FIG. 2.

Expression of CD154, CD40, and IGTP in resident peritoneal cells obtained from naïve and primed WT, CD40^−/−, and IFN-γR^−/− mice. A total of 2 × 10⁶ PECs obtained from WT, CD40^−/−, and IFN-γR^−/− naïve mice (n = 2) or primed mice (n = 4) were stained with the indicated antibodies. (A) Frequency of CD154 expression by CD4 T cells. (B) Frequency of CD40⁺ F4/80⁺ macrophages. (C) Frequency of macrophages expressing intracellular IGTP. Experiments were repeated at least three times with primed mice. KO, knockout.