A single-arm, multi-center, open, phase II study of chidamide combined with toripalimab in refractory and advanced soft-tissue sarcoma

Soft tissue sarcoma is a relatively rare malignant tumor with an incidence of about 1-2/100,000. The best way to obtain evidence-based medical evidence is to participate in clinical trials with new drugs (especially targeted drugs and immunotherapy). Chidamide, an oral subtype-selective histone deacetylase inhibitor monotherapy was effective on the patients with hematological tumors by inhibiting HDAC activity and other ways, showing good anti-tumor activity. Histone deacetylase inhibitors (HDACi) may also reverse drug resistance or inefficiency of immunoassay inhibitors, and combination therapy has shown preliminary efficacy in a variety of tumors.Because of the poor prognosis of advanced soft tissue sarcoma, there is no standard second-line treatment. Therefore, we think it is necessary to explore the feasibility of combination of chidamide and Toripalimab monoclonal antibody in advanced, refractory and progressive soft tissue sarcoma after failure of standard treatment, and look forward to further improving the efficacy of soft tissue sarcoma.