To confirm the results, we used two control cell lines (MOLT4/T-ALL and Jurkat/T-ALL) and two HTLV-1-infected cell lines (HUT102 and MT2), as well as four ATLL cell lines (ED, S1T, Su9T, and ST1), and determined the transcriptional activity of the −729 relative to the −680 of the CADM1 promoter region after transfection of the pGL3B/Mock, pGL3B-729 or pGL3B-680 plasmid. This evidence concerns the gene CADM1 and adult T-cell leukemia/lymphoma.