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Short-term outcomes of severe lupus nephritis in a cohort of predominantly African–American children

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Abstract

Renal involvement is one of the major determinants of the outcome in patients with systemic lupus erythematosus. Although African–American ethnicity has been suggested to be a poor prognostic factor in severe lupus nephritis in adult patients, information on outcomes of African–American children with this disease is still very limited. We retrospectively studied the patients diagnosed with severe lupus nephritis by renal biopsy at Le Bonheur Children’s Medical Center from January 1990 to December 2003. All patients were below the age of 18 years at the time of biopsy. Clinical features assessed included age, gender, race, estimated glomerular filtration rate (GFR), presence of hypertension, gross hematuria, degree of proteinuria, complement 3 and 4 levels, serum albumin, renal histology and dose of oral prednisone. Forty-four patients were studied: 82% were African–American and 89% were female. Mean age at biopsy was 14.2±3 years (median 15.0 years; range 4.7 years to 17.0 years). Renal biopsies were assessed according to the WHO classification. Twenty-seven percent, 43%, and 30% were in class III, IV and V, respectively. At presentation, 55% had hypertension and 23% had a history of macroscopic hematuria. The patients had varying degrees of proteinuria, including 18% with nephrotic syndrome. Eighteen percent had moderate renal insufficiency with estimated GFRs less than 50 ml/1.73m2 body surface area per minute. All the patients were treated with corticosteroids. Sixty-eight percent also received cyclophosphamide and 20% received either mycophenolate mofetil (MMF) or azathioprine (AZA). Two patients developed end stage renal disease and required chronic dialysis within 12 months of biopsy. At the 12-month follow-up visit, 23% of patients had complete remission and 48% had partial remission. The mean estimated GFR had increased from 96.0 ml/1.73m2 per minute to 124 ml/1.73m2 per minute (P=0.03). Mean serum creatinine levels decreased from 1.62 mg/dl to 0.91 mg/dl (P=0.03). Complement 3 levels increased from 54.3 mg/dl to 90.3 mg/dl (P<0.01). Mean serum albumin levels also increased from 2.8 mg/dl to 3.6 mg/dl (P<0.01) and urine protein-to-creatinine ratio decreased from 5.8 to 1.0 (P<0.01). The average prednisone dose decreased from 0.96 mg/kg per day to 0.41 mg/kg per day (P=0.64). In our center, with predominantly African–American children, patients with lupus nephritis presented similarly to those in other studies with predominantly Caucasian patients, and short-term renal outcomes were not different.

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Authors and Affiliations

  1. Department of Pediatrics, Le Bonheur Children’s Medical Center, Room 301, West Patient Tower, 50 North Dunlap, Memphis, Tennessee, TN 38103, USA

    Keith K. Lau, Deborah P. Jones, Margaret C. Hastings & Bettina H. Ault

  2. Department of Pathology, University of Tennessee Health Science Center, Memphis, Tennessee, USA

    Lillian W. Gaber

  3. Children’s Foundation Research Center, Le Bonheur Children’s Medical Center, Memphis, Tennessee, USA

    Keith K. Lau, Deborah P. Jones, Margaret C. Hastings & Bettina H. Ault

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  1. Keith K. Lau
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  2. Deborah P. Jones
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Correspondence to Keith K. Lau.

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Lau, K.K., Jones, D.P., Hastings, M.C. et al. Short-term outcomes of severe lupus nephritis in a cohort of predominantly African–American children. Pediatr Nephrol 21, 655–662 (2006). https://doi.org/10.1007/s00467-006-0060-3

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