MEF2A and adult T-cell leukemia/lymphoma: More recent studies investigated all four MEF-2 isoforms (A-D, reviewed in (Madugula et al., 2022)), of which two (MEF-2A and -2C) were highly overexpressed in a wide array of HTLV-1 infected and ATLL cell lines as well as in acute ATLL patients (Madugula et al., 2022).