4.6 Article

Apheresis in Adult With Refractory Idiopathic Nephrotic Syndrome on Native Kidneys

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KIDNEY INTERNATIONAL REPORTS
卷 6, 期 8, 页码 2134-2143

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ELSEVIER SCIENCE INC
DOI: 10.1016/j.ekir.2021.04.029

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apheresis; focal segmental glomerulosclerosis; minimal change nephrotic syndrome; nephrotic syndrome

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This retrospective study showed that apheresis may lead to remission in adult patients with refractory INS, especially in those at risk of renal failure and with limited sensitivity to medical treatments, if apheresis is initiated within a year of diagnosis.
Background: Apheresis is the gold standard for idiopathic nephrotic syndrome (INS) relapse after transplantation, but it remains unknown whether such treatment is useful for adults with refractory INS on native kidneys. Methods: This retrospective study included patients older than 16 years with biopsy-proven refractory (persistent nephrotic syndrome on corticosteroids plus at least 1 immunosuppressive drug) INS treated by apheresis and followed for at least 3 months. Results: Between September 1997 and January 2020, 21 patients (focal segmental glomerulosclerosis: 12, minimal change nephrotic syndrome: 9, men: 67%, median age: 34 years) were identified. At last follow-up (12 months), 7 of 21 patients were in complete or partial remission. Remission was associated with older age (51 vs. 30 years, P = 0.05), lower proteinuria (3.9 vs. 7.3 g/d, P = 0.03), and lower estimated glomerular filtration rate (eGFR) (28.0 vs. 48.5 ml/min per 1.73 m2, P = 0.05) at apheresis. The need for dialysis before apheresis (odds ratio [OR] 22.0 [1.00-524], P = 0.026), age $50 years (OR: 22.6 [1.00-524], P = 0.006), a marked (>4.5 g/d) decrease in proteinuria (OR: 9.17 [1.15-73.2], P = 0.041), and a short (<12 months) time between diagnosis and apheresis (OR: 10.8 [1-117], P = 0.043) were significantly associated with remission. Three of 7 patients in remission who were initially on dialysis became dialysis-free; by contrast, none of the 14 patients without remission was initially on dialysis, but 5 of 14 had become dialysis-dependent (P = 0.01). Conclusion: Apheresis may result in remission in adult patients with refractory INS, particularly in those at risk of renal failure, with limited sensitivity to medical treatments, if apheresis is initiated within a year of diagnosis.

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