摘要
背景:壳聚糖生物材料能够诱导骨髓间充质干细胞向神经细胞分化,壳聚糖衍生物羧甲基壳聚糖是否也能够诱导骨髓间充质干细胞向神经细胞分化尚不清楚。目的:探讨羧甲基壳聚糖温敏凝胶对骨髓间充质干细胞向神经细胞分化的影响及其可能的机制。方法:取传至3代的大鼠骨髓间充质干细胞用不同质量浓度(0,50,100,150,200,500 g/L)羧甲基壳聚糖温敏凝胶浸提液培养,对照组不添加羧甲基壳聚糖温敏凝胶浸提液。MTT法检测不同质量浓度羧甲基壳聚糖温敏凝胶浸提液对骨髓间充质干细胞增殖的影响,Western blot检测150 g/L羧甲基壳聚糖温敏凝胶浸提液对骨髓间充质干细胞NSE、Nestin、GAFP、Vimentin、NF-M、MAP-2、β3-tubulin以及Notch通路信号分子Notch1,Jag1表达水平的影响。结果与结论:(1)羧甲基壳聚糖温敏凝胶浸提液促进骨髓间充质干细胞增殖,在质量浓度为150 g/L时,增殖率达到最高水平;(2)150 g/L羧甲基壳聚糖温敏凝胶组NSE、Nestin、GAFP、Vimentin、NF-M、MAP-2、β3-tubulin的蛋白表达水平明显高于对照组,表明羧甲基壳聚糖温敏凝胶能够诱导骨髓间充质干细胞向神经细胞分化;(3)羧甲基壳聚糖温敏凝胶组Notch1和Jag1的蛋白表达水平明显低于对照组,表明其在诱导分化过程中能抑制Notch信号通路的活性。
BACKGROUND: Chitosan biological materials can induce bone marrow mesenchymal stem cells to differentiate toward neurons. As a derivative of chitosan, carboxymethyl chitosan has a series of excellent properties. However, whether carboxymethyl chitosan can induce the neuronal differentiation of bone marrow mesenchymal stem cells remains unclear. OBJECTIVE: To investigate the effect of carboxymethyl chitosan thermosensitive hydrogel on the differentiation of bone marrow mesenchymal stem cells into neurons and the possible mechanism. METHODS: Passage 3 bone marrow mesenchymal stem cells from rats were selected and cultured in carboxymethyl chitosan thermosensitive hydrogel extracts in different concentrations(0, 50, 100, 150, 200, 500 g/L). Control cells were cultured in culture medium with no addition of carboxymethyl chitosan thermosensitive hydrogel extracts. MTT assay was performed to investigate the effects of different concentrations of carboxymethyl chitosan thermosensitive hydrogel extracts on bone marrow mesenchymal stem cell proliferation. Western blot assay was used to explore the effect of 150 g/L carboxymethyl chitosan thermosensitive hydrogel extracts on the expression of neuron-specific enolase, Nestin, Vimentin, NF-M, microtubule associated protein 2, glial fibrillary acidic protein, β3-tubulin, Notch1 and Jag1 protein. RESULTS AND CONCLUSION: MTT assay showed that carboxymethyl chitosan thermosensitive hydrogel promoted the cell proliferation, and the proliferation rate reached the peak at the concentration of 150 g/L. Western blot assay showed that the cells induced by 150 g/L carboxymethyl chitosan thermosensitive hydrogel extract had significant increases in neuron-specific enolase, Nestin, Vimentin, NF-M, microtubule associated protein 2, glial fibrillary acidic protein, and β3-tubulin protein expression, and obvious decreases in Notch1 and Jag1 protein expression in comparison with the control group. These results indicate that the carboxymethyl chitosan thermosensitive hydrogel induces rat bone marrow mesenchymal stem cells to differentiate toward neurons, and suppresses the activity of Notch signal pathway in the process of differentiation.
作者
李振江
徐晨阳
丁炳谦
魏新亭
高明
薛亚珂
刘红林
Li Zhen-jiang Xu Chen-yang Ding Bing-qian Wei Xin-ting Gao Ming Xue Ya-ke Liu Hong-lin(Department of Neurosurgery, Huaihe Hospital of Henan University, Kaifeng 475000, Henan Province, China Department of Neurosurgery, First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, Henan Province, China)
出处
《中国组织工程研究》
CAS
北大核心
2017年第18期2870-2875,共6页
Chinese Journal of Tissue Engineering Research
关键词
生物材料
壳聚糖
骨髓间充质干细胞
神经细胞
分化
信号通路
Chitosan
Bone Marrow
Mesenchymal Stem Cells
Cell Differentiation
Neurons
Tissue Engineering