Primary aldosteronism (PA) and endothelial progenitor cell (EPC) bioavailability
Article first published online: 10 APR 2008
© 2008 The Authors. Journal compilation © 2008 Blackwell Publishing Ltd
Volume 69, Issue 4, pages 528–534, October 2008
How to Cite
Verhovez, A., Zeoli, A., Williams, T. A., Morello, F., Brizzi, M. F., Veglio, F. and Mulatero, P. (2008), Primary aldosteronism (PA) and endothelial progenitor cell (EPC) bioavailability. Clinical Endocrinology, 69: 528–534. doi: 10.1111/j.1365-2265.2008.03271.x
- Issue published online: 10 SEP 2008
- Article first published online: 10 APR 2008
- (Received 14 February 2008; returned for revision 4 March 2008; finally revised 24 March 2008; accepted 26 March 2008)
Objective Patients with primary aldosteronism (PA) experience more cardiovascular events than patients with essential hypertension matched for risk factor profile. Endothelial progenitor cells (EPC) represent a bone marrow-derived cell population implicated in vascular healing whose number correlates to the cardiovascular risk factor profile. Aldosterone has been reported to decrease EPC proliferation in rats.
Design and patients We assessed (i) the growth characteristics of EPC from six PA patients and six matched normotensive controls; (ii) the growth characteristics of EPC treated with increasing doses of aldosterone.
Measurements Senescence and cell-cycle analysis of EPC from PA patients and normotensive controls and of aldosterone-treated EPC from healthy volunteers.
Results No difference was found in the senescence rate between EPC from PA patients (72·4% senescent cells) and controls (70·7%, P > 0·05). No difference was also found in the cell-cycle distribution determined by FACS (controls: 75·2% cells in G0/G1 phase; PA: 73·5%, P > 0·05). Incubation of EPC with aldosterone did not modify their senescence rate (controls: 72·4% senescent cells; aldosterone 10 nmol/l: 70·9%; aldosterone 100 nmol/l 71·6%, P > 0·05 for all comparisons) and cell-cycle distribution (controls: 73·3% cells in G0/G1 phase; aldosterone 10 nmol/l: 74·9%; aldosterone 100 nmol/l: 75·4%, P > 0·05 for all comparisons). No expression of the mineralocorticoid receptor (MR) transcript was found in EPC by RT-PCR analysis.
Conclusions High aldosterone levels, both in PA patients and in vitro, exert no direct or indirect effect on EPC growth characteristics.