Upregulation of CD80 on the γδ T cell surface was observed in 3 of the 4 AML patients (mean; >6-fold increase in CD80 expression upon stimulation with IL-15 DCs as compared to baseline) and CD86 in all 4 patients (mean; 23.18% versus 8.21% baseline). The gene discussed is IL15; the disease is acute myeloid leukemia.