由于TDP-43的丧失,导致异位子内皮发芽和迁移缺陷,通过增加纤维素,vcam1和整体素α4/β1的增加
Katrin Hipke1,2, Bettina Pitter3, Alexander Hruscha1
1German Center for Neurodegenerative Diseases (DZNE), Munich, Germany.
Frontiers in cell and developmental biology
|June 29, 2023
概括
通过影响纤维素1和VCAM1.1,TDP-43的损失导致异常的血管生长. 在斑马鱼中减少这些因素可以挽救这些发育缺陷,揭示了血管生成的新途径.
科学领域:
- 神经科学是一个神经科学.
- 发展生物学 发展生物学
- 细胞生物学 细胞生物学
背景情况:
- 在像ALS和FTD这样的神经退行性疾病中,TDP-43聚合是关键.
- 核TDP-43功能的丧失与疾病病理学有关.
- TDP-43功能障碍会影响细胞核以外的细胞过程.
研究的目的:
- 研究TDP-43在内皮细胞功能和血管生成中的作用.
- 在血管发育过程中识别TDP-43调节的分子通路.
- 为了确定TDP-43在血管生成中的作用是否在物种之间保持.
主要方法:
- 利用TDP-43淘汰赛斑马鱼模型研究发育性血管生成.
- 检查了TDP-43功能丧失的人类静脉内皮细胞 (HUVEC).
- 分析了纤维素1 (FN1),VCAM1和整蛋白α4β1 (ITGA4B1) 的基因表达.
- 通过调节斑马鱼的同类基因来评估血管新生缺陷的救援.
主要成果:
- 斑马鱼的TDP-43功能丧失导致了内皮细胞的增生和定向迁移缺陷.
- 缺少 TDP-43 的 HUVEC 细胞表现出高分支.
- 在缺乏TDP-43的HUVEC细胞中观察到FN1,VCAM1和ITGA4B1的高表达.
- 在斑马鱼中减少同源基因ITGA4,FN1和VCAM1拯救了血管新生缺陷.
结论:
- 在发育过程中,TDP-43在调节血管生成方面发挥着至关重要的作用.
- 一个涉及FN1,VCAM1和ITGA4B1的新途径被确定为受TDP-43.3的调节.
- 在人类和斑马鱼之间,TDP-43在血管生成中的功能得到了保护,这凸显了其基本重要性.
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