从iPSC衍生的外体在自然老化的小鼠中促进血管新生
Xingyu Li1, Heng Zhang1, Xuemeng Wang1
1Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Fudan University, Shanghai, China.
Aging
|June 27, 2023
概括
诱导多能干细胞衍生的外体细胞通过改善血管健康和促进血管生成,使老年小鼠复苏. 这些外体具有针对循环系统的抗衰老疗法的潜力.
科学领域:
- 再生医学是一种再生医学.
- 生物老龄化 生物老龄化
- 血管生物学 血管生物学
背景情况:
- 异常性生菌病表明循环因素影响衰老,但机制尚不清楚.
- 衰老与血管生成能力的降低和组织功能受损有关.
- 干细胞衍生的外体细胞正在研究它们在衰老中的治疗潜力.
研究的目的:
- 评估小鼠诱导多能干细胞 (iPSC) 衍生外体对老年小鼠的再生效应.
- 研究iPSC外体对血管生成,抗氧化能力和衰老中的细胞增殖的影响.
- 评估iPSC外体在衰老的血管系统中的治疗潜力.
主要方法:
- 评估了大动脉环和骨髓细胞增殖的血管性能力.
- 在老老小鼠中测量了总抗氧化能力 (TAOC) 和衰老标志物的表达 (p53,p16).
- 在试验室和体内评估了iPSC外体对受伤的人类静脉内皮细胞 (HUVECs) 的作用.
- 在接受治疗的老老小鼠中分析了血清外体细胞的含量和功能.
主要成果:
- 与年轻小鼠相比,老年小鼠表现出较低的血管生成能力,降低的TAOC和更高的衰老基因表达.
- 从iPSC衍生的外基因组给药显著改善了老年小鼠的血管生成能力,TAOC和细胞增殖.
- 结合体外和体内治疗与iPSC外体恢复了大动脉环血管生成能力,达到年轻小鼠的水平.
- 来自接受治疗的老老小鼠的血清外体显示出增强的蛋白质含量,并促进了内皮细胞的增殖和血管生成.
结论:
- 来自iPSC的外体具有抗衰老特征的再生性质,可以抵消老鼠的老化表型.
- 这些外体可能通过施加抗衰老作用来使身体,特别是血管系统复苏.
- 在与年龄相关的血管衰退中,iPSC外体构成一个有前途的治疗策略.
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