CCK‐8 and colony formation assays revealed that A549‐ITGβ8‐TCM promoted tumor cell proliferation, whereas H1299‐siITGβ8‐TCM and H1993‐siITGβ8‐TCM significantly inhibited tumor cell proliferation (Figure 3B,C; Figure S2A,B, Supporting Information). Here, ITGB8 is linked to neoplasm.