Fig. 4

Pinocytosis vesicle and pinocytosis in fibroblast-like synoviocytes from patients with rheumatoid arthritis (RA-FLS) and mice with collagen-induced arthritis (CIA-FLSs). A Higher amount of pinocytosis in RA-FLSs than in CIA-FLSs. B Higher numbers of pinocytic vesicles in RA-FLSs than in CIA-FLSs. p < 0.05 was considered statistically significant