Cited by 221Memory and Neural MechanismsNeuroscience and Neuropharmacology ResearchMemory Processes and Influences

The role of NMDA glutamate receptors, PKA, MAPK, and CAMKII in the hippocampus in extinction of conditioned fear

Szapiro, German, Vianna, Monica R.M., McGaugh, James L., Medina, Jorge H., Izquierdo, Ivan·2003·Hippocampus

Abstract

Pavlovian conditioning involves the association of initially neutral conditioned stimuli (CS) with unconditioned stimuli (US) that elicit a response. In contextual fear conditioning in rodents, the CS is the context of a training apparatus and the US is a foot shock. Retrieval of memory of the training is tested by presenting the CS alone. But a retrieval test also initiates extinction of the conditioned response. That is, presentation of the CS alone results in new learning, i.e., the CS no longer predicts the US. Here we report that extinction is triggered by two hippocampal signaling pathways underlying retrieval (the cAMP‐dependent protein kinase and the mitogen‐activated protein kinase pathways) and two other mechanisms that become activated at the same time and are not necessary for retrieval (N‐methyl‐D‐aspartate glutamatergic receptors and the calcium/calmodulin‐dependent protein kinase II signaling pathway). Thus, the molecular mechanisms underlying acquisition and/or consolidation of the memory for extinction are similar to those described for the acquisition and/or consolidation of the original contextual fear. Hippocampus 2003;13:53–58. © 2003 Wiley‐Liss, Inc.

Integrity signals

Registry

Crossref · 10.1002/hipo.10043

Cites

30 of 30 references verified0 citation errors · 0 not checkable

Statistics

Recomputing p-values needs the paper’s full text.

Claims the paper makes

This paper’s full text isn’t openly available, so its claims and self-check weren’t run. The registry and citation checks still apply.

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

Cites

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Szapiro, G., Vianna, M. R. M., McGaugh, J. L., Medina, J. H., & Izquierdo, I.
Affiliations
  • University of California, Irvine (US)
  • Universidad de Buenos Aires (AR)
Venue
Hippocampus
Publisher
Wiley
Published
2002-10-28
Volume
13
Issue
1
Pages
53-58
ISSN
  • 1050-9631 (ISSN-L)
  • 1098-1063
OpenAlex
W2046861885
Cited by
221
References
29
Citations by year
2025: 3 · 2024: 2 · 2023: 3 · 2022: 4 · 2021: 5 · 2020: 5 · 2019: 7 · 2018: 6 · 2017: 7 · 2016: 5 · 2015: 15 · 2014: 14 · 2013: 13 · 2012: 10
FWCI
5.70
Type
journal article
Language
en
Open access
closed
Locations
  • Hippocampus (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory and Neural Mechanisms
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory Processes and Influences
Keywords
fear extinction, contextual fear conditioning, NMDA receptor, protein kinase A, mitogen-activated protein kinase, calcium/calmodulin-dependent protein kinase II, memory retrieval, memory consolidation, classical conditioning, glutamate signaling
MeSH terms
Animals, Conditioning, Psychological, Enzyme Inhibitors, Extinction, Psychological, Fear, Hippocampus, Learning, Male, Memory, Synaptic Transmission, Synapses, Receptors, N-Methyl-D-Aspartate, Rats, Wistar, Cyclic AMP-Dependent Protein Kinases, Calcium-Calmodulin-Dependent Protein Kinases, Excitatory Amino Acid Antagonists, MAP Kinase Signaling System, Rats, Calcium-Calmodulin-Dependent Protein Kinase Type 2

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review