Evidence map›Paper›PMID 32424166›Full record

ArticleScientific reports2020

Relationship between dementia and gut microbiome-associated metabolites: a cross-sectional study in Japan.

Naoki Saji, Kenta Murotani, Takayoshi Hisada, Tadao Kunihiro, Tsuyoshi Tsuduki, Taiki Sugimoto, Ai Kimura, Shumpei Niida, Kenji Toba, Takashi Sakurai

Open access · goldAbstract read
In one paragraph

Article in Scientific reports, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 46 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
46citing papers in PubMed, 1 pooled it
4.3field-weighted citation impact, top 5% 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

46 citing papers in PubMed, 1 synthesis or guideline pooled it, 86 citations in OpenAlex.

  1. Pooled it
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  4. Lactate and cognition: a dual modulator.Frontiers in molecular neuroscience · 2026
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  6. The influence of depression onset timing after gastrointestinal diseases on dementia risk.Alzheimer's & dementia : the journal of the Alzheimer's Association · 2025
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  7. ACS pharmacology & translational science · 2025
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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

10 authors at 3 institutions in 1 country.

Naoki SajiCenter for Comprehensive Care and Research on Memory Disorders, National Center for Geriatrics and Gerontology, Aichi, Japan. sajink@nifty.com.ORCID http://orcid.org/0000-0003-4228-1122
Kenta MurotaniBiostatistics Center, Graduate School of Medicine, Kurume University, Fukuoka, Japan.ORCID http://orcid.org/0000-0003-0623-9365
Takayoshi HisadaTechnoSuruga Laboratory Co., Ltd, Shizuoka, Japan.
Tadao KunihiroTechnoSuruga Laboratory Co., Ltd, Shizuoka, Japan.ORCID http://orcid.org/0000-0001-6484-9386
Tsuyoshi TsudukiLaboratory of Food and Biomolecular Science, Department of Bioscience and Biotechnology for Future Bioindustries, Graduate School of Agricultural Science, Tohoku University, Miyagi, Japan.
Taiki SugimotoCenter for Comprehensive Care and Research on Memory Disorders, National Center for Geriatrics and Gerontology, Aichi, Japan.
Ai KimuraCenter for Comprehensive Care and Research on Memory Disorders, National Center for Geriatrics and Gerontology, Aichi, Japan.
Shumpei NiidaMedical Genome Center, National Center for Geriatrics and Gerontology, Aichi, Japan.
Kenji TobaCenter for Comprehensive Care and Research on Memory Disorders, National Center for Geriatrics and Gerontology, Aichi, Japan.
Takashi SakuraiCenter for Comprehensive Care and Research on Memory Disorders, National Center for Geriatrics and Gerontology, Aichi, Japan.
National Center for Geriatrics and Gerontology · JPKurume University · JPTohoku University · JP

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Dysregulation of the gut microbiome is associated with dementia. However, the relationship between microbiome-associated metabolites and dementia has yet to be identified. Outpatients visiting a memory clinic in Japan enrolled in this cross-sectional study; 107 subjects were eligible for the study, 25 of which had dementia. We collected demographics, activities of daily living, risk factors, cognitive function, and brain imaging data. The gut microbiome was assessed using terminal restriction fragment length polymorphism analysis. Concentrations of faecal metabolite were measured. We used multivariable logistic regression analyses to identify whether metabolites were independently related to dementia. The concentrations of metabolites were significantly different between subjects with and those without dementia. Every 1 standard deviation increment in faecal ammonia concentration was associated with around a 1.6-fold risk for the presence of dementia. A higher faecal lactic acid concentration was related to a lower risk of dementia, by around 60%. A combination of higher faecal ammonia and lactic acid concentrations was indicative of the presence of dementia, and had a similar predictive value as traditional biomarkers of dementia. Thus, faecal ammonia and lactic acid are related to dementia, independently of the other risk factors for dementia and dysregulation of the gut microbiome.

Indexed as

Gastrointestinal MicrobiomeAgedAged, 80 and overAmmoniaBacteriaCognitionCross-Sectional StudiesDementiaFecesFemaleHumansJapanLactic AcidMaleAmmoniaLactic Acid

Identifiers

PMID32424166
PMCPMC7235213
OpenAlexW3024321144

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.