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2017 ; 16
(1
): 49-56
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PPAR-? improves the recovery of lung function following acute respiratory
distress syndrome by suppressing the level of TGF-?1
#MMPMID28498479
Liu Y
; Xie L
; Yang M
; Tan X
; Zeng Y
; Zheng G
; Chen Y
; Chen P
Mol Med Rep
2017[Jul]; 16
(1
): 49-56
PMID28498479
show ga
Although peroxisome proliferator-activated receptor (PPAR)-? has been reported to
be involved in preventing acute lung injury (ALI), the molecular regulation of
post?ALI lung recovery remains to be fully elucidated. The aim of the present
study was to characterize the mechanism by which PPAR?? prevents ALI and examine
the role of PPAR?? in the recovery of lung function following acute respiratory
distress syndrome (ARDS). Reverse transcription?quantitative?polymerase chain
reaction and western blot analyses suggested that PPAR?? was effective in
suppressing transforming growth factor (TGF)??1 in HLF cells and RAW 264.7 cells.
In an ALI mouse model, PPAR?? treatment prior to stimulation with
lipopolysaccharide (LPS) resulted in a decrease in the expression of TGF??1 in
bronchoalveolar lavage fluid (BALF), peripheral blood and splenocytes. The
injection of a virus expressing short hairpin PPAR?? into mice following LPS
treatment resulted in a dose?dependent increase in lung resistance index and
decrease in dynamic compliance, and a significant increase in BALF protein, which
indicated PPAR?? was essential for the recovery of lung function following ALI.
Of note, the serum expression of PPAR?? was inversely correlated with TGF??1 and
negatively correlated with disease severity in patients with ARDS. These data
suggested that PPAR?? was essential for the recovery of lung function following
ALI by the suppression of TGF??1, which reveals a previously unappreciated
mechanism controlling post?ALI lung recovery.