纯氨酸核酸酸化酶主导流感A病毒的复制和宿主通过纯氨酸救援的超炎症
Yang Yue1, Qingyu Li1, Changguo Chen2
1Bioinformatics Center of AMMS, Beijing, China.
Signal transduction and targeted therapy
|June 14, 2025
概括
甲型流感病毒 (IAV) 感染会激活氨酸核酸酶 (PNP),这是氨酸救援中的关键酶. 针对PNP提供了一种通过控制病毒复制和炎症来对抗IAV的新策略.
科学领域:
- 病毒学 病毒学
- 免疫学 免疫学 免疫学
- 代谢途径 代谢途径
背景情况:
- 流感A型病毒 (IAV) 感染对全球健康构成重大威胁.
- 在IAV诱导病理的基础上的分子机制,特别是病毒与宿主相互作用,仍然不完全理解.
- 识别对IAV病原发生至关重要的宿主因素对于开发有效的抗病毒策略至关重要.
研究的目的:
- 为了研究宿主 purin代谢在 IAV 感染中的作用.
- 为了识别宿主蛋白质,在IAV与宿主相互作用中充当枢纽.
- 通过调节宿主 purin 救援通路来探索IAV的潜在治疗点.
主要方法:
- 构建一个病毒性炎症蛋白-蛋白相互作用 (VI-PPI) 网络.
- 整合了来自IAV感染患者的血蛋白质组学数据.
- 产生和分析特定于膜上皮细胞 (AEC) 的PNP条件淘汰赛小鼠.
- 研究IAV PB1-F2与PNP促进体的相互作用.
- 在PNP调节后评估 purin代谢转移.
- 在体内评估Durdihydroartemisinin (DHA) 作为PNP抑制剂.
主要成果:
- 纯核酸酸酶 (PNP) 被确定为连接IAV感染阶段的中心枢纽基因.
- 在AEC特定的PNP淘汰赛小鼠中,H1N1感染后的生存率增加和肺炎炎症减少.
- IAV PB1-F2直接与PNP促进体结合,增强感染AEC中的纯素救援.
- 在IAV感染患者和细胞中证实了PNP激活和 purin救援.
- 抑制PNP将 purin代谢转移到de novo合成,通过APRT-AICAR-AMPK抑制病毒复制和炎症.
- 预测的PNP抑制剂DHA在感染H1N1的小鼠中改善了生存率和体重增加.
结论:
- 通过IAV激活的PNP在病毒复制和高炎症中发挥着关键作用,通过纯素救援.
- 准PNP介导的纯素救援是一种针对IAV的双重治疗策略.
- 在抗流感疗法中,PNP是一个有前途的新型宿主导目标.
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