Cited by 54Traumatic Brain Injury and Neurovascular DisturbancesTraumatic Brain Injury ResearchNeurotransmitter Receptor Influence on Behavior

Altered adrenergic receptor signaling following traumatic brain injury contributes to working memory dysfunction

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Kobori, N., Hu, B., Dash, P.K.·2011·Neuroscience

Abstract

The prefrontal cortex is highly vulnerable to traumatic brain injury (TBI) and its structural and/or functional alterations as a result of TBI can give rise to persistent working memory (WM) dysfunction. Using a rodent model of TBI, we have described profound WM deficits following TBI that are associated with increases in prefrontal catecholamine (both dopamine and norepinephrine) content. In this study, we examined if enhanced norepinephrine signaling contributes to TBI-associated WM dysfunction. We demonstrate that administration of α1 adrenoceptor antagonists, but not α2A agonist, at 14 days post-injury significantly improved WM performance. mRNA analysis revealed increased levels of α1A, but not α1B or α1D, adrenoceptor in the medial prefrontal cortex (mPFC) of brain-injured rats. As α1A and 1B adrenoceptor promoters contain putative cAMP response element (CRE) sequences, we therefore examined if CRE-binding protein (CREB) actively engages these sequences in order to increase receptor gene transcription following TBI. Our results show that the phosphorylation of CREB is enhanced in the mPFC at time points during which increased α1A mRNA expression was observed. Chromatin immunoprecipitation (ChIP) assays using mPFC tissue from injured animals indicated increased phospho-CREB binding to the CRE sites of α1A, but not α1B, promoter compared to that observed in uninjured controls. To address the translatability of our findings, we tested the efficacy of the FDA-approved α1 antagonist Prazosin and observed that this drug improves WM in injured animals. Taken together, these studies suggest that enhanced CREB-mediated expression of α1 adrenoceptor contributes to TBI-associated WM dysfunction, and therapies aimed at reducing α1 signaling may be useful in the treatment of TBI-associated WM deficits in humans.

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Crossref · 10.1016/j.neuroscience.2010.10.048

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  • TBI induces elevated α1-AR expression that contributes to working memory impairment.

    “Similarly, traumatic brain injury (TBI) induces elevated catecholamine signaling in the PFC107 and elevated α1-AR expression that contributes to working memory impairment108.”

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Research works printed but not linked: 3

  1. Coggeshall RE Lekan HA (Methods for determining numbers of cells and synapses: a case for more uniform standards of review. J Comp Neurol 1996 364 6 15 8789272
  2. Dash PK Mach SA Moore AN (Enhanced neurogenesis in the rodent hippocampus following traumatic brain injury. J Neurosci Res 2001 63 313 319 11170181
  3. Steele RJ Morris RG (Delay-dependent impairment of a matching-to-place task with chronic and intrahippocampal infusion of the NMDA-antagonist D-AP5. Hippocampus 1999 9 118 136 10226773

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Authors
Kobori, N., Hu, B., & Dash, P. K.
Affiliations
The University of Texas Health Science Center at Houston (US)
Corresponding author
Kobori, N.
Venue
Neuroscience
Publisher
Elsevier BV
Published
2011-01
Volume
172
Pages
293-302
ISSN
0306-4522 (ISSN-L)
OpenAlex
W1992605879
Cited by
53
References
44
Citations by year
2026: 2 · 2025: 2 · 2024: 1 · 2023: 4 · 2022: 4 · 2021: 5 · 2020: 2 · 2019: 5 · 2018: 5 · 2017: 3 · 2016: 1 · 2015: 5 · 2014: 8 · 2013: 3
FWCI
0.95
Type
journal article
Language
en
Open access
Locations
  • Neuroscience (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
National Institutes of Health
Topics
  • Health Sciences › Medicine › Neurology › Traumatic Brain Injury and Neurovascular Disturbances
  • Health Sciences › Medicine › Epidemiology › Traumatic Brain Injury Research
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurotransmitter Receptor Influence on Behavior
Keywords
traumatic brain injury, alpha1-adrenoceptors, norepinephrine signaling, prefrontal cortex, CREB phosphorylation, cAMP response element, alpha1A-adrenoceptor, alpha1B-adrenoceptor, prazosin, catecholamines
MeSH terms
Animals, Brain Injuries, Disease Models, Animal, Epinephrine, Male, Memory Disorders, Memory, Short-Term, Prazosin, Signal Transduction, Rats, Sprague-Dawley, Receptors, Adrenergic, alpha-1, Rats, Adrenergic alpha-1 Receptor Antagonists

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