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Spatial Long-Term Memory Is Related to Mossy Fiber Synaptogenesis
Open accessAbstract
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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“ATRAmediated prevention of synaptic loss in the stratum lucidum of the CA3 area, in which the mossy fibers from the dentate gyrus synapse with the dendrites of the pyramidal neurons, may play a key role in rescuing deficits of learning and memory”
From Retinoic Acid Attenuates β-Amyloid Deposition and Rescues Memory Deficits in an Alzheimer's Disease Transgenic Mouse Model (2008) · cites this paper as Ramirez-Amaya et al., 2001
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Metadata
- 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
- Publisher
- Society for Neuroscience
- Published
- 2001-09-15
- Volume
- 21
- Issue
- 18
- Pages
- 7340-7348
- ISSN
- 0270-6474 (ISSN-L)
- 1529-2401
- PMC
- PMC6763009
- 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
- bronze
- doi.org
- 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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