| Glucocorticoids mediate stress-induced priming of microglial pro-inflammatory responses. | |
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MedLine Citation:
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PMID: 22041296 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Acute and chronic stress sensitizes or "primes" the neuroinflammatory response to a subsequent pro-inflammatory challenge. While prior evidence shows that glucocorticoids (GCs) play a pivotal role in stress-induced potentiation of neuroinflammatory responses, it remains unclear whether stress-induced GCs sensitize the response of key CNS immune substrates (i.e. microglia) to pro-inflammatory stimuli. An ex vivo approach was used to address this question. Here, stress-induced GC signaling was manipulated in vivo and hippocampal microglia challenged with the pro-inflammatory stimulus LPS ex vivo. Male Sprague-Dawley rats were either pretreated in vivo with the GC receptor antagonist RU486 or adrenalectomized (ADX). Animals were then exposed to an acute stressor (inescapable tailshock; IS) and 24h later hippocampal microglia were isolated and challenged with LPS to probe for stress-induced sensitization of pro-inflammatory responses. Prior exposure to IS resulted in a potentiated pro-inflammatory cytokine response (e.g. IL-1β gene expression) to LPS in isolated microglia. Treatment in vivo with RU486 and ADX inhibited or completely blocked this IS-induced sensitization of the microglial pro-inflammatory response. The present results suggest that stress-induced GCs function to sensitize the microglial pro-inflammatory response (IL-1β, IL-6, NFκBIα) to immunologic challenges. |
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Authors:
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Matthew G Frank; Brittany M Thompson; Linda R Watkins; Steven F Maier |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-10-24 |
Journal Detail:
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Title: Brain, behavior, and immunity Volume: - ISSN: 1090-2139 ISO Abbreviation: - Publication Date: 2011 Oct |
Date Detail:
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Created Date: 2011-11-1 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8800478 Medline TA: Brain Behav Immun Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
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Copyright © 2011. Published by Elsevier Inc. |
Affiliation:
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Department of Psychology and Neuroscience, University of Colorado, Boulder, CO, USA. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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