CD276 and nasopharyngeal carcinoma: CCK‐8 assay results (Figure 1C,D) showed that inhibition of B7‐H3 gene expression significantly reduced the proliferative ability of NPC cells, and reduced NPC cell colony numbers after sh‐B7‐H3‐RNA transfection proved that B7‐H3 reduced the proliferation of NPC cells (Figure 1E).