Distinct tau prion strains propagate in cells and mice and define different tauopathies.

Distinct tau prion strains propagate in cells and mice and define different tauopathies.
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DOI:
10.1016/j.neuron.2014.04.047
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发表时间:
2014-06-18
期刊:
影响因子:
16.2
通讯作者:
Diamond MI
Diamond MI
中科院分区:
医学1区
文献类型:
--
作者:
Sanders DW;Kaufman SK;DeVos SL;Sharma AM;Mirbaha H;Li A;Barker SJ;Foley AC;Thorpe JR;Serpell LC;Miller TM;Grinberg LT;Seeley WW;Diamond MI

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tau蛋白聚集的朊病毒样传播可能是神经退行性tau蛋白病定型进展的基础。真正的朊病毒在体内稳定地保持将结构与病理模式联系起来的独特构象(“菌株”)。我们现在发现tau符合这个标准。稳定表达的tau重复结构域在培养物中以克隆方式无限繁殖不同的淀粉样蛋白构象。将来自这些细胞系的tau重新引入幼稚细胞中重新建立了相同的克隆。我们在体外产生了两种菌株,其通过连续接种到三代转基因小鼠中来确定在体内诱导不同的病理。来自这些小鼠的免疫纯化的tau在培养物中重新产生原始菌株。我们使用该细胞系统从29名患有5种不同tau蛋白病的患者中分离出tau菌株,发现不同的疾病与不同的菌株相关。因此,Tau展示了朊病毒的基本特征。这可以解释tau蛋白病的表型多样性,并可以实现更有效的诊断和治疗。
Prion-like propagation of tau aggregation may underlie the stereotyped progression of neurodegenerative tauopathies. True prions stably maintain unique conformations (“strains”) in vivo that link structure to patterns of pathology. We now find that tau meets this criterion. Stably expressed tau repeat domain indefinitely propagates distinct amyloid conformations in a clonal fashion in culture. Reintroduction of tau from these lines into naïve cells re-establishes identical clones. We produced two strains in vitro that induce distinct pathologies in vivo as determined by successive inoculations into three generations of transgenic mice. Immunopurified tau from these mice re-creates the original strains in culture. We used the cell system to isolate tau strains from 29 patients with 5 different tauopathies, finding that different diseases are associated with different sets of strains. Tau thus demonstrates essential characteristics of a prion. This may explain the phenotypic diversity of tauopathies and could enable more effective diagnosis and therapy.
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