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Related Experiment Video

Updated: Jul 17, 2026

Rapid In Situ Hybridization using Oligonucleotide Probes on Paraformaldehyde-prefixed Brain of Rats with Serotonin Syndrome

Rapid In Situ Hybridization using Oligonucleotide Probes on Paraformaldehyde-prefixed Brain of Rats with Serotonin Syndrome

Published on: September 23, 2015

Do serotonin(1-7) receptors modulate short and long-term memory?

¹Depto de Farmacobiología, CINVESTAV-IPN, Tenorios 235, Granjas Coapa, México City, Mexico. ameneses@msn.com

Neurobiology of Learning and Memory

|January 17, 2007

Summary

Serotonin (5-hydroxytryptamine; 5-HT) influences memory. Blocking 5-HT(1B) receptors improved both short-term and long-term memory, suggesting a serial role in memory consolidation.

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Published on: June 26, 2013

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Last Updated: Jul 17, 2026

Rapid In Situ Hybridization using Oligonucleotide Probes on Paraformaldehyde-prefixed Brain of Rats with Serotonin Syndrome

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Improved Preparation and Preservation of Hippocampal Mouse Slices for a Very Stable and Reproducible Recording of Long-term Potentiation

Improved Preparation and Preservation of Hippocampal Mouse Slices for a Very Stable and Reproducible Recording of Long-term Potentiation

Published on: June 26, 2013

Area of Science:

Neuroscience
Pharmacology
Cognitive Science

Background:

Serotonin (5-hydroxytryptamine; 5-HT) is known to modulate memory processes across species.
Understanding the specific roles of different serotonin receptor subtypes in short-term memory (STM) and long-term memory (LTM) is crucial for cognitive research.

Purpose of the Study:

To investigate the contribution of serotonin, cholinergic, and glutamatergic receptors, alongside protein synthesis, to STM and LTM in an autoshaping learning task.
To elucidate the specific serotonin receptor subtypes involved in memory formation and consolidation.

Main Methods:

Administration of various receptor antagonists and inhibitors of protein synthesis and mRNA.
Assessment of performance in an autoshaping learning task to evaluate STM and LTM.
Analysis of the effects of selective and non-selective serotonin receptor antagonists on memory recall.

Main Results:

Inhibition of hippocampal protein synthesis or mRNA impaired LTM but not STM.
Non-selective 5-HT receptor antagonism (cyproheptadine) facilitated STM, while glutamatergic and cholinergic blockade impaired it.
Selective 5-HT(1B) receptor antagonism (SB-224289) facilitated both STM and LTM.
Several other selective serotonin receptor antagonists (e.g., for 5-HT(1A), 5-HT(2A), 5-HT(2C/2B), 5-HT(4), 5-HT(6)) facilitated LTM but not STM.

Conclusions:

Serotonin tone via 5-HT(1B) receptors appears to play a serial role in the transition from STM to LTM.
Other serotonin receptor subtypes (5-HT(1A), 5-HT(2A), 5-HT(2B/2C), 5-HT(4), 5-HT(6)) may function in parallel pathways during memory processing.
Protein synthesis is essential for LTM but not STM in this learning paradigm.