ASN004 was studied in a tumor xenograft model derived from the A431 (human cervical epidermoid, 5T4+; 88,000 binding sites per cell) tumor cell line….Complete tumor growth regression was observed for three ASN004 dose groups...Similar results were obtained for a xenograft model derived from the high 5T4-expressing MDA-MB-231-5T4OE (transfectant, human breast carcinoma, 5T4+++; 16,000,000 binding sites per cell) cell line (Fig. 3B).