Evidence map›Paper›PMID 37849234›Full record

ArticleBrain : a journal of neurology2023

Microbiota from Alzheimer's patients induce deficits in cognition and hippocampal neurogenesis.

Stefanie Grabrucker, Moira Marizzoni, Edina Silajdžić, Nicola Lopizzo, Elisa Mombelli, Sarah Nicolas, Sebastian Dohm-Hansen, Catia Scassellati, Davide Vito Moretti, Melissa Rosa and 9 more

Erratum issuedOpen access · hybridAbstract read
In one paragraph

Article in Brain : a journal of neurology, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. An erratum has been issued. Cited by 157 papers, 7 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
157citing papers in PubMed, 7 pooled it
19.6field-weighted citation impact, top 1% 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.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

157 citing papers in PubMed, 7 syntheses or guidelines pooled it, 199 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Pooled it
  4. Pooled it
  5. Pooled it
  6. Pooled it
  7. Pooled it
  8. Article
  9. Review
  10. Review
  11. Review
  12. Article
  13. Review
  14. Article
  15. Article
  16. Article
  17. Article
  18. Article
  19. Article
  20. Article

97 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

19 authors at 4 institutions in 3 countries.

Stefanie GrabruckerDepartment of Anatomy and Neuroscience, University College Cork, Ireland.
Moira MarizzoniBiological Psychiatry Unit, IRCCS Fatebenefratelli, Brescia, Italy.
Edina SilajdžićDepartment of Basic and Clinical Neuroscience, Institute of Psychiatry, King's College London, SE5 9NU London, UK.
Nicola LopizzoBiological Psychiatry Unit, IRCCS Fatebenefratelli, Brescia, Italy.
Elisa MombelliBiological Psychiatry Unit, IRCCS Fatebenefratelli, Brescia, Italy.
Sarah NicolasDepartment of Anatomy and Neuroscience, University College Cork, Ireland.
Sebastian Dohm-HansenDepartment of Anatomy and Neuroscience, University College Cork, Ireland.
Catia ScassellatiBiological Psychiatry Unit, IRCCS Fatebenefratelli, Brescia, Italy.
Davide Vito MorettiAlzheimer Unit, IRCCS Fatebenefratelli, Brescia, Italy.
Melissa RosaBiological Psychiatry Unit, IRCCS Fatebenefratelli, Brescia, Italy.
Karina HoffmannDepartment of Basic and Clinical Neuroscience, Institute of Psychiatry, King's College London, SE5 9NU London, UK.
John F CryanDepartment of Anatomy and Neuroscience, University College Cork, Ireland.ORCID 0000-0001-5887-2723
Olivia F O'LearyDepartment of Anatomy and Neuroscience, University College Cork, Ireland.ORCID 0000-0002-9171-2032
Jane A EnglishDepartment of Anatomy and Neuroscience, University College Cork, Ireland.
Aonghus LavelleDepartment of Anatomy and Neuroscience, University College Cork, Ireland.
Cora O'NeillAPC Microbiome Ireland, University College Cork, Ireland.
Sandrine ThuretDepartment of Basic and Clinical Neuroscience, Institute of Psychiatry, King's College London, SE5 9NU London, UK.ORCID 0000-0003-1260-8083
Annamaria CattaneoBiological Psychiatry Unit, IRCCS Fatebenefratelli, Brescia, Italy.
Yvonne M NolanDepartment of Anatomy and Neuroscience, University College Cork, Ireland.ORCID 0000-0003-2426-234X
University College Cork · IECentro San Giovanni di Dio Fatebenefratelli · ITKing's College London · GBUniversity of Milan · IT

Funding

Medical Research Council MR/S00484X/1
6 · The paper itself

Abstract

Alzheimer's disease is a complex neurodegenerative disorder leading to a decline in cognitive function and mental health. Recent research has positioned the gut microbiota as an important susceptibility factor in Alzheimer's disease by showing specific alterations in the gut microbiome composition of Alzheimer's patients and in rodent models. However, it is unknown whether gut microbiota alterations are causal in the manifestation of Alzheimer's symptoms. To understand the involvement of Alzheimer's patient gut microbiota in host physiology and behaviour, we transplanted faecal microbiota from Alzheimer's patients and age-matched healthy controls into microbiota-depleted young adult rats. We found impairments in behaviours reliant on adult hippocampal neurogenesis, an essential process for certain memory functions and mood, resulting from Alzheimer's patient transplants. Notably, the severity of impairments correlated with clinical cognitive scores in donor patients. Discrete changes in the rat caecal and hippocampal metabolome were also evident. As hippocampal neurogenesis cannot be measured in living humans but is modulated by the circulatory systemic environment, we assessed the impact of the Alzheimer's systemic environment on proxy neurogenesis readouts. Serum from Alzheimer's patients decreased neurogenesis in human cells in vitro and were associated with cognitive scores and key microbial genera. Our findings reveal for the first time, that Alzheimer's symptoms can be transferred to a healthy young organism via the gut microbiota, confirming a causal role of gut microbiota in Alzheimer's disease, and highlight hippocampal neurogenesis as a converging central cellular process regulating systemic circulatory and gut-mediated factors in Alzheimer's.

Indexed as

Alzheimer DiseaseGastrointestinal MicrobiomeAnimalsCognitionHippocampusHumansNeurogenesisRatsadult hippocampal neurogenesisAlzheimer’s diseasefaecal microbiota transplantationmemory

Identifiers

PMID37849234
PMCPMC10689930
OpenAlexW4387729030

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC
Read underepoch 390

Registered trials

None linked

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.