文摘
Previous studies reported leukemic cells from acute myeloid leukemia (AML) patients can differentiate into dendritic cells (DCs), which had some immunoregulatory dysfunctions to effectively stimulate autologous CTLs’ anti-leukemia immune response. The zinc-finger protein A20, a negative regulator of the nuclear factor (NF)-魏B pathway, was found to play a crucial role in controlling the maturation and function of human monocyte-derived DCs. However, the effects of A20 in AML derived DCs (AML-DCs) have not yet been evaluated. In this study, A20 expression was up-regulated in AML-DCs activated with tumor necrosis factor (TNF)-伪. Then, A20 attenuation with siRNA in AML-DC enhanced the expression of several co-stimulatory molecules and proinflammatory cytokines. Furthermore, after A20 attenuation in AML-DCs, the autologous cytolytic T cells (CTLs) induced by AML-DCs had higher killing capability and specificity for primary AML cells. Additionally, receptor-interacting protein (RIP) and the NF-魏Bp65 pathway were elevated in AML-DCs when A20 was reduced. Hence, this study identified A20 as a negative regulator for controlling AML-DC maturation and immunostimulatory potency, as A20 down-regulation resulted in AML-DCs with enhanced autologous CTLs immune capacity through the NF-魏B pathway.