Expression of complement regulatory proteins on cultured FLS of patients with different forms of arthritis.

<p>CD55, CD46, and CD59 expression was measured by flow cytometry on cultured FLS from patients with RA, OA, PsA, and SpA. Indicated is the fold difference in mean fluorescence intensity (MFI) over respective isotype control Ig (cMFI) (mean, n = 4−5).