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2017 ; 8
(ä): 740
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15-Deoxy-Delta-12,14-Prostaglandin J(2) Inhibits Lung Inflammation and Remodeling
in Distinct Murine Models of Asthma
#MMPMID28713373
Coutinho DS
; Anjos-Valotta EA
; do Nascimento CVMF
; Pires ALA
; Napimoga MH
; Carvalho VF
; Torres RC
; E Silva PMR
; Martins MA
Front Immunol
2017[]; 8
(ä): 740
PMID28713373
show ga
15-deoxy-?-12,14-prostaglandin J(2) (15d-PGJ(2)) has been described as an
anti-inflammatory lipid mediator in several in vitro and in vivo studies, but its
effect on allergic pulmonary inflammation remains elusive. The aim of this study
was to investigate the therapeutic potential of 15d-PGJ(2) based on distinct
murine models of allergic asthma triggered by either ovalbumin (OVA) or house
dust mite extract (HDM). Characteristics of lung inflammation, airway
hyper-reactivity (AHR), mucus exacerbation, and lung remodeling in sensitized A/J
mice treated or not with 15d-PGJ(2) were assessed. 15d-PGJ(2) treatments were
carried out systemically or topically given via subcutaneous injection or
intranasal instillation, respectively. Analyses were carried out 24?h after the
last allergen provocation. Irrespective of the route of administration,
15d-PGJ(2) significantly inhibited the peribronchial accumulation of eosinophils
and neutrophils, subepithelial fibrosis and also mucus exacerbation caused by
either OVA or HDM challenge. The protective effect of 15d-PGJ(2) occurred in
parallel with inhibition of allergen-induced AHR and lung tissue production of
pro-inflammatory cytokines, such as interleukin (IL)-5, IL-13, IL-17, and TNF-?.
Finally, 15d-PGJ(2) was found effective in inhibiting NF-?B phosphorylation upon
HDM challenge as measured by Western blotting. In conclusion, our findings
suggest that 15d-PGJ(2) can reduce crucial features of asthma, including AHR,
lung inflammation, and remodeling in distinct murine models of the disease. These
effects are associated with a decrease in lung tissue generation of
pro-inflammatory cytokines by a mechanism related to downregulation of NF-?B
phosphorylation.