TLR3原始化条件对MSC免疫抑制性质的影响
Tatiana Tolstova1, Ekaterina Dotsenko1, Peter Kozhin1
1Institute of Biomedical Chemistry, Pogodinskaya, Moscow, Russia, 119121.
Stem cell research & therapy
|November 30, 2023
概括
优化介质细胞 stromal 细胞 (MSCs) 预先条件与多酸-多酸 (poly(I:C)) 增强他们的免疫抑制性质. 这种原始化协议激活MSC中的Toll-like受体3 (TLR3),提高其用于细胞治疗的治疗潜力.
科学领域:
- 细胞生物学 细胞生物学
- 免疫学 免疫学 免疫学
- 再生医学是一种再生医学.
背景情况:
- 介酶体 stromal 细胞 (MSCs) 具有再生和免疫调节能力,使其成为细胞治疗的有希望的候选人.
- 在MSC上,通类受体 (TLR) 通过分泌免疫抑制或促炎因素来调节对病毒存在的反应.
- 该TLR3连接体,多诺辛酸-多西酸 (poly(I:C),可以改变MSC表达的抗炎分子基于度和暴露时间.
研究的目的:
- 优化MSCs的预条件使用poly (I:C) 来增强其免疫抑制作用.
- 为了识别和表征具有激活TLR3的MSC,称为初始化MSC (prMSC),以提高治疗潜力.
主要方法:
- 多重复合体暴露于不同度 (1和10微克/毫升) 和持续时间 (1,3,和24小时) 的聚I:C.
- 分析了免疫表型,分化潜力,免疫抑制标记物的表达 (IDO1,WARS1,PD-L1,TSG-6) 和PGE2分泌.
- 用Jurkat T细胞进行的共同培养实验评估了增殖,亡,IL-10分泌和IL-2产生. 蛋白质组分析确定了与TLR3激活相关的蛋白质.
主要成果:
- 3小时使用10μg/mL poly (I:C) 进行预约,最大限度地提高了MSCs中免疫抑制标志物的表达.
- 与原生MSC相比,激活的prMSC显著降低了Jurkat T细胞的增殖和增加了细胞亡.
- 蛋白质组分析揭示了参与抗病毒反应的蛋白质的改变表达,IFN I信号传递和prMSCs中的细胞粘附,与增强的抗炎作用相关.
结论:
- 在MSC中TLR3的激活是通过poly (I:C) 度和暴露时间微调的,在10μg/mL3小时内达到最佳的免疫抑制.
- 这种优化的MSC预先调节协议有效地增强了prMSC对T细胞的免疫抑制能力.
- 在prMSCs中发现的分子变化为潜在的基于细胞的疗法提供了对它们增强的抗炎机制的见解.
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