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2017 ; 7
(1
): 5392
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Inhibition of CTGF ameliorates peritoneal fibrosis through suppression of
fibroblast and myofibroblast accumulation and angiogenesis
#MMPMID28710437
Sakai N
; Nakamura M
; Lipson KE
; Miyake T
; Kamikawa Y
; Sagara A
; Shinozaki Y
; Kitajima S
; Toyama T
; Hara A
; Iwata Y
; Shimizu M
; Furuichi K
; Kaneko S
; Tager AM
; Wada T
Sci Rep
2017[Jul]; 7
(1
): 5392
PMID28710437
show ga
Peritoneal fibrosis (PF) is a serious complication in various clinical settings,
but the mechanisms driving it remain to be fully determined. Connective tissue
growth factor (CTGF) is known to regulate fibroblast activities. We therefore
examined if CTGF inhibition has anti-fibrotic effects in PF. PF was induced by
repetitive intraperitoneal injections of chlorhexidine gluconate (CG) in mice
with type I pro-collagen promoter-driven green fluorescent protein (GFP)
expression to identify fibroblasts. FG-3019, an anti-CTGF monoclonal antibody,
was used to inhibit CTGF. CG-induced PF was significantly attenuated in
FG-3019-treated mice. CG challenges induced marked accumulations of proliferating
fibroblasts and of myofibroblasts, which were both reduced by FG-3019. Levels of
peritoneal CTGF expression were increased by CG challenges, and suppressed in
FG-3019-treated mice. FG-3019 treatment also reduced the number of CD31(+)
vessels and VEGF-A-positive cells in fibrotic peritoneum. In vitro studies using
NIH 3T3 fibroblasts and peritoneal mesothelial cells (PMCs) showed that CTGF
blockade suppressed TGF-?(1)-induced fibroblast proliferation and myofibroblast
differentiation, PMC mesothelial-to-mesenchymal transition, and VEGF-A
production. These findings suggest that the inhibition of CTGF by FG-3019 might
be a novel treatment for PF through the regulation of fibroblast and
myofibroblast accumulation and angiogenesis.