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@ARTICLE{Claus:201376,
author = {Claus, Helene L. and Walberer, Maureen and Simard, Marie L.
and Emig, Beata and Muesken, Sophia M. and Rueger, Maria A.
and Fink, Gereon R. and Schroeter, Michael},
title = {{NG}2 and {NG}2-positive cells delineate focal cerebral
infarct demarcation in rats},
journal = {Neuropathology},
volume = {33},
number = {1},
issn = {0919-6544},
address = {Oxford [u.a.]},
publisher = {Wiley-Blackwell},
reportid = {FZJ-2015-03671},
pages = {30 - 38},
year = {2013},
abstract = {Focal cerebral ischemia induces cellular responses that may
result in secondary tissue damage. We recently demonstrated
multi-facetted spatial and temporal patterns of
neuroinflammation by multimodal imaging. In the present
study, we especially focus on the separation of vital and
necrotic tissue, which enabled us to define a demarcation
zone. Focal cerebral ischemia was induced via macrosphere
embolization of the middle cerebral artery in Wistar rats.
Subsequent cellular processes were investigated
immunohistochemically from 3 to 56 days after onset of
ischemia. We detected several infarct subareas: a necrotic
infarct core and its margin adjacent to a nerve/glial
antigen 2 (NG2)+ zone delineating it from a vital
peri-infarct zone. Initially transition from necrotic to
vital tissue was gradual; later on necrosis was precisely
separated from vital tissue by a narrow NG2+ belt that was
devoid of astrocytes, oligodendrocytes or neurons. Within
this demarcation zone NG2+ cells associate with ionized
calcium binding adaptor molecule 1 (Iba1) but not with GFAP,
neuronal nuclear antigen (NeuN) or 2′, 3′-cyclic
nucleotide 3′-phosphodiesterase (CNPase). During further
infarct maturation NG2 seemed to be positioned in the
extracellular matrix (ECM) of the demarcation zone, whereas
Iba1+ cells invaded the necrotic infarct core and GFAP+
cells built a gliotic containing belt between the lesion and
NeuN+ unaffected tissue. Overall, our data suggested that
NG2 proteoglycan expression and secretion hallmarked
demarcation as a process that actively separated necrosis
from vital tissue and therefore decisively impacts secondary
neurodegeneration after ischemic stroke.},
cin = {INM-3},
ddc = {610},
cid = {I:(DE-Juel1)INM-3-20090406},
pnm = {333 - Pathophysiological Mechanisms of Neurological and
Psychiatric Diseases (POF2-333)},
pid = {G:(DE-HGF)POF2-333},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000314472000004},
doi = {10.1111/j.1440-1789.2012.01322.x},
url = {https://juser.fz-juelich.de/record/201376},
}