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Cited by 521

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Synaptic Facilitation and Behavioral Sensitization in Aplysia : Possible Role of Serotonin and Cyclic AMP

Brunelli, M., Castellucci, V., Kandel, E. R.·1976·Science

Abstract

The neural changes accompanying sensitization of the gill-withdrawal reflex in Aplysia are associated with presynaptic facilitation at monosynaptic connections between sensory neurons and motor cells. To analyze the molecular mechanisms underlying the facilitation, the pharmacological actions of serotonin, octopamine, and dopamine were examined. Only serotonin enhanced synaptic transmission between the sensory and the motor neurons. A serotonin antagonist, cinanserin, reversibly blocked the synaptic facilitation. The action of serotonin may be mediated by adenosine 3′,5′-monophosphate (cyclic AMP). Exposing the ganglion to dibutyryl cyclic AMP or injecting cyclic AMP into the cell body enhances the synaptic action of a sensory neuron. The mechanism of presynaptic facilitation, therefore, may include activation of one or more serotonergic neurons, which enhance the release of a neurotransmitter by increasing the intracellular concentration of cyclic AMP in the terminals of the sensory neurons.

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Metadata

Authors
Brunelli, M., Castellucci, V., & Kandel, E. R.
Venue
Science
Published
1976-12-10
Volume
194
Issue
4270
Pages
1178-1181
ISSN
  • 0036-8075 (ISSN-L)
  • 1095-9203
OpenAlex
W2005583856
Cited by
521
References
0
FWCI
8.68
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: Synaptic Facilitation and Behavioral Sensitization in Aplysia : Possible Role of Serotonin and Cyclic AMP. https://app.cochat.ai/papers/10.1126/science.186870
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Brunelli, M., Castellucci, V., & Kandel, E. R. (1976). Synaptic Facilitation and Behavioral Sensitization in Aplysia : Possible Role of Serotonin and Cyclic AMP. Science. https://doi.org/10.1126/science.186870

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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.