Cited by 63Neuroscience and Neuropharmacology ResearchNeurotransmitter Receptor Influence on BehaviorRedox biology and oxidative stress

Impaired Attention and Synaptic Senescence of the Prefrontal Cortex Involves Redox Regulation of NMDA Receptors

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Guidi, Michael, Kumar, Ashok, Foster, Thomas C.·2015·The Journal of Neuroscience

Abstract

Young (3–6 months) and middle-age (10–14 months) rats were trained on the five-choice serial reaction time task. Attention and executive function deficits were apparent in middle-age animals observed as a decrease in choice accuracy, increase in omissions, and increased response latency. The behavioral differences were not due to alterations in sensorimotor function or a diminished motivational state. Electrophysiological characterization of synaptic transmission in slices from the mPFC indicated an age-related decrease in glutamatergic transmission. In particular, a robust decrease in N-methyl-d-aspartate receptor (NMDAR)-mediated synaptic responses in the mPFC was correlated with several measures of attention. The decrease in NMDAR function was due in part to an altered redox state as bath application of the reducing agent, dithiothreitol, increased the NMDAR component of the synaptic response to a greater extent in middle-age animals. Together with previous work indicating that redox state mediates senescent physiology in the hippocampus, the results indicate that redox changes contribute to senescent synaptic function in vulnerable brain regions involved in age-related cognitive decline.

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Crossref · 10.1523/jneurosci.3523-14.2015

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  • Many antioxidant genes transcriptionally controlled by synaptic activity in neurons are known NFE2L2 target genes, but are induced via NFE2L2-independent routes (e.g. AP-1 and ATF4), suggesting that activity-dependent signaling may act as a substitute for an absent NFE2L2 pathway.

    “Interestingly, many of the antioxidant genes transcriptionally controlled by synaptic activity in neurons are known NFE2L2 target genes, but are induced via NFE2L2independent routes (e.g. via activator protein 1 (AP-1) family and activating transcription factor 4 (ATF4)), suggesting that activity-dependent signaling may act as a substitute for an absent NFE2L2 pathway 73,86,87 .”
  • NMDAR hypofunction itself leads to cortical oxidative stress and GSH deficits.

    “Critically, there is also a reciprocal relationship: NMDAR hypofunction itself leads to cortical oxidative stress and GSH defcits 73,74 .”
  • Synaptic NMDAR activity enhances the capacity of both the glutathione system and the thioredoxin/peroxiredoxin system through the transcriptional control of several key antioxidant genes.

    “At the cellular level, synaptic NMDAR activity enhances the capacity of both the glutathione system and thioredoxin/peroxiredoxin system (another important antioxidant pathway in the brain 75 ) through the transcriptional control of several key antioxidant genes 73,76,77 (Figure.4).”

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Authors
Guidi, M., Kumar, A., & Foster, T. C.
Affiliations
University of Florida (US)
Venue
The Journal of Neuroscience
Published
2015-03-04
Volume
35
Issue
9
Pages
3966-3977
ISSN
  • 0270-6474 (ISSN-L)
  • 1529-2401
OpenAlex
W1977390472
Cited by
63
References
71
Citations by year
2026: 2 · 2025: 3 · 2024: 5 · 2023: 4 · 2022: 6 · 2021: 7 · 2020: 7 · 2019: 11 · 2018: 2 · 2017: 5 · 2016: 8 · 2015: 3
FWCI
2.76
Type
journal article
Language
en
Open access
Locations
  • Journal of Neuroscience (publishedVersion, cc-by-nc-sa)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Brain Research Foundation
  • McKnight Foundation
  • Evelyn F. McKnight Brain Research Foundation
  • National Institute on Aging (R01AG037984, R37AG036800, P30AG028740)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurotransmitter Receptor Influence on Behavior
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Redox biology and oxidative stress
Keywords
NMDA receptor, redox regulation, prefrontal cortex, attention, executive function, age-related cognitive decline, glutamatergic neurotransmission, oxidative stress, dithiothreitol, 5-choice serial reaction time task, middle age (human life stage), rats
MeSH terms
Aging, Animals, Attention, Cues, Male, Oxidation-Reduction, Rats, Inbred F344, Reaction Time, Serial Learning, Synapses, Receptors, N-Methyl-D-Aspartate, Prefrontal Cortex, Excitatory Postsynaptic Potentials, Rats

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