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Published on: November 8, 2015
Predictors of response and relapse in patients with idiopathic membranous nephropathy treated with tacrolimus
Jara Caro1, Elena Gutiérrez-Solís1, Jorge Rojas-Rivera2
1Hospital Universitario 12 de Octubre, Madrid, Spain.
Insights
Tacrolimus monotherapy effectively treats idiopathic membranous nephropathy (MN), achieving high remission rates. However, relapses are common, particularly in patients with partial remission, and can be reduced by extending the tacrolimus tapering period.
Area of Science:
- Nephrology
- Immunosuppressive therapy
Background:
- Idiopathic membranous nephropathy (MN) treatment guidelines recommend tacrolimus.
- Factors influencing tacrolimus response and relapse in MN remain unclear.
Purpose of the Study:
- To investigate factors affecting response and relapse in idiopathic membranous nephropathy patients treated with tacrolimus.
- To evaluate the efficacy and safety of tacrolimus monotherapy for MN.
Main Methods:
- A multicenter study involving 122 MN patients with nephrotic syndrome and stable renal function.
- Patients received tacrolimus treatment for an average of 17.6 months, including full-dose and tapering phases.
Main Results:
- Remission rates reached 84% at 18 months; lower baseline proteinuria predicted better remission.
- Forty-four percent of responders relapsed, with higher proteinuria at tapering onset and shorter tapering periods predicting relapse.
- Tacrolimus demonstrated good tolerance with few adverse events.
Conclusions:
- Tacrolimus monotherapy is effective and safe for MN in patients with stable renal function.
- Frequent relapses in partial remission patients can be mitigated by a longer tacrolimus tapering duration.
Background:
Although tacrolimus is recommended by KDIGO Clinical Practice Guideline for Glomerulonephritis for the treatment of idiopathic membranous nephropathy (MN), little is known about factors that influence response and relapse of the disease after tacrolimus therapy.
Methods:
Multicentre study that collected 122 MN patients with nephrotic syndrome and stable renal function treated with tacrolimus. Duration of treatment was 17.6 ± 7.2 months, including a full-dose and a tapering period.
Results:
The percentage of remission was 60, 78 and 84% after 6, 12 and 18 months of treatment, respectively. The amount of proteinuria at baseline significantly predicted remission, the lower the baseline proteinuria the higher the probability of remission. Only 10 patients (8%) received concomitantly corticosteroids, and their rate of remission was similar (80% at 18 months). Among responders, 42% achieved complete remission (CR) and 58% partial remission (PR). Almost half (44%) of the responder patients relapsed. The amount of proteinuria at the onset of tacrolimus tapering was significantly higher in relapsing patients. By multivariable analysis, the presence of a PR versus CR at the onset of tacrolimus tapering and a shorter duration of the tapering period significantly predicted relapses. Tolerance was good and the number of adverse events low.
Conclusions:
Tacrolimus monotherapy is an effective and safe option for the treatment of MN with stable renal function. Relapses are frequent in patients with PR and can be partially prevented by a longer tapering period.
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