シルカディアンクロック遺伝子Per2の変異は,血管内皮の機能を変化させます
Hema Viswambharan1, João M Carvas, Vladan Antic
1Department of Medicine, Division of Physiology, University of Fribourg, Rue du Musée 5, CH-1700 Fribourg, Switzerland.
Circulation
|April 4, 2007
まとめ
昼間の時計の遺伝子であるPeriod2 (Per2) は,正常な内皮機能の維持に不可欠である. Per2変異は血管のリラックスを妨げ,心血管の健康に影響します.
科学分野:
- 心血管生物学 心血管生物学
- クロノバイオロジーはクロノバイオロジーを用います.
- 内皮機能の機能について
背景:
- 昼間の時計は,心血管機能と代謝を含む重要な生理学的プロセスを調節する.
- Period2 (Per2) 遺伝子は,日中時計機構の重要な構成要素である.
研究 の 目的:
- 内皮機能の調節におけるPer2遺伝子の役割を調査する.
- マウスモデルにおけるPer2媒介の内皮組織調節の基礎となるメカニズムを解明する.
主な方法:
- Per2変異のマウスモデルを使用して,内皮に依存したリラックスを評価しました.
- アセチルコリンとATPに対する大動脈環の反応を測定するために,臓器室技術を用いた.
- 主要な内皮および炎症マーカーのタンパク質発現レベルを分析した.
主要な成果:
- パー2変異のマウスは,アセチルコリンとATPに対する内皮に依存したリラクゼーションの障害を示した.
- ミュータントの内皮機能不全は,インドメタシンによって部分的に改善され,サイクロオキシゲネーゼの関与を示唆しました.
- シクロオキシゲネーゼ-1 (COX-1) タンパク質濃度の上昇は,Per2変異性大動脈で観察され,血管収縮と相関していました.
結論:
- Per2遺伝子の変異は,大動脈内皮機能不全を引き起こす.
- この機能障害は,COX-1由来血管収縮剤の増加とともに,酸化窒素 (NO) と血管拡張性プロスタグランディン生成の減少を含む.
- Per2遺伝子は,正常な心血管機能の維持に重要な役割を果たしています.
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