ArticleProceedings of the National Academy of Sciences of the United States of America2006
G protein betagamma-subunits activated by serotonin mediate presynaptic inhibition by regulating vesicle fusion properties.
Article in Proceedings of the National Academy of Sciences of the United States of America, 2006. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 36 papers.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
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Who cites it
36 citing papers in PubMed, 75 citations in OpenAlex.
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- Sex differences in metabolic regulation by Gi/o-coupled receptor modulation of exocytosis.Frontiers in pharmacology · 2025Article
- Excess phosphoserine-129 α-synuclein induces synaptic vesicle trafficking and declustering defects at a vertebrate synapse.Molecular biology of the cell · 2024Article
- Single Calcium Channel Nanodomains Drive Presynaptic Calcium Entry at Lamprey Reticulospinal Presynaptic Terminals.The Journal of neuroscience : the official journal of the Society for Neuroscience · 2022Article
- Synaptic Integration of Subquantal Neurotransmission by Colocalized G Protein-Coupled Receptors in Presynaptic Terminals.The Journal of neuroscience : the official journal of the Society for Neuroscience · 2022Article
- The serotonin reuptake blocker citalopram destabilizes fictive locomotor activity in salamander axial circuits through 5-HTJournal of neurophysiology · 2020Article
- Serotonergic Modulation of Locomotor Activity From Basal Vertebrates to Mammals.Frontiers in neural circuits · 2020Review
- Gβγ SNARE Interactions and Their Behavioral Effects.Neurochemical research · 2019Review
- Disabling the Gβγ-SNARE interaction disrupts GPCR-mediated presynaptic inhibition, leading to physiological and behavioral phenotypes.Science signaling · 2019Article
- The expanding roles and mechanisms of G protein-mediated presynaptic inhibition.The Journal of biological chemistry · 2019Review
- GPCR regulation of secretion.Pharmacology & therapeutics · 2018Review
- Synaptic Vesicle Endocytosis in Different Model Systems.Frontiers in cellular neuroscience · 2018Review
- Dopamine-mediated calcium channel regulation in synaptic suppression in L. stagnalis interneurons.Channels (Austin, Tex.) · 2018Article
- A Presynaptic Group III mGluR Recruits Gβγ/SNARE Interactions to Inhibit Synaptic Transmission by Cone Photoreceptors in the Vertebrate Retina.The Journal of neuroscience : the official journal of the Society for Neuroscience · 2017Article
- Accumulation of KThe Journal of physiology · 2017Article
- Kiss-and-Run Is a Significant Contributor to Synaptic Exocytosis and Endocytosis in Photoreceptors.Frontiers in cellular neuroscience · 2017Article
- The Nucleus Accumbens: Mechanisms of Addiction across Drug Classes Reflect the Importance of Glutamate Homeostasis.Pharmacological reviews · 2016Review
- Sensory Activation of Command Cells for Locomotion and Modulatory Mechanisms: Lessons from Lampreys.Frontiers in neural circuits · 2016Review
- Cannabinoids and Epilepsy.Neurotherapeutics : the journal of the American Society for Experimental NeuroTherapeutics · 2015Review
Corrections and comments
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Authors and funding
5 authors at 3 institutions in 2 countries.
Funding
Abstract
Neurotransmitters are thought to be released as quanta, where synaptic vesicles deliver packets of neurotransmitter to the synaptic cleft by fusion with the plasma membrane. However, synaptic vesicles may undergo incomplete fusion. We provide evidence that G protein-coupled receptors inhibit release by causing such incomplete fusion. 5-hydroxytryptamine (5-HT) receptor signaling potently inhibits excitatory postsynaptic currents (EPSCs) between lamprey reticulospinal axons and their postsynaptic targets by a direct action on the vesicle fusion machinery. We show that 5-HT receptor-mediated presynaptic inhibition, at this synapse, involves a reduction in EPSC quantal size. Quantal size was measured directly by comparing unitary quantal amplitudes of paired EPSCs before and during 5-HT application and indirectly by determining the effect of 5-HT on the relationship between mean-evoked EPSC amplitude and variance. Results from FM dye-labeling experiments indicate that 5-HT prevents full fusion of vesicles. 5-HT reduces FM1-43 staining of vesicles with a similar efficacy to its effect on the EPSC. However, destaining of FM1-43-labeled vesicles is abolished by lower concentrations of 5-HT that leave a substantial EPSC. The use of a water-soluble membrane impermeant quenching agent in the extracellular space reduced FM1-43 fluorescence during stimulation in 5-HT. Thus vesicles contact the extracellular space during inhibition of synaptic transmission by 5-HT. We conclude that 5-HT, via free Gbetagamma, prevents the collapse of synaptic vesicles into the presynaptic membrane.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.