Overview
This is a multicenter II study to compare KN026 and KN046 versus Oxaliplatin, Capecitabine combined KN026 and KN046 in patients with HER2-positive locally advanced resectable gastric cancer or gastroesophageal junction adenocarcinoma.
Description
KN026 is an anti-HER2 bispecific antibody that can simultaneously bind two non-overlapping epitopes of HER2, resulting in dual HER2 signaling blockade.KN046 is a PD-L1 - CTLA-4 bispecific antibody. The trial consists of two groups. All subjects will be treated with KN026 at 30 mg/kg Q3W in combination with KN046 at 5 mg/kg Q3W in Group 1. If the statistical hypothesis is not met in Group 1, patients will be enrolled in Group 2. Patients in group 2 will receive KN026+KN046+XELOX.
Eligibility
Inclusion Criteria:
- The subject can understand the informed consent, voluntarily participate and sign the informed consent ;
- Subjects are older than or equal to 18 years old and younger than or equal to 75 years old on the day of signing the informed consent；
- Histologically or cytologically confirmed, locally advanced HER2-positive gastric cancer or gastroesophageal junction adenocarcinoma.
- ECOG score 0 or 1;
- Left ventricular ejection fraction (LVEF) ≥ 50% at baseline as determined by either ECHO (preferred) or MUGA;
- Liver function met the following criteria within 7 days prior to initial
- administration
Total bilirubin ≤1.0x ULN (Gilbert's syndrome, or total bilirubin ≤1.5x ULN in liver
metastases); Aminotransferase (ALT/AST) ≤1.5x ULN (liver metastatic subjects ≤3xULN);
-Renal function within 7 days prior to initial administration: serum creatinine ≤1.5x ULN
and serum creatinine clearance ≥60mL/min (according to Cockcroft-Gault Formula
calculation);
- Bone marrow function met the following criteria within 7 days prior to initial
administration: Hemoglobin ≥90 g/L; Neutrophil absolute count ≥1.5 x 109/L; Platelet
count ≥100x 109/L; INR or PT≤1.5x ULN, and aPTT≤ 1.5x ULN;
- Life expectancy >3 months;
- The subjects are able and willing to follow the visits, treatment plans, laboratory
tests, and other study-related procedures specified in the study protocol
Exclusion Criteria:
- Existence of other active malignant tumors within 5 years or at the same time. Plan to
perform or have undergone an organ or bone marrow transplant. Myocardial infarction
and poorly controlled arrhythmias occurred within 6 months prior to the first dose.
- Existence of grade III - IV cardiac disorders defined by the NYHA or echocardiogram
shows: LVEF (left ventricular ejection fraction) < 50%.
- Human immunodeficiency virus (HIV) infection.
- Patients with active tuberculosis.
- Patient with previous or current interstitial pneumonia, pneumoconiosis, radiation
pneumonitis, drug-associated pneumonia, severely impaired lung function, etc.
- Patients who have previously received other antibody/drug treatments for immune
checkpoints, such as PD-1, PD-L1, and CTLA4 treatments.
- Have diseases that may increase the risk of participating in the study and using the
study medications, or other severe, acute, and chronic diseases and therefore are
judged by the investigator to be unsuitable for clinical studies.