Overexpression of TROP2 (trophoblast cell surface antigen 2) in advanced gastric cancer has been identified as a poor prognostic factor. SKB264 (MK-2870) is a TROP2 ADC (Antibody-Drug Conjugate) designed with a unique linker to attach the payload, a belotecan-derivative topoisomerase I inhibitor. This linker undergoes cleavage in response to both extracellular pH and intracellular enzymes within tumor cells, facilitating efficient release of the payload both inside tumor cells and within the tumor microenvironment, thereby exerting its anti-tumor effects.
As of November 22, 2023, 48 patients with advanced gastric cancer were enrolled in a Phase 2 study evaluating S...