天体细胞衍生的细胞外囊泡在减轻人脑内皮细胞中细胞毒性和转录组变化的治疗潜力
Ruth Stewart1, K Hope Hutson1, Gergana G Nestorova1
1School of Biological Sciences, Louisiana Tech University, Ruston, LA, 71270, USA.
Neuroscience
|September 29, 2024
概括
星细胞衍生的细胞外囊泡 (EVs) 通过降低人类大脑内皮细胞 (HBECs) 中的神经毒性来显示治疗潜力. 这些EV减轻了氧化DNA损伤和细胞毒性,为神经退行性疾病治疗提供了前景.
科学领域:
- 神经科学是一个神经科学.
- 细胞生物学 细胞生物学
- 生物化学 生化学
背景情况:
- 神经退行性疾病涉及血脑屏障 (BBB) 炎症,影响大脑内皮细胞 (HBEC) 和星球细胞.
- 星球细胞释放细胞外囊泡 (EVs),在维持平衡中发挥作用.
- 天体细胞衍生的EVs在减轻HBEC中神经毒性的治疗潜力在很大程度上仍未被探索.
研究的目的:
- 研究由天体细胞衍生的EVs对HBEC中神经毒性诱导的变化的治疗作用.
- 评估EVs对转录组,线粒体功能和DNA修复机制的影响.
- 评估EVs在减轻氧化DNA损伤和细胞毒性方面的作用.
主要方法:
- 人类大脑内皮细胞 (HBEC) 暴露于神经毒性试剂Na2Cr2O7.
- 从天体细胞衍生出的细胞外囊泡 (EVs) 被注入治疗的细胞中.
- 进行了高通量RNA测序,细胞增殖试验,细胞毒性测量和氧化DNA损伤评估 (8OHdG,OGG1).
- 分析了线粒体形态和副本数.
主要成果:
- 在Na2Cr2O7暴露的HBEC中,由星细胞衍生的EVs减少了氧化DNA损伤 (8OHdG积累).
- 在神经毒性条件下,EVs增加了细胞增殖和降低了细胞毒性.
- 线粒体功能障碍,以减少拷贝数和改变形态的特征,并没有被EVs扭转.
- RNA测序显示,EVs对影响大脑发育和血管生成基因的长非编码RNAs产生调节障碍.
结论:
- 恒星细胞衍生的EV显示出对HBEC的神经毒性的保护作用,特别是在减轻氧化DNA损伤和细胞毒性方面.
- 虽然EVs不能逆转线粒体功能障碍,但他们积极影响细胞对神经毒性侮辱的反应.
- 这些发现突出了由天体细胞衍生的EVs作为神经退行性疾病的潜在治疗剂.
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