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2017 ; 8
(ä): 69
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Effect of Angiotensin-converting Enzyme Inhibitor on Cardiac Fibrosis and
Oxidative Stress Status in Lipopolysaccharide-induced Inflammation Model in Rats
#MMPMID28966758
Abareshi A
; Norouzi F
; Asgharzadeh F
; Beheshti F
; Hosseini M
; Farzadnia M
; Khazaei M
Int J Prev Med
2017[]; 8
(ä): 69
PMID28966758
show ga
BACKGROUND: Renin-angiotensin (Ang)-aldosterone system not only plays a key role
in the regulation of circulatory homeostasis, but also it acts as a powerful
pro-inflammatory mediator. The aim of this study was to evaluate the effect of
captopril (Cap), a known Ang-converting enzyme inhibitor, on inflammation-induced
cardiac fibrosis, and heart oxidative stress status in lipopolysaccharide
(LPS)-induced inflammation in male rats. METHODS: Fifty male rats were randomly
divided into five groups control, LPS (1 mg/kg/day), LPS + Cap 10 mg/kg, LPS +
Cap 50 mg/kg and LPS + Cap 100 mg/kg. After 2 weeks, blood samples were taken,
and hearts were harvested for evaluation of tumor necrosis factor alpha (TNF-?),
interleukin-6 (IL-6) and nitric oxide metabolite in serum and tissue hemogenate,
histopathology (hematoxylin and eosin and Masson's trichrome) and oxidative
stress status. RESULTS: Serum IL-6 and TNF-? concentration were higher in LPS
group compared to control and Cap reduced them, significantly. Heart TNF-? and
IL-6 contents in LPS group were significantly higher than control (P < 0.05). The
administration of Cap significantly decreased inflammatory markers level to
control (P < 0.05). The higher levels of malondialdehyde and lower antioxidative
markers (total thiol, superoxide dismutase, and catalase) in the heart were
observed in LPS group and treatment by Cap improved them, dose-dependently.
Histopathological study revealed cardiac fibrosis and more collagen content in
LPS group which significantly improved by Cap treatment. CONCLUSIONS: Treatment
by Cap reduced cardiac fibrosis possibly through improving oxidative stress
status, and it can be considered to increase cardiac compliance in this
condition.