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  • Title: Peripheral blood CD5+ B cell subset in the remission phase of systemic connective tissue diseases.
    Author: Markeljević J, Batinić D, Uzarević B, Bozikov J, Cikes N, Babić-Naglić D, Horvat Z, Marusić M.
    Journal: J Rheumatol; 1994 Dec; 21(12):2225-30. PubMed ID: 7535356.
    Abstract:
    OBJECTIVE: To get a better insight into the level of circulating CD5+ B cells as related to the systemic connective tissue disease activity. METHODS: Peripheral blood CD5+CD19+ cells of patients in the remission phase of systemic lupus erythematosus (SLE) (n = 28), Sjögren's syndrome (SS) (n = 20), rheumatoid arthritis (RA) (n = 26), and 19 control healthy subjects were analyzed by 2-color flow cytometry. RESULTS: In comparison to control group, the patients with SLE had a significant increase in the relative CD19+CD5+ blood cell count (p < 0.0005); this count was also different from the finding in both RA (p < 0.005) and patients with SS (p < 0.05). In contrast, the proportion of B cells expressing CD5 (within an individual B cell population) was significantly increased in all the 3 diseases compared to healthy subjects (SLE, p < 0.0001; SS, p < 0.05; and RA, p < 0.01). In the multivariate discriminant analysis, a discriminant function defined by the CD19+CD5+ subset strongly discriminated SLE, SS and RA from the control, but also SLE from both SS and RA. CONCLUSION: Our findings demonstrated that, in relation to healthy control subjects, the blood CD5+ B subset tended to be elevated in the patients in the remission phase of systemic connective tissue diseases, particularly in SLE.
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