Moderate environmental enrichment mitigates tauopathy in a neurofibrillary tangle mouse model

Inbal Lahiani-Cohen, Athanasios Lourbopoulos, Ester Haber, Lea Rozenstein-Tsalkovich, Oded Abramsky, Nikolaos Grigoriadis, Hanna Rosenmann

Research output: Contribution to journalArticlepeer-review

23 Scopus citations

Abstract

Epidemiological studies show that stimulating activities reduce therisk of dementia. In animal models of Alzheimer disease, there have been conflicting results of the effects of environmental enrichment (EE) on disease-related amyloid pathology. Here, we tested the direct effect of EE, independently of amyloid pathology, on brain neurofibrillary tangles (NFTs), which best correlate with dementia. We exposed transgenic mice (E257K/P301S-Tau-Tg driven by the natural tau promoter) to moderate nonstrained EE or regular environment. Concomitant with neurogenesis, we detected a decrease in NFT burden and a decrease in the activation of microglia in EE versus regular-environment mice. There was also a trend toward improvementin cognitive tasks in the EE mice. Increased immunoreactivity of brain-derived neurotrophic factor, which is involved in the regulation of tau phosphorylation, was detected in the EE mice, suggesting its possible involvement in the beneficial effects on NFTs and other parameters in the EE mice. These results suggest that NFTs may be directly responsive to environmental stimulating activities and that even nonstrained activities may mitigate tauopathies independent of theinvolvement of amyloid.

Original languageEnglish
Pages (from-to)610-621
Number of pages12
JournalJournal of Neuropathology and Experimental Neurology
Volume70
Issue number7
DOIs
StatePublished - 1 Jul 2011
Externally publishedYes

Keywords

  • Alzheimer disease
  • Brain-derived neurotrophic factor
  • Environmental enrichment
  • Neurofibrillary tangles
  • Neurogenesis
  • Tau
  • Tauopathy

ASJC Scopus subject areas

  • Pathology and Forensic Medicine
  • Neurology
  • Clinical Neurology
  • Cellular and Molecular Neuroscience

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