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2018 ; 24
(ä): 1251-1257
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Pretreatment with Erythropoietin Attenuates Lung Ischemia/Reperfusion Injury via
Toll-Like Receptor-4/Nuclear Factor-?B (TLR4/NF-?B) Pathway
#MMPMID29493564
He Q
; Zhao X
; Bi S
; Cao Y
Med Sci Monit
2018[Mar]; 24
(ä): 1251-1257
PMID29493564
show ga
BACKGROUND Lung ischemia/reperfusion injury (LIRI) is a medical problem featuring
pulmonary dysfunction and damage. The present study aimed to investigate the
protective effects of erythropoietin (EPO), which has been reported to be an
anti-inflammatory agent, on LIRI through inhibiting the TLR-4/NF-?B signaling
pathway. MATERIAL AND METHODS All rats were randomly divided into 3 groups (n=8):
a control group, a vehicle+LIRI group, and an EPO+LIRI group. LIRI included
90-min ischemia and 120-min reperfusion, while RhEpo was administered (3 kU/kg)
intraperitoneally 2 h before the operation. Levels of pulmonary inflammatory
responses were examined by analyzing pulmonary permeability index (PPI),
oxygenation index, histology, and expressions of inflammatory cytokines. RESULTS
Pretreatment with EPO significantly decreased lung W/D ratio, BALF leukocytes
count and percentage, and PPI but increased oxygenation index compared with the
LIRI group (P<0.05). More importantly, with EPO pretreatment there was less
pathological damage compared with the vehicle group. Expressions of inflammatory
cytokines (TNF-?, IL-6, and IL-1?) in the serum were significantly lower in the
EPO group than in the LIRI group (P<0.05). In addition, gene expression and
protein expression of TLR-4 and NF-?B were significantly inhibited with EPO
pretreatment compared with the LIRI group (P<0.05). CONCLUSIONS Our study id the
first to report that EPO protects lung injuries after LIRI through inhibiting the
TLR4-NF-?B signaling pathway, which provides solid evidence for the use of EPO as
a therapeutic agent for treating LIRI in the future.
|*Signal Transduction
[MESH]
|Animals
[MESH]
|Cytokines/blood/metabolism
[MESH]
|Erythropoietin/pharmacology/*therapeutic use
[MESH]