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气液界面培养猪呼吸道上皮细胞的转录组分析显示,β冠状病毒猪传染性脑脊髓炎病毒感染诱导强烈的干扰素反应。

Transcriptome Analysis in Air-Liquid Interface Porcine Respiratory Epithelial Cell Cultures Reveals That the Betacoronavirus Porcine Encephalomyelitis Hemagglutinating Virus Induces a Robust Interferon Response to Infection.

机构信息

Infectious Bacterial Disease Research Unit, National Animal Disease Center, United States Department of Agriculture, Agricultural Research Service, Ames, IA 50010, USA.

Department of Veterinary Diagnostic and Production Animal Medicine, College of Veterinary Medicine, Iowa State University, Ames, IA 50011, USA.

出版信息

Viruses. 2024 Jun 11;16(6):939. doi: 10.3390/v16060939.

Abstract

Porcine hemagglutinating encephalomyelitis virus (PHEV) replicates in the upper respiratory tract and tonsils of pigs. Using an air-liquid interface porcine respiratory epithelial cells (ALI-PRECs) culture system, we demonstrated that PHEV disrupts respiratory epithelia homeostasis by impairing ciliary function and inducing antiviral, pro-inflammatory cytokine, and chemokine responses. This study explores the mechanisms driving early innate immune responses during PHEV infection through host transcriptome analysis. Total RNA was collected from ALI-PRECs at 24, 36, and 48 h post inoculation (hpi). RNA-seq analysis was performed using an Illumina Hiseq 600 to generate 100 bp paired-end reads. Differential gene expression was analyzed using DeSeq2. PHEV replicated actively in ALI-PRECs, causing cytopathic changes and progressive mucociliary disruption. Transcriptome analysis revealed downregulation of cilia-associated genes such as , , , , and , and acidic sialomucin . PHEV also activated antiviral signaling pathways, significantly increasing the expression of interferon-stimulated genes (, , , and ) and chemokine genes ( and ), highlighting inflammatory regulation. This study contributes to elucidating the molecular mechanisms of the innate immune response to PHEV infection of the airway epithelium, emphasizing the critical roles of the mucociliary, interferon, and chemokine responses.

摘要

猪传染性脑脊髓炎病毒(PHEV)在上呼吸道和扁桃体中复制。我们使用气液界面猪呼吸道上皮细胞(ALI-PRECs)培养系统,证明 PHEV 通过损害纤毛功能和诱导抗病毒、促炎细胞因子和趋化因子反应来破坏呼吸上皮细胞的稳态。本研究通过宿主转录组分析探讨了 PHEV 感染早期固有免疫反应的机制。在接种后 24、36 和 48 小时收集 ALI-PRECs 的总 RNA。使用 Illumina Hiseq 600 进行 RNA-seq 分析,生成 100 bp 配对末端读数。使用 DeSeq2 分析差异基因表达。PHEV 在 ALI-PRECs 中积极复制,导致细胞病变和进行性黏液纤毛破坏。转录组分析显示纤毛相关基因如 、 、 、 、 和酸性唾液粘蛋白 的下调。PHEV 还激活了抗病毒信号通路,显著增加了干扰素刺激基因( 、 、 、 )和趋化因子基因( 和 )的表达,强调了炎症调节。本研究有助于阐明气道上皮细胞对 PHEV 感染的固有免疫反应的分子机制,强调了黏液纤毛、干扰素和趋化因子反应的关键作用。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5429/11209522/fe0d7ba51886/viruses-16-00939-g001.jpg

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