Open-Label, Biomarker-Integrated Umbrella Trial for First-Line Treatment of Extensive-stage Small Cell Lung Cancer

This is an open-label umbrella study conducted in first treatment ES-SCLC patients, employing a novel umbrella trial design (biomarker-integrated multi-arm trial with a shared ICI+chemotherapy control arm). Eligible patients were assigned to trial arms based on biomarker expression levels. Biomarker subgroups were defined as: (1) High ASCL1/NEUROD1/DLL3 expression: DLL3-CAR-NK cells combined with ICI + etoposide + carboplatin (DLL3 group); (2) Myc overexpression: XPO1 inhibitor selinexor combined with ICI + etoposide + carboplatin (XPO1 group); (3) VIM/AXL high expression group treated with anlotinib combined with ICI + etoposide + carboplatin (anlotinib group).