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rdf:type
lifeskim:mentions
pubmed:issue
7
pubmed:dateCreated
2011-2-17
pubmed:abstractText
This report describes the behavioral and electrophysiological analysis of regulatable transgenic mice expressing mutant repeat domains of human Tau (Tau(RD)). Mice were generated to express Tau(RD) in two forms, differing in their propensity for ?-structure and thus in their tendency for aggregation ("pro-aggregant" or "anti-aggregant") (Mocanu et al., 2008). Only pro-aggregant mice show pronounced changes typical for Tau pathology in Alzheimer's disease (aggregation, missorting, hyperphosphorylation, synaptic and neuronal loss), indicating that the ?-propensity and hence the ability to aggregate is a key factor in the disease. We now tested the mice with regard to neuromotor parameters, behavior, learning and memory, and synaptic plasticity and correlated this with histological and biochemical parameters in different stages of switching Tau(RD) on or off. The mice are normal in neuromotor tests. However, pro-aggregant Tau(RD) mice are strongly impaired in memory and show pronounced loss of long-term potentiation (LTP), suggesting that Tau aggregation specifically perturbs these brain functions. Remarkably, when the expression of human pro-aggregant Tau(RD) is switched on for ? 10 months and off for ? 4 months, memory and LTP recover, whereas aggregates decrease moderately and change their composition from mixed human plus mouse Tau to mouse Tau only. Neuronal loss persists, but synapses are partially rescued. This argues that continuous presence of amyloidogenic pro-aggregant Tau(RD) constitutes the main toxic insult for memory and LTP, rather than the aggregates as such.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Feb
pubmed:issn
1529-2401
pubmed:author
pubmed:issnType
Electronic
pubmed:day
16
pubmed:volume
31
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
2511-25
pubmed:meshHeading
pubmed-meshheading:21325519-Animals, pubmed-meshheading:21325519-Disease Models, Animal, pubmed-meshheading:21325519-Doxycycline, pubmed-meshheading:21325519-Hand Strength, pubmed-meshheading:21325519-Hippocampus, pubmed-meshheading:21325519-Humans, pubmed-meshheading:21325519-Long-Term Potentiation, pubmed-meshheading:21325519-Maze Learning, pubmed-meshheading:21325519-Memory, pubmed-meshheading:21325519-Mice, pubmed-meshheading:21325519-Mice, Transgenic, pubmed-meshheading:21325519-Mutation, pubmed-meshheading:21325519-Nerve Tissue Proteins, pubmed-meshheading:21325519-Neuropsychological Tests, pubmed-meshheading:21325519-Protein Structure, Tertiary, pubmed-meshheading:21325519-Space Perception, pubmed-meshheading:21325519-Synapses, pubmed-meshheading:21325519-Tauopathies, pubmed-meshheading:21325519-Time Factors, pubmed-meshheading:21325519-tau Proteins
pubmed:year
2011
pubmed:articleTitle
Tau-induced defects in synaptic plasticity, learning, and memory are reversible in transgenic mice after switching off the toxic Tau mutant.
pubmed:affiliation
Max Planck Unit for Structural Molecular Biology, c/o DESY, 22607 Hamburg, Germany.
pubmed:publicationType
Journal Article, In Vitro, Research Support, Non-U.S. Gov't