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甲状腺激素T4通过增强血脑屏障的完整性来减轻创伤性脑损伤
Mayuri Khandelwal1, Zhe Ying1, Fernando Gomez-Pinilla1,2
1Department of Integrative Biology and Physiology, University of California Los Angeles, Los Angeles, CA 90095, USA.
International journal of molecular sciences
|October 16, 2025
概括
甲状腺激素 (T4) 治疗可以在创伤性脑损伤 (TBI) 后保护大脑. T4治疗减少了血脑屏障 (BBB) 的损伤,并改善了认知功能,为TBI恢复提供了潜在的治疗策略.
科学领域:
- 神经科学是一个神经科学.
- 内分泌学 在内分泌学.
- 血管生物学 血管生物学
背景情况:
- 创伤性脑损伤 (TBI) 损害了血脑屏障 (BBB) 的完整性,导致神经元损失和认知缺陷.
- 破坏BBB涉及增加透性,胀和炎症,加剧TBI相关的损伤.
研究的目的:
- 研究甲状腺激素 (T4) 在TBI后缓解BBB功能障碍方面的治疗疗效.
- 评估T4对TBI后细胞组件,分子标记物和认知结果的影响.
主要方法:
- 在TBI模型中,在中度流体冲击损伤后,通过腹膜内注射给T4注射.
- 评估BBB完整性标记物,包括细胞周细胞和内皮细胞水平,AQP-4和ZO-1表达,以及MMP-9和TLR-4活性.
- 评估星细胞功能,DHA水平,线粒体生物发生,空间学习和记忆保留.
主要成果:
- T4治疗恢复了细胞周细胞和内皮细胞水平,降低了AQP-4,增加了ZO-1,表明BBB修复.
- T4抵消了TBI引起的MMP-9和TLR-4上调,显著降低了BBB的透性和炎症.
- T4增强了A2星细胞活动,增加了DHA水平,刺激了线粒体生物发生,并在空间学习和记忆任务中提高了认知表现.
结论:
- 甲状腺激素 (T4) 通过保持BBB完整性和减少TBI后的血管泄漏和炎症,显示出显著的神经保护潜力.
- T4治疗为改善认知功能和减轻与创伤性脑损伤相关的长期后果提供了一个有希望的治疗途径.
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