Furthermore, T-cells from GM+R848+LPS conditioned PBMC driven by either SEA2 or SEA1 long peptides not only specifically recognized one or both of these sensitizing peptides at restimulation, but also preferentially lysed the HLA-A2.1+ human breast cancer line MDA-MB-231 transduced to express MUC1 (Figure 5B). This evidence concerns the gene MUC1 and breast carcinoma.