禽流感病毒感染进程中宿主细胞线粒体自噬通路的应答与调控机制研究进展

    Research Progress on the Response and Regulatory Mechanisms of Host Cell Mitophagy Pathway in the Process of Avian Influenza Virus Infection

    • 摘要: 禽流感的频繁暴发给养禽业造成巨大的经济损失,其病原体禽流感病毒(Avian influenza virus,AIV)除了可感染禽类外,部分亚型可跨物种屏障感染人类和其他动物,持续威胁着全球生物安全。自噬作为维持细胞稳态的高度保守降解过程,在病毒感染中扮演着抗病毒与促病毒的双重角色。研究显示,AIV 可通过NS1、M2和PB1-F2等病毒蛋白主动干预自噬流以获取自身复制所需的膜结构并逃避宿主免疫监测,尤其是针对线粒体自噬过程。此外,病毒诱导的线粒体功能紊乱不仅导致活性氧暴发,严重者更有可能进一步引起线粒体氧化膜裂死亡“Mitoxyperilysis”。本文系统梳理了AIV激活线粒体自噬的信号网络,重点剖析病毒蛋白与自噬核心组分的相互作用,深入探讨了线粒体自噬功能障碍引发的氧化应激、脂质过氧化及“线粒体氧化膜裂死亡”效应,旨在为开发靶向宿主线粒体稳态的新型抗病毒策略提供理论依据。

       

      Abstract: The frequent outbreaks of avian influenza have caused huge economic losses to the poultry industry. Its pathogen, avian influenza virus (AIV), can infect not only birds; some subtypes can also cross species barriers and infect humans and other animals, posing a continuous threat to global biosafety. Autophagy, as a highly conserved degradation process that maintains cellular homeostasis, plays a dual role (both antiviral and proviral) in viral infections. Research has shown that AIV can actively intervene in autophagic flux through viral proteins such as NS1, M2, and PB1-F2 to obtain the membrane structures required for self-replication and to evade host immune monitoring, especially targeting mitophagy processes. In addition, virus-induced mitochondrial dysfunction not only leads to an outbreak of reactive oxygen species, but in severe cases, it can further cause mitochondrial oxidative membrane rupture and death, known as “mitoxyperilysis”. Therefore, this article systematically reviews the signaling network of AIV-activated mitophagy, focusing on the interaction between viral proteins and core autophagy components, and deeply explores the oxidative stress, lipid peroxidation, and “mitoxyperilysis” effects caused by mitophagy dysfunction, aiming to provide a theoretical basis for the development of new antiviral strategies targeting host mitochondrial homeostasis.

       

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