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脏,但不是血小板或皮肤,细胞外囊泡降低氧化应激,增强新生的合成,并防止缺血性损伤
Jesus H Dominguez1,2, Danhui Xie1, K J Kelly1,2
1Division of Nephrology and Hypertension, Department of Medicine, Indiana University School of Medicine, Indianapolis, Indiana, United States.
American journal of physiology. Renal physiology
|June 15, 2023
概括
器官特异性细胞外囊泡 (EVs) 显示出治疗急性损伤 (AKI) 的前景. 脏EVs,但不是皮肤或血小板EVs,在临床前AKI模型中改善了功能和减少了氧化应激.
科学领域:
- 腎臟病學 (nephrology) 是一種醫學專業.
- 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:
- 急性损伤 (AKI) 是一个重大的临床挑战,除了透析之外,治疗选择有限.
- 细胞外囊泡 (EVs),包括外体,正在成为潜在的治疗剂.
- 之前的研究表明,细胞衍生的EVs在实验性AKI中具有有益作用.
研究的目的:
- 在缺血性急性损伤中研究EV介导保护的器官特异性.
- 阐明 EVs 施加保护作用的潜在机制.
- 测试非脏来源 (皮肤,血小板) 的EV是否提供类似的好处.
主要方法:
- 在动物中利用了一种成熟的急性损伤缺血-再输血模型.
- 在衰竭发作后,从细胞,皮肤细胞或血小板中提取的细胞外囊.
- 评估功能 (例如,肌素水平),组织学,氧化应激标志物 (超氧化物转化酶,催化酶) 和抗炎性细胞因子 (互乐金-10) 水平.
主要成果:
- 脏细胞外囊泡显著改善功能和组织学后缺血,即使在确定的功能衰竭后给予.
- 来自皮肤或血小板的细胞外囊泡没有产生类似的保护作用.
- 脏EV治疗导致氧化压力降低,保护关键抗氧化酶,并增加了互白素-10水平.
- 提出了一种新的机制,涉及脏EVs增强的新生合成.
结论:
- 特定器官的细胞外囊泡,特别是来自细胞的细胞,在急性损伤中具有治疗潜力.
- 保护作用与减少氧化应激,增强抗炎反应和潜在改善的蛋白质合成有关.
- 这些发现为探索脏EVs作为AKI的向治疗提供了原则证明.
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