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2017 ; 49
(6
): e345
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Coupling killing to neutralization: combined therapy with ceftriaxone/Pep19-2 5
counteracts sepsis in rabbits
#MMPMID28620220
Bárcena-Varela S
; Martínez-de-Tejada G
; Martin L
; Schuerholz T
; Gil-Royo AG
; Fukuoka S
; Goldmann T
; Droemann D
; Correa W
; Gutsmann T
; Brandenburg K
; Heinbockel L
Exp Mol Med
2017[Jun]; 49
(6
): e345
PMID28620220
show ga
Sepsis, which is induced by severe bacterial infections, is a major cause of
death worldwide, and therapies combating the disease are urgently needed. Because
many drugs have failed in clinical trials despite their efficacy in mouse models,
the development of reliable animal models of sepsis is in great demand. Several
studies have suggested that rabbits reflect sepsis-related symptoms more
accurately than mice. In this study, we evaluated a rabbit model of acute sepsis
caused by the intravenous inoculation of Salmonella enterica. The model
reproduces numerous symptoms characteristic of human sepsis including
hyperlactatemia, hyperglycemia, leukopenia, hypothermia and the hyperproduction
of several pro-inflammatory cytokines. Hence, it was chosen to investigate the
proposed ability of Pep19-2.5-an anti-endotoxic peptide with high affinity to
lipopolysaccharide and lipoprotein-to attenuate sepsis-associated pathologies in
combination with an antibiotic (ceftriaxone). We demonstrate that a combination
of Pep19-2.5 and ceftriaxone administered intravenously to the rabbits (1) kills
bacteria and eliminates bacteremia 30?min post challenge; (2) inhibits Toll-like
receptor 4 agonists in serum 90?min post challenge; (3) reduces serum levels of
pro-inflammatory cytokines (interleukin-6 and tumor necrosis factor ?); and (4)
reverts to hypothermia and gives rise to temperature values indistinguishable
from basal levels 330?min post challenge. The two components of the combination
displayed synergism in some of these activities, and Pep19-2.5 notably
counteracted the endotoxin-inducing potential of ceftriaxone. Thus, the
combination therapy of Pep19-2.5 and ceftriaxone holds promise as a candidate for
human sepsis therapy.
|Animals
[MESH]
|Anti-Bacterial Agents/administration & dosage/*therapeutic use
[MESH]
|Bacteremia/*drug therapy
[MESH]
|Ceftriaxone/administration & dosage/*therapeutic use
[MESH]
|Disease Models, Animal
[MESH]
|Drug Synergism
[MESH]
|Drug Therapy, Combination
[MESH]
|HEK293 Cells
[MESH]
|Humans
[MESH]
|Hyperlactatemia
[MESH]
|Hypothermia
[MESH]
|Interleukin-6/blood
[MESH]
|Leukopenia
[MESH]
|Lipopolysaccharides/blood
[MESH]
|Male
[MESH]
|Peptides/administration & dosage/*therapeutic use
[MESH]