Universität zu Köln

Paesler, Katharina, Xie, Kan, Hettich, Moritz M., Siwek, Magdalena E., Ryan, Devon P., Schroeder, Susanne, Papazoglou, Anna, Broich, Karl, Mueller, Ralf, Trog, Astrid, Garthe, Alexander, Kempermann, Gerd ORCID: 0000-0002-5304-4061, Weiergraeber, Marco and Ehninger, Dan (2015). Limited Effects of an eIF2 alpha(S51A) Allele on Neurological Impairments in the 5xFAD Mouse Model of Alzheimer's Disease. Neural. Plast., 2015. LONDON: HINDAWI LTD. ISSN 1687-5443

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Abstract

Alzheimer's disease (AD) has been associated with increased phosphorylation of the translation initiation factor 2 alpha (eIF2 alpha) at serine 51. Increased phosphorylation of eIF2.. alters translational control and may thereby have adverse effects on synaptic plasticity, learning, and memory. To analyze if increased levels of p-eIF2 alpha indeed promote AD-related neurocognitive impairments, we crossed 5xFAD transgenic mice with an eIF2 alpha(S51A) knock-in line that expresses the nonphosphorylatable eIF2 alpha variant eIF2 alpha(S51A). Behavioral assessment of the resulting mice revealed motor and cognitive deficits in 5xFAD mice that were, with the possible exception of locomotor hyperactivity, not restored by the eIF2 alpha(S51A) allele. Telemetric intracranial EEG recordings revealed no measurable effects of the eIF2 alpha(S51A) allele on 5xFAD-associated epileptic activity. Microarray-based transcriptome analyses showed clear transcriptional alterations in 5xFAD hippocampus that were not corrected by the eIF2 alpha(S51A) allele. In contrast to prior studies, our immunoblot analyses did not reveal increased levels of p-eIF2 alpha in the hippocampus of 5xFAD mice, suggesting that elevated p-eIF2 alpha levels are not a universal feature of AD models. Collectively, our data indicate that 5xFAD-related pathologies do not necessarily require hyperphosphorylation of eIF2 alpha to emerge; they also show that heterozygosity for the nonphosphorylatable eIF2 alpha(S51A) allele has limited effects on 5xFAD-related disease manifestations.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Paesler, Katharina UNSPECIFIED UNSPECIFIED UNSPECIFIED Xie, Kan UNSPECIFIED UNSPECIFIED UNSPECIFIED Hettich, Moritz M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Siwek, Magdalena E. UNSPECIFIED UNSPECIFIED UNSPECIFIED Ryan, Devon P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Schroeder, Susanne UNSPECIFIED UNSPECIFIED UNSPECIFIED Papazoglou, Anna UNSPECIFIED UNSPECIFIED UNSPECIFIED Broich, Karl UNSPECIFIED UNSPECIFIED UNSPECIFIED Mueller, Ralf UNSPECIFIED UNSPECIFIED UNSPECIFIED Trog, Astrid UNSPECIFIED UNSPECIFIED UNSPECIFIED Garthe, Alexander UNSPECIFIED UNSPECIFIED UNSPECIFIED Kempermann, Gerd UNSPECIFIED orcid.org/0000-0002-5304-4061 UNSPECIFIED Weiergraeber, Marco UNSPECIFIED UNSPECIFIED UNSPECIFIED Ehninger, Dan UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-416880
DOI:	10.1155/2015/825157
Journal or Publication Title:	Neural. Plast.
Volume:	2015
Date:	2015
Publisher:	HINDAWI LTD
Place of Publication:	LONDON
ISSN:	1687-5443
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language HIPPOCAMPAL SYNAPTIC PLASTICITY; AMYLOID-PRECURSOR-PROTEIN; TRANSGENIC MICE; TRANSLATIONAL CONTROL; GENE-EXPRESSION; NUCLEUS BASALIS; BRAIN-REGIONS; CELL LOSS; DYSFUNCTION; PHOSPHORYLATION Multiple languages Neurosciences Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/41688