Evidence map›Paper›PMID 40180909›Full record

ArticleNPJ Parkinson's disease2025

A prebiotic dietary pilot intervention restores faecal metabolites and may be neuroprotective in Parkinson's Disease.

Janis Rebecca Bedarf, Stefano Romano, Silke Sophie Heinzmann, Anthony Duncan, Maria H Traka, Duncan Ng, Daniella Segovia-Lizano, Marie-Christine Simon, Arjan Narbad, Ullrich Wüllner and 1 more

Abstract read
In one paragraph

Article in NPJ Parkinson's disease, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 23 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
23citing 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.

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

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

  1. Pooled it
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  9. Gut-Brain Signaling in Parkinson's Disease: A Narrative Review.International journal of molecular sciences · 2026
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  12. Lifestyle medicine in Parkinson's disease.Journal of neural transmission (Vienna, Austria : 1996) · 2026
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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

11 authors.

Janis Rebecca BedarfDepartent of Movement Disorders (PSB), Centre of Neurology, University Hospital Bonn, Bonn, Germany. janis.bedarf@ukbonn.de.
Stefano RomanoFood, Microbiome, and Health, Quadram Institute Bioscience, Norfolk, UK.ORCID http://orcid.org/0000-0002-7600-1953
Silke Sophie HeinzmannResearch Unit Analytical BioGeoChemistry, Helmholtz Centre Munich, Neuherberg, Munich, Germany.
Anthony DuncanFood, Microbiome, and Health, Quadram Institute Bioscience, Norfolk, UK.ORCID http://orcid.org/0000-0002-3849-9527
Maria H TrakaFood & Nutrition National Bioscience Research Infrastructure, Quadram Institute Bioscience, Norfolk, UK.
Duncan NgFood & Nutrition National Bioscience Research Infrastructure, Quadram Institute Bioscience, Norfolk, UK.
Daniella Segovia-LizanoFood & Nutrition National Bioscience Research Infrastructure, Quadram Institute Bioscience, Norfolk, UK.
Marie-Christine SimonInstitute of Nutritional and Food Sciences (IEL), Nutrition and Health, University of Bonn, Bonn, Germany.
Arjan NarbadFood, Microbiome, and Health, Quadram Institute Bioscience, Norfolk, UK.
Ullrich WüllnerDepartent of Movement Disorders (PSB), Centre of Neurology, University Hospital Bonn, Bonn, Germany.
Falk HildebrandFood, Microbiome, and Health, Quadram Institute Bioscience, Norfolk, UK. falk.hildebrand@quadram.ac.uk.

Funding

RCUK | Biotechnology and Biological Sciences Research Council (BBSRC) BB/CCG2260/1
6 · The paper itself

Abstract

Current treatment of Parkinson's Disease (PD) remains symptomatic, and disease-modifying approaches are urgently required. A promising approach is to modify intestinal microbiota and key metabolites of bacterial fermentation: short-chain fatty acids (SCFA), which are decreased in PD. A prospective, controlled pilot study (DRKS00034528) was conducted on 11 couples (PD patient plus healthy spouse as control (CO)). Participants followed a 4-week diet rich in dietary fibre, including intake of the prebiotic Lactulose. Gut metagenomes, faecal and urinary metabolites, and clinical characteristics were assessed. The dietary intervention significantly augmented faecal SCFA and increased Bifidobacteria spp., reducing PD-related gastrointestinal symptoms. The pre-existing bacterial dysbiosis in PD (depletion of Blautia, Dorea, Erysipelatoclostridium) persisted. Bacterial metabolite composition in faeces and urine positively changed with the intervention: Brain-relevant gut metabolic functions involved in neuroprotective and antioxidant pathways, including S-adenosyl methionine, glutathione, and inositol, improved in PD. These promising results warrant further investigation in larger cohorts.

Identifiers

PMID40180909
PMCPMC11968880

What OpenQuestion holds

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Registered trials

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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.