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Robust T cell activation requires an eIF3-driven burst in T cell receptor translation.

ABSTRACT: Activation of T cells requires a rapid surge in cellular protein synthesis. However, the role of translation initiation in the early induction of specific genes remains unclear. Here, we show human translation initiation factor eIF3 interacts with select immune system related mRNAs including those encoding the T cell receptor (TCR) subunits TCRA and TCRB. Binding of eIF3 to the TCRA and TCRB mRNA 3'-untranslated regions (3'-UTRs) depends on CD28 coreceptor signaling and regulates a burst in TCR translation required for robust T cell activation. Use of the TCRA or TCRB 3'-UTRs to control expression of an anti-CD19 chimeric antigen receptor (CAR) improves the ability of CAR-T cells to kill tumor cells in vitro. These results identify a new mechanism of eIF3-mediated translation control that can aid T cell engineering for immunotherapy applications.

SUBMITTER: De Silva D

PROVIDER: S-EPMC8758144 | biostudies-literature | 2021 Dec

REPOSITORIES: biostudies-literature

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Robust T cell activation requires an eIF3-driven burst in T cell receptor translation.

De Silva Dasmanthie D Ferguson Lucas L Chin Grant H GH Smith Benjamin E BE Apathy Ryan A RA Roth Theodore L TL Blaeschke Franziska F Kudla Marek M Marson Alexander A Ingolia Nicholas T NT Cate Jamie Hd JH

eLife 20211231

Activation of T cells requires a rapid surge in cellular protein synthesis. However, the role of translation initiation in the early induction of specific genes remains unclear. Here, we show human translation initiation factor eIF3 interacts with select immune system related mRNAs including those encoding the T cell receptor (TCR) subunits TCRA and TCRB. Binding of eIF3 to the <i>TCRA</i> and <i>TCRB</i> mRNA 3'-untranslated regions (3'-UTRs) depends on CD28 coreceptor signaling and regulates a ...[more]

PMID: 34970966

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