RORγt+ APCは,食事による抗原に対する耐性を指示するために,異なるシス調節要素を必要とします
Jie Zhao1,2,3,4, Jiacheng Hao1,2,3,4, Jincheng Chen1,2,3,4
1Institute for Immunology, Tsinghua University, Beijing, China.
Nature communications
|February 21, 2026
まとめ
新たに特定された規制要素であるOCR369は,抗原呈現細胞 (APC) でのRORγt発現を制御しており,これは経口での耐性にとって極めて重要です. その消去はTregの発達を阻害し,腸の炎症を引き起こし,アレルギーの感受性を高めます.
科学分野:
- 免疫学 免疫学とは
- 分子生物学は分子生物学である.
- 胃腸内科 胃腸内科
背景:
- 口服耐性は腸の免疫に不可欠であり,食事および微生物の抗原に対する炎症を予防します.
- RORγt発現抗原呈現細胞 (APC) は,調節性T細胞 (Tregs) を誘導することにより,経口耐性を促進することが知られている.
研究 の 目的:
- 特にRORγt+ APCにおけるRORγt発現を制御する規制メカニズムを特定する.
- 腸内ホメオスタシスと経口耐性の維持におけるこれらの調節要素の役割を明らかにする.
主な方法:
- Rorc遺伝子のロカス内のシス調節要素 (OCR369) の特定.
- RUNX3とのOCR369の相互作用と,クロマチンのループ形成におけるその役割の分析.
- RORγt+ APCs,ILC3s,Tregs,およびマウスの腸内炎症に対するOCR369デレーションの影響を調査する.
主要な成果:
- OCR369の削除により,マウスのRORγt+ APCsとILC3sが著しく減少した.
- この減少は,食事と微生物の抗原に特異的なRORγt+ Tregsの減少につながった.
- OCR369の消去は,小腸の自発的な炎症を引き起こし,アレルギーの感受性を高めました.
結論:
- OCR369は,他のRORγt+細胞タイプとは異なるRORγt+ APCにおけるRORγt発現の主要な調節体である.
- OCR369によって調節されるRORγt+ APCは,口腔耐性と腸の健康に不可欠である.
- この経路の調節不良は,免疫耐性を低下させ,炎症状態を促進します.
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