ABSTRACT
Myeloid-derived suppressor cells (MDSCs) are a group of immature bone marrow cells with an immunosuppressive effect, and they are abundant in tumor patients and can induce tumor cells to escape the killing of immune cells and thus promote the development, progression, and metastasis of tumor. In recent years, its role in hepatocellular carcinoma microenvironment has attracted more and more attention, but the mechanisms of its recruitment and differentiation in hepatocellular carcinoma microenvironment have not been clearly elucidated. This article mainly summarizes the mechanism of action of tumor cells and tumor stromal cells in hepatocellular carcinoma microenvironment (such as hepatic stellate cells, tumor-associated fibroblasts, and tumor-associated endothelial cells) in the recruitment and differentiation of MDSCs, and it is proposed to target MDSCs as an adjuvant therapy to enhance the potential value of immunotherapy for liver cancer.