FIGURE 6. IL-12–induced p-STAT4 inhibition is intact in T24D, A50H mutant SOCS3–transduced cells.
(A) Schematic showing experimental design; (B and C) T cells containing empty vector, WT SOCS3, or SOCS3-DH were sorted for CD8+clover+ cells, treated with IL-12 or no cytokine, then lysed and protein subjected to Western blotting to detect p-STAT4 (B) or total STAT4 (C). Whole spleen cells served as a positive control for IL-12–induced p-STAT4. Pervanadate is a protein tyrosine phosphatase inhibitor serving as chemical method to induce STAT4 phosphorylation. Representative data from two to three experiments.