CD47 promotes peripheral T cell survival by preventing dendritic cell-mediated T cell necroptosis.

ABSTRACT: Conventional dendritic cells (cDCs) are required for peripheral T cell homeostasis in lymphoid organs, but the molecular mechanism underlying this requirement has remained unclear. We here show that T cell-specific CD47-deficient (Cd47^ΔT) mice have a markedly reduced number of T cells in peripheral tissues. Direct interaction of CD47-deficient T cells with cDCs resulted in activation of the latter cells, which in turn induced necroptosis of the former cells. The deficiency and cell death of T cells in Cd47^ΔT mice required expression of its receptor signal regulatory protein α on cDCs. The development of CD4⁺ T helper cell-dependent contact hypersensitivity and inhibition of tumor growth by cytotoxic CD8⁺ T cells were both markedl

SUBMITTER: Komori S 

PROVIDER: S-EPMC10440595 | biostudies-literature | 2023 Aug

REPOSITORIES: biostudies-literature