Abstract

Backgroundand Aim:Rituximab is a novel therapy that can help patients with steroid-dependent or resistant nephrotic syndrome.The aim of this study was to evaluate the efficacy of rituximab in children with corticosteroid-dependent and resistant nephrotic syndrome and to determine the factors associated with its efficacy. Methods:In this study, 40 children with corticosteroid-dependent or resistant nephrotic syndrome who were treated with rituximab in Dr. Sheikh Hospital,Mashhad,between 2014 and 2018 were enrolled. Patients with a history of hematuria, severe urinary tract infection, or secondary nephrotic syndrome were excluded. Results:The mean age of patients was 11.9 ± 5.04 years, and 55% were female. The most common underlying pathology of nephrotic syndrome was focal segmental glomerulonephritis (FSGS) (42.5%) followed by membranoproliferative glomerulonephritis (MPGN) and minimal change disease (MCD). Most of the participants (62.5%) were steroid-dependent and the rest (27.5%) were steroid resistant. Only 10% of the patients showed complications following rituximab administration and 57.5% went into complete remission. A negative family history and steroid-dependent nephrotic syndrome were significantly associated with a better treatment response. Moreover, patients with steroid-resistant nephrotic syndrome were more likely to have a positive family history, while factors associated with steroid response included underlying pathology, gender, and family history. Conclusion: Rituximab can cause remission in more than half of the patients with steroid-resistant or dependent nephrotic syndrome. Moreover, the only factors that reduce response to rituximab are a history of corticosteroid resistance and a positive family history of nephrotic syndrome.

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