T cells promote tumor growth.

<p>(A and B) WT and CD3epsilon^−/− mice were analyzed 14 days after tumor transplant. Spleen and pooled LN (inguinal, axillary, brachial) cells were stained for flow cytometry. (A) Plots are gated on live cells and numbers indicate the frequency of GFP⁺CD19⁺ tumor cells present in each organ. (B) The number of tumor cells in the LN and spleen in WT and CD3epsilon^−/− mice was determined by flow cytometry (n = 11–19 pooled from at least 3 independent experiments). (C and D) The frequency (C) and number (D) of tumor cells present in the LN on day 14 was determined by flow cytometry for WT, TCRdelta^−/−, and TCRbeta^−/− mice (n = 13–14 pooled from 3 independent experiments). *p<.05, **p<.01, ***p<.001.