Bleske BE, Hwang HS, Zineh I, Ghannam MG, Boluyt MO. Evaluation of immunomodulatory biomarkers in a pressure overload model of heart failure.
Pharmacotherapy 2007;
27:504-9. [PMID:
17381376 DOI:
10.1592/phco.27.4.504]
[Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
STUDY OBJECTIVES
To characterize the immunomodulatory response in a pressure overload model of heart failure, and to further validate this animal model of human heart failure.
DESIGN
Randomized, controlled, animal study.
SETTING
Large university research facility.
ANIMALS
Twenty-seven, male, Sprague-Dawley rats.
INTERVENTION
The rats underwent either aortic constriction or a sham procedure.
MEASUREMENTS AND MAIN RESULTS
Six months after the surgical procedure, echocardiographic measurements were obtained, the animals were sacrificed, and plasma samples were taken to measure concentrations of biomarkers. As six (40%) of the 15 rats in the aortic-constriction group died before the 6 months, only nine rats from this group underwent immunomodulatory evaluation. Compared with the sham procedure, aortic constriction increased the left ventricle:body weight ratio in the rats (p=0.0016) It also decreased the velocity of circumferential shortening (p=0.08) and increased myocardial expression of atrial natriuretic factor, beta-myosin heavy chain, and fibronectin (p<0.05). Concentrations of the proinflammatory mediator interleukin (IL)-1beta and the counterregulatory mediator IL-10 also significantly increased (p<0.04) in the group that underwent aortic constriction compared with the group that underwent the sham procedure. Nonsignificant increases (mean change approximately 50-180%) were also observed for IL-2, IL-6, and leptin concentrations.
CONCLUSIONS
In this classic animal model of heart failure, a systemic immunomodulatory response was evaluated after 6 months of pressure overload resulting in myocardial decompensation and, in some cases, mortality. The findings are similar to the immunomodulatory response that may be observed in human heart failure. These novel results further define this model of heart failure and suggest another aspect of its relevance to human heart failure with regard to pressure overload and the immunomodulatory response.
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