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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 J+Leukoc+Biol
2015 ; 98
(2
): 143-52
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Neutrophil elastase promotes myofibroblast differentiation in lung fibrosis
#MMPMID25743626
Gregory AD
; Kliment CR
; Metz HE
; Kim KH
; Kargl J
; Agostini BA
; Crum LT
; Oczypok EA
; Oury TA
; Houghton AM
J Leukoc Biol
2015[Aug]; 98
(2
): 143-52
PMID25743626
show ga
IPF is a progressive lung disorder characterized by fibroblast proliferation and
myofibroblast differentiation. Although neutrophil accumulation within IPF lungs
has been negatively correlated with outcomes, the role played by neutrophils in
lung fibrosis remains poorly understood. We have demonstrated previously that NE
promotes lung cancer cell proliferation and hypothesized that it may have a
similar effect on fibroblasts. In the current study, we show that NE(-/-) mice
are protected from asbestos-induced lung fibrosis. NE(-/-) mice displayed reduced
fibroblast and myofibroblast content when compared with controls. NE directly
both lung fibroblast proliferation and myofibroblast differentiation in vitro, as
evidenced by proliferation assays, collagen gel contractility assays, and ?SMA
induction. Furthermore, ?SMA induction occurs in a TGF-?-independent fashion.
Treatment of asbestos-recipient mice with ONO-5046, a synthetic NE antagonist,
reduced hydroxyproline content. Thus, the current study points to a key role for
neutrophils and NE in the progression of lung fibrosis. Lastly, the study lends
rationale to use of NE-inhibitory approaches as a novel therapeutic strategy for
patients with lung fibrosis.