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Updated: Aug 7, 2026

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Adenoviral Transduction of Naive CD4 T Cells to Study Treg Differentiation
Published on: August 13, 2013
経口許容性における抗原反応性T細胞の周辺的デレーション
1Center for Neurologic Diseases, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts 02115, USA.
Nature
|July 13, 1995
まとめ
抗原の経口投与は,抗原反応性T細胞を削除することによって,免疫耐性を誘発する. このプロセスは,抗原の量に依存し,アポトーシスとサイトカインの生成を含み,経口の耐性メカニズムに関する新しい洞察を提供します.
科学分野:
- 免疫学 免疫学とは
- 経口耐性インダクション
- T細胞の規制について
背景:
- 抗原の経口投与は,抗原特異的外周免疫耐性を誘発する重要な方法である.
- 口服による耐性は,全身免疫反応を予防し,自己抗原を標的として,自己免疫疾患を抑制することができる.
- 経口耐性のメカニズムには,抗原用量に影響される活性抑制とクローンアナージーが含まれます.
研究 の 目的:
- 口腔抗原が免疫耐性を誘発するメカニズムを調査する.
- 経口抗原投与後のペイヤー・パッチにおけるT細胞消去の役割を決定する.
- T細胞の反応とサイトカインの産生に対する経口抗原の用量依存的効果を解明する.
主な方法:
- オバルブミン特異のT細胞受容体遺伝子を持つトランスジェニックマウスを利用した.
- 耐性を誘発するためにオバルブミンを経口投与する.
- ペイヤーのパッチでT細胞の消去,アポトーシス,およびサイトカインプロファイル (TGF-β,IL-4,IL-10) を分析した.
- 投与量による影響を評価するために,抗原の投与量と餌の頻度を変化させる.
主要な成果:
- 口服による抗原投与は,ペイヤー・パッチにおける抗原反応性T細胞のアポトーシス媒介の切除につながった.
- 削除は,抗原の投与量と餌の頻度に依存していました.
- 抗原の低用量は,TGF-β,IL-4,およびIL-10を産生する抗原特異細胞を誘導し,有意なデレーションは起こさなかった.
- より高い用量では,Th1細胞とTh2細胞の両方が削除され,TGF-βを分泌する細胞が抵抗性を示した.
結論:
- 経口投与された抗原は,抗原反応性Th1およびTh2細胞のエクストラティミック・デリションを通じて免疫耐性を誘発する.
- この消去メカニズムは,以前に知られている活性抑制とクローンアナージー経路を補完しています.
- 経口抗原投与の投与量と頻度は,耐性誘導経路に重大な影響を及ぼし,T細胞の運命とサイトカインプロフィールに影響を与えます.
関連する概念動画
Cell-mediated Immune Responses
Overview
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The adaptive immune system, a crucial component of the overall immune response, offers a highly specialized defense against pathogens. It involves specific cell types and features, enabling it to combat infections effectively and efficiently.
The primary cell types involved in adaptive immunity are T cells and B cells. Each type has a unique role in defending the body against pathogens. T cells are responsible for cell-mediated immunity. They identify and eliminate infected cells directly,...
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Antigens Involved in Adaptive Immunity
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Complete Antigens
Complete antigens possess both immunogenicity and reactivity.
Complete Antigens
Complete antigens possess both immunogenicity and reactivity.
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