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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 PLoS+One
2016 ; 11
(5
): e0154874
Nephropedia Template TP
gab.com Text
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English Wikipedia
MAP3K19 Is a Novel Regulator of TGF-? Signaling That Impacts Bleomycin-Induced
Lung Injury and Pulmonary Fibrosis
#MMPMID27144281
Boehme SA
; Franz-Bacon K
; DiTirro DN
; Ly TW
; Bacon KB
PLoS One
2016[]; 11
(5
): e0154874
PMID27144281
show ga
Idiopathic pulmonary fibrosis (IPF) is a progressive, debilitating disease for
which two medications, pirfenidone and nintedanib, have only recently been
approved for treatment. The cytokine TGF-? has been shown to be a central
mediator in the disease process. We investigated the role of a novel kinase,
MAP3K19, upregulated in IPF tissue, in TGF-?-induced signal transduction and in
bleomycin-induced pulmonary fibrosis. MAP3K19 has a very limited tissue
expression, restricted primarily to the lungs and trachea. In pulmonary tissue,
expression was predominantly localized to alveolar and interstitial macrophages,
bronchial epithelial cells and type II pneumocytes of the epithelium. MAP3K19 was
also found to be overexpressed in bronchoalveolar lavage macrophages from IPF
patients compared to normal patients. Treatment of A549 or THP-1 cells with
either MAP3K19 siRNA or a highly potent and specific inhibitor reduced
phospho-Smad2 & 3 nuclear translocation following TGF-? stimulation.
TGF-?-induced gene transcription was also strongly inhibited by both the MAP3K19
inhibitor and nintedanib, whereas pirfenidone had a much less pronounced effect.
In combination, the MAP3K19 inhibitor appeared to act synergistically with either
pirfenidone or nintedanib, at the level of target gene transcription or protein
production. Finally, in an animal model of IPF, inhibition of MAP3K19 strongly
attenuated bleomycin-induced pulmonary fibrosis when administered either
prophylactically ortherapeutically. In summary, these results strongly suggest
that inhibition of MAP3K19 may have a beneficial therapeutic effect in the
treatment of IPF and represents a novel strategy to target this disease.