Tau-dependent microtubule disassembly initiated by prefibrillar beta-amyloid.

Tau-dependent microtubule disassembly initiated by prefibrillar beta-amyloid.
复制标题

依赖性β-淀粉样蛋白引发的tau依赖性微管拆卸。

DOI:
10.1083/jcb.200605187
复制
发表时间:
2006-11-20
期刊:
The Journal of cell biology
影响因子:
--
通讯作者:
Bloom GS
Bloom GS
中科院分区:
其他
文献类型:
--
作者:
King ME;Kan HM;Baas PW;Erisir A;Glabe CG;Bloom GS

文献摘要

参考文献

被引文献

相似文献

阿尔茨海默病(AD)的组织病理学特征是细胞外β-淀粉样蛋白(Aβ)纤维和神经元内tau蛋白丝。对转基因小鼠和培养细胞的研究表明,AD是由Aβ位于tau上游的病理级联反应引起的,但Aβ与tau之间的连接步骤仍不明确。我们证明,在表达转染的tau蛋白的非神经元细胞和表达内源性tau蛋白的培养神经元中,tau蛋白赋予微管对前纤维细胞外Aβ的急性超敏反应。前原纤维Aβ42在亚微摩尔浓度下具有活性,比前原纤维Aβ40的等效作用所需的浓度低几倍,微管对原纤维Aβ不敏感。tau蛋白的活性区域位于N-末端结构域,该结构域不结合微管,并且不是组装成细丝的tau蛋白区域的一部分。这些结果表明,AD发病机制中的精细胞生物学事件是由神经元暴露于易扩散的Aβ引起的急性tau依赖性微管完整性丧失。
Alzheimer's Disease (AD) is defined histopathologically by extracellular β-amyloid (Aβ) fibrils plus intraneuronal tau filaments. Studies of transgenic mice and cultured cells indicate that AD is caused by a pathological cascade in which Aβ lies upstream of tau, but the steps that connect Aβ to tau have remained undefined. We demonstrate that tau confers acute hypersensitivity of microtubules to prefibrillar, extracellular Aβ in nonneuronal cells that express transfected tau and in cultured neurons that express endogenous tau. Prefibrillar Aβ42 was active at submicromolar concentrations, several-fold below those required for equivalent effects of prefibrillar Aβ40, and microtubules were insensitive to fibrillar Aβ. The active region of tau was localized to an N-terminal domain that does not bind microtubules and is not part of the region of tau that assembles into filaments. These results suggest that a seminal cell biological event in AD pathogenesis is acute, tau-dependent loss of microtubule integrity caused by exposure of neurons to readily diffusible Aβ.
DOI: 10.1038/416535a
发表时间: 2002-04-04
期刊: NATURE
影响因子: 64.8
作者:
Walsh, DM;Klyubin, I;Selkoe, DJ
通讯作者: Selkoe, DJ
DOI: 10.1074/jbc.m507378200
发表时间: 2006-01-06
影响因子: 4.8
作者:
Fifre, A;Sponne, I;Pillot, T
通讯作者: Pillot, T
DOI: 10.1074/jbc.m410136200
发表时间: 2005-01-14
影响因子: 4.8
作者:
Shen, SS;Tucker, WC;Steinhardt, RA
通讯作者: Steinhardt, RA
DOI: 10.1073/pnas.0509386103
发表时间: 2006-02-07
影响因子: 11.1
作者:
Guo, JP;Arai, T;McGeer, PL
通讯作者: McGeer, PL
DOI: 10.1074/jbc.m109535200
发表时间: 2002-04-05
影响因子: 4.8
作者:
Mateer, SC;McDaniel, AE;Bloom, GS
通讯作者: Bloom, GS