Recovery and systemic expansion of Pmel T cells with LBH589 also occurs in the absence of tumor. A. Expansion of Pmel T cells treated by the same scheme as shown in Figure 1A, but in non-tumor bearing irradiated hosts. Representative dot plots indicate the percentage and absolute number of splenocytes that are Pmel T cells on day 10 following adoptive cell transfer. B. Analysis of Pmel T cell expansion in both peripheral blood and spleen over time. Pmel T cell expansion in peripheral blood is expressed as the percentage of Pmel T cells in the overall CD8 T cell population days 3, 10, and 21 days following adoptive cell transfer. Results described are representative of at least three experiments with similar results. Student’s t-tests were performed to determine statistical significance between groups.