Cited by 223Neuroscience and Neuropharmacology ResearchStress Responses and CortisolMemory and Neural Mechanisms

Tissue plasminogen activator and plasminogen mediate stress-induced decline of neuronal and cognitive functions in the mouse hippocampus

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Pawlak, Robert, Rao, B. S. Shankaranarayana, Melchor, Jerry P., Chattarji, Sumantra, McEwen, Bruce, Strickland, Sidney·2005·Proceedings of the National Academy of Sciences

Abstract

Repeated stress can impair function in the hippocampus, a brain structure essential for learning and memory. Although behavioral evidence suggests that severe stress triggers cognitive impairment, as seen in major depression or posttraumatic stress disorder, little is known about the molecular mediators of these functional deficits in the hippocampus. We report here both pre- and postsynaptic effects of chronic stress, manifested as a reduction in the number of NMDA receptors, dendritic spines, and expression of growth-associated protein-43 in the cornu ammonis 1 region. Strikingly, the stress-induced decrease in NMDA receptors coincides spatially with sites of plasminogen activation, thereby predicting a role for tissue plasminogen activator (tPA) in this form of stress-induced plasticity. Consistent with this possibility, tPA-/- and plasminogen-/- mice are protected from stress-induced decrease in NMDA receptors and reduction in dendritic spines. At the behavioral level, these synaptic and molecular signatures of stress-induced plasticity are accompanied by impaired acquisition, but not retrieval, of hippocampal-dependent spatial learning, a deficit that is not exhibited by the tPA-/- and plasminogen-/- mice. These findings establish the tPA/plasmin system as an important mediator of the debilitating effects of prolonged stress on hippocampal function at multiple levels of neural organization.

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Cited by

Sorted by citations

Authors
Pawlak, R., Rao, B. S. S., Melchor, J. P., Chattarji, S., McEwen, B., & Strickland, S.
Affiliations
Tata Institute of Fundamental Research (IN)
Venue
Proceedings of the National Academy of Sciences
Published
2005-12-05
Volume
102
Issue
50
Pages
18201-18206
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W2140273147
Cited by
223
References
45
Citations by year
2026: 2 · 2025: 6 · 2024: 3 · 2023: 7 · 2022: 7 · 2021: 9 · 2020: 12 · 2019: 8 · 2018: 10 · 2017: 9 · 2016: 20 · 2015: 21 · 2014: 11 · 2013: 10 · 2012: 18
FWCI
3.45
Type
journal article
Language
en
Open access
Locations
  • Proceedings of the National Academy of Sciences (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • Leicester Research Archive (University of Leicester) (submittedVersion)
Funders
  • Wellcome Trust
  • National Institute of Mental Health (MH-41256, R37MH041256, R01MH041256)
  • National Institute of Neurological Disorders and Stroke (NS-38472, R01NS035704, NS35704, R01NS038472)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Neuroscience › Behavioral Neuroscience › Stress Responses and Cortisol
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory and Neural Mechanisms
Keywords
tissue plasminogen activator, plasminogen, chronic stress, hippocampus, NMDA receptor, dendritic spines, growth-associated protein 43, cornu ammonis 1, spatial learning, cognitive impairment
MeSH terms
Analysis of Variance, Animals, Hippocampus, Immunohistochemistry, Plasminogen, Tissue Plasminogen Activator, Restraint, Physical, Stress, Physiological, Blotting, Western, Receptors, N-Methyl-D-Aspartate, Mice, Knockout, Maze Learning, Dendritic Spines, Mice

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