溶酶体作为β冠状病毒 PHEV 从神经细胞中排出的中介的作用。

The role of lysosomes as intermediates in betacoronavirus PHEV egress from nerve cells.

机构信息

State Key Laboratory for Diagnosis and Treatment of Severe Zoonotic Infectious Diseases, Key Laboratory for Zoonosis Research of the Ministry of Education, Institute of Zoonosis, and College of Veterinary Medicine, Jilin University, Changchun, Jilin, China.

Jilin Academy of Animal Husbandry and Veterinary Medicine, Changchun, Jilin, China.

出版信息

J Virol. 2023 Dec 21;97(12):e0133823. doi: 10.1128/jvi.01338-23. Epub 2023 Nov 27.

Abstract

Betacoronaviruses, including severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) and mouse hepatitis virus (MHV), exploit the lysosomal exocytosis pathway for egress. However, whether all betacoronaviruses members use the same pathway to exit cells remains unknown. Here, we demonstrated that porcine hemagglutinating encephalomyelitis virus (PHEV) egress occurs by Arl8b-dependent lysosomal exocytosis, a cellular egress mechanism shared by SARS-CoV-2 and MHV. Notably, PHEV acidifies lysosomes and activates lysosomal degradative enzymes, while SARS-CoV-2 and MHV deacidify lysosomes and limit the activation of lysosomal degradative enzymes. In addition, PHEV release depends on V-ATPase-mediated lysosomal pH. Furthermore, this is the first study to evaluate βCoV using lysosome for spreading through the body, and we have found that lysosome played a critical role in PHEV neural transmission and brain damage caused by virus infection in the central nervous system. Taken together, different betacoronaviruses could disrupt lysosomal function differently to exit cells.

摘要

β 冠状病毒,包括严重急性呼吸综合征冠状病毒 2(SARS-CoV-2)和鼠肝炎病毒(MHV),利用溶酶体胞吐途径进行出芽。然而,并非所有β 冠状病毒成员都使用相同的途径离开细胞,这一点尚不清楚。在这里,我们证明猪传染性脑脊髓炎病毒(PHEV)通过依赖于 Arl8b 的溶酶体胞吐作用出芽,这是 SARS-CoV-2 和 MHV 共有的细胞出芽机制。值得注意的是,PHEV 酸化溶酶体并激活溶酶体降解酶,而 SARS-CoV-2 和 MHV 去酸化溶酶体并限制溶酶体降解酶的激活。此外,PHEV 的释放取决于 V-ATPase 介导的溶酶体 pH。此外,这是第一项使用溶酶体评估βCoV 全身传播的研究,我们发现溶酶体在 PHEV 神经传播和病毒感染中枢神经系统引起的脑损伤中发挥关键作用。总之,不同的β 冠状病毒可能会以不同的方式破坏溶酶体功能以离开细胞。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3f5b/10734498/27be61611fa9/jvi.01338-23.f001.jpg

文献AI研究员

20分钟写一篇综述,助力文献阅读效率提升50倍

立即体验

用中文搜PubMed

大模型驱动的PubMed中文搜索引擎

马上搜索