巨细胞中与年龄相关的STING抑制有助于在流感病毒感染期间增加病毒载量
Thurid Lauf1,2, Antje Häder1, Franziska Hornung1
1Institute of Medical Microbiology, Jena University Hospital, Jena, Germany.
Immunity & ageing : I & A
|November 15, 2024
概括
衰老会影响巨细胞对A型流感病毒 (IAV) 的干扰反应. 衰老的巨细胞显示STING信号减少,导致更高的病毒载荷和受损的亡,突出显示与年龄相关的免疫功能障碍.
科学领域:
- 免疫学 免疫学 免疫学
- 病毒学 病毒学
- 老年学是一门学科.
背景情况:
- 衰老是严重流感A型病毒 (IAV) 感染的重要危险因素.
- 巨细胞对抗病毒防御至关重要,但在老年人中功能不佳.
- 衰老对巨细胞对IAV反应的具体影响尚未完全理解.
研究的目的:
- 为了研究人类单细胞衍生巨细胞对H1N1 IAV的反应的年龄相关差异.
- 阐明老年巨细胞中抗病毒免疫力受损背后的分子机制.
主要方法:
- 年轻和年长的人类单细胞衍生巨细胞感染H1N1 IAV的比较.
- 转录组分析以确定差异性基因表达.
- STING (干扰素基因刺激器) 淘汰THP-1细胞模型.
- 评估线粒体功能和DNA释放.
主要成果:
- 在IAV感染后,老化的巨细胞表现出干扰素反应减弱和病毒载量增加.
- 在老年巨细胞中观察到减少了STING基因表达,尽管cGAS-STING通路的上调.
- 线粒体DNA释放激活了cGAS-STING通路,但由于较低的STING信号传导,细胞衰老的诱导被减弱.
结论:
- 衰老导致人类巨细胞中STING的转录下调,损害干扰素生产和抗病毒防御.
- 这种年龄相关的STING功能障碍有助于增加对IAV感染的易感性.
- 这些发现为与年龄相关的免疫衰老和潜在的治疗点提供了新的见解.
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