Abstract
Background and Aims
Steroid-dependent nephrotic syndrome (SDNS) may require a prolonged multi-drug therapy with risk of drug toxicity and renal failure. Rituximab (RTX) treatment has been found to be helpful in reducing the steroid dosage and the need for immunosuppressants (ISs), but little data are currently available regarding very long-term outcomes in adults. We herein describe a long-term, single-center experience of RTX use in a large series of adults with SDNS.
Method
We studied 23 adult patients with SDNS (mean age 54.2±17.1 y; 65% male; BMI 28.5±4.7), mostly consequent to membranous (47.8%) or focal glomerulonephritis (30.2 %) who were eligible to start a RTX regimen. Before entering the RTX protocol, proteinuria and eGFR were 7.06±3.87 g/24h and 65.9±28.2 ml/min/1.73 m2, respectively; albumin and CD19/CD20 ratio were 2.9±0.9 g/L and 0.99±0.01 respectively; the mean number of ISs was 2.39±0.89 and the mean annual rate of relapses was 2.2±0.9.
Results
Patients were followed over a mean follow-up of 64 months (range: 12-144). After RTX (mean dose: 1202.1±372.4 mg) the rate of relapses was virtually nullified (p<0.001). eGFR remained roughly stable (62.1±19.8 ml/min/1.73 m2, p=NS), while proteinuria, albumin, CD19/CD20 and BMI all significantly improved (p ranging from 0.01 to 0.001). The mean number of additional ISs was also reduced (0.44±0.12; p<0.001) and RTX enabled discontinuation of steroids in 13/23 (56.5%) patients. No major adverse events related to therapy were recorded.
Conclusion
Findings from this large case-series with a remarkable very long follow-up reinforce the role of RTX as an efficient and safe weapon to improve outcomes in adult patients suffering from SDNS.
Long-term results of children diagnosed with idiopathic nephrotic syndrome; single center experience
