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@ARTICLE{Tuz:301568,
author = {A. A. Tuz and S. Ghosh and L. Karsch and M. Antler and V.
Lakovic and S. Lohmann and A. H. Lehmann and A. Beer and D.
Nagel and M. Jung and N. Hörenbaum and V. Kaygusuz and A.
Qefalia and B. Alshaar and N. Amookazemi and S. Bolsega and
M. Basic and J. T. Siveke$^*$ and S. Heiles and A.
Grüneboom and S. Lueong$^*$ and J. Herz and A. Sickmann and
N. Hagemann and A. Hasenberg and D. M. Hermann and M. Gunzer
and V. Singh},
title = {{G}ut microbiota deficiency reduces neutrophil activation
and is protective after ischemic stroke.},
journal = {Journal of neuroinflammation},
volume = {22},
number = {1},
issn = {1742-2094},
address = {London},
publisher = {BioMed Central},
reportid = {DKFZ-2025-01076},
pages = {137},
year = {2025},
abstract = {Neutrophils are readily activated immune cells after
ischemic stroke in mice and patients. Still, the impact of
gut microbiota on neutrophil activation and its influence on
inflammatory brain injury remain undefined. We report that
natural microbiota colonization of germ-free (GF) mice
induces substantial neutrophil activation and deteriorates
stroke pathology. The colonized Ex-GF stroke mice had
considerably larger infarct sizes and higher sensorimotor
deficits than GF littermates. Furthermore, employing an
antibiotic-based mouse model of microbiota deficiency, we
demonstrate that gut microbiota depletion induces a juvenile
neutrophil phenotype characterized by the upregulation of
resting state surface receptors, reduced inflammatory
proteins, and levels of circulating NETs. This disarming of
neutrophil responses was associated with decreased
expression of brain inflammatory genes, vascular thrombus
formation, reduced infarct size, and alleviated behavioral
deficits. We conclude that gut microbes strongly influence
neutrophil activation after stroke and thus directly
contribute to stroke severity.},
keywords = {Animals / Gastrointestinal Microbiome: physiology /
Gastrointestinal Microbiome: immunology / Mice / Neutrophil
Activation: physiology / Ischemic Stroke: pathology /
Ischemic Stroke: immunology / Ischemic Stroke: microbiology
/ Ischemic Stroke: prevention $\&$ control / Mice, Inbred
C57BL / Male / Neutrophils / Germ-Free Life / Gut microbiota
(Other) / Inflammation (Other) / Ischemic stroke (Other) /
Neutrophils (Other)},
cin = {ED01},
ddc = {610},
cid = {I:(DE-He78)ED01-20160331},
pnm = {899 - ohne Topic (POF4-899)},
pid = {G:(DE-HGF)POF4-899},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:40410847},
pmc = {pmc:PMC12100894},
doi = {10.1186/s12974-025-03448-w},
url = {https://inrepo02.dkfz.de/record/301568},
}