Wntシグナリングは,増殖性網膜症の病理的血管成長を媒介する
Jing Chen1, Andreas Stahl, Nathan M Krah
1Department of Ophthalmology, Harvard Medical School/Children's Hospital Boston, Boston MA 02115, USA.
Circulation
|October 5, 2011
まとめ
Wntシグナル伝達とクラウジン5は,網膜病における病理的な網膜新血管化に不可欠である. これらの経路をターゲットにすることで,この盲目の状態に対する新しい治療法を提供することができます.
科学分野:
- オフタルモロジック (眼科)
- 血管生物学 血管生物学
- 分子シグナリング
背景:
- 発血性増殖性網膜症は,異常な網膜新血管化を促すことで失明を引き起こす.
- 正常血管と病理血管の分子の違いを理解することは,標的治療の鍵です.
- Wntのシグナル伝達変異は,網膜血管の欠陥と関連しています.
研究 の 目的:
- 網膜病における病理的な網膜血管成長におけるWnt信号伝達の役割を調査する.
- 血管新生におけるWnt受容体と下流分子の機能を決定する.
- Wnt経路による血管新生におけるクラウジン5の関与を探求する.
主な方法:
- 酸素誘発増殖性網膜症のマウスモデルを使用した.
- 診断されたWnt受容体発現と病理的な新血管化における活性.
- Lrp5とdishevelled2の損失が網膜血管の成長に及ぼす影響を調べました.
- 内皮細胞の芽生えと血管の発達におけるクラウジン5の役割について,in vitroとin vivoで調査した.
主要な成果:
- Wnt受容体 (Frizzled4,Lrp5) とその活動は,病理的な新血管化において上昇した.
- Lrp5の減少と dishevelled2の減少により,病理的な新血管化が減少しました.
- Lrp5欠乏症は網膜の血管新生を阻害し,血網膜障壁の形成を阻害し,クラウディン5.5をダウン調節する.
- クラウジン5の抑制により,Wnt主導の内皮細胞の芽生えと血管の成長が抑制されました.
結論:
- Wntシグナリングは,網膜病変の病理的血管発達において重要な役割を果たします.
- Claudin5は,血管新生を促進する新しい機能を持っています.
- これらの発見は,網膜病変の潜在的な治療標的を強調しています.
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