2型サイトカインは腸内感覚ニューロンに作用し,神経ペプチド主導の宿主防御を調節する
Rocky M Barilla1,2, Clara Berard1, Linyu Sun1
1Gene Lay Institute of Immunology and Inflammation, Brigham and Women's Hospital, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA.
まとめ
2型サイトカインは,腸内ニューロンにおけるニューロメディンU (NMU) とカルシトニン遺伝子関連ペプチドβ (CGRPβ) を増強し,ヘルミント感染症に対する宿主防御を強化する. これは腸内における 重要な神経免疫通信を 強調しています
科学分野:
- 神経免疫学
- 胃腸内科
- 感染症
背景:
- 腸内神経系 (ENS) の神経ペプチドは免疫細胞に影響しますが,感染中に炎症が腸内ニューロンにどのように影響するかは不明です.
- ニューロメディンU (NMU) とカルシトニン遺伝子関連ペプチドβ (CGRPβ) を生成する主腸感覚神経細胞 (PSN) は,2型サイトカイン受容体 (IL-4,IL-13) を共発する.
研究 の 目的:
- 2型サイトカインがPSNにおけるNMUとCGRPβ発現をどのように調節するかを調査する.
- ヘルミント感染時のPSN応答と宿主防御におけるIL-13受容体サブユニットアルファ1 (IL-13RA1) の役割を決定する.
主な方法:
- NMUとCGRPβを表現するPSNサブセットの特徴.
- 2型サイトカインが神経ペプチド発現に及ぼす影響に関するインビトロおよびインビボ研究.
- ヘリグモモイドスポリギルスの感染中にPSN特異的なIl13ra1の削除を有するマウスにおける宿主防御と免疫応答の分析.
- NMU23とCGRPβの併用による治療効果の評価
主要な成果:
- 2型サイトカインは,PSNにおけるNMUとCGRPβの発現を有意に増加させた.
- PSN特異的なIl13ra1の消去が消去されたサイトカイン誘発ニューロペプチド発現.
- ヘルミントクリアランスが低下し,筋肉の免疫反応が鈍化した.
- NMU23とCGRPβの併用により,抗ヘルミンスの免疫が回復した.
結論:
- 2型サイトカインは,IL- 13RA1経由で腸内感覚ニューロンのNMUおよびCGRPβ発現を直接強化する.
- NMUとCGRPβが関与する双方向神経免疫クロストークは,腸の2型炎症と宿主に対する防御を調節するために不可欠です.
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