TNFRSF13C and pneumocystosis: Compared with the RNA acquired from the lung tissue in WT-PCP mice, we explored 166 mRNAs (39 upregulated and 127 downregulated) and 69 lncRNAs (15 upregulated and 54 downregulated) in BAFF-R–/– PCP mice (Figures 1E–H).