LAUSR

e15094Background: NOX-A12 (olaptesed pegol) is a novel inhibitor of the chemokine CXCL12 for treatment of solid tumors. The Opera study (NCT03168139) is a Phase 1/2 open label clinical study to evaluate pharmacodynamic effects and safety of monotherapy with NOX-A12 and safety and efficacy of a combination of NOX-A12 with pembrolizumab in advanced MSS, metastatic colorectal and pancreatic cancer. The study comprises two weeks of NOX-A12 monotherapy followed by repeated 21-day cycles of NOX-A12 plus pembrolizumab. Here we present pharmacodynamic biomarker data from for monotherapy phase with NOX-A12 as well as safety for the combination with pembrolizumab. Methods: Patients received 300 mg NOX-A12 by i.v. infusion on days 1, 4, 8, and 11 of the monotherapy phase. Needle biopsies were taken from suitable liver metastases before treatment and on day 14, peripheral blood was drawn at the same time points. Collected tumor samples were analyzed for immune cell infiltration and cytokine signature. Results: At the...