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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+Interferon+Cytokine+Res
2015 ; 35
(6
): 464-73
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Interferon-? Mediates Signaling Pathways Uniquely Regulated in Hepatic Stellate
Cells and Attenuates the Progression of Hepatic Fibrosis in a Dietary Mouse
Model
#MMPMID25715168
Shimozono R
; Nishimura K
; Akiyama H
; Funamoto S
; Izawa A
; Sai T
; Kunita K
; Kainoh M
; Suzuki T
; Kawada N
J Interferon Cytokine Res
2015[Jun]; 35
(6
): 464-73
PMID25715168
show ga
The results of clinical and experimental studies suggest that type I interferons
(IFNs) may have direct antifibrotic activity in addition to their antiviral
properties. However, the mechanisms are still unclear; in particular, little is
known about the antifibrotic activity of IFN-? and how its activity is distinct
from that of IFN-?. Using DNA microarrays, we demonstrated that gene expression
in TWNT-4 cells, an activated human hepatic stellate cell line, was remarkably
altered by IFN-? more than by IFN-?. Integrated pathway enrichment analyses
revealed that a variety of IFN-?-mediated signaling pathways are uniquely
regulated in TWNT-4 cells, including those related to cell cycle and Toll-like
receptor 4 (TLR4) signaling. To investigate the antifibrotic activity of IFN-?
and the involvement of TLR4 signaling in vivo, we used mice fed a
choline-deficient l-amino acid-defined diet as a model of nonalcoholic
steatohepatitis-related hepatic fibrosis. In this model, the administration of
IFN-? significantly attenuated augmentation of the area of liver fibrosis, with
accompanying transcriptional downregulation of the TLR4 adaptor molecule MyD88.
Our results provide important clues for understanding the mechanisms of the
preferential antifibrotic activity of IFN-? and suggest that IFN-? itself, as
well as being a modulator of its unique signaling pathway, may be a potential
treatment for patients with hepatic fibrosis in a pathogenesis-independent
manner.