上海大学学报(自然科学版) ›› 2024, Vol. 30 ›› Issue (2): 208-217.doi: 10.12066/j.issn.1007-2861.2552

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装载ACE2 的植物来源细胞外囊泡防治PM2.5 暴露后细胞损伤

叶旋, 钤, 王红云, 周蕾   

  1. 1. 南京医科大学第一附属医院 心内科, 南京 210029; 2. 上海大学 生命科学学院, 上海 200444
  • 出版日期:2024-04-30 发布日期:2024-05-14
  • 通讯作者: 周 蕾 (1970—), 女, 教授, 博士生导师, 博士, 研究方向为心衰的基础与临床研究. E-mail:zhoulei7005@163.com
  • 基金资助:
    国家自然科学基金面上资助项目 (81970723); 上海市教育发展基金会和上海市教委 “晨光计划” 资助项目(20CG46)

Plant-derived extracellular vesicles loaded with ACE2 prevent cell damage after PM2.5 exposure

YE Xuan, QIAN Yuan, WANG Hongyun, ZHOU Lei   

  1. 1. Department of Cardiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China; 2. School of Life Science, Shanghai University, Shanghai 200444, China
  • Online:2024-04-30 Published:2024-05-14

摘要: 探究装载血管紧张素转化酶2(angiotensin converting enzyme 2, ACE2) 的植物来源 细胞外囊泡(plant-derived extracellular vesicles, PDEVs) 在保护机体抵抗空气污染颗粒物 (particulate matter, PM2.5) 引发的呼吸系统损伤过程中的作用. 基于葡萄提取PDEVs 并装 载ACE2 过表达的质粒, 通过CCK8 实验、二氢乙锭(dihydroethidium, DHE) 染色、蛋白 免疫印迹、实时荧光定量多聚酶链反应(polymerase chain reaction, PCR) 等方法, 探究改造 后的PDEVs 对PM2.5 暴露后人支气管上皮细胞(Beas-2B) 的保护效果. PM2.5 暴露会造成 Beas-2B 细胞氧化应激、细胞凋亡增加, 以及炎症因子增加, 而装载ACE2 的PDEVs 能够有 效递送ACE2, 从而缓解PM2.5 诱导的细胞损伤. 因此, PDEVs 可作为潜在的递送载体, 防 治大气PM2.5 暴露引发的细胞凋亡及损伤.

关键词: 细胞外囊泡, 血管紧张素转化酶 2, PM2.5, 葡萄

Abstract: To investigate the efficacy of plant-derived extracellular vesicles (PDEVs) loaded with angiotensin-converting enzyme 2 (ACE2) in mitigating respiratory system dam-age induced by particulate matter (PM2.5), we extracted PDEVs from grapes and loaded them with ACE2 overexpression plasmids. The effect of the modified PDEVs on human bronchial epithelial cells (Beas-2B) after exposure to PM2.5 was investigated using CCK8 assays, dihydroethidium (DHE) staining, western blotting, and real-time quantitative poly-merase chain reaction (PCR). Exposure to PM2.5 increases oxidative stress, apoptosis, and inflammatory factor production in Beas-2B cells. PDEVs loaded with ACE2 effectively delivered ACE2 to cells and thereby alleviated PM2.5-induced cell damage including apop-tosis, oxidative stress, and inflammation. PDEVs thus show potential for use as carriers of genes that can prevent apoptosis and damage caused by atmospheric PM2.5 exposure.

Key words: extracellular vesicles, angiotensin-converting enzyme 2 (ACE2), PM2.5, grapes

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