diABZI STING agonist-1 (trihydrochloride) is stimulator of interferon genes (STING) receptor agonist.

STING (human):130 nM (EC50), STING (mouse):200 ng /mL (EC50), H69AR cells:0.035 μM (EC50)

To evaluate the potential therapeutic effects of systemically administered diABZI STING agonist-1 trihydrochloride, tested the efficacy of intravenously delivered diABZI STING in a syngeneic mouse model of colorectal tumours (CT-26) in BALB/c mice.?We first established the pharmacokinetic profile of STING in BALB/c mice following intravenous injection of 3 mg/kg .?STING exhibited systemic exposure with a half-life of 1.4 h and achieved systemic concentrations greater than the half-maximal effective concentration (EC50) for mouse STING (~200 ng/ml).?Next, we tested an intermittent dosing paradigm in which 1.5 mg/kg STING was injected intravenously on days 1, 4, and 8 in mice with approximately 100 mm^3 subcutaneous CT-26 tumours.?Treatment with STING resulted in significant tumour growth inhibition as measured by tumour volume AUC analysis (P<0.001), and significantly improved survival (P<0.001) with 8 out of 10 mice remaining tumour free at the end of the study on day 43.