The transcription factor XBP1s restores hippocampal synaptic plasticity and memory by control of the Kalirin-7 pathway in Alzheimer model.

The transcription factor XBP1s restores hippocampal synaptic plasticity and memory by control of the Kalirin-7 pathway in Alzheimer model.
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DOI:
10.1038/mp.2016.152
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发表时间:
2017-11
影响因子:
11
通讯作者:
Checler F
Checler F
中科院分区:
医学1区
文献类型:
--
作者:
Cissé M;Duplan E;Lorivel T;Dunys J;Bauer C;Meckler X;Gerakis Y;Lauritzen I;Checler F

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神经元网络功能障碍和认知能力下降是阿尔茨海默病(AD)最突出的特征,尽管导致这种损伤的机制尚未确定。在这里,我们报告说,病毒介导的交付的活性剪接转录因子X-Box结合蛋白1 s(XBP 1 s)在海马获救的脊椎密度,突触可塑性和记忆功能的AD小鼠模型。XBP 1 s转录激活Kalirin-7(Kal 7),一种控制突触可塑性的蛋白质。此外,我们发现在暴露于Aβ寡聚体的原代神经元、转基因小鼠模型和人类AD脑中Kal 7水平降低。短发夹RNA介导的Kal 7敲低改变了幼稚小鼠的突触可塑性和记忆形成。此外,内源性Kal 7的减少损害了XBP 1在阿尔茨海默病模型中的有益作用。因此,我们的研究结果表明,XBP 1 s是通过一种机制,使Kal 7通路与AD病理学的治疗意义的神经保护。
Neuronal network dysfunction and cognitive decline constitute the most prominent features of Alzheimer’s disease (AD), although mechanisms causing such impairments are yet to be determined. Here we report that virus-mediated delivery of the active spliced transcription factor X-Box binding protein 1s (XBP1s) in the hippocampus rescued spine density, synaptic plasticity and memory function in a mouse model of AD. XBP1s transcriptionally activated Kalirin-7 (Kal7), a protein that controls synaptic plasticity. In addition, we found reduced levels of Kal7 in primary neurons exposed to Aβ oligomers, transgenic mouse models and human AD brains. Short hairpin RNA-mediated knockdown of Kal7 altered synaptic plasticity and memory formation in naive mice. Further, reduction of endogenous Kal7 compromised the beneficial effects of XBP1s in Alzheimer’s model. Hence, our findings reveal that XBP1s is neuroprotective through a mechanism that engages Kal7 pathway with therapeutic implications in AD pathology.
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