TE synovium with prelabeled MLS (DiI, red) and varying ratios of unlabeled FLS was cultured for 2 weeks in CTL- or IL-supplemented media and all cells subsequently counterstained with 4′,6-diamidino-2-phenylindole (blue). In both (A) CTL and (B) IL groups, DiI (red) was co-localized with intense CD-14 expression (green). Intimal lining formation was apparent in all groups (A, B), regardless of cell type, with intimal hyperplasia apparent in groups treated with IL (B).