BRD7 and nasopharyngeal carcinoma: CCK‐8 and colony formation experiments indicated that, in comparison to the control group, BRD7 transcriptional activation mediated by dCas9‐TET1CD‐sgRNA2&sgRNA5 significantly inhibited the proliferation ability and colony formation ability of NPC cells, while restoring BRD7 expression rescued the inhibitory effect of this demethylation system on NPC cell proliferation and colony formation (Figure 7C,D).