血管床と年齢によってヒトの血管アルファ (((1) - アドレナゲン受容体のサブタイプ特異的調節
X L Rudner1, D E Berkowitz, J V Booth
1Department of Anesthesiology, Duke UniversityMedical Center, Durham, NC 27710, USA. Medical Center, Durham, NC.
Circulation
|December 11, 1999
まとめ
人間の血管のアルファ 1 アドレナゲン受容体 (alpha 1 ARs) は,血管のタイプによって異なっており,年齢とともに増加します,特に乳腺動脈のアルファ 1bおよびアルファ 1aサブタイプです. これらの発見は,心血管疾患に対する新しい治療目標を提供します.
科学分野:
- 心血管生理学 心血管の生理学
- 薬理学 薬理学とは
- 分子生物学は分子生物学である.
背景:
- アルファ{1) - アドレナゲン受容体 (アルファ{1) ARs) は,血圧と血管抵抗の調節に不可欠です.
- 人間の血管系におけるalpha (α) 1a,alpha (α) 1b,alpha (α) 1d) ARサブタイプの特定の役割は完全に理解されていません.
- これらの受容体を理解することは,ストレスと老化に対する心血管の反応を理解するために不可欠です.
研究 の 目的:
- ヒトの様々な血管床におけるα ((1) ARサブタイプの異なる発現を調査する.
- ヒトの血管系におけるα ((1) ARサブタイプの発現に対する老化の影響を決定する.
主な方法:
- mRNAとタンパク質レベルの評価を用いた384人の患者の500の血管の分析.
- 技術には,RNase保護アッセイ,リガンド結合,収縮アッセイが含まれていました.
- レセプター活性を評価するために,機能分析と競争分析を使用した.
主要な成果:
- アルファ ((1a) AR亜型は,mRNAとタンパク質のレベルの両方で動脈に優勢であり,三つの亜型はすべて静脈に存在します.
- 血管アルファ1aARサブタイプの発現は,血管床によって著しく変化し,中央動脈と比較してスプラッチン動脈ではアルファ1a) ARがより高い.
- 乳腺動脈の収縮はα1aとα1bの両方によって媒介され,全体的なα1ARの発現は年齢とともに倍増し,α1bとα1aのサブタイプは顕著に増加します.
結論:
- 人間の血管アルファ (((1) ARサブタイプの分布は,動物モデルと比較してユニークであり,特定の血管によって異なります.
- アルファ (((1) ARサブタイプ,特にアルファ (((1a) とアルファ (((1b) は,乳腺動脈収縮に機能的な役割を果たします.
- 老化により,ヒトの血管系におけるアルファ1ARサブタイプの発現が著しく調節され,潜在的な治療標的となる.
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