In the CD30-positive non-Hodgkin's lymphoma model, the MTS assay revealed similar efficacy for brentuximab vedotin and MF-BTX-MMAE (IC50 ≈ 0.1 nM) on Karpas-299 cell line. In vivo, the treatment with MF-BTX-MMAE was well tolerated at all tested doses (0.5 and 1 mg/kg). The single treatment with MF-BTX-MMAE had a marked, dose dependent, anti-tumoral efficacy with 40% and 100% of animals showing complete regression at the end of the study (9 weeks after treatment) for doses of 0.5 mg/kg and 1 mg/kg respectively.