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@ARTICLE{Rhnert:136528,
author = {Röhnert, Peter and Schmidt, Werner and Emmerlich, Patrick
and Goihl, Alexander and Wrenger, Sabine and Bank, Ute and
Nordhoff, Karsten and Täger, Michael and Ansorge, Siegfried
and Reinhold, Dirk and Striggow, Frank},
title = {{D}ipeptidyl peptidase {IV}, aminopeptidase {N} and
{DPIV}/{APN}-like proteases in cerebral ischemia.},
journal = {Journal of neuroinflammation},
volume = {9},
number = {1},
issn = {1742-2094},
address = {London},
publisher = {BioMed Central},
reportid = {DZNE-2020-02850},
pages = {557},
year = {2012},
abstract = {Cerebral inflammation is a hallmark of neuronal
degeneration. Dipeptidyl peptidase IV, aminopeptidase N as
well as the dipeptidyl peptidases II, 8 and 9 and cytosolic
alanyl-aminopeptidase are involved in the regulation of
autoimmunity and inflammation. We studied the expression,
localisation and activity patterns of these proteases after
endothelin-induced occlusion of the middle cerebral artery
in rats, a model of transient and unilateral cerebral
ischemia.Male Sprague-Dawley rats were used. RT-PCR,
immunohistochemistry and protease activity assays were
performed at different time points, lasting from 2 h to 7
days after cerebral ischemia. The effect of protease
inhibitors on ischemia-dependent infarct volumes was
quantified 7 days post middle cerebral artery occlusion.
Statistical analysis was conducted using the
t-test.Qualitative RT-PCR revealed these proteases in
ipsilateral and contralateral cortices. Dipeptidyl peptidase
II and aminopeptidase N were up-regulated ipsilaterally from
6 h to 7 days post ischemia, whereas dipeptidyl peptidase 9
and cytosolic alanyl-aminopeptidase were transiently
down-regulated at day 3. Dipeptidyl peptidase 8 and
aminopeptidase N immunoreactivities were detected in
cortical neurons of the contralateral hemisphere. At the
same time point, dipeptidyl peptidase IV, 8 and
aminopeptidase N were identified in activated microglia and
macrophages in the ipsilateral cortex. Seven days post
artery occlusion, dipeptidyl peptidase IV immunoreactivity
was found in the perikarya of surviving cortical neurons of
the ipsilateral hemisphere, whereas their nuclei were
dipeptidyl peptidase 8- and amino peptidase N-positive. At
the same time point, dipeptidyl peptidase IV, 8 and
aminopeptidase N were targeted in astroglial cells. Total
dipeptidyl peptidase IV, 8 and 9 activities remained
constant in both hemispheres until day 3 post experimental
ischemia, but were increased $(+165\%)$ in the ipsilateral
cortex at day 7. In parallel, aminopeptidase N and cytosolic
alanyl-aminopeptidase activities remained unchanged.Distinct
expression, localization and activity patterns of proline-
and alanine-specific proteases indicate their involvement in
ischemia-triggered inflammation and neurodegeneration.
Consistently, IPC1755, a non-selective protease inhibitor,
revealed a significant reduction of cortical lesions after
transient cerebral ischemia and may suggest dipeptidyl
peptidase IV, aminopeptidase N and proteases with similar
substrate specificity as potentially therapy-relevant
targets.},
keywords = {Animals / Brain Ischemia: complications / Brain Ischemia:
drug therapy / Brain Ischemia: enzymology / CD13 Antigens:
genetics / CD13 Antigens: metabolism / Cerebral Infarction:
enzymology / Cerebral Infarction: etiology / Dipeptidyl
Peptidase 4: genetics / Dipeptidyl Peptidase 4: metabolism /
Dipeptidyl-Peptidases and Tripeptidyl-Peptidases: genetics /
Dipeptidyl-Peptidases and Tripeptidyl-Peptidases: metabolism
/ Disease Models, Animal / Enzyme Inhibitors: therapeutic
use / Functional Laterality / Gene Expression Regulation,
Enzymologic: physiology / Glial Fibrillary Acidic Protein:
metabolism / Glycosphingolipids: therapeutic use / Male /
Phosphopyruvate Hydratase: metabolism / RNA, Messenger:
metabolism / Rats / Rats, Sprague-Dawley / Time Factors /
Enzyme Inhibitors (NLM Chemicals) / Glial Fibrillary Acidic
Protein (NLM Chemicals) / Glycosphingolipids (NLM Chemicals)
/ RNA, Messenger (NLM Chemicals) /
inositolphosphorylceramide (NLM Chemicals) / CD13 Antigens
(NLM Chemicals) / Dipeptidyl-Peptidases and
Tripeptidyl-Peptidases (NLM Chemicals) / Dpp8 protein, rat
(NLM Chemicals) / Dipeptidyl Peptidase 4 (NLM Chemicals) /
Phosphopyruvate Hydratase (NLM Chemicals)},
cin = {AG Striggow},
ddc = {610},
cid = {I:(DE-2719)5000045},
pnm = {342 - Disease Mechanisms and Model Systems (POF3-342)},
pid = {G:(DE-HGF)POF3-342},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:22373413},
pmc = {pmc:PMC3359160},
doi = {10.1186/1742-2094-9-44},
url = {https://pub.dzne.de/record/136528},
}