Abstract:
Objective To evaluate the efficacy and safety of dapagliflozin on edema in patients with diabetic kidney disease (DKD) at differential status of renal function.
Methods From January 1, 2020 to June 31, 2021, 56 patients with edema in presence of DKD on a daily oral dose of dapagliflozin 10 mg were reviewed retrospectively. According to the levels of estimated glomerular filtration rate (eGFR), they were assigned into three groups of chronic kidney disease (CKD) stage 1-2 (eGFR≥60 mL·min−1·(1.73m2)−1, n=15), CKD stage 3 (60 mL·min−1·(1.73m2)−1> eGFR≥ 30 mL·min−1·(1.73m2)−1, n=18) and CKD stage 4-5 (eGFR<30 mL·min−1·(1.73m2)−1, n=23). Various doses of diuretics were added based upon the severity of edema. Edema score, 24 h urine volume, weight, urine glucose, 24 h urine sodium, blood creatinine, blood urea nitrogen, eGFR and dialysis status were accessed by a digital record system.
Results The baseline profiles were as follows: mean age (55.77±1.67)years, mean body weight (70.45±2.17)kg, mean edema score 2.00(2.00, 3.00), 24 h urine volume 0.98(0.88, 1.37)L, 24 h urine sodium (147.24±7.48)mmol, positive urine glucose value 1.00(0, 2.00) and mean eGFR (44.63±4.06)mL·min−1·(1.73m2)−1. In comparison to baseline levels, 7-day treatment lowered markedly weight (70.45±2.17)kg vs (64.07±1.55)kg, P<0.001 and edema score 2.00(2.00, 3.00) vs 1.00(1.00, 1.00), P<0.001. Whereas, 24 h urine volume 0.98(0.88, 1.37)L vs 2.50(2.28±2.50)L, P<0.001, 24 h urine sodium (147.24±7.48)mmol vs (271.79±8.81)mmol, P<0.001 and urinary glycemic index 1.00(0,2.00) vs 3.00(1.00, 3.00), P<0.001 spiked greatly. Follow-up data showed no significant change in edema index at Month 3/6 post-treatment as compared to that at Day 7 post-treatment (P<0.001). There was no significant change in weight at Month 3/6 post-treatment as compared to that at Day 7 post-treatment (P<0.001) and no significant change in 24 h urine volume at Month 3/6 post-treatment as compared to that at Day 7 post-treatment (P<0.05). And 24 h urine volume at Month 3/6 post-treatment was not statistically different from that at Day 7 post-treatment. Efficacy analysis revealed no statistically significant differences among groups with differential status of renal function at Day 7 and Month 3 post-treatment and overall treatment efficiency was significantly lower in patients with CKD stage 4-5 than that in those with CKD stage 1-2 and CKD stage 3 at Month 6 post-treatment (χ2=12.766, P=0.002). The incidence of heart failure events was significantly more frequent in CKD3/4-5 patients than in CKD1-2 counterparts during the study period (P<0.01).
Conclusion Initial treatment of dapagliflozin is effective and safe for improving edema and boosting urine volume in patients with DKD at CKD 1-5 stage within Month 3 post-treatment. At Month 6 post-treatment, dapagliflozin is less effective for correcting edema and heart failure status of DKD patients at CKD stage 4-5.