鼻内人类NSC衍生的EVs疗法可以抑制炎症性微质转录组,NLRP3和cGAS-STING信号传递,在老年海马中
bioRxiv : the preprint server for biology
|February 6, 2026
概括
来自神经干细胞 (hiPSC-NSC-EVs) 的鼻腔外细胞囊减少海马中的神经炎症. 这种疗法通过调节微质通路来改善老年小鼠的认知功能和大脑健康.
科学领域:
- 神经科学是一个神经科学.
- 免疫学 免疫学 免疫学
- 老年学是指老年学的学科.
背景情况:
- 神经炎症,以慢性海马体炎症为特征,驱动与年龄相关的认知衰退.
- 这种炎症涉及核酸结合域,氨酸丰富的重复家族和含有3 (NLRP3) 炎症酶的皮林域和cGAS-STING-IFN-1通路.
- 来自人类诱导多能干细胞衍生神经干细胞 (hiPSC-NSC-EVs) 的细胞外囊泡具有可以减轻神经炎症的治疗性小RNA.
研究的目的:
- 调查鼻内hiPSC-NSC-EVs在减轻老年小鼠神经炎症方面的治疗潜力.
- 确定hiPSC-NSC-EVs对海马体炎症,氧化应激和相关信号通路的影响.
- 在hiPSC-NSC-EV中识别特定的miRNA,负责抑制关键炎症途径.
主要方法:
- 在中年老鼠 (18个月大) 中给入鼻的hiPSC-NSC-EVs,并在20.5个月后进行评估.
- 分析海马组织的天体细胞缩,微质激活,氧化应激标志物和蛋白质/基因表达.
- 用RAW细胞和微质单细胞RNA测序进行体外检测,以阐明miRNA机制和转录基因变化.
主要成果:
- hiPSC-NSC-EVs治疗减少了海马的天体细胞缩,微质和氧化应激.
- 治疗降低了NLRP3炎症酶,p38 MAPK,cGAS-STING-IFN-1和JAK-STAT信号通路的激活.
- 在hiPSC-NSC-EVs中的miRNA-30e-3p和miRNA-181a-5p分别被确定为NLRP3和STING通路的关键抑制剂.
- 单细胞RNA测序揭示了hiPSC-NSC-EVs调节的微质转录组,增强氧化酸化并减少促炎性基因表达.
- 这些分子变化与治疗小鼠的认知和记忆功能改善有关.
结论:
- 内鼻式hiPSC-NSC-EV有效地减少老年海马中的神经炎症.
- 该疗法减少了亲炎性微质信号级联,促进了老化中的更好的大脑功能.
- hiPSC-NSC-EVs代表了与年龄相关的认知衰退的有前途的治疗策略.
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