WNT7AとPAX6は角膜上皮質のホメオスタシスと病原性を定義する
Hong Ouyang1, Yuanchao Xue2, Ying Lin1
11] State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou 510060, China [2] Department of Ophthalmology, and Biomaterial and Tissue Engineering Center of Institute of Engineering in Medicine, University of California San Diego, La Jolla, California 92093, USA.
Nature
|July 18, 2014
まとめ
研究者らは,角膜幹細胞の維持と失明の予防に不可欠な主要な分子プレーヤーであるWNT7AとPAX6を特定しました. この発見は,角膜細胞を角膜細胞に再プログラムすることによって角膜表面疾患の治療のための新しい戦略を提供します.
科学分野:
- オフタルモロジック (眼科)
- 幹細胞生物学 幹細胞生物学
- 分子生物学は分子生物学である.
背景:
- 角膜上皮細胞 (CEC) は,視力にとって不可欠な透明性を維持します.
- リンパ性幹細胞 (LSCs) は,CECを継続的に更新し,その欠乏は角膜疾患や失明を引き起こす.
- LSCの維持と分化を制御する分子機構は,ほとんど知られていない.
研究 の 目的:
- LSCの維持と角膜上皮質の分化を制御する分子メカニズムを解明する.
- LSCの拡張と角膜の分化のためのインビトロプロトコルの開発.
- 角膜表面疾患の治療標的を特定する.
主な方法:
- LSCの拡張と3D角膜の分化のためのフィーダー細胞のないインビトロプロトコルを確立しました.
- LSCの特異性における転写因子p63とPAX6の役割を調査した.
- PAX6.6による角膜上皮質の分化におけるWNT7Aの機能を分析した.
主要な成果:
- p63とPAX6はともにLSCを指定し,WNT7AはPAX6.6を通して差異化を制御する.
- WNT7AまたはPAX6の喪失は,角膜疾患に関連して,LSCが皮膚のような上皮に微分化することにつながります.
- PAX6を皮膚幹細胞に変換することで,角膜損傷を in vivo で修復する LSC のような細胞が生成されます.
結論:
- WNT7A-PAX6軸は,角膜上皮細胞運命を決定する中心的なものです.
- この軸は,角膜表面疾患の潜在的治療標的を表しています.
- 皮膚幹細胞の再プログラミングは,角膜修復のための有望な戦略を提供します.
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