胞内cAMP浓度的增加可诱导骨髓间质干细胞分化为神经元样细胞

目的:探讨胞内cAMP浓度的增加与骨髓间质干细胞 (MSC)分化为神经元样细胞的关系。方法:采用Ficoll-Paque液 (1077g/L)离心分离成人MSC,体外扩增,采用含腺苷酸环化酶激动剂Forskolin及磷脂酶抑制剂 3-异丁基-1-甲基黄嘌呤 (IBMX)的无血清DMEM诱导MSC分化为神经元。免疫组化鉴定神经元烯醇化酶 (NSE)、神经丝蛋白 (NF)、胶质纤维酸性蛋白 (GFAP)的表达。结果:成人骨髓间质干细胞在体外扩增原代可获得 5×10⁵,10代可获得 2×10¹⁰ 个细胞。加入Forskolin、IBMX以及两者联用诱导后,MSC胞体收缩,突起伸出,呈典型神经元样形态;免疫组化显示诱导出的神经元样细胞NSE、NF-M表达阳性,GFAP阴性。结论:胞内cAMP浓度的增加可诱导成人骨髓间质干细胞分化为神经元样细胞.

Human mesenchymal stem cells differentiate into neuron-like cells by increase in intracellular cyclic AMP

AIM: To investigate the differentiation from human mesenchymal stem cells(hMSC) into neuron-like cells by the increase in intracellular cyclic AMP. METHODS: hMSC were separated from human marrow with Ficoll-Paque reagent and expanded in culture medium. hMSC were induced to differentiate into neurons with Forskolin and 3-isobutyl-1-methyl-xanthine (IBMX). Neuron-specific enolase(NSE), neurofilament(NF), glial fibrillary acaidic protein(GFAP) were detected by immunohistochemistry. RESULTS: hMSC were expanded as undifferentiated cells in culture for more than 10 passages. Forskolin/IBMX can induce hMSC to exhibit a neuronal phenotype, expressing NSE and NF-M in 5 hours. But the neuron-like cells didn't express the glial astrocyte marker GFAP. CONCLUSION: hMSC can be induced to differentiate into neurons by increase in the intracellular cAMP.