BCL6 and diffuse large B-cell lymphoma: It was suggested that proliferation and survival of DLBCL cell lines expressing BCL6 are suppressed by small-molecule and peptide inhibitors of BCL6 (8, 9), but subsequent results have been mixed with some classes of inhibitor potently repressing DLBCL cell lines (37, 41, 42), whereas others show little effect (38, 39, 40).