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Background:   Endothelial progenitor cells (EPCs) are known to play a significant role in reendothelialization and vascular repair. Recently, a mineralocorticoid receptor was demonstrated to be expressed by EPCs. The study aimed to evaluate a potential influence of eplerenone treatment on the total number of EPCs in patients with chronic heart failure.Methods:   Eighty-seven male patients with chronic heart failure were included (age: 23–83 years; body mass index 29.1 ± 5.1 kg/m 2 ; New York Heart failure classification (NYHA) I: 29 patients, NYHA II: 32 patients, NYHA III: 26 patients). Numbers of circulating EPCs were quantified immediately using flow cytometry. Twenty-eight patients received therapy with eplerenone. Patients were further characterized by echocardiography, spirometry and laboratory markers.Results:   Patients with ongoing eplerenone administration showed higher levels of circulating cells expressing CD34+ ( p&lt;0.05) and CD34+KDR+ ( p&lt;0.05) and CD34+CD133+KDR+ cells ( p&lt;0.05). The effects of eplerenone treatment could be shown to be independent of NYHA status, genesis of the underlying cardiovascular morbidity, left ventricular function and co-medication.Conclusion:   Patients with chronic heart failure treated with eplerenone show higher numbers of EPCs. The clinical benefit for treatment with eplerenone has been demonstrated even for patients with mild heart failure and might be partially mediated by EPCs.

Positive effect of eplerenone treatment on endothelial progenitor cells in patients with chronic heart failure