Small peptide inhibitor of JNK3 protects dopaminergic neurons from MPTP induced injury via inhibiting the ASK1-JNK3 signaling pathway.

Small peptide inhibitor of JNK3 protects dopaminergic neurons from MPTP induced injury via inhibiting the ASK1-JNK3 signaling pathway.
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JNK3 小肽抑制剂通过抑制 ASK1-JNK3 信号通路保护多巴胺能神经元免受 MPTP 诱导的损伤

DOI:
10.1371/journal.pone.0119204
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发表时间:
2015
期刊:
影响因子:
3.7
通讯作者:
Chen SD
Chen SD
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Pan J;Li H;Zhang B;Xiong R;Zhang Y;Kang WY;Chen W;Zhao ZB;Chen SD

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ASK1-JNK3信号通路在帕金森病(PD)的发病机制中起着关键作用。β-arrestin2与JNK3的特异性结合是激活ASK1-JNK3级联反应的关键,有望成为防止帕金森病患者多巴胺能神经元死亡的潜在治疗靶点。这项研究的目的是确定一种新的策略来预防帕金森病患者的多巴胺能神经元死亡。根据β-arrestin2与JNK3的特异性结合,合成了一个含有21个氨基酸的融合多肽,命名为JNK3-N-TAT。我们在体内外评价了该多肽抑制β-arrestin2与JNK3靶向结构域结合的能力。JNK3-N-TAT多肽通过破坏β-arrestin2和JNK3之间的相互作用来抑制ASK1-JNK3级联反应的激活。JNK3-N-Tat通过JNK3下游通路发挥有益作用,改善线粒体功能,从而减轻MPP+/MPTP诱导的损伤。JNK3-N-TAT对MPTP诱导的中脑多巴胺能神经元的保护作用。JNK3-N-TAT是一种JNK3抑制肽,通过抑制ASK1-JNK3信号通路,保护多巴胺能神经元免受MPP+/MPTP损伤。
The ASK1-JNK3 signaling pathway plays a pivotal role in the pathogenesis of Parkinson's disease (PD). The specific binding of β-arrestin2 to JNK3 is essential for activation of the ASK1-JNK3 cascade, representing a potential therapeutic target for preventing dopaminergic neuronal death in PD. The aim of this study was to identify a novel strategy for the prevention of dopaminergic neuronal death in PD. Based on the specific binding of β-arrestin2 to JNK3, a 21-amino-acid fusion peptide, termed JNK3-N-Tat, was synthesized. We evaluated the ability of this peptide to inhibit the binding of β-arrestin2 to its target domain in JNK3 in vitro and in vivo. The JNK3-N-Tat peptide inhibited activation of the ASK1-JNK3 cascade by disrupting the interaction between β-arrestin2 and JNK3. JNK3-N-Tat exerted beneficial effects through pathways downstream of JNK3 and improved mitochondrial function, resulting in attenuated MPP+/MPTP-induced damage. JNK3-N-Tat protected mesencephalic dopaminergic neurons against MPTP-induced toxicity. JNK3-N-Tat, a JNK3-inhibitory peptide, protects dopaminergic neurons against MPP+/MPTP-induced injury by inhibiting the ASK1-JNK3 signaling pathway.
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