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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 Sci+Rep
2015 ; 5
(ä): 14292
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Lipoproteins/peptides are sepsis-inducing toxins from bacteria that can be
neutralized by synthetic anti-endotoxin peptides
#MMPMID26390973
Martinez de Tejada G
; Heinbockel L
; Ferrer-Espada R
; Heine H
; Alexander C
; Bárcena-Varela S
; Goldmann T
; Correa W
; Wiesmüller KH
; Gisch N
; Sánchez-Gómez S
; Fukuoka S
; Schürholz T
; Gutsmann T
; Brandenburg K
Sci Rep
2015[Sep]; 5
(ä): 14292
PMID26390973
show ga
Sepsis, a life-threatening syndrome with increasing incidence worldwide, is
triggered by an overwhelming inflammation induced by microbial toxins released
into the bloodstream during infection. A well-known sepsis-inducing factor is the
membrane constituent of Gram-negative bacteria, lipopolysaccharide (LPS),
signalling via Toll-like receptor-4. Although sepsis is caused in more than 50%
cases by Gram-positive and mycoplasma cells, the causative compounds are still
poorly described. In contradicting investigations lipoproteins/-peptides (LP),
lipoteichoic acids (LTA), and peptidoglycans (PGN), were made responsible for
eliciting this pathology. Here, we used human mononuclear cells from healthy
donors to determine the cytokine-inducing activity of various LPs from different
bacterial origin, synthetic and natural, and compared their activity with that of
natural LTA and PGN. We demonstrate that LP are the most potent non-LPS
pro-inflammatory toxins of the bacterial cell walls, signalling via Toll-like
receptor-2, not only in vitro, but also when inoculated into mice: A synthetic LP
caused sepsis-related pathological symptoms in a dose-response manner.
Additionally, these mice produced pro-inflammatory cytokines characteristic of a
septic reaction. Importantly, the recently designed polypeptide Aspidasept(®)
which has been proven to efficiently neutralize LPS in vivo, inhibited cytokines
induced by the various non-LPS compounds protecting animals from the
pro-inflammatory activity of synthetic LP.