A murine model of increased coronary sinus pressure induces myocardial edema with cardiac lymphatic dilation and fibrosis.

American Journal of Physiology. Heart and Circulatory Physiology
Natalie R NielsenKathleen M Caron

Abstract

Myocardial edema is a consequence of many cardiovascular stressors, including myocardial infarction, cardiac bypass surgery, and hypertension. The aim of this study was to establish a murine model of myocardial edema and elucidate the response of cardiac lymphatics and the myocardium. Myocardial edema without infarction was induced in mice by cauterizing the coronary sinus, increasing pressure in the coronary venous system, and inducing myocardial edema. In male mice, there was rapid development of edema 3 h following coronary sinus cauterization (CSC), with associated dilation of cardiac lymphatics. By 24 h, males displayed significant cardiovascular contractile dysfunction. In contrast, female mice exhibited a temporal delay in the formation of myocardial edema, with onset of cardiovascular dysfunction by 24 h. Furthermore, myocardial edema induced a ring of fibrosis around the epicardial surface of the left ventricle in both sexes that included fibroblasts, immune cells, and increased lymphatics. Interestingly, the pattern of fibrosis and the cells that make up the fibrotic epicardial ring differ between sexes. We conclude that a novel surgical model of myocardial edema without infarct was established in mice. Cardiac lympha...Continue Reading

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Citations

May 8, 2020·International Journal of Molecular Sciences·Coralie FontaineBarbara Garmy-Susini
Jan 28, 2021·Annual Review of Medicine·Wenjing XuKathleen M Caron
Aug 2, 2021·Trends in Molecular Medicine·Simon StrittTaija Mäkinen
Aug 18, 2021·The Journal of Clinical Investigation·T C Stevenson KellerMark L Kahn

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AB_531893
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Prism
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