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2015 ; 16
(5
): 11482-99
Nephropedia Template TP
gab.com Text
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Anti-Fibrotic Effects of Class I HDAC Inhibitor, Mocetinostat Is Associated with
IL-6/Stat3 Signaling in Ischemic Heart Failure
#MMPMID25997003
Nural-Guvener H
; Zakharova L
; Feehery L
; Sljukic S
; Gaballa M
Int J Mol Sci
2015[May]; 16
(5
): 11482-99
PMID25997003
show ga
BACKGROUND: Recent studies have linked histone deacetylases (HDAC) to remodeling
of the heart and cardiac fibrosis in heart failure. However, the molecular
mechanisms linking chromatin remodeling events with observed anti-fibrotic
effects are unknown. Here, we investigated the molecular players involved in
anti-fibrotic effects of HDAC inhibition in congestive heart failure (CHF)
myocardium and cardiac fibroblasts in vivo. METHODS AND RESULTS: MI was created
by coronary artery occlusion. Class I HDACs were inhibited in three-week post MI
rats by intraperitoneal injection of Mocetinostat (20 mg/kg/day) for duration of
three weeks. Cardiac function and heart tissue were analyzed at six week post-MI.
CD90+ cardiac fibroblasts were isolated from ventricles through enzymatic
digestion of heart. In vivo treatment of CHF animals with Mocetinostat reduced
CHF-dependent up-regulation of HDAC1 and HDAC2 in CHF myocardium, improved
cardiac function and decreased scar size and total collagen amount. Moreover,
expression of pro-fibrotic markers, collagen-1, fibronectin and Connective Tissue
Growth Factor (CTGF) were reduced in the left ventricle (LV) of
Mocetinostat-treated CHF hearts. Cardiac fibroblasts isolated from
Mocetinostat-treated CHF ventricles showed a decrease in expression of collagen I
and III, fibronectin and Timp1. In addition, Mocetinostat attenuated CHF-induced
elevation of IL-6 levels in CHF myocardium and cardiac fibroblasts. In parallel,
levels of pSTAT3 were reduced via Mocetinostat in CHF myocardium. CONCLUSIONS:
Anti-fibrotic effects of Mocetinostat in CHF are associated with the IL-6/STAT3
signaling pathway. In addition, our study demonstrates in vivo regulation of
cardiac fibroblasts via HDAC inhibition.