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2015 ; 21
(4
): 359-68
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15-epi-lipoxin A4 reduces the mortality of prematurely born pups in a mouse model
of infection-induced preterm birth
#MMPMID25567326
Rinaldi SF
; Catalano RD
; Wade J
; Rossi AG
; Norman JE
Mol Hum Reprod
2015[Apr]; 21
(4
): 359-68
PMID25567326
show ga
Preterm birth remains the leading cause of neonatal mortality and morbidity
worldwide. There are currently few effective therapies and therefore an urgent
need for novel treatments. Although there is much focus on trying to alter
gestation of delivery, the primary aim of preterm birth prevention therapies
should be to reduce prematurity related mortality and morbidity. Given the link
between intrauterine infection and inflammation and preterm labour (PTL), we
hypothesized that administration of lipoxins, key anti-inflammatory and
pro-resolution mediators, could be a useful novel treatment for PTL. Using a
mouse model of infection-induced PTL, we investigated whether 15-epi-lipoxin A4
could delay lipopolysaccharide (LPS)-induced PTL and reduce pup mortality. On D17
of gestation mice (n = 9-12) were pretreated with vehicle or 15-epi-lipoxin A4
prior to intrauterine administration of LPS or PBS. Although pretreatment with
15-epi-lipoxin A4 did not delay LPS-induced PTL, there was a significant
reduction in the mortality amongst prematurely delivered pups (defined as
delivery within 36 h of surgery) in mice treated with 15-epi-lipoxin A4 prior to
LPS treatment, compared with those receiving LPS alone (P < 0.05). Quantitative
real-time (QRT)-PCR analysis of utero-placental tissues harvested 6 h
post-treatment demonstrated that 15-epi-lipoxin A4 treatment increased Ptgs2
expression in the uterus, placenta and fetal membranes (P < 0.05) and decreased
15-Hpgd expression (P < 0.05) in the placenta and uterus, suggesting that
15-epi-lipoxin A4 may regulate the local production and activity of
prostaglandins. These data suggest that augmenting lipoxin levels could be a
useful novel therapeutic option in the treatment of PTL, protecting the fetus
from the adverse effects of infection-induced preterm birth.