Sutro Biopharma Demonstrates STRO-002's Immune-Modulating Properties at AACR 2020

Sutro Biopharma, Inc. (NASDAQ: STRO), a clinical-stage drug discovery, development and manufacturing company focused on the application of precise protein engineering and rational design to create next-generation oncology therapeutics, today announced the presentation of new preclinical data for its folate receptor alpha (FolRα) targeting antibody-drug conjugate, STRO-002, at the 2020 American Association for Cancer Research (AACR) Virtual Annual Meeting II from June 22-24, 2020. The data, being presented by Sutro's Chief Scientific Officer, Trevor Hallam, Ph.D., demonstrates STRO-002's immune-modulating properties and potentiation by PD-L1 blockade. The results of the study showed that in FolRα positive tumor cells, STRO-002 treatment induced hallmarks of immunogenic cell death, killing tumor cells while activating immune cells, including monocytes. When combined in mouse tumor models with avelumab, an anti-human & mouse PD-L1 monoclonal antibody, the combination treatment enhanced efficacy leading to more complete responses and increased killer T cells, than either agent alone. Importantly, the data suggest that a single dose of STRO-002 when combined with a PD-1/PD-L1 blockade could provide an effective and protective anti-tumor immune response.