Cell Reports (Mar 2023)

The proteome and transcriptome of stress granules and P bodies during human T lymphocyte activation

  • Nicolas Curdy,
  • Olivia Lanvin,
  • Juan-Pablo Cerapio,
  • Fréderic Pont,
  • Marie Tosolini,
  • Emeline Sarot,
  • Carine Valle,
  • Nathalie Saint-Laurent,
  • Emeline Lhuillier,
  • Camille Laurent,
  • Jean-Jacques Fournié,
  • Don-Marc Franchini

Journal volume & issue
Vol. 42, no. 3
p. 112211

Abstract

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Summary: Stress granules (SGs) and processing bodies (PBs) are membraneless cytoplasmic assemblies regulating mRNAs under environmental stress such as viral infections, neurological disorders, or cancer. Upon antigen stimulation, T lymphocytes mediate their immune functions under regulatory mechanisms involving SGs and PBs. However, the impact of T cell activation on such complexes in terms of formation, constitution, and relationship remains unknown. Here, by combining proteomic, transcriptomic, and immunofluorescence approaches, we simultaneously characterized the SGs and PBs from primary human T lymphocytes pre and post stimulation. The identification of the proteomes and transcriptomes of SGs and PBs indicate an unanticipated molecular and functional complementarity. Notwithstanding, these granules keep distinct spatial organizations and abilities to interact with mRNAs. This comprehensive characterization of the RNP granule proteomic and transcriptomic landscapes provides a unique resource for future investigations on SGs and PBs in T lymphocytes.

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