Short-term Sintilimab in Combination With Taxane and Carboplatin for Neoadjuvant Therapy in Triple-negative Breast Cancer

Inclusion Criteria:

1. Age: 18-70 years, female;
2. Unilateral, invasive, primary breast cancer, T≥1cm, cN0-3, M0;
3. Immunohistochemistry(IHC): ER, PR\<10%; HER-2 IHC "0", OR IHC "+", OR IHC "++" AND fluorescence in situ hybridization (FISH) negative;
4. At least one measurable lesion according to RECIST V1.1;
5. Newly or recently-collected core needle biopsy specimen of the primary lesion available for PD-L1 status determination;
6. ECOG score 0 or 1 within 10 days prior to drug administration;
7. Currently not pregnant or breastfeeding, and meet at least one of the following conditions:

   1. NOT women of childbearing potential (WOCBPs).
   2. WOCBPs that strictly adopt contraceptive measures during treatment and within at least 6 months after last drug administration.
8. Organs well-functioned according to laboratory examination and imaging;
9. Having good compliance with treatment plans, being capable of understanding the research process, and having signed a written informed consent.

Exclusion Criteria:

1. Bilateral invasive breast cancer or metastatic (Stage IV) breast cancer;
2. With severe cardiovascular conditions:

   1. Myocardial infarction, acute coronary syndrome or PCI/CABG within 6 months;
   2. Current NYHA II-IV congestive heart failure (CHF) or past history of NYHA III-IV CHF.
3. Immunodeficiency, or undergoing systemic steroid therapy or any form of immunosuppressive therapy within 7 days prior to drug administration;
4. Active autoimmune diseases requiring systemic treatment within the past 2 years;
5. Known history of active tuberculosis caused by Bacillus Tuberculosis;
6. History of non infectious pneumonia requiring steroid treatment, or active pneumonia of all types;
7. Severe systemic infections, or other serious illnesses;
8. History of other malignant tumors within the past 5 years, except cured cervical carcinoma in situ and non-melanoma skin cancer;
9. Known history of human immunodeficiency virus (HIV) infection;
10. Active hepatitis B virus (HBV) or hepatitis C virus (HCV) infection;
11. Known allergy or intolerance to therapeutic drugs or their excipients;
12. History of receiving cytotoxic chemotherapy, endocrine therapy, biological therapy or radiation therapy for any reason;
13. History of receiving anti PD-1, anti PD-L1, or anti PD-L2 drugs; or targeted drugs that act on stimulating or co-inhibitory T cell receptors (CTLA-4, OX 40, CD137 etc.);
14. Enrolled in a study of an investigational drug/instrument and given intervention within 4 weeks prior to drug administration for regular drugs/instruments and within 12 months for anticancer or anti-proliferative drugs/instruments;
15. Live vaccine (including but not limited to the following: measles, mumps, rubella, chickenpox/shingles, yellow fever, rabies, BCG, typhoid vaccines, and nasal influenza vaccines such as FluMist®) inoculation within 30 days prior to drug administration;
16. History of mental illness or drug abuse that may affect compliance with trial requirements;
17. During pregnancy or breastfeeding, or WOCABs that refuse to adopt strict contraceptive measures;
18. Deemed to be not appropriate for participating in this study by researchers.