Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Molecular Pathogenesis and Immune Evasion of Vesicular Stomatitis Virus Inferred from Genes Expression Changes in Infected Porcine Macrophages

Version 1 : Received: 27 July 2021 / Approved: 30 July 2021 / Online: 30 July 2021 (09:27:29 CEST)

How to cite: Velazquez-Salinas, L.; Canter, J.A.; Zhu, J.J.; Rodriguez, L.L. Molecular Pathogenesis and Immune Evasion of Vesicular Stomatitis Virus Inferred from Genes Expression Changes in Infected Porcine Macrophages. Preprints 2021, 2021070687 (doi: 10.20944/preprints202107.0687.v1). Velazquez-Salinas, L.; Canter, J.A.; Zhu, J.J.; Rodriguez, L.L. Molecular Pathogenesis and Immune Evasion of Vesicular Stomatitis Virus Inferred from Genes Expression Changes in Infected Porcine Macrophages. Preprints 2021, 2021070687 (doi: 10.20944/preprints202107.0687.v1).

Abstract

Molecular mechanisms associated with the pathogenesis of Vesicular stomatitis virus (VSV) in livestock remain poorly understood. Several studies have highlighted the relevant role of macrophages in controlling the systemic dissemination of VSV during infection in different animal models, including mice, cattle and pigs. To gain more insight on the molecular mechanisms used by VSV to impair the immune response in macrophages, we used microarrays to determine the transcriptomic changes produced by VSV infection in primary cultures of porcine macrophages. The results indicated that VSV infection induced the massive expression of multiple anorexic, pyrogenic, proinflammatory and immunosuppressive genes. Overall, the interferon (IFN) response appeared suppressed, leading to the absence of stimulation of interferon-stimulated genes (ISG). Interestingly, VSV infection promoted the expression of several genes known to downregulate the expression of IFNb. This represents an alternate mechanism for VSV control of the IFN response, beyond the recognized mechanisms mediated by the matrix protein. Although there was no significant differential gene expression in macrophages infected with a highly virulent epidemic strain compared to a less virulent endemic strain, the endemic strain consistently induced higher expression of all upregulated cytokines and chemokines. Collectively, this study provides novel insights into VSV molecular pathogenesis and immune evasion that warrants further investigation

Keywords

Vesicular Stomatitis Virus; macrophage; microarray analysis; differential gene expression; molecular pathogenesis; immune evasion

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