High-proportion differentiation of neural stem cells into neurons and formation of neural networks induced by active biomaterial scaffolds in vitro
10.3969/j.issn.2095-4344.0476
- VernacularTitle:活性生物材料支架体外诱导神经干细胞向神经元高比例分化并形成神经网络
- Author:
Ying LI
1
;
Ai-Feng ZHANG
;
Yu-Dan GAO
;
Wen ZHAO
;
Hong-Mei DUAN
;
Peng HAO
;
Jun-Kui SHANG
;
Zhao-Yang YANG
;
Xiao-Guang LI
Author Information
1. 首都医科大学神经生物学系
- From:
Chinese Journal of Tissue Engineering Research
2018;22(9):1432-1437
- CountryChina
- Language:Chinese
-
Abstract:
BACKGROUND: Either good biocompatibility and biological activity of active biological materials or the potential of multidirectional differentiation of neural stem cells has great application prospect and value. OBJECTIVE: To investigate the effect of neurotrophic factor 3-chitosan active biomaterial scaffolds on the differentiation of neural stem cells and the expression of key proteins of the neurotrophic factor 3 signal pathway in vitro. METHODS: The neural stem cells were extracted and purified, and then divided into pure culture medium group, soluble neurotrophic factor 3 group, pure chitosan group, and neurotrophic factor 3-chitosan group for differentiation induction. The expression of TrkC, Akt / p-Akt and Erk/p-Erk in the neurotrophic factor 3 signaling pathway was detected by western blot after 6 hours of induction. After 7 days of induction, differentiation of neural stem cells was observed by immunocytochemistry of MAP2, MBP, and GFAP. After 14 days of induction, formation of neural network induced by neurotrophic factor 3-chitosan active biomaterials was observed by immunocytochemistry of MAP2, Synapsin-1, and PSD95. RESULTS AND CONCLUSION: The neurotrophic factor 3-chitosan group induced a high proportion of neural stem cells differentiated into neurons, with a ratio of 73.8%, which was significantly higher than that in the other three groups. Meanwhile, the proportion of cells differentiated into glial cells waslower than that in the other three groups. The expression of key proteins TrkC, p-Akt and p-Erk in the neurotrophic factor 3-chitosan group was higher than that in the other three groups. Meanwhile, neurotrophic factor 3-chitosan could induce the in vitro differentiation of neural stem cells to form neural network.
