Benzinga | Mar 24, 2021 07:32AM EDT

Actinium Announces Initiation Of Patient Enrollment In Iomab-ACT Trial For Targeted Conditioning Prior To CD19 CAR T-Cell Therapy

Actinium Pharmaceuticals, Inc. (NYSE:ATNM) ("Actinium" or the "Company") today announced that its collaborator, Memorial Sloan Kettering Cancer Center ("MSK"), has commenced patient enrollment in the Phase 1 study evaluating Iomab-ACT for targeted conditioning prior to treatment with MSK's CD19 targeted CAR T-cell 19-28z. Iomab-ACT is a low dose version of Actinium's Phase 3 drug candidate Iomab-B, a CD45 targeting antibody radiation conjugate ("ARC"). Actinium and MSK were jointly awarded National Institutes of Health Small Business Technology Transfer grant funding for this first ever trial to evaluate ARC-based targeted conditioning prior to CAR-T therapy. The scientific rationale for this trial builds on preclinical data published in 2020 and is further supported by clinical observations from the SIERRA trial to justify combining MSK's 19-28z CAR T-cell therapy with Iomab-ACT. Manufacturing of patient CAR T-cells has commenced and patient conditioning with Iomab-ACT followed by 19-28z CAR T-cell infusion is expected early in the second quarter of 2021, with proof-of-concept data expected in the second half of 2021.