Dionísio LM, Luvizoto MJ, Gribner C, Carneiro D, Carvalho V, Robes F, Sheidemantel M, Rego F, Noronha LD, Pecoits-Filho R, Hauser AB. Biomarkers of cardio-renal syndrome in uremic myocardiopathy animal model.
ACTA ACUST UNITED AC 2018;
40:105-111. [PMID:
29738042 PMCID:
PMC6533987 DOI:
10.1590/2175-8239-jbn-3878]
[Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2017] [Accepted: 09/28/2017] [Indexed: 11/24/2022]
Abstract
Introduction:
Cardio-renal syndrome subtype 4 (CRS4) is a condition of primary chronic
kidney disease that leads to reduction of cardiac function, ventricular
hypertrophy, and risk of cardiovascular events. Objective: Our aim was to
understand the mechanisms involved on the onset of CRS4.
Methods:
We used the nephrectomy 5/6 (CKD) animal model and compared to control
(SHAM). Serum biomarkers were analyzed at baseline, 4, and 8 weeks. After
euthanasia, histology and immunohistochemistry were performed in the
myocardium.
Results:
Troponin I (TnI) was increased at 4 weeks (W) and 8W, but nt-proBNP showed no
difference. The greater diameter of cardiomyocytes indicated left
ventricular hypertrophy and the highest levels of TNF-α were found at 4W
declining in 8W while fibrosis was more intense in 8W. Angiotensin
expression showed an increase at 8W.
Conclusions:
TnI seems to reflect cardiac injury as a consequence of the CKD however
nt-proBNP did not change because it reflects stretching. TNF-α characterized
an inflammatory peak and fibrosis increased over time in a process
connecting heart and kidneys. The angiotensin showed increased activity of
the renin-angiotensin axis and corroborates the hypothesis that the
inflammatory process and its involvement with CRS4. Therefore, this animal
study reinforces the need for renin-angiotensin blockade strategies and the
control of CKD to avoid the development of CRS4.
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