mMDSCs, but not gMDSCs, express higher levels of TLR8 mRNA. mRNA expression of TLR8 (A), TLR7 (B), and TLR9 (C) on mDC, pDC, mMDSC, and gMDSC in three donors. Columns and bars represents mean (±SE) of duplicate measurements. mMDSC, white column; other cell types, black columns