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  • Title: Comparison of Lupus Nephritis Induction Treatments in a Hispanic Population: A Single-center Cohort Analysis.
    Author: Mejía-Vilet JM, Arreola-Guerra JM, Córdova-Sánchez BM, Morales-Buenrostro LE, Uribe-Uribe NO, Correa-Rotter R.
    Journal: J Rheumatol; 2015 Nov; 42(11):2082-91. PubMed ID: 26373566.
    Abstract:
    OBJECTIVE: To evaluate response rates in an adult lupus nephritis (LN) cohort in Mexico City, Mexico. METHODS: We analyzed 165 patients with biopsy-proven LN histological International Society of Nephrology/Renal Pathology Society classes III, IV, or V, distributed by treatment drug in 3 groups: mycophenolate mofetil (MMF; dosage > 2 g/day per 6 mos, n = 63), intravenous cyclophosphamide (IVC; 0.7 g/m(2) body surface area monthly per 6 pulses, n = 66), or azathioprine (AZA; dosage > 1.5 mg/kg/day per 6 mos, n = 36). Median followup was 31 ± 18 months. The primary endpoint was the proportion of patients achieving complete renal response (CR). Secondary endpoints included the proportion of patients achieving renal response (complete or partial), renal flare-free survival, doubling of serum creatinine, and progression to endstage renal disease (ESRD). RESULTS: MMF induction was superior to IVC (HR 2.00, 95% CI 1.23-3.25, p = 0.005) and AZA (HR 2.12, 95% CI 1.23-3.66, p = 0.007) in the primary endpoint. Censored CR rates at 6, 12, 24, and 36 months were 32.6%, 56.1%, 76.6%, and 94.1% for MMF; 24.2%, 34.4%, 57.9%, and 62.1% for IVC; and 8.4%, 39.8%, 49.7%, and 49.7% for AZA. MMF was also superior in renal response to treatment and renal flare-free survival outcomes. There were no differences between groups in doubling of serum creatinine or progression to ESRD. The induction treatment with MMF (HR 2.04, 95% CI 1.25-3.33, p = 0.005) and absence of vascular lesions on renal biopsy (HR 2.05, 95% CI 1.25-3.37, p = 0.004) were associated with CR, whereas proteinuria at the time of presentation was negatively associated with CR (HR 0.91, 95% CI 0.84-0.98, p = 0.013). CONCLUSION: MMF induction therapy is superior to IVC and AZA in patients with LN of Mexican-mestizo race.
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