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2016 ; 20
(3
): 305-14
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NecroX-5 exerts anti-inflammatory and anti-fibrotic effects via modulation of the
TNF?/Dcn/TGF?1/Smad2 pathway in hypoxia/reoxygenation-treated rat hearts
#MMPMID27162485
Thu VT
; Kim HK
; Long le T
; Thuy TT
; Huy NQ
; Kim SH
; Kim N
; Ko KS
; Rhee BD
; Han J
Korean J Physiol Pharmacol
2016[May]; 20
(3
): 305-14
PMID27162485
show ga
Inflammatory and fibrotic responses are accelerated during the reperfusion
period, and excessive fibrosis and inflammation contribute to cardiac
malfunction. NecroX compounds have been shown to protect the liver and heart from
ischemia-reperfusion injury. The aim of this study was to further define the role
and mechanism of action of NecroX-5 in regulating infl ammation and fi brosis
responses in a model of hypoxia/reoxygenation (HR). We utilized HR-treated rat
hearts and lipopolysaccharide (LPS)-treated H9C2 culture cells in the presence or
absence of NecroX-5 (10 µmol/L) treatment as experimental models. Addition of
NecroX-5 signifi cantly increased decorin (Dcn) expression levels in HR-treated
hearts. In contrast, expression of transforming growth factor beta 1 (TGF?1) and
Smad2 phosphorylation (pSmad2) was strongly attenuated in NecroX-5-treated
hearts. In addition, signifi cantly increased production of tumor necrosis factor
alpha (TNF?), TGF?1, and pSmad2, and markedly decreased Dcn expression levels,
were observed in LPS-stimulated H9C2 cells. Interestingly, NecroX-5
supplementation effectively attenuated the increased expression levels of TNF?,
TGF?1, and pSmad2, as well as the decreased expression of Dcn. Thus, our data
demonstrate potential antiinflammatory and anti-fibrotic effects of NecroX-5
against cardiac HR injuries via modulation of the TNF?/Dcn/TGF?1/Smad2 pathway.