MMP9 and sarcoidosis: We did not detect any relevant change in MMP-9 activity of AMs derived from patients with active sarcoidosis in presence of TL1A (22.10 ± 4.03 and 22.73 ± 4.46, in absence and presence of TL1A, respectively; p: not significant), probably due to an already achieved peak of MMP-9 production and release by these strongly activated macrophages.