由肠干细胞衍生的细胞外囊泡改善死性肠球炎损伤
Le Zhang1, Jiahong Li2, Qiwen Wan3
1Department of Neonatology, Affiliated Children's Hospital of Jiangnan University, Wuxi Children's Hospital, 214023, Wuxi, Jiangsu, China; Key Laboratory of Birth Defects, Children's Hospital, Institutes of Biomedical Sciences, Fudan University, Shanghai, China.
Molecular and cellular probes
|December 7, 2024
概括
肠干细胞衍生的细胞外囊泡 (ISCs-EVs) 显示出治疗死性肠球炎 (NEC) 的前景. 这些囊泡改善了生存率,减少了肠道损伤,并在临床前模型中促进了愈合.
科学领域:
- 胃肠病学 胃肠病学
- 再生医学是一种再生医学.
- 细胞生物学 细胞生物学
背景情况:
- 结核性肠球炎 (NEC) 是一种严重的疾病,治疗选择有限.
- 在NEC中,肠干细胞衍生的细胞外囊泡 (ISCs-EVs) 的治疗潜力在很大程度上尚未被探索.
研究的目的:
- 研究ISCs-EVs对NEC的治疗作用.
- 在NEC模型中评估ISCs-EVs对肠道愈合,炎症和血管生成的影响.
主要方法:
- 从小鼠中分离出Lgr5阳性肠干细胞 (ISC) 和它们衍生的细胞外囊泡 (ISC-EV).
- 通过传输电子显微镜,纳米粒子跟踪分析和西部抹影来描述ISCs-EVs.
- 评估ISCs-EVs在NEC和体外细胞培养 (IEC-6和LS174T细胞) 的小鼠模型中的疗效.
主要成果:
- 在小鼠NEC模型中,ISCs-EVs治疗增加了20%以上的存活率.
- 通过恢复密室和降低MPO和分裂-caspase 3表达,减少了肠道损伤.
- 促进了血管生成 (VEGF mRNA ~35%的增加) 和减轻了炎症 (减少了MUC1,p-NF-κB,IL-6,TNF-α).
- 在体外,ISCs-EVs降低了IEC-6细胞的亡 (P<0.01) 并刺激了IEC-6细胞的增殖 (P<0.05),增强了LS174T细胞中的粘素分泌.
结论:
- ISCs-EVs显示出对死性肠球炎具有显著的治疗潜力.
- 这些发现支持进一步发展ISCs-EVs作为NEC的新治疗策略.
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