CD8A and cancer: The impact of miRNA34a is also studied when transfectedinside cancer cells and along with inactive and active Jurkat T cells.CD8+ T cells express PD-1 receptors, while cancer cells carry PD-L1receptors on their surfaces.26 The combinationof both receptors leads to the weakening of the T cell immune functionsagainst cancer cells, thereby leading to the tumor escape.