Loss of tau elicits axonal degeneration in a mouse model of Alzheimer's disease.
Loss of tau elicits axonal degeneration in a mouse model of Alzheimer's disease.
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DOI:
10.1016/j.neuroscience.2010.04.037
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发表时间:
2010-08-11
期刊:
影响因子:
3.3
通讯作者:
Laskowitz, D. T.
中科院分区:
文献类型:
--
作者:
Dawson, H. N.;Cantillana, V.;Jansen, M.;Wang, H.;Vitek, M. P.;Wilcock, D. M.;Lynch, J. R.;Laskowitz, D. T.
A central issue in the pathogenesis of tauopathy is the question of how tau protein dysfunction leads to neurodegeneration. We have previously demonstrated that the absence of tau protein is associated with destabilization of microtubules and impaired neurite outgrowth. We now hypothesize that the absence of functional tau protein may render the central nervous system more vulnerable to secondary insults such as the overexpression of mutated beta amyloid precursor protein (APP) and traumatic brain injury. We therefore crossed tau knockout mice to mice overexpressing a mutated human APP (APP670,671, Asw) and created a mouse model (Asw/mTau−/−) that provides evidence that the loss of tau causes degeneration of neuronal processes. The overexpression of APP670,671 in tau knockout mice, elicits the extensive formation of axonal spheroids. While spheroids are only found associated with Aβ plaques in mice expressing APP670,671 on an endogenous mouse tau background, Asw/mTau−/− mice have spheroids not only surrounding Aβ plaques but also in white matter tracts and in the neuropil. Plaque associated and neuropil dystrophic neurites and spheroids are prominent features of Alzheimer’s disease. Thus our current data suggests that loss of tau may lead to neurodegeneration.
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DOI:
10.1083/jcb.101.4.1371
发表时间:
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期刊:
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影响因子:
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