Competition between T Cells for a Finite Epidermal Niche Promotes Selective Retention of Antigen-specific Memory T Cells in the Epidermis
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- Hirai Toshiro
- BIKEN Innovative Vaccine Research Alliance Laboratories, Institute for Open and Transdisciplinary Research Initiatives/Research Institute for Microbial Diseases, Osaka University Graduate School of Pharmaceutical Sciences, Osaka University
Bibliographic Information
- Other Title
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- 表皮内ニッチをめぐる競合が,抗原特異的T細胞保存の選択圧として働く
- ヒョウヒ ナイ ニッチ オ メグル キョウゴウ ガ,コウゲン トクイテキ Tサイボウ ホゾン ノ センタクアツ ト シテ ハタラク
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Abstract
<p>Tissue-resident memory T cells are a highly abundant, non-blood circulating subset of memory T cells. These appear to be the most protective population of memory T cells at barrier surfaces. Long-term retention and survival of tissue-resident memory CD8+ T cells (Trm) is determined by tissue-derived signals, such as keratinocyte-mediated activation of transforming growth factor β (TGFβ) in the epidermis. We found that T cell clones compete for limited amounts of active TGFβ and pre-existing Trm could be replaced with newly recruited effector T cells in the epidermis. On the other hand, when effector T cells transition into Trm, the presence of cutaneous cognate antigen increases the fitness of individual Trm clones in the epidermal niche. Thus, antigen-specific Trm are more efficiently retained than bystander Trm that have not encountered cognate antigens when they compete with newly recruited effector T cells for limited active TGFβ. Therefore, competition between T cells for active TGFβ represents a selective pressure that promotes the accumulation of antigen-specific Trm cells in the epidermal niche. Furthermore, our model implies that the epidermis offers a finite niche for maintaining Trm. Although the epidermal niche of Trm cannot represent the capacity of T cell-mediated immune memory in our body, these findings might suggest a challenge for the accommodation of memory T cells specific to multiple pathogens throughout a lifetime.</p>
Journal
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- YAKUGAKU ZASSHI
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YAKUGAKU ZASSHI 142 (12), 1327-1332, 2022-12-01
The Pharmaceutical Society of Japan
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Details 詳細情報について
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- CRID
- 1390575751452847872
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- NII Book ID
- AN00284903
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- ISSN
- 13475231
- 00316903
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- NDL BIB ID
- 032567651
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- PubMed
- 36450509
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- Crossref
- PubMed
- KAKEN
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- Abstract License Flag
- Disallowed