FIGURE 10.

Acute ICV administration of IL-1β activates Fyn and PTK activities in splenic T cells. Rats (3/group) were implanted with ICV cannulas 1 wk prior to single injection of 5 μl of aCSF (CON) or IL-1β (50 ng/kg). Spleen cells were isolated and the extracts were resolved by Western blotting and visualized by anti-phosphotyrosine antibodies for PTK activity (A). The extracts were also immunoprecipitated with an anti-Fyn antibody, and the immunoprecipitates were used to determine Fyn kinase activity as described in Materials and Methods. Representative blots are shown in the figures.