Immunotherapy with immune-checkpoint inhibitors (ICIs) has enabled a leap forward in the treatment of various types of cancer within the past decade. However,only 12.46% of patients with cancer are expected to respond to ICIs.Our team have recently developed a multi-specific antibody technology platform for the microenvironment of solid tumors.~In this study, we are going to study the tumor immune microenvironment of breast cancer patients by patient-derived organoids or PDX model，to design multi-specific antibody drugs for different tumor immune microenvironment，to look forward to improve the effectiveness of immunotherapy for breast cancer and solve the problem of drug resistance.
This is a prospective, single-center, non-randomized, non-controlled study