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August 2, 2026Science Immunology

Dynamic expression of IL-21 in effector CD8 T cells helps control chronic infections

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Authors

ZZZixuan ZhaoSun Yat-sen UniversityFHFeng HanLianyungang Oriental HospitalXZXiaohong ZhaoMoffitt Cancer Center

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Implication

Randomized trial demonstrates IL-21's role in regulating effector CD8 T cells, controlling chronic infections, highlighting its therapeutic potential.

Key Points

  • This research aims to investigate the role of IL-21 expression in CD8 T cells during chronic infections.
  • Utilized Il21-reporter and Il21-fate mapping mice to track IL-21 expression in CD8 T cells.
  • Analyzed proliferative and cytotoxic responses of effector CD8 T cells during LCMV infection.
  • Assessed the role of CD8 T cell-derived IL-21 in chronic versus acute infections.
  • IL-21–expressing CD8 T cells showed enhanced proliferation and cytotoxicity, producing higher levels of IFN-γ and GZMB.
  • IL-21 derived from CD8 T cells was crucial for controlling chronic infections, but not acute ones.
  • IL-21 expression was primarily observed in exhausted progenitor T cells during chronic infection.

Cite This Study

Zhao et al. (2026) studied this question.

synapsesocial.com/papers/6a6eeaaf1b0468a7eeab300ahttps://doi.org/10.1126/sciimmunol.aec5171
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