Format

Send to

Choose Destination
Am J Pathol. 2010 Oct;177(4):1977-88. doi: 10.2353/ajpath.2010.100346. Epub 2010 Aug 27.

A{beta} accelerates the spatiotemporal progression of tau pathology and augments tau amyloidosis in an Alzheimer mouse model.

Author information

1
Department of Pathology, Laboratory Medicine, Center for Neurodegenerative Disease Research, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania 19104-4283, USA.

Abstract

Senile plaques formed by β-amyloid peptides (Aβ) and neurofibrillary tangles (NFTs) formed by hyperphosphorylated tau, a microtubule-associated protein, are the hallmark lesions of Alzheimer's disease (AD) in addition to loss of neurons. While several transgenic (Tg) mouse models have recapitulated aspects of AD-like Aβ and tau pathologies, a spatiotemporal mapping paradigm for progressive NFT accumulation is urgently needed to stage disease progression in AD mouse models. Braak and co-workers developed an effective and widely used NFT staging paradigm for human AD brains. The creation of a Braak-like spatiotemporal staging scheme for tau pathology in mouse models would facilitate mechanistic studies of AD-like tau pathology. Such a scheme would also enhance the reproducibility of preclinical AD therapeutic studies. Thus, we developed a novel murine model of Aβ and tau pathologies and devised a spatiotemporal scheme to stage the emergence and accumulation of NFTs with advancing age. Notably, the development of NFTs followed a spatiotemporal Braak-like pattern similar to that observed in authentic AD. More significantly, the presence of Aβ accelerated NFT formation and enhanced tau amyloidosis; however, tau pathology did not have the same effect on Aβ pathology. This novel NFT staging scheme provides new insights into the mechanisms of tau pathobiology, and we speculate that this scheme will prove useful for other basic and translational studies of AD mouse models.

PMID:
20802182
PMCID:
PMC2947292
DOI:
10.2353/ajpath.2010.100346
[Indexed for MEDLINE]
Free PMC Article

Supplemental Content

Full text links

Icon for Elsevier Science Icon for PubMed Central
Loading ...
Support Center