Fig. 3.
Maturation of dendritic cells induced by MCM is irreversible. GM-CSF/IL-4–treated ER− cells were cultured for 4 days in medium alone [−MCM], two different MCM preparations (MCM A and B), or a combination of cytokines equal to that present in the MCM. On day 11, the cells were washed and analyzed for CD83 expression. Residual cells were returned to culture for 3 more days (day 14) in the absence of further supplementation and analyzed for the retention of CD83. MCM contained the following cytokines: (A) IL-1 (92 ng/mL), IL-6 (1 μg/mL), IFN-α (0.02 ng/mL), and TNF-α (182 ng/mL); (B) IL-1 (20 ng/mL), IL-6 (734 ng/mL), IFN-α (.08 ng/mL), and TNF-α (24 ng/mL).