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@ARTICLE{Rehman:273922,
author = {Rehman, Rida and Froehlich, Albrecht and Olde Heuvel,
Florian and Elsayed, Lobna and Boeckers, Tobias and
Huber-Lang, Markus and Morganti-Kossmann, Cristina and
Roselli, Francesco},
title = {{T}he {FGFR} inhibitor {R}ogaratinib reduces microglia
reactivity and synaptic loss in {TBI}.},
journal = {Frontiers in immunology},
volume = {15},
issn = {1664-3224},
address = {Lausanne},
publisher = {Frontiers Media},
reportid = {DZNE-2024-01396},
pages = {1443940},
year = {2024},
abstract = {Traumatic brain injury (TBI) induces an acute reactive
state of microglia, which contribute to secondary injury
processes through phagocytic activity and release of
cytokines. Several receptor tyrosine kinases (RTK) are
activated in microglia upon TBI, and their blockade may
reduce the acute inflammation and decrease the secondary
loss of neurons; thus, RTKs are potential therapeutic
targets. We have previously demonstrated that several
members of the Fibroblast Growth Factor Receptor (FGFR)
family are transiently phosporylated upon TBI; the
availability for drug repurposing of FGFR inhibitors makes
worthwhile the elucidation of the role of FGFR in the acute
phases of the response to TBI and the effect of FGFR
inhibition.A closed, blunt, weight-drop mild TBI protocol
was employed. The pan-FGFR inhibitor Rogaratinib was
administered to mice 30min after the TBI and daily up to 7
days post injury. Phosphor-RTK Arrays and proteomic antibody
arrays were used to determine target engagement and
large-scale impact of the FGFR inhibitor. pFGFR1 and pFGFR3
immunostaining were employed for validation. As outcome
parameters of the TBI injury immunostainings for NeuN,
VGLUT1, VGAT at 7dpi were considered.Inhibition of FGFR
during TBI restricted phosphorylation of FGFR1, FGFR3, FGFR4
and ErbB4. Phosphorylation of FGFR1 and FGFR3 during TBI was
traced back to Iba1+ microglia. Rogaratinib substantially
dowregulated the proteomic signature of the
neuroimmunological response to trauma, including the
expression of CD40L, CXCR3, CCL4, CCR4, ILR6, MMP3 and OPG.
Prolonged Rogaratinib treatment reduced neuronal loss upon
TBI and prevented the loss of excitatory (vGLUT+)
synapses.The FGFR family is involved in the early induction
of reactive microglia in TBI. FGFR inhibition selectively
prevented FGFR phosphorylation in the microglia, dampened
the overall neuroimmunological response and enhanced the
preservation of neuronal and synaptic integrity. Thus, FGFR
inhibitors may be relevant targets for drug repurposing
aimed at modulating microglial reactivity in TBI.},
keywords = {Animals / Microglia: drug effects / Microglia: metabolism /
Brain Injuries, Traumatic: drug therapy / Brain Injuries,
Traumatic: metabolism / Brain Injuries, Traumatic:
immunology / Mice / Male / Synapses: drug effects /
Synapses: metabolism / Mice, Inbred C57BL / Phosphorylation:
drug effects / Disease Models, Animal / Receptor, Fibroblast
Growth Factor, Type 1: antagonists $\&$ inhibitors /
Receptor, Fibroblast Growth Factor, Type 1: metabolism /
Protein Kinase Inhibitors: pharmacology / Protein Kinase
Inhibitors: therapeutic use / proteomics (Other) / reactive
microglia (Other) / receptor tyrosine kinase (Other) /
synapses (Other) / traumatic brain injury (Other) /
Receptor, Fibroblast Growth Factor, Type 1 (NLM Chemicals) /
Protein Kinase Inhibitors (NLM Chemicals)},
cin = {AG Roselli / AG Böckers},
ddc = {610},
cid = {I:(DE-2719)1910001 / I:(DE-2719)1910002},
pnm = {352 - Disease Mechanisms (POF4-352)},
pid = {G:(DE-HGF)POF4-352},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:39635532},
pmc = {pmc:PMC11614719},
doi = {10.3389/fimmu.2024.1443940},
url = {https://pub.dzne.de/record/273922},
}