Common Variable Immunodeficiency in Systemic Lupus Erythematosus
Section snippets
Literature Review
A review of the published literature using a search of the entire PubMed database made available by the National Library of Medicine was undertaken. The search included articles from 1982 to 2005. Key articles on SLE and hypogammaglobulinemia were identified, and additional articles of interest were selected from the bibliographies of the published literature.
Flow Cytometry Analysis
Flow cytometry analysis to identify lymphocyte subsets was performed in our 2 SLE patients with CVID and 38 SLE patients without CVID.
Case 1
In June 2002, an 18-year-old white woman was admitted to our hospital with the diagnosis of epilepsy and SLE, characterized by malar rash, serositis, fever, abdominal pain, and hemolytic anemia with a positive Coombs test. Symptoms were controlled with intravenous (IV) high doses of methylprednisolone. After discharge, she was treated with prednisone (20 mg/d) and azathioprine (50 mg/12 h). Despite this treatment, her disease remained active, with malar rash, diffuse alopecia, and
Flow cytometry analysis
Lymphocyte subsets in these 2 patients were compared with the percentage of these cells in 38 patients with SLE without CVID. No differences in the percentage of CD3+CD4+, CD3+CD8+ cells nor in the CD4/CD8 ratio were observed. The main differences found were that both patients had a lower percentage of natural killer cells (4 and 5%, respectively, in contrast with 14% in SLE patients without CVID) and an almost absent number of B-cells (≤1%), as shown in Table 1 and Fig. 1.
Literature review
During the last 24 years (1982 to 2006) detailed descriptions of 16 SLE patients with CVID were reported in 10 articles in the English literature (1, 2, 3, 4, 5, 6, 7, 8, 9, 10). These patients, together with the 2 described above, are included in this review (Table 2). It is difficult to estimate the prevalence and incidence of CVID in SLE from case reports and small series.
Sixteen patients of the 18 included in this review were women (89%), with a mean age at onset of SLE of 23.8 years (range
Discussion
Excluding selective IgA deficiency, CVID is recognized as the most prevalent primary immunodeficiency disease. Search of English medical literature identified detailed descriptions of 16 SLE patients with CVID (1, 2, 3, 4, 5, 6, 7, 8, 9, 10). It is clear that definite conclusions cannot be drawn from such a review of individual cases. In addition, details were occasionally missing from some of the cases in the literature. Nevertheless, some valuable information and practical points can be
Acknowledgment
Susana Mellor-Pita is funded by the Instituto de Salud Carlos III (N CM04/00161).
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The authors have no conflicts of interest to disclose.