与免疫相关的基因由与戈尔吉功能和ARF-1 GTPase相关的膜应激通路刺激
Matthew J Fanelli1, Christofer M Welsh1,2, Dominique S Lui1
1Program in Molecular Medicine, UMASS Chan Medical School, Worcester, MA, USA.
Science advances
|December 6, 2023
概括
在C. elegans中,免疫相关基因 (ILG) 对病原体的攻击和酸丁胆 (PC) 脂质水平的变化作出反应. 这表明ILG是影响分泌功能的膜应激反应的一部分.
科学领域:
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
- 免疫学 免疫学 免疫学
背景情况:
- 免疫相关基因 (ILG) 在C. elegans*中通过病原体的挑战被上调.
- 在脂质新陈代谢的扰乱期间,ILG也被上调,但潜在的机制尚不清楚.
- 了解免疫反应和代谢变化之间的联系对于细胞健康至关重要.
研究的目的:
- 调查病原体攻击和脂质代谢变化的机制,都会激活ILG.
- 探索酸丁胆 (PC) 水平和分泌器官在ILG激活中的作用.
- 为了确定ILG上调是否是对分泌应激的协调反应.
主要方法:
- 使用C. elegans作为一个模型生物.
- 研究ILG激活,以应对酸丁胆 (PC) 水平的变化.
- 采用RNA干扰 (RNAi) 针对ADP-核糖化因子*arf-1*来破坏戈尔吉和分泌功能.
- 评估了ILG敲击对记者蛋白和补充融合蛋白的分泌的影响.
主要成果:
- 当酸丁胆 (PC) 水平在分泌器官膜中发生变化时,ILG会被激活.
- 通过*arf-1*RNAi破坏戈尔吉和分泌功能也会激活ILG.
- 发现低PC水平限制了ARF-1功能,这表明ILG激活的机制是由脂质代谢驱动的.
- 选择ILG的RNAi导致蛋白质分泌的缺陷和对病原体反应的蛋白质的积累.
结论:
- 一些ILG的升级监管是对蜂贩运变化的协调反应.
- 这种反应可能有助于抵消分泌功能的压力,将脂质代谢与免疫基因表达联系起来.
- 这些发现表明,膜应激反应的新途径在内质网膜外运行.
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