diABZI STING agonist-1 is an agonist of the stimulator of interferon genes (STING) pathway. It induces secretion of IFN-β in human peripheral blood mononuclear cells (PBMCs; EC50 = 130 nM). diABZI STING agonist-1 (2.5 mg/kg) increases serum levels of IFN-β, IL-6, TNF, and KC/GROα in wild-type, but not Sting-/-, mice. It inhibits the cytopathic effect of the common cold human coronavirus 229E (HCoV-229E) in infected MRC-5 cells (EC50 = 3 nM). diABZI STING agonist-1 also decreases the level of severe acute respiratory coronavirus 2 (SARS-CoV-2) RNA in primary human bronchial airway epithelial cells in an air-liquid interface assay. It decreases tumor volume and increases survival in a CT26 murine colorectal cancer model when administered at a dose of 3 mg/kg.
