LAMP1 and rheumatoid arthritis: Thus, the ability of mAbs to up-regulate the expression of CD107a on CD3−CD56+ NK cells was greater in RA compared with SLE, such that the mean fold difference in samples incubated with RTX, OBZ-PG LALA, OBZGly and OBZ compared with samples incubated without mAbs was 1.2, 1.5, 1.9 and 3.1, respectively, in RA and 1.5, 0.8, 1.4 and 1.8, respectively, in SLE (Fig. 4C).