RecruitingPhase 1Biological interventionStudy of Autologous CAR-T Cells Targeting B7-H3 in TNBC iC9-CAR.B7-H3 T CellsThis phase 1, single-center, open-label study explores the safety of escalating doses of chimeric antigen receptor T cells (CAR-T) cells in subjects with relapsed/refractory triple-negative breast cancer (TNBC).