在急性肺损伤中,来自大脑的神经营养因子和其衍生的二二类作为Toll-like受体4对手起作用
Weiwei Zhu1,2,3, Leiming Jin2, Qianhui Zhang2
1Department of Cardiology and Medical Research Center, the First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China.
Nature communications
|February 14, 2026
概括
大脑衍生神经营养因子 (BDNF) 水平在急性肺损伤期间降低,导致炎症. 恢复BDNF,或使用其片段BDP-12,通过向巨细胞Toll-like受体4 (TLR4) 来减少炎症.
科学领域:
- 免疫学 免疫学 免疫学
- 神经科学是一个神经科学.
- 肺部病理学 肺部病理学
背景情况:
- 神经营养因子 (NTF) 家族的作用超出了神经系统疾病的范围.
- 在急性炎症性肺部疾病中,NTFs的参与尚未得到充分理解.
- 脑衍生神经营养因子 (BDNF) 是一个关键的NTF,在肺炎中功能不清楚.
研究的目的:
- 研究BDNF在急性炎症性肺病中的作用.
- 确定BDNF影响肺炎的机制.
- 探索BDNF或其片段的治疗潜力.
主要方法:
- 利用已建立的小鼠急性肺损伤 (ALI) 和败血症模型.
- 评估了肺上皮细胞中的BDNF水平,并将其与炎症相关联.
- 研究调节BDNF水平对肺损伤的影响.
- 在体内和体外实验中使用被删除巨细胞的小鼠和细胞培养物进行实验.
- 采用蛋白质组学来识别巨细胞中BDNF的分子标.
- 测试了一种合成BDNF衍生的 (BDP-12) 的治疗效果.
主要成果:
- 在ALI和败血症期间,肺上皮细胞的BDNF水平受损,与炎症负相关.
- 增加的BDNF水平改善了炎症性肺损伤,这种影响取决于巨细胞.
- 通过对抗Toll类受体4 (TLR4) 的作用,BDNF直接抑制了巨细胞炎症.
- 一个特定的BDNF片段 (aa 104-115) 对于TLR4结合至关重要.
- 合成BDP-12在体外和体外表现出TLR4抗原和抗炎作用,但没有引起增殖.
结论:
- 皮质衍生的BDNF通过抑制巨细胞激活,在急性肺炎中起着保护作用.
- BDNF通过直接结合和对抗TLR4对巨细胞的作用来发挥其抗炎作用.
- 合成BDP-12代表了急性炎症性肺部疾病的有前途的治疗候选者.
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