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2017 ; 9
(4
): 1810-1821
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MLN4924 protects against bleomycin-induced pulmonary fibrosis by inhibiting the
early inflammatory process
#MMPMID28469786
Deng Q
; Zhang J
; Gao Y
; She X
; Wang Y
; Wang Y
; Ge X
Am J Transl Res
2017[]; 9
(4
): 1810-1821
PMID28469786
show ga
Pulmonary fibrosis is a complex pathological process characterized by massive
destruction of the structure of lung tissues and aggravated pulmonary function
impairment. The underlying mechanisms of pulmonary fibrosis are incompletely
understood and therefore limited treatment options are available currently. Here,
we report that MLN4924, an NEDD8 activation enzyme (NAE) activity-inhibiting
molecule, blocks the maintenance and progression of established pulmonary
fibrosis. We found that MLN4924 acts against bleomycin-induced pulmonary fibrosis
mainly at the early inflammatory stage. Pharmacologically targeting the
neddylation of Cullin-Ring E3 ligase (CRL) by MLN4924, significantly abrogated
NF-?B responses, suppressed MAPK activity, and reduced secretion of
TNF-?-elicited pro-inflammatory cytokines and MCP1-induced chemokines. MLN4924
inhibited pro-inflammatory responses while maintaining or increasing the
production of the anti-inflammatory mediators such as anti-inflammatory
interleukins (ILs) following bleomycin administration, which is closely
correlated to its blocking NF-?B-mediated signaling. Consistently, our studies
identified MLN4924 as a promising therapeutic drug for pulmonary fibrosis and
suggested a potential role of MLN4924 that fine tunes the MAPK signaling pathway
controlling the inflammatory reactions at the early stages of pulmonary fibrosis.
In addition, our findings may broaden the potential practical application of
MLN4924 as an effective therapeutic strategy against other
inflammation-associated diseases.