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Aldosterone and Ion Channels #MMPMID30678852
Valinsky WC; Touyz RM; Shrier A
Vitam Horm 2019[]; 109 (ä): 105-131 PMID30678852show ga
Since its discovery, aldosterone and ion modulation have been entwined. While scientific investigations throughout the decades have emphasized aldosterone's connection to Na(+), K(+), and H(+) homeostasis, more recent research has demonstrated a relationship between aldosterone and Mg(2+), Ca(2+), and Cl(-) homeostasis. The mechanisms connecting aldosterone to ion regulation frequently involve ion channels; the membrane localized proteins containing at least one aqueous pore for ion conduction. In order to precisely control intracellular or intraorganelle ion concentrations, ion channels have evolved highly specific regions within the conduction pore that select ions by charge, size, and/or dehydration energy requirement, meaning aldosterone must be able to modulate multiple ion channels to regulate the many ions described above. The list of ion channels presently connected to aldosterone includes ENaC (Na(+)), ROMK/BK (K(+)), TRPV4/5/6 (Ca(2+)), TRPM7/6 (Mg(2+)), and ClC-K/CFTR (Cl(-)), among others. This list is only expected to grow over time, as the promiscuity of aldosterone becomes more understood.