Rapid and reversible knockdown of endogenous proteins by peptide-directed lysosomal degradation.

Rapid and reversible knockdown of endogenous proteins by peptide-directed lysosomal degradation.
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DOI:
10.1038/nn.3637
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发表时间:
2014-03
影响因子:
25
通讯作者:
Wang, Yu Tian
Wang, Yu Tian
中科院分区:
医学1区
文献类型:
--
作者:
Fan, Xuelai;Jin, Wu Yang;Lu, Jie;Wang, Jin;Wang, Yu Tian

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改变内源性蛋白质水平的快速和可逆的方法对于研究生物系统和开发治疗方法至关重要。在这里,我们描述了一种基于膜渗透靶向肽的方法,该方法通过分子伴侣介导的自噬在体外和体内快速可逆地敲低内源性蛋白。我们通过显示在神经元培养物中以剂量、时间和溶酶体活性依赖性方式用其各自的靶向肽有效敲除各种蛋白质,包括死亡相关蛋白激酶1(160 kDa)、支架蛋白PSD-95(95 kDa)和α-突触核蛋白(18 kDa),证明了该方法的特异性、有效性和普遍性。更重要的是,我们发现,当全身给予时,肽系统有效地敲低了完整大鼠大脑中的靶蛋白。我们的研究提供了一个强大而方便的研究工具来操纵内源性蛋白质水平,也可能导致开发基于蛋白质敲低的新型治疗方法来治疗各种人类疾病。
Rapid and reversible methods for altering the level of endogenous proteins are critically important for studying biological systems and developing therapeutics. Here, we describe a membrane permeable targeting peptide-based method that rapidly and reversibly knocks down endogenous proteins through chaperone-mediated autophagy in vitro and in vivo. We demonstrated the specificity, efficacy and generalizability of the method by showing efficient knockdown of various proteins including death associated protein kinase 1 (160kDa), scaffolding protein PSD-95 (95kDa) and α-synuclein (18kDa) with their respective targeting peptides in a dose-, time- and lysosomal activity-dependent manner in neuronal cultures. More significantly, we showed that when given systemically, the peptide system efficiently knocked down the targeted protein in the brain of intact rats. Our study provides a robust and convenient research tool to manipulate endogenous protein levels, and may also lead to the development of protein knockdown-based novel therapeutics for treating various human diseases.
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