PINCH in the cellular stress response to tau-hyperphosphorylation.

PINCH in the cellular stress response to tau-hyperphosphorylation.
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DOI:
10.1371/journal.pone.0058232
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发表时间:
2013
期刊:
影响因子:
3.7
通讯作者:
Langford D
Langford D
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Ozdemir AY;Rom I;Kovalevich J;Yen W;Adiga R;Dave RS;Langford D

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特别有趣的是,新的富含半胱氨酸-组氨酸的蛋白(PINCH)是一种适应蛋白,我们的数据表明,在压力条件下,神经突延伸是必需的。我们之前的研究还报道,在人类免疫缺陷病毒(HIV)患者的大脑中,突触树突信号蛋白(如MAP2或synaptophysin)水平下降的神经元可以回忆起PINCH。目前的研究探讨了PINCH在神经退行性疾病中的潜在作用。质谱预测了PINCH与Tau和热休克反应成员的相互作用。我们的体外数据证实,PINCH与高磷酸化(hp) Tau和E3泛素连接酶(热休克-70相互作用蛋白的羧基端)结合。在诱导hp-Tau之前沉默PINCH可以更有效地清除积累的hp-Tau,这表明PINCH可能在稳定hp-Tau中发挥作用。hp-Tau的积累与20多种神经病理疾病有关,包括阿尔茨海默病(AD)、额颞叶痴呆(FTD)和人类免疫缺陷病毒脑炎(HIVE)。对HIVE、AD和FTD患者脑组织的分析显示,PINCH增加并与hp-Tau结合。这些研究揭示了AD和HIV交叉的新机制,并确定了PINCH是过度磷酸化Tau蛋白积累的一个促进因素。
Particularly interesting new cysteine- histidine- rich protein (PINCH) is an adaptor protein that our data have shown is required for neurite extension under stressful conditions. Our previous studies also report that PINCH is recalled by neurons showing decreased levels of synaptodendritic signaling proteins such as MAP2 or synaptophysin in the brains of human immunodeficiency virus (HIV) patients. The current study addressed potential role(s) for PINCH in neurodegenerative diseases. Mass spectrometry predicted the interaction of PINCH with Tau and with members of the heat shock response. Our in vitro data confirmed that PINCH binds to hyperphosphorylated (hp) Tau and to E3 ubiquitin ligase, carboxy-terminus of heat shock-70 interacting protein. Silencing PINCH prior to induction of hp-Tau resulted in more efficient clearance of accumulating hp-Tau, suggesting that PINCH may play a role in stabilizing hp-Tau. Accumulation of hp-Tau is implicated in more than 20 neuropathological diseases including Alzheimer's disease (AD), frontotemporal dementia (FTD), and human immunodeficiency virus encephalitis (HIVE). Analyses of brain tissues from HIVE, AD and FTD patients showed that PINCH is increased and binds to hp-Tau. These studies address a new mechanism by which AD and HIV may intersect and identify PINCH as a contributing factor to the accumulation of hyperphosphorylated Tau.
Pinch是直肠癌患者的独立预后因素,没有术前放疗,这是一项术前放射疗法的瑞典直肠癌试验。
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