グルココルチコイドへの生理間暴露によるCD8T細胞免疫の長期プログラム
Jun Young Hong1, Jaechul Lim1, Fernando Carvalho1
1Department of Immunobiology, Yale University School of Medicine, New Haven, CT 06510, USA.
Cell
|March 7, 2020
まとめ
早期のグルココルチコイドへの曝露は免疫系に永久に影響を及ぼします. この生後ストレスが成人期に CD8 T細胞の反応を低下させ,腫瘍と細菌感染のコントロールに影響します.
科学分野:
- 免疫学
- 内分泌学
- 発達生物学
背景:
- 幼児期の環境への曝露は,特に胎児期には,生涯にわたる発達と生理に影響を及ぼします.
- これらの初期の経験は 予想される環境条件に生物をプログラムすることができます
- しかし,不良な胎児の暴露は,成人期に発症する健康障害にも寄与します.
研究 の 目的:
- 生体生理学と免疫機能に対する 生後期のグルココルチコイド被曝の長期的な影響を調査する.
- 発育プログラムにおけるグルココルチコイドの役割と,下垂体 - 垂体 - 副腎 (HPA) 軸への影響を解明する.
- CD8 T細胞の反応と感染と腫瘍の増殖に対する周期のグルココルチコイド被曝の影響を決定する.
主な方法:
- ネズミは産前期にグルココルチコイドにさらされた.
- HPA軸の活動に対する長期的な効果は成人期に評価された.
- CD8 T細胞の機能は,腫瘍の成長と細菌感染モデルで評価されました.
主要な成果:
- HPA軸の持続的な変化をもたらした.
- 成人したマウスは ホルモンの濃度が著しく低下した.
- CD8 T細胞の反応が低下し,腫瘍の成長と細菌感染の制御が低下した.
結論:
- 生後ストレス,特にグルココルチコイドへの曝露は,CD8T細胞免疫に持続的に有害な影響を及ぼします.
- 早期のストレスによるHPA軸の活性の変化は,長期的な免疫機能障害に寄与する.
- これらの発見は,成人における免疫能力と病気の感受性の形成における 生後環境の重要な役割を強調しています.
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