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@ARTICLE{Strackeljan:276824,
author = {Strackeljan, Luisa and Baidoe-Ansah, David and
Mirzapourdelavar, Hadi and Jia, Shaobo and Kaushik, Rahul
and Cangalaya, Carla and Dityatev, Alexander},
title = {{P}artial microglial depletion through inhibition of
colony-stimulating factor 1 receptor improves synaptic
plasticity and cognitive performance in aged mice.},
journal = {Experimental neurology},
volume = {387},
issn = {0014-4886},
address = {Amsterdam [u.a.]},
publisher = {Elsevier},
reportid = {DZNE-2025-00337},
pages = {115186},
year = {2025},
abstract = {Microglia depletion, followed by repopulation, improves
cognitive functions in the aged mouse brain. However, even
temporal ablation of microglia puts the brain at a high risk
of infection. Hence, in the present work, we studied if the
partial reduction of microglia with PLX3397 (pexidartinib),
an inhibitor of the colony-stimulating factor 1 receptor
(CSF1R), could bring similar benefits as reported for
microglia ablation. Aged (two-years-old) mice were treated
with PLX3397 for a total of 6 weeks, which reduced microglia
numbers in the hippocampus and retrosplenial cortex (RSC) to
the levels seen in young mice and resulted in layer-specific
ablation in the expression of microglial complement protein
C1q mediating synaptic remodeling. This treatment boosted
long-term potentiation in the CA1 region and improved
performance in the hippocampus-dependent novel object
location recognition task. Although PLX3397 treatment did
not alter the number or total intensity of Wisteria
floribunda agglutinin-positive perineuronal nets (PNNs) in
the CA1 region of the hippocampus, it changed the fine
structure of PNNs. It also elevated the expression of
perisynaptic proteoglycan brevican, presynaptic vGluT1 at
excitatory synapses, and vGAT in inhibitory ones in the CA1
stratum radiatum. Thus, targeting the CSF1R may provide a
safe and efficient strategy to boost synaptic and cognitive
functions in the aged brain.},
keywords = {Aging (Other) / Brevican (Other) / Extracellular matrix
(Other) / Glia (Other) / Parvalbumin (Other) / Perineuronal
nets (Other) / Perisynaptic ECM (Other) / Synapses (Other)},
cin = {AG Dityatev},
ddc = {610},
cid = {I:(DE-2719)1310007},
pnm = {351 - Brain Function (POF4-351)},
pid = {G:(DE-HGF)POF4-351},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:39956381},
doi = {10.1016/j.expneurol.2025.115186},
url = {https://pub.dzne.de/record/276824},
}