In an NUGC‑4‑CLDN18.2 xenograft tumor model, the antitumor efficacy and toxicity of the mAb (SYSA1801mAb), as well as the ADC (SYSA1801) and RDC ([177Lu]Lu‑DOTA‑SYSA1801mAb), and their combinations in different sequences (ADC→RDC and RDC→ADC), were systematically assessed...Furthermore, sequential combination therapy that starts with ADC appears to be more favorable than approaches that start with RDC. Although ADC→RDC sequential therapy did not significantly outperform ADC monotherapy in this model, it may serve as an effective subsequent treatment strategy.
Tecotabart vedotin demonstrated encouraging anti-tumor activity and manageable safety in CLDN18.2-positive G/GEJ cancer, supporting further clinical development in gastrointestinal malignancies.