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在MDM2-p53轴调节诺林/frizzled4信号和血液-中枢神经系统屏障功能
Jacklyn Levey1,2, Md Abedin1, Chi Zhang3
1Department of Ophthalmology and Visual Neurosciences, University of Minnesota, Minneapolis, MN 55455, USA.
Science signaling
|July 8, 2025
概括
这种p53蛋白质通过抑制内皮细胞中的norrin/frizzled4信号传递,损害了血脑屏障的功能. 准MDM2可能会危及这一障碍,而NCAPH是潜在的FEVR基因.
科学领域:
- 分子生物学分子生物学
- 细胞生物学 细胞生物学
- 神经科学是一个神经科学.
背景情况:
- 诺林/frizzled4信号传输对于血液-中枢神经系统屏障的完整性至关重要.
- 内皮细胞 (ECs) 中p53的增加与糖尿病中中枢神经系统血管漏水相关.
- 对于p53在ECs中的作用及其对屏障功能的调制是不清楚的.
研究的目的:
- 研究p53在内皮细胞血液-中枢神经系统屏障中的作用.
- 确定norrin/frizzled4信号在压力或疾病下是如何调节的.
- 确定p53,MDM2和norrin/frizzled4信号之间的相互作用.
主要方法:
- 转录组分析 转录组分析
- 基于细胞的测定.
- 鼠标遗传模型 (EC 特定的Mdm2剥离)
主要成果:
- 特定于EC的Mdm2除降低了norrin/frizzled4信号传输,EC增殖和视网膜血管生成.
- 在Mdm2被消去的小鼠中,被破坏的血视网膜屏障功能通过Trp53删除被恢复.
- 通过p53介导的EC增殖和norrin/frizzled4信号的抑制与减少的NCAPH表达相关.
结论:
- p53对norrin/frizzled4信号传递和EC增殖产生负面调节,影响血液-中枢神经系统屏障功能.
- MDM2 抑制剂可能会损害血液-中枢神经系统屏障的完整性.
- NCAPH是EC中p53的潜在下游效应因子,也是家族排泄性玻璃色素病变 (FEVR) 的候选基因.
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