A Rapid Translational Immune Response Program in CD8 Memory T Lymphocytes.

A Rapid Translational Immune Response Program in CD8 Memory T Lymphocytes.
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DOI:
10.4049/jimmunol.2100537
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发表时间:
2022-09-15
影响因子:
4.4
通讯作者:
Wendel, Hans-Guido
Wendel, Hans-Guido
中科院分区:
医学2区
文献类型:
--
作者:
Salloum, Darin;Singh, Kamini;Davidson, Natalie R.;Cao, Linlin;Kuo, David;Sanghvi, Viraj R.;Jiang, Man;Lafoz, Maria Tello;Viale, Agnes;Ratsch, Gunnar;Wendel, Hans-Guido

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The activation of memory T cells is a very rapid and concerted cellular response that requires coordination between cellular processes in different compartments and on different time scales. Here, we use ribosome profiling and deep RNA sequencing to define the acute mRNA translation changes in CD8 memory T cells following initial activation events. We find that initial translation enables subsequent events of human and mouse T cell activation and expansion. Briefly, early events in the activation of antigen experienced CD8 T cells are insensitive to transcriptional blockade with actinomycin D, and instead depend on the translation of pre-existing mRNAs and blocked by cycloheximide. Ribosome profiling identifies ~92 mRNAs that are recruited into ribosomes following CD8 T cell stimulation. These mRNAs typically have structured GC and pyrimidine-rich 5’UTRs and they encode key regulators of T cell activation and proliferation such as Notch1, Ifngr1, Il2rb, and serine metabolism enzymes Psat1 and Shmt2, and translation factors eEF1a1 and eEF2. The increased production of receptors of IL2 and IFNγ precedes the activation of gene expression and augments cellular signals and T cell activation. Together, we identify an early RNA translation program that acts in a feed-forward manner to enable the rapid and dramatic process of CD8 memory T cell expansion and activation.
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