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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 PLoS+One
2017 ; 12
(8
): e0183542
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English Wikipedia
LL-37 causes cell death of human nasal epithelial cells, which is inhibited with
a synthetic glycosaminoglycan
#MMPMID28837619
Thomas AJ
; Pulsipher A
; Davis BM
; Alt JA
PLoS One
2017[]; 12
(8
): e0183542
PMID28837619
show ga
LL-37 is an immune peptide that regulates innate and adaptive immune responses in
the upper airways. Elevated levels of LL-37 have been linked to cell death and
inflammatory diseases, such as chronic rhinosinusitis (CRS). Glycosaminoglycans
(GAGs) are polysaccharides that are found on respiratory epithelial cells and
serve important roles in mucosal surface repair. Recent findings suggest that a
synthetic glycosaminoglycan (GM-0111) can protect against LL-37-induced sinonasal
mucosal inflammation and cell death in a murine model of acute RS. Herein, we
elucidated the mechanisms by which LL-37 causes sinonasal inflammation and how
GM-0111 can prevent these mechanisms. When challenged with LL-37, human nasal
epithelial cells (HNEpCs) and mouse macrophages (J774.2) demonstrated increased
release of adenosine triphosphate (ATP) and interleukin (IL)-6 and -8, as well as
cell death and lysis. These cellular responses were all blocked dose-dependently
by pre-treatment with GM-0111. We identified that LL-37-induced cell death is
associated with caspase-1 and -8 activation, but not activation of caspase-3/7.
These responses were again blocked by GM-0111. Our data suggest that LL-37 causes
cellular death of HNEpCs and macrophages through the pro-inflammatory necrotic
and/or pyroptotic pathways rather than apoptosis, and that a GM-0111 is capable
of inhibiting these pro-inflammatory cellular events.