Dapagliflozin for the Treatment of Collagenofibrotic Glomerulopathy

Collagenofibrotic glomerulopathy is a rare, incurable kidney disease characterized by severe proteinuria and extensive type III collagen deposition in mesangial and subendothelial spaces. To date, no effective treatment has yet been reported. A 45-year-old Japanese woman was treated daily with 10 mg dapagliflozin. Her eGFR slope improved from -3.61 mL/min/1.73 m²/year over 4 years before treatment to 0.11 mL/min/1.73 m²/year after 3 years of treatment. Additionally, her nephrotic-range proteinuria, initially exceeding 4 g/gCr, decreased to <2 g/gCr after dapagliflozin treatment. To our knowledge, this is the first documented case of effective treatment for collagenofibrotic glomerulopathy.