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@PHDTHESIS{Mller:144807,
author = {Müller, Michaela},
title = {{NMDA} {R}eceptor-{D}ependent {A}myloid {B}eta {T}oxicity
in the {C}ontext of {A}lzheimer’s {D}isease},
school = {Ruprechts-Karls-Universität Heidelberg},
type = {Dissertation},
reportid = {DZNE-2020-00249},
pages = {101 pages, Ill.},
year = {2016},
note = {Dissertation, Ruprechts-Karls-Universität Heidelberg,
2016},
abstract = {The amyloid beta (Aβ) protein is known to mediate large
parts of the pathology seen in Alzheimer’s disease (AD).
Previous studies suggested that N-methyl-D-aspartate
receptors (NMDARs) mediate some of the Aβ toxicity.
However, it is not known in detail which NMDAR subunit plays
a role. In this study, I investigated the involvement of the
NMDAR subunits GluN1, GluN2A and GluN2B in Aβ toxicity by
genetically deleting single subunits in individual neurons
via injection of Cre-recombinase expressing AAVs into the
brain of adult mice in which the respective NMDAR genes were
flanked by loxP-sites (GluN1fl/fl, GluN2Afl/fl, and
GluN2Bfl/fl). Aβ toxicity was induced either short-term by
injection of AAVs overexpressing CT100(I716F) which leads to
increased Aβ42 production, or long-term by transgenic
overproduction in the 5xFAD mouse model. Both approaches
allowed me to demonstrate that NMDAR subunits are indeed
involved in Aβ toxicity in adult mice. Aβ induces a
decrease in functional synapse number which is prevented by
deletion of the GluN1 and GluN2B subunit and partially
prevented by deletion of the GluN2A subunit. Furthermore,
short-term Aβ overproduction induced an increase in spine
number which was prevented by GluN1 and Glu2A deletion.
Spine loss in the 5xFAD mouse line could be partially
rescued by GluN1 and GluN2B deletion. In summary, the
results of my thesis demonstrate the importance of both the
GluN2A and Glun2B subunit in Aβ toxicity and suggest that
AD treatment with NMDAR blockers might be beneficial when
treatment is started early.},
cin = {AG Engelhardt},
cid = {I:(DE-2719)1013023},
pnm = {341 - Molecular Signaling (POF3-341)},
pid = {G:(DE-HGF)POF3-341},
typ = {PUB:(DE-HGF)11},
url = {https://pub.dzne.de/record/144807},
}