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Identification and characterization of DNA aptamers specific for phosphorylation epitopes of Tau protein
Journal of the American Chemical Society ( IF 14.4 ) Pub Date : 2018-10-02 , DOI: 10.1021/jacs.8b08645
I-Ting Teng 1 , Xiaowei Li 1 , Hamad Ahmad Yadikar 2 , Zhihui Yang 2 , Long Li 1 , Yifan Lyu 3 , Xiaoshu Pan 1 , Kevin K. Wang 2, 4 , Weihong Tan 1, 3
Affiliation  

Tau proteins are proteins that stabilize microtubules, but their hyperphosphorylation can result in the formation of protein aggregates and, over time, neurodegeneration. This phenomenon, termed tauopathy, is pathologically involved in several neurodegenerative disorders. DNA aptamers are single-stranded oligonucleotides capable of specific binding to target molecules. Using tau epitopes predisposed for phosphorylation, we identified six distinct aptamers that bind to tau at two phosphorylatable epitopes (Thr-231 and Ser-202) and to full-length Tau441 proteins with nanomolar affinity. In addition, several of these aptamers also inhibit tau phosphorylation (IT4, IT5, IT6) and tau oligomerization (IT3, IT4, IT5, IT6). This is the first report to identify tau epitope-specific aptamers. Such tau aptamers can be used to detect tau in biofluids and uncover the mechanism of tauopathy. They can be further developed into novel therapeutic agents in mitigating tauopathy-associated neurodegenerative disorders.

中文翻译:

Tau 蛋白磷酸化表位特异性 DNA 适配体的鉴定和表征

Tau 蛋白是稳定微管的蛋白质,但它们的过度磷酸化会导致蛋白质聚集体的形成,随着时间的推移,会导致神经变性。这种称为 tau 蛋白病变的现象在病理上与几种神经退行性疾病有关。DNA适体是能够与靶分子特异性结合的单链寡核苷酸。使用易于磷酸化的 tau 表位,我们确定了六个不同的适体,它们在两个可磷酸化的表位(Thr-231 和 Ser-202)处与 tau 结合,并以纳摩尔亲和力与全长 Tau441 蛋白结合。此外,这些适体中的一些还抑制 tau 磷酸化(IT4、IT5、IT6)和 tau 寡聚化(IT3、IT4、IT5、IT6)。这是第一份鉴定 tau 表位特异性适体的报告。这种 tau 适配体可用于检测生物流体中的 tau 蛋白并揭示 tau 蛋白病变的机制。它们可以进一步发展成为减轻 tau 蛋白病相关神经退行性疾病的新型治疗剂。
更新日期:2018-10-02
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