目的研究神经元特异性启动子血小板源性生长因子-β(platelet derived growth factor-β,PDGF-β)介导的胰岛素样生长因子结合蛋白4(insulin-like growth factor binding protein 4,IGFBP4)转基因小鼠脑内神经元和神经胶质细胞分化情况。方法PCR扩增并测序鉴定PDGF-β启动子和IGFBP4 c DNA表达框的整合,Isotropic Fractionator细胞计数法分析海马少突胶质前体细胞比例,Western blotting法分析生后28 d小鼠海马等部位神经元和神经胶质细胞的分化、胰岛素样生长因子-1(insulin-like factor-1,IGF-1)受体通路激活以及细胞存活相关分子表达,Rotarod实验观察小鼠运动能力。结果 IGFBP4 c DNA稳定整合于小鼠基因组,转基因小鼠海马少突胶质前体细胞数目和成熟细胞髓磷脂碱性蛋白(myelin basic protein,MBP)均明显增多,神经元和星形胶质细胞标志物Neu N和胶质纤维酸性蛋白(glial fibrillary acidic protein,GFAP...
【英文摘要】
Objective To explore the neuronal and glial differentiation in the brain of the insulin-like growth factor binding protein 4( IGFBP4) transgenic mouse in which the gene was driven by a neuron-specific promoter platelet derived growth factor-β( PDGF-β).Methods The integrated expression cassette of PDGF-β promoter and IGFBP4 c DNA was identified using PCR and DNA sequencing.The proportion of oligodendrocyte precursors in the hippocampus was estimated via Isotropic Fractionator. Semi-quantitative analysis of n...
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