空间时空的H2O2闪协调了actin细胞骨重塑,并调节了细胞迁移和伤口愈合
Maurice O'Mara1, Suisheng Zhang1, Ulla G Knaus2
1Conway Institute, School of Medicine, University College Dublin, Dublin, Ireland.
Nature communications
|July 27, 2025
概括
DUOX2是一种NADPH氧化酶,在囊泡中产生过氧化 (H2O2),通过促进细胞迁移和伤口关闭来驱动上皮质修复. 这一发现澄清了阻碍功能和愈合过程中的氧化还原信号.
科学领域:
- 细胞生物学 细胞生物学
- 生物化学 生物化学
- 身体生理学 身体生理学
背景情况:
- 表皮屏障的修复对于预防感染和炎症至关重要.
- 红氧信号传递,涉及囊二醇和氨酸氧化,影响细胞迁移和伤口愈合.
- 在表皮动力学中局部氧化还原信号的精确机制尚不清楚.
研究的目的:
- 在上皮细胞修复中确定过氧化 (H2O2) 的来源和定位.
- 阐明DUOX2在细胞骨重组和细胞迁移中的作用.
- 定义调节上皮质伤口关闭的信号通路.
主要方法:
- 使用可追溯光DUOX2和一个膜结合的H2O2传感器 (HyPer7-MEM).
- 调查了DUOX2囊泡贩运和H2O2生成在actin重塑的网站.
- 在上皮细胞中使用DUOX2的稳定表达和基因切除.
- 分析了涉及PIEZO1,DUOX2和FER氨酸激酶的信号轴.
主要成果:
- 确定DUOX2作为囊泡内含的H2O2来源在细胞骨重组的地点.
- 已证明DUOX2有助于道化纳米管和状体的形成.
- 确认DUOX2生成的H2O2催化了细胞-细胞连接,运动和定向迁移.
- 发现了一个PIEZO1-DUOX2-FER信号轴,启动了用于伤口关闭的收缩波.
结论:
- DUOX2是通过局部H2O2生产来修复表皮屏障的关键调节者.
- 通过DUOX2介导的信号传递对于细胞迁移,伤口愈合和维持屏障完整性至关重要.
- 鉴定的信号通路为表皮动力学中的机械传导和氧化还原调节提供了洞察力.
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