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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 J+Neuroinflammation
2015 ; 12
(ä): 214
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Matrix-derived inflammatory mediator N-acetyl proline-glycine-proline is
neurotoxic and upregulated in brain after ischemic stroke
#MMPMID26588897
Hill JW
; Nemoto EM
J Neuroinflammation
2015[Nov]; 12
(ä): 214
PMID26588897
show ga
BACKGROUND: N-acetyl proline-glycine-proline (ac-PGP) is a matrix-derived
chemokine produced through the proteolytic destruction of collagen by matrix
metalloproteinases (MMPs). While upregulation and activation of MMPs and
concomitant degradation of the extracellular matrix are known to be associated
with neurological injury in ischemic stroke, the production of ac-PGP in stroke
brain and its effects on neurons have not been investigated. FINDINGS: We
examined the effects of ac-PGP on primary cortical neurons and found that it
binds neuronal CXCR2 receptors, activates extracellular signal-regulated kinase
1/2 (ERK1/2), and induces apoptosis associated with caspase-3 cleavage in a
dose-dependent manner. After transient ischemic stroke in rats, ac-PGP was
significantly upregulated in infarcted brain tissue. CONCLUSIONS: The production
of ac-PGP in brain in ischemia/reperfusion injury and its propensity to induce
apoptosis in neurons may link MMP-mediated destruction of the extracellular
matrix and opening of the blood-brain barrier to progressive neurodegeneration
associated with the initiation and propagation of inflammation. Ac-PGP may be a
novel neurotoxic inflammatory mediator involved in sustained inflammation and
neurodegeneration in stroke and other neurological disorders associated with
activation of MMPs.