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<p>Autoimmune regulator (Aire) orchestrates the presentation of self-antigens to developing thymocytes, playing a key role in central tolerance. However, it remains unclear how Aire deficiency influences immune cell development and function. Recent studies show that Aire-expressing thymic epithelial cells produce type I and III interferons, but how impaired IFN signalling from Aire deficiency contributes to immune dysregulation remains unclear. Single-cell RNA sequencing was used to profile immune cells from Aire-deficient and wild-type mice across thymus, bone marrow, and lymph nodes. In the thymus, thymocytes at late maturation stages, non-conventional T cells, myeloid cells, immature Ccl21+ mTECs and cTECs had reduced expression of type I interferon-stimulated genes in the absence of Aire. In contrast, interferon-stimulated gene expression in bone marrow immune cells appeared independent of Aire. These findings support a role for Aire in thymic interferon production and highlight type I IFNs’ influence on transcriptomes of developing immune cells.</p>

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Aire-dependent interferon signalling shapes thymocyte maturation and central tolerance in mice

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年12月9日

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  • Adrianna Jebrzycka,
  • Lars Breivik,
  • David Dolan,
  • Yael Goldfarb,
  • Jakub Abramson,
  • Anette S. B. Wolff,
  • Eystein S. Husebye,
  • Anagha Joshi,
  • Bergithe E. Oftedal

摘要

Autoimmune regulator (Aire) orchestrates the presentation of self-antigens to developing thymocytes, playing a key role in central tolerance. However, it remains unclear how Aire deficiency influences immune cell development and function. Recent studies show that Aire-expressing thymic epithelial cells produce type I and III interferons, but how impaired IFN signalling from Aire deficiency contributes to immune dysregulation remains unclear. Single-cell RNA sequencing was used to profile immune cells from Aire-deficient and wild-type mice across thymus, bone marrow, and lymph nodes. In the thymus, thymocytes at late maturation stages, non-conventional T cells, myeloid cells, immature Ccl21+ mTECs and cTECs had reduced expression of type I interferon-stimulated genes in the absence of Aire. In contrast, interferon-stimulated gene expression in bone marrow immune cells appeared independent of Aire. These findings support a role for Aire in thymic interferon production and highlight type I IFNs’ influence on transcriptomes of developing immune cells.