TFP5 peptide, derived from CDK5-activating cofactor p35, provides neuroprotection in early-stage of adult ischemic stroke.

TFP5 peptide, derived from CDK5-activating cofactor p35, provides neuroprotection in early-stage of adult ischemic stroke.
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TFP5 肽源自 CDK5 激活辅因子 p35,可在成人缺血性中风的早期阶段提供神经保护。

DOI:
10.1038/srep40013
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发表时间:
2017-01-03
期刊:
影响因子:
4.6
通讯作者:
Hu YF
Hu YF
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Ji YB;Zhuang PP;Ji Z;Wu YM;Gu Y;Gao XY;Pan SY;Hu YF

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细胞周期蛋白依赖性激酶5(CDK 5)是一种多方面的蛋白质,在中枢神经系统中发挥重要作用。大量证据表明,CDK 5过度活化与缺血性卒中后神经元凋亡和死亡相关。在缺血期间,当其辅因子p35裂解成p25时,CDK 5活性增加。理论上,CDK 5/p25活性的抑制或p25的减少将是神经保护性的。TFP 5是一种由p35基因修饰的24-aa多肽(Lys 254-Ala 277),在体内可有效抑制CDK 5的过度活化,改善阿尔茨海默病和帕金森病的预后。在这里,我们发现,腹腔注射TFP 5显着减少缺血性中风大鼠早期阶段的缺血面积。相对于对照组,用TFP 5处理的大鼠显示出减少的兴奋性毒性、神经炎症、凋亡、星形胶质细胞损伤和血脑屏障破坏。我们的研究结果表明,TFP 5可能作为一个潜在的治疗急性成人缺血性中风的候选人。
Cyclin-dependent kinase 5 (CDK5) is a multifaceted protein shown to play important roles in the central nervous system. Abundant evidence indicates that CDK5 hyperactivities associated with neuronal apoptosis and death following ischemic stroke. CDK5 activity increases when its cofactor p35 cleaves into p25 during ischemia. Theoretically, inhibition of CDK5/p25 activity or reduction of p25 would be neuroprotective. TFP5, a modified 24-aa peptide (Lys254-Ala277) derived from p35, was found to effectively inhibit CDK5 hyperactivity and improve the outcomes of Alzheimer’s disease and Parkinson’s disease in vivo. Here, we showed that intraperitoneal injection of TFP5 significantly decreased the size of ischemia in early-stage of adult ischemic stroke rats. Relative to controls, rats treated with TFP5 displayed reduced excitotoxicity, neuroinflammation, apoptosis, astrocytes damage, and blood-brain barrier disruption. Our findings suggested that TFP5 might serve as a potential therapeutic candidate for acute adult ischemic stroke.
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