Abstract
Background
Treatment of IgA nephropathy (IgAN) in Japan has recently changed, from oral prednisolone (oPSL) to tonsillectomy plus steroid pulse (TSP) therapy. However, a few studies have compared their efficacy and safety.
Methods
IgAN patients diagnosed in our institution between 1991 and 2013, treated with TSP or oPSL, aged ≥16 years, with ≥1 g/day proteinuria, and estimated glomerular filtration rate (eGFR) ≥30 ml/min/1.73 m2, and no other renal disease were selected. Baseline clinical and histological findings, clinical outcomes, and adverse events were compared. Clinical remission (CR) was defined as <0.3 g/day proteinuria and <5 urinary red blood cells per high-powered field.
Results
Sixty-six patients were identified; after propensity score adjustment, 26 patients were selected in each group. CR rates were significantly higher at 12 (30.8 % vs. 3.9 %), 36 (47.3 % vs. 7.9 %), and 72 (57.8 % vs. 20.1 %) months (p < 0.01), and the renal survival rate, defined as the development of a 25 % reduction from baseline eGFR, was significantly higher at 12 (96.2 % vs. 69.2 %), 36 (96.2 % vs. 61.5 %), and 72 (96.2 % vs. 41.0 %) months in the TSP than the oPSL group (p < 0.001). Multivariate analysis showed that TSP was the only independent factor associated with CR (hazard ratio, 3.58; 95 % confidence interval, 1.32–10.91, p = 0.01). The number of patients with adverse events was significant lower in TSP group than in oPSL group (11.5 % vs. 34.6 %, p = 0.04).
Conclusions
CR rates are higher; protection of renal function and prevention from adverse events were superior with TSP than with oPSL in patients with IgAN and moderate-to-severe proteinuria.
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All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee at which the studies were conducted (IRB approval number #3738) and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
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“Informed consent for renal biopsy was obtained from all individual participants included in the study.”
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Hoshino, Y., Moriyama, T., Uchida, K. et al. Comparison of oral steroids with tonsillectomy plus steroid pulse therapy in patients with IgA nephropathy. Clin Exp Nephrol 21, 617–623 (2017). https://doi.org/10.1007/s10157-016-1324-2
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DOI: https://doi.org/10.1007/s10157-016-1324-2