细胞外CIRP通过TLR4/miR-155/MafB轴调节缺血性中风中的微质细胞衰变
Dmitriy Lapin1, Dilara Aylar1, Archna Sharma1
1The Feinstein Institutes for Medical Research.
Research square
|August 6, 2025
概括
细胞外冷诱导性RNA结合蛋白 (eCIRP) 通过激活TLR4/miR-155/MafB通路,在缺血性中风中损害微质细胞结合. 准eCIRP可能会增强中风恢复和神经保护.
科学领域:
- 神经科学是一个神经科学.
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
背景情况:
- 缺血性中风是全球死亡和残疾的主要原因.
- 微质细胞分裂对于解决中风后的神经炎症至关重要.
- 细胞外冷诱导性RNA结合蛋白 (eCIRP) 在与中风相关的微质细胞分裂中的作用尚不清楚.
研究的目的:
- 为了研究eCIRP在缺血性中风后的微质细胞分裂中的作用.
- 阐明eCIRP影响微质功能的分子机制.
- 评估针对eCIRP途径的治疗潜力.
主要方法:
- 过渡性中脑动脉阻塞 (tMCAO) 缺血性中风的小鼠模型.
- 分析了eCIRP水平,微细胞受体MerTK和microRNA-155 (miR-155) 的表达.
- 使用初级微质细胞和海马内注射的体外研究.
- 使用酸C23.3抑制eCIRP-TLR4相互作用的药理学抑制.
主要成果:
- 在tMCAO小鼠的大脑中,eCIRP水平增加,而MerTK表达减少.
- CIRP 缺乏改善了神经系统的结果,并增强了微质细胞增生.
- 通过TLR4,eCIRP诱导miR-155,抑制转录因子MafB,降低MerTK的调节,并损害血细胞形成.
- C23治疗恢复了MerTK表达,挽救了血细胞分裂,并改善了中风的结果.
结论:
- 在缺血性中风中,eCIRP通过TLR4/miR-155/MafB信号轴损害了微质细胞.
- 这项研究确定了中风中微质功能障碍的新型机制.
- 准eCIRP是一个有前途的治疗策略,可以促进中风后的功能恢复.
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