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      Short-term effects of rituximab in children with steroid- and calcineurin-dependent nephrotic syndrome: a randomized controlled trial.

      Clinical journal of the American Society of Nephrology : CJASN

      Antibodies, Monoclonal, Murine-Derived, Adolescent, administration & dosage, adverse effects, Calcineurin, metabolism, Calcineurin Inhibitors, Child, Drug Administration Schedule, Drug Therapy, Combination, Enzyme Inhibitors, Female, Humans, Immunosuppressive Agents, Italy, Kaplan-Meier Estimate, Logistic Models, Male, Nephrotic Syndrome, drug therapy, enzymology, Odds Ratio, Proteinuria, Recurrence, Remission Induction, Risk Assessment, Risk Factors, Steroids, Time Factors, Treatment Outcome

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          Abstract

          Prednisone and calcineurin inhibitors are the mainstay therapy of idiopathic nephrotic syndrome (INS) in children. However, drug dependence and toxicity associated with protracted use are common. Case series suggest that the anti-CD20 monoclonal antibody rituximab (RTX) may maintain disease remission. This open-label randomized controlled trial was powered to show that a strategy based on RTX and lower doses of prednisone and calcineurin inhibitors was noninferior to standard doses of these agents in maintaining 3-month proteinuria as low as baseline or up to 1 g/d greater (noninferiority margin). Participants were stratified by the presence of toxicity to prednisone/calcineurin inhibitors and centrally assigned to add RTX (Mabthera, 375 mg/m(2) intravenously) to lower doses of standard agents or to continue with current therapy alone. The risk of relapse was a secondary outcome. Fifty-four children (mean age 11 ± 4 years) with INS dependent on prednisone and calcineurin inhibitors for >12 months were randomized. Three-month proteinuria was 70% lower in the RTX arm (95% confidence interval 35% to 86%) as compared with standard therapy arm (intention-to-treat); relapse rates were 18.5% (intervention) and 48.1% (standard arm) (P = 0.029). Probabilities of being drug-free at 3 months were 62.9% and 3.7%, respectively (P < 0.001); 50% of RTX cases were in stable remission without drugs after 9 months. Rituximab and lower doses of prednisone and calcineurin inhibitors are noninferior to standard therapy in maintaining short-term remission in children with INS dependent on both drugs and allow their temporary withdrawal.

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          Author and article information

          Journal
          21566104
          3109926
          10.2215/CJN.09421010

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