内皮TRIM47通过小鼠的KEAP1/NRF2信号通路调节血脑屏障的完整性和认知
Valentin Delobel1, Camille Grenier1, Romain Boulestreau1
1Univ. Bordeaux, INSERM, Biologie des maladies cardiovasculaires, U1034, F-33600, Pessac, France.
Communications biology
|February 10, 2026
概括
大脑小血管疾病 (cSVD) 与TRIM47.7有关. 准TRIM47/NRF2通路可能会预防由cSVD引起的认知衰退和痴呆症.
科学领域:
- 神经科学是一个神经科学.
- 遗传学 是一个遗传学.
- 血管生物学 血管生物学
背景情况:
- 大脑小血管疾病 (cSVD) 是中风,认知衰退和痴呆的主要原因.
- 遗传研究表明chr17q25变体和TRIM47在cSVD病理生理学中存在.
- TRIM47是一种E3泛素酶,在大脑内皮细胞 (ECs) 中丰富.
研究的目的:
- 为了阐明cSVD中TRIM47的生物机制.
- 为了研究内皮TRIM47在维持大脑平衡中的作用.
- 探索针对cSVD的TRIM47/NRF2途径的治疗潜力.
主要方法:
- 生成并分析了Trim47缺乏的小鼠和可诱导的EC特定淘汰模式.
- 进行了体外和体内实验,以评估TRIM47的功能.
- 利用人类蛋白质组数据和NRF2通路激活剂进行治疗验证.
主要成果:
- 在小鼠中,Trim47缺乏导致认知障碍,增加血脑屏障 (BBB) 透性和星病.
- 内皮TRIM47对于维持BBB完整性和大脑平衡至关重要.
- 通过抑制KEAP1,TRIM47稳定了NRF2,从而提高了ECs中的氧化应激弹性.
- 在Trim47-突变小鼠中,NRF2激活改善了BBB功能障碍和认知缺陷.
结论:
- TRIM47/NRF2通路是大脑内皮细胞功能和弹性的关键调节者.
- 这种途径的调节可以作为cSVD易感性的预测生物标志物.
- 准TRIM47/NRF2通路为血管认知障碍和痴呆症提供了一个有前途的治疗策略.
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