The actions of aldosterone are usually divided into persistent genomic mediated by the classical mineralocorticoid receptor versus acute nongenomic actions. Rapid, nongenomic effects of aldosterone have been shown in a variety of tissues, although the physiological relevance of these nongenomic actions remains to be established. There is now growing evidence that both the nongenomic and genomic actions of aldosterone, are mediated via the same classical mineralocorticoid receptor, and there is cross talk between the nongenomic and classical actions of steroid hormones. Activation of tissue-specific, second messenger pathways may contribute to integration of nongenomic and classical actions of aldosterone. Further studies are required to determine the physiological or pathophysiological role of these nongenomic actions of aldosterone and whether they might amplify pathophysiological effects of aldosterone.
- Mineralocorticoid receptor
- Protein kinase C (PKC)
- Sodium pump
- Sodium-potassium-chloride cotransporter