Abstract
The behavioral effects of peripherally administered interleukin-1β (IL-1β) are mediated by the production of cytokines and other proinflammatory mediators at the level of the blood-brain interface and by activation of neural pathway. To assess whether this action is mediated by NFκB activation, rats were injected into the lateral ventricle of the brain with a specific inhibitor of NFκB activation, the NEMO Binding Domain (NBD) peptide that has been shown previously to abolish completely IL-1β-induced NFκB activation and Cox-2 synthesis in the brain microvasculature. NFκB pathway inactivation significantly blocked the behavioral effects of intraperitoneally administered IL-1β in the form of social withdrawal and decreased food intake, and dramatically reduced IL-1β-induced c-Fos expression in various brain regions as paraventricular nucleus, supraoptic nucleus, and lateral part of the central amygdala. These findings strongly support the hypothesis that IL-1β-induced NFκB activation at the blood-brain interface is a crucial step in the transmission of immune signals from the periphery to the brain that underlies further events responsible of sickness behavior.
Original language | English (US) |
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Pages (from-to) | 1492-1499 |
Number of pages | 8 |
Journal | Neuropsychopharmacology |
Volume | 30 |
Issue number | 8 |
DOIs | |
State | Published - Aug 2005 |
Externally published | Yes |
Keywords
- In vivo
- Interleukin-1β
- NFkappaB
- Sickness behavior
- c-Fos
ASJC Scopus subject areas
- Pharmacology
- Psychiatry and Mental health