Abstract
Aldosterone is implicated in the pathogenesis of heart failure. Cardiac hypertrophy precedes heart failure and is its major risk factor. In this study, we examined whether aldosterone directly induces cardiac hypertrophy and, if so, whether sodium and Na+/H+ exchanger 1 (NHE1) are involved in this mechanism process.The sodium concentration in our culture mediums was altered within a physiological range from 141mEq/L to 146mEq/L. Cardiac hypertrophy was evaluated by measuring cell sizes, the level of incorporation of 3H-leucine and by the level of B-type natriuretic peptide (BNP) gene expression.
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