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      Immunoadsorption for Recurrent Primary Focal Segmental Glomerulosclerosis on Kidney Allografts: A Single-Center Experience and Literature Review

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          Introduction: Primary focal and segmental glomerulosclerosis (FSGS) frequently reoccurs on kidney transplants and may lead to premature allograft loss. There are no guidelines for treating FSGS recurrence on allografts; treatment is based on apheresis (plasma exchange plasmapheresis [PP], semi-specific immunoadsorption [IA] with reusable columns) plus rituximab. Objective: We aimed to assess the efficacy of IA to treat recurrent FSGS. Methods: We report on 7 patients with recurrent FSGS on kidney allograft (proteinuria ≥3 g/g of urinary creatinine or ≥3 g/day); they all received IA. Our primary objective was to reduce proteinuria by >50%. Patients’ mean age was 45 ± 10 years. Postoperative immunosuppression relied on steroids, mycophenolate mofetil, tacrolimus, with an induction therapy of basiliximab or antithymocyte globulins. Prophylaxis to prevent FSGS recurrence was either rituximab alone ( n = 3), rituximab plus either PP or IA ( n = 3), or no treatment ( n = 1). Mean follow-up was 20 ± 13 months. There was a median of 72 (14–101) IA sessions per patient, that is, a mean of 14 ± 1 sessions per IA column. Results: At 12 months after starting IA, all patients had partial ( n = 6) or complete ( n = 1) remission, and allograft survival was 100%. The mean reduction in proteinuria within an IA session was 45 ± 15%. At last follow-up, 2 patients are in remission without IA, 3 patients are in partial remission that is IA dependent, and 2 patients lost their allograft due to FSGS recurrence. The most frequent adverse event was cytomegalovirus reactivation ( n = 13), which subsided after valganciclovir therapy. Conclusions: We show that recurrence of FSGS can be controlled long term with IA plus rituximab. However, some patients remained dependent on IA.

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          Author and article information

          Blood Purif
          Blood Purification
          S. Karger AG
          May 2020
          07 January 2020
          : 49
          : 3
          : 322-333
          aService de Néphrologie, Hémodialyse, Aphérèses et Transplantation Rénale, CHU Grenoble-Alpes, Grenoble, France
          bService d’anatomo-Pathologie, CHU Grenoble-Alpes, Grenoble, France
          Author notes
          *Lionel Rostaing, MD, PhD, Service de Néphrologie, Hémodialyse, Aphérèses et Transplantation Rénale, CHU Grenoble-Alpes, CS 10217, FR–38043 Grenoble Cedex 09 (France), E-Mail
          504244 Blood Purif 2020;49:322–333
          © 2020 S. Karger AG, Basel

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          Page count
          Figures: 4, Tables: 2, Pages: 12
          Research Article


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