SULT1A1 and acute myeloid leukemia: In a repeated cell viability assay, we found that treatment of cells from the SULT1A1-expressing AML cell lines U937, THP-1, and MV4-11 with NSC743380 resulted in in vitro growth inhibition, with IC50 values between 0.1 and 0.8 μM (data not shown).