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Eur J Microbiol Immunol (Bp). 2013 Mar 1;3(1):21-27.

Genomic background-related activation of microglia and reduced β-amyloidosis in a mouse model of Alzheimer's disease.

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1
Neurodegeneration Research Lab (NRL), Department of Neurology, University of Magdeburg, Leipziger Str. 44, 39120 Magdeburg, Germany.

Abstract

Alzheimer's disease (AD) is by far the most common neurodegenerative disease. AD is histologically characterized not only by extracellular senile plaques and vascular deposits consisting of β-amyloid (Aβ) but also by accompanying neuroinflammatory processes involving the brain's microglia. The importance of the microglia is still in controversial discussion, which currently favors a protective function in disease progression. Recent findings by different research groups highlighted the importance of strain-specific and mitochondria-specific genomic variations in mouse models of cerebral β-amyloidosis. Here, we want to summarize our previously presented data and add new results that draw attention towards the consideration of strain-specific genomic alterations in the setting of APP transgenes. We present data from APP-transgenic mice in commonly used C57Bl/6J and FVB/N genomic backgrounds and show a direct influence on the kinetics of Aβ deposition and the activity of resident microglia. Plaque size, plaque deposition rate and the total amount of Aβ are highest in C57Bl/6J mice as compared to the FVB/N genomic background, which can be explained at least partially by a reduced microglia activity towards amyloid deposits in the C57BL/6J strain.

KEYWORDS:

Alzheimer’s disease; genomic background; microglia; mouse models; neurodegeneration; neuroinflammation

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