DLN T cells activated with B/I and cultured with IL-2, IL-21, IL-2/21, IL-7/15 or IL-7/15/21 for 7 days were harvested and cultured for 24 h alone or with irradiated 4T1 murine mammary carcinoma cells to stimulate IFN-γ release. The gene discussed is IL7; the disease is breast carcinoma.