内皮細胞S-スルフヒドロームのマッピングは,血管機能におけるインテグリン・スルフヒドレーションの重要な役割を強調する
Sofia-Iris Bibli1,2, Jiong Hu1,2, Mario Looso2,3
1Institute for Vascular Signalling (S-I.B., J.H., J.W., M.K.D., V.R., F.D.L., B.F., S.Z., A.K., A.F.O.J., I.F.), Goethe University, Frankfurt am Main, Germany.
Circulation
|December 14, 2020
まとめ
硫化水素に関連する硫酸塩化合物 (H2Sn) は内皮細胞のタンパク質を変化させ,血管機能に影響を与えます. H2Snの補充は患者の血管反応性を改善し,血管疾患の治療の可能性を示唆しました.
科学分野:
- 生物化学
- 分子生物学
- 血管生物学
背景:
- 血管内皮細胞におけるシスタチオニンγリアゼ (CSE) によるシステイン代謝は,硫化水素関連硫酸化合物 (H2Sn) を生成する.
- H2Snは標的タンパク質のシステインS硫化によって生物学的作用を行います.
- この研究は,ヒト内皮細胞におけるS-硫酸ドロムのマッピングを目的とした.
研究 の 目的:
- 人間の内皮細胞におけるH2Sn (S-スルフヒドローム) が標的となるタンパク質を特定する.
- 内皮細胞の機能,特にフローへの反応におけるS-硫化作用を調査する.
- 血管疾患におけるH2Sn補給の治療の可能性を調査する.
主な方法:
- タンデム質量スペクトロメトリー (LC-MS/MS) を用いた液体クロマトグラフィーは,S-硫化システインを特定するために使用された.
- 健康な対動脈硬化性の人の内皮細胞の比較分析,静的対切断ストレス条件,およびH2Snドナー治療.
- 機能的測定には,マウスとヒトにおける細胞粘着,アラインメント,血圧,およびフロー誘発血管拡張の研究が含まれていた.
主要な成果:
- 内皮細胞のS-スルフヒドロムは1591のタンパク質に3446のシステイン残基を含んでいた.
- インテグリン,特にβ3インテグリンが著しく影響され,S- 硫化がコンファメーションとメカニカル伝導を調節した.
- 動脈硬化における内皮機能障害と相関し,H2Sn補給によって救われました.
結論:
- 血管疾患は,流れ反応に関与する内皮タンパク質のS-硫化が変化することを特徴とする.
- 短期的なH2Snサプリメントは,ヒトの血管反応性を高めました.
- H2Sn経路をターゲットにすることで,血管疾患に対する潜在的な治療戦略を提示します.
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