Inflammatory & Apoptotic Factor Fluctuations Associated with Japanese Encephalitis Virus Infection in Transgenic IFNAR1 ^-/- Mice.

Publisher: Springer International Country of Publication: United States NLM ID: 7808448 Publication Model: Electronic Cited Medium: Internet ISSN: 1432-0991 (Electronic) Linking ISSN: 03438651 NLM ISO Abbreviation: Curr Microbiol Subsets: MEDLINE

Original Publication: New York, Springer International.

Receptor, Interferon alpha-beta*/genetics ; Encephalitis, Japanese*/virology ; Encephalitis, Japanese*/genetics ; Encephalitis, Japanese*/immunology ; Cytokines*/metabolism ; Cytokines*/genetics ; Encephalitis Virus, Japanese*/genetics ; Mice, Inbred C57BL* ; Apoptosis* ; Mice, Knockout*; Animals ; Mice ; Female ; Mice, Transgenic ; Disease Models, Animal ; Brain/virology ; Inflammation

Japanese encephalitis virus (JEV) is an orthoflavivirus that causes Japanese encephalitis, a mosquito-borne viral infection that primarily affects humans and animals. JEV is a major cause of encephalitis in many parts of Asia, particularly in rural and agricultural areas. In this study, we used the IFNAR1 ^-/- mice model to investigate alterations in cytokine and apoptotic factor levels in IFNAR1 ^-/- mice upon JEV infection. A 5-week-adult female C57BL/6 IFN-α/β receptor knockout (IFNAR1 ^-/- ) transgenic mice were intramuscularly inoculated with several viral titers and monitored within 10 dpi. The weight changes and survival rates were evaluated during the study period. Gene expression analysis was performed using RT-qPCR, targeting genes related to specific cytokines and apoptotic factors, to identify the inflammatory factors fluctuations associated with JEV strain KBPV-VR-27 infection in IFNAR1 ^-/- mice. The expression of cytokine genes was enhanced in IFNAR1 ^-/- mice infected with JEV KBPV-VR-27. Notably, a significant induction of cytokines, such as IL-13, IL-17α, IFN-β, and IFN-γ, was observed in the brain, while upregulation of IL-6, IFN-β, and IFN-γ was exhibited in the lung. In addition, among the targeted apoptotic factors, only significant induction of Bak was observed in the brain. We also found that the spleen exhibited a higher viral load compared to the brain and lungs. In conclusion, the findings of this study shed light on the varying viral loads across targeted organs, with the brain exhibiting a lower viral load but pronounced expression of targeted pro-inflammatory cytokines in IFNAR1 ^-/- mice.
(© 2024. The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.)

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2019R1A2C200216812 korean national foundation of research

156986-95-7 (Receptor, Interferon alpha-beta)
0 (Cytokines)
0 (Ifnar1 protein, mouse)

Date Created: 20240623 Date Completed: 20240623 Latest Revision: 20240623

20240624

10.1007/s00284-024-03759-w

38910205