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Tau isoform with three microtubule binding domains is a marker of new axons generated from the subgranular zone in the hippocampal dentate gyrus: Implications for alzheimer's disease

AuthorsLlorens-Martín, M. ; Texeira, Cátia M.; Fuster-Matanzo, Almudena ; Jurado-Arjona, Jerónimo ; Borrell, V.; Soriano, Eduardo; Ávila, Jesús ; Hernández Pérez, Félix
KeywordsDentate gyrus
Subgranular zone
Tau protein
Adult neurogenesis
Issue Date2012
PublisherIOS Press
CitationJournal of Alzheimer's Disease 29: 921- 930 (2012)
AbstractIn the adult hippocampal dentate gyrus, newborn granule cells grow dendrites into the molecular layer and send axons into the CA3 region. Several molecular markers have been used to analyze production of these new neurons; however, no good markers for new axons have been described. Here we demonstrate that tau protein isoform with three microtubule binding domains (3R-Tau) is a marker of those axons following an antigen retrieval protocol. By using retrovirus-mediated GFP transduction, GFP can be detected in a period of 7-14 days after viral infection. We also provide a >proof of principle> demonstration of the power of that labeling showing modulation of 3R-Tau positive axons under physiological conditions (exercise and aging) as well as in a FTDP-17 neurodegenerative model and Alzheimer's disease models (mice overexpressing AβPPsw, ind or GSK3β). We conclude that 3R-Tau would be an efficient marker and a valuable tool to study new axons in adult neurogenesis as well as in neurodegenerative processes. © 2012-IOS Press and the authors. All rights reserved.
Identifiersdoi: 10.3233/JAD-2012-112057
issn: 1387-2877
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