首页> 外文期刊>Cell biology international. >Effect of FK506 and cyclosporine A on the expression of BDNF, tyrosine kinase B and p75 neurotrophin receptors in astrocytes exposed to simulated ischemia in vitro.
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Effect of FK506 and cyclosporine A on the expression of BDNF, tyrosine kinase B and p75 neurotrophin receptors in astrocytes exposed to simulated ischemia in vitro.

机译:FK506和环孢菌素A对星形胶质细胞体外模拟缺血后BDNF,酪氨酸激酶B和p75神经营养因子受体表达的影响。

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摘要

We investigated whether the immunosuppressive drugs, FK506 and cyclosporine A, increase BDNF protein and/or mRNA expression in ischemic astrocytes and if an increase could be related to changes in the nuclear expression of p-CREB, p-Erk1/2 and p-Akt. The influence of these immunosuppressants on protein and mRNA levels of TrkB and p75(NTR) receptors was also examined. On day 21, cultures of rat astrocytes were subjected to ischemic conditions simulated in vitro (combined oxygen glucose deprivation, OGD) for 8h and exposed to FK506 (10-1000nM) and cyclosporine A (0.25-10microM). FK506 and cyclosporine A (at 1000nM and 0.25microM, respectively) stimulated the expression and release of BDNF in cultured rat cerebral cortical astrocytes exposed to OGD. The immunosuppressants at these doses simultaneously increased p-CREB and p-Erk1/2 expression in the nuclear fraction of astrocytes. The results RT-PCR and Western blot analysis provided further evidence of a modulating influence of the drugs on the expression of trkB and p75(NTR) genes and their protein products in ischemic astrocytes.
机译:我们调查了免疫抑制药物FK506和环孢菌素A是否增加缺血星形胶质细胞中BDNF蛋白和/或mRNA表达,以及是否可能与p-CREB,p-Erk1 / 2和p-Akt核表达的变化有关。还检查了这些免疫抑制剂对TrkB和p75(NTR)受体的蛋白质和mRNA水平的影响。在第21天,将大鼠星形胶质细胞的培养物置于体外模拟的缺血条件下(合并氧葡萄糖剥夺,OGD)8小时,并使其暴露于FK506(10-1000nM)和环孢素A(0.25-10μM)。 FK506和环孢菌素A(分别为1000nM和0.25microM)刺激了暴露于OGD的培养大鼠大脑皮质星形胶质细胞中BDNF的表达和释放。这些剂量的免疫抑制剂同时增加星形胶质细胞核部分中的p-CREB和p-Erk1 / 2表达。结果RT-PCR和Western blot分析提供了进一步的证据,证明药物对缺血性星形胶质细胞中trkB和p75(NTR)基因及其蛋白产物的表达有调节作用。

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