代谢重编程提示通过稳定干扰素γ诱导的IRF1来稳定疫苗病毒感染结果
bioRxiv : the preprint server for biology
|October 17, 2024
概括
代谢影响干扰素刺激基因 (ISG) 蛋白质表达,揭示了一个新的调节层. 葡萄糖和银河糖介质不同地影响干扰素-诱导的IRF1,影响病毒复制,并表明可适应的免疫反应.
科学领域:
- 免疫学和病毒学
- 细胞代谢和基因调控
背景情况:
- 干扰素 (IFN) 刺激的基因 (ISG) 对于抗病毒防御至关重要,但其超出初级信号的调节尚未完全理解.
- 在疾病中观察到异常的ISG表达,这表明没有特征的调节机制.
- 细胞代谢,特别是葡萄糖与银河糖的利用,影响细胞的身份和对病毒的易感性.
研究的目的:
- 研究细胞代谢 (有氧糖解与氧化酸化) 如何影响ISG表达和功能.
- 确定控制关键ISG蛋白质的新型监管途径,例如IRF1.
- 确定代谢调节对病毒复制的功能影响.
主要方法:
- 在富含葡萄糖 (糖解) 或富含银河糖 (氧化酸化) 的介质中培养人类,小鼠和猫的细胞.
- 用干涉子 (IFN-α,IFN-γ) 刺激细胞,并分析ISGRNA和蛋白质表达.
- 利用IRF1的蛋白酶体抑制和淘汰 (KO) 来剖析调节机制.
- 在不同的条件下评估了疫苗病毒 (天花病毒) 和疹病毒的病毒复制.
主要成果:
- 葡萄糖和银河糖介质不同调节ISGRNA和蛋白质表达,治疗方法之间的差异大于代谢物之间的差异.
- 干扰素原始化导致明显的蛋白质表达:IRF1在IFN-γ/葡萄糖上调,IFITM3在银河糖上调.
- 对IRF1的代谢调节在各个物种中都保持不变,并且取决于蛋白酶体活性.
- 葡萄糖/IFN-γ降低了疫苗病毒复制,依赖IRF1;银河糖条件显示影响较小.
- 在特定的代谢条件下,观察到影响疹和天花病毒标位的病毒复制的晚期阻断.
结论:
- 细胞代谢,特别是葡萄糖与银河糖的利用,代表了关键ISG蛋白质如IRF1.1的新型调节层.
- 这种代谢控制影响抗病毒防御的有效性和病毒复制结果.
- 这些发现表明,干扰素反应包含了可以适应感染和扩散期间变化的代谢物水平的子程序.
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