ディゴキシンとその誘導体は,RORγt活性に対抗することによって,TH17細胞の分化を抑制する
Jun R Huh1, Monica W L Leung, Pengxiang Huang
1Molecular Pathogenesis Program, The Kimmel Center for Biology and Medicine of the Skirball Institute, New York University School of Medicine, New York, New York 10016, USA.
Nature
|March 29, 2011
まとめ
ディゴキシンは,T(H) 17細胞の分化と自己免疫疾患に不可欠なRORγtタンパク質を阻害する. 合成デリバティブは,クローン病やリウマチ性関節炎のような炎症状態を標的とした新しい治療法の開発に希望を示しています.
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.
- 薬理学 薬理学とは
背景:
- T(H) 17細胞は,自己免疫疾患において重要な役割を果たします.
- RORγtはT(H) 17細胞の分化と機能に不可欠である.
- T(H) 17経路は,自己免疫疾患の潜在的な治療標的である.
研究 の 目的:
- RORγtの転写活動を阻害する小分子を特定する.
- 自身免疫疾患モデルにおけるRORγt阻害剤の治療の可能性を評価する.
- RORγtがヒトのT(H) 17細胞機能における役割を調査する.
主な方法:
- 昆虫の細胞ベースのレポーターシステムを用いた化学スクリーニング.
- RORγtの転写活性に対する抑制アッセイ.
- T(H) 17細胞の微分化の評価 in vitroおよびin vivo.
- 自己免疫疾患のマウスモデルにおける治療効果の評価.
主要な成果:
- ディゴキシンは,RORγt.の特定の阻害体として特定されました.
- ディゴキシンにより,マウリンT (H) 17細胞の分化が抑制され,自己免疫疾患の重症度が低下した.
- 非有毒なディゴキシン誘導体は,ヒトT (H) 17細胞におけるIL-17誘導を阻害した.
- RORγtは,ヒトとマウスのエフェクターT細胞におけるIL-17発現に不可欠であると確認された.
結論:
- ディゴキシンおよびその誘導体は,効果的なRORγt阻害剤である.
- RORγtをターゲットにすることは,自己免疫疾患の治療のための有望な戦略を提供します.
- 合成ディゴキシン誘導体は,新しい抗炎症療法のためのテンプレートとして機能することができます.
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