A Clinical Study of the Efficacy and Safety of Chidamide in Combination With Camrelizumab and Carboplatin or Capecitabine in the Second and Third Line Treatment of Relapsed/Metastatic Triple-negative Breast Cancer

1. Previously treated with histone deacetylase inhibitors (HDACi)

2. Previously treated with pd-1/pd-l1 inhibitors

3. Untreated imaging confirmed central nervous system metastasis (except asymptomatic brain metastasis)

4. Patients who have received systematic, radical brain or meningeal metastasis treatment (radiotherapy or surgery) in the past, but have been stable for at least 4 weeks as confirmed by imaging, have stopped systemic hormone treatment for more than 2 weeks, and have no clinical symptoms can be included

5. There were ascites, pleural effusion and pericardial effusion with clinical symptoms in the baseline period, requiring drainage, or serous effusion drainage within 4 weeks before the first dose

6. Inability to swallow, intestinal obstruction or other factors affecting drug administration and absorption

7. Systematic treatment such as chemotherapy, molecular targeted therapy or other clinical trial drugs were received within 4 weeks before enrollment, except for observational studies

8. Prior malignancy active within the previous 5 years (except for curable cancers, such as or Non-Melanocytic Tumors of the Skin or carcinoma in situ of the cervix)

9. Had major surgical operation or obvious trauma within 4 weeks before enrollment, or it is expected that the patient will receive major surgical treatment

10. Allergy to the drug components of this study

11. Active HBV and HCV infection; Except for the patients with stable hepatitis B (DNA titer shall not be higher than 500 IU/ml or copy number \<1000 copies/ml) and cured hepatitis C (HCV RNA detection is negative)

12. History of immunodeficiency, including HIV test positive, or suffer from other acquired or congenital immunodeficiency diseases, or have a history of organ transplantation

13. Any heart disease, including (1) angina pectoris; (2) Arrhythmia requiring medication or clinically significant; (3) Myocardial infarction; (4) Heart failure; (5) Any other heart disease judged by the researcher as unsuitable for the test; The severity of abnormal cardiac or renal function in screening period is ≥ II

14. Pregnant women, lactating women or fertile women , Or subjects of childbearing age who are unwilling to take effective contraceptive measures during the study period and at least 3 months after the last dose

15. According to the judgment of the investigator, there are concomitant diseases that seriously endanger the safety of the patient or affect the completion of the study (such as severe hypertension, diabetes, thyroid disease, active infection, etc.)

16. History of neurological or mental disorders, including epilepsy or dementia

17. The investigator determined who was not suitable for the study.

What this study is about