Abstract:
:Regulatory T cells (T(reg) cells) suppress autoreactive immune responses and limit the efficacy of tumor vaccines; however, it remains a challenge to selectively eliminate or inhibit T(reg) cells. In this study, the zinc-finger A20, a negative regulator of the Toll-like receptor and tumor necrosis factor receptor signaling pathways, was found to play a crucial part in controlling the maturation, cytokine production and immunostimulatory potency of dendritic cells (DCs). A20-silenced DCs showed spontaneous and enhanced expression of costimulatory molecules and proinflammatory cytokines and had different effects on T cell subsets: they inhibited T(reg) cells and hyperactivated tumor-infiltrating cytotoxic T lymphocytes and T helper cells that produced interleukin-6 and tumor necrosis factor-alpha and were refractory to T(reg) cell-mediated suppression. Hence, this study identifies A20 as an antigen presentation attenuator in control of antitumor immune responses during both the priming and the effector phases and provides a strategy to overcome T(reg) cell-mediated suppression in an antigen-specific manner, reducing the need to directly target T(reg) cells.
journal_name
Nat Medjournal_title
Nature medicineauthors
Song XT,Evel-Kabler K,Shen L,Rollins L,Huang XF,Chen SYdoi
10.1038/nm1721subject
Has Abstractpub_date
2008-03-01 00:00:00pages
258-65issue
3eissn
1078-8956issn
1546-170Xpii
nm1721journal_volume
14pub_type
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