Volume 8 Supplement 1

Molecular Neurodegeneration: Basic biology and disease pathways

Open Access

Peripheral inflammation increases PKR activation, Tau phosphorylation and amyloid β production in wild-type mice

  • François Mouton-Liger1, 2,
  • Anne-Sophie Rebillat1,
  • Clarisse Pace1,
  • Sarah Gourmaud1,
  • Mariko Taga1, 3,
  • Claire Paquet1, 2 and
  • Jacques Hugon1, 2
Molecular Neurodegeneration20138(Suppl 1):P32

https://doi.org/10.1186/1750-1326-8-S1-P32

Published: 13 September 2013

Background

Systemic inflammation is correlated with dementia progression. Pro-inflammatory molecules can communicate from the periphery to the central nervous system to induce neuroinflammation and neurodegeneration. Our protein of interest is the pro-apoptotic kinase PKR (the double strand-RNA dependent protein kinase). Increased activated PKR levels were found in AD patients brain and cerebrospinal fluid. PKR activation can be triggered by inflammatory stresses and induces neurotoxicity in vitro. Is in vivo PKR-mediated inflammation involved in AD neurodegenerative process?

Learning objective

To investigate whether PKR-mediated neuroinflammation could play a role in AD neurodegenerative process.

Methods

C57BL/6 wild type mice were injected intraperitoneally with LPS (1mk/kg) versus saline once a day for 3 days to induce PKR activation and neuroinflammation (LPS is the bacilli gram negative endotoxin lipopolysaccharide).

Brains were collected and dissected; immunohistochemistry and western blotting were performed for neuroinflammation, PKR activation and AD pathological hallmarks (as Tau hyperphosphorylation).

Results

Mice showed endotoxin-induced sickness behaviour includingbody weight loss and elevated serum cytokine levels.

Microglial activation, neuronal apoptosis, increase of PKR, GSK3β and Tau phosphorylation and amyloid β production were found in hippocampus and cortex of LPS-treated mice.

Conclusions

PKR could be involved in the signalling of neurofibrillary tangles formation after a systemic inflammatory challenge.

Authors’ Affiliations

(1)
Inserm UMR-S839
(2)
Hopital Lariboisière APHP
(3)
University of Southampton

Copyright

© Mouton-Liger et al; licensee BioMed Central Ltd. 2013

This article is published under license to BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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