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向内皮PERK通过增强DLL4-NOTCH3信号在Pre-B位加速淋巴细胞再生
bioRxiv : the preprint server for biology
|November 24, 2025
概括
准骨髓血管中的ER压力可以改善移植后的免疫细胞再生. 阻断PERK可以增强DLL4-NOTCH3的信号传递,促进免疫恢复和IL7的生产.
科学领域:
- 血液学 血液学 血液学
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
背景情况:
- 血造干细胞 (HSC) 移植后免疫恢复延迟导致结果不佳.
- 为了增强淋巴细胞再生,存在有限的策略.
- 骨髓 (BM) 微环境中的内皮ER压力会影响造血再生.
研究的目的:
- 研究ER应激在BM微环境中的造血再生中的作用.
- 阐明ER压力调节免疫细胞恢复的机制.
- 确定治疗点,以改善移植后的免疫复原.
主要方法:
- 在白血病患者和照射小鼠的BM内皮中研究了ER压力 (PERK激活).
- 在小鼠中利用了内皮Perk的遗传切除.
- 进行单细胞分析以检查细胞-细胞信号通路.
- 评估了HSC和B原体的再生,DLL4和NOTCH3的表达,以及IL7细胞因子的产生.
主要成果:
- 在放射后的BM内皮中,PERK激活是显著的.
- 切除内皮皮的Perk增加了DLL4的表达,促进了HSC和B祖先的再生.
- 内皮DLL4激活NOTCH3在介质瘤细胞上,协调淋巴结合.
- PERK-DLL4-NOTCH3轴调节IL7的产生和淋巴原体扩张.
结论:
- 在再生性血液形成中发现了一种新的ER压力控制的血管-肌信号通路.
- 珀克阻塞增强DLL4-NOTCH3信号和IL7的产生,促进免疫恢复.
- 抑制PERK是一种有前途的治疗策略,可以改善骨髓损伤移植后的免疫复原.
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