神经发生
旁分泌信号
球体
PI3K/AKT/mTOR通路
间充质干细胞
细胞外基质
细胞生物学
信号转导
自愈水凝胶
蛋白激酶B
神经干细胞
细胞分化
干细胞
受体
化学
细胞培养
生物化学
生物
基因
遗传学
有机化学
作者
Jing He,Nihui Zhang,Yongfa Zhu,Rongrong Jin,Fang Wu
出处
期刊:Biomaterials
[Elsevier]
日期:2021-01-01
卷期号:265: 120448-120448
被引量:88
标识
DOI:10.1016/j.biomaterials.2020.120448
摘要
It is critical for the clinical success to take the anti-inflammatory function into consideration when integrating the neurogenesis into the nerve repair materials. To this aim, we prepared mesenchymal stem cell (MSC) spheroids-loaded collagen (Col) hydrogels with combined superior anti-inflammatory efficacy and neurogenic activity. The size of the MSC spheroids showed a strong modulation effect on both functions, and the MSC spheroids-100 sample exhibited the best neuronal and anti-inflammatory potentials. The observed dual functions were likely based on the elevated intrinsic cell-cell contacts and cell-extracellular matrix interactions from the MSC spheroids. MSC self-assembly as spheroids expedited the secretions of endogenous trophic factors and extracellular matrix (ECM), which was beneficial to drive neural stem cell differentiation into the neuronal lineage. In addition, the formation of the MSC spheroids secreted more amounts and types of cytokines as well as immunomodulatory paracrine factors to suppress LPS-induced inflammatory reaction. LC-MS/MS analysis further demonstrated that MSC spheroids contributed to the activation of neuroactive ligand-receptor interaction, thereby triggering downstream PI3K-Akt signal pathway, which was likely due to the acceleration of ECM-receptor interaction, gap junction and tight junction. Importantly, inhibiting Akt pathway significantly suppressed the neuronal differentiation, indicating that PI3K-Akt signal pathway was critically involved in the Col-MSC spheroid hydrogel mediated neuroprotection and neurogenesis. Such findings not only provided a simple approach for improving MSC-based therapies for neuron-related diseases, but also shed insight on understanding the underlying mechanisms of MSC-mediated neuronal differentiation.
科研通智能强力驱动
Strongly Powered by AbleSci AI