Two cases of antinuclear antibody negative lupus showing increased proportion of B cells lacking RP105.

Koarada, Syuichi; Ide, Masaru; Haruta, Yoshio; Tada, Yoshifumi; Ushiyama, Osamu; Morito, Fumitaka; Ohta, Akihide; Nagasawa, Kohei · J Rheumatol · 2005

case_report · Level V

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Abstract

B cells lacking RP105 molecule, a member of the Toll-like receptor family, were increased in the peripheral blood of 2 patients with antinuclear antibody (ANA) negative systemic lupus erythematosus (SLE). The increased proportion of RP105-lacking B cells was associated with disease activity in patients with ANA-negative SLE. When there are no significant serological markers for SLE, analysis of expression of RP105 may be helpful in evaluation of activity in ANA-negative SLE. We describe a new approach, using phenotyping of B cells, to evaluate activity of ANA-negative SLE.

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