亡体通过PDL1-PD1介导的巨细胞代谢重编程来抑制炎症
Tao Jiang1, Yanmin Xia1,2, Wenzhe Wang2
1Department of Thoracic Surgery, Tangdu Hospital, Fourth Military Medical University, Xi'an, China.
Cell proliferation
|August 9, 2023
概括
来自介酶干细胞 (MSC) 的亡体重编程巨细胞,以减少急性肺损伤 (ALI) 中的炎症. 这涉及PD-L1在亡体上与巨细胞上的PD-1相互作用,为ALI患者提供潜在的治疗策略.
科学领域:
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
- 再生医学是一种再生医学.
背景情况:
- 亡在免疫调节中起作用,但其调节免疫反应的机制尚未完全理解.
- 介质细胞干细胞 (MSCs) 移植显示,尽管细胞存活时间短,但长期免疫调节,这表明非生物成分的作用.
- 急性肺损伤 (ALI) 的特点是炎症,需要有效的免疫调节策略.
研究的目的:
- 在ALI的小鼠模型中研究由人类带MSCs (UC-MSCs) 衍生出来的亡体 (ABs) 的免疫调节机制.
- 确定通过UC-MSCs衍生的ABs对巨细胞施加抗炎作用的分子途径.
- 探索这些发现对ALI治疗的潜在临床影响.
主要方法:
- 使用了ALI的小鼠模型.
- 给人带MSCs (UC-MSCs) 进行了异性化治疗,并分析了它们的亡体 (ABs) 的影响.
- 使用编程细胞死亡11 (PDL1) 和编程细胞死亡蛋白1 (PD1) 途径研究了UC-MSC衍生的AB和宿主巨之间的相互作用.
- 通过Erk-依赖途径分析了巨细胞的代谢重编程.
- 使用ALI患者的膜巨细胞验证的结果.
主要成果:
- 在ALI小鼠中,UC-MSC衍生的AB有效地将促炎性巨细胞转化为抗炎性表型,改善了疾病.
- 在UC-MSC衍生的ABs上表达的PD-L1被确定为一个关键的调解者,与宿主巨细胞上的PD-1相互作用.
- 这种PDL1-PD1相互作用诱导了巨细胞中的代谢切换,从糖解转向线粒体氧化酸化,通过依赖Erk的途径.
- 观察到的ABs对巨细胞代谢的影响在ALI患者的膜巨细胞中复制.
结论:
- 来自UC-MSC的亡体具有强大的免疫调节特性,可以解决ALI中的炎症.
- PD-L1/PD-1轴和随后的巨细胞代谢重编程是UC-MSC衍生的ABs治疗作用的关键机制.
- 这些发现突显了UC-MSC衍生的ABs作为ALI和潜在的其他炎症性疾病的无细胞治疗策略的潜力.
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