Fig. 1From: Extracellular vesicle PD-L1 in reshaping tumor immune microenvironment: biological function and potential therapy strategiesRegulation of PD-L1 expression on the surface of tumor cells. Many factors affect the expression of PD-L1 on tumor cell surface, including genomic alterations and epigenetic, transcriptional, post-transcriptional, and post-translational regulatory mechanismsBack to article page