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@ARTICLE{LuczakSobotkowska:272577,
author = {Luczak-Sobotkowska, Zuzanna M and Rosa, Patrycja and Lopez,
Maria Banqueri and Ochocka, Natalia and Kiryk, Anna and
Lenkiewicz, Anna M and Fuhrmann, Martin and Jankowski,
Aleksander and Kaminska, Bozena},
title = {{T}racking changes in functionality and morphology of
repopulated microglia in young and old mice.},
journal = {Journal of neuroinflammation},
volume = {21},
number = {1},
issn = {1742-2094},
address = {London},
publisher = {BioMed Central},
reportid = {DZNE-2024-01198},
pages = {248},
year = {2024},
abstract = {Microglia (MG) are myeloid cells of the central nervous
system that support homeostasis and instigate
neuroinflammation in pathologies. Single-cell RNA sequencing
(scRNA-seq) revealed the functional heterogeneity of MG in
mouse brains. Microglia are self-renewing cells and
inhibition of colony-stimulating factor 1 receptor (CSF1R)
signaling depletes microglia which rapidly repopulate. The
functions of repopulated microglia are poorly known.We
combined scRNA-seq, bulk RNA-seq, immunofluorescence, and
confocal imaging to study the functionalities and morphology
of repopulated microglia.A CSRF1R inhibitor (BLZ-945)
depleted microglia within 21 days and a number of microglia
was fully restored within 7 days, as confirmed by TMEM119
staining and flow cytometry. ScRNA-seq and computational
analyses demonstrate that repopulated microglia originated
from preexisting progenitors and reconstituted functional
clusters but upregulated inflammatory genes. Percentages of
proliferating, immature microglia displaying inflammatory
gene expression increased in aging mice. Morphometric
analysis of MG cell body and branching revealed a distinct
morphology of repopulated MG, particularly in brains of old
mice. We demonstrate that with aging some repopulated MG
fail to reach the homeostatic phenotype. These differences
may contribute to the deterioration of MG protective
functions with age.},
keywords = {Animals / Microglia: metabolism / Mice / Aging: physiology
/ Mice, Inbred C57BL / Brain: cytology / Brain: metabolism /
Male / Receptors, Granulocyte-Macrophage Colony-Stimulating
Factor: metabolism / Receptors, Granulocyte-Macrophage
Colony-Stimulating Factor: genetics / Single-Cell Analysis /
Aging (Other) / CSF1R inhibitors (Other) / Microglia
repopulation (Other) / Microglial heterogeneity (Other) /
ScRNA-seq (Other) / Transcriptomics (Other) / Receptors,
Granulocyte-Macrophage Colony-Stimulating Factor (NLM
Chemicals)},
cin = {AG Fuhrmann},
ddc = {610},
cid = {I:(DE-2719)1011004},
pnm = {352 - Disease Mechanisms (POF4-352)},
pid = {G:(DE-HGF)POF4-352},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:39363245},
pmc = {pmc:PMC11448401},
doi = {10.1186/s12974-024-03242-0},
url = {https://pub.dzne.de/record/272577},
}