MUC1 and neoplasm: In addition, Baigain et al. found that transgenic T cells co‐expressed with the rabbit recombinant monoclonal MUC1 antibody (HMFG2) scFv and 4/7ICR (an inverted cytokine receptor) could selectively expand and provide robust and prolonged cytotoxic activity in MUC1+ MDA MB 468 cell lines and IL4‐producing MDA MB 468 tumour‐bearing animals in vivo.