Abstract

Proteinuria is a predictor of end-stage renal disease. The effectiveness of an angiotensin-converting enzyme inhibitor or an angiotensin II receptor blocker for the reduction in urinary protein excretion and renoprotection in proteinuric chronic kidney disease patients is well known, and coadministration of and sodium-glucose cotransporter inhibitor and the mineralocorticoid receptor blocker eplerenone has recently demonstrated an additive albuminuria-lowering effect in chronic kidney disease patients. Proteinuria is also an independent predictor of end-stage renal disease in kidney transplant recipients. Sodium-glucose cotransporter 2 inhibitors were administered to a 60-year-old man with chronic allograft kidney disease who had increasing urinary protein excretion with valsartan treatment. Although urinary protein excretion decreased drastically, it later increased to the same levels. A nonsteroidal mineralocorticoid receptor blocker, esaxerenone, was added to these medications, again resulting in a decrease in urinary protein excretion. Although the long-term renoprotective effect is not known, these medicines are promising and safe agents to reduce urinary protein excretion in patients with chronic allograft kidney disease.

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