515MO A Phase I Trial of Durvalumab (durv) in Combination with Olaparib (ola) and Capivasertib (cap) in Patients (pts) with Advanced or Metastatic Cancers (ca) (MEDIPAC)

Tumor-specific homologous recombination (HR) DNA defects and the phosphatidylinositol 3-kinase (PI3K)-AKT pathway are commonly implicated in tumorigenesis, and preclinical studies have shown synergistic effects of poly (ADP-ribose) polymerase (PARP) with PI3K-AKT inhibitors. Both pathways modulate the tumor immune microenvironment by regulation of tumor-infiltrating lymphocytes and reduction of Treg cells. We hypothesized that triplet combination of immunotherapy with PARP and PI3K-AKT pathway inhibition is tolerable and may demonstrate activity in pts with relevant pathway defects.