2017年12月15日
Mode of Tolerance Induction and Requirement for Aire Are Governed by the Cell Types That Express Self-Antigen and Those That Present Antigen.
Journal of immunology (Baltimore, Md. : 1950)
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- 巻
- 199
- 号
- 12
- 開始ページ
- 3959
- 終了ページ
- 3971
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.4049/jimmunol.1700892
- 出版者・発行元
- AMER ASSOC IMMUNOLOGISTS
Aire controls the fate of autoreactive thymocytes (i.e., clonal deletion or development into regulatory T cells [Tregs]) through transcriptional control of the expression of tissue-restricted self-antigens (TRAs) from medullary thymic epithelial cells (mTECs) and bone marrow (BM)-derived cells. Although TRAs expressed by mTECs and BM-derived cells are suggested to complement each other to generate a full spectrum of TRAs, little is known about the relative contribution of TRAs from each component for establishment of self-tolerance. Furthermore, the precise role of Aire in specific types of Aire-expressing APCs remains elusive. We have approached these issues by generating two different types of transgenic mouse (Tg) model, which express a prefixed model self-antigen driven by the insulin promoter or the Aire promoter. In the insulin-promoter Tg model, mTECs alone were insufficient for clonal deletion, and BM-derived APCs were required for this action by utilizing Ag transferred from mTECs. In contrast, mTECs alone were able to induce Tregs, although at a much lower efficiency in the absence of BM-derived APCs. Importantly, lack of Aire in mTECs, but not in BM-derived APCs, impaired both clonal deletion and production of Tregs. In the Aire-promoter Tg model, both mTECs and BM-derived APCs could independently induce clonal deletion without Aire, and production of Tregs was impaired by the lack of Aire in mTECs, but not in BM-derived APCs. These results suggest that the fate of autoreactive thymocytes together with the requirement for Aire depend on the cell types that express self-antigens and the types of APCs involved in tolerance induction.
- リンク情報
- ID情報
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- DOI : 10.4049/jimmunol.1700892
- ISSN : 0022-1767
- eISSN : 1550-6606
- PubMed ID : 29101311
- Web of Science ID : WOS:000417018100005