Evidence map›Paper›PMID 39122687›Full record

ArticleNature communications2024

Direct serotonin release in humans shapes aversive learning and inhibition.

Michael J Colwell, Hosana Tagomori, Fei Shang, Hoi Iao Cheng, Chloe E Wigg, Michael Browning, Philip J Cowen, Susannah E Murphy, Catherine J Harmer

Registry-linked trialAbstract read
In one paragraph

Article in Nature communications, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT07651293 (Using Fenfluramine to Test the Serotonin Deficiency Theory of Depression), which is not on this map. Cited by 11 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
11citing papers in PubMed, 1 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

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.

2 · The registry

The trial behind it

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.

NCT07651293 nanot yet recruitingnot on this mapstarted 2026, after this paper: background citation

Using Fenfluramine to Test the Serotonin Deficiency Theory of Depression

TypeinterventionalSponsorImperial College Healthcare NHS TrustRan2026 to 2028Enrolled46ConditionsDepression - Major Depressive DisorderArmsFenfluramine Hydrochloride, [11C]Cimbi-36, Placebo
3 · Its place in the literature

Who cites it

11 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

9 authors.

Michael J ColwellUniversity Department of Psychiatry, University of Oxford, Warneford Hospital, Oxford, UK. michael.colwell@psych.ox.ac.uk.ORCID 0000-0001-7846-2879
Hosana TagomoriUniversity Department of Psychiatry, University of Oxford, Warneford Hospital, Oxford, UK.ORCID 0000-0002-9883-4577
Fei ShangUniversity Department of Psychiatry, University of Oxford, Warneford Hospital, Oxford, UK.
Hoi Iao ChengUniversity Department of Psychiatry, University of Oxford, Warneford Hospital, Oxford, UK.
Chloe E WiggUniversity Department of Psychiatry, University of Oxford, Warneford Hospital, Oxford, UK.
Michael BrowningUniversity Department of Psychiatry, University of Oxford, Warneford Hospital, Oxford, UK.ORCID 0000-0001-9108-3144
Philip J CowenUniversity Department of Psychiatry, University of Oxford, Warneford Hospital, Oxford, UK.ORCID 0000-0001-5518-6138
Susannah E Murphy *University Department of Psychiatry, University of Oxford, Warneford Hospital, Oxford, UK.
Catherine J Harmer *University Department of Psychiatry, University of Oxford, Warneford Hospital, Oxford, UK. catherine.harmer@psych.ox.ac.uk.ORCID 0000-0002-1609-8335

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The role of serotonin in human behaviour is informed by approaches which allow in vivo modification of synaptic serotonin. However, characterising the effects of increased serotonin signalling in human models of behaviour is challenging given the limitations of available experimental probes, notably selective serotonin reuptake inhibitors. Here we use a now-accessible approach to directly increase synaptic serotonin in humans (a selective serotonin releasing agent) and examine its influence on domains of behaviour historically considered core functions of serotonin. Computational techniques, including reinforcement learning and drift diffusion modelling, explain participant behaviour at baseline and after week-long intervention. Reinforcement learning models reveal that increasing synaptic serotonin reduces sensitivity for outcomes in aversive contexts. Furthermore, increasing synaptic serotonin enhances behavioural inhibition, and shifts bias towards impulse control during exposure to aversive emotional probes. These effects are seen in the context of overall improvements in memory for neutral verbal information. Our findings highlight the direct effects of increasing synaptic serotonin on human behaviour, underlining its role in guiding decision-making within aversive and more neutral contexts, and offering implications for longstanding theories of central serotonin function.

Indexed as

SerotoninAdultAvoidance LearningDecision MakingEmotionsFemaleHumansInhibition, PsychologicalLearningMaleMemoryReinforcement, PsychologySelective Serotonin Reuptake InhibitorsYoung AdultSelective Serotonin Reuptake InhibitorsSerotonin

Identifiers

PMID39122687
PMCPMC11315928

What Socratic holds

Textmetadata
LicenceCC BY
Read underepoch 390

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 Socratic graph.