表型以及间充质干细胞的诱导分化能力。方法:在...背景:体外培养的脐带间充质干细胞在不同培养体系下生长状态差异显著,因此选取一种更适合的培养基相当必要。目的:对比观察人脐带间充质干细胞在3种培养基中的生长增殖情况,并检测细胞免疫表型以及间充质干细胞的诱导分化能力。方法:在无菌条件下用贴块法收获人脐带间充质干细胞,用T75培养瓶培养传代后,取第3代脐带间充质干细胞分别种入到含体积分数为5%胎牛血清的DMEM/F12培养基、含体积分数为10%胎牛血清的DMEM/F12培养基和Mesen PRO RSTM培养基中,培养第1,3,5,7天进行细胞计数,绘制细胞生长曲线。采用流式细胞仪分析第3代脐带间充质干细胞免疫表型,并检测其成骨及成脂肪诱导分化能力。结果与结论:培养出的第3代人脐带间充质干细胞高表达CD44、CD73、CD90、CD105,不表达CD29、CD31、CD34、HLA-DR。经成脂诱导后,油红O染色可见胞浆中有大量红色小脂滴;成骨诱导后,茜素红染色后镜下可见成骨样细胞团,说明脐带间充质干细胞在体外具有多向分化的潜能。在倒置显微镜下观察可见含体积分数为10%胎牛血清的DMEM/F12培养基中的细胞集落密集,形态均匀,而其他2种培养基中的细胞集落密集程度和形态都不如前者好。在培养传代细胞时,可优先选择含体积分数为10%胎牛血清的DMEM/F12培养基。展开更多
文摘The lack of curative therapies for neurodegenerative diseases has high economic impact and places huge burden on the society.The contribution of stem cells to cure neurodegenerative diseases has been unraveled and explored extensively over the past few years.Beyond substitution of the lost neurons,stem cells act as immunomodulators and neuroprotectors.A large number of preclinical and a small number of clinical studies have shown beneficial outcomes in this context.In this review,we have summarized the current concepts of stem cell therapy in neurodegenerative diseases and the recent advances in this field,particularly between 2010 and 2012.Further studies should be encouraged to resolve the clinical issues and vague translational findings for maximum optimization of the efficacy of stem cell therapy in neurodegenerative diseases.
基金the research deputy of Shiraz University of Medical Sciences, Iran for offering student research grant (No. 5959)
文摘Alginate scaffold has been considered as an appropriate biomaterial for promoting the differentiation of embryonic stem cells toward neuronal cell lineage. We hypothesized that alginate scaffold is suitable for culturing Wharton’s jelly mesenchymal stem cells（WJMSCs） and can promote the differentiation of WJMSCs into neuron-like cells. In this study, we cultured WJMSCs in a three-dimensional scaffold fabricated by 0.25% alginate and 50 m M Ca Cl2 in the presence of neurogenic medium containing 10 μM retinoic acid and 20 ng/m L basic fibroblast growth factor. These cells were also cultured in conventional two-dimensional culture condition in the presence of neurogenic medium as controls. After 10 days, immunofluorescence staining was performed for detecting β-tubulin（marker for WJMSCs-differentiated neuron） and CD271（motor neuron marker）. β-Tubulin and CD271 expression levels were significantly greater in the WJMSCs cultured in the three-dimensional alginate scaffold than in the conventional two-dimensional culture condition. These findings suggest that three-dimensional alginate scaffold cell culture system can induce neuronal differentiation of WJMSCs effectively.
文摘背景:体外培养的脐带间充质干细胞在不同培养体系下生长状态差异显著,因此选取一种更适合的培养基相当必要。目的:对比观察人脐带间充质干细胞在3种培养基中的生长增殖情况,并检测细胞免疫表型以及间充质干细胞的诱导分化能力。方法:在无菌条件下用贴块法收获人脐带间充质干细胞,用T75培养瓶培养传代后,取第3代脐带间充质干细胞分别种入到含体积分数为5%胎牛血清的DMEM/F12培养基、含体积分数为10%胎牛血清的DMEM/F12培养基和Mesen PRO RSTM培养基中,培养第1,3,5,7天进行细胞计数,绘制细胞生长曲线。采用流式细胞仪分析第3代脐带间充质干细胞免疫表型,并检测其成骨及成脂肪诱导分化能力。结果与结论:培养出的第3代人脐带间充质干细胞高表达CD44、CD73、CD90、CD105,不表达CD29、CD31、CD34、HLA-DR。经成脂诱导后,油红O染色可见胞浆中有大量红色小脂滴;成骨诱导后,茜素红染色后镜下可见成骨样细胞团,说明脐带间充质干细胞在体外具有多向分化的潜能。在倒置显微镜下观察可见含体积分数为10%胎牛血清的DMEM/F12培养基中的细胞集落密集,形态均匀,而其他2种培养基中的细胞集落密集程度和形态都不如前者好。在培养传代细胞时,可优先选择含体积分数为10%胎牛血清的DMEM/F12培养基。
