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Updated: Oct 11, 2025

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Swine unconventional T cells.

Miaomiao Wu1, Qianling Jiang2, Ali Nazmi3

  • 1Animal Nutritional Genome and Germplasm Innovation Research Center, College of Animal Science and Technology, Hunan Agricultural University, Changsha, Hunan 410128, China.

Developmental and Comparative Immunology
|December 5, 2021
PubMed
Summary
This summary is machine-generated.

Pigs possess a complex immune system with abundant unconventional T cells crucial for regulating immune responses. Understanding these cells is key to enhancing swine vaccine effectiveness and advancing comparative immunology.

Keywords:
IELInnate-likeMAITNKTPigγδ T

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Area of Science:

  • Immunology
  • Comparative Immunology
  • Veterinary Science

Background:

  • Pigs are vital livestock, and understanding their immune system is essential for improving swine vaccine efficacy.
  • Pig models offer valuable insights into human immunology due to anatomical and physiological similarities.
  • Current research often focuses on conventional T cells (Tconv), which recognize peptide-MHC complexes.

Purpose of the Study:

  • To review the current understanding of unconventional T cells in pigs.
  • To highlight the critical role of unconventional T cells in the porcine immune system.
  • To compare porcine unconventional T cells with their counterparts in mice and humans.

Main Methods:

  • Literature review of immunological studies on pigs.
  • Characterization of key unconventional T cell subsets in pigs, including NKT, γδ T, MAIT, and IELs.
  • Analysis of T cell receptor (TCR) expression patterns and antigen recognition by unconventional T cells.

Main Results:

  • Unconventional T cells are abundant and play a profound regulatory role in the porcine immune system.
  • These cells recognize non-peptide antigens like lipids and metabolites, often with simplified TCR repertoires.
  • Key subsets include NKT, γδ T, MAIT, IELs, and NKp46 or CD11b expressing cells.

Conclusions:

  • Unconventional T cells are a critical component of the porcine immune system, distinct from Tconvs.
  • Further research into porcine unconventional T cells can improve swine health and vaccine development.
  • Highlighting differences between mouse, human, and pig unconventional T cells advances comparative immunology.