单纯疱疹病毒 1 感染过程中具有相反功能的细胞外囊泡的多样化群体。
Diverse Populations of Extracellular Vesicles with Opposite Functions during Herpes Simplex Virus 1 Infection.
机构信息
University of Kansas Medical Center, Department of Microbiology, Molecular Genetics and Immunology, Kansas City, Kansas, USA.
NanoView Biosciences, Boston, Massachusetts, USA.
出版信息
J Virol. 2021 Feb 24;95(6). doi: 10.1128/JVI.02357-20.
Extracellular vesicles (EVs) are released by all types of cells as a means of intercellular communication. Their significance lies in the fact that they can alter recipient cell functions, despite their limited capacity for cargo. We have previously demonstrated that herpes simplex virus 1 (HSV-1) infection influences the cargo and functions of EVs released by infected cells and that these EVs negatively impact a subsequent HSV-1 infection. In the present study, we have implemented cutting-edge technologies to further characterize EVs released during HSV-1 infection. We identified distinct EV populations that were separable through a gradient approach. One population was positive for the tetraspanin CD63 and was distinct from EVs carrying components of the endosomal sorting complexes required for transport (ESCRT). Nanoparticle tracking analysis (NTA) combined with protein analysis indicated that the production of CD63 EVs was selectively induced upon HSV-1 infection. The ExoView platform supported these data and suggested that the amount of CD63 per vesicle is larger upon infection. This platform also identified EV populations positive for other tetraspanins, including CD81 and CD9, whose abundance decreased upon HSV-1 infection. The imulator of terferon enes (STING) was found in CD63 EVs released during HSV-1 infection, while viral components were found in ESCRT EVs. Functional characterization of these EVs demonstrated that they have opposite effects on the infection, but the dominant effect was negative. Overall, we have identified the dominant population of EVs, and other EV populations produced during HSV-1 infection, and we have provided information about potential roles. Extracellular vesicles mediate cell-to-cell communication and convey messages important for cell homeostasis. Pathways of EV biogenesis are often hijacked by pathogens to facilitate their dissemination and to establish a favorable microenvironment for the infection. We have previously shown that HSV-1 infection alters the cargo and functions of the released EVs, which negatively impact the infection. We have built upon our previous findings by developing procedures to separate EV populations from HSV-1-infected cells. We identified the major population of EVs released during infection, which carries the DNA sensor STING and has an antiviral effect. We also identified an EV population that carries selected viral proteins and has a proviral role. This is the first study to characterize EV populations during infection. These data indicate that the complex interactions between the virus and the host are extended to the extracellular environment and could impact HSV-1 dissemination and persistence in the host.
细胞外囊泡 (EVs) 是所有类型的细胞释放的一种细胞间通讯方式。它们的重要性在于,尽管它们的货物携带能力有限,但它们可以改变受体细胞的功能。我们之前已经证明,单纯疱疹病毒 1 (HSV-1) 感染会影响感染细胞释放的 EVs 的货物和功能,并且这些 EVs 会对随后的 HSV-1 感染产生负面影响。在本研究中,我们采用了尖端技术来进一步表征 HSV-1 感染期间释放的 EVs。我们鉴定了通过梯度方法可分离的不同 EV 群体。一种群体对四跨膜蛋白 CD63 呈阳性,与携带内体分选复合物必需的运输成分 (ESCRT) 的 EV 不同。纳米颗粒跟踪分析 (NTA) 结合蛋白质分析表明,HSV-1 感染后会选择性诱导 CD63 EV 的产生。ExoView 平台支持这些数据,并表明感染时每个囊泡的 CD63 量更大。该平台还鉴定了对其他四跨膜蛋白(包括 CD81 和 CD9)呈阳性的 EV 群体,这些蛋白的丰度在 HSV-1 感染后降低。HSV-1 感染期间释放的 CD63 EV 中发现了干扰素基因刺激物 (STING),而 ESCRT EV 中发现了病毒成分。这些 EV 的功能特征表明,它们对感染有相反的影响,但主要影响是负面的。总体而言,我们已经确定了 HSV-1 感染期间释放的主要 EV 群体和其他 EV 群体,并提供了有关潜在作用的信息。细胞外囊泡介导细胞间通讯,并传递对细胞稳态重要的信息。EV 生物发生途径通常被病原体劫持,以促进其传播并为感染建立有利的微环境。我们之前已经表明,HSV-1 感染会改变释放的 EV 的货物和功能,从而对感染产生负面影响。我们通过开发从 HSV-1 感染细胞中分离 EV 群体的程序,在此基础上进行了研究。我们鉴定了感染期间释放的主要 EV 群体,该群体携带 DNA 传感器 STING,具有抗病毒作用。我们还鉴定了一种携带选定病毒蛋白并具有促病毒作用的 EV 群体。这是首次对感染期间 EV 群体进行特征描述的研究。这些数据表明,病毒和宿主之间的复杂相互作用扩展到细胞外环境,并可能影响 HSV-1 在宿主中的传播和持续存在。
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