The effect of influenza A (H1N1) pdm09 virus infection on cytokine production and gene expression in BV2 microglial cells.

Abstract

Acute influenza infection has been reported to be associated with neurological symptoms such as influenza-associated encephalopathy (IAE). Although the pathophysiology of this condition remain unclear, neuroinflammation and associated alterations in the central nervous system (CNS) are usually induced. Microglia (MGs), CNS-resident macrophages, are generally the first cells to be activated in response to brain infection or damage. We performed reverse transcriptase droplet digital PCR (RT-ddPCR) and luminex assays to investigate virus proliferation and immune reactions in BV2 MGs infected with influenza A(H1N1)pdm09 virus. Furthermore, isobaric tags for relative and absolute quantitation (iTRAQ)-based quantitative proteomics methods were used to investigate the dynamic change in the protein expression profile in BV2 MGs to gain insight into the CNS response to influenza A (H1N1) pdm09 infection. Our results showed that the influenza A(H1N1)pdm09 virus was replicative and productive in BV2 MG cells, which produced cytokines such as interleukin (IL)-1β, IL-6, tumour necrosis factor (TNF)-α and monocyte chemoattractant protein (MCP)-1. The expression of osteopontin (OPN) in the influenza A (H1N1) pdm09-infected BV2 MGs was upregulated at 16 and 32 h post-infection (hpi) compared to that in the control group, resulting in aggravated brain damage and inflammation. Our study indicates that OPN signalling might provide new insights into the treatment of CNS injury and neurodegenerative diseases in IAE.

• Authors: Xiao-Man Ding, Yi-Fang Wang, Yan Lyu, Yao Zou, Xin Wang, Shi-Man Ruan, Wei-Hua Wu, Hui Liu, Ying Sun, Ren-Li Zhang, Hong Zhao, Ying Han, Bao-Tian Zhao, Jing Pan, Xiu-Yun Han, Chun-Rong Wang, Huai-Long Zhao, Guo-Liang Yang, Lan-Zheng Liu, Shi-Song Fang
• Journal: Virus research (Virus Res) Vol. 312 Pg. 198716 (04 15 2022) ISSN: 1872-7492 [Electronic] Netherlands
• PMID: 35240224 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
• Copyright: Copyright © 2022 The Authors. Published by Elsevier B.V. All rights reserved.

Chemical References

• Cytokines

Topics

• Cytokines (genetics)
• Gene Expression
• Humans
• Influenza A Virus, H1N1 Subtype (genetics)
• Influenza, Human
• Microglia