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首页> 外文期刊>Neural regeneration research >Chronic neuroprotective effects of low concentration lithium on SH-SY5Y cells: possible involvement of stress proteins and gene expression
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Chronic neuroprotective effects of low concentration lithium on SH-SY5Y cells: possible involvement of stress proteins and gene expression

机译:低浓度锂对SH-SY5Y细胞的慢性神经保护作用:可能涉及应激蛋白和基因表达

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To investigate the molecular mechanism underlying the neuroprotective effect of lithium on cells, in this study, we exposed SH-SY5Y cells to 0.5 mmol/L lithium carbonate (Li 2 CO 2 ) for 25-50 weeks and then detected the expression levels of some neurobiology related genes and post-translational modifications of stress proteins in SH-SY5Y cells. cDNA arrays showed that pyruvate kinase 2 (PKM2) and calmodulin 3 (CaM 3) expression levels were significantly down-regulated, phosphatase protein PP2A expression was lightly down-regulated, and casein kinase II (CK2), threonine/tyrosine phosphatase 7 (PYST2), and dopamine beta-hydroxylase (DBH) expression levels were significantly up-regulated. Besides, western blot analysis of stress proteins (HSP27, HSP70, GRP78 and GRP94) showed an over-expression of two proteins: a 105 kDa protein which is a hyper-phosphorylated isoform of GRP94, and a 108 kDa protein which is a phosphorylated tetramer of HSP27. These results suggest that the neuroprotective effects of lithium are likely related to gene expressions and post-translational modifications of proteins cited above.
机译:为了研究锂对细胞神经保护作用的分子机制,在这项研究中,我们将SH-SY5Y细胞暴露于0.5 mmol / L碳酸锂(Li 2 CO 2 )25-50周,然后检测一些神经生物学相关基因的表达水平以及SH-SY5Y细胞中应激蛋白的翻译后修饰。 cDNA阵列显示丙酮酸激酶2(PKM2)和钙调蛋白3(CaM 3)的表达水平明显下调,磷酸酶蛋白PP2A的表达轻微下调,酪蛋白激酶II(CK2),苏氨酸/酪氨酸磷酸酶7(PYST2) ),而多巴胺β-羟化酶(DBH)的表达水平明显上调。此外,对应激蛋白(HSP27,HSP70,GRP78和GRP94)的蛋白质印迹分析显示了两种蛋白的过表达:一种是105 kDa的蛋白,它是GRP94的超磷酸化同工型;另一种是108 kDa的蛋白是磷酸化的四聚体。 HSP27。这些结果表明锂的神经保护作用可能与上述基因表达和蛋白质的翻译后修饰有关。

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