Increased Human Wildtype Tau Attenuates Axonal Transport Deficits Caused by Loss of APP in Mouse Models.

Journal Article (Journal Article)

Amyloid precursor protein (APP) is implicated in axonal elongation, synaptic plasticity, and axonal transport. However, the role of APP on axonal transport in conjunction with the microtubule associated protein tau continues to be debated. Here we measured in vivo axonal transport in APP knockout mice with Manganese Enhanced MRI (MEMRI) to determine whether APP is necessary for maintaining normal axonal transport. We also tested how overexpression and mutations of tau affect axonal transport in the presence or absence of APP. In vivo axonal transport reduced significantly in the absence of functional APP. Overexpression of human wildtype tau maintained normal axonal transport and resulted in a transient compensation of axonal transport deficits in the absence of APP. Mutant R406Wtau in combination with the absence of APP compounded axonal transport deficits and these deficits persisted with age. These results indicate that APP is necessary for axonal transport, and overexpression of human wildtype tau can compensate for the absence of APP at an early age.

Full Text

Duke Authors

Cited Authors

  • Smith, KDB; Peethumnongsin, E; Lin, H; Zheng, H; Pautler, RG

Published Date

  • 2010

Published In

Volume / Issue

  • 4 /

Start / End Page

  • 11 - 18

PubMed ID

  • 20798780

Pubmed Central ID

  • PMC2927830

International Standard Serial Number (ISSN)

  • 1178-623X

Digital Object Identifier (DOI)

  • 10.4137/mri.s5237

Language

  • eng

Conference Location

  • United States