This gene encodes a member of the TNF-receptor superfamily. The encoded receptor has been shown to have increased expression upon T-cell activation, and it is thought to play a key role in dominant immunological self-tolerance maintained by CD25(+)CD4(+) regulatory T cells. Knockout studies in mice also suggest the role of this receptor is in the regulation of CD3-driven T-cell activation and programmed cell death. Three alternatively spliced transcript variants of this gene encoding distinct isoforms have been reported.,TNFRSF18,AITR,CD357,GITR,GITR-D,Cancer,Signal Transduction,Cell Biology & Developmental Biology,Growth factor,TNF,Immunology & Inflammation,CD markers,Cytokines,TNF,NF-kB Signaling Pathway,Cell Intrinsic Innate Immunity Signaling Pathway,TNFRSF18