Re-challenge Immunotherapy With Cromolyn, TQB2102, and Panpulimab in Immune-Refractory Triple Negative Breast Cancer

This is a phase II, open-Label, single-arm, multicenter clinical trial investigating the efficacy and safety of cromolyn for potentiating ADC combined with immunotherapy in refractory triple-negative breast cancer. Based on previous findings, the infiltration level of antigen-presenting mast cells (apMCs) was significantly correlated with clinical benefits from immunotherapy. Cromolyn, a mast cell membrane stabilizer, demonstrated promising efficacy in the phase II "Renaissance" clinical study. Among 10 patients with anti-PD-1/PD-L1-resistant TNBC, the combination of cromolyn with chemotherapy and immunotherapy achieved an objective response rate (ORR) of 50%. To further validate these findings, we have designed this study to enroll TNBC patients who have progressed after conventional treatments (including chemotherapy, immunotherapy, ADC, etc.), with the aim of further investigating the synergistic effects of cromolyn sodium combined with ADC and PD-1 monoclonal antibody against refractory TNBC tumors at the clinical level.