Journal
INTERNATIONAL UROLOGY AND NEPHROLOGY
Volume 52, Issue 7, Pages 1377-1387Publisher
SPRINGER
DOI: 10.1007/s11255-020-02462-6
Keywords
Rituximab; Plasmapheresis; Plasma exchange; Immunoadsorption; Focal segmental glomerulosclerosis; Kidney transplant; Nephrotic syndrome
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Purpose To demonstrate the efficacy of combined rituximab and plasmapheresis (PP)/plasma exchange (PE) therapy for focal segmental glomerulosclerosis in transplanted kidneys (ptFSGS). Methods We searched MEDLINE, SCOPUS, and Cochrane Library for eligible publications. Only observational studies or clinical trials containing patients' age > 18 years were included for full-text extraction. Results A total of eight observational studies (n = 85) were included in meta-analyses. With a median follow-up of 18 months (IQR 4.4), combination therapy of RTX-PP/PE in patients with ptFSGS resulted in overall remission rate of 72.7% (95% CI 52.3-86.6%) with a significant reduction of proteinuria and serum creatinine levels. Complete remission was 41.0%, while partial remission was 31.7%. The mean difference of serum creatinine levels between pre- and post-treatment was - 0.65 mg/dL (95% CI - 1.15 to - 0.14). The mean difference of the degree of proteinuria between pre- and post-treatment was - 4.79 g/day (95% CI - 7.02 to - 2.56). Subgroup analyses were performed after adjusted for study year, type of intervention, and primary pre-transplant lesion. Patients with recurrent FSGS tended have lesser reduction in the degree of proteinuria compared to patients with de novo FSGS. Incidence of serious adverse events with combined RTX-PP/PE therapy was 0.12 event/year. Conclusion We conclude that combined RTX-PP/PE therapy may be considered as an alternative treatment of ptFSGS in achieving remission by lowering proteinuria and serum creatinine levels. However, the efficacy of combined RTX-PP/PE therapy must be confirmed in randomized-controlled trials.
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