胰岛素样生长因子1对缺血缺氧神经元的保护及其与PI3K信号转导通路的关系

目的:观察胰岛素样生长因子-1( insulin like growth factor 1, IGF-1)对缺氧缺糖神经元的保护作用并探讨其可能的作用机制.方法:构建体外培养的神经元氧糖剥夺模型(oxygen and glucose deprivation, OGD),第7天将培养的神经元分为8组(4组暴露于氧糖剥夺,...

Protective effects of IGF-1 on neurons under condition of hypoxia and the role of PI3K signal pathway

Objective To investigate the protective effects of insulin like growth factor 1(IGF-1) on cortical neurons under condition of hypoxia and the possible mechanism. Methods Cerebral cortical neurons from newborn rats were cultured under the condition of oxygen and glucose deprivation (OGD) . On day 7, neurons were treated with IGF-1 or IGF-1 plus LY294002 or PD98059 under condition of OGD or normal condition. MTT assay was used to analyze the viability of neurons in each group. The expression of total Akt and p-Akt were analyzed by Western blot. Results Compared with the control, the neuron viability was significantly higher in IGF-1 treated group under normal or OGD condition (P＜0.05). The protective effects of IGF-1 were attenuated in the presence of LY294002 but not PD98059. The result of Western blot showed IGF-1 upregulated the expression of p-Akt, which was inhibited by LY294002. Conclusion PI3K pathway may play an important role in neuroprotection afforded by IGF-1.