Evidence map›Paper›PMID 34262156›Full record

ReviewNature reviews. Endocrinology2021

Potential gut-brain mechanisms behind adverse mental health outcomes of bariatric surgery.

Robyn M Brown, Eva Guerrero-Hreins, Wendy A Brown, Carel W le Roux, Priya Sumithran

Registry-linked trialAbstract readReview
PubMed Publisher
In one paragraph

Review in Nature reviews. Endocrinology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT06491069 (Depression, Anxiety and Eating Disorder After Bariatric Surgery), which is not on this map. Cited by 34 papers, 4 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
34citing papers in PubMed, 4 pooled it
4.1field-weighted citation impact, top 5% of its field
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.

NCT06491069 unknown statusnot on this mapstarted 2024, after this paper: background citation

Depression, Anxiety and Eating Disorder After Bariatric Surgery

Typeobservational_patient_registrySponsorSohag UniversityRan2024 to 2025Enrolled50ConditionsDepression, Anxiety, Eating Disorders, Bariatric Surgery
3 · Its place in the literature

Who cites it

34 citing papers in PubMed, 4 syntheses or guidelines pooled it, 44 citations in OpenAlex.

  1. Depressive symptoms at short-, medium-, and long-term follow-up after bariatric surgical procedures: A systematic review and meta-analysis.Obesity reviews : an official journal of the International Association for the Study of Obesity · 2025
    Pooled it
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  13. Mental health outcomes in bariatric surgery patients in Saudi Arabia: A scoping review.Saudi journal of gastroenterology : official journal of the Saudi Gastroenterology Association · 2025
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  15. Early Impact of Bariatric Surgery on Brain Functionality.Journal of metabolic and bariatric surgery · 2025
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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

5 authors at 3 institutions in 2 countries.

Robyn M BrownFlorey Institute of Neuroscience and Mental Health, University of Melbourne, Parkville, Victoria, Australia.
Eva Guerrero-HreinsFlorey Institute of Neuroscience and Mental Health, University of Melbourne, Parkville, Victoria, Australia.
Wendy A BrownDepartment of Surgery, Central Clinical School, Monash University, Alfred Hospital, Melbourne, Victoria, Australia.
Carel W le RouxDiabetes Complications Research Centre, Conway Institute, School of Medicine and Medical Sciences, University College, Dublin, Ireland.ORCID http://orcid.org/0000-0001-5521-5445
Priya SumithranDepartment of Medicine (St Vincent's), University of Melbourne, Melbourne, Victoria, Australia. priyas@unimelb.edu.au.ORCID http://orcid.org/0000-0002-9576-1050
The University of Melbourne · AUMonash University · AUUniversity College Dublin · IE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Bariatric surgery induces sustained weight loss and metabolic benefits via notable effects on the gut-brain axis that lead to alterations in the neuroendocrine regulation of appetite and glycaemia. However, in a subset of patients, bariatric surgery is associated with adverse effects on mental health, including increased risk of suicide or self-harm as well as the emergence of depression and substance use disorders. The contributing factors behind these adverse effects are not well understood. Accumulating evidence indicates that there are important links between gut-derived hormones, microbial and bile acid profiles, and disorders of mood and substance use, which warrant further exploration in the context of changes in gut-brain signalling after bariatric surgery. Understanding the basis of these adverse effects is essential in order to optimize the health and well-being of people undergoing treatment for obesity.

Indexed as

AppetiteBariatric SurgeryBrainCell CommunicationDiabetes Mellitus, Type 2Gastrointestinal HormonesHumansIntestinesMental DisordersNeurosecretory SystemsObesityTreatment OutcomeGastrointestinal Hormones

Identifiers

PMID34262156
OpenAlexW3182061063

What Socratic holds

Textmetadata
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.