The loss of dopaminergic neurons in DEC1 deficient mice potentially involves the decrease of PI3K/Akt/GSK3β signaling

The loss of dopaminergic neurons in DEC1 deficient mice potentially involves the decrease of PI3K/Akt/GSK3β signaling
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DEC1 缺陷小鼠中多巴胺能神经元的丧失可能涉及 PI3K/Akt/GSK3β 信号传导的减少

DOI:
10.18632/aging.102599
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发表时间:
2019-12
期刊:
aging
影响因子:
--
通讯作者:
Yang J
Yang J
中科院分区:
其他
文献类型:
--
作者:
Zhu Zhu;Wu Y;Zhang Z;Ge D;Lu M;Liu W;Shan E;Hu G;Hiroaki H;Yang J

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在这里,我们研究了分化胚胎软骨细胞基因1(DEC 1)缺陷的影响中脑多巴胺(DA)神经元在黑质pars延髓(SNpc)通过行为学,组织学和分子分析。我们发现,与年龄匹配的WT小鼠相比,DEC 1缺陷小鼠的自发活动和运动协调能力下降,这显示了帕金森病(PD)的主要特征。但WT和DEC 1基因敲除小鼠的空间学习记忆能力无显著差异。与年龄匹配的WT小鼠相比,DEC 1缺陷小鼠表现出SNpc中DA神经元的损失和纹状体中多巴胺及其代谢物的减少。与年龄匹配的WT小鼠相比,6月龄和12月龄DEC 1 KO小鼠SNpc中活化的caspase-3和TH/TUNEL+细胞增加。但在6月龄时,上述两种小鼠海马区均未发现NeuN/TUNEL+细胞增多。此外,DEC 1缺陷导致PI 3 K/Akt/GSK 3 β信号通路的显著抑制。此外,LiCl可挽救6月龄DEC 1基因敲除小鼠中脑DA能神经元的丢失。综上所述,DEC 1缺陷小鼠中DA神经元的损失可能涉及PI 3 K/Akt/GSK 3 β信号转导的下调。
Here we study the effects of differentiated embryonic chondrocyte gene 1(DEC1) deficiency on midbrain dopaminergic(DA) neurons in the substantia nigra pars compacta(SNpc) through behavioral, histological and molecular analysis. We have found that compared to the age-matched WT mice, DEC1 deficient mice show a decrease in locomotor activity and motor coordination, which shows the main features of Parkinson’s disease(PD). But there is no significant difference in spatial learning and memory skills between WT and DEC1 KO mice. Compared to the age-matched WT mice, DEC1 deficient mice exhibit the loss of DA neurons in the SNpc and reduction of dopamine and its metabolites in the striatum. The activated caspase-3 and TH/TUNEL+ cells increase in the SNpc of 6- and 12-month-old DEC1 KO mice compared to those of the age-matched WT mice. But we haven't found any NeuN/TUNEL+ cell increase in the hippocampus of the above two types of mice at the age of 6 months. Furthermore, DEC1 deficiency leads to a significant inhibition of PI3K/Akt/GSK3β signaling pathway. Additionally, LiCl could rescue the DA neuron loss of midbrain in the 6-month-old DEC1 KO mice. Taken together, the loss of DA neurons in the DEC1 deficient mice potentially involves the downregulation of PI3K/Akt/GSK3β signaling.
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