Urinary K+ (A), plasma K+ (B), urinary Na+ (C), plasma Na+ (D), and immunoblotting (E), and densitometric analysis (F) of α-ENaC, β-ENaC, γ-ENaC, ROMK, α-BK, and α-NKA in the renal cortex in K+-loaded ADX rats treated with or without PRO20. Expression was normalized by β-actin; n = 4 per group. Data are expressed as means ± SE *P < 0.05 vs. NK, **P < 0.01 vs. NK, ***P < 0.001 vs. NK, #P < 0.05 vs. HK, ##P < 0.01 vs. HK, and ###P < 0.001 vs. HK.