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  • Title: Mizoribine oral pulse therapy for patients with disease flare of lupus nephritis.
    Author: Tanaka H, Suzuki K, Nakahata T, Tsugawa K, Ito E, Waga S.
    Journal: Clin Nephrol; 2003 Dec; 60(6):390-4. PubMed ID: 14690255.
    Abstract:
    AIM: Mizoribine (MZR) is a newly developed immunosuppressive agent in Japan. To relieve disease flare of lupus nephritis, a prospective pilot study of oral MZR pulse therapy (a phase II trial) is conducted as an alternative therapy to dose up of corticosteroids. METHODS: Six Japanese patients with biopsy-proven lupus nephritis who experienced disease flare were prospectively evaluated. MZR at a dose of 5 - 10 mg/kg per day (up to 500 mg) in 1 or 2 divided daily doses was orally administered twice a week for 3 months. At the time of disease flare, 4 patients had refused to take dose up of corticosteroids, and the other 2 had complained of opportunistic infection. RESULTS: At presentation, urine protein excretion, serum hemolytic complement activity (CH50) and serum anti-dsDNA antibody were 1.9 +/- 0.6 g/day, 15.7 +/- 5.8 U/ml (normal 23 - 46 U/ml) and 164.8 +/- 184.0 IU/ml (normal < 12.0 IU/ml), respectively. Urine protein excretion and serum anti-dsDNA antibody decreased significantly following MZR oral pulse therapy (0.2 +/- 0.1 g/day and 29.7 +/- 23.4 IU/ml (p < 0.05), respectively), and serum CH50 recovered to normal (35.1 +/- 10.4 U/ml, p < 0.05). Moreover, a significant histologic improvement was observed in a patient who received repeat renal biopsies at pre- and post-treatment. Reported peak serum MZR levels enough to inhibit human mixed-lymphocyte reaction (3.0 - 6.0 microg/ml) were achieved in all patients. No serious adverse effects were observed. CONCLUSION: Although we had no control subjects in this series, MZR oral pulse therapy may be of benefit to a proportion of patients with disease flare of lupus nephritis as an alternative therapy to dose up of corticosteroids.
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