Eribulin Combined With Sintilimab as First-line Treatment for Unresectable Locally Advanced or Metastatic HER2-negative Breast Cancer:A Multicenter, Single-arm,Phase II Clinical Trial

Exclusion Criteria

• •1.In the metastatic stage, previous use of Eribulin or immunotherapy or other drug chemotherapy. 2.Patients enrolled in any interventional clinical trial at the same time and received the investigational therapy ≤ four weeks prior to initiation of the regimen or at least five half-lives of the investigational drug. 3.Patients who had received radiation therapy with bone marrow coverage \>20% within two weeks before the start of treatment, except for minor palliative radiation therapy more than one week before the first day of the study. 4.Patients with a visceral crisis, and requiring chemotherapy. 5.Patients allergic to Eribulin or Sintilimab. 6.
• •Patients received blood transfusions ( platelets or red blood cells ) within 4 weeks before the initiation of treatment. 7.Patients received colony stimulating factors ( such as granulocyte colony stimulating factor \[ g-CSF \], granulocyte macrophage colony stimulating factor or recombinant erythropoietin ) within 4 weeks before the start of treatment. 8.A history of platelet transfusion for chemotherapy-induced thrombocytopenia or prior cancer treatment (lasting \> 4 weeks and associated with recent treatment) is known to result in ≥ grade 3 hematological toxicity. 9.The patient had any known history of myelodysplastic syndrome (MDS) or acute myeloid leukemia (AML). 10.Patients have a severe, uncontrolled medical condition, a non-malignant systemic disease, or an active, uncontrolled infection. 11.Patients diagnosed, detected, or treated for another type of cancer within ≤2 years prior to beginning regimen therapy. 12.Patients with brain metastases or pial metastases uncontrolled. 13.Patients have received an allogeneic bone marrow transplant or double umbilical cord blood transplant. 14.Patients cannot swallow oral medications. 15.Patients with gastrointestinal disorders that may interfere with the absorption of investigational drugs. 16.Patients have had systemic active autoimmune disease (i.e., disease modulators, corticosteroids, or immunosuppressants) within the past two years.
• •17.Patients with a history of human immunodeficiency virus, active-hepatitis -B or C.
• •18.Pregnant or nursing women. Fertile adults without effective contraceptive methods.