整合素连接激酶对脐带间充质干细胞向神经干细胞样细胞分化的作用

摘要

Objective To investigate the effect of integrin-linked kinase (ILK) on inducing mesenchymal stem cells (MSCs) to neuron stem-like cell in vitro. Methods MSCs isolated from umbilical cord were transfected with plasmid DNA encoding green fluorescent protein (GFP) and GFP-fusion ILK, wild and mutant, respectively;and cultured in serum-free media with basic fibroblast growth factor, epidermal growth factor and B27. It was assessed with the proliferative activity and the efficiency of differentiation into neural stem-like cell. Results MSCs transfected with GFP-fusion wild ILK expressed ILK and kinase-dead mutant ILK stably. The activity of proliferation increased and more of them differentiated into neural stem-like cell, which express CD133 and Nestin validated by PCR and Western blotting, and more of wild than of mutant. Conclusion Integrin-linked kinase may play a positive role in MSC differentiation into neural stem-like cell, which may associate with the activity of kinase.%目的：研究整合素连接激酶(ILK)对脐带间充质干细胞向神经干细胞样细胞分化的影响。方法分离人脐带间充质干细胞，用表达对照绿色荧光蛋白(GFP)和GFP融合野生型ILK、突变型ILK的质粒转染后，用含碱性成纤维细胞生长因子、表皮生长因子、B27的无血清培养基培养。检测间充质干细胞的增殖速度及向神经干细胞样细胞分化的效率。结果转染ILK的间充质干细胞中，ILK稳定表达，增殖速度加快，神经干细胞样细胞分化的效率提高；野生型ILK优于突变型ILK。结论 ILK促进间充质干细胞向神经干细胞样细胞分化。其作用机制与激酶活性有关。