一个非正规的cGAS-STING通路驱动细胞和生物的衰老
bioRxiv : the preprint server for biology
|April 16, 2025
概括
衰老的细胞表现出减少激活规范cGAS-STING通路的能力. 相反,一种非正规的途径驱动着炎症,为与年龄相关的疾病提供治疗点.
科学领域:
- 细胞生物学 细胞生物学
- 免疫学 免疫学 免疫学
- 衰老的研究研究.
背景情况:
- 细胞质DNA积累是衰老的标志,通过cGAS-STING通路触发无菌炎症.
- 连接细胞质DNA,cGAS-STING信号和衰老表型的确切机制尚不清楚.
研究的目的:
- 研究cGAS-STING通路在细胞衰老和哈森吉尔福德进展症综合征 (HGPS) 中的作用.
- 为了阐明在衰老中非正规cGAS-STING激活的分子机制.
- 探索针对衰老中的cGAS-STING途径的治疗策略.
主要方法:
- 在老年,衰老和前兆性纤维细胞中分析STING局部化和激活.
- 评估诸如SASP和IFN等炎症标志物的反应.
- 使用合成DNA的功能测试来评估正规cGAS-STING通路的激活.
- 在HGPS模型中对非正规cGAS-STING通路的药理抑制.
主要成果:
- 衰老,衰老和孕病细胞显示非正规的STING局部化和受损的正规通路激活,尽管细胞质DNA积累.
- 这些细胞通过非正规途径以cGAS/STING依赖的方式激活炎症程序 (SASP,IFN).
- 维生素D受体信号传递可以拯救衰老细胞中规范cGAS-STING通路缺陷.
- 抑制非正规途径可以改善衰老的特征,组织退化,并延长前列腺症小鼠模型的寿命.
结论:
- 衰老的特点是对规范cGAS-STING激活能力的减弱,导致一种非规范的亲炎性途径.
- 这种非正规的cGAS-STING通路是衰老表型的关键驱动因素和潜在的治疗点.
- 针对非正规的cGAS-STING通路显示出治疗与年龄相关的疾病和前列腺症的前途.
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