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2018 ; 36
(2
): 139-146
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Silencing Histone Deacetylase 7 Alleviates Transforming Growth Factor-?1-Induced
Profibrotic Responses in Fibroblasts Derived from Peyronie s Plaque
#MMPMID29706035
Kang DH
; Yin GN
; Choi MJ
; Song KM
; Ghatak K
; Minh NN
; Kwon MH
; Seong DH
; Ryu JK
; Suh JK
World J Mens Health
2018[May]; 36
(2
): 139-146
PMID29706035
show ga
PURPOSE: Epigenetic modifications, such as histone acetylation/deacetylation and
DNA methylation, play a crucial role in the pathogenesis of inflammatory
disorders and fibrotic diseases. The aim of this study was to study the
differential gene expression of histone deacetylases (HDACs) in fibroblasts
isolated from plaque tissue of Peyronie's disease (PD) or normal tunica albuginea
(TA) and to examine the anti-fibrotic effect of small interfering RNA
(siRNA)-mediated silencing of HDAC7 in fibroblasts derived from human PD plaque.
MATERIALS AND METHODS: For differential gene expression study, we performed
reverse-transcriptase polymerase chain reaction for HDAC isoforms (1-11) in
fibroblasts isolated from PD plaque or normal TA. Fibroblasts isolated from PD
plaque were pretreated with HDAC7 siRNA (100 pmol) and then stimulated with
transforming growth factor-?1 (TGF-?1, 10 ng/mL). Protein was extracted from
treated fibroblasts for Western blotting. We also performed immunocytochemistry
to detect the expression of extracellular matrix proteins and to examine the
effect of HDAC2 siRNA on the TGF-?1-induced nuclear translocation of Smad2/3 and
myofibroblastic differentiation. RESULTS: The mRNA expression of HDAC2, 3, 4, 5,
7, 8, 10, and 11 was higher in fibroblasts isolated from PD plaque than in
fibroblasts isolated from normal TA tissue. Knockdown of HDAC7 in PD fibroblasts
inhibited TGF-?1-induced nuclear shuttle of Smad2 and Smad3, transdifferentiation
of fibroblasts into myofibroblasts, and abrogated TGF-?1-induced production of
extracellular matrix protein. CONCLUSIONS: These findings suggest that specific
inhibition of HDAC7 with RNA interference may represent a promising epigenetic
therapy for PD.