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The aim of this study is to examine the effects of acute administration of luseogliflozin, the sodium–glucose cotransporter 2 (SGLT2) inhibitor, on renal hemodynamics and tubular functions in anesthetized non-diabetic Sprague Dawley (SD) rats and 5/6 nephrectomized (Nx) SD rats. Renal blood flow (RBF), mean arterial pressure (MAP), and heart rate (HR) were continuously measured and urine was collected directly from the left ureter. Intraperitoneal injection of luseogliflozin (0.9 mg kg −1 ) did not change MAP, HR, RBF, or creatinine clearance (CrCl) in SD rats ( n  = 7). Luseogliflozin significantly increased urine volume, which was associated with significantly increased urinary glucose excretion rates ( P  &lt; 0.001). Similarly, luseogliflozin significantly increased urinary sodium excretion (from 0.07 ± 0.01 µmol min −1  at baseline to 0.76 ± 0.08 µmol min −1  at 120 min;  P  &lt; 0.001). Furthermore, luseogliflozin resulted in significantly increased urinary pH ( P  &lt; 0.001) and decreased urinary osmolality and urea concentration ( P  &lt; 0.001) in SD rats. Similarly, in Nx SD rats ( n  = 5–6), luseogliflozin significantly increased urine volume and urinary glucose excretion ( P  &lt; 0.001) without altering MAP, HR, RBF, or CrCl. Luseogliflozin did not elicit any significant effects on the other urinary parameters in Nx SD rats. These data indicate that SGLT2 inhibitor elicits direct tubular effects in non-diabetic rats with normal renal functions.

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Responses of renal hemodynamics and tubular functions to acute sodium–glucose cotransporter 2 inhibitor administration in non-diabetic anesthetized rats