一次性肺高血圧は,II型骨形態遺伝タンパク質受容体の肺血管表現の低下と関連しています
Carl Atkinson1, Susan Stewart, Paul D Upton
1Department of Medicine, University of Cambridge School of Clinical Medicine, Addenbrooke's Hospital, Cambridge, UK.
Circulation
|April 10, 2002
まとめ
肺における骨形態遺伝タンパク質II型受容体 (BMPR-II) 発現の低下は,肺高血圧に関連しています. この発見は,BMPR-IIが,この重症疾患の特徴である血管病変に作用することを示唆しています.
科学分野:
- 心血管科学の研究について
- 肺内医学 肺内医学 肺内医学
- 分子生物学は分子生物学である.
背景:
- トランスフォーミング成長因子ベータ (TGF-β) 超家族の一員である骨形態遺伝タンパク質II型受容体 (BMPR-II) の変異は,一次性肺高血圧 (PPH) に関わっている.
- 健康な肺と病気の肺のBMPR-IIの細胞発現部位は,ほとんど特徴づけられていない.
研究 の 目的:
- BMPR-IIの細胞局在を正常な肺と肺高血圧の肺に調査する.
- BMPR-II発現レベルとBMPR2変異の存在と疾患の重症度を相関させるため.
主な方法:
- 免疫ヒストキミストリーは,PPH,二次性肺高血圧の患者および健康なドナーの肺組織におけるBMPR-II発現を検査するために使用されました.
- BMPR-II mRNA.を検出するために,in situ ハイブリダイゼーションが行われました.
- 患者はBMPR2変異のゲノタイプ化を行いました.
主要な成果:
- BMPR-IIの発現は,主に正常な肺の血管内皮で観察されました.
- 肺高血圧では,BMPR-II染色は多様でしたが,内皮細胞とミオフィブロブラスト細胞が含まれていました.
- BMPR-II発現の有意な減少は,PPH患者,特にBMPR2変異を有する患者の周辺肺で観察されました.
結論:
- BMPR-IIの細胞分布は,PPHにおける肺血管病変の発生におけるBMPR-IIの役割を支持する.
- 減少したBMPR-II発現は,重度の肺高血圧で見られる血管破壊に寄与する可能性があります.
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