アンドロゲン被曝は,血管内皮に対するヒト単細胞の粘着を増加させ,血管細胞粘着分子-1-1の血管内皮細胞発現を増加させます
J A McCrohon1, W Jessup, D J Handelsman
1Heart Research Institute, Departments of Cardiology and Andrology, Royal Prince Alfred Hospital, Sydney, Australia. janem@card.rpa.cs.nsw.gov.au
Circulation
|May 5, 1999
まとめ
ディヒドロテストステロン (DHT) のようなアンドロゲンは,動脈硬化症の重要なステップである内皮細胞に対する単細胞の粘着を増加させます. この効果は血管細胞粘着分子-1 (VCAM-1) によって媒介され,アンドロゲン受容体阻害剤によって阻害されることがあります.
科学分野:
- エンドクリノロジー エンドクリノロジー
- 心血管生物学 心血管生物学
- 免疫学 免疫学とは
背景:
- 男性の性別は冠動脈疾患 (CAD) の既知の危険因子です.
- 内皮細胞に対するモノサイトの粘着は,動脈硬化症の発達において極めて重要です.
- アンドロゲンは,この粘着プロセスを促進する役割を果たす可能性があります.
研究 の 目的:
- ディヒドロテストステロン (DHT) が内皮細胞へのモノサイト粘着に及ぼす影響を調査する.
- DHTが内皮細胞表面粘着分子に与える影響を調べる.
- アンドロゲン受容体阻害がDHT誘発の単細胞結合に影響するかどうかを判断する.
主な方法:
- 人間の静脈内皮細胞 (HUVEC) は,DHTおよび/またはヒドロキシフルタミド (HF) で治療されました.
- 単細胞のHUVECへの粘着は,光顕微鏡で測定した.
- 内皮細胞表面粘着分子表現 (VCAM-1) は,ELISAを用いて定量化されました.
主要な成果:
- DHTは,HUVECに対する単細胞粘着を,投与量に依存した方法で,有意に増加させた.
- DHTは,血管細胞粘着分子-1 (VCAM-1) の内皮細胞での発現を高めました.
- ハイドロキシフルタミド (HF) は,抗VCAM-1抗体と同様に,VCAM-1の結合と発現の両方を阻害しました.
結論:
- アンドロゲンへの曝露は,内皮細胞へのモノサイト粘着を促進します.
- このプロアテロゲン効果は,部分的には,VCAM-1発現の増加によって媒介されます.
- アンドロゲン経路またはVCAM-1をターゲットにすることで,動脈硬化症の治療戦略を提供することができます.
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