Histochemistry and blood analyses of perforin^−/−DC-Fas^−/− mice. (A) Spleen sections of 7-week-old perforin^−/−DC-Fas^−/− and control mice were stained with anti-CD3 and anti-B220, or anti-CD11c. Scale bar: 50 μm. (B) Section of lung, liver, and kidney from 7-week-old perforin^−/−DC-Fas^−/− and control mice were used for H&E staining. Scale bar: 50 μm. (C) Blood analyses of 7-week-old perforin^−/−DC-Fas^−/− and control mice. WT versus perforin^−/−DC-Fas^−/−: **P < .01 (n = 5).