Reducing the RNA binding protein TIA1 protects against tau-mediated neurodegeneration in vivo.

Reducing the RNA binding protein TIA1 protects against tau-mediated neurodegeneration in vivo.
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DOI:
10.1038/s41593-017-0022-z
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发表时间:
2018-01
影响因子:
25
通讯作者:
Wolozin B
Wolozin B
中科院分区:
医学1区
文献类型:
--
作者:
Apicco DJ;Ash PEA;Maziuk B;LeBlang C;Medalla M;Al Abdullatif A;Ferragud A;Botelho E;Ballance HI;Dhawan U;Boudeau S;Cruz AL;Kashy D;Wong A;Goldberg LR;Yazdani N;Zhang C;Ung CY;Tripodis Y;Kanaan NM;Ikezu T;Cottone P;Leszyk J;Li H;Luebke J;Bryant CD;Wolozin B

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新出现的研究表明,tau在调节RNA结合蛋白(RBPs)的生物学中发挥了作用。我们现在发现,在体内减少RBP T细胞内抗原1(TIA1)可以保护转基因P301S tau小鼠的神经退化和延长存活时间。生化分级显示,在转基因P301S tau小鼠中,tau寡聚体和RBPs共富集和共存。降低TIA1可减少与应激颗粒标志物共定位的颗粒数量和大小。降低TIA1也会抑制tau寡聚体的积累,但代价是增加神经原纤维缠结(NFT)。尽管NFT增加,但TIA1的减少增加了神经元的存活率,挽救了行为缺陷和寿命。这些数据提供了体内证据,证明TIA1在介导毒性方面发挥关键作用,并进一步表明RBPs指导tau聚集和由此导致的神经退变的途径。我们提出了一种范式,即翻译应激反应的功能障碍导致tau介导的病理。
Emerging studies suggest a role for tau in regulating the biology of RNA binding proteins (RBPs). We now show that reducing the RBP T-cell intracellular antigen 1 (TIA1) in vivo protects against neurodegeneration and prolongs survival in transgenic P301S tau mice. Biochemical fractionation shows co-enrichment and co-localization of tau oligomers and RBPs in transgenic P301S tau mice. Reducing TIA1 decreases the number and size of granules co-localizing with stress granule markers. Decreasing TIA1 also inhibits the accumulation of tau oligomers at the expense of increasing neurofibrillary tangles (NFTs). Despite the increase in NFTs, TIA1 reduction increases neuronal survival and rescues behavioral deficits and lifespan. These data provide in vivo evidence that TIA1 plays a key role in mediating toxicity, and further suggest that RBPs direct the pathway of tau aggregation and the resulting neurodegeneration. We propose a paradigm in which dysfunction of the translational stress response leads to tau-mediated pathology.
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