BCL6 and diffuse large B-cell lymphoma: To evaluate DZ-865B's <i>in vitro</i> efficacy, multiple assays were performed, including protein immunoblotting, immunofluorescence, reverse transcription quantitative PCR, EDU proliferation, and soft agar cloning assays.<h4>Results</h4>TCGA analysis revealed significant overexpression of BCL6 in DLBCL (<i>p</i> < 0.05), corroborated by immunohistological staining and western blotting.