Camrelizumab Combined With or Without Apatinib and SOX of Neoadjuvant Treatment for Gastric Cancer

Inclusion criteria

• Has previously untreated localized gastric or GEJ adenocarcinoma as defined by T3-4N+M0 (according to AJCC 8th edition) ;
• Plans to proceed to surgery after completion of neoadjuvant therapy;
• Has an Eastern Cooperative Oncology Group (ECOG) performance status score of 0 to 1.
• Has adequate organ function.
• Female subjects of childbearing potential must have a negative serum pregnancy test within 72 hours prior to the first dose, and be willing to use a highly effective method of contraception during the study and for 2 months after the last dose of carrelizumab or 8 weeks after apatinib or 6 months after chemotherapy drugs, whichever is longer.
• Male subjects whose partners are women of reproductive age should be surgically sterilized or agree to use highly effective methods of contraception during the study and for 2 months after the last administration of carrilizumab or 8 weeks after apatinib or 3 months after chemotherapy drugs, whichever is longer. Sperm donation is not allowed during the study.

Exclusion criteria

• Known HER2 positive;
• Known peritoneal metastasis or positive peritoneal cytology (CY1P0) or T4b (according to AJCC 8th edition);
• Previous or concurrent malignancies, except for cured basal cell carcinoma of skin, carcinoma in situ of cervix, and carcinoma in situ of breast;
• Uncontrolled hypertension ( systolic ≥140 mmHg or diastolic ≥90 mmHg despite antihypertensive therapy)；
• Known hypersensitivity to any of the study drugs or excipients;
• Known hereditary or acquired bleeding and thrombotic tendencies (e.g. hemophiliacs, coagulation disorders, thrombocytopenia, etc.);
• Congenital or acquired immune deficiency (e.g. HIV infected)