Figure 3

IFN-γ production by NK cells and macrophages that were derived from B6-+/+, or B6-mi/mi mice. Freshly isolated NK 1.1+ cells (a), cultured NK cells (b), peritoneal macrophages (c), and cultured Mac-1+ cells (d) were cultured with IL-12, IL-18, or IL-12 plus IL-18 for 5 h. Cultured NK cells (b) and cultured Mac-1+ cells (d) were also cultured in the presence of PMA-ionomycin. The culture supernatants were subjected to ELISA.