グレリンは,ヒト内皮細胞における炎症反応と核因子kappaBの活性化を阻害する
Wei Gen Li1, Dan Gavrila, Xuebo Liu
1Department of Internal Medicine, Cardiovascular Division, University of Iowa College of Medicine, Iowa City, IA 52242, USA.
Circulation
|May 1, 2004
まとめ
ペプチドホルモンであるグリリンは,炎症を誘発するサイトカインの産生と内皮細胞の細胞粘着を抑制することによって,新たな抗炎症効果を示しています. これらの発見は,グリリンがグリリンであることを示唆しています.
科学分野:
- エンドクリノロジー エンドクリノロジー
- 免疫学 免疫学とは
- 血管生物学 血管生物学
背景:
- グレリンは,成長ホルモンを放出するペプチドで,カシェキアと結血性ショックにおける既知の利点があります.
- サイトカインによって引き起こされる炎症は,これらの状態の中心的なものです.
- 成長ホルモンのセレクタゴグ受容体は血管に存在し,血管炎症におけるグレーリンの役割を示唆しています.
研究 の 目的:
- ヒト内皮細胞におけるグレリンの抗炎症的可能性を in vitroで調査する.
- ネズミにおけるエンドトキシン誘発の炎症に対するグリリンの効果を in vivo で評価する.
主な方法:
- 人間の静脈内皮細胞 (HUVEC) は,腫瘍死滅因子アルファ (TNF-alpha) で刺激されました.
- サイトカインの放出,単核細胞の結合,核因子-カッパB (NF-kappaB) の活性化を測定した.
- ネズミは,エンドトキシンとグレリンを静脈内投与した.
主要な成果:
- グレリンは,HUVECsにおける基礎およびTNF-α誘発のサイトカイン放出および単核細胞結合を著しく抑制した.
- グレリンは,ラットにおけるエンドトキシン誘発のサイトカイン生成を抑制した.
- ペプチドは,酸化還元媒介信号伝達を阻害し,NF-kappaBの活性化を阻害した.
- デサチルグリンはこれらの抗炎症効果を欠いており,受容体に依存した作用を示しています.
結論:
- グレリンは,内皮細胞における強力な抗炎症作用を,インビトロとインビボの両方で示しています.
- これらの作用には,サイトカイン生成の抑制,細胞結合,NF-kappaBの活性化が含まれています.
- グレリンは,特にグレリン濃度が低下した状態では,動脈硬化などの炎症性疾患を調節する役割を果たす可能性があります.
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