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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Allan, S. M. Rothwell, N. J. Parker, L. C. Davies, R. Luheshi, G. N. Collins, B. |
| Description | Author Affiliation: Allan SM ( School of Biological Sciences, 1.124 Stopford Building, University of Manchester, Oxford Road, Manchester, M13 9PT, United Kingdom.); |
| Abstract | The cytokine IL-1 mediates diverse forms of neurodegeneration, but its mechanism of action is unknown. We have demonstrated previously that exogenous and endogenous IL-1 acts specifically in the rat striatum to dramatically enhance ischemic and excitotoxic brain damage and cause extensive cortical injury. Here we tested the hypothesis that this distant effect of IL-1 is mediated through polysynaptic striatal outputs to the cortex via the hypothalamus. We show that IL-1beta injected into the rat striatum with the excitotoxin alpha-amino-3-hydroxy-5-methyl-4-isoxazolepropionate (S-AMPA) caused increased expression of IL-1beta (mRNA and protein) mainly in the cortex where maximum injury occurs. Marked increases in IL-1beta mRNA and protein were also observed in the hypothalamus. S-AMPA, injected alone into the striatum, caused only localized damage, but administration of IL-1beta into either the striatum or the lateral hypothalamus immediately after striatal S-AMPA resulted in widespread cell loss throughout the ipsilateral cortex. Finally we showed that the cortical cell death produced by striatal coinjection of S-AMPA and IL-1beta was significantly reduced by administration of the IL-1 receptor antagonist into the lateral hypothalamus. These data suggest that IL-1beta can act in the hypothalamus to modify cell viability in the cortex. We conclude that IL-1-dependent pathways project from the striatum to the cortex via the hypothalamus and lead to cortical injury, and that these may contribute to a number of human neurological conditions including stroke and head trauma. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 10 |
| Volume Number | 97 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 2000-06-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Cerebral Cortex Pathology Hypothalamus Immunology Interleukin-1 Genetics Toxicity Neurons Alpha-Amino-3-hydroxy-5-methyl-4-isoxazolepropionic Acid Animals Drug Effects Corpus Striatum Interleukin 1 Receptor Antagonist Protein Kinetics Models, Neurological Rats, Sprague-Dawley Recombinant Proteins Pharmacology Reverse Transcriptase Polymerase Chain Reaction Sialoglycoproteins Time Factors Research Support, Non-U.S. Gov't Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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