UTX/Top2β轴介导的脊髓微血管内皮细胞衰老加剧脊髓损伤
Dongliang Liu1, Yudong Liu2, Tianding Wu3
1Department of Emergency, Xiangya Hospital, Central South University, Changsha, Hunan, China.
PloS one
|December 12, 2025
概括
删除UTX可以减少血管衰老,并通过增加Top2β增加脊髓损伤 (SCI) 后的增殖. 这种UTX/Top2β通路是SCI后血管修复的关键.
科学领域:
- 血管生物学 血管生物学
- 再生医学是一种再生医学.
- 细胞衰老 细胞衰老
背景情况:
- 细胞衰老对于血管生成至关重要.
- 在脊髓损伤 (SCI) 后,UTX在血管再生中的作用尚未完全被理解.
- 这项研究探讨了老化如何调解SCI后的UTX调节的血管反应.
研究的目的:
- 在SCI后细胞衰老的背景下研究UTX调节的血管反应的机制.
- 为了确定UTX标基因参与血管修复后SCI.
主要方法:
- 在SCI后的脊髓内皮细胞中评估了p16INK4a和UTX表达.
- 产生的内皮特异性UTX淘汰小鼠.
- 在初级脊髓微血管内皮细胞 (SCMVECs) 中评估老化和增殖.
- 利用RNA测序和ChIP-seq来识别UTX目标基因.
主要成果:
- 在SCI后,UTX和p16INK4a表达增加.
- UTX删除降低了内皮衰老,并增加了体内和体外的增殖.
- Top2β被确定为直接的UTX转录标,受到UTX的负调节.
- 托普2β倒置逆转了UTX缺失对衰老和增殖的影响.
结论:
- UTX缺失减弱了血管内皮衰老,并通过Top2β上调调节促进SCI后的血管生成.
- UTX/Top2β轴调节了SCI后的血管再生.
- 这一途径代表了SCI血管修复的潜在治疗标.
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