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首页> 外文期刊>Annual review of cell and developmental biology >Unconventional or Preset alpha beta T Cells: Evolutionarily Conserved Tissue-Resident T Cells Recognizing Nonpeptidic Ligands
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Unconventional or Preset alpha beta T Cells: Evolutionarily Conserved Tissue-Resident T Cells Recognizing Nonpeptidic Ligands

机译:非常规或预设的αβT细胞:进化保护的组织居民T细胞识别非肽肽配体

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摘要

A majority of T cells bearing the alpha beta T cell receptor (TCR) are specific for peptides bound to polymorphic classical major histocompatibility complex (MHC) molecules. Smaller subsets of T cells are reactive toward various non-peptidic ligands associated with nonpolymorphic MHC class-Ib (MHC-Ib) molecules. These cells have been termed unconventional for decades, even though only the composite antigen is different from the one seen by classical T cells. Herein, we discuss the identity of these particular T cells in light of the coevolution of their TCR and MHC-Ib restricting elements. We examine their original thymic development: selection on hematopoietic cells leading to the acquisition of an original differentiation program. Most of these cells acquire memory cell features during thymic maturation and exhibit unique patterns of migration into peripheral nonlymphoid tissues to become tissue resident. Thus, these cells are termed preset T cells, as they also display a variety of effector functions. They may act as microbial or danger sentinels, fight microbes, or regulate tissue homeostasis.
机译:承载αβT细胞受体(TCR)的大部分T细胞是与多晶型经典主要组织相容性复合物(MHC)分子结合的肽。 T细胞的较小子集对与非聚合物MHC类IB(MHC-1B)分子相关的各种非肽配体反应。几十年来,这些细胞已被称为非常规,即使仅复合抗原与经典T细胞所见的不同。在此,我们鉴于其TCR和MHC-IB限制元素的共同求出这些特定T细胞的同一性。我们研究其原始胸腺发展:选择造血细胞,导致收购原始分化计划。这些细胞中的大多数在胸腺成熟过程中获取记忆细胞特征,并表现出独特的迁移到外周非lymphoid组织以成为组织居民。因此,这些细胞被称为预设的T细胞,因为它们还显示出各种效应器功能。它们可以充当微生物或危险的哨兵,对抗微生物或调节组织稳态。

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