c-Jun N-terminal kinase has a key role in Alzheimer disease synaptic dysfunction in vivo.

c-Jun N-terminal kinase has a key role in Alzheimer disease synaptic dysfunction in vivo.
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DOI:
10.1038/cddis.2013.559
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发表时间:
2014-01-23
影响因子:
9
通讯作者:
--
中科院分区:
生物学1区
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--
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突触功能改变被认为是阿尔茨海默病(AD)的首要特征之一。目前,没有治疗可用于预防AD中兴奋性突触的功能障碍。识别突触病的关键调节剂在AD的治疗中具有特别重要的意义。我们在此描述了TgCRND 8小鼠中导致突触病的途径,并表明c-Jun N-末端激酶(JNK)在认知障碍发作前在脊柱处被激活。特异性抑制JNK及其特异性抑制肽D-JNKI 1可预防TgCRND 8小鼠的突触功能障碍。D-JNKI 1避免了突触后蛋白和谷氨酸受体从突触后密度的损失以及兴奋性突触大小的减小,从而恢复了它们的功能障碍。这组数据表明,JNK是AD突触损伤的关键信号通路,其特异性抑制提供了一种创新的治疗策略,以防止AD中的脊柱退变。
Altered synaptic function is considered one of the first features of Alzheimer disease (AD). Currently, no treatment is available to prevent the dysfunction of excitatory synapses in AD. Identification of the key modulators of synaptopathy is of particular significance in the treatment of AD. We here characterized the pathways leading to synaptopathy in TgCRND8 mice and showed that c-Jun N-terminal kinase (JNK) is activated at the spine prior to the onset of cognitive impairment. The specific inhibition of JNK, with its specific inhibiting peptide D-JNKI1, prevented synaptic dysfunction in TgCRND8 mice. D-JNKI1 avoided both the loss of postsynaptic proteins and glutamate receptors from the postsynaptic density and the reduction in size of excitatory synapses, reverting their dysfunction. This set of data reveals that JNK is a key signaling pathway in AD synaptic injury and that its specific inhibition offers an innovative therapeutic strategy to prevent spine degeneration in AD.
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