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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Front+Pharmacol
2016 ; 7
(ä): 408
Nephropedia Template TP
gab.com Text
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English Wikipedia
The Protective Effects of Ivabradine in Preventing Progression from Viral
Myocarditis to Dilated Cardiomyopathy
#MMPMID27847478
Yue-Chun L
; Guang-Yi C
; Li-Sha G
; Chao X
; Xinqiao T
; Cong L
; Xiao-Ya D
; Xiangjun Y
Front Pharmacol
2016[]; 7
(ä): 408
PMID27847478
show ga
To study the beneficial effects of ivabradine in dilated cardiomyopathy (DCM)
mice, which evolved from coxsackievirus B3-induced chronic viral myocarditis.
Four-to-five-week-old male balb/c mice were inoculated intraperitoneally with
coxsackievirus B3 (Strain Nancy) on days 1, 14, and 28. The day of the first
virus inoculation was defined as day 1. Thirty-five days later, the surviving
chronic viral myocarditis mice were divided randomly into two groups, a treatment
group and an untreated group. Ivabradine was administered by gavage for 30
consecutive days in the treatment group, and the untreated group was administered
normal saline. Masson's trichrome stain was used to evaluate the fibrosis degree
in myocardial tissue. The expression levels of tumor necrosis factor-? (TNF-?),
interleukin-1? (IL-1?), interleukin-6 (IL-6), collagen I, collagen III and
p38-MAPK signaling pathway proteins were detected by Western blot.
Electrocardiogram was used to investigate the heart rate and rhythm. The
thickness of the ventricular septum and left ventricular posterior wall, left
ventricular end diastolic dimension, left ventricular end systolic dimension,
left ventricular ejection fractions and fractional shortening were studied by
echocardiography. Compared with the untreated chronic viral myocarditis mice,
ivabradine significantly increased the survival rate, attenuated the myocardial
lesions and fibrosis, improved the impairment of the left ventricular function,
diminished the heart dimension, decreased the production of collagen I and
collagen III, reduced the expression of the proinflammatory cytokines TNF-?,
IL-1?, and IL-6, and lowered the production of phospho-p38 MAPK. The findings
indicate the therapeutic effect of ivabradine in preventing the progression from
viral myocarditis to DCM in mice with chronic viral myocarditis induced by
coxsackievirus B3, is associated with inhibition of the p38 MAPK pathway,
downregulated inflammatory responses and decreased collagen expression.
Ivabradine appears a promising approach for the treatment of patients with viral
myocarditis.