A Novel Mechanism of Spine Damages in Stroke via DAPK1 and Tau.

A Novel Mechanism of Spine Damages in Stroke via DAPK1 and Tau.
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中风中通过 DAPK1 和 Tau 造成脊柱损伤的新机制

DOI:
10.1093/cercor/bhv096
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发表时间:
2015-11
期刊:
Cerebral cortex (New York, N.Y. : 1991)
影响因子:
--
通讯作者:
Lu Y
Lu Y
中科院分区:
其他
文献类型:
--
作者:
Pei L;Wang S;Jin H;Bi L;Wei N;Yan H;Yang X;Yao C;Xu M;Shu S;Guo Y;Yan H;Wu J;Li H;Pang P;Tian T;Tian Q;Zhu LQ;Shang Y;Lu Y

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突触棘丢失是中风损伤的主要前期后果之一,但其潜在的分子机制仍不清楚。在此,我们报道在中风小鼠模型中,死亡相关蛋白激酶1(DAPK1)与微管相关蛋白Tau的直接相互作用导致突触棘丢失,进而引起神经元死亡。我们发现DAPK1使中风小鼠皮质神经元中的Tau蛋白在丝氨酸262位点(pS262)磷酸化。在小鼠中基因敲除DAPK1激酶结构域(KD)(DAPK1 - KD−/−),或者通过系统性应用一种膜透性肽阻断DAPK1 - Tau相互作用,均可保护突触棘免受损伤,并改善中风损伤后的神经功能。因此,阻断DAPK1 - Tau相互作用是中风临床治疗的一种有前景的策略。
Synaptic spine loss is one of the major preceding consequences of stroke damages, but its underlying molecular mechanisms remain unknown. Here, we report that a direct interaction of DAPK1 with Tau causes spine loss and subsequently neuronal death in a mouse model with stroke. We found that DAPK1 phosphorylates Tau protein at Ser262 (pS262) in cortical neurons of stroke mice. Either genetic deletion of DAPK1 kinase domain (KD) in mice (DAPK1-KD−/−) or blocking DAPK1-Tau interaction by systematic application of a membrane permeable peptide protects spine damages and improves neurological functions against stroke insults. Thus, disruption of DAPK1-Tau interaction is a promising strategy in clinical management of stroke.