A Multicenter, Single-Arm, Phase II Exploratory Study of Eribulin in Combination With Anlotinib for HER2-Negative Recurrent/Metastatic Breast Cancer Previously Treated With Antibody-Drug Conjugates（MBC-EA-II-01）
This study is looking at a new combination of two drugs-eribulin and anlotinib-for patients with HER2-negative advanced breast cancer. Participants in this study have already tried other treatments like T-DXd or SG, but their cancer has gotten worse, and there are currently no standard treatment options left for them. Researchers believe that using these two drugs together may work better than using either one alone based on how they target cancer cells. The goal is to offer a new choice and help improve survival for these patients.
• Female patients aged ≥ 18 years with pathologically confirmed metastatic or locally advanced unresectable breast cancer.
• HER2-negative status, defined as immunohistochemistry (IHC) 0 or 1+, or IHC 2+ with negative HER2 gene amplification by fluorescence in situ hybridization (FISH). If multiple specimens have been tested, the most recent test result will be used for determination.
• Prior treatment with anthracycline- or taxane-containing chemotherapy, including in the neoadjuvant or adjuvant setting.
• Intolerance or disease progression following prior treatment with an antibody-drug conjugate (ADC), without the initiation of a new treatment regimen after ADC therapy.
• Received no more than 4 prior lines (including 4 lines) of chemotherapy.
• At least one measurable lesion per RECIST v1.1.
• Eastern Cooperative Oncology Group performance status (ECOG PS) of 0 or 1.
• Life expectancy ≥ 12 weeks.
• Adequate major organ function as defined by the following criteria:
• Hematology: Absolute neutrophil count (ANC) ≥ 1.5 × 10⁹/L, platelet count (PLT) ≥ 75 × 10⁹/L, hemoglobin (Hb) ≥ 85 g/L (without transfusion or blood product support, or use of G-CSF or other hematopoietic growth factors within 14 days prior to screening).
• Biochemistry: Total bilirubin (TBIL) \< 1.5 × upper limit of normal (ULN); alanine aminotransferase (ALT) and aspartate aminotransferase (AST) \< 2.5 × ULN (or \< 5 × ULN in patients with liver metastases); blood urea nitrogen (BUN) and creatinine (Cr) ≤ 1 × ULN, or calculated creatinine clearance ≥ 50 mL/min (using the Cockcroft-Gault formula).
⁃ Women of childbearing potential must have a negative serum or urine pregnancy test within 7 days prior to enrollment and must agree to use adequate contraception during the study period and for 8 weeks after the last dose of study treatment. Women not of childbearing potential (i.e., surgically sterile or postmenopausal for at least 1 year) are eligible without requiring contraception.
⁃ Willing and able to provide written informed consent, with good compliance and willingness to complete scheduled follow-up.