The relative expression level of miR-103a-2-5p was found to be lower in samples from AML patients and AML cell lines (OCI-AML3, MOLM-13, THP-1, OCI-AML2 and MV4-11) in contrast to samples from healthy donors and normal cells (HS-5). The gene discussed is RUNX3; the disease is acute myeloid leukemia.