Abstract
Abstract The minimal residual disease (MRD) is the origin element that caused the relapse and drug resistance of hematological malignancies, the immune cells play a great role to clear MRD. A variety of immune cells have anti-tumor effects. However, tumor cells antagonize anti-tumor effects by reprogramming of constituents associated with tumor environment. Many different cell types, including immune cells, mesenchymal cells and tumor cells in tumor microenvironment release exosomes. The latest researches indicate that "cargo" and surface ligands carried by exosomes secreted by hematological malignant cells not only can affect the function of natural killer cell (migration, activation, proliferation, secretion and NKG2D expression), macrophage (migration and secretion) and dendritic cell (maturation and presentation), but also regulate the expression of PD-L1 and CCR2, CCL2 secretion and transformation of monocytes. The altered function of immune cells will eventually have effect on the progression of hematological malignancies.
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