Impaired adult neurogenesis in the dentate gyrus of a triple transgenic mouse model of Alzheimer's Ddisease

José J. Rodríguez, Victoria C. Jones, Masashi Tabuchi, Stuart M. Allan, Elysse M. Knight, Frank M. LaFerla, Salvatore Oddo, Alexei Verkhratsky

Research output: Contribution to journalArticle

234 Citations (Scopus)

Abstract

It has become generally accepted that new neurones are added and integrated mainly in two areas of the mammalian CNS, the subventricular zone and the subgranular zone (SGZ) of the dentate gyrus (DG) of the hippocampus, which is of central importance in learning and memory. The newly generated cells display neuronal morphology, are able to generate action potentials and receive functional synaptic inputs, i.e. their properties are similar to those found in mature neurones. Alzheimer's disease (AD) is the primary and widespread cause of dementia and is an age-related, progressive and irreversible neurodegenerative disease that deteriorates cognitive functions. Here, we have used male and female triple transgenic mice (3xTg-AD) harbouring three mutant genes (β-amyloid precursor protein, presenilin-1 and tau) and their respective non-transgenic (non-Tg) controls at 2, 3, 4, 6, 9 and 12 months of age to establish the link between AD and neurogenesis. Using immunohistochemistry we determined the area density of proliferating cells within the SGZ of the DG, measured by the presence of phosphorylated Histone H3 (HH3), and their possible co-localisation with GFAP to exclude a glial phenotype. Less than 1% of the HH3 labeled cells co-localised with GFAP. Both non-Tg and 3xTg-AD showed an age-dependent decrease in neurogenesis. However, male 3xTg-AD mice demonstrated a further reduction in the production of new neurones from 9 months of age (73% decrease) and a complete depletion at 12 months, when compared to controls. In addition, female 3xTg-AD mice showed an earlier but equivalent decrease in neurogenesis at 4 months (reduction of 63%) with an almost inexistent rate at 12 months (88% decrease) compared to controls. This reduction in neurogenesis was directly associated with the presence of β-amyloid plaques and an increase in the number of β-amyloid containing neurones in the hippocampus; which in the case of 3xgTg females was directly correlated. These results suggest that 3xTg-AD mice have an impaired ability to generate new neurones in the DG of the hippocampus, the severity of which increases with age and might be directly associated with the known cognitive impairment observed from 6 months of age onwards. The earlier reduction of neurogenesis in females, from 4 months, is in agreement with the higher prevalence of AD in women than in men. Thus it is conceivable to speculate that a recovery in neurogenesis rates in AD could help to rescue cognitive impairment.

Original languageEnglish (US)
Article numbere2935
JournalPLoS One
Volume3
Issue number8
DOIs
StatePublished - Aug 13 2008
Externally publishedYes

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neurogenesis
Neurogenesis
Dentate Gyrus
Alzheimer disease
Transgenic Mice
Alzheimer Disease
animal models
genetically modified organisms
Neurons
neurons
amyloid
hippocampus
Parahippocampal Gyrus
mice
Amyloid
histones
Histones
Neurodegenerative diseases
Presenilin-1
Aptitude

ASJC Scopus subject areas

  • Agricultural and Biological Sciences(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Medicine(all)

Cite this

Rodríguez, J. J., Jones, V. C., Tabuchi, M., Allan, S. M., Knight, E. M., LaFerla, F. M., ... Verkhratsky, A. (2008). Impaired adult neurogenesis in the dentate gyrus of a triple transgenic mouse model of Alzheimer's Ddisease. PLoS One, 3(8), [e2935]. https://doi.org/10.1371/journal.pone.0002935

Impaired adult neurogenesis in the dentate gyrus of a triple transgenic mouse model of Alzheimer's Ddisease. / Rodríguez, José J.; Jones, Victoria C.; Tabuchi, Masashi; Allan, Stuart M.; Knight, Elysse M.; LaFerla, Frank M.; Oddo, Salvatore; Verkhratsky, Alexei.

In: PLoS One, Vol. 3, No. 8, e2935, 13.08.2008.

Research output: Contribution to journalArticle

Rodríguez, JJ, Jones, VC, Tabuchi, M, Allan, SM, Knight, EM, LaFerla, FM, Oddo, S & Verkhratsky, A 2008, 'Impaired adult neurogenesis in the dentate gyrus of a triple transgenic mouse model of Alzheimer's Ddisease', PLoS One, vol. 3, no. 8, e2935. https://doi.org/10.1371/journal.pone.0002935
Rodríguez, José J. ; Jones, Victoria C. ; Tabuchi, Masashi ; Allan, Stuart M. ; Knight, Elysse M. ; LaFerla, Frank M. ; Oddo, Salvatore ; Verkhratsky, Alexei. / Impaired adult neurogenesis in the dentate gyrus of a triple transgenic mouse model of Alzheimer's Ddisease. In: PLoS One. 2008 ; Vol. 3, No. 8.
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