Cited by 32Mosquito-borne diseases and controlInfectious Encephalopathies and EncephalitisNeuroinflammation and Neurodegeneration Mechanisms

Neurological sequelae induced by alphavirus infection of the CNS are attenuated by treatment with the glutamine antagonist 6-diazo-5-oxo-l-norleucine

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Potter, Michelle C., Baxter, Victoria K., Mathey, Robert W., Alt, Jesse, Rojas, Camilo, Griffin, Diane E., Slusher, Barbara S.·2015·Journal of NeuroVirology

Abstract

Recovery from encephalomyelitis induced by infection with mosquito-borne alphaviruses is associated with a high risk of lifelong debilitating neurological deficits. Infection of mice with the prototypic alphavirus, Sindbis virus, provides an animal model with which to study disease mechanisms and examine potential therapeutics. Infectious virus is cleared from the brain within a week after infection, but viral RNA is cleared slowly and persists for the life of the animal. However, no studies have examined the effect of infection on neurocognitive function over time. In the present study, we examined neurocognitive function at different phases of infection in 5-week-old C57BL/6 mice intranasally inoculated with Sindbis virus. At the peak of active virus infection, mice demonstrated hyperactivity, decreased anxiety, and marked hippocampal-dependent memory deficits, the latter of which persisted beyond clearance of infectious virus and resolution of clinical signs of disease. Previous studies indicate that neuronal damage during alphavirus encephalomyelitis is primarily due to inflammatory cell infiltration and glutamate excitotoxicity rather than directly by virus infection. Therefore, mice were treated with 6-diazo-5-oxo-l-norleucine (DON), a glutamine antagonist that can suppress both the immune response and excitotoxicity. Treatment with DON decreased inflammatory cell infiltration and cell death in the hippocampus and partially prevented development of clinical signs and neurocognitive impairment despite the presence of infectious virus and high viral RNA levels. This study presents the first report of neurocognitive sequelae in mice with alphavirus encephalomyelitis and provides a model system for further elucidation of the pathogenesis of virus infection and assessment of potential therapies.

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  • Research on mice inoculated with encephalitic viruses has demonstrated significant hippocampal impairment and memory deficits, as evidenced by fear conditioning tests and active avoidance experiments.

    “Furthermore, research on mice inoculated with encephalitic viruses has demonstrated significant hippocampal impairment and memory deficits, as evidenced by fear conditioning tests (Potter et al., 2015) and active avoidance experiments.”

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  1. Griffin DE Knipe DM Howley PM 2013 Alphaviruses Fields Virology 6 Lippincott Williams & Wilkins Philadelphia 652 686

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Authors
Potter, M. C., Baxter, V. K., Mathey, R. W., Alt, J., Rojas, C., Griffin, D. E., & Slusher, B. S.
Affiliations
Johns Hopkins University (US)
Corresponding author
  • Griffin, Diane E.
  • Slusher, Barbara S.
Venue
Journal of NeuroVirology
Published
2015-02-03
Volume
21
Issue
2
Pages
159-173
ISSN
  • 1355-0284 (ISSN-L)
  • 1538-2443
OpenAlex
W1970803505
Cited by
32
References
65
Citations by year
2026: 5 · 2024: 2 · 2023: 1 · 2022: 1 · 2021: 5 · 2020: 2 · 2019: 2 · 2018: 5 · 2017: 3 · 2016: 6
FWCI
25.49
Type
book chapter
Language
en
Open access
Locations
  • Journal of NeuroVirology (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • Johns Hopkins University
  • National Institutes of Health (T32OD011089)
  • National Institute of Mental Health (P30MH075673)
  • National Institute on Drug Abuse (R03DA032470)
  • National Institute of Neurological Disorders and Stroke (R01NS087539, R01NS038932)
Topics
  • Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Mosquito-borne diseases and control
  • Health Sciences › Medicine › Infectious Diseases › Infectious Encephalopathies and Encephalitis
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
Keywords
Sindbis virus, 6-diazo-5-oxo-L-norleucine, glutamine antagonist, neurocognitive impairment, hippocampal-dependent memory, glutamate excitotoxicity, neuroinflammation, inflammatory cell infiltration, neuroprotection, viral persistence, mouse model
MeSH terms
Animals, Antimetabolites, Antineoplastic, Behavior, Animal, Diazooxonorleucine, Disease Models, Animal, Enzyme-Linked Immunosorbent Assay, Glutamine, Immunohistochemistry, Male, Mice, Inbred C57BL, Motor Activity, Sindbis Virus, Alphavirus Infections, Encephalitis, Viral, Mice

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