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  • Title: Henoch-Schönlein purpura nephritis with nephrotic-range proteinuria: histological regression possibly associated with cyclosporin A and steroid treatment.
    Author: Shin JI, Park JM, Shin YH, Kim JH, Lee JS, Jeong HJ.
    Journal: Scand J Rheumatol; 2005; 34(5):392-5. PubMed ID: 16234188.
    Abstract:
    OBJECTIVE: To clarify the therapeutic role of cyclosporin A (CyA) for patients with Henoch-Schönlein purpura nephritis (HSPN) showing nephrotic-range proteinuria. METHODS: The clinical and histological findings of eight children (7.7+/-3.8 years), who were treated with CyA and prednisolone, were evaluated retrospectively. All underwent a renal biopsy before therapy, and six of the eight patients received a follow-up biopsy after therapy. RESULTS: The histological grade of the International Study of Kidney Disease in Children (ISKDC) was improved in all six patients who received a follow-up biopsy (pre-therapy, four grade IIIa and two grade IIIb; post-therapy, one grade I and five grade II) and it was statistically significant (p = 0.031). The activity index was significantly decreased after therapy (8.3+/-1.6 vs. 3.5+/-1.5, p = 0.031), and the chronicity index (0.5+/-0.5 vs. 0.7+/-1.0) and tubulointerstitial (TI) scores (1.5+/-1.3 vs. 0.8+/-1.6) did not change. There was a reduction in proteinuria from 3.2+/-2.3 to 0.1+/-0.1 g/m2/day (p = 0.008) and renal function remained normal in all patients after therapy. However, one patient showed CyA-induced nephrotoxicity at a second biopsy. After an average follow-up period of 3.8 years, six patients showed normal urine and renal function, and two showed minor urinary abnormalities. CONCLUSION: This study suggests that CyA therapy is effective in reducing proteinuria, which is a known risk factor for the development of renal insufficiency in HSPN and may regress the renal pathology in patients with nephrotic-range proteinuria.
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