Oral glucose tolerance test (A), SBP (B), renal MBG excretion (C), and activity of Na/K-ATPase (NKA) in erythrocytes (D) in control group (Ctrl), in rats on a high salt intake (Ctrl NaCl), in those with DM (STZ), and in those with DM on a high NaCl intake (STZ NaCl). Data presented as mean ± SEM of 8 individual measurements. By repeated-measures analysis of variance and Bonferroni’s test (A): *P < 0.05, **P < 0.01 versus baseline (0 minutes). By 2-way analysis of variance (B–E): *P < 0.05, **P < 0.01 versus Ctrl.