对BAL细胞外囊泡的分析揭示了NF-kB在慢性肺异位移植功能障碍开始时的激活
Alessandra Maria Storaci1,2, Maria Rosaria de Filippo3, Sara Franzi4
1Department of Pathophysiology and Transplantation, University of Milan, Milan, Italy.
Clinical science (London, England : 1979)
|January 6, 2026
概括
支气管洗液中的细胞外囊泡 (EVs) 在肺移植 (LT) 后发出早期慢性肺全移植功能障碍 (CLAD) 的信号. 通过CLAD-EVs激活NF-kB通路促进炎症,可能是治疗点.
科学领域:
- 肺部医学 肺部医学
- 移植免疫学 移植免疫学
- 分子生物学分子生物学
背景情况:
- 慢性肺异位移植功能障碍 (CLAD) 是肺移植 (LT) 长期成功的主要障碍.
- 早期检测CLAD发病前的分子信号对于及时干预至关重要.
研究的目的:
- 通过分析支气管支气管洗 (BAL) 衍生的细胞外囊泡 (EVs) 来识别CLAD的早期分子指标.
- 调查CLAD相关的EVs对气道细胞的影响,并验证患者肺组织中的发现.
主要方法:
- 从有或没有CLAD的LT接受者收集了BAL样本.
- 隔离和免疫类型的EVs,然后与呼吸道细胞共同培养.
- 分析了细胞转录组和蛋白质组,通过免疫组织化学验证了目标,并进行了生存分析.
主要成果:
- 与稳定的接受者相比,CLAD患者表现出来自上皮细胞和白细胞的EV增加.
- 暴露于CLAD-EVs上调了p70S6K并激活了气道细胞中的NF-kB信号通路.
- 在患者活检和BAL细胞学中检测到NF-kB激活,与CLAD进展和较差的结果相关.
结论:
- 由RelA驱动的NF-kB激活是通过促进持久性炎症来促进CLAD发展的关键因素.
- 与CLAD相关的EV和NF-kB通路代表了改善长期肺全移植生存的潜在治疗点.
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