Aldosterone stimulates the cardiac sodium/bicarbonate cotransporter via activation of the g protein-coupled receptor gpr30.

DE GIUSTI VC,; ORLOWSKI A; CIANCIO MC, ; ESPEJO MS; GONANO LA; CALDIZ CI ; VILA PETROFF MG; VILLA-ABRILLE MC,; AIELLO EA

JOURNAL OF MOLECULAR AND CELLULAR CARDIOLOGY

ACADEMIC PRESS LTD-ELSEVIER SCIENCE LTD

Lugar: Amsterdam; Año: 2015

0022-2828

Some cardiac non-genomic effects of aldosterone (Ald) are reported to be mediated through activation of the classic mineralocorticoid receptor (MR). However, in the last years, it was proposed that activation of the novel G protein-coupled receptor GPR30 mediates certain non-genomic effects of Ald. The aim of this study was to elucidate if the sodium/bicarbonate cotransporter (NBC) is stimulated by Ald and if the activation of GPR30 mediates this effect. NBC activity was evaluated in rat cardiomyocytes perfused with HCO3-/CO2 solution in the continuous presence of HOE642 (sodium/hydrogen exchanger blocker) during recovery from acidosis using intracellular fluorescence measurements. Ald enhanced NBC activity (% of ΔJHCO3-; control: 100±5.82%, n=7 vs Ald: 151.88±11.02%, n=5; P