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  • Title: Peripheral CD24hi CD27+ CD19+ B cells subset as a potential biomarker in naïve systemic lupus erythematosus.
    Author: Jin L, Weiqian C, Lihuan Y.
    Journal: Int J Rheum Dis; 2013 Dec; 16(6):698-708. PubMed ID: 24286662.
    Abstract:
    AIM: B cells are likely to play critical roles in the pathogenesis of systemic lupus erythematosus (SLE). Our aim was to investigate the role of peripheral CD24(hi) CD27(+) CD19(+) B cells in Chinese patients with new-onset SLE. METHOD: Peripheral CD24(hi) CD27(+) CD19(+) B cells were analyzed in 55 new-onset lupus and 36 healthy controls by flow cytometry. All SLE cases were treated with prednisolone and hydroxychloroquine during a 1-year follow-up. Thirteen cases were added with cyclophosphamide or mycophenolate mofetil. The CD24(hi) CD27(+) CD19(+) B cells were analyzed at days 0, 7, 14 and months 1, 3, 6, 9 and 12. Interleukin-10 (IL-10)-producing B cell was detected in eight naïve lupus and 10 healthy controls. RESULTS: Compared to healthy controls, the frequency and number of primary circulating CD24(hi) CD27(+) CD19(+) B cells was significantly reduced in SLE cases (8.22 ± 3.48% vs. 31.67 ± 5.53%, P < 0.0001; 4.04 ± 2.85 vs. 38.66 ± 10.22 10(3) cells/mL, P = 0.0001) before treatment; IL-10(+) CD19(+) B cells and IL-10(+) CD24(hi) CD27(+) CD19(+) B cells also decreased in SLE. Interestingly, primary CD24(hi) CD27(+) CD19(+) B cells inversely correlated with SLE disease activity index (SLEDAI) score. Patients with arthritis and hematologic disorders had a lower primary CD24(hi) CD27(+) CD19(+) B cells. In 48 SLE cases who finished the 1-year follow-up, the frequency and number of CD24(hi) CD27(+) CD19(+) B cells increased from 8.26 ± 3.61% to 25.51 ± 4.56%; 3.99 ± 2.86 to 28.64 ± 11.81 10(3) cells/mm(3) (P < 0.0001), accompanied by a significantly decreased SLEDAI score. Of note, CD24(hi) CD27(+) CD19(+) B cells decreased in some flare cases with an elevated SLEDAI score. CONCLUSION: These results demonstrate that a lower primary CD24(hi) CD27(+) CD19(+) B cells may be an immunologic aspect of new-onset SLE. CD24(hi) CD27(+) CD19(+) B cells may be a useful tool to evaluate lupus activity and monitor the response to therapy.
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