CD226 and systemic lupus erythematosus: Of the 48 SLE patients examined, 10 were in an active state and 16 were in LLDAS at baseline, and the percentage of CD226+ B cells was higher in an active state than in LLDAS [32.4% (19.3–64.2) vs 18.8% (13.4–30.7); P = 0.078].