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2017 ; 15
(4
): 2154-2162
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The role of ZFP580, a novel zinc finger protein, in TGF-mediated cytoprotection
against chemical hypoxia?induced apoptosis in H9c2 cardiac myocytes
#MMPMID28259939
Mao SY
; Meng XY
; Xu ZW
; Zhang WC
; Jin XH
; Chen X
; Zhou X
; Li YM
; Xu RC
Mol Med Rep
2017[Apr]; 15
(4
): 2154-2162
PMID28259939
show ga
Zing finger protein 580 (ZFP580) is a novel Cys2-His2 zinc-finger transcription
factor that has an anti-apoptotic role in myocardial cells. It is involved in the
endothelial transforming growth factor??1 (TGF??1) signal transduction pathway as
a mothers against decapentaplegic homolog (Smad)2 binding partner. The aim of the
present study was to determine the involvement of ZFP580 in TGF??1?mediated
cytoprotection against chemical hypoxia?induced apoptosis, using H9c2 cardiac
myocytes. Hypoxia was chemically induced in H9c2 myocardial cells by exposure to
cobalt chloride (CoCl2). In response to hypoxia, cell viability was decreased,
whereas the expression levels of hypoxia inducible factor-1? and ZFP580 were
increased. Pretreatment with TGF??1 attenuated CoCl2?induced cell apoptosis and
upregulated ZFP580 protein expression; however, these effects could be suppressed
by SB431542, an inhibitor of TGF?? type I receptor and Smad2/3 phosphorylation.
Furthermore, suppression of ZFP580 expression by RNA interference reduced the
anti?apoptotic effects of TGF??1 and thus increased CoCl2?induced apoptosis.
B?cell lymphoma (Bcl)?2?associated X protein/Bcl?2 ratio, reactive oxygen species
generation and caspase?3 activation were also increased following ZFP580
inactivation. In conclusion, these results indicate that ZFP580 is a component of
the TGF-?1/Smad signaling pathway, and is involved in the protective effects of
TGF??1 against chemical hypoxia?induced cell apoptosis, through inhibition of the
mitochondrial apoptotic pathway.