Single-cell RNAseq and flow cytometry data confirmed activation and infiltration of both innate and adaptive immune cells. ACTM-838 showed durable anti-tumor efficacy in multiple murine tumor models and synergized with anti-PD1 therapy in combination.
Analyses of public RNAseq datasets from patients with primary or metastatic disease revealed cancer types with high levels of myeloid infiltration and adenosine enrichment, suggesting that ACTM-838 efficacy could provide benefit in these indications.ACTM-838 is a novel immunotherapy delivering IL-15plex + eSTING payloads to phagocytic APCs, inducing a durable anti-tumor immune response, after IV dosing. It possesses a compelling safety profile, and is currently in IND-enabling, preclinical development.