Evidence map›Paper›PMID 37314861›Full record

ArticleAnnals of neurology2023

Metagenomics of the Gut Microbiome in Parkinson's Disease: Prodromal Changes.

Natalia Palacios, Jeremy Wilkinson, Kjetil Bjornevik, Michael A Schwarzschild, Lauren McIver, Alberto Ascherio, Curtis Huttenhower

Open access · bronzeAbstract read
In one paragraph

Article in Annals of neurology, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 36 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
36citing papers in PubMed, 2 pooled it
10.1field-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

36 citing papers in PubMed, 2 syntheses or guidelines pooled it, 49 citations in OpenAlex.

  1. Beyond bacteria: a multi-omics view of the gut-brain axis in Parkinson's disease.Frontiers in cellular and infection microbiology · 2026
    Pooled it
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  9. Lifestyle medicine in Parkinson's disease.Journal of neural transmission (Vienna, Austria : 1996) · 2026
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  19. Gut neuropeptide involvement in Parkinson's disease.American journal of physiology. Gastrointestinal and liver physiology · 2025
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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

7 authors at 5 institutions in 2 countries.

Natalia PalaciosDepartment of Public Health, University of Massachusetts Lowell, Lowell, MA.ORCID 0000-0002-0643-7735
Jeremy WilkinsonHarvard Chan Microbiome in Public Health Center (HCMPH), Boston, MA.
Kjetil BjornevikDepartment of Nutrition, Harvard T.H. Chan School of Public Health, Boston, MA.ORCID 0000-0002-2892-6986
Michael A SchwarzschildDepartment of Neurology, Massachusetts General Hospital, Boston, MA.ORCID 0000-0001-6019-8280
Lauren McIverHarvard Chan Microbiome in Public Health Center (HCMPH), Boston, MA.
Alberto AscherioDepartment of Nutrition, Harvard T.H. Chan School of Public Health, Boston, MA.
Curtis HuttenhowerHarvard Chan Microbiome in Public Health Center (HCMPH), Boston, MA.
Broad Institute · USHarvard University · USBrigham and Women's Hospital · USMassachusetts General Hospital · USUniversity of Massachusetts Lowell · US

Funding

Long Term Multidisciplinary Study of Cancer in Women: The Nurses Health StudyUM1CA186107 · NCI · BRIGHAM AND WOMEN'S HOSPITAL · PI ELIASSEN, A. HEATHER, STAMPFER, MEIR · 2014 to 2023
$22.3M
Cancer Epidemiology Cohort in Male Health ProfessionalsU01CA167552 · NCI · HARVARD UNIVERSITY D/B/A HARVARD SCHOOL OF PUBLIC HEALTH · PI Lorelei Mucci, Walter C. Willett · 2017 to 2026
$17.0M
The Gut Microbiome in Parkinson DiseaseR01NS097723 · NINDS · UNIVERSITY OF MASSACHUSETTS LOWELL · PI PALACIOS, NATALIA · 2016 to 2021
$2.1M
NCI NIH HHS U01 CA167552NCI NIH HHS UM1 CA186107NIH HHS U01 CA167552NIH HHS UM1 CA186107NINDS NIH HHS R01 NS097723NINDS NIH HHS R01NS097723
6 · The paper itself

Abstract

objectivePrior studies on the gut microbiome in Parkinson's disease (PD) have yielded conflicting results, and few studies have focused on prodromal (premotor) PD or used shotgun metagenomic profiling to assess microbial functional potential. We conducted a nested case-control study within 2 large epidemiological cohorts to examine the role of the gut microbiome in PD.

methodsWe profiled the fecal metagenomes of 420 participants in the Nurses' Health Study and the Health Professionals Follow-up Study with recent onset PD (N = 75), with features of prodromal PD (N = 101), controls with constipation (N = 113), and healthy controls (N = 131) to identify microbial taxonomic and functional features associated with PD and features suggestive of prodromal PD. Omnibus and feature-wise analyses identified bacterial species and pathways associated with prodromal and recently onset PD.

resultsWe observed depletion of several strict anaerobes associated with reduced inflammation among participants with PD or features of prodromal PD. A microbiome-based classifier had moderate accuracy (area under the curve [AUC] = 0.76 for species and 0.74 for pathways) to discriminate between recently onset PD cases and controls. These taxonomic shifts corresponded with functional shifts indicative of carbohydrate source preference. Similar, but less marked, changes were observed in participants with features of prodromal PD, in both microbial features and functions.

interpretationPD and features of prodromal PD were associated with similar changes in the gut microbiome. These findings suggest that changes in the microbiome could represent novel biomarkers for the earliest phases of PD. ANN NEUROL 2023;94:486-501.

Indexed as

Gastrointestinal MicrobiomeParkinson DiseaseCase-Control StudiesFollow-Up StudiesHumansMetagenomicsProdromal Symptoms

Identifiers

PMID37314861
PMCPMC10538421
OpenAlexW4380538639

What OpenQuestion holds

Textmetadata
LicenceTDM
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.