Evidence map›Paper›PMID 36494405›Full record

ArticleNPJ Parkinson's disease2022

Gut microbiota in dementia with Lewy bodies.

Hiroshi Nishiwaki, Jun Ueyama, Kenichi Kashihara, Mikako Ito, Tomonari Hamaguchi, Tetsuya Maeda, Yoshio Tsuboi, Masahisa Katsuno, Masaaki Hirayama, Kinji Ohno

Open access · goldAbstract read
In one paragraph

Article in NPJ Parkinson's disease, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 37 papers.

0numbers the graph read from it
0cells of the map it votes in
37citing papers in PubMed
7.7field-weighted citation impact, top 2% 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

37 citing papers in PubMed, 49 citations in OpenAlex.

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  13. Blood microbiome signatures in the REM sleep behavior disorder-Lewy body disease continuum.Journal of neural transmission (Vienna, Austria : 1996) · 2025
    Article
  14. Article
  15. Article
  16. Article
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  18. Lewy body diseases and the gut.Molecular neurodegeneration · 2025
    Review
  19. Article
  20. Article
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

10 authors at 4 institutions in 1 country.

Hiroshi NishiwakiDivision of Neurogenetics, Center for Neurological Diseases and Cancer, Nagoya University Graduate School of Medicine, Nagoya, Japan.
Jun UeyamaDepartment of Pathophysiological Laboratory Sciences, Nagoya University Graduate School of Medicine, Nagoya, Japan.
Kenichi KashiharaDepartment of Neurology, Okayama Kyokuto Hospital, Okayama, Japan.
Mikako ItoDivision of Neurogenetics, Center for Neurological Diseases and Cancer, Nagoya University Graduate School of Medicine, Nagoya, Japan.ORCID http://orcid.org/0000-0002-1351-7602
Tomonari HamaguchiDivision of Neurogenetics, Center for Neurological Diseases and Cancer, Nagoya University Graduate School of Medicine, Nagoya, Japan.
Tetsuya MaedaDivision of Neurology and Gerontology, Department of Internal Medicine, School of Medicine, Iwate Medical University, Iwate, Japan.ORCID http://orcid.org/0000-0002-6207-8343
Yoshio TsuboiDepartment of Neurology, Fukuoka University, Fukuoka, Japan.ORCID http://orcid.org/0000-0002-6758-0981
Masahisa KatsunoDepartment of Neurology, Nagoya University Graduate School of Medicine, Nagoya, Japan.ORCID http://orcid.org/0000-0001-9453-9311
Masaaki HirayamaDepartment of Pathophysiological Laboratory Sciences, Nagoya University Graduate School of Medicine, Nagoya, Japan. hirasan@met.nagoya-u.ac.jp.ORCID http://orcid.org/0000-0003-0092-7837
Kinji OhnoDivision of Neurogenetics, Center for Neurological Diseases and Cancer, Nagoya University Graduate School of Medicine, Nagoya, Japan. ohnok@med.nagoya-u.ac.jp.ORCID http://orcid.org/0000-0002-1529-2750
Nagoya University · JPFukuoka University · JPIwate Medical University · JPOkayama Psychiatric Medical Center · JP

Funding

Japan Agency for Medical Research and Development (AMED) JP21ek0109488, and JP21bm0804005Japan Society for the Promotion of Science London (JSPS London) 22K17343MEXT | Japan Society for the Promotion of Science (JSPS) JP21H03561, JP20K06925, and JP22K15394Ministry of Health, Labour and Welfare (Ministry of Health, Labour and Welfare, Japan) 20FC1036National Center of Neurology and Psychiatry (NCNP) 2-5
6 · The paper itself

Abstract

Gut microbiota and fecal bile acids were analyzed in 278 patients with α-synucleinopathies, which were comprised of 28 patients with dementia with Lewy bodies (DLB), 224 patients with Parkinson's disease (PD), and 26 patients with idiopathic rapid eye movement sleep behavior disorder (iRBD). Similarly to PD, short-chain fatty acids-producing genera were decreased in DLB. Additionally, Ruminococcus torques and Collinsella were increased in DLB, which were not changed in PD. Random forest models to differentiate DLB and PD showed that high Ruminococcus torques and high Collinsella, which presumably increase intestinal permeability, as well as low Bifidobacterium, which are also observed in Alzheimer's disease, were predictive of DLB. As Ruminococcus torques and Collinsella are also major secondary bile acids-producing bacteria, we quantified fecal bile acids and found that the production of ursodeoxycholic acid (UDCA) was high in DLB. Increased UDCA in DLB may mitigate neuroinflammation at the substantia nigra, whereas neuroinflammation may not be critical at the neocortex. Theraeutic intervention to increase Bifidobacteirum and its metabolites may retard the development and progression of DLB.

Identifiers

PMID36494405
PMCPMC9734655
OpenAlexW4311286086

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.