MsrB1 promotes the production of IL-12 by DCs in vitro. (A) WT and MsrB1−/− BMDCs were stimulated with LPS for the indicated times (n = 3 per group) and their transcript levels of IL-12a, IL-12b, TNF, IL-1b, IL-6, and IL-10 were analyzed by qRT-PCR. (B) The intracellular IL-12p40/70 levels in WT and MsrB1−/− BMDCs at the indicated time points after LPS stimulation (n = 3 per group) were measured by flow cytometry with gating on the CD11c+CD11b+ cells in the live cells. (C) The extracellular levels of IL-12p70 in the BMDC cultures were measured by ELISA (n = 3 per group). Mean ± SEM are shown. * p < 0.05, ** p < 0.01, *** p < 0.001; ns, not significant, as determined by unpaired t-test. The data are representative of two experiments, which had similar results.