Evidence map›Paper›PMID 33293403›Full record

ArticlemSystems2020

Short-Chain Fatty Acid-Producing Gut Microbiota Is Decreased in Parkinson's Disease but Not in Rapid-Eye-Movement Sleep Behavior Disorder.

Hiroshi Nishiwaki, Tomonari Hamaguchi, Mikako Ito, Tomohiro Ishida, Tetsuya Maeda, Kenichi Kashihara, Yoshio Tsuboi, Jun Ueyama, Teppei Shimamura, Hiroshi Mori and 4 more

Open access · goldAbstract read
In one paragraph

Article in mSystems, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 76 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
76citing papers in PubMed, 2 pooled it
6.0field-weighted citation impact, top 3% 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

76 citing papers in PubMed, 2 syntheses or guidelines pooled it, 131 citations in OpenAlex.

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  16. Blood microbiome signatures in the REM sleep behavior disorder-Lewy body disease continuum.Journal of neural transmission (Vienna, Austria : 1996) · 2025
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16 more citing papers are in PubMed but not listed here.

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

14 authors at 5 institutions in 1 country.

Hiroshi NishiwakiDivision of Neurogenetics, Center for Neurological Diseases and Cancer, Nagoya University Graduate School of Medicine, Nagoya, Japan.
Tomonari HamaguchiDivision of Neurogenetics, Center for Neurological Diseases and Cancer, Nagoya University Graduate School of Medicine, Nagoya, Japan.
Mikako ItoDivision of Neurogenetics, Center for Neurological Diseases and Cancer, Nagoya University Graduate School of Medicine, Nagoya, Japan.
Tomohiro IshidaDepartment of Pathophysiological Laboratory Sciences, 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.
Kenichi KashiharaDepartment of Neurology, Okayama Kyokuto Hospital, Okayama, Japan.
Yoshio TsuboiDepartment of Neurology, Fukuoka University, Fukuoka, Japan.
Jun UeyamaDepartment of Pathophysiological Laboratory Sciences, Nagoya University Graduate School of Medicine, Nagoya, Japan.
Teppei ShimamuraDivision of Systems Biology, Center for Neurological Diseases and Cancer, Nagoya University Graduate School of Medicine, Nagoya, Japan.
Hiroshi MoriGenome Evolution Laboratory, Department of Informatics, National Institute of Genetics, Mishima, Japan.
Ken KurokawaGenome Evolution Laboratory, Department of Informatics, National Institute of Genetics, Mishima, Japan.
Masahisa KatsunoDepartment of Neurology, Nagoya University Graduate School of Medicine, Nagoya, Japan.
Masaaki HirayamaDepartment of Pathophysiological Laboratory Sciences, Nagoya University Graduate School of Medicine, Nagoya, Japan hirasan@met.nagoya-u.ac.jp ohnok@med.nagoya-u.ac.jp.
Kinji OhnoDivision of Neurogenetics, Center for Neurological Diseases and Cancer, Nagoya University Graduate School of Medicine, Nagoya, Japan hirasan@met.nagoya-u.ac.jp ohnok@med.nagoya-u.ac.jp.ORCID https://orcid.org/0000-0002-1529-2750
Nagoya University · JPNational Institute of Genetics · JPFukuoka University · JPHokuto Hospital · JPIwate Medical University · JP

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Gut dysbiosis has been repeatedly reported in Parkinson's disease (PD) but only once in idiopathic rapid-eye-movement sleep behavior disorder (iRBD) from Germany. Abnormal aggregation of α-synuclein fibrils causing PD possibly starts from the intestine, although this is still currently under debate. iRBD patients frequently develop PD. Early-stage gut dysbiosis that is causally associated with PD is thus expected to be observed in iRBD. We analyzed gut microbiota in 26 iRBD patients and 137 controls by 16S rRNA sequencing (16S rRNA-seq). Our iRBD data set was meta-analyzed with the German iRBD data set and was compared with gut microbiota in 223 PD patients. Unsupervised clustering of gut microbiota by LIGER, a topic model-based tool for single-cell RNA sequencing (RNA-seq) analysis, revealed four enterotypes in controls, iRBD, and PD. Short-chain fatty acid (SCFA)-producing bacteria were conserved in an enterotype observed in controls and iRBD, whereas they were less conserved in enterotypes observed in PD. Genus

Indexed as

gut microbiotameta-analysisParkinson’s diseaserapid-eye-movement behavior disordertopic model

Identifiers

PMID33293403
PMCPMC7771407
OpenAlexW3113071498

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.