Journal
JOURNAL OF NEUROIMMUNOLOGY
Volume 208, Issue 1-2, Pages 46-53Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jneuroim.2009.01.010
Keywords
Arc; BDNF; Cytokine; Dentate gyrus; Immediate early gene; Interleukin; Synaptic strengthening
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Funding
- Karolinska Institutet research funds
- Dementia Foundation
- Knut and Alice Wallenberg Foundation
- Stiftelsen for Gamla tjanarinnor Gun
- Bertil Stohne Foundation
- Swedish Brain Power programme
- The Swedish Research Council [12194]
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Interleukin-1 (IL-1) is expressed following LTP induction and is required for long-term memory consolidation. We demonstrate that the long-term, but not short-term memory is impaired in a transgenic mouse strain overexpressing the human soluble interleukin-1 receptor antagonist (hsIL-1ra) in the brain. Overexpression of IL-1ra was found to reduce the basal as well as the novelty-induced upregulation of activity-regulated cytoskeleton-associated protein (Arc) in the dentate gyrus and in the retrosplenial cortex. Together with the finding that blocking IL-1 receptors interferes with the BDNF-ERK1/2 pathway, our data suggest an essential role played by physiological levels of IL-1 in long-term memory consolidation. (C) 2009 Elsevier B.V. All rights reserved.
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