Cited by 32Alzheimer's disease research and treatmentsNeuroinflammation and Neurodegeneration MechanismsNeurogenesis and neuroplasticity mechanisms

Activation of Cell Cycle Proteins in Transgenic Mice in Response to Neuronal Loss but not Amyloid-β and Tau Pathology

Lopes, Joao P., Blurton-Jones, Mathew, Yamasaki, Tritia R., Agostinho, Paula, LaFerla, Frank M.·2009·Journal of Alzheimer's Disease

Abstract

Cell cycle proteins are elevated in the brain of patients and in transgenic models of Alzheimer's disease (AD), suggesting that aberrant cell cycle re-entry plays a key role in this disorder. However, the precise relationship between cell cycle reactivation and the hallmarks of AD, amyloid-beta (Abeta) plaques and tau-laden neurofibrillary tangles, remains unclear. We sought to determine whether cell cycle reactivation initiates in direct response to Abeta and tau accumulation or whether it occurs as a downstream consequence of neuronal death pathways. Therefore, we used a triple transgenic mouse model of AD (3xTg-AD) that develops plaques and tangles, but does not exhibit extensive neuronal loss, whereas to model hippocampal neuronal death a tetracycline-regulatable transgenic model of neuronal ablation (CaM/Tet-DT(A) mice) was used. Cell-cycle protein activation was determined in these two models of neurodegeneration, using biochemical and histological approaches. Our findings indicate that Cdk4, PCNA and phospho-Rb are significantly elevated in CaM/Tet-DT(A) mice following neuronal death. In contrast, no significant activation of cell-cycle proteins occurs in 3xTg-AD mice versus non-transgenic controls. Taken together, our data indicate that neuronal cell cycle reactivation is not a prominent feature induced by Abeta or tau pathology, but rather appears to be triggered by acute neuronal loss.

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Crossref · 10.3233/jad-2009-0993

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Authors
Lopes, J. P., Blurton-Jones, M., Yamasaki, T. R., Agostinho, P., & LaFerla, F. M.
Affiliations
  • Center for Neuroscience and Cell Biology, Faculty of Medicine, Biochemistry Institute, University of Coimbra, Coimbra, Portugal
  • University of California, Irvine (US)
  • Centro de Neurociências e Biologia Celular (PT)
Venue
Journal of Alzheimer's Disease
Published
2009-03-09
Volume
16
Issue
3
Pages
541-549
ISSN
  • 1387-2877 (ISSN-L)
  • 1875-8908
OpenAlex
W1583540109
Cited by
32
References
38
Citations by year
2024: 1 · 2021: 2 · 2020: 1 · 2019: 1 · 2018: 1 · 2017: 1 · 2015: 4 · 2014: 1 · 2013: 6 · 2012: 4
FWCI
3.09
Type
journal article
Language
en
Open access
closed
Locations
  • Journal of Alzheimer s Disease (publishedVersion)
  • PubMed (publishedVersion)
Funders
National Institute on Aging (R01AG027544)
Topics
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
  • Life Sciences › Neuroscience › Developmental Neuroscience › Neurogenesis and neuroplasticity mechanisms
Keywords
cell cycle re-entry, Alzheimer's disease
MeSH terms
Alzheimer Disease, Animals, Denervation, Disease Models, Animal, Histones, Mice, Transgenic, Neurons, Tetracycline, Retinoblastoma Protein, Amyloid beta-Peptides, tau Proteins, Cell Death, Cell Cycle Proteins, Proliferating Cell Nuclear Antigen, Cyclin-Dependent Kinase 4, Mice

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