“MT-8421 represents a novel approach to target CTLA-4 in a wholly distinct manner from the current monoclonal antibody approaches. MT-8421 was designed to eliminate CTLA-4-expressing Tregs in the tumor microenvironment (“TME”) through a direct cell-kill mechanism independent of the effector cell presence that antibodies rely upon while not effecting Tregs in the periphery, the major mechanism of antibody-mediated autoimmune toxicity,” said Eric Poma, Chief Executive Officer and Chief Scientific Officer of MTEM.
