Cited by 177Memory and Neural MechanismsNeuroscience and Neuropharmacology ResearchNeurogenesis and neuroplasticity mechanisms

Spatial long-term memory is related to mossy fiber synaptogenesis

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Ramı́rez-Amaya, Victor, Balderas, Israela, Sandoval, Jimena, Escobar, Martha L., Bermúdez-Rattoni, Federico·2001·The Journal of Neuroscience

Abstract

Structural synaptic changes have been suggested to underlie long-term memory formation. In this work, we investigate if hippocampal mossy fiber synaptogenesis induced by water maze overtraining can be related with long-term spatial memory performance. Rats were trained in a Morris water maze for one to five identical daily sessions and tested for memory retrieval 1 week and 1 month after training. After the last test session, the rat brains were obtained and processed for Timm's staining to analyze mossy fiber projection. The behavioral results showed that with more training, animals showed a better performance in the memory tests, and this performance positively correlates with Timm's staining in the stratum oriens. Furthermore, with the use of the NMDA antagonist MK801 before, but not after acquisition, water maze spatial memory was impaired. Increased Timm's staining in the stratum oriens was observed in the animals treated with MK801 after acquisition but not in those treated before. Finally, we observed that mossy fiber synaptogenesis occurs mainly in the septal region of the dorsal hippocampus, supporting the idea that this anterior region is important for spatial memory. Altogether, these results suggest that mossy fiber synaptogenesis can be related with spatial long-term memory formation.

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Crossref · 10.1523/jneurosci.21-18-07340.2001

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  1. Dudai Y (1989) Some basic notions and their ontogenesis. In: The neurobiology of memory: concepts, findings, trends, Chap 1, pp 3-18. New York: Oxford UP.

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Authors
Ramı́rez-Amaya, V., Balderas, I., Sandoval, J., Escobar, M. L., & Bermúdez-Rattoni, F.
Affiliations
Universidad Nacional Autónoma de México (MX)
Venue
The Journal of Neuroscience
Published
2001-09-15
Volume
21
Issue
18
Pages
7340-7348
ISSN
  • 0270-6474 (ISSN-L)
  • 1529-2401
OpenAlex
W1840921431
Cited by
177
References
52
Citations by year
2026: 1 · 2025: 3 · 2024: 1 · 2023: 1 · 2022: 4 · 2021: 2 · 2020: 4 · 2019: 6 · 2018: 3 · 2017: 7 · 2016: 9 · 2015: 11 · 2014: 3 · 2013: 11 · 2012: 12
FWCI
4.02
Type
journal article
Language
en
Open access
Locations
  • Journal of Neuroscience (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
Dirección General de Asuntos del Personal Académico, Universidad Nacional Autónoma de México
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory and Neural Mechanisms
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Neuroscience › Developmental Neuroscience › Neurogenesis and neuroplasticity mechanisms
Keywords
hippocampus, dorsal hippocampus, stratum oriens, MK-801, NMDA receptor, memory consolidation, septal area
MeSH terms
Animals, Behavior, Animal, Coloring Agents, Hippocampus, Learning, Male, Memory, Retention, Psychology, Synapses, Receptors, N-Methyl-D-Aspartate, Rats, Wistar, Excitatory Amino Acid Antagonists, Maze Learning, Mossy Fibers, Hippocampal, Rats

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