TNF and rheumatoid arthritis: In addition, the number of cells that migrated toward CCL11 siRNA-transfected and TNF-α stimulated RA FLS-conditioned medium was lower than the number that migrated toward control siRNA-transfected and TNF-α stimulated RA FLS-conditioned medium (mean ± SEM, number of cells per field; 31.9 ± 3.6 and 66.9 ± 16.0, respectively, p < 0.05, Fig. 6C).