A Study of First-line JS001 and Nab-paclitaxel Versus Palcelbo and Nab-Paclitaxel in Participants With Advanced Recurrent or Metastatic TNBC

A Phase III, Multicenter, Randomized, Placebo-Controlled Study of JS001 (Anti-PD-1 Antibody) in Combination With Nab-Paclitaxel Compared With Placebo With Nab-Paclitaxel as First-line Therapy for Patients With Primarily Diagnose or Recurrent and Metastatic Triple-Negative Breast Cancer

This multicenter, randomized, double-blind study will evaluate the efficacy, safety of JS001 administered with nab-paclitaxel compared with placebo in combination with nab-paclitaxel as first-line therapy in participants with primarily diagnosed stage IV and recurrent or metastatic triple-negative breast cancer (TNBC) who have not received prior systemic therapy for metastatic breast cancer (mBC).

Inclusion Criteria:

1. Primarily diagnosed stage IV or recurrent and metastatic, histologically documented TNBC characterized by absence of human epidermal growth factor 2 (HER2), estrogen receptor (ER), and progesterone receptor (PR) expression;
2. No prior chemotherapy or targeted systemic therapy for inoperable stage IV or metastatic TNBC；
3. Eligible for taxane monotherapy；
4. Eastern Cooperative Oncology Group performance status of 0 or 1；
5. Measurable disease as defined by RECIST v1.1；
6. Adequate hematologic and end-organ function。

Exclusion Criteria:

1. Known central nervous system (CNS) disease with active syndrome or untreated disease, except for treated asymptomatic CNS metastases；
2. History of autoimmune disease；
3. History of Anaphylaxis to PD-(L)1 antibody or CTLA-4 antibody or paclitaxel;
4. Prior allogeneic stem cell or solid organ transplantation;
5. Active hepatitis B or hepatitis C;
6. Positive of HIV antibody.