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IFT20 is important for effector function of CD4+ T cell

ABSTRACT: Recent studies have suggested that formation of supramolecular activation cluster (SMAC), a large ‘immunological synapse’ composed of various signaling complexes, enhances CD4+ T cell activation. Critically, although the composition of SMAC is known, the proteins involved in SMAC formation have not been fully investigated. We identified that intraflagellar transport 20 (IFT20) play central roles in the effector functino of CD4+ T cells.

ORGANISM(S): Mus musculus

PROVIDER: GSE179623 | GEO | 2022/07/31

REPOSITORIES: GEO

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T cell receptor-triggered nuclear actin network formation drives CD4 T cell effector functions

Project description:T cell antigen receptor (TCR) signaling triggers selective cytokine expression to drive T cell proliferation and differentiation required for immune defense and surveillance. The nuclear signaling events responsible for specificity in cytokine gene expression upon T cell activation are largely unknown. Here, we uncover formation of a dynamic actin filament network in the nucleus that regulates cytokine expression for effector functions of CD4 T lymphocytes. TCR engagement triggers the rapid and transient formation of a nuclear actin filament network via nuclear Arp2/3 complex, induced by elevated nuclear Ca2+ levels and regulated via N-Wasp and NIK. Specific interference with TCR-induced formation of nuclear actin filaments impairs production of effector cytokines and prevents generation of antigen-specific antibodies, but does not interfere with immune synapse formation and cell proliferation. Ca2+-regulated actin polymerization in the nucleus allows CD4 T cells the rapid conversion of TCR signals into effector functions required for T cell help Identification of nuclear F-actin sensitive genes upon TCR signaling

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Effect of retinoic acid on gene expression in CD4 cells stimulated with anti CD3 and CD28

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