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通过通过SLC25A6调节线粒体功能的XPNPEP2调节血管生成通过SLC25A6调节线粒体功能
Chenxi Yang1,2, Yijun Lu1,3, Yu Xia1
1Department of Nephrology, National Clinical Research Center for Child Health, Children's Hospital, Zhejiang University School of Medicine, Hangzhou, China.
Frontiers in cell and developmental biology
|January 23, 2026
概括
通过调节线粒体活动,X-prolyl aminopeptidase 2 (XPNPEP2) 对内皮细胞功能和血管形成至关重要. 它的缺失会损害血管密度和伤口愈合,为血管生成相关疾病提供新的治疗点.
科学领域:
- 生物化学 生物化学
- 细胞生物学 细胞生物学
- 生理学 生理学 生理学
背景情况:
- X-prolyl aminopeptidase 2 (XPNPEP2) 在血管内皮细胞 (ECs) 中表达,并与心血管疾病和血管生成有关.
- 在EC和血管新生病原体中XPNPEP2的确切作用尚未完全理解.
研究的目的:
- 阐明XPNPEP2在内皮细胞中的功能及其在血管生成中的作用.
- 调查XPNPEP2参与血管生成的潜在机制,特别是与线粒体功能的联系.
主要方法:
- 使用XPNPEP2删除在小鼠中的"体内"研究,以评估病理变化和生理功能.
- 在体外实验中对EC进行实验,以评估增殖,迁移和管体生成.
- 线粒体功能测定,包括ATP生产,线粒体活性氧物种 (mROS) 测量和呼吸链分析.
- 分析XPNPEP2与SLC25A6的相互作用,以及Siah E3泛素蛋白联酶1 (SIAH1) 在调节SLC25A6水平中的作用.
主要成果:
- 在小鼠中XPNPEP2缺失导致肺动脉壁和脏组织病理,静脉血管密度降低,伤口愈合和瘤生长受损.
- 在实验室中,XPNPEP2缺乏导致了EC增殖,迁移和管形成的减少,与线粒体功能障碍有关 (低ATP,高mROS,呼吸中断).
- XPNPEP2与SLC25A6相互作用;XPNPEP2的过度表达恢复了血管生成和SLC25A6水平,而XPNPEP2抑制通过SIAH1-介导的降解降低了SLC25A6. 单独抑制SLC25A6可以减弱EC血管生成.
结论:
- 通过调节线粒体功能,XPNPEP2对于内皮细胞功能和血管生成至关重要.
- 由SIAH1调节的XPNPEP2-SLC25A6轴在血管生成中起着至关重要的作用.
- 向XPNPEP2可能为血管生成相关疾病提供一种新的治疗策略.
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