A Phase II Single-arm Clinical Trial of Inetetamab Combined With Pyrotinib Plus Oral Vinorelbine for the Treatment of Patients With HER2-positive Metastatic Breast Cancer
In this phase 2 single-arm clinical trial, 30 patients with HER2-positive metastatic breast cancer after progression on trastuzumab are enrolled and receive treatment of Inetetamab plus Pyrotinib plus Oral Vinorelbine. The study aimed to access the efficacy and safety of Inetetamab combined with Pyrotinib and Oral Vinorelbine in HER2-positive metastatic breast cancer patients after progression on trastuzumab.
• Female, Aged ≥ 18 years.
• Metastatic breast cancer confirmed by pathology or imaging.
• Pathological diagnosis of HER2 positive (definition: immunohistochemical (IHC) 3+, or IHC 2+ with in situ hybridization (ISH) testing of amplification.
• Previously received trastuzumab treatment.
• At least one Measurable target lesion according to RECIST 1.1.
• Eastern Cooperative Oncology Group (ECOG) score 0- 2.
• Sufficient organ function: Neutrophil count (ANC) ≥ 1.5 × 10 \^ 9 / L, Platelet count (PLT) ≥ 100 × 10 \^ 9 / L, hemoglobin (Hb) ≥90 g/L，total bilirubin (TBIL) ≤ 1.5 × upper limit of normal value (ULN), alanine aminotransferase (ALT / AST) ≤ 2.5 × ULN (liver metastasis patients ≤ 5×ULN), serum creatinine ≤ 1.5 × ULN or creatinine clearance rate (CCR) ≥ 60 ml/min, Left ventricular ejection fraction (LVEF) ≥50%.