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The homeostatic chemokine CCL21 predicts mortality in aortic stenosis patients and modulates left ventricular remodeling

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Item Type:Article
Title:The homeostatic chemokine CCL21 predicts mortality in aortic stenosis patients and modulates left ventricular remodeling
Creators Name:Finsen, A.V. and Ueland, T. and Sjaastad, I. and Ranheim, T. and Ahmed, M.S. and Dahl, C.P. and Askevold, E.T. and Aakhus, S. and Husberg, C. and Fiane, A.E. and Lipp, M. and Gullestad, L. and Christensen, G. and Aukrust, P. and Yndestad, A.
Abstract:BACKGROUND: CCL21 acting through CCR7, is termed a homeostatic chemokine. Based on its role in concerting immunological responses and its proposed involvement in tissue remodeling, we hypothesized that this chemokine could play a role in myocardial remodeling during left ventricular (LV) pressure overload. METHODS AND RESULTS: Our main findings were: (i) Serum levels of CCL21 were markedly raised in patients with symptomatic aortic stenosis (AS, n = 136) as compared with healthy controls (n = 20). (ii) A CCL21 level in the highest tertile was independently associated with all-cause mortality in these patients. (iii) Immunostaining suggested the presence of CCR7 on macrophages, endothelial cells and fibroblasts within calcified human aortic valves. (iv). Mice exposed to LV pressure overload showed enhanced myocardial expression of CCL21 and CCR7 mRNA, and increased CCL21 protein levels. (v) CCR7-/- mice subjected to three weeks of LV pressure overload had similar heart weights compared to wild type mice, but increased LV dilatation and reduced wall thickness. CONCLUSIONS: Our studies, combining experiments in clinical and experimental LV pressure overload, suggest that CCL21/CCR7 interactions might be involved in the response to pressure overload secondary to AS.
Keywords:Aortic Valve, Aortic Valve Stenosis, Calcinosis, CCR7 Receptors, Chemokine CCL21, Collagen, Electrocardiography, Homeostasis, Immunohistochemistry, Inbred C57BL Mice, Matrix Metalloproteinase 2, Matrix Metalloproteinase 9, Myocardium, Pressure, Messenger RNA, Pathologic Dilatation, Ventricular Remodeling, Animals, Mice
Source:PLoS ONE
ISSN:1932-6203
Publisher:Public Library of Science (U.S.A.)
Volume:9
Number:11
Page Range:e112172
Date:14 November 2014
Official Publication:https://doi.org/10.1371/journal.pone.0112172
PubMed:View item in PubMed

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