Abstract |
Viral infections of the CNS and their accompanying inflammation can cause long-term neurological effects, including increased risk for seizures. To examine the effects of CNS inflammation, we infused polyinosinic:polycytidylic acid, intracerebroventricularly to mimic a viral CNS infection in 14 day-old rats. This caused fever and an increase in the pro-inflammatory cytokine, interleukin (IL)-1beta in the brain. As young adults, these animals were more susceptible to lithium- pilocarpine and pentylenetetrazol-induced seizures and showed memory deficits in fear conditioning. Whereas there was no alteration in adult hippocampal cytokine levels, we found a marked increase in NMDA (NR2A and C) and AMPA (GluR1) glutamate receptor subunit mRNA expression. The increase in seizure susceptibility, glutamate receptor subunits, and hippocampal IL-1beta levels were suppressed by neonatal systemic minocycline. Thus, a novel model of viral CNS inflammation reveals pathophysiological relationships between brain cytokines, glutamate receptors, behaviour and seizures, which can be attenuated by anti-inflammatory agents like minocycline.
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Authors | M A Galic, K Riazi, A K Henderson, S Tsutsui, Q J Pittman |
Journal | Neurobiology of disease
(Neurobiol Dis)
Vol. 36
Issue 2
Pg. 343-51
(Nov 2009)
ISSN: 1095-953X [Electronic] United States |
PMID | 19660546
(Publication Type: Comparative Study, Journal Article, Research Support, Non-U.S. Gov't)
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Chemical References |
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Topics |
- Aging
(pathology)
- Animals
- Animals, Newborn
- Disease Susceptibility
- Encephalitis
(pathology, physiopathology, virology)
- Female
- Hippocampus
(growth & development, pathology, virology)
- Learning
(physiology)
- Male
- Pregnancy
- Rats
- Rats, Sprague-Dawley
- Receptors, Glutamate
(biosynthesis)
- Seizures
(etiology, pathology, physiopathology)
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