IFNG and tuberculosis: To further identify whether the inhibition of IFN-γ production of NKT cells was due to accumulated MDSCs in livers of TB (B16) mice, we depleted MDSCs of TB (B16) mice by anti-Gr-1 antibody or transferred 5 × 105 TB (B16) hepatic MDSCs into WT mice followed by Con A injection at indicated times.