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July 30, 2026The Journal of Immunology

Discovery of Exhausted-like Lung Tissue-Resident Memory T Cells as Key Mediators of Protective Immunity 2257944

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Authors

CLChaofan LiACArka Sen ChaudhuriJSJie Sun

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Overview

Randomized trial identifies exhausted-like T cells as key for protective immunity in respiratory infections, suggesting new vaccine strategies.

Key Points

  • This research aims to uncover the mechanisms behind protective immunity provided by a novel population of lung-resident memory T cells.
  • Analyzed antigen-specific lung TRMs from humans and mice.
  • Identified PD-1HI CD103LO exhausted-like TRMs (TRM-ELs) and compared them with PD-1LO CD103HI conventional TRMs.
  • Investigated the role of local TCR signaling in the maintenance and function of TRM-ELs.
  • Lung TRM-ELs display distinct transcriptional and signaling characteristics compared to conventional TRM-Cons.
  • TRM-ELs are critical for heterologous protection against secondary infections, unlike TRM-Cons.
  • Enhanced degranulation molecules in TRM-ELs are vital for rapid immune responses, contrasting with impaired degranulation seen in TRM-Cons.

Cite This Study

Li et al. (2026) studied this question.

synapsesocial.com/papers/6a6af59760e2b924d3ea22e4https://doi.org/10.1093/jimmun/vkag141.514
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