NISCH knockdown attenuates the promotion effects of miR-2355-5p on HNSC cell proliferation. (a) The viability of each group of cells was detected by the CCK-8 assay. (b) EdU staining (red) was performed to check the proliferating cells in each group. Cell nuclei were stained with DAPI (blue). (c) Western blot analysis of the impact of si-NISCH on NISCH, cCyclinD1, and p-RbSer807 expression. Data are presented as the mean ± SD.