II型糖尿病患者における内生性エンドセリンの活性増加
Carmine Cardillo1, Umberto Campia, Melissa B Bryant
1Cardiology Branch, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, Md, USA.
Circulation
|October 3, 2002
まとめ
糖尿病患者の血管では,ET (A) 受容体に対するエンドセリン-1 (ET-1) 活性が増加し,ET-1に対する感受性は低下する. これは,糖尿病における血管合併症に寄与する可能性があります.
科学分野:
- 心血管研究 循環器科の研究
- エンドクリノロジー エンドクリノロジー
- 血管生物学 血管生物学
背景:
- 内皮機能不全は,糖尿病における動脈硬化と関連しています.
- エンドセリン-1 (ET-1) は,滑らかな筋肉細胞のミトゲネシスと白血球の粘着を促進する可能性があります.
- II型糖尿病における内生性ET-1活性の研究は極めて重要です.
研究 の 目的:
- ET-1受容体アンタゴニストを使用したII型糖尿病患者の内生ET-1活性を評価する.
- 糖尿病患者と対照群の間で,ET-1受容体阻害と外因的ET-1に対する前腕血流 (FBF) 反応を比較する.
主な方法:
- 前腕の血流 (FBF) 応答は,ストレンスゲーププレチスモグラフィを使用して測定されました.
- 選択的ET(A) 受容体阻害 (BQ-123) とET-1輸注は静脈内で行われました.
- 15人の糖尿病患者と12人の健康な対照群を比較した.
主要な成果:
- BQ-123は,対照群とは異なり,糖尿病患者において有意な血管拡張を誘発した.
- 外因的なET-1は,対照群と比較して糖尿病患者の鈍化した血管収縮を引き起こした.
- ノルエピネフリン血管収縮剤の反応は,両方のグループで類似していました.
結論:
- ET(A) 受容体に対する内在的なET-1活動は,糖尿病耐性血管で強化されています.
- 糖尿病患者は,外因的なET-1に対する感受性が低下しています.
- これらのET-1経路の異常は,糖尿病の血管合併症に寄与する可能性があります.
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