Title: Cell type-specific expression of neuropilins in an MCA-occlusion model in mice suggests a potential role in post-ischemic brain remodeling
Authors: Beck, Heike ×
Acker, Till
Püschel, Andreas W
Fujisawa, Hajime
Carmeliet, Peter
Plate, Karl H #
Issue Date: Apr-2002
Series Title: Journal of Neuropathology and Experimental Neurology vol:61 issue:4 pages:339-50
Abstract: Neuropilin-1 and -2 (NP-1/NP-2) are transmembrane receptors that play a role in axonal guidance by binding of class III semaphorins, and in angiogenesis by binding of the vascular endothelial growth factor isoform VEGF165 and placenta growth factor (PLGF). We investigated the expression pattern of NP-1/NP-2, their co-receptors, vascular endothelial growth factor receptor-1 and -2 (VEGFR-1, VEGFR-2), and their ligands, class III semaphorins, VEGF and PLGF, following experimental cerebral ischemia in mice. By means of in situ hybridization and immunohistochemistry we observed loss of expression of class III semaphorins in neurons in the infarct/peri-infarct area. In contrast, we observed high expression of NP-1 in vessels, neurons, and astrocytes surrounding the infarct. VEGF and PLGF were upregulated in different cell types following stroke. Our results suggest a shift in the balance between semaphorins and VEGF/PLGF, which compete for NP-binding. Possibly, the loss of semaphorins facilitates binding of the competing ligands (VEGF/PLGF), thus inducing angiogenesis. In addition, the observed expression patterns further suggest a neurotrophic/neuroprotective role of VEGF/PLGF.
ISSN: 0022-3069
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Molecular and Vascular Biology
Laboratory of Angiogenesis and Vascular Metabolism (VIB-KU Leuven Centre for Cancer Biology) (+)
× corresponding author
# (joint) last author

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